Foot temperature and health monitoring system

• US 20020082486A1
• Filed: 12/20/2001
• Published: 06/27/2002
• Est. Priority Date: 05/25/2000
• Status: Active Grant

• Current Assignee: Salix Medical Incorporated
• Original Assignee: Salix Medical Incorporated
• Inventors: Lavery, Lawrence A., Zamorano, Ruben G., Constantinides, George P., Athanasiou, Kyriacos A., Agrawal, C. Mauli, Lanctot, Dan R.
• Granted Patent: US 6,767,330 B2
• Time in Patent Office: Days
• US Class Current: 600/300
• 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 5/015 By temperature mapping of body part
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• 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 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: Y10S 128/92 Computer assisted medical diagnostics

Abstract

The present invention provides an apparatus and method for monitoring skin temperatures at predetermined locations on the body of a human or an animal. One embodiment includes a platform with a grid including holes on which the user stands. Under the grid is a movable array of light sensors and temperature sensors. The foot position is determined from the output of the light sensors. The temperatures at predetermined locations on the skin surface are determined by the signals obtained from the temperature sensors. Additional vital health information may be obtained by other sensors on the apparatus. The data may be stored for future retrieval, or transmitted to a remote location for off-site monitoring. Alternative embodiments include sensor blankets or wraps whereby temperature sensors monitor skin temperature for areas of pressure on the blanket or areas covered by the wrap.

Claims

1. An apparatus for monitoring the temperature of the plantar aspects of the foot of a human being, said device comprising:

a grid having a plurality of holes therein at predetermined locations;

a movable array of light sensors and skin temperature sensors;

said movable array of light sensors and skin temperature sensors constructed and arranged to travel under said grid and produce signals representative of the location of the feet and the skin temperatures on the plantar aspects of feet through said holes in said grid;

computer means for receiving said signals representative of the location of the feet and the skin temperatures on the plantar aspects of the feet;

said computer means constructed and arranged to both determine the position of the feet with respect to said holes in said grid using said signals representative of the location of the feet and the temperatures on the plantar aspects of the feet and selecting certain of such holes for recording sensed skin temperatures;

means for displaying said recorded skin temperatures.

2. The apparatus as defined in claim 1 further including means for generating a warning if a temperature exceeding a predetermined level as between two or more similar locations on the feet or adjacent sites on one foot is sensed.

3. The apparatus as defined in claim 1 wherein said output of recorded temperatures is a visual output.

4. The apparatus as defined in claim 3 wherein said visual output is a liquid crystal display.

5. The apparatus as defined in claim 1 wherein said output of sensed temperatures is an audio output.

6. The apparatus as defined in claim 1 further including means for sensing and displaying the weight of the human being.

7. The apparatus as defined in claim 1 further including means for sensing and displaying the blood pressure of the human being.

8. The apparatus as defined in claim 1 further including means for sensing and displaying the pulse rate of the human being.

9. The apparatus as defined in claim 1 further including means for sensing and displaying the blood glucose levels of the human being.

10. The apparatus as defined in claim 1 further including means for sensing and displaying the blood oxygen levels of the human being.

11. The apparatus as defined in claim 1 further including a modem for transmitting the recorded foot temperatures to a remote location.

12. The apparatus as defined in claim 7 further including means for transmitting the sensed blood pressure to a remote location.

13. The apparatus as defined in claim 8 further including means for transmitting the sensed pulse rate to a remote location.

14. The apparatus as defined in claim 9 further including means for transmitting the sensed blood glucose level to a remote location.

15. The apparatus as defined in claim 10 further including means for transmitting the sensed blood oxygen level to a remote location.

17. The system as defined in claim 16 wherein said means for sending said signals to a remote location is a telephone modem.

18. The system as defined in claim 16 wherein said means for sending said signals to a remote location is a wireless means.

19. The system as defined in claim 16 further including means for generating a warning if a temperature difference exceeding a predetermined level as between two or more of said probes is sensed.

20. The system as defined in claim 16 further including a visual display of sensed temperatures.

21. The system as defined in claim 19 further including means for generation of an audio warning.

22. The system as defined in claim 16 further including means for sensing and displaying the weight of a patient.

23. The system as defined in claim 16 further including means for sensing and displaying the blood pressure of a patient.

24. The system as defined in claim 16 further including means for sensing and displaying the pulse rate of a patient.

25. The system as defined in claim 16 further including means for sensing and displaying the blood glucose levels of a patient.

26. The system as defined in claim 16 further including means for sensing and displaying the blood oxygen levels of a patient.

30. The method of claim 29, wherein the step of locating the position of the feet on a grid plate further includes:

sensing the position of the feet on said grid plate using an array of light sensors;

whereby said light sensors are constructed and arranged to detect light shining through holes in said grid plate.

31. The method of claim 29, wherein the step of sensing the skin temperatures of the predetermined locations on the bottom of the feet further includes:

sensing the skin temperatures at predetermined locations on the bottom of a patient'"'"'s feet using an array of temperature sensors;

whereby said temperature sensors are constructed and arranged to measure skin temperature through said holes in said grid plate.

16. A system for monitoring the temperatures of the plantar aspects of the feet of a plurality of patients, said system comprising:

a grid having a plurality of holes formed therein, said holes being located at predetermined locations;

a movable array of light sensors;

said movable array of light sensors constructed and arranged to travel under said grid and produce signals indicating the location of the patient'"'"'s feet through said holes in said grid;

a movable array of skin temperature sensors;

said movable array of skin temperature sensors constructed and arranged to travel under said grid and produce signals representative of the skin temperatures on the plantar aspects of the patient'"'"'s feet through said holes in said grid;

a computer for receiving said signals representative of said location of the patient'"'"'s feet and said skin temperatures on the plantar aspects of the patient'"'"'s feet;

said computer constructed and arranged to both determine the position of patients'"'"' feet with respect to said holes in said grid using said signals representative of said location of the patient'"'"'s feet and said skin temperatures on the plantar aspects of the feet and selecting certain of said holes for recording sensed temperatures;

means for converting said signals generated by said heat sensitive probes into an output expressed in terms of temperature;

means for sending said signals to a remote location;

means for storing and analyzing said signals at said remote location;

whereby the temperatures of the feet of a plurality of human beings may be monitored at said remote location.

27. The system as defined in claims 16, 22, 23, 24, 25, and 26 further including means for storing the sensed information along with the date and time when the information was sensed.

28. A health monitoring system comprising:

a grid having a plurality of holes therein at predetermined locations, said grid including a portion for the bottom of a patient'"'"'s left foot and a portion for the bottom of a patient'"'"'s right foot;

a movable, substantially linear array of light sensors and infrared temperature sensors;

said movable, substantially linear array of light sensors and infrared temperature sensors, constructed and arranged to travel under said grid and produce signals representative of foot location and skin temperatures on the bottom of the patient'"'"'s feet covering said holes;

at least one guide per foot for enabling registration of the physical position of a patient'"'"'s foot with respect to said grid;

means for receiving and displaying the foot location signals using said movable, substantially linear array of light sensors

means for receiving and displaying the skin temperatures on the bottom of the patient'"'"'s feet using said movable, substantially linear array of infrared sensors.

29. A method for monitoring the temperature at predetermined locations on the feet of a human being, said method comprising the steps of:

locating the position of the feet on the top surface of a grid plate; and

sensing the skin temperatures of the predetermined locations on the bottom of the feet beneath the bottom surface of said grid plate.

32. A method for monitoring the temperature of a skin surface, said method comprising the steps of:

placing a blanket having a plurality of holes therein under a patient'"'"'s skin surface;

said blanket constructed and arranged wherein an array of pressure and temperature sensors are positioned beneath said plurality of grid holes;

determining the location of the patient'"'"'s skin surface with respect to said blanket by signals produced by said pressure sensors;

determining the temperature of the patient'"'"'s skin surface which touches said blanket by signals produced by said temperature sensors;

transmitting said signals representative of said temperature of the patient'"'"'s skin on a computer;

displaying, recording, and transmitting said recorded signals to a remote location.

33. A method for monitoring the temperature of an extremity of an animal, said method comprising the steps of:

placing a wrap having a plurality of holes therein around the extremity of an animal;

said wrap constructed and arranged wherein an array of temperature sensors are positioned beneath said plurality of holes;

determining the temperature of the skin surface of the animal'"'"'s extremity which touches said wrap by signals produced by said temperature sensors;

transmitting said signals representative of said temperature of the skin surface of the animal'"'"'s extremity to a computer;

displaying, recording, and transmitting said recorded signals to a remote location.

34. A method of monitoring the health of an employed human being comprising the steps of:

a) repeatedly sensing the temperatures on the bottoms of the human being'"'"'s feet;

b) repeatedly sensing at least one other health indicator selected from a group including;

body weight, blood pressure, pulse rate, blood glucose level, and blood oxygen level;

c) transmitting said temperatures on the bottoms of a human being'"'"'s feet and said at least one health indicator to the employer;

d) comparing said temperatures on the bottoms of a human being'"'"'s feet and said at least one health indicator to other like items of health information sensed on prior occasions;

e) alerting the employed human being of a potential health problem.

35. A method of monitoring the health of an insured or inclusion or covered plan human being comprising the steps of:

a) repeatedly sensing the temperatures on the bottom of the feet;

b) repeatedly sensing at least one other health indicator selected from a group including;

body weight, blood pressure, pulse rate, blood glucose level, and blood oxygen level;

c) transmitting said temperatures on the bottom of the human being'"'"'s feet and said at least one health indicator to the insurer;

d) comparing said temperatures on the bottom of a human being'"'"'s feet and said at least one health indicator to other like items of health information sensed on prior occasions;

e) re-evaluating the insurance risk of the insured human being based on the sensed health information.