Application of biological fiber in modern medical field

Chitin is a kind of special cellulose, which is rich in resources. Chitin can be made into a soluble substance called chitosan by treating it with concentrated alkali to remove the acetyl group. They not only have good biocompatibility and biodegradation, but also have considerable biological activity as an alkaline polysaccharide. They are an absorbable implant material with great development potential

Therefore, chitin has been widely used in the medical field: (1) it is used as absorbable surgical suture. Chitin is mainly used in digestive system surgery and plastic surgery（ 2) Used as a medical dressing. The ******* biological dressing made of chitin, anti ********************************************************************************（ 3) For artificial blood vessels. The United States published a world patent in 1996, which uses chitin to make artificial blood vessels. The inner diameter is less than 6mm, the inner wall is smooth, and blood cells will not condense to keep the lumen unobstructed（ 4) Used as medical microcapsules. The cationic properties of chitin react with the negatively charged polymer of carboxymethyl fiber to prepare different types of microcapsules, which makes the culture of high concentration cells possible（ 5) Used as a hemostatic and wound healing agent. Contrary to the anticoagulant effect, some derivatives of chitin have excellent coagulation and promote wound healing（ 6) For repairing bone tissue. Chitin can directly act on bone bud cells to promote its molecular derivation and bone mineral synthesis, so as to improve the activity of alkaline phosphatase and accelerate the formation and repair of bone matrix