Method and apparatus for indicating the risk of an emerging ulcer

• US 9,259,178 B2
• Filed: 03/13/2013
• Issued: 02/16/2016
• Est. Priority Date: 04/02/2012
• Status: Active Grant

• Current Assignee: Podimetrics, Inc.
• Original Assignee: Podimetrics, Inc.
• Inventors: Bloom, Jonathan David, Linders, David Robert, Engler, Jeffrey Mark, Petersen, Brian Jude, Geboff, Adam, Kale, David Charles
• Primary Examiner(s): TOWA, RENE T
• Application Number:
  US13/799,828
• Publication Number:
  US 20130261494A1
• Time in Patent Office: 1,070 Days
• Field of Search: 600/587, 600/592, 600/595
• US Class Current: 1/1
• CPC Class Codes: A61B 2562/0276 comprising a thermosensitive compound
• CPC Class Codes: A61B 2576/02 specially adapted for a particular organ or body part
• CPC Class Codes: A61B 5/0008 Temperature signals
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/015 By temperature mapping of body part
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: A61B 5/447 specially adapted for aiding the prevention of ulcer or pressure sore development, i.e. before the ulcer or sore has developed
• CPC Class Codes: A61B 5/6807 Footwear
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61B 5/706 Indicia not located on the patient, e.g. floor marking
• 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 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• CPC Class Codes: A61B 5/7425 Displaying combinations of multiple images regardless of image source, e.g. displaying a reference anatomical image with a live image geometric transforms for image registration G06T3/14; enhancement using image fusion G06T5/50; algorithms for registration of images G06T7/30
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 50/30 for calculating health indices; for individual health risk assessment

Abstract

A method of monitoring at least one foot of a patient provides an open platform for receiving at least one foot. The open platform has at least one temperature sensor for generating a plurality of temperature data values after receipt of the at least one foot. The method also forms a thermogram of the sole of the at least one foot from the temperature data values, and determines whether the thermogram presents at least one of a plurality of prescribed patterns. Finally, the method produces output information indicating the risk of an ulcer emerging on the foot as a function of whether the thermogram is determined to present the at least one prescribed pattern.

Claims

1. A method of determining a risk of an ulcer emerging on at least one foot of a patient, the method comprising:

providing one or more processors;

providing an open platform for receiving at least one foot, the open platform having a plurality of temperature sensors;

generating, using the plurality of temperature sensors, a plurality of discrete temperature data values after receipt of the at least one foot;

forming, by at least one of the one or more processors, at least one thermogram of a sole of each of the at least one foot from the discrete temperature data values, the at least one thermogram comprising a spatially continuous data set of two-dimensional temperature values across the sole of each of the at least one foot;

determining, by at least one of the one or more processors, at any location within the at least one thermogram of a sole of the at least one foot, whether the at least one thermogram presents at least one of a plurality of prescribed patterns; and

producing, by at least one of the one or more processors, output information indicating a risk of an ulcer emerging on the at least one foot, said producing being a function of whether the at least one thermogram is determined to present the at least one of the plurality of prescribed patterns.

2. The method as defined by claim 1 wherein the plurality of temperature sensors are positioned at discrete locations of the open platform, wherein forming at least one thermogram comprises interpolating temperature data between at least two of the plurality of temperature sensors to produce calculated temperature readings at locations that are between the sensors.

3. The method as defined by claim 1 wherein the open platform has a receiving area for receiving the at least one foot, the receiving area having a surface area that is greater than the surface area of the at least one foot.

4. The method as defined by claim 1 wherein at least one of the plurality of prescribed patterns shows a deviation in two portions of the same foot.

5. The method as defined by claim 1 wherein at least one of the plurality of prescribed patterns shows a deviation in corresponding portions of the patient'"'"'s two feet.

6. The method as defined by claim 1 wherein at least one of the plurality of prescribed patterns shows a deviation in one portion of the same foot over time.

7. The method as defined by claim 1 wherein providing an open platform comprises positioning both feet on the open platform.

8. The method as defined by claim 1 wherein the open platform comprises a floor mat.

9. The method as defined by claim 1 wherein the at least one thermogram is not visually displayed to produce the output information.

10. The method as defined by claim 1 further comprising forwarding a data message across a network, the message having the temperature values representing the at least one thermogram.

11. The method as defined by claim 10 further comprising receiving a risk message from the network, the risk message having the output information.

12. The method as defined by claim 1 wherein the open platform has a platform surface for receiving and contacting the at least one foot, the plurality of stationary sensors being stationary relative to the platform surface.

13. The method as defined by claim 1 where the plurality of temperature sensors comprises at least one contact sensor, the at least one contact sensor being in thermally-conductive contact with the sole of each of the at least one foot to generate the plurality of discrete temperature data values.

14. The method as defined by claim 1 wherein said forming comprises forming at least one thermogram of substantially the entirety of the sole of each of the at least one foot.

15. The method as defined by claim 1 further comprising determining, from the at least one thermogram, the orientation of the at least one foot to produce orientation information, using the orientation information to orient the at least one thermogram to a standard coordinate system to produce at least one standardized thermogram, and using the at least one standardized thermogram to determine whether the at least one thermogram presents at least one of a the plurality of prescribed patterns.

16. The method as defined by claim 1 wherein the output information comprises information for displaying quantitative non-temperature indicia indicating the risk of an emerging ulcer.

17. The method as defined by claim 1 wherein the open platform includes a two-dimensional array of the plurality of temperature sensors having a spatial resolution, the spatial resolution of the at least one thermogram being greater than the spatial resolution of the two-dimensional array of temperature sensors.

18. The method as defined by claim 1 wherein the output information includes at least one risk value indicating the risk of an ulcer emerging on the at least one foot, the risk value being within a predefined non-temperature scale ranking the risk of an ulcer emerging on the at least one foot.

19. The method as defined by claim 1 wherein the plurality of discrete temperature data values represent the temperature at a corresponding plurality of prescribed locations of the sole of the at least one foot,

the plurality of prescribed locations including a plurality of adjacent prescribed locations that are spaced apart, the method further comprising calculating temperatures between adjacent prescribed locations of the sole of the at least one foot,

the at least one thermogram comprising the plurality of discrete temperature data values and the calculated temperatures between adjacent prescribed locations of the sole of the at least one foot.

20. A method of determining a risk of an ulcer emerging on at least one foot of a patient, the method comprising:

providing one or more processors;

receiving a thermogram message through a network from an open platform for receiving at least one foot, the open platform having a plurality of temperature sensors;

the plurality of temperature sensors having generated a plurality of discrete temperature data values after receipt of the at least one foot, the thermogram message including the discrete temperature data values;

forming by at least one of the one or more processors, at least one thermogram of a sole of each of the at least one foot from the received temperature data values, the at least one thermogram comprising a spatially continuous data set of two-dimensional temperature values across the sole of each of the at least one foot;

determining, by at least one of the one or more processors, at any location within the at least one thermogram of the sole of the at least one foot, whether the at least one thermogram presents at least one of a plurality of prescribed patterns, the at least one of the prescribed patterns being determined at least in part by a comparison of the temperature(s) at one or more of;

     1) the same portion of the same foot at different times,

     2) corresponding portions of the patient'"'"'s two feet, and

     3) different portions of the same foot; and

producing, by at least one of the one or more processors, output information indicating a risk of an ulcer emerging on the at least one foot, said producing being a function of whether the at least one thermogram is determined to present the at least one of the plurality of prescribed patterns.

21. The method as defined by claim 20 wherein the plurality of temperature sensors are positioned at discrete locations of the open platform, said forming at least one thermogram comprising interpolating temperature data between at least two of the plurality of temperature sensors to produce calculated temperature readings at locations that are between the sensors.

22. The method as defined by claim 20 wherein the open platform has a receiving area for receiving the at least one foot, the receiving area having a surface area that is greater than the surface area of the at least one foot.

23. The method as defined by claim 20 further comprising forwarding a diagnosis message having data indicating the risk of an ulcer emerging on the at least one foot.

24. The method as defined by claim 20 wherein at least one of the plurality of prescribed patterns shows a deviation in corresponding portions of the patient'"'"'s two feet.

25. The method as defined by claim 20 wherein at least one of the plurality of prescribed patterns shows a deviation in one portion of the same foot over time.

26. The method as defined by claim 20 wherein the open platform comprises a floor mat.

27. The method as defined by claim 20 wherein said forming-comprises generating data that produces at least one thermogram if displayed on a display device.

28. The method as defined by claim 20 wherein forming comprises forming at least one thermogram of substantially the entirety of the sole of the at least one foot.

29. The method as defined by claim 20 wherein the output information comprises information for displaying quantitative indicia indicating the risk of an emerging ulcer.

30. An apparatus for determining a risk of an ulcer emerging on at least one foot of a patient, the apparatus comprising:

an open platform having a plurality of temperature sensors configured to generate a plurality of discrete temperature data values after receipt of the at least one foot;

a thermogram generator operatively coupled with the open platform, the thermogram generator having a processor configured to form at least one thermogram of a sole of each of the at least one foot from the received temperature data values, the at least one thermogram comprising a spatially continuous data set of two-dimensional temperature values across the sole of the at least one foot;

a pattern recognition system operatively coupled with the thermogram generator, the pattern recognition system configured to determine, at any location within the at least one thermogram of the sole of the least one foot, whether the at least one thermogram presents at least one of a plurality of prescribed patterns; and

an analyzer operatively coupled with the pattern recognition system, the analyzer being configured to produce output information indicating the risk of an ulcer emerging on the at least one foot as a function of whether the at least one thermogram is determined to present the at least one of the plurality of prescribed patterns.

31. The apparatus as defined by claim 30 wherein the open platform has a receiving area for receiving the at least one foot, the receiving area having a surface area that is greater than the surface area of the at least one foot.

32. The apparatus as defined by claim 30 wherein the open platform comprises a floor mat.

33. The apparatus as defined by claim 30 wherein the open platform includes a housing at least in part containing the thermogram generator, pattern recognition system, and analyzer.

34. The apparatus as defined by claim 30 wherein at least one of the plurality of prescribed patterns shows a deviation in corresponding portions of the patient'"'"'s two feet.

35. The apparatus as defined by claim 30 wherein at least one of the plurality of prescribed patterns shows a deviation in one portion of the same foot over time.

36. The apparatus as defined by claim 30 wherein the thermogram generator is configured to generate data that produces a thermogram if displayed on a display device, the apparatus further comprising a display device for displaying the thermogram.

37. The apparatus as defined by claim 30 wherein the thermogram generator is configured to generate a thermogram of substantially the entirety of the sole of the at least one foot.

38. The apparatus as defined by claim 30 wherein the output information comprises information for displaying quantitative indicia indicating the risk of an emerging ulcer.

39. A computer program product for use on a computer system for determining a risk of an ulcer emerging on at least one foot of a patient, the computer program product comprising a tangible, non-transient computer usable medium having computer readable program code thereon, the computer readable program code comprising:

program code for receiving a thermogram message through a network from an open platform for receiving at least one foot, the open platform having a plurality of temperature sensors;

the plurality of temperature sensors being configured to generate a plurality of discrete temperature data values after receipt of the at least one foot, the thermogram message including at least some of the plurality of discrete temperature data values;

program code for forming at least one a thermogram of a sole a of each of the at least one foot from the received temperature data values, the at least one thermogram comprising a spatially continuous data set of two-dimensional temperature values across the sole of each of the at least one foot;

program code for determining, at any location within the at least one thermogram of the sole of each of the at least one foot, whether the at least one thermogram presents at least one of a plurality of prescribed patterns, the at least one of the prescribed patterns being determined at least in part by a comparison of the temperature(s) at

     1) the same portion of the same foot at different times,

     2) corresponding portions of the patient'"'"'s two feet, and

     3) different portions of the same foot; and

program code for producing output information indicating the risk of an ulcer emerging on the at least one foot, said producing being a function of whether the at least one thermogram is determined to present the at least one of the plurality of prescribed patterns.

40. The computer program product as defined by claim 39 wherein the plurality of temperature sensors are positioned at discrete locations of the open platform, the program code for forming comprising program code for interpolating temperature data between at least two of the plurality of temperature sensors to produce calculated temperature readings at locations that are between the at least two sensors.

41. The computer program product as defined by claim 39 further comprising program code for forwarding a diagnosis message having data indicating the risk of an ulcer emerging on the at least one foot.

42. The computer program product as defined by claim 39 wherein at least one of the plurality of prescribed patterns shows a deviation in corresponding portions of the patient'"'"'s two feet.

43. The computer program product as defined by claim 39 wherein at least one of the plurality of prescribed patterns shows a deviation in one portion of the same foot over time.

44. The computer program product as defined by claim 39 wherein the program code for forming comprises program code for forming a thermogram of substantially the entirety of the sole the at least one foot.