CN2075073U - Artificial small blood ressed weaved by machine - Google Patents

Abstract

The utility model discloses an artificial small blood vessel weaved by machine, whose diameter is from 5 mm to 0.6 mm. A vessel wall adopts the structure of hanks of yarns combined with flat grain or cross grain, and adopts the technology of heat-treated shaping in boiling water. The utility model can be freely bent; the vessel wall does not dent or collapse; the edge of the incision does not run down; the amount of capillary hemorrhage is suitable. Proved by the animal experiment and clinical application, the utility model can be applied to the artery and vein with good effect, and is a comparatively ideal substitute for the small vessel in the surgical operation.

Description

Artificial small blood ressed weaved by machine

This utility model belongs to medical artificial organ field, is specifically related to a kind of machine made synthetic small blood vessel.

According to the medical industries custom, little blood vessel is meant the blood vessel of diameter less than 1mm.The alleged synthetic small blood vessel of this utility model is meant the machine made synthetic small blood vessel between the diameter 5mm to 0.6mm.

When the human body normal blood vessels is suffered accidental injury, or when forming not recoverable infringement because of the obstruction of suffering from disease such as aneurysm and certain reason taking place, in order effectively to treat, at present domestic and international medical circle mostly adopts artificial blood vessel to substitute.Therefore, the research of artificial blood vessel, especially synthetic small blood vessel is significant in the surgery.Mention in " weaving polyester artificial vascular " literary composition, the primary structure of machine made synthetic small blood vessel is plain weave, twill or satin weave three major types.Shortcomings such as but the little blood vessel of these structures exists the oozing of blood amount big in clinical practice, and easily decoherence in the fracture edge and the blood flow patency rate is undesirable, the following little blood vessel of diameter 1mm is all the more so.For example, diameter is the synthetic small blood vessel patency rate only 75% of 0.8mm, and the synthetic small blood vessel of diameter below φ 0.6mm do not appear in the newspapers so far.

This utility model purpose is the structural pipe wall that changes synthetic small blood vessel, is not decoherenced in synthetic small blood vessel fracture edge, and blood vessel wall oozing of blood amount is little, and compliance is good and higher blood flow patency rate arranged.

The technical scheme that realizes above-mentioned purpose is to adopt reeled yarn to add the comprehensive structural pipe wall that plain weave or reeled yarn add twill.Promptly the difference according to blood vessel diameter is pressed from both sides with different plain weaves or twill structure between the reeled yarn of two bursts of twistings.The warp number of folded plain weave or twill is between 1～3 between two strands of reeled yarns that this utility model adopts.

The method of typing is to insert the pole of the diameter match in pipe, behind the boiling water heat treatment, and cooling, drying again.

The utility model has the advantages that at the incision position of the optional position of synthetic small blood vessel and do not decoherence that blood vessel wall oozing of blood amount is 40～82.5ml/cmminmmHG, inner wall smooth, have the fluffy structure of micropore, blood flow is unobstructed, and compliance is good, can twist arbitrarily, and not flat, do not subside; Sterilization treatment and stitching before easy to use.

This utility model has following accompanying drawing:

The little vascular tissue of Fig. 1 φ 0.6mm structural representation,

The little vascular tissue of Fig. 2 φ 2mm structural representation,

The little vascular tissue of Fig. 3 φ 4mm structural representation.

Embodiment:

Little blood vessel described in the utility model is meant that diameter is the synthetic small blood vessel of φ 0.6～5mm.The material selection of little blood vessel helps cell tissue growth, to human body have no side effect 72 The pure terylene of danier (den-ier) is as warp, and 42 The pure terylene of danier (denier) is as parallel.Material also can be selected medical ptfe or polyurethane silk material for use.The organizational structure of little blood vessel is divided into basic organizational structure and aid in tissue structure, and basic organizational structure is a reeled yarn, and the aid in tissue structure is twill or plain weave structure.The reeled yarn structure has solved the problem of decoherencing, and supplementary structure has then played the inhibition oozing of blood, strengthens the effects such as body bone of blood vessel.Difference according to external caliber between the reeled yarn 1 of two bursts of twistings is pressed from both sides with different plain weave 2 or twill 3 structures.The scheme of the present invention design is: folded plain weave 2 or twill 3 warp numbers are between 1～3 between two strands of reeled yarns 1.Shown in Figure 1 is that diameter is the organizational structure sketch map of the little blood vessel of 0.6mm, and folded plain weave 2 warp numbers are 2 between two strands of reeled yarns 1.Shown in Figure 2 is that diameter is the organizational structure sketch map of the little blood vessel of 2mm, and folded twill 3 radial line numbers are 3 between two strands of reeled yarns 1.Shown in Figure 3 is that diameter is the organizational structure sketch map of the little blood vessel of 4mm, and folded twill 3 warp numbers are 3 between two strands of reeled yarns 1.

The manufacture method of machine made synthetic small blood vessel, generally comprise pipe weave, pure white, make stricture of vagina typing and all operations of sterilizing.In the existing manufacturing process, the method for making stricture of vagina typing is that artificial blood vessel is placed in the thermal finalization processing of making stricture of vagina and 270 on the corresponding model of size.This utility model will be made the method for stricture of vagina typing and do improvement, weave and through inserting the metal bar or the non-metallic rods of the diameter that matches in the pipe of pure white processing heat treatment more than 10 minutes in boiling water, cooling then, drying.After handling like this, can make the synthetic small blood vessel inner wall smooth, the raw material ultimate fibre is fluffy, is beneficial to the growth of the unobstructed and cell tissue of blood flow.

The zoopery result of this utility model synthetic small blood vessel is as follows.

Zoopery 1:

Synthetic small blood vessel with the diameter 0.6mm that sterilizes is sewn in rat femoral artery lower end.Excision femoral artery 15mm sews up with the long φ 0.6mm of 15mm synthetic small blood vessel, and the not damaged nylon wire of use 0/11 is made interrupted suture, stitches six pins altogether.Unclamp vascular clamp then, seeing that vessel outer wall is little has an oozing of blood.Pressed 3～5 minutes with saline gauze is light, remove saline gauze, oozing of blood stops fully.

Zoopery 2:

With diameter is that 3～4mm, length are the sterilization synthetic small blood vessel of 30～50mm, transplant artery and vein on the common carotid artery of pig and mesentery, make interrupted suture with 0/5 not damaged polypropylene synthetic fibers, every end seam 12～14 pins, use gauze pressing, behind the loose ends vascular clamp oozing of blood is arranged, but amount is few, i.e. hemostasis fully after about 5～10 minutes.

Art is opened otch one day after, and separate tissue is easy, and not seeing has adhesion, and the synthetic small blood vessel outer surface is clear, and incision position is not decoherenced.Postoperative was opened otch in five days, and tissue has adhesion, and the synthetic small blood vessel outer surface has the fibrous tissue calmness, but adhesion is insecure, easily peels off, and can peel off clean.Postoperative was opened otch in 15 days, and the tissue adhesion is more firm, and the synthetic small blood vessel outer surface has the thicker connective tissue of one deck to cover, and was stringer and arranged, be with peeling off than great strength, can not peel off thoroughly 1～5 day but do not resemble postoperative.Postoperative was opened otch in 30 days, and the tissue adhesion is more firm, and it is difficult to peel off, and adventitial tissue is thicker, and has neonatal blood vessels to nourish.

In addition, make tremulous pulse lower end replacement with 67 rabbit, the synthetic small blood vessel internal diameter is 0.6～0.8mm, unclamps vascular clamp after the stitching, and seeing has oozing of blood, but amount is few.With the light repoussage section of warm saline gauze synthetic small blood vessel after 3～5 minutes oozing of blood promptly end.Postoperative proves that through Doppler test and angiography the synthetic small blood vessel of transplanting is unimpeded fully until more than 3 months, and patency rate reaches 100%.

The clinical practice result of this utility model synthetic small blood vessel is as follows.With the diameter of sterilization is that 1.6～2.2mm, length are that the synthetic small blood vessel of 180～240mm is transplanted in artery and vein behind the human body shin (from the internal malleolus more than the 50mm), and row reproduces artery and vein art behind the shin.Carry out interrupted suture with 0/9 not damaged polypropylene synthetic fibers, stitch 10 pins altogether, external bulk saline gauze covers, after unclamping the both sides vascular clamp oozing of blood is arranged, after 5～10 minutes, loosen binder with the binder pressure dressing, remove gauze, synthetic small blood vessel stops oozing of blood fully, press...withes one's finger to touch synthetic small blood vessel, and finger tip has the arterial pulse innervation.If reproduce posterior tibial veins then after sewing up 1～5 hour with 2 milliliters of syringes, syringe needle is inserted synthetic small blood vessel, all can extract venous blood out, show that blood flow is unobstructed.Now 34 routine patients' therapeutic outcome is listed in table 1.

With the sterilization 63 synthetic small blood vessels (internal diameter is that 0.6～4mm) tremulous pulse or the vein that is applied to 43 routine human bodies all obtained comparatively ideal effect, and the blood flow patency rate is 100%.Patient's postoperative can normally be participated in housework or physical work.

This utility model synthetic small blood vessel operating position in the operation of flap burns unit is as follows:

Medical record number 230122, man, 22 years old, workman, two forearm hot crush injurys.The inboard flap free transplanting operation of capable right leg on August 11st, 1987, flap area 10 * 16cm.The synthetic small blood vessel bridge joint.Near-end right radial artery and two accompanying veins, posterior tibial artery and two accompanying veins of the inboard free skin flap of far-end right leg.Synthetic small blood vessel: 1 φ 2.2 * 30 of tremulous pulse; 2 φ 2.2 * 30 of vein; Postoperative so far, artery and vein is all unimpeded.All the other cases differ and one enumerate.

Table 1. synthetic small blood vessel reproduces artery and vein patient chart behind the shin

Claims (1)

1, a kind of machine made synthetic small blood vessel is characterized in that tube wall by being that the mixed texture of aid in tissue structure forms with reeled yarn 1 for main organizational structure with plain weave 2 or twill 3, accompanies 1 to 3 plain weave 2 or twill 3 warps between per two strands of reeled yarns 1.

Images