Patent Description:
<CIT> describes "an apparatus for lengthening of extremities includes at least two supporting rings, a plurality of spikes mounted in each of the at least two supporting rings by spike-fixating elements, the at least two supporting rings connected with one another by threaded rods, which are displaced into rectilinear movement by automated drives connected with a portable block for power supply and control" (abstract).

<CIT> describes a medical device, comprising: a medical strut; a preloader configured to store energy, wherein the medical strut is configured to transform the energy stored in the preloader to a first force applicable to a bodily tissue; an actuator configured to apply a second force to adjust the length of the medical strut, thereby facilitating the transforming the stored energy to the first force; and a controller configured to control the actuator. In an embodiment, a sensor may be provided for measuring an indicator for multiple struts. In one embodiment, the sensor may trigger an alert in case of malfunction or emergency.

<CIT> describes a method for adjusting the orientation of a first external fixator support member relative to a second external fixator support member, wherein a plurality of adjustable struts connect the first and second external fixator support members, wherein the plurality of adjustable struts further comprise a first adjustable strut having an initial length, the first adjustable strut comprising a strut identifier operable to provide a signal, the method comprising: providing a programmable tool, the programmable tool comprising a controller in electrical communication with a memory unit and an actuator, the actuator operable to engage at least one of the plurality of adjustable struts and adjust the length of said at least one of the plurality of adjustable struts; storing, in the memory unit, instructions for adjusting the length of the first adjustable strut to a desired length; receiving identification information corresponding to the first adjustable strut in the signal provided from the strut identifier of the first adjustable strut; retrieving, from the memory unit, the instructions for adjusting the length of the first adjustable strut based on the identification information corresponding to the first adjustable strut; and activating the actuator to adjust the length of the first adjustable strut according to the retrieved instructions. In an embodiment, the programmable tool further comprises a measuring device for measuring the length of the plurality of adjustable struts, and the method further comprises determining the length of the first adjustable strut prior to and after adjusting the length of the first adjustable strut; and confirming that the first strut has the desired length.

Patent Application <CIT> describes a tool for implementing a correction plan in an external fixation frame having a plurality of adjustment elements or screws, for example, generally includes a driver, a motor, a controller, and a processor. The driver is adapted to engage and rotate each of the screws. The motor is coupled the driver and adapted to rotate the driver. The controller is connected to the motor and configured to control operation of the motor. The processor is adapted configured to: receive correction plan data; receive identification data including information for identifying at least one of the plurality of screws; determine movement of at least one of the plurality of the screws based on the correction plan data and the identification data; and send signals indicative of the determined movement to the controller in order to rotate at least one of the plurality of screws according to a predetermined correction plan. In an embodiment, if a screw has not been completely rotated in accordance with the correction plan, then the motor controller instructs the motor to continue rotating the driver until the identified screw has been rotated in accordance with the correction plan.

The invention provides an electrical circuitry according to the appended claims.

As will be appreciated by one skilled in the art, some embodiments of the present disclosure may be embodied as a system, method or computer program product. Accordingly, some embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a "circuit", "module" or "system". Furthermore, some embodiments of the present invention may take the form of a computer program product embodied in one or more computer readable medium(s) having computer readable program code embodied thereon. Implementation of the method and/or system of some embodiments of the invention can involve performing and/or completing selected tasks manually, automatically, or a combination thereof. Moreover, according to actual instrumentation and equipment of some embodiments of the system of the invention, several selected tasks could be implemented by hardware, by software or by firmware and/or by a combination thereof, e.g., using an operating system.

For example, hardware for performing selected tasks according to some embodiments of the invention could be implemented as a chip or a circuit. As software, selected tasks according to some embodiments of the invention could be implemented as a plurality of software instructions being executed by a computer using any suitable operating system. In an exemplary embodiment of the invention, one or more tasks according to some exemplary embodiments of method and/or system as described herein are performed by a data processor, such as a computing platform for executing a plurality of instructions.

Any combination of one or more computer readable medium(s) may be utilized for some embodiments of the invention.

Program code embodied on a computer readable medium and/or data used thereby may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for some embodiments of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages.

Some embodiments of the present invention may be described below with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention.

Some of the methods described herein are generally designed only for use by a computer, and may not be feasible or practical for performing purely manually, by a human expert. A human expert who wanted to manually perform similar tasks, such as measuring the force applied by the linear actuators of a bone fixation device, might be expected to use completely different methods, e.g., making use of expert knowledge and/or the pattern recognition capabilities of the human brain, which would be vastly more efficient than manually going through the steps of the methods described herein.

The present invention relates to an electrical circuitry.

The invention relates to monitoring the compliance of a bone fixation device user with a treatment protocol. An electrical circuitry, for example an interface module monitors the user's compliance by measuring activation parameters of the bone fixation device, for example the movement and/or the extension length of at least one linear actuator. Alternatively, the electrical circuitry measures the position and/or orientation of at least two rings connected to the linear actuator.

In some embodiments, the electrical circuitry compares the measured activation parameters to stored parameters. In some embodiments, the compliance of the user with the treatment protocol is determined by the electrical circuitry based on the comparison between the measured activation parameters and the stored activation parameters. Alternatively, the measured activation parameters are transmitted to a remote computer and/or to a handheld device.

In some embodiments, the user of the bone fixation device receives a treatment compliance indication, for example a compliance report by the interface module. Optionally, the interface module transmits compliance information to a computer and/or to a handheld device which generates the compliance indication.

In some embodiments, the interface module transmits a compliance indication, for example a compliance report to a computer and/or a handheld device of an expert. In some embodiments, an expert and/or a user receive a compliance report from the interface module at the end of each treatment session. Alternatively, the expert receives a compliance report by remote contacting the interface module. In some embodiments, the expert, for example a physician delivers a modified treatment protocol to the interface module in response to the compliance report.

In some embodiments, the interface module stores at least one compliance parameter on a memory circuitry. In some embodiments, the at least one compliance parameter comprises timing parameters of each treatment session performed by the user. In some embodiments, the at least one compliance parameter comprises input received by the user.

In some embodiments, measuring the treatment compliance by the electrical circuitry allows, for example for a physician to monitor treatment compliance when the patient is at his home. In some embodiments a physician receives a treatment compliance report by sending a signal to the electrical circuitry.

In some embodiments, the electrical circuitry, for example an interface module is integrated in the bone fixation device, for example in at least one ring and/or in at least one strut. Alternatively, the electrical circuitry, for example the interface module is connected to the bone fixation device. Optionally, the electrical circuitry is attached and detached from the bone fixation device.

An aspect of some embodiments relates to measurements of at least one functional and/or clinical parameter value affected by the healing process of the fractured bone. In some embodiments, the at least one functional parameter is measured by at least one sensor of an electrical circuitry, for example an interface module and/or by at least one sensor of a handheld device. Alternatively, the at least one parameter is measured by at least one sensor connected to the limb. In some embodiments, the at least one sensor which is connected to the limb transmits a wireless signal to the electrical circuitry. Alternatively, the at least one sensor is connected to the electrical circuitry via wires.

In some embodiments, the at least one functional parameter comprises the motion and/or the range of motion and/or the acceleration of the limb. In some embodiments, the at least one parameter is the range of motion of a joint adjacent to the bone fixation device, for example the knee joint and/or the ankle joint.

In some embodiments, the electrical circuitry, for example the interface module measures the tilt of the limb using a tilt sensor and/or a gyroscope and/or an accelerometer of the interface module. Alternatively, a handheld device of the user comprises a sensor, for example an accelerometer-based goniometer to measure the motion and/or range of motion and/or the acceleration of the limb connected to the bone fixation device.

In some embodiments, the at least one parameter measured by the user's handheld device is transmitted to the interface module. In some embodiments, a user of the bone fixation device receives instructions how to perform the measurement, for example in which direction to move the limb.

In some embodiments, the functional parameter is compared to pre-determined values stored in a memory circuitry of the interface module. In some embodiments, if the measured parameter is not within a pre-determined range of values, an indication is delivered to the user. Optionally an indication is transmitted to an expert by the interface module.

In some embodiments, the clinical parameter comprises the body temperature at the fracture area. In some embodiments, if the measured body temperature at the fracture area is higher than a pre-determined value, then an indication, for example an alert signal is transmitted to a user and/or to an expert. Optionally, the interface module stops the treatment session if the measured body temperature is higher than a predetermined value. In some embodiments, measuring the body temperature provides an indication to an inflammation process at the fracture site.

In some embodiments, the clinical parameter comprises the color of the tissue at the fractured area. In some embodiments, the color of the tissue is measured by a camera connected to the interface module of the bone fixation device. In some embodiment, changing in the tissue color provide indication to the healing process of the fractured bone.

An aspect of some embodiments relates to attachment and detachment of an electrical circuitry, for example an interface module from a bone fixation device without the use of an additional tool or device. In some embodiments, the electrical circuitry comprises at least one attachment and detachment member configured to connect the electrical circuitry with at least one ring and/or at least one linear actuator of a bone fixation device without using an additional tool or an additional device.

In some embodiments, the at least one attachment and detachment member comprises a mechanical and/or an electrical connection to at least one linear actuator of the bone fixation device. Optionally, the at least one attachment and detachment member is asymmetrically distributed and/or asymmetrically designed to allow, for example a single connection option between the electrical circuitry and the bone fixation device.

In some embodiments, the electrical circuitry comprises a fixed part configured to be connected to a bone fixation device, and a detachable part configured to be connected to the fixed part. In some embodiments, the fixed part comprises a connection member configured to allow, for example a stronger connection between the fixed part and the bone fixation device, compared to the connection between the detachable part and the fixed part, which uses an attachment/detachment member.

In some embodiments, when the bone fixation device is not operated and/or between treatment sessions, at least one component of the electrical circuitry is detached from the fixation device, for example a battery circuitry. In some embodiments, detaching at least one component of the interface module allows, for example to reduce the weight applied on the body. In some embodiments, detached components of the interface module comprise the bone fixation device linear actuator power supply and/or the linear actuator motor.

An aspect of some embodiments relates to pairing a single selected linear actuator of a bone fixation device with a single selected linear actuator connector of an electrical circuitry, for example an interface module, connected to the bone fixation device. In some embodiments, each linear actuator connector and/or each linear actuator is distinguishably tagged to prevent, for example false pairing between the two.

In some embodiments, each linear actuator of a bone fixation device is color coded, to allow, for example a correct connection between a selected linear actuator and a matched linear actuator connector. In some embodiments, the linear actuator of a bone fixation device has a distinctive structure that matches a complementary structure of a linear actuator connector of the bone fixation device. In some embodiments, if a non-matched linear actuator is connected to a linear actuator connector of the interface module, an alert indication is delivered to the user and/or to a remote expert.

An aspect of some embodiments relates to an electrical circuitry, for example an interface module connected to a bone fixation device, configured to deliver and/or to receive information. In some embodiments, the interface module delivers at least one human detectable indication regarding the treatment protocol and/or the treatment session. In some embodiments, the interface module delivers at least one indication regarding the operation of the interface module and/or the bone fixation device. In some embodiments, the interface module receives treatment feedback input regarding the treatment protocol and/or the treatment session from a user of the bone fixation device.

In some embodiments, a treatment feedback input comprises a pain indication. Alternatively or additionally, a treatment related input comprises a treatment session delay request from the user. Optionally, a treatment feedback input comprises a request to stop a treatment session, for example when a user presses an emergency button or switch connected to the interface module.

In some embodiments, the interface module delivers at least one indication to a user of the bone fixation device, for example to a patient and/or to a caregiver located near the interface module. In some embodiments, the interface module delivers at least one indication to a remote expert, for example a physician and/or a health professional located at a remote location, for example a clinic.

In some embodiments, the user controls the operation process of a bone fixation device, for example the movement of at least one linear actuator by the interface module. In some embodiments, the user receives instructions from the interface module regarding the movement of the linear actuator, for example which linear actuator to extend. In some embodiments, indications to the user include timing parameters of a treatment session, for example when a bone fixation device starts to operate and when it stops. In some embodiments the indications delivered to the user include alerts regarding the operation status of the bone fixation device, for example battery charging level.

In some embodiments the interface module comprises at least one input component, for example at least one button and/or a touch panel to receive information from the user. Alternatively, information from the user is transmitted via wireless signals, for example Bluetooth signals, from a handheld device to the interface module.

In some embodiments, the interface module delivers information received from the user to an expert, for example when a user approves a treatment session. Optionally, the interface module delivers an indication to an expert when a user reports on pain and/or when a user stops the bone fixation device operation, for example by pressing an emergency button of the interface module.

In some embodiments, the interface module comprises a microphone and a speaker which allows, for example wireless voice communication between a user and an expert or another person, for example when an emergency event occurs. In some embodiments, the wireless voice communication allows, for example an expert to receive feedback from the user and/or to deliver instructions to the user. In some embodiments, the expert contacts the user of the bone fixation device by sending the user a text message. In some embodiments, the text message is displayed by the interface module. Optionally, the text message is transmitted by the interface module to a handheld device of the user.

An aspect of some embodiments relates to an electrical circuitry, for example an interface module configured to control the operation of a bone fixation device. In some embodiments, the interface module controls the movement of at least one linear actuator of the bone fixation device. Additionally or alternatively, the interface module monitors the movement of at least one linear actuator of the bone fixation device.

In some embodiments, the interface module controls the operation of a bone fixation device according to an operation protocol stored in a memory circuitry of the interface module. In some embodiments, the treatment protocol is modified before and/or during the treatment session according to measurements performed by the interface module. Optionally, an expert modifies the treatment protocol by transmitting a modified treatment protocol to the interface module.

In some embodiments the electrical circuitry is an integral part of at least one ring or at least one linear actuator of a bone fixation device. Alternatively, the electrical circuitry is connected to at least one ring or at least one linear actuator of the bone fixation device.

According to some embodiments, an interface module is connected to a bone fixation device and allows, for example transmitting and receiving information to and from a user of the device, respectively. In some embodiments a user is the patient or a caregiver, for example a family member or a nurse located in the vicinity of the bone fixation device. Reference is now made to <FIG> depicting a general activation process of an electrical circuitry, for example an interface module by a user, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module connected to a bone fixation device transmits a human-detectable indication to a user before a treatment session initiates at <NUM>. Alternatively, the indication is transmitted from an interface module or a part of an interface module that is not attached to the bone fixation device. In some embodiments, a treatment session includes movement of at least one strut of a bone fixation device according to a treatment protocol.

According to some exemplary embodiments, when the indication is received, the user attaches the interface module or at least part of the interface module to the bone fixation device at <NUM>. In some embodiments, after attaching the interface module to the bone fixation device, the interface module transmits an indication to the user regarding the status of the bone fixation device. Optionally or additionally, the interface module transmits an indication to the user before and/or during the movement of at least one linear actuator, for example a strut connected to the bone fixation device.

According to some exemplary embodiments, the interface module moves at least one linear actuator at <NUM>. Optionally, the user signals the interface module to start a treatment session and/or to move at least one linear actuator, for example by pressing a button of the interface module or using a handheld device. In some embodiments, the linear actuator moves according to a treatment protocol. Optionally, the linear actuator moves according to a treatment protocol after it was adjusted by the user or an expert. In some embodiments, the linear actuator is moved by the user. In some embodiments, the linear actuator is moved by the user after the user receives instructions from the interface module, for example which linear actuator to move. In some embodiments, the interface module transmits an indication to the user at the end of the treatment session.

According to some exemplary embodiments, at the end of a treatment session, the user provides treatment feedback input using the interface module at <NUM>. Optionally, the user provides the treatment feedback input before and/or during the treatment session. In some embodiments, the treatment feedback input comprises a pain indication and/or the overall feeling of the user. In some embodiments, the interface module transmits the treatment feedback input to an expert and/or stores it in a memory circuitry.

According to some exemplary embodiments, the interface module generates and delivers a compliance indication to the user and/or to an expert regarding the treatment session at <NUM>. Optionally, the compliance indication is wirelessly transmitted to a handheld device or to a computer. In some embodiments, the compliance indication is delivered to the user during the treatment session. In some embodiments, the compliance indication comprises a compliance report.

According to some exemplary embodiments, the interface module transmits an indication to a user when it is possible to detach at least part of the interface module from the bone fixation device, for example to allow battery charging at <NUM>. In some embodiments, the complete interface module is detached. Alternatively, a battery of the interface module is detached to allow, for example its replacement or charging by an external charger. Optionally, when the interface module is detached from the bone fixation device, it is connected to a computer or a handheld device or to an external charger.

Reference is now made to <FIG> depicting an activation process of an electrical circuitry, for example an interface module which is an integral part of a bone fixation device or is connected to a bone fixation device, when a treatment session is not completed, according to some embodiments of the invention.

According to some exemplary embodiments, a user for example a patient or a caregiver receives an indication before the initiation of a treatment at <NUM>. In some embodiments, the indication is a human detectable indication delivered by the electrical circuitry. Alternatively, the interface circuitry signals a handheld device of the user to generate the indication. In some embodiments, the user approves the initiation of the treatment session.

According to some exemplary embodiments, the electrical circuitry determines the activation parameters of the bone fixation device at <NUM>. In some embodiments, the activation parameters are determined based on activation parameters stored in a memory of the electrical circuitry. In some embodiments, the electrical circuitry measures at least one clinical and/or functional parameter, for example body temperature at the fracture area before determining the activation parameters. In some embodiments, the activation parameters are based on the position and/or orientation of the rings of the bone fixation device. Alternatively or additionally, the activation parameters are determined based on the extension of at least one linear actuator of the bone fixation device.

According to some exemplary embodiments, at least one linear actuator is moved at <NUM>. In some embodiments, the electrical circuitry controls the movement of at least one linear actuator according to the determined activation parameters. Alternatively, a user of a bone fixation device moves at least one linear actuator according to the determined activation parameters. In some embodiments, each of the linear actuators of the bone fixation device moves in parallel to the rest of the linear actuators.

According to some exemplary embodiments, the movement of at least one linear actuator is stopped before the completion of a treatment session at <NUM>. In some embodiments, a user stops the movement of at least one linear actuator, for example when feeling pain. In some embodiments, a user stops the movement of at least one linear actuator by pressing an emergency button or switch. Alternatively, the movement of at least one linear actuator is stopped when an error and/or activation malfunction in the electrical circuitry and/or the bone fixation device occurs. In accordance with the invention, the movement of at least one linear actuator is stopped when over current is detected. Optionally, the movement of at least one linear actuator is stopped when a battery connected to the electrical circuitry and/to the bone fixation device is discharged.

In accordance with the invention, the electrical circuitry determines the treatment compliance at <NUM>. In some embodiments, the electrical circuitry measures the distance or the change in distance between at least two rings connected to the ends of at least one linear actuator of the bone fixation device and/or the orientation of the two rings to determine treatment compliance. Alternatively or additionally, the electrical circuitry measures the extension of at least one linear actuator.

The electrical circuitry determines compliance by comparing the measured parameters to stored parameters and deciding whether the measured parameters are in a desired range of the stored parameters. In some embodiments, compliance comprises determining if the measured parameters remain in the treatment's safety limitations boundaries.

In some embodiments, a user and/or an expert, for example a physician receives an alert indication when the activation of the bone fixation device is stopped, and/or when a treatment session is not completed. In some embodiments, the user and/or the expert receive a compliance indication, for example a compliance report when the treatment compliance is determined.

According to some exemplary embodiments, a user delivers a feedback after the treatment session is stopped at <NUM>. In some embodiments, feedback comprises pain indication. In some embodiments, a user delivers using an interface circuitry of the electrical circuitry. Alternatively, the user delivers a feedback using a handheld device communicating with the electrical circuitry. In some embodiments, the feedback is stored in a log file.

In some embodiments, the electrical circuitry stores an activation log file comprising compliance reports, indications for treatment session parameters, for example when a treatment is stopped and/or when an indication is delivered to a user and/or an expert. Optionally, the log files comprise the rings position and/or orientation and/or the extension of at least linear actuator before a treatment session and after a treatment session and when a treatment session is stopped. In some embodiments, the log file comprises each functional parameter value and/or clinical parameter value measured by the electrical circuitry.

According to some exemplary embodiments, an alert indication is delivered to the user and/or to an expert at <NUM>. In some embodiments, a high priority alert indication is delivered to the user of the bone fixation device and/or to an expert indicating that a treatment session is not completed. In some embodiments, the alert indication is generated and delivered by the electrical circuitry. Alternatively, the electrical circuitry signals a handheld device and/or a computer to generate the alert indication. In some embodiments, the alert indication includes a log file if the treatment session. Optionally, an expert, for example a physician will transmit instructions and/or a modified treatment protocol in response to the alert indication.

According to some exemplary embodiments, treatment modifications are introduced at <NUM>. In some embodiments, the treatment modifications are generated for example, to compensate for the incomplete treatment session. In some embodiments, the treatment modifications comprise protocol parameters modifications and/or changes in treatment sessions timing parameters. In some embodiments, the treatment modifications are delivered to the electrical circuitry by an expert, for example a physician. In some embodiments, the treatment modifications comprise activation instructions to the user of the bone fixation device.

In some embodiments, the treatment modifications are determined based on stored activation parameters and/or stored activation protocols and/or stored treatment protocols. In some embodiments, the treatment modifications take into consideration safety limitations of the treatment.

According to some exemplary embodiments, the extension of at least one linear actuator is modified at <NUM> to maintain the healing process of the fractured bone. In some embodiments, the extension of at least one linear actuator is modified, for example by reversing its movement to a previous extension value. In some embodiments, at least one linear actuator is shortened, for example to reach a desired distance between two rings connected to the linear actuator and/or orientation of the two rings. In some embodiments, the position and/or orientation of at least two rings connected to at least one linear actuator is modified to maintain the healing process of the fractured bone. In some embodiments, the movement of the at least one linear actuator is partially based on safety limitations of the treatment.

Reference is now made to <FIG> depicting a detailed activation process of an interface module by a user, according to some embodiments of the invention. According to some exemplary embodiments, a user of a bone fixation device receives an indication, for example vibration, before the beginning of a treatment session, from an interface module attached to the device and/or from a part of the interface module which is detached from the device at <NUM>. Optionally, the interface module transmits a signal to a handheld device of the user to generate an indication, for example vibration. In some embodiments the indication comprises a human detectable indication, generated for example by a light emitting component and/or a sound producing component of the interface module. In some embodiments, the indication delivered to the user includes the time remaining for the beginning of the treatment and/or other information related to the treatment.

In some embodiments, the user attaches the interface module to the bone fixation device following the indication, at <NUM>. In some embodiments, at least one part of the interface module is attached to the interface module and/or to the bone fixation device, for example an interface panel and/or a battery. In some embodiments, once the interface module is connected to the bone fixation device, the user receives an indication that the connection was successful and/or that the interface module or part of the interface module is connected properly to the device. Optionally, a user receives an indication from the interface module that each of the linear actuators is properly connected to the interface module. Alternatively, an alert signal is delivered if at least one linear actuator is not connected to the correct connector of the interface module.

In some embodiments, a user receives instructions from the interface module regarding the treatment session at <NUM>. In some embodiments, the instructions include the recommended body posture during the treatment session. In some embodiments, the instructions include which linear actuator to manually turn and/or when to turn each linear actuator. In some embodiments, the instructions include the turning time and/or the desired extension for each linear actuator.

In some embodiments, a user of the bone fixation device manually turns at least one selected linear actuator in a desired direction at <NUM>. In some embodiments, the user manually turns the at least one selected linear actuator according to the previously received instructions.

In some embodiments, during and/or after the manually turning of at least one linear actuator, a user provides a treatment feedback input via the interface module at <NUM>. In some embodiments, the treatment feedback input comprises, for example a pain indication. In some embodiments, the treatment feedback input comprises the satisfaction level of the user from the treatment session. Optionally, the interface module transmits the user's treatment feedback input to an expert, for example a physician.

In some embodiments, a user receives a compliance indication at <NUM>. Optionally, a user receives a compliance indication during the treatment session. In some embodiments, the compliance indication comprises an indication that the desired extension of the linear actuator is reached. Alternatively, a user receives an alert when the desired length is not reached. Optionally, a user receives a summarizing compliance indication report for at least one treatment session. In some embodiments, the compliance indication report comprises the extension length for each of the linear actuators and/or at least one parameter measured by at least one sensor of the interface module. In some embodiments, the compliance indication and/or the compliance report is transmitted to an expert, for example a physician, optionally by a wireless signal.

In some embodiments, the user receives an indication from the interface module that the treatment session is over at <NUM>. Optionally, once the treatment is over, a user detaches at least part of the interface module from the bone fixation device at <NUM>. In some embodiments the detachable part comprises a battery, to allow for example its replacement or charging by an external charger. Optionally, the detached part of the interface module is connected to a computer to allow, for example synchronization of the at least part of the data stored in the interface module and/or to download updates from the computer to the interface module.

According to some exemplary embodiments, a bone fixation device is connected to a bone of a patient during a surgery by an expert, for example an orthopedic surgeon. In some embodiments, a treatment protocol adjusted for the patient is uploaded into the interface module memory, and a system validation is performed to make sure that the interface module is properly connected to the bone fixation device and/or to the linear actuators. Reference is now made to <FIG> depicting an interface module activation process which includes measurements of functional and/or clinical parameters values, according to some embodiments of the invention.

According to some exemplary embodiments, a bone fixation device is connected to a limb, for example a leg of a patient during an orthopedic surgery, by a surgeon. In some embodiments, when the surgery is over, an interface module is attached to the bone fixation device and the combined apparatus undergoes an initial setup at <NUM>. In some embodiments, during setup <NUM> the connection between the linear actuators and the electrical circuitry, for example an interface module is checked. In some embodiments, during setup <NUM> the interface module parameters are adjusted to fit the selected bone fixation device, for example safety parameters of the linear actuator extension values. In some embodiments, during setup <NUM> the connection of each selected linear actuator of a bone fixation device to a selected connector or a connector input of the interface module is verified, for example by verification of the color code and/or the number of each linear connector and each connector. In some embodiments, during setup <NUM> the Radio-frequency identification (RFID) circuitry of the interface module is verified and/or the field-programmable gate array (FPGA) of the interface module is checked, for example to make sure that the interface module works properly. Alternatively, the identification of the interface module is verified using a barcode or any other identification means.

According to some exemplary embodiments, the interface module is identified by the RFID or by other means, every time it is re-connected to the bone fixation device, for example when it is re-connected to the bone fixation device after recharging.

In some embodiments, the identification process includes identification of the interface module and/or the bone fixation device. Optionally, the identification process includes identification of the specific ring to which the interface module is connected. In some embodiments, the identification process is performed before each activation of the interface module.

According to some exemplary embodiments, after the initial setup is completed a desired treatment protocol is inserted into the interface module memory circuitry at <NUM>, for example as a text file. In some embodiments, the treatment protocol is converted from a PDF file to a text file before the treatment protocol is uploaded to the interface module. In some embodiments, the treatment protocol is inserted to the interface module before or after the interface module is connected to the bone fixation device. In some embodiments, the treatment protocol is adjusted to the patient and/or to the bone fixation device that is connected to the interface module. In some embodiments the treatment protocol comprises information related to the treatment sessions, for example the starting time of each treatment session, the duration of the treatment session, and the desired extension of each linear actuator during each treatment session. In some embodiments, the interface module verifies the treatment protocol and/or the connection to each strut during protocol setup <NUM> or setup <NUM>. In some embodiments, if an error in the treatment protocol is identified and/or if a predetermined number of linear actuators is not connected or not identified then an alert signal is delivered. Alternatively or additionally, the activation process of the interface module is stopped. Optionally, setup <NUM> and/or protocol setup <NUM> are performed before or after the bone fixation device is connected to the limb of the patient.

According to some exemplary embodiments, before each treatment session begins, a human detectable alert signal is delivered to a user of the bone fixation device at <NUM>.

According to some exemplary embodiments, after an alert is sent to the user before the beginning of a treatments session, the interface module is configured to receive an approval indication from the user to start the treatment session at <NUM>. In some embodiments, a user decides to postpone or re-schedule the beginning of the next treatment session by providing a relevant indication to the interface module. Optionally, a physician or a nurse receives an indication regarding the user's decision to approve or to decline or to postpone the treatment session.

According to some exemplary embodiments, after a user approves the treatment session, an alert signal is delivered to the user to indicate the user when pre-movement measurements begin at <NUM>. In some embodiments, following the measurements alert at <NUM>, a user changes its body posture to a desired posture.

According to some exemplary embodiments, the interface module starts to perform measurements, for example of at least one functional and/or clinical parameter value affected by the healing process, using at least one sensor of the interface module at <NUM>. In some embodiments this clinical parameter comprises the body temperature at the fracture area. In some embodiments, the body temperature at the fracture area is measured using at least sensor of the interface module. In some embodiments, the body temperature at the connection points between the bone fixation device and the bone is measured to allow, for example detection and/or monitoring of inflammation conditions.

In some embodiments, the at least one functional parameter comprises the motion and/or range of motion and/or acceleration of the limb connected to the bone fixation device, and/or of at least one joint adjacent to the bone fixation device. In some embodiments, the at least one functional parameter comprises the blood flow at the limb connected to the bone fixation device and/or the density of the bone at the fracture area.

According to some exemplary embodiments, the measured functional parameter is analyzed at <NUM>. In some embodiments, the at least one measured functional parameter is compared to desired values and/or to safety parameter values. In some embodiments, the desired values of the measured parameters and/or the safety parameter values were inserted to the interface module memory at protocol setup <NUM>. Optionally, the desired values of the measured parameters and/or the safety parameter values were inserted by an expert using a remote computer.

According to some exemplary embodiments, the measured functional parameter is compared to desired values and the interface module decides whether the measured functional parameter is at a desired range at <NUM>. In some embodiments, if the measured functional parameter is not at a desired range, the interface module delivers an alert signal to the user at <NUM>. In some embodiments, the alert to the user comprises information regarding the parameters tested and/or the parameters that are not in a desired range. In some embodiments, the alert is presented on a screen connected to the interface module or is delivered to a handheld device of a user, optionally via a wireless signal.

According to some exemplary embodiments, the interface module delivers an alert to an expert for example a physician who is not in a close proximity to the user at <NUM>. In some embodiments, the alert to the expert comprises information regarding the parameters tested and/or the parameters that are not in a desired range. Optionally, the alert to the expert comprises additional parameters regarding the treatment plan, for example when is the next scheduled treatment session, what is the current position of the linear actuators and/or the distance or the relative distance between the rings of the bone fixation device.

In some embodiments, the expert delivers instructions to the user following the alert. In some embodiments, the instructions delivered to the user comprise suggested clinical procedures for example performing clinical tests and/or suggested modifications of the treatment plan, for example re-scheduling of at least one treatment session. In some embodiments, following the alert delivered to the expert at <NUM>, the expert modifies the treatment plan stored in the interface module memory by a wireless signal transmitted to the interface module. In some embodiments, after an alert was delivered to the expert at <NUM>, the interface module moves to a standby state before the beginning of the next scheduled treatment session.

According to some exemplary embodiments, if the results are at a desired range at <NUM>, then the interface module determines the desired protocols step. In some embodiments, the desired protocol step is a pre-determined treatment protocol step that was inserted to the interface module at protocol setup <NUM>. Alternatively, the protocol step is determined based on the measurements performed at <NUM>. Optionally, pre-determined parameters of the protocol step are modified according to the measurements results.

According to some exemplary embodiments, once a protocol step is determined at <NUM>, an alert is delivered to a user before the movement of at least one linear actuator at <NUM>. In some embodiments, if the interface module is connected to motorized linear actuators, for example motorized struts then the interface module moves the linear actuator to a desired extension length at <NUM>. Alternatively, if the interface module is connected to non-motorized linear actuators, then the interface module monitors the manually movement of the linear actuators by the user of the bone fixation device. Optionally, the interface module delivers instructions to the user how to manually move the linear actuators to a desired extension length. In some embodiments the instructions are delivered to the user using a screen connected to the interface module and/or using a handheld device of the user.

According to some exemplary embodiments, after the linear actuators have moved, the treatment session parameters are stored in the interface module memory at <NUM>. In some embodiments, the treatment session parameters comprise movement duration, the relative extension length or the extension length of each linear actuator, and/or the distance or the change in distance and/or the angle between the two rings of the bone fixation device, after the movement. Optionally, treatment session parameters comprise treatment feedback input parameters received from the user, for example parameters regarding to pain sensed by the user.

According to some exemplary embodiments, the interface module transmits an alert to the user when the treatment session is completed at <NUM>. In some embodiments, the interface module transmits an indication to the user with the time of the next treatment session and/or the time remaining to the next treatment session at <NUM>.

According to some exemplary embodiments, after the treatment session is completed, the interface module delivers a summarizing report to the expert and/or to the user at <NUM>. In some embodiments the report comprises user compliance with the treatment session and/or log files of the bone fixation device and/or parameters measured by the interface module. In some embodiments the report is transmitted to a computer or a handheld device of the expert or the user.

According to some embodiments, an interface module is connected to bone fixation device comprising at least one motorized linear actuator or at least one manually operated linear actuator. In some embodiments, the interface module monitors the movement of at least one linear actuator, and/or the extension length of at least one linear actuator. In some embodiments, the interface module monitors the distance and/or the angle between the rings of a bone fixation device. Optionally, the interface module moves the linear actuators by controlling the motors used to move the linear actuators.

Reference is now made to <FIG> depicting an interface module connected to motorized linear actuators of a bone fixation device, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module <NUM> comprises at least one linear actuator connector <NUM> configured to be connected via wires or flexible connectors to at least one motorized linear actuator <NUM> of a bone fixation device. In some embodiments, linear actuator connector <NUM> is connected to a control circuitry <NUM> of interface module <NUM>, which controls the activation of motorized linear actuator <NUM>. In some embodiments, control circuitry <NUM> controls and/or monitors the operation of the linear actuator motor and/or the linear actuator battery <NUM> connected to the motorized linear actuator. In some embodiments, control circuitry <NUM> controls and/or monitors the power supply of battery <NUM> to motorized linear actuator <NUM>.

In some embodiments, interface module <NUM> further comprises an interface circuitry <NUM> for transmitting indications and/or alerts to a user of the bone fixation device. In some embodiments, when motorized linear actuator <NUM> is connected to linear actuator connector <NUM>, control circuitry <NUM> delivers an indication on the connection to the user by interface circuitry <NUM>. In some embodiments, interface circuitry <NUM> comprises a light emitting component and/or a sound producing component for delivering the alerts and/or indications to the user. In some embodiments, each linear actuator connection produces a different indication by interface <NUM>. Optionally, an indication is generated by interface <NUM> when motorized linear actuator <NUM> moves. In some embodiments, the indication is vibration.

In some embodiments, interface module <NUM> further comprises an interface module power supply <NUM> connected to control circuitry <NUM>, for the supply of electric energy to interface module <NUM> components. In some embodiments, the interface module power supply can be detached from the interface module to allow, for example its replacement or recharging using an external power source. In some embodiments, the interface module power supply is a rechargeable battery, for example a lithium-ion battery. In some embodiments, control circuitry <NUM> delivers an alert to the user when interface module power supply is discharged.

In some embodiments, the interface module comprises at least one sensor, for example sensor <NUM>. In some embodiments sensor <NUM> measures the body temperature of the patient, for example the body temperature at the fracture area. In some embodiments, sensor <NUM> comprises an accelerometer to measure the relative position and/or orientation of the interface module. In some embodiments, sensor <NUM> transmits sensed parameters values to control circuitry <NUM> which optionally can deliver an indication to the user through interface <NUM>, for example when sensed values are not in a desired range.

In some embodiments, the interface module receives a wireless signal from at least one sensor connected to the knee and/or to the ankle adjacent to the bone fixation device. Alternatively, the signal is delivered to the interface module by wires connected to the sensor. In some embodiments, the sensor connected to the ankle and or to knee measures the range of motion of the ankle and/or the range of motion of the knee, respectively.

Reference is now made to <FIG> depicting an interface module connected to a manual linear actuator of a bone fixation device, according to some embodiments of the invention.

According to some exemplary embodiments, interface module <NUM> comprises at least one linear actuator connector <NUM> configured to be connected to a manual linear actuator <NUM> of a bone fixation device. In some embodiments, when manual linear actuator <NUM> is connected and/or when it moves linear actuator connector <NUM> delivers a signal to control circuitry <NUM> of the interface module. Optionally, when control circuitry <NUM> receives a signal from linear actuator connector <NUM> it delivers an alert and/or an indication to a user of the bone fixation device via interface <NUM>. In some embodiments, the indication comprises vibration.

Reference is now made to <FIG> depicting an interface module connected to a motorized linear actuator, where the battery of the motorized linear actuator is part of the interface module, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module for example interface module <NUM> comprises linear actuator battery <NUM>. In some embodiments, a motorized linear actuator, for example motorized linear actuator <NUM> is connected to interface module <NUM> via a linear actuator connector <NUM> and also electrically connected to linear actuator battery <NUM> of interface module <NUM>. Alternatively, motorized linear actuator <NUM> is connected to linear actuator connector <NUM> which also delivers electrical power to the linear actuator from linear actuator battery <NUM>. Optionally, the interface module power supply <NUM> delivers electric power to the interface module and to the motorized linear connector <NUM>. In some embodiments, interface module <NUM> and/or linear actuator battery <NUM> can be detached from the interface module to allow, for example electrical recharging by an external power source. In some embodiments, combining the linear actuator battery within an optionally detachable interface module allows, for example to reduce the weight applied on the limb of the patient.

Reference is now made to <FIG> depicting an interface module comprising at least one linear actuator battery and at least one linear actuator motor for controlling and moving a manual linear actuator of a bone fixation device, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module, for example interface module <NUM> comprising at least one linear actuator battery <NUM>, at least one linear actuator motor <NUM>, and at least one linear actuator connector <NUM>. In some embodiments, at least one manual linear actuator, for example manual linear actuator <NUM> of a bone fixation device is connected via wires and/or connectors to linear actuator connector <NUM> of interface module <NUM> and to linear actuator motor <NUM>. In some embodiments, at least one linear actuator battery, for example linear actuator battery <NUM> is connected to linear actuator motor <NUM>. In some embodiments, linear actuator battery <NUM> provides electrical power to linear actuator motor <NUM> to allow, for example the movement of manual linear actuator <NUM>. In some embodiments, control circuitry <NUM> of interface module <NUM> receives a signal from linear actuator connector <NUM> and/or from linear actuator <NUM> when manual linear actuator <NUM> is connected and/or moves. Optionally, when control circuitry <NUM> receives a signal that linear actuator <NUM> is connected and/or that it moves, it delivers an alert and/or an indication to the user via interface circuitry <NUM>.

According to some exemplary embodiments, the interface module comprises housing for example housings <NUM>, <NUM>, <NUM> or <NUM> with holes and/or windows to allow, for example the connection of at least one linear actuator to the interface module. In some embodiments, the holes and/or windows of the housing allow, for example to visualize alerts and/or indications delivered to the user of the bone fixation device.

Reference is now made to <FIG> depicting a fully- circular interface module and a semi-circular interface module, respectively, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module, for example interface module <NUM> comprises a full circular housing <NUM>. In some embodiments, the fully-circular interface module is. Alternatively, an interface module, for example interface module <NUM> comprises a semi-circular housing <NUM>. In some embodiments, semi-circular housing subtends an angle of at least <NUM> degrees. In some embodiments, the interface module comprises an arc-shaped housing. In some embodiments, the arc-shaped housing subtends an angle of at least <NUM> degrees, for example <NUM> degrees. In some embodiments, the arc -shaped housing subtends an angle in the range of <NUM>-<NUM> degrees, <NUM>-<NUM> degrees or <NUM>-<NUM> degrees.

In some embodiments, the interface module or the interface module housing has an internal diameter of at least <NUM>, for example <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM>.

In some embodiments, an interface module for example interface modules <NUM> and <NUM> comprise at least one linear actuator connector <NUM>, for example <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> linear actuator connectors. In some embodiments, each linear actuator connector is connected to at least one linear actuator, for example <NUM> linear actuators. In some embodiments, each linear actuator connector <NUM> comprises two connector inputs <NUM> to connect two linear actuators to the interface module. In some embodiments, each of the connector inputs is uniquely tagged to match a single selected connector of a linear actuator to allow, for example an accurate and easy connection by a user of the device between a selected linear actuator to a selected connector input. Optionally, each of the connector inputs is uniquely color coded to match a color coded connector of a selected linear actuator.

According to some exemplary embodiments, the interface module for example interface modules <NUM> and <NUM> comprise at least <NUM> connector circuitries, with at least <NUM> connector inputs for connecting at least <NUM> linear actuators of a bone fixation device to the interface module.

In some embodiments, when a linear actuator is connected to at least one of connector inputs <NUM>, a LED <NUM> emits light. Optionally, LED <NUM> emits light with a different wave length for example a green light or a red light to indicate when an actuator is properly connected to the interface module or not properly connected, respectively.

According to some exemplary embodiments, interface modules <NUM> and <NUM> comprise an interface module power supply <NUM>, to provide electrical power to the interface module components. In some embodiments, an external charger can be connected to power supply <NUM> through charger input <NUM>, to allow, for example charging of the battery. Alternatively, the power supply is detached from the rest of the interface module for recharging of the battery. Optionally, the interface module is detached from the bone fixation device, for recharging of the power supply <NUM> and to reduce the weight applied on the limb of the patient.

According to some exemplary embodiments, interface modules <NUM> and <NUM> comprise at least one sensor <NUM> and at least one communication circuitry <NUM>. In some embodiments, sensor <NUM> senses clinical parameters of the patient, for example body temperature. Alternatively, at least one sensor senses at least one functional parameter, for example the position and/or orientation of the interface module. In some embodiments, communication circuitry <NUM> comprises a receiver circuitry and a transmitter circuitry for sending and receiving information between the interface module and other computers and/or handheld devices.

According to some exemplary embodiments, interface modules <NUM> and <NUM> comprise a control circuitry <NUM> connected to all other components of the interface modules by wiring <NUM> which passes in the inner lumen of the interface modules housing. In some embodiments, interface modules <NUM> and <NUM> comprise an emergency switch or an emergency button <NUM>. In some embodiments, a user of the bone fixation device stops the operation of the linear actuators connected to the interface module by pressing the emergency button. In some embodiments, when emergency button <NUM> is pressed, control circuitry <NUM> signals the linear actuators connected to the interface module by linear actuator connectors, for example linear actuator connector <NUM> to stop their movement. Optionally, when the emergency button is pressed, control circuitry <NUM> signals communication circuitry <NUM> to send an alert signal and/or an indication to an expert.

In some embodiments, control circuitry <NUM> is connected to a light emitting component <NUM>, for example a LED indicator and/or to a sound producing component <NUM>, for example a buzzer or a speaker.

Reference is now made to <FIG> depicting interface module components, according to some embodiments of the invention,.

According to some exemplary embodiments, an interface module, for example interface module <NUM> comprises linear actuator connector <NUM>. In some embodiments, motorized linear actuator <NUM> is connected to the interface module via connector <NUM>. In some embodiments, when a linear actuator is connected to the interface module, a control circuitry <NUM> receives a signal from linear actuator connector <NUM>. In some embodiments, a linear actuator identification circuitry <NUM> is configured to identify whether the correct linear actuator is connected to the correct linear actuator connector, for example linear actuator connector <NUM>. In some embodiments, if the correct linear actuator is connected, then control circuitry <NUM> delivers a positive indication signal to the user via at least one interface circuitry <NUM>, for example by lighting a green LED indicator. In some embodiments, if the wrong linear actuator is connected then control circuitry <NUM> delivers a negative indication signal to the user via interface circuitry <NUM>, for example by lighting a red LED indicator and/or by producing a sound. In some embodiments, the indication provided by interface circuitry <NUM> comprises vibration.

According to some exemplary embodiments, interface circuitry <NUM> comprises at least one microphone and at least one speaker. In some embodiments, a user of the bone fixation device communicates with an expert, for example a physician via the speaker and the microphone. In some embodiments, the expert delivers instructions to the user, for example when the interface module stops the movement of the bone fixation device using the speaker and the microphone. In some embodiments, the user provides feedback, for example a pain indication to the expert, using the speaker and the microphone.

According to some exemplary embodiments, motorized linear actuator <NUM> receives electrical power from interface module <NUM> by connecting a linear actuator power connector <NUM> of the interface module. In some embodiments, linear actuator power connector delivers electrical power to the linear actuator from a linear actuator battery <NUM>, which is a rechargeable battery for example a lithium ion battery.

According to some exemplary embodiments, interface module <NUM> receives electrical power from battery <NUM>, which is a rechargeable battery. In some embodiments, battery <NUM> and/or linear actuator battery <NUM> are configured to be detached from the interface module to allow, for example their charging, for example by an external charger. In some embodiments, interface module <NUM> further comprises a backup battery connected to control circuitry <NUM>, to provide electric power to the control circuitry when battery <NUM> is recharged and/or when it is detached from the interface module. In some embodiments, backup battery <NUM> is a rechargeable battery, for example a lithium ion battery. In some embodiments, when battery <NUM> is attached connected to the interface module, it charges backup battery <NUM>.

In some embodiments, control circuitry <NUM> signals interface circuitry <NUM> to generate an indication when battery <NUM> is at least <NUM>% discharged, for example <NUM>% discharged, <NUM>% discharged, <NUM>% discharged, <NUM>% discharged, or <NUM>% discharged.

According to some exemplary embodiments, control circuitry <NUM> is connected to a receiver circuitry <NUM> and/or to a transmitter circuitry <NUM> to allow, for example receiving and sending information to a computer and/or a handheld device. In some embodiments, when a user presses an emergency button, for example emergency button <NUM>, the control circuitry transmits an alert signal and/or an indication to an expert via transmitter circuitry <NUM>. In some embodiments, transmitter circuitry transmits a wireless signal, for example a Wi-Fi signal, a Bluetooth signal or a cellular signal to a computer and/or a handheld device of an expert. In some embodiments, an expert can deliver instructions to the user and/or updates for example updates of the patient's treatment protocol through receiver circuitry <NUM>.

In some embodiments, control circuitry <NUM> reads and/or writes information into memory circuitry <NUM> which stores interface module setup parameters and/or parameters of the patient's treatment plan. In some embodiments, memory circuitry <NUM> stores log files of the interface module or the bone fixation device connected to the interface module.

According to some exemplary embodiments, interface module <NUM> comprises a camera <NUM>. In some embodiments, camera <NUM> measures visual information regarding the healing process, for example, camera <NUM> monitors the tissue color at the fracture area. In some embodiments, camera <NUM> delivers visual information of the patient and/or the bone fixation device to an expert, for example a physician.

According to some exemplary embodiments, interface module <NUM> further comprises at least one sensor <NUM> configured to measure at least one functional or clinical parameter value affected by the healing process of the fractured bone connected to the bone fixation device, for example body temperature and/or motion. In some embodiments, sensor <NUM> measures the body temperature of the limb in the fracture area. In some embodiments, higher than normal body temperature values indicate are indicators of an inflammation process at the fracture area.

In some embodiments, sensor <NUM> measures at least one motion-related parameter of the limb, for example motion and/or range of motion and/or acceleration. In some embodiments, sensor <NUM> measures the position and/or orientation of the limb connected to the bone fixation device to monitor the range of motion of the limb and/or the range of motion of a joint adjacent to the limb.

In some embodiments, sensor <NUM> measures the color of the tissue at the fractured area. In some embodiments, the color of the tissue at the fractured area provides an indication to the healing process.

In some embodiments, if the measured functional parameter is not in a desired range of values then an indication is provided to the user and/or to an expert, for example by interface circuitry <NUM>. Optionally, if the measured functional parameter is not in a desired range of values then control circuitry <NUM> stops the movement of motorized linear actuator <NUM>.

In some embodiments, control circuitry <NUM> is connected to a pain indicator <NUM>. In some embodiments, a user of the bone fixation device provides a pain indication regarding the pain level during and/or after a treatment session using pain indicator <NUM>. In some embodiments, if the pain level is higher than a pre-determined value, control circuitry <NUM> delivers an indication to an expert using transmitter circuitry <NUM>. Optionally, if the pain level is higher than a pre-determined value, the control circuitry stops the operation of the linear actuators connected to the interface module.

According to some exemplary embodiments, the interface module, for example interface module <NUM> comprises at least one force sensor. In some embodiments, the force sensor measures the force applied by at least one linear actuator, for example a strut on the two rings connected to the strut and/or on the limb connected to the bone fixation device. In some embodiments, the force sensor measures a force in the range of <NUM> - <NUM>, <NUM>-<NUM>, <NUM>-<NUM> or <NUM>-<NUM>. In some embodiments, the maximal force that can be applied on the rings connected to the linear actuator or on the limb is in the range of <NUM>-<NUM>, for example <NUM>. In some embodiments, when the applied force is larger than the maximal force, an indication is provided to the user and/or to an expert. In some embodiments, the maximal force alert indication is an alert signal.

In accordance with the invention, the interface module, for example interface module <NUM> comprises at least one current sensor. The current sensor measures the current of at least one linear actuator of the bone fixation device. In some embodiments, if the measured current is not in a desired range of currents, an alert signal is delivered to the user and/or to an expert, for example a physician. If the measured current is not in a desired range of currents the interface module stops the movement of the bone fixation device. The measured current provides an indication to the force and/or torque applied by the linear actuator.

According to some exemplary embodiments, control circuitry <NUM> stops the movement of at least one linear actuator, for example a strut of a bone fixation device when battery <NUM> is at least <NUM>% discharged, for example <NUM>% discharged, <NUM>% discharged, <NUM>% discharged or <NUM>% discharged. Alternatively or additionally, control circuitry <NUM> stops the movement of at least one linear actuator, for example a strut of a bone fixation device when over current is detected and/or when an emergency switch or an emergency button, for example emergency button <NUM> is pressed.

According to some exemplary embodiments, the electrical circuitry, for example interface module <NUM> or interface module <NUM> or interface module <NUM> has a weight in the range of <NUM>-<NUM> gram, <NUM>-<NUM> gram, <NUM>-<NUM> gram, <NUM>-<NUM> gram, <NUM>-<NUM> gram.

According to some embodiments, an interface module is configured to be connected to the upper ring of a bone fixation device, and optionally to at least one linear actuator for example a strut of the bone fixation device. Reference is now made to <FIG> depicting an interface module connected to the upper ring of a bone fixation device, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module <NUM> is connected to an upper ring <NUM> of a bone fixation device <NUM>. In some embodiments, bone fixation device <NUM> comprises the upper ring <NUM>, and a lower ring <NUM> both connected by at least two linear actuators, for example struts <NUM> and <NUM>. In some embodiments, upper ring <NUM> and lower ring <NUM> are connected to a bone <NUM> via at least two connecting shafts, for example connecting shafts <NUM> and <NUM>. In some embodiments, the upper and lower ring are connected to the bone with <NUM>, <NUM>, or <NUM> connecting shafts. In some embodiments, the connecting shafts are inserted through multiple layers of the body, for example the skin and the muscle, until they are inserted into the bone.

In some embodiments, the upper and/or lower rings of a bone fixation device have a circular shape, a semi-circular shape or an arc shape. In some embodiments, the semi-circular ring of a bone fixation device subtends an angle of at least <NUM> degrees. In some embodiments, the arc-shaped ring of the bone fixation device subtends an angle of at least <NUM> degrees, for example <NUM> degrees. In some embodiments, each arc-shaped ring of a bone fixation device subtends an angle in the range of <NUM>-<NUM> degrees, <NUM>-<NUM> degrees or <NUM>-<NUM> degrees.

According to some exemplary embodiments, the interface module is connected to a ring of a bone fixation device via at least one connecting member, for example <NUM>, <NUM>, or <NUM> connecting members. In some embodiments, interface module <NUM> is connected to the upper ring <NUM> via at least one connecting member <NUM>. In some embodiments, at least part of the interface module is attached and detached from the ring using connecting member <NUM>.

According to some exemplary embodiments, the linear actuators of the bone fixation device, for example struts <NUM> and <NUM> are connected to the interface module <NUM>, by a mechanical and/or electrical connection, for example connection <NUM>. In some embodiments, the struts are connected to the interface module by a flexible connector and/or an electrical wiring. Optionally, the linear actuators of the bone fixation device, for example struts <NUM> and <NUM> are mechanically and/or electrically connected via pins <NUM> and <NUM> to the interface module. Additionally, in some embodiments, interface module <NUM> is attached and detached from bone fixation device <NUM> by pins <NUM> and <NUM>.

Reference is now made to <FIG> depicting a fully-circular, and a semi-circular interface modules connected to a bone fixation device, according to some embodiments of the invention.

According to some exemplary embodiments, a fully-circular interface module <NUM> or a semi-circular interface module <NUM> is connected to a bone fixation device <NUM>. In some embodiments, bone fixation device comprises a lower ring <NUM> and an upper ring <NUM>, with at least <NUM> linear actuators, for example <NUM> linear actuator connecting lower ring <NUM> and upper ring <NUM>. In some embodiments, the interface module, for example interface module <NUM> or <NUM> is connected to upper ring <NUM> by threaded means. Alternatively, the interface module is connected to upper ring <NUM> by a connection member configured for detachment and re-attachment of the interface module or a part of the interface module.

According to some exemplary embodiments, after the interface module is connected to the upper ring, each linear actuator of the bone fixation device, for example liner actuator <NUM> is connected to a linear actuator connector <NUM> of the interface module via a connector, for example flexible connector <NUM> and/or via wiring, for example wiring <NUM>. In some embodiments, flexible connector <NUM> and/o wiring <NUM> are tagged with a specific tag. In some embodiments, the specific tag allows, for example to match flexible connector <NUM> with a single selected connector input for example connector input <NUM>. Optionally each connector input and each connector and/or wiring are color coded to allow, for example easy matching between a selected connector and/or wiring of a linear actuator and a selected connector input of an interface module. In some embodiments, if the correct connector and/or wiring is connected to the matched connector input, an indication is delivered by a light emitting component, for example LED indicator <NUM> and/or by a sound producing component, for example buzzer <NUM>.

According to some exemplary embodiments, a semi-circular interface module is connected to a bone fixation device with semi-circular upper and lower rings.

According to some exemplary embodiments, for example as shown in <FIG>, the linear actuators of the bone fixation device, for example bone fixation device <NUM>, connect the lower ring <NUM> with the upper ring <NUM>. In some embodiments, the linear actuators, for example linear actuator <NUM>, are color coded to allow, for example their connection to a selected connector of the interface module. In some embodiments, marking each linear actuator with a unique marking that matches a marked connector of the interface module allows for example, a user of the bone fixation device to accurately connect the linear actuator to the correct connecter. According to some exemplary embodiments, the linear actuators of the bone fixation device, for example linear actuator <NUM> are connected by a mechanical and/or an electrical connection to the interface module. In some embodiments, the linear actuators are connected by a connector, for example flexible connector <NUM> which is inserted into a connector input, for example connector input <NUM> of the interface module. Optionally, the connection between the linear actuators and the interface module comprise electrical wiring, for example wiring <NUM>.

According to some exemplary embodiments, each of the linear actuators and/or their connectors is color coded with a matching color to a color coded connector input of the interface module. In some embodiments, the upper part of <NUM> of linear actuator <NUM> is color coded with a matched color of a selected connector input of the interface module, for example connector input <NUM>. Optionally, flexible connector <NUM> of linear actuator <NUM> is color coded with the same color as connector input <NUM>.

According to some exemplary embodiments, an interface module has a larger diameter than the ring of the bone fixation device. In some embodiments, the larger diameter interface module comprises at least two connecting inputs in its lower surface, facing the ring, to allow, for example at least one mechanical and/or electrical connection to the upper section of the linear actuators of the bone fixation device.

According to some exemplary embodiments, an interface module is positioned on a bone fixation device that is connected to a bone, for example a fractured bone.

Reference is now made to <FIG> depicting a bone fixation device with an interface module connected to a bone, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module connected to a bone fixation is configured to measure at least one motion-related parameter, for example the motion and/or range of motion and/or the acceleration of a limb connected to the bone fixation device. Optionally, the interface module measures the motion and/or ranges of motion and/or acceleration of the joint adjacent to the bone fixation device, for example a knee joint or an ankle. In some embodiments, measuring at least one motion-related parameter of the limb and/or the joint allows, for example, to monitor the progression of the healing process of the fractured bone. Optionally, if the at least one motion-related parameter is not in a desired range, then the treatment protocol or at least one treatment parameter is modified.

According to some exemplary embodiment, a bone fixation device, for example bone fixation device <NUM> is connected to bone <NUM>. In some embodiments, interface module <NUM> is connected to the upper ring of bone fixation device <NUM>. In some embodiments, interface module <NUM> comprises at least one sensor and/or component, for example a tilt sensor and/or an accelerometer and/or a gyroscope for measuring the angle and/or the acceleration of the interface module. Optionally, the at least one sensor and/or component measures the movement of the limb connected to the bone fixation device, for example during walking or when the limb moves. In some embodiments, when bending the knee <NUM> in direction <NUM>, an angle <NUM> is formed between the upper and the lower bones of leg <NUM>, as shown in <FIG>. In some embodiments, when angle <NUM> is formed, a sensor or a component in interface module <NUM> senses the change in the position and/or the orientation of the interface module and measures the range of motion <NUM> between the position and/or orientation of the interface module before and after the bending of the knee. In some embodiments, the measured range of motion is transmitted by the interface module to a computer and/or to a handheld device of a remote expert, for example a physician for monitoring purposes. In some embodiments, the range of motion of the knee is in the range of <NUM>-<NUM> degrees.

Reference is now made to <FIG> depicting a bone fixation device configured to measure at least one motion parameter of an ankle, according to some embodiments of the invention.

According to some exemplary embodiments, interface module <NUM> measures at least one parameter related to the motion and/or range of motion and/or acceleration of ankle <NUM> using at least one sensor connected to the interface module and/or at least one component of the interface module. In some embodiments, interface module <NUM> measures the range of motion of ankle <NUM> in direction <NUM> in the range of <NUM>-<NUM> degrees, <NUM>-<NUM> degrees or <NUM>-<NUM> degrees. In some embodiments, interface module <NUM> measures the range of motion of ankle <NUM> in direction <NUM> in the range <NUM>-<NUM> degrees, <NUM>-<NUM> degrees, or <NUM>-<NUM> degrees. In some embodiments, interface module <NUM> compares the at least one measured motion-related parameter to a desired value for each treatment session and/or for each treatment day. In some embodiments if the measured motion-related parameter is not in a desired range of values, an indication is delivered to the user and/ or to an expert, for example a physician by the interface module.

According to some exemplary embodiments, interface module <NUM> receives a wireless signal from at least one sensor <NUM> connected to the limb, for example as shown in <FIG>. In some embodiments, sensor <NUM> is connected to the ankle or to the knee. In some embodiments, sensor <NUM> measures the motion and/or range of motion and/or acceleration of the limb. In some embodiments, sensor <NUM> is connected to interface module <NUM> by wires.

In some embodiments, the interface module measures the motion of the limb connected to the bone fixation device over time, and determines whether the measured motion is according to the treatment plan. In some embodiments, if the measured motion of the limb is not according to the treatment plan, then the interface module changes at least one parameter of the treatment protocol.

In some embodiments, the patient presses a button of the interface module before starting the movement measurement. In some embodiments, he moves the limb according to instructions received from the interface module and/or from an expert. In some embodiments, when the patient finishes moving his limb, he presses a button on the interface module. In some embodiments, the interface module delivers an indication to the user and/or to an expert regarding the movement results. In some embodiments, the measured movement parameters are stored in a memory of the interface module. In some embodiments, the stored movement parameters are transmitted to an expert, for example a physician. In some embodiments, the movement of the limb is measured by an accelerometer of the interface module or connected to the interface module.

In some embodiments, measuring at least one motion-related parameter of the limb by the interface module allows, for example, to monitor the healing process of the fractured bone by a physician. Optionally, the physician modifies the treatment plan, based on the measured motion-related parameter, for example by sending an updated treatment protocol to the interface module.

Reference is now made to <FIG> depicting different formations of an interface module, according to some embodiments of the invention. According to some exemplary embodiments, an interface module is connected to one of the rings of a bone fixation device, for example to the upper ring. In some embodiments, an interface module, for example interface module <NUM> has a semi-circular shape and is connected to the upper ring <NUM> of a bone fixation device <NUM>. In some embodiments, the semi-circular shape of interface module <NUM> allows, for example, the connection of <NUM> linear actuators of bone fixation device <NUM>.

In some embodiments, an interface module, for example interface module <NUM> has an arc shape that allows the connection of at least <NUM> linear actuator, for example <NUM> linear actuators of bone fixation device <NUM>. In some embodiments the arc shape subtends an angle of at least <NUM> degrees, for example <NUM>, <NUM>, <NUM>, <NUM>, <NUM> degrees. In some embodiments, the arc shape subtends an angle in the range of <NUM>-<NUM> degrees, <NUM>-<NUM> degrees or <NUM>-<NUM> degrees. In some embodiments, interface module <NUM> is not connected to the linear actuators and comprises at least one sensor and an interface circuitry for monitoring at least one functional parameter of the patient. Optionally, if interface module <NUM> is connected to at least one linear actuator of the bone fixation device, a user of the device can move the interface module to different positions on ring <NUM> to allow, for example, the connection of interface module <NUM> to all the linear actuators of the bone fixation device.

In some embodiments, an interface module, for example interface module <NUM> has a fully-circular shape which allows, for example, the connection of all the linear actuators of bone fixation device <NUM> to the interface module. In some embodiments, an interface module, for example interface module <NUM> comprises a plurality of spaced apart segments. In some embodiments, each segment of interface module <NUM> is connected to the at least one linear actuator of bone fixation device <NUM>.

According to some exemplary embodiments, interface modules that have a semi-circular or a segmented formation allow easy removal of the interface module or at least a part of the interface module from the leg of the patient.

Reference is now made to <FIG> depicting an interface module connected to a linear actuator of a bone fixation device, according to some embodiments of the invention.

According to some exemplary embodiments, a circuitry, for example an interface module <NUM> or <NUM> is connected to a linear actuator, for example strut <NUM> of a bone fixation device <NUM>. In some embodiments, interface module <NUM> or <NUM> is connected to strut <NUM> via at least one attachment and/or detachment member <NUM>. In some embodiments, attachment and/or detachment member <NUM> is configured to allow, for example, easy attachment and detachment from strut <NUM>.

In some embodiments, the interface module has a shape of a box, for example interface module <NUM> as shown in <FIG>. Alternatively, the interface module has a cylindrical shape, for example interface module <NUM> as shown in <FIG>.

In some embodiments, interface module <NUM> or <NUM> is electrically connected to strut <NUM> via wire <NUM>. Alternatively, the interface module is electrically connected to the strut via a direct connection between at least one electric board of the interface module and at least one electric board of the strut.

According to some embodiments, each strut of a bone fixation device is connected to an interface module. In some embodiments, each interface module controls and/or monitors the movement of the strut connected to it. Optionally or additionally, the interface modules connected to the bone fixation device synchronize the movement of the struts by synchronizing the operation of the interface modules, for example using a synchronization protocol stored in at least one of the interface modules. In some embodiments, each interface module is connected to another interface module by at least one wire or by wireless means.

In some embodiments, an interface module is moved from one strut to another. In some embodiments, the movement of the interface module from one strut to another is according to an operation protocol stored in the interface module and/or to an operation protocol delivered to the user.

According to some embodiments, an interface module comprises an interface panel with at least one indication component, for example a light emitting component and at least one input component, for example a switch or a button. Reference is now made to <FIG> depicting an interface panel of an interface module, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module for example interface module <NUM> comprise tagged connector circuitries, for example color-coded connector circuitries. In some embodiments, the tagged connector circuitries allow matching a single selected linear actuator to a single selected linear actuator connector or a connector input. In some embodiments, the tagged connectors allow easy and accurate connection of a specific linear actuator to a specific connector by a user of the interface module.

According to some exemplary embodiments, interface module <NUM> comprises an interface panel <NUM> which further comprises a plurality of indicators and input means for example selector switches <NUM> and <NUM>. In some embodiments, the interface panel, for example interface panel <NUM>, comprises an indicator, for example a LED indicator <NUM> for each linear actuator, for example a strut which is connected to the interface module. In some embodiments, LED indicator <NUM> allows to monitor the connection of the linear actuator to the interface module and/or the function of the linear actuator. In some embodiments, interface panel <NUM> comprises an input panel <NUM> for each linear actuator. In some embodiments, input panel <NUM> allows adjusting the operation of each linear actuator by the user.

In some embodiments, interface panel <NUM> comprises a battery indicator, for example to battery indicator <NUM> to indicate the charging level of the interface module battery, for example interface module power supply <NUM>. In some embodiments, when the interface module battery is discharged, battery indicator emits light to alert the user. In some embodiments, interface panel <NUM> comprises a communication indicator <NUM> which provides an indication when the interface module is communicating with an external computer or a handheld device. In some embodiments, communication indicator <NUM> delivers an indication to the user when the interface module is connected to a communication network, for example a Wi-Fi network.

In some embodiments, interface panel <NUM> comprises an emergency input component, for example an emergency button <NUM>. In some embodiments, a user of the bone fixation device stops the operation of the linear actuators by pressing the emergency button <NUM>, for example when the user feels pain during the treatment session.

According to some exemplary embodiments, an interface module comprises at least one connection member to allow its connection or attachment to a ring of a bone fixation device. In some embodiments, the connection member allows the attachment and detachment of at least part of the interface module, for example the interface module battery. In some embodiments, attachment of the battery allows recharging of the battery. Reference is now made to <FIG>, depiction connection members of an interface module, according to some embodiments of the invention.

According to some exemplary embodiments, an interface module, for example interface module <NUM> comprises at least one bore <NUM>, optionally with inside threading for connection of the interface module to a ring of a bone fixation device by a bolt or a screw. In some embodiments, for example as shown in <FIG>, a bolt <NUM> is inserted through a hole <NUM> in a ring <NUM>, and into bore <NUM> of interface module <NUM>. In some embodiments, bolt <NUM> is turned within bore <NUM> threading for connection of interface module <NUM> to ring <NUM>. In some embodiments, an interface module comprises at least one bore, for example <NUM>, <NUM>, <NUM>, or <NUM> bores for connection of the module to a ring which comprises at least one hole.

According to some exemplary embodiments, an interface module, for example interface module <NUM> comprises at least one elongated connection member <NUM>, optionally with external threading, extending from the interface module on the side of the interface module facing a ring of a bone fixation device. In some embodiments, the length of connection member <NUM> allows it to penetrate through a hole <NUM> in a ring of a bone fixation device, and to be fastened by a fastening member, for example nut <NUM> which is turned on the external threading of connection member <NUM>. In some embodiments, fastening of connection member <NUM> allows a stable connection between the interface module and the ring.

According to some embodiments, an electrical circuitry is attached or detached from a ring of a bone fixation device. Reference is now made to <FIG> depicting attachment and detachment of an electrical circuitry, according to some embodiments of the invention.

According to some exemplary embodiments, an electrical circuitry for example interface module <NUM> comprises a fixed part connected to a bone fixation device, for example fixed part <NUM> and a detachable part connected to fixed part <NUM>, for example detachable part <NUM>. In some embodiments, fixed part <NUM> comprises at least two linear actuator connectors, for example linear actuator connectors <NUM>, and at least two connection member. In some embodiments, one connection member out of the at least two connection members is for connecting fixed part <NUM> to a ring of a bone fixation device, and a second connection member for connecting the fixed part to detachable part <NUM>. In some embodiments, the connection member between the detachable part and the fixed part is designed to allows, for example easier separation between the detachable part and the fixed part compared to the connection member between the fixed part and the bone fixation device.

In some embodiments, linear actuator connectors <NUM> of the fixed part <NUM> are inserted into sockets <NUM> of detachable part <NUM>. Optionally, sockets <NUM> and/or linear actuator connectors <NUM> are designed to have a similar shape and size to allow for example easy insertion of linear actuator connectors <NUM> into sockets <NUM>.

In some embodiments, detachable part <NUM> comprises at least one connecting members, for example elongated shaft <NUM> fitted to be inserted into bore <NUM>, to allow, for example, the connection of detachable part <NUM> to fixed part <NUM>. In some embodiments, the detachable part, for example detachable part <NUM> comprises at least one component of the interface module configured to be connected to an external device, for example battery <NUM>, which can be recharged by connecting an external charger to charging connector <NUM>. In some embodiments, the connection members between fixed part <NUM> and detachable part <NUM> are asymmetrically distributed on detachable part <NUM> and fixed part <NUM> or asymmetrically designed. In some embodiments, the asymmetrically distribution and/or design allows, for example, a single desired attachment option between detachable part <NUM> and fixed part <NUM>.

According to some exemplary embodiments, an interface module, for example as shown in <FIG> interface module <NUM> comprises a fixed part <NUM>, and a detachable part <NUM> which comprises battery <NUM>. In some embodiments, detaching battery <NUM> from fixed part <NUM> allows, for example, its replacement or its connection to an external charger.

In some embodiments, the detachable part comprises less than <NUM>%, for example <NUM>% of the interface module. In some embodiments, the fixed part, for example fixed part <NUM> remains connected to the bone fixation device and comprises, for example linear actuator connectors <NUM>. In some embodiments, the detachable part comprises at least one component of the interface module, for example battery <NUM>.

In some embodiments, detachable part <NUM> comprises at least one connection member, for example bore <NUM> fitted to match a connection member of fixed part, for example pin <NUM> or a connection member of the bone fixation device. In some embodiments, the connecting member between the fixed part and the detachable part, for example pin <NUM> allows a mechanical and/or electrical connection between the two parts. Alternatively, detachable part comprises at least one elongated shaft fitted to be connected to a connecting member, for example a bore of the fixed part.

In some embodiments, at least one connection member between detachable part <NUM> and fixed part <NUM> is asymmetrically distributed and/or asymmetrically designed. In some embodiments, the asymmetrical distribution and/or asymmetrical design allows, for example, a single connection orientation between detachable part <NUM> and fixed part <NUM>.

In some embodiments, the attachment and detachment member comprises a strap, for example, a Velcro strap and/or a strap with a quick release clip and/or a strap with a quick release carabiner. In some embodiments, the attachment and detachment member comprises a quick release clip or hook or a carabiner.

According to some embodiments, a bone fixation device and/or an interface module connected to the bone fixation device are covered by a cover. Reference is now made to <FIG> depicting a cover for a bone fixation device and/or for an interface module connected to the device, according to some embodiments of the invention.

According to some exemplary embodiments, a cover for example cover <NUM> is configured to cover bone fixation device <NUM> and/or interface module <NUM>. In some embodiments, cover <NUM> forms a cylindrical shape with a larger diameter then the diameter of bone fixation device <NUM> when measured with the linear actuators, and a greater height compared to the combined heights of bone fixation device <NUM> and interface module <NUM>.

According to some exemplary embodiments, for example as shown in <FIG>, cover <NUM> comprises at least one transparent section and/or a window. In some embodiments, the at least one transparent window and/or section allows to visualize indications and/or alerts delivered by at least one light emitting component of the interface module. In some embodiments, cover <NUM> comprises at least one window for each connection between the interface module and a linear actuator, for example window <NUM>. In some embodiments, window <NUM> allows visualization of at least one indicator <NUM>. In some embodiments, the cover, for example cover <NUM> comprises at least one transparent section or window, for example window <NUM>. In some embodiments, window <NUM> allows visualization of light emitting component <NUM> and/or operation of input components, for example emergency button <NUM>.

In some embodiments, the cover comprises at least one zipper and/or at least one Velcro, for example to fasten the cover around the interface module and/or the bone fixation device.

It is expected that during the life of a patent maturing from this application many relevant interface modules will be developed; the scope of the term interface circuitry is intended to include all such new technologies a priori.

As used herein with reference to quantity or value, the term "about" means "within ± <NUM> % of".

The terms "comprises", "comprising", "includes", "including", "has", "having" and their conjugates mean "including but not limited to".

As used herein, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise.

Throughout this application, embodiments of this invention may be presented with reference to a range format. For example, description of a range such as "from <NUM> to <NUM>" should be considered to have specifically disclosed subranges such as "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", etc.; as well as individual numbers within that range, for example, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM>.

Unless otherwise indicated, numbers used herein and any number ranges based thereon are approximations within the accuracy of reasonable measurement and rounding errors as understood by persons skilled in the art.

Claim 1:
An electrical circuitry (<NUM>) coupled to a bone fixation device (<NUM>) having at least one linear actuator (<NUM>, <NUM>) coupled between two rings (<NUM>, <NUM>), the electrical circuitry configured to control operation of the bone fixation device according to a treatment protocol, the electrical circuitry comprising:
an interface circuitry;
a memory configured to store the treatment protocol;
a control circuitry (<NUM>), wherein said control circuitry:
controls movement of the at least one linear actuator according to the treatment protocol;
measures a value of the movement or extension of said at least one linear actuator and/or the distance or change in distance between said two rings, wherein said memory stores said value; and
determines treatment compliance by comparing said value to a desired range of values stored in said memory, and signals said interface circuitry to generate a treatment compliance indication based on said treatment compliance; and
at least one current sensor configured to measure the current of the at least one linear actuator, wherein the electrical circuitry is configured, if the measured current is not in a desired range of currents, to stop the movement of the at least one linear actuator.