What is the silk thread for surgery made of?

There are many silk threads used in the operation. The following information is for your reference. It might help you.

1. Medical silk thread: two kinds: divided silk thread and round silk thread. It is a suture widely and basically used in surgery. Apply both hard and soft, and the operation is simple. It is often used to suture various tissues, organs and blood vessels in the body. The reaction in the tissue is small, but it is not absorbed in the body to form foreign bodies, which will affect the wound healing after surgical infection. Generally, the suture is mostly black, which is easy to distinguish from the tissue during operation. Commonly used wire models are "000", "0", "1", "4", "7" and "10", and the wire length is 60 cm or 70 cm. The model of assembly line is the same as that of plate line. At present, the group thread is less used in qualified hospitals and has been replaced by disposable medical board thread. Silk thread should not be disinfected repeatedly, so as not to affect the tension.

2. Non-destructive suture: there are two kinds of non-absorbable suture and absorbable suture.

(1) Non-absorbable threads include nylon thread (polyamide fiber thread), polyester knitted thread and polypropylene thread.

Nylon (polyamide fiber) thread: Polyphenolamine fiber suture thread, made of man-made fiber. The tensile strength and toughness are stronger than those of silk thread, and the reaction in tissue is small. The model is 6/0- 1 1/0, which is often used for vascular and nerve anastomosis and repair, and can also be used for tubal anastomosis.

Polyester knitting thread: polyester suture is the strongest suture except copper wire. Generally, it is woven from multiple strands and has high tensile strength. It is usually used for heart valve replacement, orthopedic muscle repair and microvascular anastomosis. Thick thread is 1 ~ 10, thin thread is 2/0 ~ 6/0, and tension reducing sewing is commonly used 10.

Polypropylene suture: also known as slip thread, is a non-inert suture made of propylene polymerization. Compared with polyamide fiber suture, it is easier to knot and has higher strength. It is mainly used to anastomose blood vessels and nerves. There are two kinds of imported and domestic products, and their models range from 2/0 to 6/0. When tying a knot with a slip thread, you must wet your hands to prevent them from breaking.

(2) Absorbable suture: it is an ideal suture at present, and its surface is coated with polyglycolic acid. It has the advantages of smooth surface, fast absorption, little damage and little tissue reaction. Its models are 0 ~ 9/0 and wide, with needles. Needles can be divided into large, small, round and triangular needles, which should be selected according to clinical use. It is often used to suture intestinal tract, biliary tract, muscle, joint capsule, uterus, peritoneum and other tissues and organs, and also used in ophthalmology and burn plastic surgery.

3. Medical catgut: It can be divided into ordinary catgut and chrome catgut, both of which can be absorbed. The length of absorption depends on the thickness of intestine and tissue, and it can be completely absorbed in 6 ~ 20 days. At present, the catgut adopts disposable aseptic packaging, which is convenient to use.

(1) Common catgut: an easily absorbable suture made of submucosa tissue of catgut or bovine gut. It is absorbed quickly, but the tissue has a slight reaction to the intestine. It is mostly used for ligating blood vessels, suturing infected wounds that heal quickly in tissues or subcutaneous tissues. Commonly used in the uterus, bladder and other mucous membranes.

(2) Chrome catgut: This catgut is made of chromic acid, which can slow down tissue absorption and has less inflammatory reaction than ordinary catgut. Generally, it is mostly used in gynecological and urinary system surgery, and it is often used in kidney and ureter surgery because silk thread will promote the formation of stones. When in use, it is soaked in salt water and straightened after softening, which is convenient for operation.

The models of medical catgut are 1#, 2#, 0#, 1/0, 2/0, 3/0, 4/0, 5/0, etc. At present, the use of medical catgut in large general hospitals is gradually decreasing, and it will be replaced by ideal absorbable suture.

4. Stainless steel wire: mainly used when strong tension suture is needed, such as tension suture of muscle repair team. Commonly used are thick (diameter 1. Omm), medium (5mm in diameter) and thin (6mm in diameter). Causing tissue reaction is the most difficult to sew, but it is not easy to knot, and the tip of steel wire is easy to puncture gloves. Several rubber tubes with a length of 1cm should be prepared for tension-reducing suture.