Force optimization surface apparatus and method

• US 7,330,127 B2
• Filed: 04/20/2004
• Issued: 02/12/2008
• Est. Priority Date: 10/28/1998
• Status: Expired due to Term

• Current Assignee: Hill-Rom Services Incorporated (Baxter International Inc.)
• Original Assignee: Hill-Rom Services Incorporated (Baxter International Inc.)
• Inventors: Stolpmann, James R., Repik, Marla, Bries, Nick, Price, James H., Thomas, James Milton Cherry, Caldwell, Karl, Taylor, Geoffrey Locke, Mensching, Kerry J.
• Primary Examiner(s): Tweel, Jr.; John
• Application Number:
  US10/827,810
• Publication Number:
  US 20040194220A1
• Time in Patent Office: 1,393 Days
• Field of Search: 340/666, 340/665, 340/667, 340/575, 200/85.R, 200/85.A, 731/72, 177/144
• US Class Current: 340/666
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• 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 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/1126 using a particular sensing technique
• CPC Class Codes: A61B 5/113 occurring during breathing
• 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 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61G 2203/32 for force
• CPC Class Codes: A61G 2203/34 for pressure
• CPC Class Codes: A61G 2203/44 for weight
• CPC Class Codes: A61G 2203/46 for temperature
• CPC Class Codes: A61G 2203/74 for anti-shear when adjusting furniture
• CPC Class Codes: A61G 7/0527 Weighing devices
• CPC Class Codes: A61G 7/05715 with modular blocks, or inserts, with layers of different material
• CPC Class Codes: A61G 7/05769 with inflatable chambers
• CPC Class Codes: G01G 19/445 in a horizontal position
• CPC Class Codes: G01G 23/3728 : with wireless means
• CPC Class Codes: G01G 5/006 : with pneumatic means

Abstract

A support surface includes a cover defining an interior region, a mattress core located in the interior region, and a force sensor located in the interior region.

Claims

1. A patient support apparatus comprising:

a cover defining an interior region,

a support layer configured to support a patient in at least a horizontal position, the support layer being located in the interior region and including at least a first support section and a second support section spaced from the first support section, the first support section being articulatable to assume a non-flat orientation independently of the second support section while a patient is supported thereby,

a sensing layer spaced from the support layer and including at least a first sensing zone associated with the first support section, the sensing zone including at least one force sensor, and

a recordable medium including instructions executable to determine a patient weight derived from the at least one force sensor in consideration of the orientation of the first support section.

2. The apparatus of claim 1, wherein the recordable medium further includes instructions executable to determine an interface force derived from the at least one force sensor and to adjust a support characteristic of the support layer based on the interface force.

3. The apparatus of claim 1, wherein at least one of the force sensors is positioned underneath the support layer.

4. The apparatus of claim 1, wherein the sensing layer is located underneath the support layer, further comprising a second sensing layer including at least one force sensor located above the support layer.

5. The apparatus of claim 4, wherein the recordable medium includes instructions executable to determine an interface force derived from the at least one force sensor of the second sensing layer.

6. The apparatus of claim 5, wherein the support layer includes at least one inflatable bladder and the recordable medium includes instructions executable to adjust internal bladder pressure in the at least one inflatable bladder of the support layer based on the interface force.

7. The apparatus of claim 1, wherein at least the first support section of the support layer includes at least one inflatable bladder and the recordable medium includes instructions executable to adjust internal bladder pressure in the at least one inflatable bladder of the first support section of the support layer.

8. The apparatus of claim 1, wherein the recordable medium includes weight values derived from the at least one force sensor over time and includes instructions executable to determine weight change values derived from the weight values.

9. A patient support comprising:

a cover defining an interior region,

a support layer located in the interior region, the support layer having a head end, a foot end, and a plurality of support sections aligned longitudinally from the head end to the foot end to support a patient in at least a horizontal position, each support section including at least one independently controllable air zone,

a sensing layer spaced from the support layer and including an independently controllable sensing zone corresponding to each independently controllable air zone of the support layer, each sensing zone including at least one force sensor, and

a memory including sensor values derived from the force sensor and instructions executable to process sensor values stored in the memory over time to determine whether an alert condition is present and to automatically generate a caregiver alert if an alert condition is present.

10. The patient support of claim 9, wherein the alert condition is bottoming out of a patient positioned on the patient support.

11. The patient support of claim 9, wherein the alert condition is exiting of a patient positioned on the patient support.

12. The patient support of claim 9, wherein the support layer has a first side and a second side spaced by a width of the patient support, further comprising at least one support section aligned along the width of the patient support.

13. The patient support of claim 9, wherein the alert condition is a change in a vital characteristic of a patient.

14. The patient support of claim 13, wherein at least one of the force sensors is configured to monitor real-time pressure changes and the memory includes instructions executable to derive the vital characteristic from the real-time pressure changes.

15. The patient support of claim 14, wherein the sensing layer further includes at least one patient parameter sensor integrated therein.

16. The patient support of claim 15, wherein the patient parameter sensor is configured to sense at least one of heart rate, respiration rate, and temperature of a patient positioned on the patient support.

17. A patient support apparatus comprising:

a cover defining an interior region,

a support layer located in the interior region, the support layer including at least one independently controllable pressure section configured to support a patient,

a sensing layer spaced from the support layer and including at least one independently controllable sensing zone, the sensing zone including at least one force sensor associated with a pressure section of the support layer, and

a recordable medium including instructions executable to adjust pressure in an independently controllable pressure section of the support layer in response to a force sensed by a force sensor of an independently controllable sensing zone of the sensing layer.

18. The patient support apparatus of claim 17, wherein the support layer includes a plurality of substantially cylindrical cushions in a plurality of independently controllable zones.

19. The patient support apparatus of claim 18, comprising at least a head zone, a torso zone and a foot zone aligned along a longitudinal length of the patient support.

20. The patient support apparatus of claim 18, wherein at least one of the cushions is inflatable.