CN1522675A

CN1522675A - Machine knitting artificial blood vessel without pleat in the internal wall, and its making method

Info

Publication number: CN1522675A
Application number: CNA031128718A
Authority: CN
Inventors: 峰华; 华峰; 林增华; 华卫国
Original assignee: WUXI LAIFULUN BIOLOGICAL MATERIAL CO Ltd
Current assignee: WUXI LAIFULUN BIOLOGICAL MATERIAL CO Ltd
Priority date: 2003-02-21
Filing date: 2003-02-21
Publication date: 2004-08-25
Anticipated expiration: 2023-02-21
Also published as: CN100345527C

Abstract

The present invention relates to an artificial blood vessel and its production method. Its main technical scheme lies in that said invention uses plain weave and reeled yarn as basic tissue, and adds the warp floated long yarn according to a certain space to make them be formed into the tissue structure of vessel blank together. It is characterized by that the space between weft yarns of the vessel blank can be compressed and eliminated so as to form smooth inner wall of the blood vessel, and the warp-floated long yarn between warp yarns can be crowned so as to form the gofer on out wall of blood vessel. Because the inner wall of said artificial blood vessel has no gofer, it can avoid the eddy flow when the blood flows so as to reduce possibility of thrombus.

Description

Inwall aptychus type woven blood vessel and manufacture method thereof

Technical field

The present invention relates to the medical artificial organ field, refer in particular to the manufacture method of a kind of artificial blood vessel and this artificial blood vessel.

Background technology

For making the woven blood vessel can be crooked, people will be woven into usually straight pipe fabric through winding, typing moves back to separate etc. and makes stricture of vagina technology, make the artificial blood vessel inwall and the outer wall of finished product all form gauffer, its vertical profile is met personally Fig. 1, and this blood vessel is referred to as it former blood vessel in this article.

The outstanding problem of former blood vessel is the flow direction that the groove 1 of blood vessel 2 directly has influence on blood.General principle of hydrodynamics shows: mobile blood turns to generation at groove, can cause the appearance of eddy current, and as shown in Figure 2, this eddy current is one of three big reasons that cause thrombosis, can directly have influence on artificial blood vessel's at a specified future date unobstructed effect.

Summary of the invention

The object of the present invention is to provide a kind of inwall aptychus type woven blood vessel and manufacture method thereof,, produce the phenomenon of eddy current when having avoided blood flow, reduced thrombosed possibility because the inwall of this artificial blood vessel is non-wrinkled.

The measure of taking is as follows for achieving the above object: with plain weave or twill and reeled yarn is fundamental tissue, it is characterized in that between the warp thread that constitutes fundamental tissue, being aided with the floating long yarn of warp of certain intervals, the common organizational structure of forming the blood vessel pipe, eliminate because of compression at interval between the pipe weft yarn, form slick blood vessel, the floating long yarn of warp in the pipe warp thread then arches upward because of compression forms, and constitutes the gauffer of vessel outer wall.

Another feature of the present invention is between per two strands of reeled yarns many plain weaves or twill warp thread to be arranged, and at least 1 floating long yarn of warp.

This inwall aptychus type woven blood vessel's manufacture method is: a, braiding: with plain weave or twill and reeled yarn is fundamental tissue, is aided with the floating long yarn of warp of certain intervals again, forms the organizational structure of pipe jointly; B, pressurization then: pipe is inserted on the associated plug, by the joint pressurization, makes the interval between the pipe weft yarn be compressed and eliminate, then arched upward through floating long yarn along the pipe warp thread direction.

After pressurization, carry out c, thermal finalization again: heat treatment is 8～12 minutes in boiling water; And then carry out d, cooling: at the cooling chamber internal cooling to room temperature; Carry out e, drying again: in hothouse, dry in 30 ℃～50 ℃ the hot blast.

Advantage of the present invention is to compare with former blood vessel, owing to adopted elder generation and then unique manufacturing process, the blood vessel of production is non-wrinkled, during blood flow, no longer produce bending and eddy current, thereby the problems such as thrombosis of having avoided artificial blood vessel to have gauffer to cause easily because of inwall.Secondly, in the prior art, for forming gauffer at tube wall, must utilize two parallel, twining apart from corresponding to line of its diameter and blood vessel gauffer is wrapped in vessel outer wall, the reheat typing, the blood vessel of making all has gauffer at the surfaces externally and internally of tube wall, and blood forms eddy current easily at the inboard wall groove place, brought out the formation of thrombosis; The present invention is owing to be aided with the floating long yarn of certain warp in fundamental tissue, when thermal finalization, earlier pipe is enclosed within on the plug by the joint compression, gap between weft yarn is eliminated because of compression, then form outside arching upward through floating long yarn because of compression, constitute the gauffer of vessel outer wall, therefore utilize method of the present invention, can produce inner wall smooth, the crisp artificial blood vessel of outer wall.

Description of drawings

Fig. 1 is original blood vessel structure figure.

When being blood flow, Fig. 2 in gauffer, forms the state diagram of eddy current.

Fig. 3 is the sketch map that weft yarn of the present invention and warp float long yarn.

Fig. 4 for compression after the state diagram of floating long yarn when arching upward.

Fig. 5 is blood vessel structure figure of the present invention.

Fig. 6 is the floating long knot composition of warp thread of the present invention, weft yarn and warp.

Fig. 7 is a weave diagram.

The specific embodiment

The present invention is applicable to the woven blood vessel of 8 millimeters of 0.8 millimeter～Φ of Φ, and its organizational structure is fundamental tissue and aid in tissue two parts, and fundamental tissue is that plain weave or twill add reeled yarn 10.Wherein plain weave or twill are formed by warp thread 6 and weft yarn 4 braidings, constitute the fundamental tissue of tube wall; Reeled yarn 10 plays the effect that the pipe end suture is decoherenced that suppresses; Aid in tissue is through floating long yarn 5, is used to form the gauffer outer wall.Material therefor is: fundamental tissue can utilize natural or synthetic fibers; Aid in tissue can be utilized polyster fibre, and this polyster fibre can deform under specified temperature, and is fixed as the outer gauffer 9 of tube wall.The order that interweaves through weft yarn is determined by water percolating capacity.

During braiding, 2～3 or many plain weave warp thread 6 are arranged between per two strands of reeled yarns 10, and at least 1 floating long yarn 5 of warp.Utilize plain weave and reeled yarn 10 as fundamental tissue, be aided with the floating long yarn of warp of certain intervals again, form the organizational structure of blood vessel pipe jointly.Wherein eliminate because of compression at the interval of 4 of pipe weft yarns, forms slick blood vessel 8, and 5 on the floating long yarn of the warp in the pipe warp thread 6 arches upward 7, the gauffer 9 of formation vessel outer wall because of compression forms.

This inwall aptychus type woven blood vessel's manufacture method is:

A, braiding: with plain weave or twill and reeled yarn 10 is fundamental tissue, is aided with the floating long yarn 5 of warp of certain intervals again, forms the organizational structure of pipe jointly;

B, pressurization: pipe is inserted on the associated plug, by the joint pressurization, makes the interval of 4 of pipe weft yarns be compressed and eliminate, arched upward through floating 5 on long yarn along the pipe warp thread direction;

C, thermal finalization: heat treatment is 8～12 minutes in boiling water;

D, cooling: at the cooling chamber internal cooling to room temperature;

E, drying: in hothouse, dry in 30 ℃～50 ℃ the hot blast.

Claims

1, inwall aptychus type woven blood vessel, with plain weave or twill and reeled yarn (10) is fundamental tissue, it is characterized in that between the warp thread (6) that constitutes fundamental tissue, being aided with the floating long yarn (5) of warp of certain intervals, the common organizational structure of forming the blood vessel pipe, eliminate because of compression at interval between pipe weft yarn (4), form slick blood vessel (8), the floating long yarn (5) of the warp in the pipe warp thread (6) then arches upward because of compression forms (7), constitutes the gauffer (9) of vessel outer wall.

2, artificial blood vessel according to claim 1 is characterized in that many plain weaves or twill warp thread (6) are arranged between per two strands of reeled yarns (10), and at least 1 floating long yarn (5) of warp.

3, a kind of inwall aptychus type woven blood vessel's manufacture method is characterized in that a, braiding: with plain weave or twill and reeled yarn (10) is fundamental tissue, is aided with the floating long yarn (5) of warp of certain intervals again, forms the organizational structure of pipe jointly; B, pressurization then: pipe is inserted on the associated plug, by the joint pressurization, makes the interval between pipe weft yarn (4) be compressed and eliminate, then arched upward through floating long yarn (5) along the pipe warp thread direction.

4, method according to claim 3 is characterized in that after pressurization, carries out c, thermal finalization again: heat treatment is 8～12 minutes in boiling water; And then carry out d, cooling: at the cooling chamber internal cooling to room temperature; Carry out e, drying again: in hothouse, dry in 30 ℃～50 ℃ the hot blast.