Surgery: splint – brace – or bandage – Bandage structure – Skin laceration or wound cover
Patent
1994-03-10
1996-12-17
McDermott, Corrine M.
Surgery: splint, brace, or bandage
Bandage structure
Skin laceration or wound cover
602 48, 602 52, 602900, 424447, A61F 1300
Patent
active
055848010
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to wound coverings. More particularly, it relates to wound coverings comprising a polyurethane resin film having an excellent water vapor permeability (hereinafter referred to simply as a polyurethane film), or laminate comprising such a polyurethane film and an absorptive cloth.
BACKGROUND TECHNIQUE
The properties mainly required for wound coverings are 1. adhesiveness, 2. flexibility, 3. durability, 4. ease in handling, 5. shelf stability, 6. blocking property against bacteria, 7. affinity to a vital body, 8. hemostatic property, 9. water-vaporization controlling ability, 10. exudate-draining property, etc.
In treating a wound such as a burn, although the treating method depends on the depth and area of the wound, it is common to use a wound covering comprising a polyurethane resin or a silicone resin, or an artificial skin (a wound covering) made of e.g. chitosan, collagen or a chitosan-collagen complex (Japanese Unexamined Patent Publication No. 253065/1986), or to apply a cream containing an antibacterial agent (Geben cream, trade name) to the burn, cover it with a gauze and fix the gauze by a bandage.
In the method in which a cream containing an antibacterial agent (Geben cream, trade name) is applied to the burn, and a gauze is put thereon and fixed by a bandage, it is necessary to change the gauze in a frequency of from several times per day to once in several days, and there are problems that cumbersome operations give a great deal of pain to a patient and require substantial care by the treating person.
Further, among wound coverings currently used, few have properties 1. to 10. described above, and they are still far from being satisfactory.
On the other hand, a cultured skin which uses cells derived from the skin and is aimed at a permanent take, is used in treatment of a burn patient, in addition to a wound covering which covers the wound surface temporarily. However, it is difficult for a cultured skin to maintain a constant take rate because of its weakness in physical strength and resistance against infection. In order to improve the take rate of a cultured skin, it is important to form a better transplantation bed. It is also desired to study such a covering which is capable of providing a suitable environment for the take of such a cultured skin.
DISCLOSURE OF THE INVENTION
The object of the present invention is to overcome (1) the drawbacks in the method wherein a cream containing an antibacterial agent (Geben cream, trade name) is applied to a burn, and a gauze is placed thereon and fixed with a bandage, and (2) the drawbacks of the currently used wound coverings. Namely, it is an object of the present invention to provide a wound covering, of which the side in contact with an affected part such as a burn is made of a film-like material with excellent adhesive properties to a vital body and excellent detachment ability from the wound surface, and if necessary, an absorptive cloth is provided on the other side to improve the water-vaporization controlling ability, and an antibacterial agent is incorporated in the film or the cloth to provide blocking properties against bacteria. It is also an object of the present invention to provide a wound covering which has a function that exudate, which has an adverse effect in treatment if it stays at the affected part, can be drained off easily. It is also an object of the present invention to provide a wound covering that is easy to handle.
Namely, the present invention provides a wound covering comprising a film of a polyurethane resin, or a laminate of the polyurethane film and an absorptive cloth, wherein an antibacterial agent is incorporated in the polyurethane film or the cloth, and perforations are formed at least on the polyurethane film.
BEST MODE FOR CARRYING OUT THE INVENTION
Now, the wound covering of the present invention will be described in detail.
The polyurethane resin to be used for the polyurethane film of the present invention may be any polyurethane resin, as long as it
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Kuroyanagi Yoshimitsu
Sato Hiromu
Shioya Nobuyuki
Tsunoda Masaru
Kotec Limited
McDermott Corrine M.
Mitsubishi Kasei Corporation
Smith Chalin
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