System and method for automatic detection of a plurality of SPO2 time series pattern types

• US 9,042,952 B2
• Filed: 02/10/2006
• Issued: 05/26/2015
• Est. Priority Date: 01/27/1997
• Status: Expired due to Term

• Current Assignee: Lawrence A. Lynn
• Original Assignee: Lawrence A. Lynn
• Inventors: Lynn, Lawrence A., Lynn, Eric N.
• Primary Examiner(s): BERHANU, ETSUB D
• Application Number:
  US11/351,961
• Publication Number:
  US 20060149144A1
• Time in Patent Office: 3,392 Days
• Field of Search: 600/323, 600/324, 600/484, 600/529
• US Class Current: 600/324
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• 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 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/412 Detecting or monitoring sepsis
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/726 using Wavelet transforms
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 7/003 Detecting lung or respiration noise
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 50/20 for computer-aided diagnosis, e.g. based on medical expert systems
• CPC Class Codes: G16H 50/30 for calculating health indices; for individual health risk assessment

Abstract

The disclosed embodiments relate to pulse oximetry. An exemplary pulse oximeter comprises a probe that is adapted to be attached to a body part of a patient to create a signal indicative of an oxygen saturation of blood of the patient, and a processor that is adapted to receive the signal produced by the probe, to calculate an SPO2 value based on the signal, to detect a plurality of pattern types of SPO2 indicative of pathophysiologic events, and to produce an output indicative of a detected one of the plurality of pattern types.

Claims

1. A pulse oximeter, comprising:

a probe that is adapted to be attached to a body part of a patient to create a signal indicative of an oxygen saturation of blood of the patient; and

a processor that is adapted to receive the signal produced by the probe, to calculate an SPO2 value based on the signal, to detect a plurality of pattern types of SPO2 indicative of pathophysiologic events, to detect at least one SPO2 shape feature or value of a rise event of one of the pattern types of SPO2, and to recognize a condition of an arousal response failure based on the SPO2 shape feature or the value and produce a warning responsive to said recognizing.

2. The pulse oximeter recited in claim 1, comprising a display that is adapted to provide a visual indication corresponding to the warning.

3. The pulse oximeter recited in claim 2, wherein the visual indication comprises a text message.

4. The pulse oximeter recited in claim 1, wherein at least one of the plurality of pattern types is indicative of a recovery failure.

5. The pulse oximeter recited in claim 1, wherein at least one of the plurality of pattern types is indicative of a threshold failure.

6. The pulse oximeter recited in claim 1, the SPO2 shape feature comprising an SPO2 peak value.

7. The pulse oximeter recited in claim 1, the SPO2 shape feature comprising an SPO2 magnitude.

8. The pulse oximeter recited in claim 1, the SPO2 shape feature comprising a magnitude of the rise event in relationship to a magnitude of a corresponding fall event.

9. The pulse oximeter of claim 1, wherein the processor provides an output to initiate a therapeutic activity responsive to said recognizing.

10. The pulse oximeter of claim 9, wherein the therapeutic activity comprises a reduction of administration of a medication to the patient.

11. The pulse oximeter of claim 9, wherein the therapeutic activity comprises administration of a medication to the patient.

12. The pulse oximeter of claim 9, wherein the therapeutic activity comprises stimulating the patient.

13. The pulse oximeter of claim 1, wherein the processor provides an output to modify administration of a medication responsive to said recognizing.

14. A pulse oximeter, comprising:

a probe that is adapted to be attached to a body part of a patient to create a signal indicative of an oxygen saturation of blood of the patient; and

a processor that is adapted to receive the signal produced by the probe, to calculate an SPO2 value based on the signal, to detect a plurality of cluster pattern types of SPO2, to detect at least one SPO2 shape feature or value of a rise event of one of the pattern types of SPO2, and to recognize a condition of an arousal response failure based on the SPO2 shape feature or the value and produce a warning responsive to said recognizing.

15. The pulse oximeter recited in claim 14, comprising a display that is adapted to provide a visual indication corresponding to the warning.

16. The pulse oximeter recited in claim 15, wherein the visual indication comprises a text message.

17. The pulse oximeter recited in claim 14, wherein the at least one cluster pattern type is indicative of a recovery failure.

18. The pulse oximeter recited in claim 14, wherein the at least one of the plurality of pattern types is indicative of a threshold failure.

19. The pulse oximeter recited in claim 14 wherein the processor is adapted to calculate a plurality of sequential severity indices of the at least one cluster pattern type.

20. The pulse oximeter recited in claim 14, wherein the processor is adapted to calculate a time series of severity indices of the at least one cluster pattern type.

21. The pulse oximeter recited in claim 14, the SPO2 shape feature comprising an SPO2 peak value.

22. The pulse oximeter recited in claim 14, the SPO2 shape feature comprising an SPO2 magnitude.

23. The pulse oximeter recited in claim 14, the SPO2 shape feature comprising a magnitude of the rise event in relationship to a magnitude of a corresponding fall event.

24. A pulse oximeter, comprising:

a probe that is adapted to be attached to a body part of a patient to create a signal indicative of an oxygen saturation of blood of the patient; and

a processor that is adapted to receive the signal produced by the probe, to calculate an SPO2 value based on the signal, to detect a plurality of different cluster pattern types of SPO2, to detect at least one SPO2 shape feature or value of a rise event of one of the pattern types of SPO2, and to recognize a condition of an arousal response failure based on the SPO2 shape feature or the value and produce a warning responsive to said recognizing.

25. The pulse oximeter recited in claim 24, comprising a display that is adapted to provide a visual indication corresponding to the warning.

26. The pulse oximeter recited in claim 25, wherein the visual indication comprises a text message.

27. The pulse oximeter recited in claim 24, wherein at least one of the plurality of cluster pattern types is indicative of a recovery failure.

28. The pulse oximeter recited in claim 24, wherein at least one of the plurality of cluster pattern types is indicative of a threshold failure.

29. The pulse oximeter recited in claim 24 wherein the processor is adapted to calculate a plurality of sequential severity indices of at least one of the plurality of cluster pattern types.

30. The pulse oximeter recited in claim 24, wherein the processor is adapted to calculate a time series of severity indices of at least one of the plurality of cluster pattern types.

31. The pulse oximeter recited in claim 24, wherein the processor is adapted to determine an indication of severity of the detected cluster pattern type.

32. The pulse oximeter recited in claim 24, wherein the processor is adapted to display an indication of severity of the detected cluster pattern type.

33. The pulse oximeter recited in claim 24, wherein the processor is adapted to calculate a plurality of sequential severity indices of the detected cluster pattern type.

34. The pulse oximeter recited in claim 24, wherein the processor is adapted to calculate a time series of severity indices of the detected cluster pattern type.

35. The pulse oximeter recited in claim 24, the SPO2 shape feature comprising an SPO2 peak value.

36. The pulse oximeter recited in claim 24, the SPO2 shape feature comprising an SPO2 magnitude.

37. The pulse oximeter recited in claim 24, the SPO2 shape feature comprising a magnitude of the rise event in relationship to a magnitude of a corresponding fall event.

38. A method of monitoring a patient, comprising:

receiving a signal indicative of an oxygen saturation of blood of the patient;

calculating an SPO2 value based on the signal on a processor of a monitor;

detecting a plurality of pattern types of SPO2 indicative of pathophysiologic events suggestive of arousal response failure;

detecting at least one SPO2 shape feature or value of a rise event of one of the pattern types of SPO2;

recognizing, via a processor, a condition of the arousal response failure based on the SPO2 shape feature or the value; and

producing a warning responsive to said recognizing.

39. The method of claim 38, wherein the SPO2 shape feature comprises an SPO2 peak value.

40. The method of claim 38, wherein the SPO2 shape feature comprises an SPO2 magnitude.

41. The method of claim 38, wherein the SPO2 shape feature comprises a magnitude of the rise event in relationship to a magnitude of a corresponding fall event.

42. The method of claim 38, wherein the processor provides an output to initiate a therapeutic activity responsive to said recognizing.

43. The method of claim 42, wherein the therapeutic activity comprises a reduction of administration of a medication to the patient.

44. The method of claim 42, wherein the therapeutic activity comprises administration of a medication to the patient.

45. The method of claim 42, wherein the therapeutic activity comprises stimulating the patient.

46. A method of monitoring a patient, comprising:

receiving a signal indicative of an oxygen saturation of blood of the patient;

calculating an SPO2 value based on the signal on a processor of a monitor;

detecting a plurality of cluster pattern types of SPO2 suggestive of arousal response failure;

detecting at least one SPO2 shape feature or value of a rise event of one of the pattern types of SPO2;

recognizing, via a processor, a condition of the arousal response failure based on the SPO2 shape feature or the value; and

producing a warning responsive to said recognizing.

47. The method of claim 46, wherein the SPO2 shape feature comprises an SPO2 peak value.

48. The method of claim 46, wherein the SPO2 shape feature comprises an SPO2 magnitude.

49. The method of claim 46, wherein the SPO2 shape feature comprises a magnitude of the rise event in relationship to a magnitude of a corresponding fall event.

50. A method of monitoring a patient, comprising:

receiving a signal indicative of an oxygen saturation of blood of the patient;

calculating an SPO2 value based on the signal on a processor of a monitor;

detecting a plurality of different cluster pattern types of SPO2 suggestive of arousal response failure;

detecting at least one SPO2 shape feature or value of a rise event of one of the pattern types of SPO2;

recognizing, via a processor, a condition of the arousal response failure based on the SPO2 shape feature or the value; and

producing a warning responsive to said recognizing.

51. The method of claim 50, wherein the SPO2 shape feature comprises an SPO2 peak value.

52. The method of claim 50, wherein the SPO2 shape feature comprises an SPO2 magnitude.

53. The method of claim 50, wherein the SPO2 shape feature comprises a magnitude of the rise event in relationship to a magnitude of a corresponding fall event.