Gel-based therapy member and method

• US 4,671,267 A
• Filed: 08/01/1986
• Issued: 06/09/1987
• Est. Priority Date: 05/30/1984
• Status: Expired due to Term

• Current Assignee: Edward I. Stout
• Original Assignee: Edward I. Stout
• Inventors: Stout, Edward I.
• Primary Examiner(s): Dixon, Jr., William R.
• Assistant Examiner(s): Capella, Steven
• Application Number:
  US06/891,632
• Time in Patent Office: 312 Days
• Field of Search: 128/155, 128/156, 128/380, 128/381, 128/382, 128/402, 604/291, 604/304, 604/307, 604/308, 424/DIG. 13
• US Class Current: 602/2
• CPC Class Codes: A61F 2007/0001 Body part
• CPC Class Codes: A61F 2007/0242 heated by microwaves
• CPC Class Codes: A61F 2007/0268 having a plurality of compartments being filled with a heat carrier
• CPC Class Codes: A61F 7/02 Compresses or poultices for effecting heating or cooling
• CPC Class Codes: A61L 26/0014 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 26/008 Hydrogels or hydrocolloids
• CPC Class Codes: C08L 33/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers

Abstract

Improved therapy members useful for treating of sprains, muscle aches, orthopedic and skin injuries such as burns and other wounds are provided which make use of a pliable, self-sustaining, moisture sorbing gel including a humectant such as glycerin entrapped within a synthetic resin polymer matrix (e.g., a matrix containing acrylic acid or acrylamide monomer moieties). In one preferred embodiment, a body of the gel is encased within heat and moisture-permeable stretch fabric, and securing ties or the like are provided to permit the composite to be conformed to a body part and held in place. In use, such therapy wraps are either heated (as in a microwave oven) or refrigerated, so as to provide appropriate thermal treatment; it has been found that the preferred gel of the invention retains its pliability and other physical properties over a very broad temperature range, such as -20° to 305° F., and therefore the wraps of the invention can be used in many treatment contexts. It has also been discovered that the gel material can be applied directly to injured skin to in effect create a temporary skin with ideal air permeability. Furthermore, the moisture absorbing and desorbing properties of the gel create a moisture equilibrium between the gel, damaged skin and the atmosphere, thus promoting rapid healing.

Claims

1. A method of treating a body part of a patient, comprising the steps of:

providing a therapy member including a body of self-sustaining, non-flowable, pliable gel having a water soluble humectant entrapped within a polymeric matrix having therein acrylic acid or acrylamide monomer moieties, said gel body being at least partially encased within a moisture and heat-permeable cloth, said gel being characterized by the properties of maintaining said self-sustension and pliability over a temperature range of from about -20°

to 350°

F., and of absorbing and desorbing moisture through said cloth;

pretreating said member by altering the temperature of said gel body to a level significantly below or above body temperature while maintaining the pliability and moisture sorbing characteristics of the body; and

applying said pretreated member to said body part by placing said gel body in close, generally conforming proximity to the body part for heating or cooling of the body part.

2. The method as set forth in claim 1, including the step of completely encasing said gel body in said cloth.

3. The method as set forth in claim 1, including the step of affixing said pretreated member to said body part.

4. The method as set forth in claim 1, said humectant being present at a level of from about 20 to 85% by weight in said gel body.

5. The method as set forth in claim 1, said humectant being present from the group consisting of glycerin, ethylene glycol, propylene glycol, dimethyl sulfoxide and dimethyl formamide.

6. The method as set forth in claim 1, said matrix comprising a polymer of acrylamide.

7. The method as set forth in claim 1, said gel having a thickness of from about 1/4 to 11/2 inches.

8. The method as set forth in claim 1, including the step of altering the temperature of said gel body to a temperature within the range of from about -20°

to 350°

F.

9. The method as set forth in claim 1, said polymeric matrix being selected from the group consisting of the polymers, copolymers and terpolymers containing acrylic acid or acrylamide monomer moieties.

10. A method of treating injured skin, comprising the steps of:

providing a therapy member including a body of self-sustaining pliable gel, said gel comprising from about 10 to 25% by weight synthetic polymeric matrix, from about 10 to 50% by weight water, and a substantial quantity of water soluble humectant entrapped within said matrix, said gel body being characterized by the property of absorbing and desorbing moisture; and

placing said gel body in direct contact with said injured skin while said body retains said humectant entrapped therein, said matrix permitting, and said humectant being present at a level for, exchange of humectant when moisture is absorbed from said skin in order to keep skin moisture levels relatively low.

11. The method as set forth in claim 10, said matrix including acrylic acid or acrylamide moieties therein.

12. The method as set forth in claim 10, said humectant being present at a level of from about 20 to 85% by weight in said gel body.

13. The method as set forth in claim 10, said member consisting essentially of said gel body.

14. The method as set forth in claim 10, said humectant being selected from the group consisting of glycerin, ethylene glycol, propylene glycol, dimethyl sulfoxide and dimethyl formamide.

15. The method as set forth in claim 10, including the step of leaving said gel body in direct contact with said injured skin for a period of from about 2 to 21 days.

16. The method of claim 10, wherein the skin in direct contact with the gel body is burned.

17. The method as set forth in claim 11, said polymeric matrix being selected from the group consisting of the polymers, copolymers and terpolymers containing acrylic acid or acrylamide monomer moieties.