The difference between biological suture material and ordinary suture

Biological suture material (such as the gut) can be absorbed by the body, take out stitches can need not, take out stitches and ordinary sutures need.In terms of its function on makes no difference, but postoperative have to distinguish

Natural absorbability stitches

Surgical gut: can be divided into yesterday on gut and chromic catgut.Both by highly purified collagen.Surgical catgut absorption rate depends on the kind of line, the condition of organization type, organization, and the patient's general state, etc.Surgical catgut suture can be used for infected wounds, but at the moment, its absorption rate significantly faster.

General surgery catgut absorb quickly.Postoperative tensile strength can only maintain 7 to 10 days, and be totally absorbed in 70 days.Gut after chromate solution treatment called chromizing gut, can fight the enzymes in the digestive function, make the absorption time extended to 90 days or more.

Synthesis of the absorbability of money

Due to the natural gut antigenicity, response to a strong and disadvantages such as charge rate and capricious people is committed to the development of synthetic absorbable suture.The latter's application scope is widespread, from the chest wound closure to the application of eye surgery, etc.

Coated Vicryl suture (Polyglactin910) : its advantages as follows:

1. Through the tissue fluid;

2. The knot is smooth, accurate positioning;

3. Reduce the impaction of the organization's tendency;

4. Can be used for infected wounds suture.

Coating is fat fat and b/c (Polyglactin370) copolymer mixture, add calcium stearate.This coating has significant absorbability, adhesion and not be stripped of lubricity.

14 days after suture, tensile strength of the coated Vicryl suture retain about 65%.Suture after 21 days, 6 a 0 or more coarse type of tensile strength of suture retain about 40%, while 7 a 0 or more fine sutures retain only about 30%.Hardly absorbed within 40 days, the joints and 56 a 70 days are absorbed.The absorption of coating is also very quickly, the estimate is between 56 a 70 day.

Polydioxanone (PDS Ⅱ) suture: the significant progress of the single fiber stitches suture material.It soft, flexible and single fiber structure characteristics, absorption performance is good, can maintain the wound tensile strength more than six weeks (for other synthetic absorbable sutures twice), low response to a mild, and the affinity of bacteria.Applicable to a variety of soft tissue suture and can be used for pediatric cardiovascular, obstetrics, ophthalmology, plastic surgery, the digestive tract and colon surgery.

Similar to other synthetic absorbable sutures, PDS Ⅱ on every line in the body is absorbed by hydrolysis.The 14th day after the suture retain about 70% of the tensile strength, 28 days was 50%, 42 days was 25%.Within 90 days after stitching is hardly absorbed;After six months was completely absorbed (see figure 1)

MonocryI (PoIiglecaprone25) suture: this kind of single fiber suture knot strong flexibility, convenient operation, easy, no chemical action within the organization, can absorb as scheduled.Surgeons are commonly used to need a high intensity within 2 weeks of repair method, which is applicable to in addition to the nerves, blood vessels, ophthalmology and microsurgical operation outside of the subcutaneous suture, convolution and ligation of soft tissue, etc.7 days can retain the original strength of 50% ~ 60%, 14 days reduced to 20% ~ 30%, 21 days strength gone.91 a 119 - day is completely absorbed.

Suture materials (suturematerial) refers to the sutures for closed organization and methods.Points can be absorbed and do not absorb two categories.Absorbable sutures are mainly gut (gut).Have made two kinds of ordinary and chromium, chemical store in a sterile glass or plastic tube after sterilization.Ordinary catgut 7 days began to absorb, can be used for ligation suture and small animal skin.Chromium catgut 2 ~ 3 weeks began to absorb, multi-purpose 1-0 to 3 ~ 0 chromic catgut suture urethra, bladder, uterus and gastrointestinal mucosa, such as is not used for pancreatic surgery.Do not absorb suture, including silk, cotton, stainless steel wire, synthetic line, etc.[1]

The most commonly used in surgery for silk.The advantage of silk is resilient, reactive small, soft, easy to knot, not easy to slip, strong tension, low prices.The number ranged from 000 ~ 18, the greater the number, the more silk coarse, the greater the tension.Cotton thread tension as silk, rarely used.Stainless steel wire excitant small, pull, but not easy to knot, commonly used in fixed bone.Synthetic wire high tensile strength, small tissue reaction, knot but difficult, easy to slip.

Medical absorbable sutures

/ don't take (with needle)

All kinds of polyethylene glycol sutures, sutures, collagen suture, poly (lactic acid) (PLA) gut

Ⅲ. 2. Do not absorb the sutures

/ don't take (with needle)

All kinds of nylon, polypropylene, polyester suture, stainless steel suture, silk thread

Ⅱ. 3. Medical adhesive

Bone cement solidification of adhesive materials, such as medical alpha cyano acrylic acid lipid, tubal NianDu agent, vascular anastomosis adhesives, skin adhesive, adhesive tape, xanthan gum and chitosan

Ⅲ. 4. Surface suture materials

Skin suture, medical zipper

Ⅱ. Entry label:

Medical instrument

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