As a covering at the wound, the medical dressing can replace the damaged skin as a temporary barrier to avoid or control wound infection and provide an environment conducive to wound healing. Medical dressings can be divided into traditional dressings and new dressings.
Traditional dressings consist of natural plant fibers or animal hair materials, such as gauze, cotton pads, wool, various types of oil gauze, etc. These dressings are only temporary covering materials, which need to be replaced within a certain period of time. At present, traditional dressings mainly refer to medical absorbent cotton gauze, cotton pads and Vaseline gauze, etc., which are the main dressings used clinically. The traditional dressing has a mesh woven structure, which has low price, relatively simple manufacturing process, wide source of raw materials, soft texture, strong absorption capacity, can prevent the accumulation of fluid in the wound surface, and has a certain degree of protection for wound healing. Widely used in skin wounds. However, traditional dressings also have obvious shortcomings, such as not keeping the wound moist and delaying the healing of the wound; the granulation tissue of the wound easily grows into the mesh of the dressing, and it is easy to adhere to the wound of the wound when the dressing is changed, which damages the new granulation tissue and causes pain; The post-barrier effect is poor, which is likely to cause exogenous infection and poor hemostasis. In order to solve these problems of traditional dressings, people have adopted physical or chemical methods to improve the effect of traditional dressings, but the clinical application effect is not very satisfactory.
According to the materials used, the new dressings can be divided into four categories. The first category is natural dressings, which mainly include chitosan dressings, alginate dressings, animal dressings and collagen dressings. The second type is synthetic dressings, mainly including film dressings, foam dressings, hydrocolloid dressings, hydrogel dressings. The third type is a medicinal dressing (application of a drug to a dressing by dipping or coating, such as an ointment dressing, a sterilized dressing, and a Chinese dressing, etc.). The fourth category is tissue engineering dressings (currently, tissue engineering skin is still quite far from ideal requirements).
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