First of all, the intestine is made of the submucosa of sheep's small intestine. Because it belongs to an exogenous protein, it will cause obvious tissue reaction in human body. Therefore, using too much and too thick catgut will aggravate the inflammatory reaction of the wound.
Second, synthetic fiber thread. With the progress of science and technology, more and more synthetic fiber threads are used in clinic. They are all high molecular polymers, and have the advantages of light tissue reaction, strong tension resistance, long absorption time and antibacterial effect. This kind of thread is elastic, so four or more knots are required.
Nonabsorbable suture
There are dozens of kinds of mulberry silk thread, cotton thread, stainless steel thread, nylon thread, tantalum thread, silver thread and hemp thread. According to the different tensile strength and thickness of suture, it is also divided into different models. The greater the positive number, the thicker the suture and the greater the tensile strength. The most commonly used silk thread in clinic has the advantages of small tissue reaction, soft texture, easy knotting, strong tension resistance, high temperature sterilization resistance, low price and easy source. The disadvantage is that it is a permanent foreign body in the tissue, and it is easy to form sinus after wound infection. Suture of biliary tract and urinary tract can cause stone formation. The use and tension resistance of cotton thread are not as good as that of silk thread, but the tissue reaction is light and the tension resistance is maintained for a long time, and the usage is the same as that of silk thread. Metal wire includes stainless steel wire and tantalum wire, which has simple sterilization, little stimulation and high tension resistance, but it is not easy to knot. It is often used for suture of bone, tendon and fascia, tension-reducing suture or tooth fixation in oral cavity. Nylon silk has little tissue reaction and can be made into very thin thread, which is mostly used for small blood vessel suture and plastic surgery. When it is used to sew small blood vessels, it is often made into a broken suture. Its disadvantage is that the knot is easy to loosen and break when the ligation is too tight, which is not suitable for deep tissue suture with tension.
There is a special kind of wound suture needle, the hook is curved. In the absence of special stitches, tiny stitches can also be used to sew wounds, but it is very difficult to operate and skilled people can do it.
Wound suture method
Preparatory work:
1. anesthetic: lidocaine +E or lidocaine (one of them), alcohol cotton.
2. Needles: No.26 needle (for anesthesia needle), 5CC/3CC/RI needle (one of three choices), 20CC syringe.
3. Sewing bag: small plastic, large plastic and large sewing box bag (choose one from three).
4. Line package
5.CD box 1: high-quality cotton * 6, not applicable * 6, gauze * 6 (as the case may be)
6.CD box 2: inverted N/S
7. sterile gloves
8.3M
Suture step
Opening: First open the sewing bag, throw the needle cylinder and thread bag on it, change the 5CC/3CC needle into 26 stitches, and punch the CD box.
Open.
Wear it with you: sterile gloves wears one hand first, and the glove-free hand holds lidocaine. You can use your hands without gloves first.
Eliminate lidocaine with cotton wine and put it in a bottle.
In the needle part, the bottle is turned upside down and the gloved hand takes the needle again.
Xcc air should be injected before.
To promote the withdrawal of anesthetic.
Peripheral elimination: BI is used twice, mainly to eliminate the needle point and its surroundings, depending on the patient's tolerance.
mouth
Surround the wound: don't directly hit the wound, hit both sides of the wound, and the fewer holes caused by the injection, the better. If it is a finger, take it.
Digital nerve block
Peripheral washing: Install a 5CC/3CC needle with a 20CC syringe and wash it with a pump.
Covering: wear the other glove first, then use BI twice to eliminate the wound and its surroundings, and lay a hole towel.
Perisewing: Start sewing. More gauze can be used to wipe the oozing blood.
Surrounding paste: after sewing, paste it with gauze.