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catgut suture
Catgut suture is a type of surgical suture that is naturally degraded by the body's own proteolytic enzymes. Absorption is complete by 90 days, and full tensile strength remains for at least 7 days. This eventual disintegration makes it good for use in rapidly healing tissues and in internal structures that cannot be re-accessed for suture removal.
Catgut suture has high knot-pull tensile strength and good knot security due to special excellent handling features. It is used for all surgical procedures including general closure, ophthalmic, orthopedics, obstetrics/gynecology and gastrointestinal surgery. It is absorbed faster in patients with cancer, anemia, and malnutrition. It also absorbed faster when used in the mouth and the vagina, due to the presence of microorganisms.
Catgut has largely been replaced by synthetic absorbable polymers such as Vicryl and polydioxanone. It is not used at all for human surgery in some countries. In Europe and Japan, gut sutures have been banned due to concerns that they could transmit bovine spongiform encephalopathy (mad-cow disease), although the herds from which gut is harvested are certified BSE-free.
==History==
The first known absorbable sutures were made of the intestines of sheep. The manufacturing process was similar to that of natural musical strings for violins and guitar, and also of natural strings for tennis racquets. Galen used gut strings for medical sutures.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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