Medical dressings
Medical dressings treated with one or more poloxamers show reduced tendency to adhere to the wound interface on removal, thereby reducing traumatisation and promoting healing.
1 . An absorptive dressing for an exudative wound, wherein at least that part of the dressing intended for contact with the wound has been coated with at least one poloxamer, and wherein the absorptive part is an alginate.
2 . A dressing according to claim 1 , wherein the dressing is highly absorbent.
3 . A dressing according to claim 1 which is not saturated with poloxamer.
4 . A dressing according to claim 3 , wherein the amount of poloxamer is between 0.5% and 200% by weight of the absorptive part of the dressing.
5 . A dressing according to claim 4 , wherein the amount of poloxamer is between 1% and 50%.
6 . A dressing according to claim 1 wherein the dressing is fibrous.
7 . A dressing according to claim 1 having a backing which is impermeable to water and wound exudate.
8 . A dressing according to claim 1 wherein the poloxamer is selected from one or more of P188, P234, P237, P331, P338 and P407.
9 . A dressing according to claim 1 wherein the poloxamer has been applied thereto in at least two coats.
10 . A dressing according to claim 1 wherein the poloxamer coating comprises at least two poloxamers.
11 . A dressing according to claim 10 , wherein the poloxamers are P407 and P331.
12 . A dressing according to claim 1 wherein at least one additional therapeutically active substance is incorporated with the poloxamer.
13 . A dressing according to claim 12 , wherein the additional substance is selected from at least one of the group consisting of local anaesthetics, antibacterials, antifungals, anti-inflammatory agents, anti-cancer agents and wound treatment agents.
14 . A dressing according to claim 13 , comprising a local anaesthetic as an additional substance.
15 . A dressing according to claim 14 , wherein the local anaesthetic is lidocaine.
16 . A dressing according to claim 1 comprising fibrous alginate treated with a poloxamer and a local anaesthetic, comprising lidocaine.
17 . A process for the preparation of a dressing according to claim 1 comprising exposing a suitable dressing, with or without a backing, to a poloxamer, or solution thereof.
18 . A process according to claim 17 , wherein the solution is aqueous or non-aqueous.
19 . A process according to claim 18 , wherein said solution is a solution of poloxamer in acetone.
20 . A process according to claim 17 wherein the poloxamer, or solution thereof, comprises at least one additional therapeutically active substance.
21 . A process according to claim 20 , wherein the additional substance is lidocaine.
22 . A process according to claim 17 which is repeated and wherein the poloxamer, or solution thereof, is the same or different for each time the process is performed.
23 . A process according to claim 22 , wherein at least one poloxamer or solution thereof comprises at least one additional therapeutically active substance.
24 . A process according to claim 17 where said dressing is exposed to a solution of poloxamer and is dried, or substantially dried, before use or before a repeat of the process.