# Patent

## Title
Detecting unauthorized visitors

## Abstract

An unauthorized visitor system collects an image of a person detected in a room of a patient. The system identifies reference points on the person's face, for example, points along the cheeks, jowls, and/or brow. The system may compare the reference points to reference points of images associated with registered visitors. The system then determines, based on the comparison, if the person is a registered visitor. One or more designated recipients may be alerted if the person is not a registered visitor or if the person breaches a patient identification zone established around a particular patient. The system may also register the person in a database of visitors.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application Ser. No. 62/273,735, entitled “Methods and Systems for Detecting Stroke Symptoms,” filed Dec. 31, 2015, herein incorporated by reference in its entirety, and is related to commonly assigned U.S. patent applications Ser. No. 15/395,243 entitled “Methods and Systems for Assigning Locations to Devices” and “Methods and Systems for Detecting Prohibited Objects in a Patient Room” 15/395,250, filed concurrently herewith on the same date.


BACKGROUND
Medical facilities, such as hospitals, face many challenges in addition to simply caring for patients. For example, securing patients and equipment (e.g., medical devices) consumes many resources and current methods lack effectiveness. In addition to requiring personnel to physically monitor locations within the facility, visitor logs and visitor badges, and radio-frequency identification (RFID) technology are often utilized to control access to certain locations within the facility. However, each of these require subjective decision-making and are prone to error by the personnel monitoring the locations or assisting visitors signing a visitor log and issuing visitor badges accordingly. Further, none of these methods necessarily prevent an authorized visitor from breaching areas of the facility where the authorized visitor is not authorized. For example, a visitor may be authorized to visit a particular patient but, based on some condition of the patient, may not have close contact with the patient. In contrast, a caregiver of the same patient may need to have close contact with the patient. Additionally, in some situations, an authorized visitor may unwittingly provide contraband (e.g., some thing or some object a particular patient is not allowed) to a patient that the current methods are unable to detect. Finally, medical devices are constantly being shuffled between patients and locations within a facility. Tracking the locations of these devices can be extremely difficult. Accordingly, overall security for patients and equipment suffers and the many resources currently being utilized are wasted.
BRIEF SUMMARY
This brief summary is provided as a general overview of the more detailed disclosure which follows. It is not intended to identify key or essential elements of the disclosure, or to define the claim terms in isolation from the remainder of the disclosure, including the drawings.
This disclosure generally relates to methods and systems for detecting unauthorized visitors in medical facilities. Generally, and without limitation, the method involves collecting an image of a person detected in a room of a patient. The system identifies reference points on the person's face, for example, points along the cheeks, jowls, and/or brow. The system may compare the reference points to reference points of images associated with registered visitors. The system then determines, based on the comparison, if the person is a registered visitor. One or more designated recipients may be alerted if the person is not a registered visitor or if the person breaches a patient identification zone established around a particular patient. The system may also register the person in a database of visitors.
In some aspects, this disclosure relates to a method for detecting unauthorized visitors. The method comprises: receiving from a 3D motion sensor an image of a person detected in a room of a patient; comparing, positions of a plurality of reference points of the image to positions of a plurality of registered reference points of images associated with registered visitors, the plurality of registered reference points of images associated with registered visitors stored in a database of registered visitors; determining, based on the comparing, if the person is a registered visitor; and registering the person, if the determining indicates the person is not a registered visitor.
In some aspects, this disclosure relates to a system for detecting unauthorized visitors. The system comprises: one or more 3D motion sensors located to provide the one or more 3D motion sensors with a view of a person to be monitored, the 3D motion sensors configured to collect a series of images of the face of the person; a computerized monitoring system communicatively coupled to the one or more 3D motion sensors, the computerized monitoring system configured to identify a plurality of reference points on the face of the person and to compare positions of the plurality of the reference points to positions of a plurality of registered reference points on the face of registered visitors to determine if the person is a registered visitor, the plurality of registered reference points on the face of registered visitors stored in a database; and a computerized communication system communicatively coupled to the computerized monitoring system, the computerized communication system configured to send an alert to one or more designated recipients if the person is not a registered visitor and is determined to be an unauthorized visitor for the patient.
The unauthorized visitor system may further comprise a central video monitoring system. The central video monitoring system may be communicatively coupled to the computerized communication system. The central video monitoring system may be configured to display an image of the person. The central video monitoring system may comprise a primary display. The central video monitoring system may comprise an alert display. The alert display may be a dedicated portion of the primary display. The alert display may be a separate display or series of displays from the primary display. If the computerized patient monitoring system detects a person that is not a registered visitor, the central communication system may be configured to send an alert to the central video monitoring system. The central video monitoring system may be configured to move the display of the image of the person from the primary display to the alert display upon receipt of an alert.
In some aspects this disclosure relates to computer-readable storage media having embodied thereon computer-executable instructions. When executed by one or more computer processors the instructions may cause the processors to: receive from a 3D motion sensor an image of a person detected in a room of a patient; compare, the image of the person to images of registered visitors stored in a database of registered visitors; determine, based on the comparing, if the person is a registered visitor; and alert one or more designated recipients if the person is not a registered visitor and is determined to be an unauthorized visitor for the patient.
Additional objects, advantages, and novel features of the disclosure will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following, or may be learned by practice of the disclosure.



BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
The description references the attached drawing figures, wherein:
FIGS. 1-6 are exemplary flowcharts for unauthorized visitor detection systems, in accordance with embodiments of the present disclosure; and
FIGS. 7-20 are exemplary displays for unauthorized visitor detection systems, in accordance with embodiments of the present disclosure.



DETAILED DESCRIPTION
As noted in the Background, medical facilities, such as hospitals, face many challenges in addition to simply caring for patients. For example, securing patients and equipment (e.g., medical devices) consumes many resources and current methods lack effectiveness. In addition to requiring personnel to physically monitor locations within the facility, visitor logs and visitor badges, and radio-frequency identification (RFID) technology are often utilized to control access to certain locations within the facility. However, each of these require subjective decision-making and are prone to error by the personnel monitoring the locations or assisting visitors signing a visitor log and issuing visitor badges accordingly. Further, none of these methods necessarily prevent an authorized visitor from breaching areas of the facility where the authorized visitor is not authorized. For example, a visitor may be authorized to visit a particular patient but is not authorized to visit another patient or particular areas of the facility. Additionally, in some situations, an authorized visitor may unwittingly provide contraband (e.g., some thing or some object a particular patient is not allowed to possess or be near) to a patient that the current methods are unable to detect. Finally, medical devices are constantly being shuffled between patients and locations within a facility. Tracking the locations of these devices can be extremely difficult. Accordingly, overall security for patients and equipment suffers and the many resources currently being utilized are wasted.
The subject matter of the present invention is described with specificity herein to meet statutory requirements. However, the description itself is not intended to limit the scope of this patent. Rather, the inventor has contemplated that the claimed subject matter might also be embodied in other ways, to include different steps or combinations of steps similar to the ones described in this document, in conjunction with other present or future technologies. Moreover, although the terms “step” and/or “block” may be used herein to connote different elements of methods employed, the terms should not be interpreted as implying any particular order among or between various steps herein disclosed unless and except when the order of individual steps is explicitly described.
As shown in FIG. 1, a system for detecting unauthorized visitors 100 may include one or more 3D motion sensors 104. A 3D motion sensor is an electronic device that contains one or more cameras capable of identifying individual objects, people and motion. The 3D motion sensor may further contain one or more microphones to detect audio. The cameras can utilize technologies including but not limited to color RGB, CMOS sensors, lasers, infrared projectors and RF-modulated light. The 3D motion sensor may have one or more integrated microprocessors and/or image sensors to detect and process information both transmitted from and received by the various cameras. Exemplary 3D motion sensors include the Microsoft® Kinect® Camera, the Sony® PlayStation® Camera, and the Intel® RealSenseTM Camera, each of which happens to include microphones, although sound capture is not essential to the practice of the disclosure. A user may be able to configure alerts based on data that is received from the 3D motion sensor 104 and interpreted by the computerized patient monitoring system 106. For example, a user can configure the computerized patient monitoring system 106 to provide alerts based on data the computerized patient monitoring system 106 has interpreted for setting zones in a patient's room, comparing data from multiple systems (RTLS or facial recognition) to determine authorized visitors, a patient crossing a trip wire, falling on the ground, or entering or exiting a safety zone.
As used herein, “a sensor” and “sensors” are used interchangeably in the singular and plural unless expressly described as a singular sensor or an array of sensors. A singular sensor may be used, or a sensor may comprise two or more cameras integrated into a single physical unit. Alternately, two or more physically distinct sensors may be used, or two or more physically distinct arrays of sensors may be used.
An “unauthorized visitor” may be a person in the room of a patient being monitored that is already registered in a database of persons (e.g., caregiver, staff, or visitor), but not allowed to be in close proximity to the patient. An unauthorized visitor may be a person in the room of the patient being monitored that has not yet been registered in a database of persons.
A 3D motion sensor 104 may be co-located with a patient 102 to be monitored. The patient 102 to be monitored may be monitored in a variety of environments, including, without limitation, a hospital, a home, a hospice care facility, a nursing home, an assisted living facility, an outpatient medical care facility, and the like. The 3D motion sensor 104 may be positioned where it is likely to capture skeletal tracking of the patient 102 to be monitored or visitors entering the room. For example, a 3D motion sensor 104 may be oriented to take images of a bed, chair, or other location where the patient 102 to be monitored or visitors entering the room may spend a significant amount of time. The 3D motion sensor 104 may be permanently installed, or may be temporarily set up in a room as needed. The patient 102 to be monitored may be under immediate medical care, e.g., in a medical facility under the supervision of a medical professional, or may not be under immediate care, e.g., in a home or other environment, possibly with a caregiver. A caregiver may be a medical professional or paraprofessional, such as an orderly, nurse's aide, nurse, or the like. A caregiver may also be a friend, relative, individual, company, or facility that provides assistance with daily living activities and/or medical care for individuals, such as individuals who are disabled, ill, injured, elderly, or otherwise in need of temporary or long-term assistance. In some instances, the person to be monitored may be self-sufficient and not under the immediate care of any other person or service provider.
The 3D motion sensor 104 may communicate data, such as skeletal images of the patient 102 being monitored or a visitor detected in the room, to a computerized patient monitoring system 106. The computerized patient monitoring system 106 is a computer programmed to monitor transmissions of data from the 3D motion sensor 104. The computerized patient monitoring system 106 may be integral to the 3D motion sensor 104 or a distinctly separate apparatus from the 3D motion sensor 104, possibly in a remote location from 3D motion sensor 104 provided that the computerized patient monitoring system 106 can receive data from the 3D motion sensor 104. The computerized patient monitoring system 106 may be located in the monitored person's room, such as a hospital room, bedroom, or living room. The computerized patient monitoring system 106 may be connected to a central video monitoring system 116. The computerized patient monitoring system 106 and central video monitoring system 116 may be remotely located at any physical locations so long as a data connection exists (USB, TCP/IP or comparable) between the computerized patient monitoring system 106, the central communication system 112 (if separate from computerized patient monitoring system 106), the central video monitoring system 116, and the 3D motion sensor(s) 104.
The computerized patient monitoring system 106 may receive data from 3D motion sensor 104 for a monitoring zone (i.e., the patient's room or area to be monitored). At step 108, the computerized patient monitoring system 106 may assess whether a visitor is detected in the room using skeletal tracking based on detecting a skeleton in addition to the skeleton of the patient. If a visitor is not detected in the room, the computerized patient monitoring system 106 may continue to analyze images in the monitoring zone as long as 3D motion sensor 104 continues to transmit data.
If a visitor is detected within the monitoring zone at step 108 (via skeletal tracking indicating that two skeletons are too close to each other), computerized patient monitoring system 106 may, at step 110, determine whether the visitor was in proximity to the patient. Computerized patient monitoring system 106 may establish a patient identification zone within the monitoring zone that, if crossed by a visitor establishes that the visitor was in proximity to the patient. Such a patient identification zone may also be configured by an administrator of the computerized patient monitoring system 106. Patient identification zones can be established using any shapes, including, without limitation, rectangles, squares, circles, ovals, triangles, and irregular shapes.
Computerized patient monitoring system 106 may assign reference points to identify the boundaries of the patient identification zone. For example, reference points may be assigned to a perimeter around the patient. It should be understood that the selection of the reference points may vary with the individual and/or the configuration of the monitoring system 100. Reference points may be configured automatically by the monitoring system 100, may be configured automatically by the monitoring system 100 subject to confirmation and/or modification by a system user, or may be configured manually by a system user.
On detecting the visitor came into close proximity to the patient, such as by entering the patient identification zone, and is now considered an unauthorized visitor, central communication system 112 may be configured to send an alert of the unauthorized visitor to one or more designated recipients (e.g., caregiver(s) 120). Central communication system 112 may be an integral part of computerized patient monitoring system 106 and/or may be implemented using separate software, firmware and/or hardware, possibly physically remote from central communication system 112.
When an alert is triggered, the alert may be sent, at least initially, to the patient 102 being monitored, to give the patient 102 being monitored an opportunity to respond before alerting the central video monitoring system 116 and/or caregiver(s) 120. For example, an audible message may be played in the room where patient 102 is being monitored, possibly asking something like, “Please refrain from close contact with the patient.”
Shown as step 114 in FIG. 1, computerized patient monitoring system 106 can analyze subsequent image data from 3D motion sensor 104 for corrective action such as the unauthorized visitor moving out of the patient identification zone or gestures, such as a head nod, consistent with a yes or no answer to determine if the action will be corrected. If 3D motion sensor 104 is equipped with microphones, computerized patient monitoring system 106 can analyze sound data for recognizable words, such as okay, yes, or no, help.
Central video monitoring system 116 may be alerted if no response is received at step 114, or if the response is unintelligible or indicates that the patient 102 being monitored and/or the unauthorized visitor does not intent to comply with the patient identification zone requirements. Alternately, or additionally, central video monitoring system 116 may be alerted with or even before patient 102, so that central video monitoring system 116 can determine whether the unauthorized visitor detected is, in fact, problematic. On receiving an alert, the central video monitoring system 116, or an attendant there, may view live image, video and/or audio feed from the 3D motion sensor 104, and evaluate whether the unauthorized visitor presents a danger to the patient and/or himself. If patient 102 has been alerted by the central communication system 112, central video monitoring system 116 or an attendant there can use the data from 3D motion sensor 104 to evaluate whether a response from patient 102 is indicates that patient 102 or unauthorized visitor is complying with the patient identification zone requirements. Central video monitoring system 116 and/or computerized patient monitoring system 106 may analyze the response from patient 102 and/or unauthorized visitor, however, if the response does not include words or gestures recognizable by the computerized system, an attendant at central video monitoring system 116 may be able to interpret the person's response. If needed, the central video monitoring system 116 and/or the attendant could then approve alert(s) to appropriate caregiver(s) 120 and/or call for emergency assistance (e.g., send a request for security).
One or more caregiver(s) 120 local to patient 102 can be alerted with or even before patient 102 and/or central video monitoring system 116, so that the caregiver(s) 120 can assess what is happening in person. Or, monitored patient 102, caregiver(s) 120 and the central video monitoring system 116 could all be alerted at the same time. The priority and timing of alerts to different individuals or stations can be configured in accordance with the needs and desires of a particular facility, experience with a particular monitored individual or type of patient, or any other criterion of the system owner or user. This is true for initial alerts as well as continuing alerts (e.g., if an unauthorized visitor is detected in and remains in close proximity to the patient 102, and no response from patient 102 or a caregiver 120 is received or observed) or repeated alerts (two or more distinct events where an unauthorized visitor is detected in close proximity to the patient 102). The priority and timing of alerts to different individuals may be different for initial, continuing, and/or repeated alerts.
Data associated with alerts may be logged by computerized patient monitoring system 106 and/or central video monitoring system 116 in a database 118. Data associated with an alert may include, without limitation, the telemetry data from 3D motion sensor 104 that triggered the alert; buffered data preceding the telemetry data that triggered the alert; telemetry data subsequent to the alert; the number and substantive content of an alert; the individual(s) and/or groups to whom an alert was addressed; the response, if any, received or observed following an alert; and combinations thereof.
As shown in FIG. 2, unauthorized visitor system 200 may be utilized to register a person(s) 202 entering the room of a patient. For example, 3D motion sensor 204 may detect a person 202 entering the room of the patient. Facial features of the visitor may be analyzed by computerized patient monitoring and facial recognition system 206 to determine if the visitor has a recognition profile stored in database 210. If the person is registered (i.e., indicating a recognition profile of the person has been stored in database 210), no further action is taken. If the person is not registered in database 210, a recognition profile is created for the person in database 210. The recognition profile may include image of the person, identifying information indicating whether the person is a caregiver, staff, or visitor, and any rights and/or privileges that person may have.
In FIG. 3, a 3D motion sensor 304 may be co-located with a patient 302 to be monitored. The patient 302 to be monitored may be monitored in a variety of environments, including, without limitation, a hospital, a home, a hospice care facility, a nursing home, an assisted living facility, an outpatient medical care facility, and the like. The 3D motion sensor 304 may be positioned where it is likely to capture images of the face of the patient 302 to be monitored. For example, a 3D motion sensor 304 may be oriented to take images of a bed, chair, or other location where the patient 302 to be monitored may spend a significant amount of time. In some embodiments, the 3D motion sensor 304 may be oriented to take images of persons entering and exiting the room of the patient 302 to be monitored. In some embodiments, the 3D mention sensor 304 may be oriented to take images of items or equipment (e.g., medical devices) that may be located in the room of the patient 302 to be monitored. The 3D motion sensor 304 may be permanently installed, or may be temporarily set up in a room as needed. The patient 302 to be monitored may be under immediate medical care, e.g., in a medical facility under the supervision of a medical professional, or may not be under immediate care, e.g., in a home or other environment, possibly with a caregiver. A caregiver may be a medical professional or paraprofessional, such as an orderly, nurse's aide, nurse, or the like. A caregiver may also be a friend, relative, individual, company, or facility that provides assistance with daily living activities and/or medical care for individuals, such as individuals who are disabled, ill, injured, elderly, or otherwise in need of temporary or long-term assistance. In some instances, the person to be monitored may be self-sufficient and not under the immediate care of any other person or service provider.
The 3D motion sensor 304 may communicate data, such as images of the patient 302 being monitored or a visitor detected in the room, to a computerized patient monitoring system 306. The computerized patient monitoring system 306 is a computer programmed to monitor transmissions of data from the 3D motion sensor 304. The computerized patient monitoring system 306 may be integral to the 3D motion sensor 304 or a distinctly separate apparatus from the 3D motion sensor 304, possibly in a remote location from 3D motion sensor 304 provided that the computerized patient monitoring system 306 can receive data from the 3D motion sensor 304. The computerized patient monitoring system 306 may be located in the monitored person's room, such as a hospital room, bedroom, or living room. The computerized patient monitoring system 306 may be connected to a central video monitoring system 316. The computerized patient monitoring system 306 and central video monitoring system 316 may be remotely located at any physical locations so long as a data connection exists (USB, TCP/IP or comparable) between the computerized patient monitoring system 306, the central communication system 312 (if separate from computerized patient monitoring system 306), the central video monitoring system 316, and the 3D motion sensor(s) 304.
The computerized patient monitoring system 306 may receive data from 3D motion sensor 304 for a monitoring zone (i.e., the patient's room or area to be monitored). At step 308, the computerized patient monitoring system 306 may assess whether a visitor is detected in the room. If a visitor is not detected in the room, the computerized patient monitoring system 306 may continue to analyze images in the monitoring zone as long as 3D motion sensor 304 continues to transmit data.
If a visitor is detected (via skeletal tracking or blob recognition) within the monitoring zone at step 308, computerized patient monitoring system 306 may, at step 310, determine whether the visitor in an authorized visitor (via facial recognition). To do so, computerized patient monitoring system 306 may assign reference points to distinctive features of the image of the visitor. For example, reference points may be assigned around the eyes and reference points around the mouth of the visitor. It should be understood that the selection of the reference points may vary with the individual and/or the configuration of the monitoring system 300. For example, if bandages or physiological anomalies would complicate the tracking of routine reference points, alternative reference points may be assigned. Reference points may be configured automatically by the monitoring system 300, may be configured automatically by the monitoring system 300 subject to confirmation and/or modification by a system user, or may be configured manually by a system user. The reference points corresponding to the visitor may be compared to a database comprising reference points of known or authorized visitors. Various machine learning and/or facial recognition techniques may additionally be utilized to determine if the visitor is an authorized visitor. If no match is found in the database of known visitors, the visitor may be an unauthorized visitor.
Accordingly, computerized patient monitoring system 306 may communicate an image of the visitor to central communication system 312. Central communication system 312 may be configured to send an alert of the unauthorized visitor to one or more designated recipients (e.g., caregiver(s) 320). Central communication system 312 may be an integral part of computerized patient monitoring system 306 and/or may be implemented using separate software, firmware and/or hardware, possibly physically remote from central communication system 312. When an alert is triggered, the alert may be sent, at least initially, to the patient 302 being monitored, to give the patient 302 being monitored an opportunity to respond before alerting the central video monitoring system 316 and/or caregiver(s) 320. For example, an audible message may be played in the room where patient 302 is being monitored, possibly asking something the visitor to, “Please show your identification.”
Shown as step 314 in FIG. 1, computerized patient monitoring system 306 can analyze subsequent image data from 3D motion sensor 304 for corrective action such as the unauthorized visitor adequately providing identification, such as by showing identifying or providing an indication consistent with a yes or no answer to determine if the action will be corrected. If 3D motion sensor 304 is equipped with microphones, computerized patient monitoring system 306 can analyze sound data for recognizable words, such as okay, yes, or no, help.
Central video monitoring system 316 may be alerted if no response is received at step 314, or if the response is unintelligible or indicates that the unauthorized visitor does not intent to comply. Alternately, or additionally, central video monitoring system 316 may be alerted with or even before patient 302, so that central video monitoring system 316 can determine whether the unauthorized visitor detected is, in fact, problematic. On receiving an alert, the central video monitoring system 316, or an attendant there, may view live image, video and/or audio feed from the 3D motion sensor 304, and evaluate whether the unauthorized visitor presents a danger to the patient and/or himself. If patient 302 has been alerted by the central communication system 312, central video monitoring system 316 or an attendant there can use the data from 3D motion sensor 304 to evaluate whether a response from patient 302 is indicates that unauthorized visitor is complying with identification requirements. Central video monitoring system 316 and/or computerized patient monitoring system 306 may analyze the response from patient 302 and/or unauthorized visitor, however, if the response does not include words or gestures recognizable by the computerized system, an attendant at central video monitoring system 316 may be able to interpret the person's response. If needed, the central video monitoring system 316 and/or the attendant could then approve alert(s) to appropriate caregiver(s) 320 and/or call for emergency assistance (e.g., send a request for security).
One or more caregiver(s) 320 local to patient 302 can be alerted with or even before patient 302 and/or central video monitoring system 316, so that the caregiver(s) 320 can assess what is happening in person. Or, monitored patient 302, caregiver(s) 320 and the central video monitoring system 1316 could all be alerted at the same time. The priority and timing of alerts to different individuals or stations can be configured in accordance with the needs and desires of a particular facility, experience with a particular monitored individual or type of patient, or any other criterion of the system owner or user. This is true for initial alerts as well as continuing alerts (e.g., if an unauthorized visitor is detected, and no response is received or observed) or repeated alerts (two or more distinct events where an unauthorized visitor is detected). The priority and timing of alerts to different individuals may be different for initial, continuing, and/or repeated alerts.
Data associated with alerts may be logged by computerized patient monitoring system 306 and/or central video monitoring system 316 in a database 318. Data associated with an alert may include, without limitation, the telemetry data from 3D motion sensor 304 that triggered the alert; buffered data preceding the telemetry data that triggered the alert; telemetry data subsequent to the alert; the number and substantive content of an alert; the individual(s) and/or groups to whom an alert was addressed; the response, if any, received or observed following an alert; and combinations thereof. In embodiments, data for authorized visitors (e.g., recognition profile) may also be stored in database 318.
As shown in FIG. 4, unauthorized visitor system 400 may be utilized in connection with a real-time locating system (RTLS) to register a person(s) entering the room of a patient. For example, RTLS may detect a signal from an electronic transmitter (e.g., RFID, Bluetooth Low Energy, WiFi, ultrasound, infrared, Light Fidelity, and the like) worn by the person detected, as shown at 402, indicating a person has entered the room of the patient. Computerized patient monitoring and facial recognition system, as shown at 404, receives the signal from the badge. If the person is a new caregiver or visitor, as shown at step 406, the person is registered in database 408. If the person is not a new caregiver or visitor, as shown at step 406, the person is not registered in the database 408.
In FIG. 5, a 3D motion sensor 504 may be co-located with a patient 502 to be monitored. The patient 502 to be monitored may be monitored in a variety of environments, including, without limitation, a hospital, a home, a hospice care facility, a nursing home, an assisted living facility, an outpatient medical care facility, and the like. The 3D motion sensor 504 may be positioned where it is likely to capture images of the face of the patient 502 to be monitored. For example, a 3D motion sensor 504 may be oriented to take images of a bed, chair, or other location where the patient 502 to be monitored may spend a significant amount of time. In some embodiments, the 3D motion sensor 504 may be oriented to take images of persons entering and exiting the room of the patient 502 to be monitored. In some embodiments, the 3D mention sensor 504 may be oriented to take images of items or equipment (e.g., medical devices) that may be located in the room of the patient 502 to be monitored. The 3D motion sensor 504 may be permanently installed, or may be temporarily set up in a room as needed. The patient 502 to be monitored may be under immediate medical care, e.g., in a medical facility under the supervision of a medical professional, or may not be under immediate care, e.g., in a home or other environment, possibly with a caregiver. A caregiver may be a medical professional or paraprofessional, such as an orderly, nurse's aide, nurse, or the like. A caregiver may also be a friend, relative, individual, company, or facility that provides assistance with daily living activities and/or medical care for individuals, such as individuals who are disabled, ill, injured, elderly, or otherwise in need of temporary or long-term assistance. In some instances, the person to be monitored may be self-sufficient and not under the immediate care of any other person or service provider.
The 3D motion sensor 504 may communicate data, such as images of the patient 502 being monitored or a visitor detected in the room, to a computerized patient monitoring system 506. The computerized patient monitoring system 506 is a computer programmed to monitor transmissions of data from the 3D motion sensor 504. The computerized patient monitoring system 506 may be integral to the 3D motion sensor 504 or a distinctly separate apparatus from the 3D motion sensor 504, possibly in a remote location from 3D motion sensor 504 provided that the computerized patient monitoring system 506 can receive data from the 3D motion sensor 504. The computerized patient monitoring system 506 may be located in the monitored person's room, such as a hospital room, bedroom, or living room. The computerized patient monitoring system 506 may be connected to a central video monitoring system 516. The computerized patient monitoring system 506 and central video monitoring system 516 may be remotely located at any physical locations so long as a data connection exists (USB, TCP/IP or comparable) between the computerized patient monitoring system 506, the central communication system 512 (if separate from computerized patient monitoring system 506), the central video monitoring system 516, and the 3D motion sensor(s) 504.
The computerized patient monitoring system 506 may receive data from 3D motion sensor 504 for a monitoring zone (i.e., the patient's room or area to be monitored). At step 508, the computerized patient monitoring system 506 may assess whether a visitor is detected in the room (via skeletal tracking or blob recognition). If a visitor is not detected in the room, the computerized patient monitoring system 506 may continue to analyze images in the monitoring zone as long as 3D motion sensor 504 continues to transmit data.
If a visitor is detected within the monitoring zone at step 508, computerized patient monitoring system 506 may, at step 510, determine whether the visitor in an authorized visitor. To do so, RTLS may determine whether a signal was detected, such as from a badge of the visitor, as shown at 509, indicating an authorized person has entered the room of the patient. If a signal is detected, the computerized patient monitoring system 506 continues monitoring. If no signal is detected, computerized patient monitoring system 506 may communicate an image of the visitor to central communication system 512. Central communication system 512 may be configured to send an alert of the unauthorized visitor to one or more designated recipients (e.g., caregiver(s) 520). Central communication system 512 may be an integral part of computerized patient monitoring system 506 and/or may be implemented using separate software, firmware and/or hardware, possibly physically remote from central communication system 512. When an alert is triggered, the alert may be sent, at least initially, to the patient 502 being monitored, to give the patient 502 being monitored an opportunity to respond before alerting the central video monitoring system 516 and/or caregiver(s) 520. For example, an audible message may be played in the room where patient 502 is being monitored, possibly asking something the visitor to, “Please show your identification.”
Shown as step 514 in FIG. 1, computerized patient monitoring system 506 can analyze subsequent image data from 3D motion sensor 504 for corrective action such as the unauthorized visitor adequately providing identification, such as by showing identifying or providing an indication consistent with a yes or no answer to determine if the action will be corrected. If 3D motion sensor 504 is equipped with microphones, computerized patient monitoring system 506 can analyze sound data for recognizable words, such as okay, yes, or no, help.
Central video monitoring system 516 may be alerted if no response is received at step 514, or if the response is unintelligible or indicates that the unauthorized visitor does not intent to comply. Alternately, or additionally, central video monitoring system 516 may be alerted with or even before patient 502, so that central video monitoring system 516 can determine whether the unauthorized visitor detected is, in fact, problematic. On receiving an alert, the central video monitoring system 516, or an attendant there, may view live image, video and/or audio feed from the 3D motion sensor 504, and evaluate whether the unauthorized visitor presents a danger to the patient and/or himself. If patient 502 has been alerted by the central communication system 512, central video monitoring system 516 or an attendant there can use the data from 3D motion sensor 504 to evaluate whether a response from patient 502 is indicates that unauthorized visitor is complying with identification requirements. Central video monitoring system 516 and/or computerized patient monitoring system 506 may analyze the response from patient 502 and/or unauthorized visitor, however, if the response does not include words or gestures recognizable by the computerized system, an attendant at central video monitoring system 516 may be able to interpret the person's response. If needed, the central video monitoring system 516 and/or the attendant could then approve alert(s) to appropriate caregiver(s) 520 and/or call for emergency assistance (e.g., send a request for security).
One or more caregiver(s) 520 local to patient 502 can be alerted with or even before patient 502 and/or central video monitoring system 516, so that the caregiver(s) 520 can assess what is happening in person. Or, monitored patient 502, caregiver(s) 520 and the central video monitoring system 1516 could all be alerted at the same time. The priority and timing of alerts to different individuals or stations can be configured in accordance with the needs and desires of a particular facility, experience with a particular monitored individual or type of patient, or any other criterion of the system owner or user. This is true for initial alerts as well as continuing alerts (e.g., if an unauthorized visitor is detected, and no response is received or observed) or repeated alerts (two or more distinct events where an unauthorized visitor is detected). The priority and timing of alerts to different individuals may be different for initial, continuing, and/or repeated alerts.
Data associated with alerts may be logged by computerized patient monitoring system 506 and/or central video monitoring system 516 in a database 518. Data associated with an alert may include, without limitation, the telemetry data from 3D motion sensor 504 that triggered the alert; buffered data preceding the telemetry data that triggered the alert; telemetry data subsequent to the alert; the number and substantive content of an alert; the individual(s) and/or groups to whom an alert was addressed; the response, if any, received or observed following an alert; and combinations thereof. In embodiments, the database 518 also stores information regarding authorized visitors and information (e.g., RFID transmitter identification).
As shown in FIG. 6, centralized monitoring system 606 may receive data from multiple computerized monitoring and communication systems 604A, 604B, 604C. For simplicity, the computerized communication system associated with each computerized monitoring system is shown as an integrated component of the computerized monitoring system. If desired, separate computerized communication systems and/or a shared computerized communication system could be used. Computerized monitoring and communication systems 604 receive data from 3D motions sensors 602A, 602B, 602C, which are, respectively, monitoring persons 601A, 601B, 601C. Data received by the centralized monitoring system 606 from computerized monitoring and communication systems 604A, 604B, 604C may routinely be displayed on centralized monitoring primary display 608. A single primary display 608 may display data from more than computerized monitoring and communication systems 604A, 604B, 604C, shown as view 700 in FIG. 7. Alternately, primary display 608 may comprise two or more distinct screens, each of which may display data from one or more computerized monitoring systems. As shown, the display for monitored person 701C has an open configuration window 710, which is described in greater detail below.
When the centralized monitoring system 606 receives an alert from any of the computerized monitoring and communication systems 604A, 604B, 604C, indicating that a monitored person 601A, 601B, 601C in in proximity to an unauthorized visitor, audio and/or alert information for that particular person and/or the unauthorized visitor may be displayed on the centralized monitoring alert display 612. An alert can be presented in a variety of formats. An alert may be a visual cue on screen at the centralized monitoring system 606, such as the specific camera view flashing or being highlighted in a color to draw attention to that display among others. An alert may be an audible sound (e.g., a voice or alarm type sound) at the centralized monitoring system 606, an audible sound at the computerized monitoring and communication system attached to the 3D motion sensor, a text message, an email, turning on a light or even running a program on a computer. Should the central monitoring station 150 receive alerts from more than one of the computerized monitoring and communication systems 604A, 604B, 604C, indicating that a person 601A, 601B, 601C in proximity to an unauthorized visitor, the centralized monitoring alert display 612 may display the video, audio and/or alerting information from all such instances at the same time. If no alert is received by the centralized monitoring station 606, it may be that nothing is displayed on the centralized monitoring alert display 612. Preferably, all monitored individual rooms can be displayed and visible on the centralized monitoring primary display 608 whether alerting or not. When an alert is generated, attention can be drawn to the particular camera on centralized monitoring primary display 608 and/or a duplicative display of the alerting camera can be displayed on a second separate computer monitor, e.g., the centralized monitoring alert display 612.
An electronic record of any alerts received, any responses to the alert observed or received, and/or any actions taken by the centralized monitoring system 606 can be stored in a database 614.
FIG. 7 shows an exemplary view for central monitoring primary display 700, including video data for multiple monitored persons 701A, 701B, and 701C displayed on a single screen. FIG. 8 shows an alternative view for central monitoring primary display 800, including image data for only monitored patient 801C. The view includes a skeletal FIG. 810, which may be identified by central video monitoring system, and used to track or “lock on to” the patient 801C. A skeletal FIG. 810 is shown in FIG. 8, however, alternate image analysis could be used, including, without limitation, blob recognition. No patient identification zones are marked in the image of FIG. 8. FIG. 9 shows an exemplary configuration menu 900, with an option 910 for configuring a face monitoring zone, an option 920 for configuring other saved zones, and an option 930 to clear all configured zones.
FIG. 10 shows view 1000 as it might appear on selecting a menu option to configure one or more zones. FIG. 10 shows a patient identification zone 1000 generally about the upper torso, shoulders, and head of a patient lying in a hospital bed. Patient identification zone 1000 may be configured by the computerized patient monitoring system. For example, patient identification zone 1000 may be defined as a fixed perimeter or volume around the head of a patient, as determined based on analysis using skeleton figure, blob recognition, and/or facial tracking. If configured by the computerized patient monitoring system 106, a user may be allowed to modify the system-configured patient identification zone 1000, or a user may be required or allowed to manually configure the patient identification zone 1000. The 3D motion sensor 104 may collect image and/or sound data for a broader portion of a room than just the patient identification zone 1000. The computerized patient monitoring system 106 may analyze only data related to the patient identification zone 1000, with or without capturing images and/or sound from a broader portion of the room. This may reduce total processing capacity required, as the most processing-intensive algorithms (e.g., facial tracking, identification and tracking of reference points) are run on a limited data set. Capturing broader image data may help provide context for an alert, e.g., at central video monitoring system. For example, using image data from most or all of the room, central video monitoring system or an attendant there may determine that it is unnecessary to send an alert to a caregiver if there is already a caregiver in the room and tending to the patient being monitored at the time of an alert. A patient identification zone 1000 may also help monitoring system “lock on” to a person, and help avoid situations where a patient who is very close to the person being monitored might be tracked after moving away from the person. If the patient moves out of patient identification zone 1000, but the person being monitored does not leave patient identification zone 1000, monitoring system will continue to monitor person in patient identification zone 1000.
Using facial recognition algorithms, the computerized patient monitoring system may identify key features of the face of patient being monitored. Key features may include, without limitation, the orbit of the eye socket(s), eyebrow(s), eyebrow ridge(s), the nose, the bridge of the nose, the mouth, top of the head, hairline, chin, ears, cheekbones, etc. The features used may vary with the kind of technology (e.g., visible vs. infrared light) and/or prominent or accessible features on patient.
The computerized patient monitoring system may use facial tracking rather than facial recognition, facial recognition implying that the software attempts to identify a particular person (e.g., Jane Doe) based on facial features, as opposed to recognizing a particular facial feature (e.g., an eye) using facial tracking. If desired, facial recognition algorithms could also be used, e.g., to confirm that the system has “locked on” to the intended person being monitored; or to confirm the identity of the person.
The computerized patient monitoring system may identify soft-tissue reference points on the face of monitored person. Exemplary soft-tissue reference points may generally outline the eyes and/or the mouth. Other exemplary soft-tissue reference points, which could be used with or in lieu of the eyes and/or mouth, include the jowls, flesh along the cheekbone, the neck, and the portion of the neck immediately under the chin. The eyes and/or mouth may be preferred as they are easily identified by facial tracking algorithms and tend to be readily visible even if the person being monitored is wearing a blanket or high-necked clothing.
If patient identification zone 1000 is configured by a user, the user may operate an input device to select a point on an image or video from the computerized patient monitoring station. The user may draw a perimeter defining a zone freehand, or may drag the input device (such as an electronic stylus or mouse pointer) from one point to another to define a diagonal axis for the perimeter of the zone. Other configuration options, including drag-and-drop templates and coordinate identification, could be used. A 2D monitoring zone can be operated as a perimeter, or a third dimension of depth can be specified. As with the perimeter, the computerized patient monitoring system can define or recommend a depth measurement, such as shown by label 1100 in FIG. 11, or the user can provide the depth measurement, as described below.
FIG. 12 shows a pop-up menu 1200 allowing a user to configure or reconfigure the depth of a patient identification zone. The exemplary pop-up menu 1200 solicits a depth parameter specified in millimeters (mm), however, any desired unit of measure could be used, including, without limitation, centimeters (cm), meters (m), inches, feet, and yards.
On setting a depth parameter, and while still in a configuration view, the depth of the patient identification zone may be visible as a label 1300, as shown in FIG. 13. The depth label 1300 may not be visible during routine monitoring and/or alert monitoring, so as not to obscure the person being monitored and/or other activity in any image data from 3D motion sensor.
FIG. 14 shows another menu 1400 from configuration view. As shown in FIG. 14, a user may be permitted to turn monitoring on or off (e.g., by “unchecking” both video feed and audio feed), or to turn off video feed only, or to turn off audio feed only, if audio feed is available. It may be desirable to disable audio feed, for example, at central video monitoring system, to prevent overlapping audio feeds from becoming unintelligible noise. If voice or word recognition algorithms are used, those algorithms may run at computerized patient monitoring system even if audio feed is disabled at a monitoring station, such as central video monitoring system. On alert or as desired, the audio feed could be enabled for one or more particular persons being monitored, e.g., to provide context for an alert. It may be desirable to disable audio and/or video feed to provide some privacy to the patient corresponding to the person being monitored. For example, it may be desirable to disable audio and/or video feed while the patient is being examined by a medical professional, or bathed, or while visitors are present. The need for computerized monitoring is somewhat reduced while the patient is interacting with medical professionals, caregivers, or visitors. However, if desired, the audio and/or video feed can be maintained even when there are other others with the patient corresponding to the person being monitored.
Although patient identification zone may be configured and operational, they may not be shown outside of the configuration screens for those zone, as in FIG. 14. That is, the zone may be configured and operational, but not superimposed on the images of patient, so as to permit an unobstructed view of patient, e.g., at central video monitoring system or while configuring other aspects of the monitoring system.
If the Device menu 1400 in FIG. 14 is selected, the user may see a pop-up menu 1500, as shown in FIG. 15. The use of pop-up, drop down, tabular, or other kinds of menus may be recommended based on, for example, the number and kinds of options associated with a particular menu. However, different kinds of menus could be presented based on user or facility preferences. Pop-up menu 1500 includes a number of tabs, from which a tab for Alerts 1510 has been selected in FIG. 15. The space within the Alerts window 1520 is blank, indicating that no alerts have been configured. If a user selects Add button 1530 at the bottom of the Alerts tab 1510, a new pop-up menu 1600 may appear, as shown in FIG. 12.
As shown in FIG. 16, pop-up menu 1620 further includes drop-down menus to configure an alert by specifying an event 1622, an action 1624, and, if applicable, an N/A field 1626. As with the kinds of menus, the particular words used to describe an event, action, and/or NA field may be modified to reflect the environment in which the system is being used, or the facility or personnel using the system or a particular station. For example, a system, station, or user interface may be configured for use in a hospital using clinical terminology. As another example, a remote central video monitoring system may have an attendant who is not a medical professional, and lay terminology might be used in lieu of or in addition to clinical terminology. Family or other non-professional and/or non-medical caregivers may have access to the monitoring system and/or serve as an attendant for a remote monitoring station, and the menus for those users may similarly use descriptive, non-clinical terminology in addition to or in lieu of clinical terminology. Different languages could also be used for different interfaces. As shown in FIG. 16, the monitoring system may include monitoring and/or alert functions unrelated to unauthorized visitors, as well as the “Visitor Present” option presented. If desired, other options may be removed from the drop-down menu to simplify user configuration choices for users who do not want or need access to the other functions. Changes to the menus, including changes to the range of menu options and the terminology used in the menus, may be configured when the system is installed or when access is provided to a specific user, and may not require or may not be available for further modification by routine system users.
On selection of an event 1622 in FIG. 16, the user may be able to select an action 1624, as shown in FIG. 17. Several of the options relate to alerts, e.g., to provide different audible signals to the 3D motion sensor and/or computerized patient monitoring system; to add or change a color border to a display of image data; to highlight or flash a display of image data; to log an alert, as in database; to send e-mail or SMS; or to provide other alerts. As shown in FIG. 17, the user has elected to highlight/flash 1712 a display of image data if event 1710 occurs, e.g., if a visitor is present.
As shown in FIG. 18, N/A field 1830 may be blank and/or inactive depending upon the event 1810 and action 1820 selected. In the example shown in FIG. 17, the option to highlight/flash an image display does not require further configuration, and so N/A field 1830 is blank and inactive, in that the user cannot input options for N/A field 1830. However, if the action was set to send an alert, for example, N/A field 1830 might become active and allow a user to designate a recipient and/or recipient group to whom the alert should be sent. If the user desires to send different kinds of alerts to different recipients or groups of recipients, multiple alerts could be configured, with each alert specifying a different action 1820 (e.g., send e-mail vs. send SMS) and/or a different recipient. As another example, the N/A field 1830 could be used to specify where to log the occurrence of an event, for example, if more than one database is available to the monitoring system, or if data for more than one monitored person is stored in the available database(s).
As shown in FIG. 19, after an alert has been configured, the configuration view may revert to alert tab 1910, now showing a brief description of configured alert 1922 in alerts window 1920. If additional alerts were configured, alerts window 1920 might display a selectable list of configured alerts, including configured alert 1922. Once configured, alerts may be edited or deleted using buttons 1930 or 1940, respectively. Edit button 1910 may re-open the configuration view shown in FIGS. 16-18, with the drop-down menus open to receive alternate selections.
FIG. 20 shows a view 2000 of image data from multiple 3D motion sensors monitoring persons 2010A, 2010B, and 2010C, as might appear on a central monitor primary display. The configuration window has been closed, providing an unobstructed view of monitored patients. Depending upon the configuration for primary display, each panel 2020, 2030, and 2040 may display live video, intermittent images (e.g., “still” shots from a video data feed) and/or audio data for monitored persons 2010A, 2010B, and 2010C, respectively.
The various computerized systems and processors as described herein may include, individually or collectively, and without limitation, a processing unit, internal system memory, and a suitable system bus for coupling various system components, including database 118, with a control server. Computerized patient monitoring system 106 and/or central video monitoring system 116 may provide control server structure and/or function. The system bus may be any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, and a local bus, using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, Enhanced ISA (EISA) bus, Video Electronic Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
The computerized systems typically include therein, or have access to, a variety of computer-readable media, for instance, database 118. Computer-readable media can be any available media that may be accessed by the computerized system, and includes volatile and nonvolatile media, as well as removable and non-removable media. By way of example, and not limitation, computer-readable media may include computer-storage media and communication media. Computer-readable storage media may include, without limitation, volatile and nonvolatile media, as well as removable and non-removable media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. In this regard, computer-storage media may include, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVDs) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage, or other magnetic storage device, or any other medium which can be used to store the desired information and which may be accessed by the control server. Computer-readable storage media excludes signals per se.
Communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and may include any information delivery media. As used herein, the term “modulated data signal” refers to a signal that has one or more of its attributes set or changed in such a manner as to encode information in the signal. By way of example, and not limitation, communication media includes wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared, and other wireless media. Combinations of any of the above also may be included within the scope of computer-readable media. The computer-readable storage media discussed above, including database 118, provide storage of computer readable instructions, data structures, program modules, and other data for the computerized systems. Computer readable instructions embodied on computer-readable storage media may be accessible by unauthorized visitor system 100 and/or component(s) thereof, and, when executed by a computer processor and/or server, may cause the system to function and/or perform the methods described herein.
The computerized systems may operate in a computer network using logical connections to one or more remote computers. Remote computers may be located at a variety of locations, for example, but not limited to, hospitals and other inpatient settings, veterinary environments, ambulatory settings, medical billing and financial offices, hospital administration settings, home health care environments, payer offices (e.g., insurance companies), home health care agencies, clinicians' offices and the clinician's home or the patient's own home or over the Internet. Clinicians may include, but are not limited to, a treating physician or physicians, specialists such as surgeons, radiologists, cardiologists, and oncologists, emergency medical technicians, physicians' assistants, nurse practitioners, nurses, nurses' aides, pharmacists, dieticians, microbiologists, laboratory experts, laboratory technologists, genetic counselors, researchers, veterinarians, students, and the like. The remote computers may also be physically located in non-traditional medical care environments so that the entire health care community may be capable of integration on the network. The remote computers may be personal computers, servers, routers, network PCs, peer devices, other common network nodes, or the like, and may include some or all of the elements described above in relation to the control server. The devices can be personal digital assistants or other like devices.
Exemplary computer networks may include, without limitation, local area networks (LANs) and/or wide area networks (WANs). Such networking environments are commonplace in offices, enterprise-wide computer networks, intranets, and the Internet. When utilized in a WAN networking environment, the control server may include a modem or other means for establishing communications over the WAN, such as the Internet. In a networked environment, program modules or portions thereof may be stored in the control server, in the database 118, or on any of the remote computers. For example, and not by way of limitation, various application programs may reside on the memory associated with any one or more of the remote computers. It will be appreciated by those of ordinary skill in the art that the network connections shown are exemplary and other means of establishing a communications link between the computers may be utilized.
In operation, a user may enter commands and information into the computerized system(s) using input devices, such as a keyboard, a pointing device (commonly referred to as a mouse), a trackball, a touch pad, a 3D Gesture recognition camera or motion sensor. Other input devices may include, without limitation, microphones, satellite dishes, scanners, or the like. In addition to or in lieu of a monitor, the computerized systems may include other peripheral output devices, such as speakers and a printer.
Many other internal components of the computerized system hardware are not shown because such components and their interconnection are well known. Accordingly, additional details concerning the internal construction of the computers that make up the computerized systems are not further disclosed herein.
Methods and systems of embodiments of the present disclosure may be implemented in a WINDOWS or LINUX operating system, operating in conjunction with an Internet-based delivery system, however, one of ordinary skill in the art will recognize that the described methods and systems can be implemented in any operating system suitable for supporting the disclosed processing and communications. As contemplated by the language above, the methods and systems of embodiments of the present invention may also be implemented on a stand-alone desktop, personal computer, cellular phone, smart phone, tablet computer, PDA, or any other computing device used in a healthcare environment or any of a number of other locations.
From the foregoing, it will be seen that this disclosure is well adapted to attain all the ends and objects hereinabove set forth together with other advantages which are obvious and which are inherent to the structure.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
Since many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

## Claims

1. A system for detecting unauthorized visitors, the system comprising:
one or more 3D motion sensors located to provide the one or more 3D motion sensors with a view of a person and surrounding area to be monitored, the 3D motion sensors configured to collect a series of images of the person and surrounding area;
a computerized patient monitoring system communicatively coupled to the one or more 3D motion sensors, the computerized monitoring system utilizing information received from the one or more 3D motion sensors to identify the person being monitored utilizing skeletal tracking and blob detection between two or more images in the series of images, and determine whether a visitor enters the view of the one or more 3D motion sensors;
a central communication system communicatively coupled to the computerized patient monitoring system, the central communication system configured to receive an indication from the computerized patient monitoring system if the visitor enters the view of the one or more 3D motion sensors and send an alert to one or more designated recipients if the visitor and the person are in proximity to each other; and
a central video monitoring system, comprising a primary display and an alert display, communicatively coupled to the computerized communication system, the central video monitoring system configured to display at least a portion of the series of images of the visitor, wherein if the computerized patient monitoring system detects an unauthorized visitor, the central communication system sends an alert to the central video monitoring system, and the central video monitoring system moves a display of at least a portion of the series of images of the visitor from the primary display to the alert display.

2. The system of claim 1, wherein the computerized patient monitoring system is further configured to identify a plurality of reference points on the face of the visitor and to compare positions, distances between, sizes, or shapes of the plurality of the reference points to positions, distances between, sizes, or shapes of a plurality of registered reference points on the face of registered visitors to determine if the visitor is a registered visitor, the plurality of registered reference points on the face of registered visitors being stored in a database.

3. The system of claim 1, further comprising determining the visitor and the person are in proximity to each other.

4. A method for detecting unauthorized visitors, the method comprising:
receiving from a 3D motion sensor an image of at least two persons detected in a room of a patient, a method of detecting the at least two persons comprising skeletal tracking and blob detection;
determining, by a computerized patient monitoring system communicatively coupled to the 3D motion sensor, the at least two persons are in proximity to each other;
alerting, by a central communication system communicatively coupled to the computerized patient monitoring system, one or more designated recipients based on the at least two persons being in proximity to each other;
alerting a central video monitoring system of an unauthorized visitor being within the designated proximity to the patient, the central video monitoring system comprising a primary display and an alert display; and
communicating the image of the unauthorized visitor to the central video monitoring system, the image of the unauthorized visitor being moved from a primary display to the alert display.

5. The method of claim 4, further comprising determining one of the at least two persons is a caregiver for the patient.

6. The method of claim 4, further comprising determining one of the at least two persons is an authorized visitor for the patient.

7. The method of claim 4, further comprising determining one of the at least two persons is an unauthorized visitor for the patient.

8. The method of claim 7, further comprising alerting a designated recipient of the unauthorized visitor.

9. The method of claim 4, further comprising suppressing the alert if one of the at least two persons is a caregiver for the patient or an authorized visitor for the patient.

10. The method of claim 4, wherein images for a plurality of people being monitored are displayed on a primary display at a central video monitoring system.

11. Non-transitory computer-readable storage media having embodied thereon instructions which, when executed by one or more computer processors, cause the processors to:
receive from a 3D motion sensor an image of a person detected in a room of a patient, the person being in proximity to the patient;
detect a signal from an electronic transmitter corresponding to the person detected in the room of the patient;
determine, utilizing skeletal tracking and blob detection based, if the person is a registered visitor;
alert one or more designated recipients if the person is not a registered visitor;
display series of images for a plurality of people being monitored on a primary display at a central video monitoring system;
alert the central video monitoring system if the person is determined to be an unauthorized visitor; and
upon receiving the alert, cause the central video monitoring system to duplicate the display of the series of images associated with the alert on a central video monitoring system alert display.

12. The computer-readable storage media of claim 11, wherein the instructions further cause the one or more computer processors to register the person if the person is not a registered visitor.