SYSTEMS AND METHODS FOR MONITORING PAIN MANAGEMENT

• US 20100249543A1
• Filed: 03/31/2010
• Published: 09/30/2010
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Nellcor Puritan Bennett Ireland
• Original Assignee: Nellcor Puritan Bennett Ireland
• Inventors: Addison, Paul Stanley, Watson, James N., Sethi, Rakesh, Edney, Paul A.
• Granted Patent: US 8,814,791 B2
• Time in Patent Office: Days
• US Class Current: 600/301
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/4824 Touch or pain perception evaluation A61B5/4821 takes precedence
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F
• CPC Class Codes: A61B 5/726 using Wavelet transforms
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

The present disclosure relates to systems and methods for monitoring pain management using measurements of physiological parameters based on a PPG signal. A reference physiological parameter may be compared against a later measurement to identify a change in condition that may indicate a pain management problem.

Claims

1. A method for monitoring pain management, comprising:

receiving, at a processor, a first effort measurement;

generating, using a processor, a PPG waveform based at least in part on the PPG signal;

analyzing, using the processor, one or more features within the PPG signal;

determining, using the processor, a second effort measurement based at least in part on the one or more analyzed features;

comparing, using the processor, the second effort measurement and at least the first effort measurement; and

if the second effort measurement differs from the first effort measurement by a selected value, generating a signal.

2. The method of claim 1 further comprising generating, using the processor, a scalogram based at least in part on the PPG signal.

3. The method of claim 1 wherein the receiving a first effort measurement comprises receiving an input indicating an effort range, or receiving reference effort information based on the PPG signal.

4. The method of claim 1 wherein the signal indicates at least one of the group of:

an alarm, a request to provide pain management, and a request to provide sedation.

5. The method of claim 1, further comprising, if the second effort measurement differs from the first effort measurement by a selected value, automatically providing pain management or sedation by sending a signal to a pain management controller indicating a request for pain management or sedation.

6. The method of claim 5, further comprising:

determining, using the processor, a third effort measurement based at least in part on the PPG signal; and

determining, using the processor, an effectiveness of the pain management or sedation based at least in part on the second effort measurement and the third effort measurement.

7. The method of claim 6, wherein the determining, using the processor, the effectiveness of the pain management or sedation is further based at least in part on data indicating a blood pressure measurement or a respiration rate.

8. A method for monitoring pain management, comprising:

analyzing, using a processor, one or more features of a PPG signal;

determining, using the processor, a first effort measurement based at least in part on the one or more analyzed features of the PPG signal;

receiving information at the processor indicating that pain management or sedation has been administered to a patient;

determining, using the processor, a second effort measurement based at least in part on the PPG signal at a time after the pain management or sedation has been administered to a patient; and

determining, using the processor, an effectiveness of the pain management or sedation based at least in part on a comparison of the first effort measurement and the second effort measurement.

9. The method of claim 8 further comprising, if the pain management or sedation is determined to not be effective:

generating a signal comprising at least one of the group of;

indicating an alarm, indicating a request to provide pain management, and indicating a request to provide sedation.

10. The method of claim 8, wherein the determining, using the processor, the effectiveness of the pain management or sedation is further based at least in part on data indicating a blood pressure measurement or a respiration rate.

11. A system for monitoring pain management, comprising:

a sensor having at least one emitter and at least one detector configured to detect a PPG signal, the sensor coupled to a processor and control circuitry configured to;

receive a first effort measurement;

analyze one or more features within the PPG signal;

determine a second effort measurement based at least in part on the one or more analyzed features of the PPG signal;

compare the second effort measurement and at least the first effort measurement; and

if the second effort measurement differs from the first effort measurement by a selected value, generate a signal.

12. The system of claim 11 wherein the control circuitry is further configured to generate, a scalogram based at least in part on the PPG signal.

13. The system of claim 11 wherein the received first effort measurement comprises receiving an input indicating a effort range, or receiving reference effort information based at least in part on the PPG signal.

14. The system of claim 11 wherein the signal indicates at least one of the group of:

an alarm, a request to provide pain management, and a request to provide sedation.

15. The system of claim 11, further comprising, if the second effort measurement differs from the first effort measurement by a selected value, the control circuitry is further configured to automatically provide pain management or sedation by sending a signal to a pain management controller indicating a request for pain management or sedation.

16. The system of claim 15, wherein the control circuitry is further configured to determine a third effort measurement based at least in part on the PPG signal;

and determine an effectiveness of the pain management or sedation based at least in part on the second effort measurement and the third effort measurement.

17. The system of claim 16, wherein the determining, using the processor, the effectiveness of the pain management or sedation is further based at least in part on data indicating a blood pressure measurement or a respiration rate.

18. A system for monitoring pain management, comprising:

a sensor having at least one emitter and at least one detector configured to detect a PPG signal, the sensor coupled to a processor and control circuitry configured to;

analyze one or more features of the PPG signal;

determine a first effort measurement based at least in part on the one or more analyzed features of the PPG signal;

receive information indicating that pain management or sedation has been administered to a patient;

determine a second effort measurement based at least in part on the PPG signal at a time after the pain management or sedation has been administered to a patient; and

determine an effectiveness of the pain management or sedation based at least in part on a comparison of the first effort measurement and the second effort measurement

19. The system of claim 18 wherein the control circuitry is further configured, if the pain management or sedation is determined to not be effective, to generate a signal comprising at least one of the group of:

indicating an alarm, indicating a request to provide pain management, and indicating a request to provide sedation.

20. The system of claim 18, wherein the control circuitry is further configured to determine the effectiveness of the pain management or sedation based at least in part on data indicating a blood pressure measurement or a respiration rate.