Method And System For Monitoring Pressure Areas On A Supported Body

• US 20120277637A1
• Filed: 11/17/2010
• Published: 11/01/2012
• Est. Priority Date: 11/24/2009
• Status: Abandoned Application

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Sarrafzadeh, Majid, Vahdatpour, Alireza
• Application Number:
  US13/511,606
• Publication Number:
  US 20120277637A1
• Time in Patent Office: Days
• US Class Current: 600/595
• CPC Class Codes: A47C 31/123 for beds or mattresses
• CPC Class Codes: A47C 31/126 for chairs
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/1116 Determining posture transitions
• 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 5/6892 Mats
• CPC Class Codes: A61G 2203/34 for pressure
• CPC Class Codes: A61G 7/057 Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor ventilation openings in mattresses A47C21/042; pneumatic or hydraulic mattresses A47C27/08

Abstract

A supported body, like the body of a bedridden patient, is monitored by a plurality of pressure sensors located between the body and support surface during an extended period of time. Pressure areas on the body are determined in real time for predetermined time periods during periods of movement between the body and the support surface. Common pressure areas on the body during different body positions on the support surface are determined for predetermined time periods. The pressure areas that exceed a predetermined pressure level for a predetermined time period trigger an alarm indicator and identification of the pressure areas of concern.

Claims

1. A method for monitoring a supported body for pressure areas, the steps of the method comprising:

continuously sensing pressure areas and pressure limits on the body in a first position on a support surface;

continuously sensing pressure areas and pressure levels on the body in a second position on the support surface;

determining common pressure areas sensed in the first position and the second position; and

determining whether the pressure level sensed for the common pressure areas exceeds a predetermined limit for a predetermined time.

2. The method of claim 1 further comprising generating an alert when the pressure sensed exceeds a predetermined level for a predetermined period of time.

3. The method of claim 1 wherein the first position and second position are the same.

4. The method of claim 1 wherein the determining step occurs after a change in body position in the support surface.

5. The method of claim 1 wherein continuously sensing pressure areas and pressure levels comprises generating a pressure map updated in real time.

6. The method of claim 1 wherein common pressure areas between the first position and second position are determined by a registration technique.

7. A method for monitoring a supported body for pressure areas, the steps of the method comprising:

continuously sensing pressure areas and pressure levels on the body for a first predetermined time period;

generating a first pressure map from the pressure areas in the first time period;

continuously sensing pressure areas and pressure levels on the body for a second predetermined time period;

generating a second pressure map from the pressure areas sensed in the second time period;

comparing the first and second pressure maps for similarity in size and shape; and

if first and second pressure maps are the same, indicating that the body has not moved, determining if any pressure area exceed a predetermined pressure limit for a predetermined time period.

8. The method of claim 7 further comprising:

if the first and second pressure maps are not the same, indicating that the body has moved, determining the common pressure areas in the first and second pressure maps; and

determining if any common pressure areas pressure limit for a predetermined time period.

9. An apparatus for monitoring a supported body for pressure areas, comprising:

a support platform for supporting at least a part of a human body;

a network of pressure sensors covering the support platform; and

a processor and computer readable storage connected to the network of pressure sensors for continuously receiving pressure signals from the pressure sensors, the processor generating a first pressure map based on the pressure signals received for a first predetermined time period and a second pressure map based on the pressure signals received for a second predetermined time period, the processor comparing the first and second pressure maps for similarity in size and shape.

10. The apparatus of claim 9 wherein the processor compares the first and second pressure maps and determines that the body has not moved with respect to the support platform if the first and second pressure maps are the same in size and shape.

11. The apparatus of claim 9 wherein the processor compares the first and second pressure maps and determines that the body has moved with respect to the support platform if the first and second pressure maps are not the same in size and shape.

12. The apparatus of claim 10 wherein the processor determines if any pressure area in the first and second pressure maps exceeded a predetermined pressure limit for a predetermined time period.

13. The apparatus of claim 11 wherein the processor determines common pressure areas in the first and second pressure maps and for the common pressure areas determines if any exceeded a predetermined pressure limit for a predetermined time period.

14. The apparatus of claim 9 wherein the support platform is a bed for supporting the entire body and the network of pressure sensors are individual sensors located in a sheet covering the bed.

15. the apparatus of claim 9 wherein the support platform is a bed for supporting the entire body and the method of pressure sensors is a sheet for covering the bed that has multiple conductive layers adapted to sense pressure.