Surgery: splint – brace – or bandage – Bandage structure – Skin laceration or wound cover
Patent
1996-01-26
1998-08-11
Apley, Richard J.
Surgery: splint, brace, or bandage
Bandage structure
Skin laceration or wound cover
602 47, 602 57, 128888, A61F 500
Patent
active
057920893
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a wound dressing, to a method of treatment of a wound and to a kit of parts for a wound dressing.
There are many variations of the standard type of wound dressing. The essential features of standard dressings are a wound contacting absorbent material which ideally is non-adherent to the wound, the dressing further comprising adhesive backing means to hold the absorbent material in place.
European Patent Application No. 0236104 discloses a wound dressing comprising a non-adhesive polymer film secured within a foam frame. The frame has a pressure-sensitive adhesive coated on one face, which secures the film to the frame and which extends outwards beyond the film to provide an adhesive surface for securing the dressing to skin around the wound. Preferably there is an absorbent material between the film and the wound. The dressing is designed to overcome the problems encountered with flexible adhesive films; namely the propensity of such films to fold back on themselves thereby self-adhering and the adherence of such films to the margins of the wounds when the dressing is being applied or removed. The frame prevents the film from folding back on itself. Furthermore non-adhesiveness of the film ensures that it does not adhere to the margins of the wound. The frame is dimensioned so that it is of sufficient size to surround the wound without touching the wound margins. Dressings of this kind suffer from the disadvantage that when it is desired to apply a new dressing to the wound, it is necessary to first remove the old dressing. A dressing may need to be removed and replaced by a new dressing several times before the wound has finally healed. Since the dressing is adhered to the skin surrounding the wound, this skin tends to become sensitive and friable with continued removal of the dressing.
A problem with most conventional dressings to a greater or lesser extent, is the tendency for the edge of the dressing to lift away from the skin during use. This failure of the edge seal commonly referred to as `lift-off` is particularly prone to occur when the dressing is on a part of the body which tends to experience a large degree of friction e.g. the buttocks, the elbows, knees and other such areas which tend to project and which if for example the person is bed-ridden come into constant contact with the bed. It will be appreciated that failure of the edge seal is highly undesirable for a number of reasons. Thus where the dressing has lifted away from the skin, it no longer provides an intact cover over the wound. This enables wound exudate to escape and potentially cause soiling of bedding and/or clothes. More importantly lifting of the dressing enables water and/or bacteria to reach the wound, either of which occurrences is highly undesirable.
A further problem associated with the use of conventional dressings is that where the area to be treated requires a number of dressing changes before healing of the wound has occurred, the skin may become sensitive due to the repeated removal of an adhesive article. Problems of this nature can become quite severe, in particular in already compromised persons.
Thus the object of the present invention is to overcome the above problems, namely to provide a dressing which can be reliably secured to the person by overcoming the problem of breakage of edge-seal and/or which enables an absorbent layer to be repeatedly removed from a person without causing the skin to become sensitised, even when the person is in a compromised state.
SUMMARY OF THE INVENTION
According to the present invention there is provided a wound dressing comprising an absorbent layer and an absorbent layer retaining means wherein the absorbent layer retaining means comprises a flange having an adhesive skin-facing surface and an opposed non-skin facing surface; which flange comprises an inner and an outer perimeter and wherein the absorbent layer is releasably attached to the non-skin facing surface of the flange by attachment means, characterised
REFERENCES:
patent: 4641643 (1987-02-01), Greer
patent: 4733659 (1988-03-01), Edenbaum et al.
patent: 4917112 (1990-04-01), Kalt
patent: 5060662 (1991-10-01), Farnsworth, III
patent: 5167613 (1992-12-01), Karami et al.
Neil Alan Stanley
Penrose Jane Edith
Apley Richard J.
Lee Kim M.
Smith & Nephew plc
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