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Adhesive wound dressing and perforated shield
| Details |
Inventors: Gilbert, Eugene C.; Schenk, William N.;
Assignee: The B. F. Goodrich Company (Brecksville, OH)
Primary Examiner: Shay; Randy Citrin
Assistant Examiner: Prebilic; Paul
Attorney, Agent or Firm: Lobo; Alfred D., Shust; Nestor W.
A simple construction of a two-component adhesive film, external wound dressing, comprises a backing sheet of thin, preferably elastomeric and water vapor-permeable film protected by a release layer comprising two release sheets. The sheets not only protect the adhesive coating on the front face of the film, but also are instrumental in allowing the film to be precisely positioned over a wound, then gradually tensioned with a force no greater than the peel strength for the release sheets, while the dressing is applied. This feature of the dressing allows it to be smoothly applied over the wound with a predetermined amount of force while conforming the film to the contours of an injured body. This features is the result of providing each first and second release sheets with a relatively wide margin, at least 1.25 cm (0.5 inch) wide. The peel strength for each release sheet is essentially identical. In a first embodiment of the dressing, the first release sheet has a first side-margin defined by a fold line running laterally across the longitudinal axis; and the second release sheet has a second side-margin defined by an interrupting line of spaced apart incisions, slits or perforations. In the second embodiment of the dressing each of the release sheets has a side-margin defined by an interrupting line. In either embodiment, no greater force is required to peel each release sheet on either side of the fold line or interrupting line which defines a margin. Another embodiment of the dressing is an "island dressing" in which a pad of fabric has deposited in it, a layer of hydrophilic absorbent polymer to provide an absorptive dressing. The front surface of the pad may be coated with adhesive to facilitate application of the dressing, or be left uncoated. |
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DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS In the first embodiment, a "film only" external wound dressing (so termed to distinguish it from an "island" external wound dressing) is schematically illustrated as a rectangular dressing, in FIGS.
1-4, though the shape and size are arbitrary.
This wound dressing is indicated generally by reference numeral 10 in FIG.
1 which shows a top plan view in which the bottommost layer is a biocompatible adhesive 11 uniformly coating the entire front face of a continuous or microporous elastomeric film 12.
The film and adhesive coating are each typically less than about 2 mils thick, the latter being protected with flexible first and second release sheets 13 and 14 respectively, each strippably adhered to first and second portions of the adhesive coating, commencing from opposed side-margins m' and m' respectively, of the adhesive-coated rectangle.
The release sheets are typically less than 5 mils thick and cut from the same stock so that the peel strength, which is a measure of the degree of adhesion of each unit area of sheet stock to adhesive, is the same for each sheet.
Thus the force required to peel each release sheet from the adhesive is the same.
Release sheet 13 is folded upon itself along fold-line 15 which is paralled to, and spaced-apart (by the width of the margin m') from the outer side-edge of the sheet, so that the sheet's inner end (that is, the end opposite from the outer end lying along the outside edge of the rectangle) provides a gripping tab 13' which overlies the exterior surface of the release sheet 13.
The extent to which tab 13' overlies the portion 13 adhesively secured at margin m', is not narrowly critical provided it affords purchase for the thumb and index finger of a hand.
Thus, the tab 13' may extend to the side-edge of sheet 13 or beyond, but there is no reason to provide a larger tab 13' than can be conveniently gripped between the index and middle fingers.
The portion of the adhesive coating not covered by the folded release sheet 13 is covered by the second release sheet 14 which is in contact with the adhesive and strippably adhered thereto
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Cosmetic Surgery 
