Systems and methods for monitoring pain management

• US 8,858,433 B2
• Filed: 03/31/2010
• Issued: 10/14/2014
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Nellcor Puritan Bennett Ireland
• Original Assignee: Nellcor Puritan Bennett Ireland
• Inventors: Sethi, Rakesh, Addison, Paul Stanley, Watson, James N., Edney, Paul A.
• Primary Examiner(s): Johnson, III, Henry M
• Assistant Examiner(s): SORIANO, BOBBY GILES
• Application Number:
  US12/750,950
• Publication Number:
  US 20100249544A1
• Time in Patent Office: 1,658 Days
• Field of Search: 600300-301, 600323-324
• US Class Current: 600/301
• CPC Class Codes: A61B 2560/0223 of calibration, e.g. protocols for calibrating sensors
• CPC Class Codes: A61B 5/02125 of pulse wave propagation time
• 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

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 blood pressure measurement;

detecting a PPG signal with a sensor comprising at least one emitter and at least one detector, the sensor being coupled to the processor;

determining, using the processor, a second blood pressure measurement based at least in part on the detected PPG signal;

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

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

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

3. 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.

4. The method of claim 1 wherein the sensor comprises a single or multiple probe.

5. The method of claim 1, further comprising, if the second blood pressure measurement differs from the first blood pressure 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 blood pressure measurement based at least in part on the detected PPG signal; and

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

8. A method for monitoring pain management, comprising:

detecting a PPG signal with a sensor comprising at least one emitter and at least one detector;

determining, using a processor coupled to the sensor, a first blood pressure measurement based at least in part on the detected 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 blood pressure measurement based at least in part on a second 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 blood pressure measurement and the second blood pressure 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 respiration rate or a respiration effort.

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 blood pressure measurement;

determine a second blood pressure measurement based at least in part on the detected PPG signal;

compare the second blood pressure measurement and at least the first blood pressure measurement; and

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

12. The system of claim 11 wherein the receive a first blood pressure measurement comprises receiving an input indicating a blood pressure range, or receiving reference blood pressure information based on the PPG signal detected by the sensor.

13. 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.

14. The system of claim 11 wherein the sensor comprises a single or multiple probe.

15. The system of claim 11, further comprising, if the second blood pressure measurement differs from the first blood pressure 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 blood pressure measurement based at least in part on the detected PPG signal;

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

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;

determine a first blood pressure measurement based at least in part on the detected PPG signal;

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

determine a second blood pressure measurement based at least in part on a second 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 blood pressure measurement and the second blood pressure 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 respiration rate or a respiration effort.