JPH0199554A - Wrapping device for protection of wound - Google Patents

Abstract

PURPOSE: To obtain a material which accelerates healing and is suitable for a burn, etc., by coating the inner side of a wrapping implement with the first layer of microporous polytetrafluoroethylene(PTFE) having waterproof and steam permeable properties and forming the coating surface in such a manner that the surface is smooth and has non-adhesiveness to the wound. CONSTITUTION: The sheet material is a laminated sheet including the microporous PTFE and includes a layer 7 of the microporous PTFE film, a highly freely flexural reinforcing layer 8 of a steam permeable material like a knit of nylon or polyester and an intermediate layer 9 of a steam permeable and air impermeable material which is formed as a film on the first layer 7 and is adhered to the reinforcing layer 8. Since bacteria cannot pass the pores of the material, the material is capable of making the wrapping implement bacteriostatic. In addition, the wrapping implement allows the putting in and out of the steam and is, therefore, comfortable to a patient. The third layer existing between the microporous PTFE layer and the reinforcing material is the steam permeable and air impermeable hydrophilic layer. The layer controls the steam permeation of the wrapping implement, thereby substantially lowering the danger of overdrying the wound.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to packaging devices and materials for aiding in the healing of burns or other wounds and skin conditions on the human or animal body.

[Conventional technology]

Conventional methods for treating burns include wrapping the burn area in multiple layers with bandages. This method usually results in a very voluminous bandage, which often restricts hand freedom when treating the patient's hand. Another method of treatment, especially for burns on the hands, is to bandage the hand and then wrap it in a polythene bag. Most of these bags are occluded, which makes them uncomfortable due to the heat in the localized areas, and excessive moisture comes out from the localized areas, which can easily lead to ulcers. Frequent bag changes to allow the wound to breathe and dry will slow healing, but frequent bag changes increase the risk of infection.

[Problem to be solved by the invention]

The present invention aims to provide a dressing for burns or other wounds and suitable materials therefor that promotes healing and is more comfortable for the patient than traditional bandages or dressings.

[Means to solve the problem]

According to the present invention, the above-mentioned object is to provide a wrapping device for protecting a burn wound on a patient's extremities, which has approximately the same shape as the limb to be wrapped, and has one or two pieces. In a wound protection packaging device comprising the above laminated sheet, the laminated sheet includes a first layer (7) of microporous polytetrafluoroethylene (PTFE) having waterproofness and water vapor permeability; a second layer (8) of knitted fabric or other flexible, water vapor permeable reinforcing material; and a water vapor permeable and air impermeable layer interposed between said first layer and said second layer. and a third layer (9) of a material having properties, and the three layers are bonded together, and the first layer covers the inside of the container, and the coating surface is smooth and does not touch the wound. This is achieved by a wound protection packaging device that is characterized by non-adhesive properties.

Preferably, the water vapor permeable PTPE material is a microporous PTFE membrane that has been expanded by stretching (eg, by the method described in US Pat. No. 3,953,566).

This material allows the packaging to be bacteriostatic as bacteria cannot pass through the pores in the material and is comfortable for the patient as water vapor can enter and leave the packaging.

PTFt! In order to provide the membrane with sufficient strength, the membrane or first layer and the intermediate or third layer are combined with a reinforcing layer, the second layer. Preferably, this reinforcing layer is a knitted nylon or polyester fabric. When molded as a fingerless glove, the PTFE membrane is exposed on the inside. PTFE is a very low-friction material, so its surface is comfortable to contact with a burn or other wound without rubbing the wound or the cream applied thereon.

PTFE material and PTFE laminated sheet are GORH-T
It is commercially available under the registered trademark of EX.

The third layer located between the microporous PTFE layer and the reinforcement is a water vapor permeable and air impermeable hydrophilic layer. This layer controls water vapor transmission through the packaging, thereby substantially reducing the risk of the wound becoming too dry. Water vapor transmission rate is 10.00 per 24 hours under humid test conditions.
Desirably less than 0 g/m2. This hydrophilic layer is conveniently formed as a film on the outer surface of the PTFH membrane, and is disclosed in the inventor's US Pat. No. 4,199.
, 041 as hydrophilic. As stated in the above patent, “
Two types of commercially available hydrophilic materials have been found to exhibit the requisite properties of the present invention. One type is WRGrac
It is an organic polymer with a hydrophilic backbone, sold under the trademark Hypol by the company E. Hypol is a reactive prepolymer that can be crosslinked with water and/or polyfunctional amines, including blocked carbamate amines. Hypol has a polyoxyethylene backbone terminated with toluene diisocyanate groups. This structure is essentially a branched polyether with three reactive isocyanate (NGO) groups per molecule. Another type of hydrophilic material is E I duPo
It is a fluorocarbon with hydrophilic side groups, sold under the trademark Nafion by the company nt de Nemours. Nafion is a product of perfluorosulfonic acid, a copolymer of tetrafluoroethylene and perfluoro-3,6-dioxa-4methyl-7-
It is described as a monomer such as octene sulfuric acid. The hydrophilic coating on the PTFE membrane partially fills the pores of the PTFH and helps prevent excessive drying of wounds such as burns.

This is because this film not only prevents air permeation through the laminated sheet of knit fabric and PTFH membrane, but also reduces the dependence of the water vapor transmission rate of this laminated sheet on temperature and pressure.

Since this hydrophilic layer is located on the side of the PTFH membrane that is in contact with the knit fabric layer, it does not come into contact with wounds such as burns. Furthermore, because the hydrophilic layer is in this position, it is protected on both sides from being damaged during the sterilization process of the glove in an autoclave.

The packaging may be of simple construction so that it can be discarded after use, or it may be made durable so that it can withstand autoclave cleaning procedures. In order to secure the glove or bag to the patient's hand or other limb, a string made of the same material can be secured to the cuff by welding or the like. Although the coated microporous PTFE material itself is air-occlusive, burn dressing creams such as FLAl'1A-ZINE® typically contain bactericidal ingredients;
There is usually no need to seal the container to the patient to exclude all air.

Very good results were obtained with the use of protective packaging. When used in glove form on burns on a patient's hand, the wound is drier than before, yet has enough moisture to reduce pain, the limbs are not hot, and overall patient comfort is improved. It has increased. Also, the frequency of bandage changes was surprisingly reduced.

One patient wore the basic device for five days and his wound healing improved dramatically.

Simple fingerless gloves reinforced with nylon knit fabric can be used on outpatients, thereby significantly reducing or eliminating the time required for professionally trained nurses to change dressings. Such simple fingerless gloves can be made disposable. Durable fingerless gloves with a polyester knit reinforcement layer should be able to be used repeatedly after an autoclave cleaning process.

Fingerless gloves are manufactured as follows.

Two mirror-image shaped members are cut from the laminated sheet and placed back to back so that the knit fabric layers of each are in contact. A fusing device shaped to match the outer edge of the fingerless glove (excluding the entrance portion) is heated to the melting temperature of this plastic knit fabric and pressed against the outer edge portions of the two members. Heat from the device passes through the PTFH layer to the contacting edges of these two knit layers, and the two knit layers melt together at this heated area to form a waterproof fusion. After cooling,
Turn the fingerless glove inside out so that the PTFH layer is on the inside of the glove.

Fingerless gloves and other packaging devices according to the invention have been found to be advantageous as packaging for other types of open wounds. Furthermore, it provides a waterproof and vapor permeable (and therefore comfortable) packaging for the treatment of skin diseases. Therefore, it is useful for treating skin diseases such as those mentioned above using wood tar-based and other therapeutic agents that are difficult to maintain on the human body surface without the use of bandages (which are heavily colored by the therapeutic agent) or polythene bags.

In the following, the invention will be explained in more detail by means of examples with reference to the accompanying drawings.

[Example] On each side shown in Figures 2 to 4, the packaging is preferably made of two sheets of mirror image shape with respect to each other, and these two sheets are assembled as described above. Stack the edges together to form a container. The sheet material is, as already explained, a laminated sheet containing microporous PTFE, and as shown in FIG. an intermediate layer 9 of a water vapor permeable and air impermeable material.

If the packaging does not require complete waterproofness, the two mirror-image shaped sheets may be sewn together instead of being fused.

In the fingerless glove 10 shown in FIG. 2, the two sheets are shaped to form a fingerless part 10a and a cuff part 10b, and these parts are connected by a narrow wrist part 10c. ing. In this way, the fingerless glove can be comfortably secured to the patient's wrist by means of a knot mill (which can be fused to the wrist portion of one of the sheets).

Similarly, a tie cord can be fused or sewn to the sock 12 of FIG. 3 or the feed-through bag 13 of FIG. 4 as shown.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view, enlarged at a large magnification, of a part of the laminated seed used to create the packaging device of the present invention, FIG. 2 is a plan view of the fingerless glove according to the present invention, and FIG. FIG. 4 is a plan view of the sock (one side) according to the present invention, and a side view of a cylindrical wrapping device that wraps around the patient's upper arm and lower arm. 7-.-Layer of microporous PTFE membrane, 8-Reinforcement layer with high flexibility, 9-Intermediate layer.

Claims (11)

[Claims] 1. A packaging device for protecting burns and other wounds on a patient's extremities, which has approximately the same shape as the limb to be wrapped and comprises one or more laminated sheets. In the packaging device, the laminated sheet has waterproof properties,
Water vapor permeable microporous polytetrafluoroethylene (
PTFE) and a second layer (8) of knitted fabric or other highly flexible, water vapor permeable reinforcement.
) and a third layer (9) of water vapor permeable, air impermeable material interposed between the first layer and the second layer, the three layers being bonded together; A packaging device for protecting a wound, characterized in that the first layer covers the inside of the packaging device, and the coating surface is smooth and non-adhesive to the wound. 2. The wound protection packaging device according to claim 1, characterized in that it is in the shape of a fingerless glove. 3. The wound protection packaging device according to claim 1, characterized in that it is in the form of a cylindrical bag with an open end. 4. 3. The wound protection packaging device according to claim 2, wherein the fingerless glove has a hand portion and a cuff portion, and these portions are continuous with each other at a narrow wrist portion. 5. The first layer (7) is a stretched and expanded microporous PTF.
The wound protection packaging device according to any one of claims 1 to 4, characterized in that it is made of E. 6. Wound protection packaging according to any one of claims 1 to 5, characterized in that the third layer (9) is made of a hydrophilic material. 7. Wound protection packaging according to any one of claims 1 to 6, characterized in that the third layer (9) connects the first layer and the second layer. 8. The wound protection packaging device according to any one of claims 1 to 7, wherein the third layer (9) is a film coated on one side of the first layer (7). . 9. Wound protection packaging according to any one of claims 1 to 8, characterized in that the knitted fabric is made of nylon or polyester. 10. 10. A wound protection packaging according to any one of claims 1 to 9, characterized in that it has a tying cord fixed to the open end for fixing the packaging to a patient's extremities. 11. A material suitable for protecting burns or other wounds, comprising a layer of water vapor permeable microporous polytetrafluoroethylene membrane in direct contact with the wound, a knitted or woven reinforcing layer, and a water vapor permeable and air A wound protection material comprising an intermediate layer of impermeable material, the three layers being joined together.