Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Wearing apparel – fabric – or cloth
Patent
1994-09-14
1996-07-30
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Wearing apparel, fabric, or cloth
424443, 424444, 424445, 424449, A01N 2534
Patent
active
055409229
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/SE93/00291, Mar. 30, 1993.
FIELD OF THE INVENTION
The present invention relates to an absorbent wound dressing comprising a layer of hydrophobic silicone gel which is intended to lie against the wound surface in use, a layer of carrier material which carries the gel layer and affords the requisite strength to said layer, and an absorbent body which is placed on that side of the carrier material and gel layer which lies distal from the wound surface in use, wherein the carrier material and the gel layer have mutually coinciding penetrating perforations at least within the region of the absorbent body.
BACKGROUND OF THE INVENTION
Applicant's European Patent No. 0,261,267 discloses a wound dressing which is comprised of a textile material that has been impregnated with silicone gel. The silicone gel may be comprised of a hydrophobic silicone gel of the same type as that used in the dressing Mepitel.RTM. retailed by Applicant. The patent specification mentions the possibility of using this wound dressing together with an absorbent body when the dressing is used for weeping wounds or sores. In order to ensure that the absorbent body will remain seated in the wound area in such applications, it is necessary to secure the body with a retaining layer after having applied the absorbent body to the wound, this retaining layer conveniently having the form of an elastic bandage. This use of Applicant's Mepitel.RTM. dressing is highly appropriate in the case of heavily weeping wounds or sores, when the absorbent body needs to be changed at given intervals, since the Mepitel.RTM. dressing can be left on the wound or sore during several absorbent body changes, which is particularly beneficial in the case of sensitive wounds. In the case of other applications, and particularly those applications when the entire dressing shall be removed after a given period of time, the aforesaid method of application can be experienced as troublesome and time-consuming. Furthermore, in the case of this kind of dressing, there is a risk that fluid from the wound will leak from the absorbent body and the retaining layer and fasten on the clothes of the person carrying the dressing. Furthermore, there is always a risk of infecting the wound when the dressing is removed.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an absorbent wound dressing of the kind defined in the introduction which can be easily applied and which will fully eliminate, or at least greatly eliminate the risk of fluid leaking from the dressing.
In accordance with the invention, this object is achieved with an absorbent wound dressing of the aforedefined kind which is characterized by a fluid barrier layer on that side of the dressing which faces away from the wound surface when the dressing is in use, which fluid barrier layer is preshaped in the region of the absorbent body to a form which is complementary to the shape of the absorbent body projecting from the carrier-material and gel layers. Since the absorbent body is initially fastened to the remainder of the dressing, such a dressing can be applied much more easily than Applicant's known dressing, while preventing leakage at the same time and due to the preshape this will ensure that no tension or stresses remain in the fluid barrier layer subsequent to its application to the rest of the dressing, these tensions being otherwise difficult to avoid when the fluid barrier layer is shaped in conjunction with its application to the rest of the dressing and which can cause the dressing to curl at the edges thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference to preferred embodiments of an absorbent wound dressing and also with reference to the accompanying drawings, in which
FIG. 1 is a cross-sectional view of a first embodiment of an inventive absorbent wound dressing; and
FIG. 2 is a cross-sectional view of a second embodiment of an inventive absorbent wound dressing.
DETAILED DESCRIPTION OF THE INVENTION
REFERENCES:
patent: 4664662 (1987-05-01), Webster
patent: 4928681 (1990-05-01), Langston et al.
patent: 4957795 (1990-09-01), Riedel
patent: 5340363 (1994-08-01), Fabo
patent: 5352508 (1994-10-01), Cheong
Benston, Jr. William E.
Molnlycke AB
Page Thurman K.
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