User-retainable temperature and impedance monitoring methods and devices

• US 6,963,772 B2
• Filed: 04/17/2002
• Issued: 11/08/2005
• Est. Priority Date: 04/17/2002
• Status: Expired due to Fees

• Current Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Original Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Inventors: Salzberg, David, Heinrichs, Wm. Leroy, Kovacs, Gregory T. A., Bloom, Matthew
• Primary Examiner(s): WINAKUR, ERIC FRANK
• Application Number:
  US10/125,051
• Publication Number:
  US 20030199783A1
• Time in Patent Office: 1,301 Days
• Field of Search: 600/547, 600/548, 600/549, 600/300, 600/301
• US Class Current: 600/547
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/0535 Impedance plethysmography for measuring blood flow A61B5/0295
• CPC Class Codes: A61B 5/413 Monitoring transplanted tissue or organ, e.g. for possible rejection reactions after a transplant
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore

Abstract

A user-retainable monitoring system is disclosed. At least a pair of sensors is provided in association with a support member. The support member is preferably of a type that may be worn by or at least temporarily implanted in a patient. Possible sensor types include temperature sensors and impedance sensors. Temperature sensors may be used to detect a temperature differential between areas of tissue indicative of pathology. Impedance sensors are used to detect subcutaneous fluid detection. The support member may take the form of a bandage, drain or other structure. Monitor structures as described may have stand-alone utility or be connected to a processor or data recorder to enable various functions.

Claims

1. A method of monitoring a wound area of a subject, said method comprising:

contacting a subject with a device comprising;

a support member, and

one or more sensing portions supported by said support member, wherein said one or more sensing portions comprise at least one of;

an impedance sensor and two temperature sensors;

obtaining measurement data from said one or more sensing portions, wherein said data is indicative of healing or infection of said wound area; and

automatically initiating a secondary medical procedure in view of said obtained measurement data.

2. The method of claim 1, further comprising outputting a message indicative of said healing or said infection.

3. The method of claim 2, wherein said message is an audio message or visual message.

4. The method of claim 1, wherein said wound is a surgical wound.

5. The method of claim 1, wherein contacting comprises implanting at least a portion of said device within the body of said subject.

6. The method of claim 1, wherein at least a portion of said device is contacted with a skin surface of said subject.

7. The method of claim 1, wherein said data is indicative of healing.

8. The method of claim 1, wherein said data is indicative of infection.

9. The method of claim 1, wherein said device comprises an impedance sensor.

10. The method of claim 9, wherein said contacting comprises positioning a part of said impedance sensor adjacent a first side of a wound of said subject and positioning a part of said impedance sensor adjacent a second side of said wound.

11. The method of claim 1, further comprising electronic hardware that includes a memory unit and said method further comprises storing said obtained measurement data in said memory unit.

12. The method of claim 1, wherein said obtained measurement data comprises temperature measurement data.

13. The method of claim 12, wherein a decrease in temperature over time is indicative of wound healing.

14. The method of claim 12, wherein an increase in temperature over time is indicative of a wound infection.

15. A method of monitoring a wound area of a subject, said method comprising:

contacting a subject with a device comprising;

a support member, and

first and second temperature sensors supported by said support member,

wherein said contacting comprises positioning said first temperature sensor adjacent a non-wound area of said subject and positioning said second temperature sensor adjacent a wound area of said subject; and

obtaining measurement data from said first and second temperature sensors, wherein said data is indicative of healing or infection of said wound area.

16. The method of claim 15, further comprising outputting a message indicative of said healing or said infection.

17. The method of claim 16, wherein said message is an audio message or visual message.

18. The method of claim 15, wherein said wound is a surgical wound.

19. The method of claim 15, wherein contacting comprises implanting at least a portion of said device within the body of said subject.

20. The method of claim 15, wherein at least a portion of said device is contacted with a skin surface of said subject.

21. The method of claim 15, wherein said data is indicative of healing.

22. The method of claim 21, wherein a decrease in temperature over time is indicative of wound healing.

23. The method of claim 15, wherein said data is indicative of infection.

24. The method of claim 23, wherein an increase in temperature over time is indicative of a wound infection.

25. The method of claim 15, wherein said device comprises an impedance sensor.

26. The method of claim 25, wherein said contacting comprises positioning a part of said impedance sensor adjacent a first side of a wound of said subject and positioning a part of said impedance sensor adjacent a second side of said wound.

27. The method of claim 15, further comprising electronic hardware that includes a memory unit and said method further comprises storing said obtained measurement data in said memory unit.

28. The method of claim 15, wherein said determining comprises analyzing said obtained measurement data using a programmed processor.

29. A method of monitoring a wound area of a subject, said method comprising:

contacting a subject with a device comprising;

a support member, and

an impedance sensor and two temperature sensors supported by said support member, and

obtaining measurement data from said impedance sensor and two temperature sensor, wherein said data is indicative of healing or infection of said wound area.

30. The method of claim 29, further comprising outputting a message indicative of said healing or said infection.

31. The method of claim 30, wherein said message is an audio message or visual message.

32. The method of claim 29, wherein said wound is a surgical wound.

33. The method of claim 29, wherein contacting comprises implanting at least a portion of said device within the body of said subject.

34. The method of claim 29, wherein at least a portion of said device is contacted with a skin surface of said subject.

35. The method of claim 29, wherein said data is indicative of healing.

36. The method of claim 35, wherein a decrease in temperature over time is indicative of wound healing.

37. The method of claim 29, wherein said data is indicative of infection.

38. The method of claim 37, wherein an increase in temperature over time is indicative of a wound infection.

39. The method of claim 29, wherein said contacting comprises positioning a part of said impedance sensor adjacent a first side of a wound of said subject and positioning a part of said impedance sensor adjacent a second side of said wound.

40. The method of claim 29, further comprising electronic hardware that includes a memory unit and said method further comprises storing said obtained measurement data in said memory unit.

41. The method of claim 29, wherein said determining comprises analyzing said obtained measurement data using a programmed processor.