COMPONENT ARCHITECTURE FOR MEDICAL DEVICE SYSTEM NETWORKS

Abstract: A component-based software architecture environment is provided for information networks used for administering one or more implantable medical devices (IMDs) in one or more patients. Various interface schema which may be used in implementing an IMD network are povided, as well as common interfaces for development of software within the network environment. The information network, and the software used in and implementing the network, may be upgraded and developed in a distributed and incremental manner, without requiring modification of entire systems or device instructions.

Description: COMPONENT ARCHITECTURE FOR MEDICAL DEVICE SYSTEM NETWORKS CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Provisional Application No. 60/199,967, filed April 27, 2000. . FIELD OF THE INVENTION The present invention generally relates to implantable medical devices and instruments. Specifically the invention relates to a system software architecture for medical device systems. More specifically, the invention pertains to implantable medical devices (IMDs) and instruments associated with them in a network environment, in which clinical and physiological data is transferred remotely, and a common software architecture is implemented to preferably develop and administer the network. BACKGROUND OF THE INVENTION The monitoring and administration of implantable medical devices (EVIDs) maybe well-suited to computerized and networked administration. The modern IMD is capable of sensing and storing large amounts of physiologic data from the host patient, and is also capable of implementing a treatment regimen based at least in part on this data—IMDs themselves naturally contain a powerful processing capacity in their own right. In addition, remote administration of IMDs via networks or other telecommunications media is being developed, and various IMD systems enable remote administration, such as those patient management and chronic systems as illustrated and described in applications assigned to the assignee of record entitled "System and Method for Transferring Information Relating to an Implantable Medical Device to a Remote Location," filed on July 21, 1999, Ser. No. 09/358,081; "Apparatus and Method for Remote Troubleshooting, Maintenance and Upgrade of Implantable Device Systems," filed on October 26, 1999, Ser. No. ; "Tactile Feedback for Indicating Validity of Communication Link with an Implantable Medical Device," filed October 29, 1999, Ser. No. ; "Apparatus and Method for Automated Invoicing of Medical Device Systems," filed October 29, 1999, Ser. No. ; "Apparatus and Method for Remote Self-Identification of Components in Medical Device Systems," filed October 29, 1999, Ser. No. ; "Apparatus and Method to Automate Remote Software Updates of Medical Device Systems," filed October 29, 1999, Ser. No. ; "Method and Apparatus to Secure Data Transfer From Medical Device Systems," filed November 2, 1999, Ser. No. ; "Implantable Medical Device Programming Apparatus Having An Auxiliary Component Storage Compartment," filed November 4, 1999, Ser. No. ; "Remote Delivery Of Software-Based Training For Implantable Medical Device Systems," filed November 11, 1999, Ser. No. ; "Medical System Having Improved Telemetry," filed July 19, 1999, Ser. No. ; "Apparatus and Method for Remote Therapy and Diagnosis in Medical Devices Via Interface Systems," filed December 14, 1999, Ser. No. ; "Virtual Remote Monitor, Alert, Diagnostics and Programming For Implantable Medical Device Systems" filed December 17, 1999, Ser. No. ; "System Of Notification Of Recalled Components For A Medical Device" filed December 29, 1999, Ser. No. ; "A Communications System For An Implantable Device And A Drug Dispenser" December 30, 1999, Ser. No. ; "Instrumentation and Software for Remote Monitoring and Programming of Implantable Medical Devices (IMDs), filed December 20, 1999, Ser. No. ; "An Information Network Scheme For Interrogation Of Implantable Medical Devices (IMDs)," filed December , 2000, Attorney Docket No. P-8746.00, Ser. No. ; "Medical Device GUI For Cardiac Electrophysiology Display And Data Communications," filed December 23, 1999, Ser. No. ; "Integrated Software System For Implantable Medical Device Installation And Management," filed December _, 2001, Attorney Docket No. P-8865.00, Ser. No. ; "Dynamic Bandwidth Monitor And Adjuster For Remote Communications With A Medical Device," filed December , 2000, Attorney Docket No. P-8848.00, Ser. No. ; "Large-Scale Processing Loop For Implantable Medical Devices (IMDs)," filed December 2000, Attorney Docket No. P-8788.00, Ser. No. ; "Chronic Real-Time Information Management Systems For Implantable Medical Devices (IMDs), "filed December 23, 1999, Ser. No. ; "Automatic Voice and Data Recognition For Medical Device Instrument Systems," filed December 23, 1999, Ser. No. ; "Central Network to Facilitate Remote Collaboration With Medical Instruments," filed December , 2000, Attorney Docket No. P-8845.00, Ser. No. ; "Application Proxy For Telecommunication-enabled Remote Medical Access Instruments," filed December 23, 1999, Ser. No. _; "User Authentication In Medical Systems Device," filed December , 2000, Attorney Docket No. P-8863.00, Ser. No. ; "Automated Invoicing Based On Medical System Usage," filed December 30, 1999, Ser. No. ; "Responsive Manufacturing and Inventory Control," filed February 04, 2000, Ser. No. ; "Information Remote Monitor (IRM) Medical Device," filed February 04, 2000, Ser. No. ; "Follow-Up Monitor For Implantable Medical Device," filed February 23, 2000, Ser. No. ; "An Implantable Medical Device With Multi-Vector Sensing Electrodes," filed February 29, 2000, Ser. No. ; "Stimulator For Delivery Of Molecular Therapy," filed March 07, 2000, Ser. No. ; "Individualized, Integrated, And Informative Internet Portal For Holistic Management of Patients With Implantable Devices," filed March , 2001, Attorney Docket No. P-8945.00, Ser. No. ; "Heart Failure Monitor Quick Look Summary For Patient Management Systems," filed March 16, 2000, Ser. No. ; "A Universal Interface For Medical Device Data Management," filed March 17, 2000, Ser. No. ; "Telepresence Apparatus And Method For Remote Implantable Medical Device Implementation And Management," filed March 24, 2000, Ser. No. ; "A Hand-Held Surface ECG and RF Apparatus Incorporated With a Medical Device," filed March 29, 2000, Ser. No. ; "Variable Encryption Scheme For Data Transfer Between Medical Devices And Related Data Management Systems," filed March , 2001, Attorney Docket No. P-8841.00, Ser. No. , "Implantable Medical Device Controlled By A Non-Invasive Physiological Data Measurement Device," filed April 4, 2000, Ser. No. ; "ECG and RF Apparatus For Medical Device Systems," filed April 19, 2000, Ser. No. ; "Passive Data Collection System From A Fleet Of Medical Instruments," filed April 21, 2000, Ser. No. ; "Report Configuration, Formatting and Distribution For Implantable Medical Devices And Instruments Network Systems," filed April 21, 2000, Ser. No. ; "Interface Devices For Instruments In Communication With Implantable Medical Devices," filed April 25, 2000, Ser. No. ; "GUI Coding for Identification of Displayable Data Quality From Medical Devices," filed April 26, 2000, Ser. No. ; all of which applications are incorporated herein by reference in their entirety. Networked and computerized JJVID administration systems, based as they are on a distributed computerized environment pose numerous challenges in the development of software in the implementation or maintenance of such systems. The constituent processors of an IMD management system, for example, exist in numerous patients at the IMD level, and in an equally large number of residential and clinical settings, all of which are being modified, replaced, and upgraded at various times according to the needs of the patients and clinicians using the system at any given time. The administration of such a network is complicated further by the fact that the software implementing the network may be developed in a dispersed fashion — various IMDs, peripheral devices and monitoring equipment, and clinician and administrative computer environments may be developed in a way that is suitable for the task at hand, but may be without particular regard to other possible uses of the software, or the other network nodes with which the software must communicate. The resulting overall network may be implemented in an atomized, fragmented manner, h addition, the distributed nature of various IMD administration processes may limit the ability of remote users to effect the IMD- related function that is desired at the appropriate time. For example, a user desiring a physiological report regarding a patient may only be able to view such a report if they have direct access to an IMD programmer that has been programmed with the ability to generate reports. Component-based software technology provides means for defining and using software components. Component technology, as implemented in evolving standards such as CORBA, DCOM and Enterprise Java Beans (EJB), provide the means for defining and using software components. The techniques of software component technology provide superior ways of developing and administering software. Component technology is related to the developing object technology, which uses class-based software architecture to enable distributed and reusable programming. Under object technology, rather than a monolithic program, or even various software modules, software objects are provided with an interface which may be used by other programmers who may not be familiar with the internal workings of the software objects. Instead, they are provided with an interface which may take the form of certain defined datatypes, or of "public" functions, which they can access by providing known arguments or quantities, and they may expect a certain type of data according to the definition of the interface. The interface maybe implemented by means of datatypes meeting object or structure definitions both in the interface and the accessing program; the interface may also be accessed by means of "public" functions in the object of the interface. "Public" in this, the programming sense, means a function accessible to a later developer, but does not necessary imply that the interface definitions or functions will be published outside of the entity creating the interface code. The software objects may be encapsulated, i.e., it may be specified by the original author that they may not be modified by a programmer or developer who later uses the object. Just as the techniques of object oriented analysis, design and programming provide superior ways of dealing with the logical structure of software, so the techniques of component technology provide superior ways of dealing with the physical structure of software. A software component will ideally provide a well-defined, "guaranteed" interface which may be relied on by programmers; an implementation separated from the interface of which a programmer using the component may be ignorant; a physical implementation of the software that is separately releasable and versionable; and will be free from cyclic dependencies. This means that a component may not use, i.e. depend on another component, if that second component already depends directly or indirectly on the first component. These ideal characteristics of components provide for software that may have its functionality physically distributed among clients and servers across networks. The software may, in addition, have its functionality distributed across programming languages — roviding interoperability between components implemented in different languages (C/C++, Java, Smalltalk, etc.). An attendant benefit of this component architecture is that the software programming and maintenance task may be distributed— software may be divided into smaller pieces that can be built separately, but according to stable, common definitions assuring interoperability if the definitions are adhered to. This, in turn, provides more easily understood and maintained code. The cost of modifying the code is more easily estimated and controlled, should software changes be required. This in turn is due to the shortened incremental build times of components, because a change to the implementation of one component doesn't require rebuilding other components. The code is more easily reused by other projects, and standardized "off the shelf development tools based on established components may be developed by various parties. SUMMARY OF THE INVENTION The present invention provides a component-based software architecture specifically adapted for enhancing the communication and operability of instruments and IMDs over a communications network. The invention may be implemented in a manner that is compatible with remote patient management systems that interact with remote data and expert data centers. Through use of the component-based software architecture environment, the information network and the software used in and implementing the network, may be upgraded and developed in a distributed and incremental manner, without requiring modification of entire systems or device instruction sets. Specifically, the invention is compatible with a data communication system that has the capacity to transfer clinical data from the patient to a remote location for evaluation, analysis, data reposition, and clinical evaluation. The component design of the software that may implement the present invention provides for distributing software functionality between network nodes without regard to the programming language or platform of the communicating components. The software functionality of the various components may, in addition to being distributed across nodes and languages, be distributed in time, i.e., the functions may take place at discrete and disparate times. The present invention may also be used with various data mining and network communication systems, including those implemented over a public network such as the Internet. According to one embodiment of the invention, component software architecture is implemented in conjunction with a hardware unit which provides functionality suited for the software architecture being implemented. Modern JJVID administration may be effected in large part through the use of interface instruments, i.e., dedicated IMD appliances that obtain data and instruct IMDs, and accordingly are capable of communication with deployed PMDs, for example, through telemetry. Examples of such interface instruments include, for example, TMD Programmers, TMD Extenders, TMD Interactive Remote Monitors, IMD Interface Medical Units, and TMD Pacing System Analyzers. The function of these devices, particularly in a networked environment, are detailed in the co-pending applications referenced above. According to a preferred embodiment of the present invention, code reuse may be implemented between these interface instruments, as well as within an interface instrument but across device applications. In other words, several software elements may be used in a single interface device, and be exploited in connection with several different IMDs or IMD functions. In this embodiment, software components may be developed that may have applicability to a number of different devices with which an instrument may interface. In a further embodiment of the present invention, software developed according to the invention may be optimized for use on a standardized hardware module which may be incorporated into any interface instrument. This hardware module may be referred to generally as a Link Electronics Module, or LEM. The LEM may have the capacity to conduct telemetry communication with a deployed IMD, communicate with other IMD peripheral appliances such as Pacing System Analyzers, conduct IMD waveform and marker processing, conduct ECG waveform processing, and detect artifacts, i.e., the measurable effect of successful IMD functioning — the detection of the device administering therapy. Other functions preferably implemented in the LEM may include the consolidation or synchronization of data to facilitate or enable display, storage, and network transmission. Under this function, the LEM may poll various data sources, consolidate these sources into a message, e.g., an XML document, and transmit the data in a consolidated state. The LEM may also effect data compression or encryption, where the data payload is identified or standardized in accordance with defined component interface features. The LEM may also preferably consolidate or synchronize real-time data of various types or from various sources, e.g., ECG and EGM graphical data, together with applicable annotations to these graphical data, in the form of artifact and marker annotations. These data, which in their native format may arrive at different rates or times, as they are collected by different sensors and may be sampled at different rates; via the LEM they may be synchronized and/or consolidated, and presented per one or more component interfaces for transmission to various client routines; "client" in this context meaning a requesting process generally, and not necessarily a client network node, h addition, the LEM, through its software or firmware, may detect or implement state changes in the interface instrument or IMD, provide real-time or continuous recording of ECG samples and IMD waveform samples or markers, provide analog output of ECG or waveform samples, markers, or artifacts. This latter function, which may be considered a chart recording function, also preferably implements a report printing function which may be directly transmitted to a suitable display, plotter, or printer. The LEM may also be implemented to accept analog input from IMDs for processing by the LEM hardware unit or the interface instrument overall. Another common function required for interface instruments that may be implemented and standardized within the LEM is the upgrade or loading of executable or object code as firmware or software for execution on the interface instrument's master processor, which does not reside within the LEM. Similarly, the LEM may provide upgrades to the flash memory or similar instruction RAM of the IMD itself. Peripheral software resident on interface instruments and other IMD peripheral devices may be implemented according to the invention to consist of two major parts: The first part is the peripheral subsystem running on the peripheral hardware or LEM. In order to incorporate the LEM into various interface instruments, a peripheral interface is developed for various interface instruments. The peripheral interface is implemented to run on that interface instrument's master processor, so that the functions of the LEM maybe flawlessly incorporated into the functionality of the interface instrument as a whole. In this way, standardized LEM software components may be implemented and upgraded centrally using the component interfaces already accessed by the interface instrument processor. Various common functions of interface instruments may be "componentized" according to the present invention, h a preferred embodiment, for example, a Report Generator component is developed that can execute within the Programmer or on other networked devices existing within a larger IMD administration network. This requires the device application, resident on the TMD itself, to export the required content in the agreed- upon format for the desired report. The user may then preferably be presented with the option to save the export image, hi this way, the user may generate reports at a later time in a remote location if desired. This present invention also may execute a Waveform Monitor within a larger IMD administration network. In this way, saved waveform information, as opposed to real-time data, may be accessed via various remote computing and communication devices that have access to the IMD administration and support network. For example, a user at a remote PC may execute a waveform monitor device and be connected to an active programmer interfacing with the Peripheral Component. In this case the user would be able to view a live real time waveform from an implanted device. Based on the common component architecture of the system, upgrades to the PC or other device user interface or analytic software may be changed and upgraded without regard to the programming of the IMD itself, of the LEM, or of the interface instrument. Likewise, any of these components may themselves be reprogrammed without impact on the other elements, as long as the component interface definitions are respected. Other functions necessary for the functioning of an IMD administration network that may be implemented as component software modules within the LEM include the collection of real-time waveform data, e.g., ECG, EGM, and marker notation indicating when an IMD has administered a treatment or is in some other relevant operational status, h addition, the LEM with component software may process waveform data and perform analysis or the data or display the output of the ECG, for example. While an Implant Device Application may be changed, this will not have an impact on the LEM or any other network node, as long as the "public" component definitions are respected by the developers of the Implant Device Application. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic network diagram of an IMD administration network according to an embodiment of the present invention. Figure 2 is a schematic diagram showing the hardware environment in which an embodiment of the present invention may be implemented. Figure 3 is an architectural diagram for implementation of a software component system according to an embodiment of the present invention. Figure 4 is an architectural diagram of an alternative embodiment of a software component system according to the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention provides a component-based software architecture specifically adapted for enhancing the communication and interoperability of instruments and EVIDs over a communications network, while providing a reusable and scalable software system that may be easily upgraded in a distributed fashion as new devices and functionalities are developed. The invention is preferably developed in a manner compatible with a communications network that implements a remote patient management systems that interact with remote data and expert data centers. At least some of the nodes of such a network are interface instruments, i.e., peripheral devices capable both of wireless communications with one or more IMDs in one or more patients, and of communications over a computer network. According to a preferred embodiment of the present invention, code reuse may be implemented between these interface instruments, as well as within an instrument but across device applications. In this embodiment, software components may be generated which may have applicability to a number of different devices that an instrument may interface with. Figure 1 depicts a typical IMD administration network 110 with which the present invention may be used, and as described in the related patent applications discussed above. IMD 112 is in telemetric communication with TMD network interface 114. JJVLD 112, representing one or more LMDs in one or more patients, may also or alternatively be in telemetric communication with programmer 116, interface medical unit 118, or remote monitor 120. Programmer 116, interface medical unit 118, and remote monitor 120 are examples of interface instruments as described generally herein. IMD network interface 114 may be replaced by, or may have installed within, a Link Electronics Module, or "LEM" unit, discussed below. Programmer 116, interface medical unit 118, or remote monitor 120 may also have within an LEM unit. The IMD network interface device 114, or interface instrument 116, 118, or 120, or the LEM installed within such instrument, is either directly, or via the LEM or TMD network interface device 114, in communication with network 122. Network 122 may be a public network, such as the Internet, if suitable security precautions are implemented such as firewalls 124. Through network 122 or other network connection, instrument 116, 118, or 120, directly or via internal LEM or LMD network interface 114, may communicate with centralized computing and monitoring computing resource 126. Computing resource 126 may have access to relevant database 128 relevant to administration of TMD 112. This network, and interface instruments 116, 118, and 120, may also be accessed by remote patient, clinician, or other authorized user personal computer 130. The positioning of a standardized hardware module, which may be termed a Link Electronics Module or LEM unit, which may be installed in interface instrument 114, 116, or 118 of Figure 1, is depicted in Figure 2 as a component of and relation to TMD network 210. Preferably, software developed according to the invention may be optimized for use on this standardized hardware module 212 which may then be incorporated into any interface instrument (e.g. 116, 118, or 120 of Figure 1), providing component-based software functionality to the device. In a preferred embodiment, the LEM 212 will have the capacity to perform several typical functions common to various peripheral interface instruments regardless of the particular type of IMD 112 administered with the instrument. For example, the LEM 212 may be configured to conduct telemetry communication with a deployed TMD 112 via transmitter/receiver 214, communicate with other IMD peripheral appliances such as Pacing System Analyzers 216, conduct TMD waveform and marker processing via processor 218, conduct ECG waveform processing, and detect artifacts. Other functions preferably implemented in the LEM may include the synchronization of data to enable display, storage, and network transmission, all effected on processor 218. In addition, the LEM, through its component software or firmware stored in storage 220, may detect or implement state changes in the interface instrument or IMD 112, provide real-time or continuous recording of ECG samples and IMD waveform samples or markers, and provide analog output of ECG or waveform samples, markers, or artifacts. This latter function, which may be considered a chart-recording function, also preferably implements a report printing function which may be directly transmitted to a suitable display, plotter, or printer via modem or network interface module 222. The LEM may also be implemented to accept analog input from IMDs 112 or other physiological monitoring equipment for processing by the LEM device or the interface instrument 116 overall. Another common function required for interface instruments that may be implemented and standardized within the LEM 212 is the upgrade or loading of executable or object code as firmware or software for execution on the interface instrument's master processor 224, which does not reside within the LEM 212. Similarly, the LEM 212 may provide upgrades to the flash memory or similar instruction RAM of the IMD 112 itself. The primary function of the LEM with respect to the deployed DVID will be the downlinking of information requests, and the uplinking to the IMD administration network of the IMD's responses. The LEM 212 will have a similar information exchange relationship with Pacing System Analyzer 216, either via direct or networked communication, as depicted in Figure 2, or via telemetry. LEM 212 will downlink information requests to the Pacing System Analyzer (PSA) 216, and uplink the responses of PSA 216, possibly after consolidating or integrating this data into waveform view information including ECG/EGM graphical information and annotations. Certain LEM functions may be provided in hardware or firmware, in addition to flash memory, in order to improve the speed or efficiency of the LEM 212. These functions may be implemented in a manner complying with component definitions, so that the resulting LEM 212 may be easily implemented in most or all interface instruments without modification or translation or the device instructions. A software or firmware module implementing an interface with peripheral interface component will be required in order to make the LEM functions work with the particular interface instrument. The software architecture afforded by the present invention is depicted in Figure 3. A component software system for IMD administration networks is shown at 310. Implant device application 313 is resident within an implanted IMD, and executes on JMD master processor 224 of Figure 2. Peripheral software components 314, 316 and 318 are resident on interface instruments such as 114, 116, and 118 of Figure 1, and other TMD peripheral devices. These peripheral software components 314 may consist of at least two major parts; the first part being the peripheral subsystem running on the interface instrument hardware or LEM module within the interface instrument. In order to incorporate the LEM into various interface instruments, a peripheral interface 314 may be developed for various interface instruments. The peripheral interface may run on the master processor of the interface instrument, 224 of Figure 2, or within LEM processor 218 of Figure 2. In this manner, the functions of the LEM may be incorporated into the entire body of functionality of the interface instrument via interface compliant message passing between peripheral interface 314 running on interface instrument processor 224 of Figure 2, and peripheral subsystem running on LEM 212 of Figure 2. Standardized LEM software components may be implemented and upgraded centrally using the component interfaces already accessed by the interface instrument processor. LEM 212 may also provide for detection and reporting of relevant IMD state changes, many of which may be generalized across IMD types. LEM 212 may also flash or download executable code and configuration settings into storage of the remote interface instrument 116, 118 or 120 of Figure 1. The component system according to the invention may provide for reusable modules which perform various common functions of interface instruments. A major common function required of most interface instruments is report generation. A Report Generator component 318 may be developed that can execute within the IMD programmer 116 of Figure 1, or other interface instrument 118 or 120, or within a larger EvID administration network, for example, on a remote machine 130 of Figure 1. In this way, report generation is no longer confined to, nor must report generation be coded to, a particular medical support device. Data, preferably after being synchronized and compiled, may be sent to a Report Generator Component software module that may be resident within an IMD interface device, or within a network storage or processing device, and which may include, for example, remote personal computer 130 of Figure 1. Generally, those components on the top interface tier of Figure 3, i.e., Peripheral Interface Component 314, Live Waveform Monitor Component 316, and Report Generator Component 318, may be resident or executed on an interface instrument such as programmer 116 of Figure 1, or may be executed on a network device, including PC 130 of Figure 1, of other suitable device within IMD information network 110. The networked device running, for example, the Live Waveform Monitor Component 316 may view static waveform information that has been stored, or may view a real-time waveform monitor session via an active programmer or other interface device properly interfacing to the Live Waveform Monitor Component 316. The device application 312 will be resident on the IMD itself. In this embodiment, the device application must export the required content in the agreed-upon format for the desired report to Report Generator component 318. The user may then preferably be presented with the option to save the export image. In this way, the user may generate reports at a later time in a remote location such as personal computer 130 of Figure 1 if desired. A component-based viewer may be provided in order to view the saved export image. This viewer necessarily uses the component framework of the system as a whole, particularly as regards graphic display. The report generation component accepts implant session data or follow-up session data and generates the user selected report. Preferably, user customization will be provided. This customization maybe implement locally, without impacting the operation of Report Generation Component 318. Only such information as the user has requested, and in the format requested, will be displayed to remote machine 130, according to component standardized requests for information, e.g., via message passing or function calls to public methods of the Report Generator Component 318, or via structured communications with Device Component 313, as discussed herein with reference to Figure 4. This present invention also may execute a Waveform Monitor Component 316 within a larger IMD administration network. In this way, saved waveform information, as opposed to real-time data, may be accessed via various remote computing and communication devices that have access to the IMD administration and support network. For example, a user at a remote PC 130 of Figure 1 may execute a waveform monitor device via network interface 320, and be connected to an active programmer (e.g. 116 of Figure 1) interfacing with the interface instrument. The live waveform monitor component 316 of Figure 3 accepts real time or static waveform data and presents an integrated view to the user. The user can control the number of waveforms ( combination of surface ECG and implant device EGM ) along with markers and annotation information. In this instance, the user would be able to view a live real-time waveform from an implanted device. Based on the common component architecture of the system, upgrades to the PC (130 of Figure 1), or other device user interface or analytic software may be changed and upgraded without regard to the programming of the IMD 112 itself, of the LEM 212, or of the interface instrument. Likewise, any of these components may themselves be reprogra med without impact on the other elements, as long as the component interface definitions are respected. An alternate software architecture embodiment of the present invention is depicted in Figure 4. Figure 4 depicts a Device component architecture generally at 410. Device Component 313 operates centrally within TMD (112 in Figure 1) or interface instrument (114, 116, or 118 of Figure 1). This component is encapsulated and protected from direct access by interface components discussed herein. The Device Component 313 may communicate via any number of structured communications schema, such as those suitable for client-server or other message passing, or function calls and returns. Suitable examples include CORBA, a JavaBeans API, DCOM, XSLT, OAP, or XML. This latter schema, XML, or extensible Markup Language, is expected to prove particularly suitable for non-analog interfacing of the components of the instant invention. As depicted in Figure 4, Device Component 313 may send information and receive instructions from Controller/Viewer 412, which may be used for programming an TMD, or may interface via XML instructions and responses to Episode Viewer component 414, which may provide read-only access to IMD operation and physiologic information to individuals having properly authenticated access to a network having access to Device Component 313. Device Component 313 may also interface with Trend Viewer Component 416, Parameter Viewer 418, or Report Generator 318 , which may operate in a manner similar to Report Viewer Component 318 of Figure 3. Device Component 313 may also interface via XML using a defined instruction and parameter dictionary with Database, e.g. of patient history information, or with Industry Standard Style- Sheets formatting component 420. The various potential interfaces to which Device Component 313 may interface via XML, this standard is depicted generally by virtual central interface 421. Device Component 313 may also be accessed by properly authenticated individuals via Home Monitor Component 422 or Peripheral Interface Component 314. Peripheral Interface Component 314 may operate in a manner similar to that described with reference to Figure 3. These interface communications may also be implemented using a structured, developer-defined, parsible communication schema such as XML. In a preferred embodiment of the present invention, real-time waveform data for a particular IMD may be accessed by a remote computer (e.g. 130 of Figure 1), via Live Waveform Component 316. Live Waveform Component 316 may transmit data from Live Waveform Viewer Component 424 via a communication schema suitable for pictorial/image data, in order to transmit analog graphical information regarding the IMD functions and effect, in order to compare programmed treatment with actual treatment as indicated by interventional artifacts. A suitable scheme for transmission between components of this analog, or as transmitted what may be termed "pseudo-analog" pictorial representations, is Scalable Vector Graphics, or SVG, a mark-up language which is a W3C standardized grammar defined within the XML language. Such analog representations, when transmitted to Waveform Viewer Component 316, will preferably include useful data including IMD marker and artifact indications on the surface ECG/implant device EGM data, as well as other relevant annotation information. LEM 212 of Figure 2 will also preferably accept analog or pseudo-analog input from other Components which may feed relevant information for processing by LEM 212. The components of Figure 4, when implemented in accordance with the present invention as standardized interface components, may be individually developed, upgraded, replaced, and redesigned while respecting the interface definitions, such as those defined as XML tags, attributes, elements, or entities, collectively under an XML Document Type Definition suitable for transmission of TMD administration information. While a preferred embodiment of the present invention has been described, it should be understood that various changes, adaptations and modifications may be made therein without departing from the spirit of the invention and the scope of the appended claims.

Claims: WHAT IS CLAIMED IS: 1. A computerized component architecture for medical device systems, comprising: a body of software components having standardized software interfaces to medical device interface instruments and IMDs; and at least one hardware module capable of executing the software components, with the at least one hardware module being deployable to a plurality of medical device interface instruments; said hardware module having means for communication with a data communications network, and with a medical device external to the hardware module. 2. The computerized component architecture for medical device systems of claim 1, wherein at least one hardware module has processing and telemetry capabilities. 3. The computerized component architecture for medical device systems of claim 1, wherein at least one hardware module is installed within an interface instrument, to which it is deployable. 4. The computerized component architecture for medical device systems of claim 1, wherein the component software architecture is optimized to be executed on the hardware module. 5. In an IMD administration network in which one or more interface instruments are in communication with a plurality of medical devices applied to one or more patients, a computerized software component system, comprising: a defined body of interface definitions; at least one body of executable code capable of instructing or operating an IMD interface instrument, the body utilizing at least one of the interface definitions to communicate with the instrument or with a computerized IMD administration network. 6. A computerized component architecture for medical device systems, comprising: a body of software components having standardized software interfaces to medical device interface instruments; a computerized network of processing equipment with at least two nodes remote from each other; and means for the execution of software components via these interfaces from remote processing equipment. 7. The computerized component architecture of claim 6, further comprising a hardware module capable of executing the software components, said hardware module being deployable to a plurality of medical device interface instruments. 8. The computerized component architecture of claim 7, wherein said hardware module is integrated within at least one medical device interface instrument. 9. A software component-based IMD administration and control instrument, comprising: a master processing instrument having network communications capabilities; an electronics module having telemetry and processing capabilities installed within said master processing instrument; at least one component software module resident within the memory of said electronics module; 10. The component-based IMD administration and control instrument of claim 9, wherein the master processing instrument comprises an TMD programmer. 11. The component-based IMD administration and control instrument of claim 9, wherein the master processing instrument comprises an TMD extender. 12. The component-based IMD administration and control instrument of claim 9, wherein the master processing instrument comprises an JMD interactive remote monitor. 13. An IMD monitoring and administration network environment implementing reusable and extendable software, comprising: at least one IMD in communication with at least one IMD interface device; at least one of said IMD interface device having installed interface software in message-passing relation with at least one network interface; at least one of said network interface being in message-passing relation with at least one user node. 14. The TMD monitoring and administration network environment of claim 13, wherein the message-passing relation between the interface software installed on said IMD interface and said network interface is implemented by XML document transmission. 15. The IMD monitoring and administration network of claim 13, wherein the message-passing relation between the interface software installed on said IMD interface and said network interface is capable of transmitting analog representations of patient waveform data. 16. The TMD monitoring and administration network environment of claim 15. wherein the analog representations of patient waveform data transmitted via the message passing relation between the interface software installed on said IMD interface and said network interface is implemented by SVG document transmission. 17. The IMD monitoring and administration network environment of claim 15 further comprising a live waveform software component; and a client live waveform viewer software component wherein graphical information is transmitted from the live waveform software component to the client live waveform viewer software component. 18. The TMD monitoring and administration network environment of claim 17, wherein the graphical information is transmitted via a markup language. 19. The IMD monitoring and administration network environment of claim 18, wherein the graphical information is transmitted via SVG. 20. A method of implementing a compartmentalized, robust IMD monitoring and administration network, comprising the steps of: establishing a data communications link between at least one IMD and one computer via an interface device; programming at least one software component to execute on the interface device, the software component being capable of message-passing communications over data communications media; programming at least one software component to execute on a linked computer, said software component being capable of operating in a message-passing relationship with at least one software component designed to execute on the interface device. 21. The method of implementing a compartmentalized, robust IMD monitoring and administration network of claim 20, wherein the message-passing relationship is effected using a markup language. 22. The method of implementing a compartmentalized, robust TMD monitoring and administration network of claim 21 , wherein the message-passing relationship is effected using XML. 23. The method of implementing a compartmentalized, robust IMD monitoring and administration network of claim 20, wherein the message-passing relationship is effected using client component function calls to public functions of the software component being messaged. 24. The method of implementing a compartmentalized, robust TMD monitoring and administration network of claim 23, wherein the software component being messaged is implemented in an object-oriented programming language. 25. The method of implementing a compartmentalized, robust TMD monitoring and administration network of claim 24, wherein the software component being messaged is implemented in a manner where it may return a software object in response to the public function call. .

Inventors: FARR JOHN B, JOHNSON KEVIN M, NELSON CHESTER G, STROMBERG CHARLES R, FARR, JOHN, B., JOHNSON, KEVIN, M., NELSON, CHESTER, G., STROMBERG, CHARLES, R.
Applicants: FARR JOHN B, JOHNSON KEVIN M, MEDTRONIC INC, NELSON CHESTER G, STROMBERG CHARLES R, FARR, JOHN, B., JOHNSON, KEVIN, M., MEDTRONIC, INC., NELSON, CHESTER, G., STROMBERG, CHARLES, R.
Application year: 2001
Main classification: G06F19
IPC codes: G06F19