Anti-decubing mattress pad

• US 5,303,436 A
• Filed: 01/13/1993
• Issued: 04/19/1994
• Est. Priority Date: 09/06/1991
• Status: Expired due to Term

• Current Assignee: KCI Licensing Incorporated (3M Company), Alden B. Hanson, Alden Laboratories, Inc., Chris A. Hanson, Eric C. Jay, Flowfit Medical, LLC, JAY Medical, Ltd., Pressure Relief Technologies, Inc., Quickie Designs, Inc., Sunrise Medical Incorporated
• Original Assignee: JAY Medical, Ltd.
• Inventors: Runkles, Richard R., Denton, Grant C., Dinsmoor, John C. III, Jay, Eric C.
• Primary Examiner(s): Grosz, Alexander
• Application Number:
  US08/004,137
• Time in Patent Office: 461 Days
• Field of Search: 5/481, 5/464, 5/448, 5/653, 5/900.5, 297/DIG. 1
• US Class Current: 5/719
• CPC Class Codes: A47C 27/144 inside the mattress or cushion
• CPC Class Codes: A47C 27/148 of different resilience
• CPC Class Codes: A61G 7/05715 with modular blocks, or inserts, with layers of different material
• CPC Class Codes: A61G 7/05738 with fluid-like particles, e.g. sand, mud, seeds, gel, beads
• CPC Class Codes: Y10S 5/909 Flowable viscous, e.g. gel material containing
• CPC Class Codes: Y10S 5/922 with hook and loop type fastener
• CPC Class Codes: Y10S 5/926 Low friction, e.g. slippery material

Abstract

A mattress pad primarily intended for use with a standard hospital bed frame to reduce the development of decubitus ulcers or bed sores in patients using the pad. The pad is multi-layered and includes a cover or casing containing interior strata of a plastic film layer atop a fluid bladder layer supported on an underlying layer of foam. The pad is specially designed to reduce lateral and normal pressures and forces on the patient which can lead to the development of such ulcers. The reduction of the lateral shearing forces is accomplished in a number of ways including by oversizing the plastic film layer and fluid bladder layer on the underlying layer of foam and by positioning microbeads between the plastic film layer and fluid bladder layer to dramatically reduce the frictional drag or lateral shearing forces between the layers. Similarly, the normal pressures and forces are reduced and controlled in a number of manners including oversizing, modifying the configuration, filling, and size of the discrete fluid pouches of the fluid bladder layer, and varying the spring characteristics of the support columns in the underlying foam layer by hollowing them out to differing degrees, adjusting their spacing, and selectively tying adjacent columns together.

Claims

1. A pad primarily intended for use as a hospital mattress to reduce the development of decubitus ulcers in patients using the pad, said pad including:

a first layer having a plurality of discrete spring elements, said spring elements being upstanding columns having free standing, upper end portions and being made of resilient foam wherein adjacent pairs of said spring elements have vertically extending gaps therebetween spacing said adjacent pairs apart and said spacing varies between respective pairs of said spring elements to vary the spring characteristics of said upstanding foam columns, each of said upstanding foam columns having a base and a free standing, upper end portion with an upper surface and sides extending between the base and upper surface of each foam column, said pad further including means to attach together side walls of adjacent columns at a locations along said side walls between the based and upper surfaces of the adjacent foam columns to vary the spring characteristics of said attached, adjacent foam columns.

2. The mattress pad of claim 1 wherein said attaching means attaches pairs of adjacent foam columns together at varying vertical locations.

3. The mattress pad of claim 1 wherein said attaching means attaches said side walls together in a substantially abutting relationship at said location.

4. The mattress pad of claim 1 wherein bases of adjacent columns are attached to one another.

5. A pad primarily intended for use as a hospital mattress to reduce the development of decubitus ulcers in patients using the pad, said pad including:

a first layer having a plurality of discrete spring elements, each spring element being resilient and having a free standing, upper end portion with adjacent free standing, upper end portions of adjacent spring elements being separated with a vertically extending gap therebetween, said gap extending downwardly for a first distance and said pad further including means to attach said adjacent spring elements to each other across said gap at a location down the gap less than said first distance.

6. The mattress pad of claim 5 wherein said spring elements are upstanding columns made of foam.

7. The mattress pad of claim 6 wherein said upstanding foam columns have bases and the bases of said adjacent foam columns are attached to one another.

8. The mattress pad of claim 6 wherein said attaching means attaches pairs of adjacent foam columns together at varying vertical locations.

9. The mattress pad of claim 6 wherein said attaching means attaches said adjacent foam columns together in a substantially abutting relationship at said location.

10. The mattress pad of claim 6 wherein said upstanding columns have hollowed-out cores.

11. The mattress pad of claim 10 wherein said hollowed-out cores vary in size to create varying spring characteristics from one foam column to another.

12. The mattress pad of claim 11 wherein said hollowed-out cores vary in shape to create varying spring characteristics from one foam column to another.

13. The mattress pad of claim 10 wherein the spring characteristics of said upstanding foam columns are non-linear.

14. The mattress pad of claim 6 wherein each of said upstanding foam columns has a base.

15. The mattress pad of claim 14 wherein the bases of said foam columns vary in size.

16. The mattress pad of claim 14 wherein the upper surfaces of said foam columns vary in size.

17. The mattress pad of claim 14 wherein said foam columns have sides extending substantially vertically between the base and upper surface of each foam column wherein the spacing between side walls of adjacent columns varies.

18. The mattress pad of claim 5 wherein adjacent pairs of said spring elements have vertically extending gaps therebetween spacing said adjacent pairs apart and said spacing varies between respective pairs of said spring elements to vary the spring characteristics of said upstanding foam columns.