Method and apparatus for indicating the emergence of an ulcer

• US 9,271,672 B2
• Filed: 03/13/2013
• Issued: 03/01/2016
• Est. Priority Date: 04/02/2012
• Status: Active Grant

• Current Assignee: Podimetrics, Inc.
• Original Assignee: Podimetrics, Inc.
• Inventors: Linders, David Robert, Bloom, Jonathan David, Engler, Jeffrey Mark, Petersen, Brian Jude, Geboff, Adam, Kale, David Charles
• Primary Examiner(s): TOWA, RENE T
• Application Number:
  US13/799,847
• Publication Number:
  US 20130261495A1
• Time in Patent Office: 1,084 Days
• Field of Search: 600/549, 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 a patient'"'"'s foot forms a thermogram of the sole of at least one foot of the patient, and determines whether the thermogram presents at least one of a plurality of prescribed patterns. The method also compares the thermogram against a prior thermogram of the same foot, and produces output information indicating the emergence of an ulcer on a given portion on the at least one foot as a function of 1) whether the thermogram is determined to present the at least one pattern, and 2) the comparison with the prior thermogram, which shows non-ulcerated tissue at the given location.

Claims

1. A method of determining an emergence of an ulcer on a given portion 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 last 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 of the patient from the discrete temperature data values, each thermogram comprising a spatially continuous data set of two-dimensional temperature values across the sole of one foot;

determining, by at least one of the one or more processors, whether the at least one thermogram presents at least one of a plurality of prescribed patterns;

said determining comprising comparing the at least one thermogram against a prior thermogram of the same foot; and

producing, by at least one of the one or more processors, output information indicating an emergence of an ulcer on a given portion 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 prescribed pattern, said producing also being a function of the comparison, the prior thermogram showing non-ulcerated tissue at the given portion.

2. The method as defined by claim 1 wherein the prior thermogram shows a pre-ulcer at the given portion.

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

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

5. The method as defined by claim 1 wherein the plurality of temperature sensors comprises a plurality of stationary sensors.

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

7. The method as defined by claim 1 wherein the plurality of temperature sensors are positioned at discrete locations of the open platform, said forming comprising interpolating temperature data between at least two of the plurality of temperature sensors to produce approximate temperature readings at locations that are between the sensors.

8. The method as defined by claim 1 wherein the 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.

9. 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.

10. 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.

11. The method as defined by claim 1 further comprising receiving a risk message from a network, the risk message having the output information.

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

13. The method as defined by claim 1 further comprising determining an orientation of the at least one foot to produce orientation information, said determining using the orientation information to determine whether the at least one thermogram presents at least one of the plurality of prescribed patterns.

14. The method as defined by claim 1 wherein the output information comprises information for displaying quantitative indicia indicating the emergence of the ulcer.

15. The method as defined by claim 1 further comprising forwarding a data message across a network, the data message having the spatially continuous data set of two-dimensional temperature values representing the at least one thermogram.

16. The method as defined by claim 1 wherein said forming comprises:

receiving a thermogram message through a network from the open platform, the thermogram message having the discrete temperature data values; and

forming the at least one thermogram from the discrete temperature data values in the thermogram message after receipt of the thermogram message.

17. The method as defined by claim 16 wherein said forming the at least one thermogram comprises interpolating the received discrete temperature data values.

18. A computer program product for determining the emergence of an ulcer on a given portion on the 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 plurality of discrete temperature data values from an open platform configured to receive at least one foot, the open platform having a plurality of temperature sensors,

the plurality of temperature sensors being configured to generate the plurality of discrete temperature data values after receipt of the at least one foot;

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

program code for determining whether the at least one thermogram presents at least one of a plurality of prescribed patterns;

said program code for determining comprising program code for comparing the at least one thermogram against a prior thermogram of the same foot; and

program code for producing output information indicating the emergence of an ulcer on a given portion on the at least one foot as a function of

     1) the comparison and

     2) whether the at least one thermogram is determined to present the at least one pattern, the prior thermogram showing non-ulcerated tissue at the given portion.

19. The computer program product as defined by claim 18 wherein the prior thermogram shows a pre-ulcer at the given portion.

20. The computer program product as defined by claim 18 wherein the program code for forming comprises computer program code for interpolating temperature data between at least two of a plurality of temperature data points across a two dimensional space to produce approximate temperature readings at locations that are between the at least two of the plurality of temperature data points across the two dimensional space.

21. The computer program product as defined by claim 18 wherein at least one of the plurality of prescribed patterns shows a deviation in one portion of the same foot over time.

22. The computer program product as defined by claim 18 further comprising program code for receiving a risk message from a network, the risk message having the output information.

23. The method as defined by claim 18 wherein the output information comprises information for displaying quantitative indicia indicating the emergence of the ulcer.

24. The computer program product as defined by claim 18 further comprising program code for forwarding a data message across a network, the message having the spatially continuous data set of two-dimensional temperature values representing the at least one thermogram.

25. The computer program product as defined by claim 18 wherein the program code for forming the at least one thermogram comprises:

program code for receiving a thermogram message through a network from the open platform, the thermogram message having the plurality of discrete temperature data values; and

program code for forming the at least one thermogram from the plurality of discrete temperature data values after receipt of the thermogram message.

26. The computer program product as defined by claim 25 wherein the program code for forming the at least one thermogram from the plurality of discrete temperature data values comprises program code for interpolating the received plurality of discrete temperature data values.

27. An apparatus for determining an emergence of an ulcer on a given portion 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 and configured to form at least one thermogram of a sole of each of the at least one foot of the patient from the plurality of discrete temperature data values, each thermogram comprising a spatially continuous data set of two-dimensional temperature values across the sole of one foot;

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

a comparator operatively coupled with the pattern recognition system, the comparator configured to compare the at least one thermogram against a prior thermogram of the same foot; and

an analyzer operatively coupled with the comparator, the analyzer being configured to produce output information indicating the emergence of an ulcer on a given portion on the at least one foot as a function of whether the thermogram is determined to present the at least one of the prescribed patterns, the output information also being a function of the comparison, the prior thermogram showing non-ulcerated tissue at the given portion.

28. The apparatus as defined by claim 27 wherein the open platform comprises a floor mat.

29. The apparatus as defined by claim 27 wherein the plurality of temperature sensors are positioned at discrete locations of the open platform, the thermogram generator being configured to form a thermogram by interpolating temperature data between at least two of the plurality of temperature sensors to produce approximate temperature readings at locations that are between the sensors.

30. The apparatus as defined by claim 27 wherein the plurality of temperature sensors comprises a plurality of stationary sensors and at least one contact sensor.

31. The apparatus as defined by claim 27 wherein the open platform includes a housing at least in part containing the thermogram generator, pattern recognition system, and analyzer.

32. The apparatus as defined by claim 27 wherein at least one of the plurality of prescribed patterns shows a deviation in one portion of the same foot over time.

33. The apparatus as defined by claim 27 wherein the prior thermogram shows a pre-ulcer at the given portion.