MONITORING PATIENT SUPPORT EXITING AND INITIATING RESPONSE

• US 20090119843A1
• Filed: 11/11/2008
• Published: 05/14/2009
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: Careview Communications Incorporated
• Original Assignee: Valence Broadband, Inc.
• Inventors: Rodgers, Mark E., Parsell, Douglas E.
• Granted Patent: US 7,987,069 B2
• Time in Patent Office: Days
• US Class Current: 5/611
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/1115 Monitoring leaving of a patient support, e.g. a bed or a wheelchair
• CPC Class Codes: A61B 5/1116 Determining posture transitions
• CPC Class Codes: A61B 5/1117 Fall detection
• CPC Class Codes: A61B 5/1123 Discriminating type of movement, e.g. walking or running A61B5/1116, A61B5/112 take precedence
• CPC Class Codes: A61B 5/6822 Neck
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/6829 Foot or ankle
• CPC Class Codes: A61G 2203/34 for pressure
• CPC Class Codes: A61G 2203/36 for motion
• CPC Class Codes: A61G 7/012 raising or lowering of the whole mattress frame A61G7/005, A61G7/008 take precedence
• CPC Class Codes: A61G 7/018 Control or drive mechanisms
• CPC Class Codes: A61G 7/0509 sliding or pivoting downwards
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: G16H 50/70 for mining of medical data, e.g. analysing previous cases of other patients
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

The present invention relates to systems and methods for monitoring patient support exiting and initiating a response. Movement data is accessed from sensors (e.g., cameras) that are monitoring a patient resting on a support platform. A motion capture pattern summary is generated from the accessed movement data. The motion capture pattern summary is compared to one or more movement pattern data sets in a library of movement pattern data sets. It is determined that the motion capture pattern summary is sufficiently similar to one of the one or more movement pattern data sets in the library of movement pattern data sets. From the determined similarity it is determined that the patient is attempting to exit the support platform. Remedial measures are initiated to prevent the detected platform support exiting attempt.

Claims

1. At a computer system, a method for detecting a support platform exiting event, the method comprising:

accessing movement data from sensors that are monitoring a patient resting on a support platform, the movement data indicative of movement in one or more portions of the patient'"'"'s body;

generating a motion capture pattern summary for the patient from the accessed movement data, the motion capture pattern summary capturing movements for the one or more portions of the patient'"'"'s body;

comparing the motion capture pattern summary to one or more movement pattern data sets in a library of movement pattern data sets, movement pattern data sets in the library of movement pattern data sets representative of movements having some probability of indicating platform support exiting;

determining that the motion capture pattern summary is sufficiently similar to one of the one or more movement pattern data sets in the library of movement pattern data sets; and

detecting that the patient is attempting to exit the support platform based on the determined similarity.

2. The method as recited in claim 1, wherein accessing data from sensors that are monitoring a patient resting on a support platform comprises accessing video data from one or more cameras that are monitoring the patient resting on the support platform.

3. The method as recited in claim 1, wherein accessing data from sensors that are monitoring a patient resting on a support platform comprises accessing data from a light beam matrix.

4. The method as recited in claim 1, wherein accessing data from sensors that are monitoring a patient resting on a support platform comprises accessing data from an RFID grid system.

5. The method as recited in claim 1, wherein generating a motion capture pattern summary for the patient from the accessed movement data comprises digitizing the accessed movement data.

6. The method as recited in claim 1, wherein generating a motion capture pattern summary for the patient from the accessed movement data comprises grouping the accessed movement data into individual clusters of activity.

7. The method as recited in claim 1, wherein comparing the motion capture pattern summary to one or more movement pattern data sets in a library of movement pattern data sets comprises an act comparing the motion capture pattern summary to one or more movement pattern data sets generally indicative of platform support exiting.

8. The method as recited in claim 1, wherein comparing the motion capture pattern summary to one or more movement pattern data sets in a library of movement pattern data sets comprises an act comparing the motion capture pattern summary to one or more movement pattern data sets specifically indicative of platform support exiting by the patient.

9. The method as recited in claim 1, wherein determining that the motion capture pattern summary is sufficiently similar to one of the one or more movement pattern data sets in the library of movement pattern data sets comprises an act of determining that the motion capture pattern summary is sufficiently similar to one or more of:

a bed rail reach, an upper body shift, a bedrail engagement, restless leg movement, a leg sweep, and a body roll.

10. The method as recited in claim 1, wherein detecting that the patient is attempting to exit the support platform based on the determined similarity comprises:

accessing a probability factor corresponding to the movement pattern data set; and

determining that the accessed probability factor satisfies a configured probability threshold indicative of a bed exiting event.

11. The method as recited in claim 1, wherein detecting that the patient is attempting to exit the support platform based on the determined similarity comprises:

accessing a general probability factor corresponding to the movement pattern data set, the general probability factor generally indicative of the probability of the detected movement corresponding to a bed exiting event;

accessing a behavioral weighting factor for the patient, the value of the behavioral weighting factor based on prior detections of the movement pattern set being confirmed as bed exiting attempts by the patient;

combining the probability factor and the behavioral weighting factor into a patient specific probability factor; and

determining that the patient specified probability factor satisfies a configured probability threshold indicative of a bed exiting event.

12. The method as recited in claim 1, further comprising lowering the height of the support platform to reduce the potential fall distance of the patient in response to detecting that the patient is attempting to exit the support platform.

13. The method as recited in claim 12, wherein lowering the height of the support platform from the specified height to a lower height to reduce the potential fall distance of the patient comprises lowering the support platform of a bed, wherein the bed further comprises:

a plurality of platform lifts, each platform lift including;

a lift component configured to raise and lower in response to an appropriate signal, including rapidly lowering to essentially floor level in response to a signal indicating a potential bed exiting event;

a channel permitting external components attached to the lift component to raise and lower with the lift component; and

a corresponding plurality of connecting brackets affixed to the support platform, each connecting bracket including a connection plate, each connection plate extending into a channel of a platform lift and attached to a lift component of a corresponding platform lift; and

wherein the support platform is lowered by appropriately signaling each of the plurality of lift platforms to lower the support platform.

14. The method as recited in claim 13, further comprising raising bedrails of the support platform to attempt to prevent the patient from exiting the support platform in response to detecting that the patient is attempting to exit the support platform.

15. The method as recited in claim 1, further comprising electronically notifying a care giver that the support platform is being and/or was lowered.

16. A computer program product for use at a computer system, the computer program product for implementing a method for detecting a support platform exiting event, the computer program product comprising one or more computer-readable medium having stored thereon computer-executable instructions that, when executed at a processor, cause the computer system to perform the following:

access movement data from sensors that are monitoring a patient resting on a support platform, the movement data indicative of movement in one or more portions of the patient'"'"'s body;

generate a motion capture pattern summary for the patient from the accessed movement data, the motion capture pattern summary capturing movements for the one or more portions of the patient'"'"'s body;

compare the motion capture pattern summary to one or more movement pattern data sets in a library of movement pattern data sets, movement pattern data sets in the library of movement pattern data sets representative of movements having some probability of indicating platform support exiting;

determine that the motion capture pattern summary is sufficiently similar to one of the one or more movement pattern data sets in the library of movement pattern data sets; and

detect that the patient is attempting to exit the support platform based on the determined similarity.

17. The computer program product as recited in claim 16, wherein computer-executable instructions that, when executed at a processor, cause the computer system to detect that the patient is attempting to exit the support platform based on the determined similarity comprise computer-executable instructions that, when executed at a processor, cause the computer system to:

access a probability factor corresponding to the movement pattern data set; and

determine that the accessed probability factor satisfies a configured probability threshold indicative of a bed exiting event.

18. The computer program product as recited in claim 16, wherein computer-executable instructions that, when executed at a processor, cause the computer system to detect that the patient is attempting to exit the support platform based on the determined similarity comprise computer-executable instructions that, when executed at a processor, cause the computer system to:

access a general probability factor corresponding to the movement pattern data set, the general probability factor generally indicative of the probability of the detected movement corresponding to a bed exiting event;

access a behavioral weighting factor for the patient, the value of the behavioral weighting factor based on prior detections of the movement pattern set being confirmed as bed exiting attempts by the patient;

combine the probability factor and the behavioral weighting factor into a patient specific probability factor; and

determine that the patient specified probability factor satisfies a configured probability threshold indicative of a bed exiting event.

19. At a computer system, a method for responding to a support platform exiting event, the method comprising:

accessing patient movement data from sensors that are monitoring a patient resting on a support platform, the patient movement data indicative of movement in one or more portions of the patient'"'"'s body, the support platform being a specified height above floor level;

determining that the accessed patient movement data is sufficiently similar to one or more movement pattern data sets in a library of movement pattern data sets, movement pattern data sets in the library of movement pattern data sets indicative of movements having an increased probability of platform support exiting; and

lowering the height of the support platform from the specified height to a lower height to reduce the potential fall distance of the patient in response to determining that the access patient movement data is sufficiently similar to the one or more movement pattern data sets in the library of movement pattern data sets.

20. The method as recited in claim 19, wherein accessing patient movement data from sensors that are monitoring a patient resting on a support platform comprises access patient movement data from cameras that are monitoring the patient.

21. The method as recited in claim 19, wherein accessing patient movement data from sensors that are monitoring a patient resting on a support platform comprises accessing patient movement data from an ultrasound grid system.

22. The method as recited in claim 19, wherein determining that the accessed patient movement data and is sufficiently similar to one or more movement pattern data set comprises:

digitizing the accessed movement data;

grouping the digitized accessed movement data into individual clusters of activity; and

comparing the clusters of activity to the or more movement pattern data sets.

23. The method as recited in claim 19, wherein determining that the accessed patient movement data and is sufficiently similar to one or more movement pattern data set comprises:

accessing a probability factor corresponding to one of the one or more movement pattern data sets; and

determining that the accessed probability factor satisfies a configured probability threshold indicative of a bed exiting event.

24. The method as recited in claim 19, wherein determining that the accessed patient movement data and is sufficiently similar to one or more movement pattern data set comprises:

accessing a general probability factor corresponding to one of the one or more movement pattern data sets, the general probability factor generally indicative of the probability of the detected movement corresponding to a bed exiting event;

accessing a behavioral weighting factor for the patient, the value of the behavioral weighting factor based on prior detections of the movement pattern set being confirmed as bed exiting attempts by the patient;

combining the probability factor and the behavioral weighting factor into a patient specific probability factor; and

determining that the patient specified probability factor satisfies a configured probability threshold indicative of a bed exiting event.

25. The method as recited in claim 19, wherein lowering the height of the support platform from the specified height to a lower height to reduce the potential fall distance of the patient comprises signaling a release valve to release compressed air from one or more pneumatic platform support lifts supporting the platform support at the specified height.

26. The method as recited in claim 19, wherein lowering the height of the support platform from the specified height to a lower height to reduce the potential fall distance of the patient comprises signaling a release valve to release fluid from one or more hydraulic platform support lifts supporting the platform support at the specified height.

27. The method as recited in claim 19, wherein lowering the height of the support platform from the specified height to a lower height to reduce the potential fall distance of the patient comprises signaling a driver motor to lower a platform support lift selected from among:

a screw driven platform support and a chain driver platform support lift.

28. The method as recited in claim 19, wherein lowering the height of the support platform from the specified height to a lower height to reduce the potential fall distance of the patient comprises lowering the height of the support platform form the specified height to between zero to three inches above floor level in two seconds or less.

29. At a computer system, a method for responding to a patient attempting to exit a bed in a healthcare facility, the bed including:

a support platform, the support platform being a specified height above floor level;

a plurality of platform lifts, each platform lift including;

a pneumatic lift component configured to raise and lower in response to changes in compressed air supplied to the platform lift, including rapidly lowering to essentially floor level in response to a signal indicating a potential bed exiting event;

a spring configured to lower the rate of deceleration of the corresponding lift component when the lift component is rapidly lowered to essentially floor level; and

a channel permitting external components attached to the lift component to raise and lower with the lift component;

a corresponding plurality of connecting brackets affixed to the support platform, each connecting bracket including a connection plate, each connection plate extending into a channel of a platform lift and attached to a pneumatic lift component of a corresponding platform lift; and

a conduit connected to each of the platform lifts, the conduit for transferring compressed air at each platform lift used to regulate the height each of the plurality of lift components respectively; and

a release valve couple to the conduit for releasing compressed air from the pneumatic lift components,

the method comprising;

accessing movement data from sensors that are monitoring a patient resting on a support platform, the movement data indicative of movement in one or more portions of the patient'"'"'s body;

generating a motion capture pattern summary for the patient from the accessed movement data, the motion capture pattern summary capturing movements for the one or more portions of the patient'"'"'s body;

comparing the motion capture pattern summary to one or more movement pattern data sets in a library of movement pattern data sets, movement pattern data sets in the library of movement pattern data sets indicative of movements having an increased probability of platform support exiting;

determining that the motion capture pattern summary is sufficiently similar to one of the one or more movement pattern data sets in the library of movement pattern data sets; and

signaling the release valve to release compressed air from the pneumatic lift components to lower the height of the support platform from the specified height to the a lower height to reduce the potential fall distance of the patient subsequent to determining that the motion capture pattern summary is sufficiently similar to one of the one or more movement pattern data sets in the library of movement pattern data sets.

30. The method as recited in claim 29, wherein generating a motion capture pattern summary for the patient from the accessed movement data comprises:

digitizing the accessed movement data; and

grouping the digitized accessed movement data into individual clusters of activity.

31. The method as recited in claim 29, further comprising prior to signaling the release valve:

accessing a probability factor corresponding to the movement pattern data set; and

determining that the accessed probability factor satisfies a configured probability threshold indicative of a bed exiting event.

32. The method as recited in claim 29, further comprising prior to signaling the release valve:

accessing a general probability factor corresponding to the movement pattern data set, the general probability factor generally indicative of the probability of the detected movement corresponding to a bed exiting event;

accessing a behavioral weighting factor for the patient, the value of the behavioral weighting factor based on prior detections of the movement pattern set being confirmed as bed exiting attempts by the patient;

combining the probability factor and the behavioral weighting factor into a patient specific probability factor; and

determining that the patient specified probability factor satisfies a configured probability threshold indicative of a bed exiting event.