Medical dressing and its preparation method and application

Abstract

The invention discloses a dressing for medical use, a preparation method and an application thereof. The dressing comprises one or more of chitin derivative, chitosan derivative or water soluble chitin 1-100 wt%, water 0-99 wt%, and filler 0-60 wt%. The preparation method comprises respectively dissolving one or more of the chitin derivative, chitosan derivative or water soluble chitin into water to obtain 0.5-10 wt% aqueous solution, mixing intensively, adding 0-15 wt% filler, mixing intensively, vacuum de-bubbling to obtain hydrocolloid dressing, and subsequently obtaining filmy dressing, spongeous dressing or non-woven fabric dressing. The preparation method has simple process, and can be used for restoring skin wound such as operative incision in clinic, skin graft region, burn, scald, ulcer or bedsore.

Description

technical field [0001] The invention relates to a medical dressing and its preparation method and application, belonging to the field of medical supplies and also the field of biological materials. Background technique [0002] Medical dressings are materials used to cover wounds. Their primary function is to control wound exudate and protect the wound from contamination by bacteria and dust particles. Wounds that heal better after covering them have been documented as far back as 4,500 years ago. Over the millennia, there have been many different types of dressings, but wound dressings have long been designed on the premise of keeping the wound dry . This concept has undergone a fundamental change since the 1960s. In 1962, the British Winter found that wounds healed faster in a wet state than in a dry state. Since then, "wet therapy" has gradually become the main theoretical basis for the design of new medical dressings. Since the 1980s, western developed countries have...