Method for operating a monitoring system

• US 10,098,572 B2
• Filed: 07/13/2010
• Issued: 10/16/2018
• Est. Priority Date: 07/20/2009
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Schwenk, Marcus, Dubielczyk, Alexander
• Primary Examiner(s): Kahelin, Michael
• Assistant Examiner(s): JIAN, SHIRLEY XUEYING
• Application Number:
  US13/384,244
• Publication Number:
  US 20120123226A1
• Time in Patent Office: 3,017 Days
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/1118 Determining activity level
• CPC Class Codes: A61B 5/1122 of movement trajectories
• 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 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured

Abstract

For saving power in a monitoring system for monitoring physiological data of a patient, motion activity data of the patient is obtained and measurements of physiological data of the patient are initiated, only when the motion activity is both non-zero and below a selected threshold.

Claims

1. A method for operating a monitoring system for monitoring physiological data of a patient, comprising:

with non-invasive motion detector removably mounted to the patient, obtaining motion activity data indicative of patient movement;

with an analysis unit, analyzing the motion activity data to determine whether motion activity is both non-zero and below a selected threshold;

activating a non-invasive physiological detector that is removably mounted to the patient with power from a battery to acquire cardiac data of the patient only when the motion activity is both non-zero and below the selected threshold; and

during an ongoing measurement of the cardiac data, in response to the motion activity increasing above or equal to the selected threshold, deactivating the physiological detector and stopping the acquisition of the cardiac data.

2. The method according to claim 1, further including:

scheduling points in time for the physiological detector to acquire the cardiac data;

in response to the motion activity exceeding the selected threshold advancing, deferring, or skipping one or more of the scheduled points in time; and

in response to the motion activity being zero, advancing, deferring, or skipping one or more of the scheduled points in time.

3. The method according to claim 2, wherein at least one of the scheduled point in time for the acquisition of the cardiac data is alterable only within a configurable acquisition window enclosing the scheduled point in time.

4. The method according to claim 1, wherein a duration of the acquisition of the cardiac data is altered in accordance with the motion activity data.

5. The method according to claim 1, wherein obtaining the motion activity data includes obtaining a motion activity pattern characteristic of the motion activity pattern;

and

wherein analyzing the motion activity data includes;

analyzing the motion activity pattern.

6. The method according to claim 1, further including:

analyzing the acquired physiological data, wherein a method of analyzing the measured physiological data includes selecting an analysis algorithm from a plurality of analysis algorithms in accordance with the motion activity, wherein the algorithms require differing amounts of computing power and are susceptible to different levels of motion artifacting.

7. The method according to claim 1, further including:

providing scheduling information to at least one device.

8. A non-transitory computer readable medium storing a computer program configured to control a processor to carry out the method of claim 1.

9. The method according to claim 1, further including:

deactivating the physiological detector and stopping the acquisition of the cardiac data by prohibiting power from the battery from being transmitted to the non-invasive physiological detector.

10. A method for operating a monitoring system for monitoring physiological data of a patient, comprising:

with a motion detector, obtaining motion activity data indicative of patient movement;

activating a physiological detector with power from a battery to acquire physiological data of the patient at scheduled points in time;

shortening a scheduled acquisition of physiological data, in response to the motion activity being non-zero and below the selected threshold at a first one of the scheduled points in time,

delaying or removing one of the scheduled points in time for the acquisition of physiological data in response to the motion activity being above or equal to the selected threshold at a second one of the scheduled points in time, and

delaying or removing one of the scheduled points in time for the acquisition of physiological data in response to the motion activity being nil at a third one of the scheduled points in time.

11. A method for operating a monitoring system for monitoring physiological data of a patient, comprising:

with a motion detector, obtaining a patient motion activity pattern indicative of patient movement;

with an analysis unit, analyzing the patient motion activity pattern characteristics by comparing the patient motion activity pattern with selected pattern characteristics to project a point in time when the patient motion activity will be both non-zero and below a selected threshold, and

activating a physiological detector with power from a battery to acquire the physiological data at the projected point in time.

12. A monitoring system for monitoring physiological data of a patient, comprising:

a non-invasive motion detector configured to be removably attached to a patient to sense motion activity of the patient;

at least one non-invasive physiological data detector configured to be removably attached to a patient to measure physiological data of the patient; and

a controller configured to;

receive the sensed motion activity from the motion detector;

analyze the received motion activity to determine whether the motion activity is both below a selected threshold and non-zero;

activate the physiological data detector to measure physiological data only if the motion activity is non-zero and below the selected threshold; and

during an ongoing measurement of the cardiac data, in response to the motion activity increasing above or equal to the selected threshold, deactivating the physiological detector and stopping the acquisition of the cardiac data.

13. The system according to claim 12, wherein the controller includes a processor and is further configured to:

schedule points in time for the at least one physiological data detector to measure the physiological data based on analyzing the received motion activity; and

delay or remove one of the scheduled points in time for a measurement of physiological data in response to the motion activity being nil.

14. The system according to claim 12, wherein the controller is further configured to:

adjust an amount of the physiological data measured in accordance with the sensed motion activity.

15. A system for monitoring physiological data of a patient, comprising:

a non-invasive motion detector configured to sense motion activity of the patient;

at least one non-invasive physiological data detector configured to measure physiological data of the patient;

a processor configured to;

receive the sensed motion activity of the motion detector,

activate the physiological data detector to measure physiological data if the motion activity is non-zero and below a selected threshold,

select one of a plurality of analysis methods for analyzing the measured physiological activity, the plurality of analysis methods consuming varying levels of power and being susceptible to difference levels of motion artifacts, the one of the analysis methods being selected based on power consumption and a level of the sensed motion activity to lower both motion artifacts in the analyzed physiological data and power consumption.

16. A battery powered monitoring system for monitoring physiological data of a patient comprising:

a motion detector configured to sense motion activity of the patient;

at least one physiological data detector configured to measure physiological data of the patient; and

a processor configured to;

receive the sensed motion activity from the motion detector;

analyze the received motion activity;

not activate the physiological data detector to initiate a measurement of the physiological data when the sensed motion activity is nil to preserve the battery life;

not activate the physiological data detector when the sensed motion activity meets or exceeds a threshold to preserve battery life;

activate the physiological data detector to make a measurement of the physiological data during times in which the sensed motion activity is between nil and the threshold;

adjust an amount of the physiological data measured when the physiological data detector is active based on the analysis of the sensed motion; and

during an ongoing measurement of the cardiac data, in response to the motion activity increasing above or equal to the selected threshold, deactivating the physiological detector and stopping the acquisition of the cardiac data.

17. The system according to claim 16, wherein the processor is configured to analyze the motion activity by:

determining a pattern of the sensed motion activity; and

performing a pattern analysis on the determined pattern.

18. The system according to claim 17, wherein the pattern analysis includes comparing the motion activity pattern with preselected pattern characteristics to determine whether the motion activity is nil or above the threshold.

19. The system according to claim 16, further including:

a memory configured to store a plurality of physiological data analysis algorithms, the algorithms using different amounts of battery power and having different susceptibility to motion artifacts;

wherein the processor is configured to select among the algorithms based on the analyzed motion activity to select an algorithm which minimizes motion artifacts and battery power usage.

20. The system according to claim 16, wherein the motion detector is non-invasive and the physiological data detector is a non-invasive heart monitor.