Systems, devices and methods for managing pressurization timers for monitoring and/or managing a person's position
A system for monitoring a person may include a person-worn sensor device including at least one sensor (e.g., at least one accelerometer, magnetometer, altimeter, etc.) configured to collect sensor data and a processor to process data from the person-worn sensor device. The processor may be configured to determine or access an orientation of a physical support apparatus (e.g., bed, table, wheelchair, chair, sofa, or other structure for supporting the person), receive sensor data collected by the person-worn sensor device, calculate an orientation of the person relative to the physical support apparatus based on (a) the orientation of the physical support apparatus and (b) the sensor data collected by the person-worn sensor device, and identify, based on the determined orientation of the person relative to the physical support apparatus, a physical support apparatus exit condition indicating an occurrence or anticipated occurrence of the person exiting the physical support apparatus.
1. A system for automated monitoring of a person's position, comprising:
a wearable sensor device configured to be secured to or otherwise worn by the person;
at least one sensor provided in the wearable sensor device and configured to generate sensor data regarding an orientation of the person; and
a processor configured to:
monitor the orientation of the person over time based on the sensor data generated by the at least one sensor;
manage an accumulated time counter associated with a particular orientation of the person, including:
increasing the accumulated time counter while the person is positioned in the particular orientation, as determined based on the sensor-based monitored orientation of the person; and
decreasing the accumulated time counter while the person is not positioned in the particular orientation, as determined based on the sensor-based monitored orientation of the person; and
generate a notification based on a state of the accumulated time counter.
2. The system of claim 1 , wherein decreasing the accumulated time counter while the person is not positioned in the particular orientation comprises gradually decreasing the accumulated time counter at a defined depressurization rate.
3. The system of claim 1 , wherein the processor is configured to increase the accumulated time counter at a defined pressurization rate and decrease the accumulated time counter at a defined depressurization rate, wherein the depressurization rate is different than the pressurization rate.
4. The system of claim 3 , wherein the depressurization rate for decreasing the accumulated time counter is greater than the pressurization rate for increasing the accumulated time counter.
5. The system of claim 1 , wherein the processor is configured to:
compare the accumulated time counter to a pressurization threshold defined by a turn protocol for the person; and
generate a notification if the accumulated time counter exceeds the pressurization threshold.
6. The system of claim 1 , wherein the controller is configured to:
increase the accumulated time counter at a defined pressurization rate and decrease the accumulated time counter at a defined depressurization rate; and
dynamically adjust at least one of the pressurization rate and the depressurization rate.
7. The system of claim 1 , wherein the particular orientation comprises a defined rotational range of the person's body.
8. The system of claim 7 , wherein the processor is configured to:
identify a rotation of the person in the particular orientation;
determine a degree of the identified rotation; and
determine whether the person has moved out of the particular orientation based on the determined degree of rotation.
9. The system of claim 1 , comprising an audible or visual output device configured to output the notification generated by the processor.
10. The system of claim 1 , wherein the processor is provided in the wearable sensor device.
11. The system of claim 1 , wherein the processor is provided in a computer system or device distinct from the wearable sensor device.
12. The system of claim 1 , comprising a display device; and
wherein the processor is configured to control the display device to display a current orientation and a recorded turn history of the person.
13. The system of claim 1 , comprising a display device; and
wherein the processor is configured to control the display device to display a current status of the accumulated time counter.
14. The system of claim 1 , comprising a display device; and
wherein the processor is configured to:
compare the accumulated time counter with a predetermined accumulated time threshold; and
control the display device to indicate the accumulated time counter exceeding the predetermined accumulated time threshold.
15. The system of claim 1 , comprising a display device; and
wherein the processor is configured to:
compare the accumulated time counter to a pressurization threshold to determine a remaining time until a next turn, as defined by a turn protocol for the person; and
control the display device to visually indicate the remaining time until the next turn.
16. The system of claim 15 , wherein controlling the display device to visually indicate the remaining time until the next turn comprises dynamically changing a displayed color as a function of the remaining time until the next turn.
17. The system of claim 1 , comprising a display device; and
wherein the processor is configured to
compare the accumulated time counter to a pressurization threshold to determine a time the person has been overdue for a turn, as defined by a turn protocol for the person; and
control the display device to visually indicate the time the person has been overdue for a turn.
18. A system for automated monitoring of a person's position, comprising:
a wearable sensor device configured to be secured to or otherwise worn by the person;
at least one sensor provided in the wearable sensor device and configured to generate sensor data regarding an orientation of the person; and
a processor configured to:
monitor the orientation of the person over time based on the sensor data generated by the at least one sensor;
monitor the sensor data generated by the at least one sensor;
determine whether the person is in a particular orientation based on the monitored sensor data;
control a time counter associated with the particular orientation, including at least one of (a) increasing the time counter at a rate of increase while the person is positioned in the particular orientation or (b) decreasing the time counter at a rate of decrease while the person is not positioned in the particular orientation;
dynamically adjust at least one of the rate of increase or the rate of decrease of the time counter as a function of at least one factor selected from the group consisting of (a) a time of day, (b) a type of support surface on which the person is supported, (c) a defined risk level for the person, (d) a health status of the person, (e) a presence of a pressure ulcer on the person, (f) caregiver availability information, (g) a parameter of at least one orientation change of the person, and (h) an orientation history of the person based on the monitored sensor data;
control the time counter using the dynamically adjusted the rate of increase or rate of decrease; and
generate a visual or audible notification based on the time counter.
19. The system of claim 18 , wherein the processor is configured to:
determine a magnitude of an orientation change of the person; and
dynamically adjust at least one of the rate of increase or the rate of decrease of the time counter as a function of the determined magnitude of the orientation change.
20. The system of claim 18 , wherein determining a magnitude of an orientation change of the person comprises determining a degree of rotation of the person around at least one axis.
21. The system of claim 20 , wherein the processor is configured to increase the rate of decrease of the time counter as a function of an increased degree of rotation of the person.
22. The system of claim 18 , wherein the processor is configured to:
determine a frequency of orientation changes of the person; and
dynamically adjust at least one of the rate of increase or the rate of decrease of the time counter as a function of the determined frequency of orientation changes.
23. A system for automated monitoring of a person's position, comprising:
a wearable sensor device configured to be secured to the person or secured to or carried in an article worn by the person;
at least one sensor provided in the wearable sensor device and configured to generate sensor data regarding an orientation of the person; and
a processor configured to:
monitor the orientation of the person over time based on the sensor data generated by the at least one sensor;
manage a plurality of accumulated time counters, each corresponding with one of a plurality of different orientations of the person, wherein managing each accumulated time counter corresponding with one of the plurality of different orientations comprises:
increasing the accumulated time counter while the person is positioned in the corresponding orientation of the person, as determined based on the sensor-based monitored orientation of the person; and
decreasing the accumulated time counter while the person is not positioned in the corresponding orientation of the person, as determined based on the sensor-based monitored orientation of the person; and
generate a visual or audible notification based on a state of at least one of the plurality of accumulated time counters.
24. The system of claim 23 , wherein the processor is configured to, for each accumulated time counter:
increase the accumulated time counter at a defined rate of increase while the person is positioned in the corresponding orientation of the person; and
decreasing the accumulated time counter at a defined rate of decrease while the person is not positioned in the corresponding orientation of the person; and
wherein for a first and a second accumulated time counter of the plurality of accumulated time counters corresponding with a first and a second orientation of the plurality of different orientations:
the defined rate of increase of the first accumulated time counter differs from the defined rate of increase of the second accumulated time counter; and/or
the defined rate of decrease of the first accumulated time counter differs from the defined rate of decrease of the second accumulated time counter.
25. The system of claim 23 , wherein, for a respective accumulated time counter corresponding with a respective orientation of the person, decreasing the accumulated time counter while the person is not positioned in the corresponding respective orientation of the person comprises gradually decreasing the respective accumulated time counter at a defined depressurization rate.
26. The system of claim 25 , wherein:
for the respective accumulated time counter corresponding with the respective orientation of the person, increasing the accumulated time counter while the person is positioned in the corresponding respective orientation of the person comprises gradually increasing the respective accumulated time counter at a defined pressurization rate; and
the depressurization rate is different than the pressurization rate.
27. The system of claim 26 , wherein the depressurization rate is greater than the pressurization rate.
28. The system of claim 25 , wherein the processor is configured to:
compare the respective accumulated time counter to a pressurization threshold defined by a turn protocol for the person; and
cause a display device to display a notification if the respective accumulated time counter exceeds the pressurization threshold.
29. The system of claim 23 , comprising a display device configured to display a status of each of the plurality of accumulated time counters.
30. The system of claim 23 , wherein the processor is provided in a computer system or device distinct from the wearable sensor device.