Wound dressing for the controlled release of active substance to wounds, and process for its manufacture

US6399091B1 · kind B1 · utility

Assignee

• LTS Lohmann Therapie-Systeme AG · DE

Inventors

• Achim Berthold · Andernach, DE
• Walter Muller · Neuwied, DE
• Frank-Ulrich Flother · Schaffhausen, CH
• Rainer Naeff · Langwiesen, CH

Key dates

• Filing date: Jun 1, 2000
• Grant date: Jun 4, 2002
• Expiry date: Jun 1, 2020

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M31/002
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A wound dressing for the controlled release of active substance to wounds, especially of wound healing-promoting substances to slow-healing, chronic wounds, is characterized in that said wound dressing has a layered structure for the purpose of absorbing liquid, especially wound exudate, under volume increase, said layered structure at least comprising one polymer-containing layer (1), one woven fabric-like or nonwoven-like layer (2) and at least one active substance, and in that the polymer-containing layer (1) contains hydrocolloid-containing swellable hydrogel as absorbent for liquid.