Bandage

Details Bandage Bandage

1999-12-23

2001-06-05

Brown, Michael A. (Department: 3764)

Surgery: splint, brace, or bandage

Bandage structure

C602S042000, C602S046000, C602S052000

Reexamination Certificate

active

06242665

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a bandage with a flat element on which an adhesive area is provided surrounding a non-adhesive area or a wound cover; and to a bandage strip with a strip-shaped flat element on which a non-adhesive area or a wound covering, extending in a longitudinal direction, is provided, and adhesive areas are provided on both sides of the non-adhesive area or of the wound cover, which also extend in the longitudinal direction and delimit the non-adhesive area or the wound cover transversely to the longitudinal direction when the application side is viewed from above; as well as to an incision bandage with a flat element on which an adhesive area is provided. Thus, this can be a bandage, but also a bandage strip, a post-operative wound dressing, a fixation bandage or an incision foil. As a rule, a continuous adhesive area (adhesive surface) is provided in the last mentioned two cases.
BACKGROUND OF THE INVENTION
A bandage with a wound cover and areas of different adhesiveness is known from European Patent EP-A-0 353 972.
SUMMARY OF THE INVENTION
With bandages there is a problem in that, on the one hand, they should adhere well to the skin surrounding the wound, but on the other hand they should adhere so lightly and should be removable in such a way that the previously damaged skin is gently treated. But they should also be removable causing as little pain as possible.
In accordance with the present invention, a bandage is provided with an adhesive area that comprises a first adhesive zone surrounding a non-adhesive area or a wound cover, as well as a second adhesive zone arranged outside of the first adhesive zone and surrounding it, and that at 0.5 to 2 N/25 mm, the adhesion of the first adhesive zone is less than that of the second adhesive zone of 2 to 8 N/25 mm; and to a bandage which has an adhesive area with a first, inner adhesive zone, which extends in the longitudinal direction and delimits the non-adhesive area of the wound cover, and a second outer adhesive zone extending in the longitudinal direction, and that, at 0.5 to 2 N/25 mm, the adhesive of the first adhesive zone is less than that of the second adhesive zone of 2 to 8 N/25 mm; and to a bandage which has an adhesive area with a first adhesive zone and a second adhesive zone arranged outside of the first adhesive zone, and that, at 0.5 to 2 N/25 mm the adhesion of the first adhesive zone is less than that of the second adhesive zone of 2 to 8 N/25 mm.
Advantageous further features lie in that the support for the adhesive zones comprise flat woven fabric, such as, for example, a cloth or a knit material; in that the support for the adhesive zones comprises a nonwoven material, nonwoven material lamination or a foil; in that the bandage is an incision foil or a fixation bandage; in that the support for the adhesive zones is embodied to be multi-layered and/or as a heterogeneous structure; in that the transition from a strong adhesion to a lesser adhesion is steady; in that the transition takes place as a continuous, preferably constant, gradient; in that the adhesive area as a whole comprises a first adhesive layer, and a second adhesive layer applied to the first adhesive layer in the area of the first adhesive zone or the second adhesive zone; in that the first adhesive layer has a strong adhesion and the second adhesive layer has a lesser adhesion; and in that a flat piece as a finger lift, preferably a strip of the same adhesion as that of the first adhesive zone, extends from the first inner adhesive zone of a lesser strength as far as the edge of the bandage, preferably a corner.
Thus, the outer adhesive area, i.e. the second adhesive zone applied on the edge, is provided with a greater adhesive strength. In a bandage, this adhesive zone is farther removed from the wound than the first adhesive zone, which has a lesser adhesive strength. It is therefore possible to apply a layer of greater adhesive strength in the second adhesive zone, which is sufficient for the desired good and lasting adhesion of the bandage on the skin surrounding a wound of the patient. The inner first adhesive zone can then be designed to be comparatively less adhesive. It basically only needs to assure the steady position of the bandage, and therefore the surroundings of the wound cover, for example. It is possible to assure in this way that, when being pulled off, the previously damaged skin is not stressed any more than necessary, i.e. much less than up to now, in spite of a relatively large adhesive zone.


REFERENCES:
patent: 3885559 (1975-05-01), Economou
patent: 5088483 (1992-02-01), Heinecke
patent: 5153040 (1992-10-01), Faasse, Jr.
patent: 0 353 972 A1 (1990-02-01), None
patent: WO 93/07843 (1993-04-01), None

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