System and method for detecting pressure of selected body parts

• US 5,119,831 A
• Filed: 01/11/1991
• Issued: 06/09/1992
• Est. Priority Date: 01/11/1991
• Status: Expired due to Term

• Current Assignee: University of Iowa Research Foundation
• Original Assignee: University of Iowa Research Foundation
• Inventors: Robin, Donald A., Luschei, Erich S.
• Primary Examiner(s): HINDENBURG, MAX F
• Application Number:
  US07/640,281
• Time in Patent Office: 515 Days
• Field of Search: 128/26, 128/774-782, 606/192, 606/197, 73/862.53, 73/865.4, 73/379
• US Class Current: 600/587
• CPC Class Codes: A61B 5/03 Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs A61B5/205 takes precedence
• CPC Class Codes: A61B 5/225 of the fingers, e.g. by monitoring hand-grip force
• CPC Class Codes: A61B 5/228 of masticatory organs, e.g. detecting dental force
• CPC Class Codes: G01L 9/04 of resistance-strain gauges

Abstract

A portable pressure detecting device is provided employing a fluid-filled bulb of a suitable size to fit within the mouth of a person to sense pressure generated within the mouth. In addition, a fluid-filled bulb of a suitable size to fit within the hand of the person serves to sense pressure generated by the hand. A transducer is alternatively connectable with each bulb for converting the pressure sensed by the connected bulb to an electrical signal representing the sensed pressure. A pressure comparator circuit is responsive to the electrical signal for comparing the sensed pressure to a selected predetermined pressure level for producing an output indicating the proportion of the sensed pressure relative to the predetermined pressure level. A peak pressure detection circuit is responsive to the electrical signal for detecting the peak pressure sensed by the bulb. An LCD display selectively displays the sensed moment-to-moment pressure, the peak pressure, or the selected predetermined pressure level. An LED display selectively displays the proportion of the sensed pressure relative to the predetermined pressure level.

Claims

1. A pressure detecting system comprising:

(a) a pressure sensor of a suitable size to fit within a selected body part of a person for sensing pressure generated by the selected body part of the person;

(b) a transducer connectable with the pressure sensor for converting the pressure sensed by the pressure sensor to an electrical signal representing the sensed pressure; and

(c) a pressure comparator circuit responsive to the electrical signal for comparing the sensed pressure to a predetermined pressure level for producing an output indicating the proportion of the sensed pressure relative to the predetermined pressure level; and

(d) an output display responsive to the output from the pressure comparator circuit for indicating the proportion of the sensed pressure relative to the predetermined pressure level so that changes in the proportion resulting from changes in the sensed pressure can be monitored.

2. The system in accordance with claim 1 including a pressure level adjustment for the pressure comparator circuit to enable selective adjustment of the predetermined pressure level.

3. The system in accordance with claim 2 wherein said output display includes a first display for displaying the predetermined pressure level selected at the pressure level adjustment and a second display for displaying the proportion of the sensed pressure relative to the predetermined pressure level.

4. The system in accordance with claim 3 wherein the first display includes a numeric display and wherein the second display includes a bar graph display.

5. The system in accordance with claim 1 including a peak-pressure detection circuit responsive to the electrical signal for detecting the peak pressure sensed by the sensor.

6. The system in accordance with claim 5 including a pressure level adjustment for the pressure comparator circuit to enable selective adjustment of the predetermined pressure level to the peak pressure detected.

7. The system in accordance with claim 5 wherein said output display includes a display for displaying the peak pressure detected by the peak-pressure detection circuit in a calibrated amount of standard pressure units.

8. The system in accordance with claim 5 including a selection switch for the output display for selectively enabling the sensed pressure, the peak pressure, and the proportion of the sensed pressure relative to the predetermined pressure level to be displayed on the output display.

9. The system in accordance with claim 8 wherein said output display includes a first display for displaying the predetermined pressure level and a second display for displaying the proportion of the sensed pressure relative to the predetermined pressure level and wherein the selection switch selectively enables the predetermined pressure level to be displayed on the first display while the proportion of the sensed pressure relative to the predetermined pressure level is simultaneously displayed on the second display.

10. The system in accordance with claim 5 including a polarity selector for the peak-pressure detection circuit to selectively enable the detection of positive and negative peak pressures.

11. The system in accordance with claim 1 wherein the pressure sensor includes a fluid-filled bulb of a suitable size to fit within the mouth of the person to sense pressure generated within the mouth, the bulb having suitable resilience to deform under the pressure generated by the mouth and to return to original shape when the pressure generated by the mouth is removed.

12. The system in accordance with claim 11 wherein the fluid-filled bulb is filled with a liquid.

13. The system in accordance with claim 11 wherein the pressure sensor includes a second fluid-filled bulb of a suitable size to fit within the hand of the person to sense pressure generated within the hand, the bulb having suitable resilience to deform under the pressure generated by the hand and to return to original shape when the pressure generated by the hand is removed.

14. The system in accordance with claim 1 wherein the pressure sensor includes a fluid-filled bulb of a suitable size to fit within the hand of the person to sense pressure generated within the hand, the bulb having suitable resilience to deform under the pressure generated by the hand and to return to original shape when the pressure generated by the hand is removed.

15. The system in accordance with claim 14 wherein the fluid-filled bulb is filled with a liquid.

16. A portable pressure detecting device comprising:

(a) a fluid-filled bulb of a suitable size to fit within the mouth of a person to sense pressure generated within the mouth, the bulb having suitable resilience to deform under the pressure generated by the mouth and to return to original shape when the pressure generated by the mouth is removed;

(b) a transducer connectable with the bulb for converting the pressure sensed by the bulb to an electrical signal representing the sensed pressure;

(c) a pressure comparator circuit responsive to the electrical signal for comparing the sensed pressure to a predetermined pressure level for producing an output indicating the proportion of the sensed pressure relative to the predetermined pressure level;

(d) a peak-pressure detection circuit responsive to the electrical signal for detecting a peak pressure level sensed by the bulb; and

(e) an output display responsive to the electrical signal from the transducer, the output from the pressure comparator circuit and the peak pressure level detected by the peak-pressure detection circuit for selectively displaying the sensed pressure, the peak pressure, and the proportion of the sensed pressure relative to the predetermined pressure level so that changes in the proportion resulting from changes in the sensed pressure can be monitored.

17. The device in accordance with claim 16 including a pressure level adjustment for the pressure comparator circuit to enable selective adjustment of the predetermined pressure level.

18. The device in accordance with claim 17 wherein the output display includes a first display for displaying the selected predetermined pressure level and a second display for displaying the proportion of the sensed pressure relative to the predetermined pressure level.

19. The device in accordance with claim 16 including a polarity selector for the peak-pressure detection circuit to selectively enable the detection of positive and negative peak pressures.

20. The device in accordance with claim 16 wherein the fluid-filled bulb is filled with a liquid.

21. The device in accordance with claim 16 including a second fluid-filled bulb of a suitable size to fit within the hand of the person to sense pressure generated within the hand, the second bulb having suitable resilience to deform under the pressure generated by the hand and to return to original shape when the pressure generated by the hand is removed.

22. The device in accordance with claim 21 wherein the second fluid-filled bulb is filled with a liquid.

23. The device in accordance with claim 16 wherein the electrical signal representing the sensed pressure is an analog signal and wherein the system includes an analog-to-digital converter for converting the analog signal to a digital signal and wherein said output display includes a digital display for displaying the digital signal as calibrated amount of the sensed pressure.

24. The device in accordance with claim 16 wherein the peak-pressure detection circuit produces an analog signal representing the peak pressure detected and wherein the system includes an analog-to-digital converter for converting the analog signal to a digital signal and wherein said output display includes a digital display for displaying the digital signal as a calibrated amount of peak pressure detected.

25. The system in accordance with claim 16 including a pressure level adjustment for the pressure comparator circuit to enable selective adjustment of the predetermined pressure level to the peak pressure level.

26. A method for analyzing pressure generated within at least one selected body part of a person comprising:

(a) providing a pressure sensor of a suitable size to fit within a mouth of the person;

(b) inserting the pressure sensor within the mouth;

(c) sensing the pressure generated within the mouth on the pressure sensor;

(d) comparing the sensed pressure to a predetermined pressure level;

(e) producing an output representing the fractional proportion of the sensed pressure relative to the predetermined pressure level;

(f) comparing the output representing the fractional proportion to a selected reference level; and

(g) timing the period in which the output representing the fractional proportion exceeds the selected reference level.

27. The method in accordance with claim 26 including displaying an indication of the fractional proportion of the sensed pressure relative to the predetermined pressure level.

28. The method in accordance with claim 26 including selectively adjusting the predetermined pressure level.

29. The method in accordance with claim 26 including detecting a peak pressure level sensed by the pressure sensor.

30. The method in accordance with claim 29 including selectively adjusting the predetermined pressure level to the peak pressure level.

31. The method in accordance with claim 30 including displaying an indication of the fractional proportion of the sensed pressure relative to the predetermined pressure level.

32. The method in accordance with claim 26 wherein the pressure sensor includes a fluid-filled bulb having a suitable size to fit within the mouth of the person, the bulb having suitable resilience to deform under pressure generated within the mouth and to return to original shape when the pressure generated by the mouth is removed.

33. The method in accordance with claim 32 wherein the fluid-filled bulb is filled with a liquid.

34. The method in accordance with claim 26 including:

(a) providing a second pressure sensor of a suitable size to fit within a hand of the person;

(b) inserting the second pressure sensor within the hand of the person;

(c) sensing the pressure generated within the hand on the pressure sensor;

(d) comparing the sensed pressure from the hand to a predetermined pressure level for the hand;

(e) producing an output representing the fractional proportion of the sensed pressure from the hand relative to the predetermined pressure level for the hand;

(f) comparing the output representing the fractional proportion for the hand to a selected reference level for the hand; and

(g) timing the period in which the output representing the fractional proportion for the hand exceeds the selected reference level for the hand.

35. The method in accordance with claim 34 including selectively adjusting the predetermined pressure level for the hand.

36. The method in accordance with claim 34 including detecting a peak pressure level sensed by the pressure sensor for the hand.

37. The method in accordance with claim 36 including selectively adjusting the predetermined pressure level for the hand to the peak pressure level for the hand.

38. The method in accordance with claim 37 including displaying an indication of the fractional proportion of the sensed pressure from the hand relative to the predetermined pressure level for the hand.

39. The method in accordance with claim 34 wherein the pressure sensor for the hand includes a fluid-filled bulb having a suitable size to fit within the hand of the person, the bulb for the hand having suitable resilience to deform under pressure generated within the hand and to return to original shape when the pressure generated by the hand is removed.

40. The method in accordance with claim 39 wherein the fluid-filled bulb for the hand is filled with a liquid.

41. The method in accordance with claim 34 including displaying an indication of the fractional proportion of the sensed pressure from the hand relative to the predetermined pressure level for the hand.