CN100364489C

CN100364489C - Machine knitting artificial pleat-free blood vessel and its making method

Info

Publication number: CN100364489C
Application number: CNB031128726A
Authority: CN
Inventors: 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: 2008-01-30
Anticipated expiration: 2023-02-21
Also published as: CN1522676A

Abstract

The present invention relates to an artificial blood vessel and a manufacturing method thereof, which belongs to the field of a medical artificial organ. The present invention has the main technical scheme that yarn rings which are formed by the selection of warp yarns in a yarn selection mode at intervals are arranged at the outer wall of a tube blank. The yarn rings are arranged at the outer wall of the tube blank in a screw or network shape. Elastic bands penetrate the yarn rings, and are positioned at the outer wall of the tube blank by the yarn rings. The bending strength and the compressive strength of the artificial blood vessel of the present invention can be enhanced.

Description

Pleat-free 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

Merely as shown in Figure 1 by the woven artificial blood vessel of fibrous various multi-form or structures, the common fault of this blood vessel is: all undesirable at aspects such as resistance to compression, rupture strengths by fibrous tube wall, it is crooked frequent to satisfy human body shoulder, elbow, wrist, knee joint etc., the joint part that angle of bend is big, and the back of the hand, instep etc. near epidermis, bear the needs of the bigger position vascular reconstructive surgery of external pressure; In addition, the groove 1 of this blood vessel 2 will directly have influence on the flow direction of 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 objective of the invention is to design a kind of pleat-free woven blood vessel and manufacture method thereof,, reduce the formation of thrombosis simultaneously to improve anti-folding, the comprcssive strength of artificial blood vessel.

Its main technical schemes is that the blood vessel pipe is formed by warp and weft interweaving, it is characterized in that at the flexible band of the outer surface of blood vessel pipe.

Have choosing the circle of yarn one by one that the yarn mode is chosen the warp thread compartment of terrain at the outer wall of pipe, the yarn circle is with helical form or the network-like outer wall that is arranged in pipe, and elastic webbing penetrates one by one in the yarn circle, is positioned at the outer wall of pipe by the yarn delineation.

The inner wall smooth of pipe is smooth.

Pleat-free woven blood vessel's manufacture method, it is characterized in that becoming the blood vessel pipe with plain weave or satin weave or twill weave, simultaneously to choose the yarn mode, the part warp thread is chosen yarn circle one by one by appointed interval, a series of yarn circle is with helical form or the network-like outer wall that is arranged in pipe, form an alternate hollow screwed pipe that is wound in the pipe outer wall, elastic webbing is penetrated in this hollow screwed pipe again.

Advantage of the present invention is owing to the outer wall at pipe is provided with a helical form or network-like elastic webbing, brings the support that forms the pipe outer wall by this elasticity, thereby has improved the resistance to compression and the rupture strength of artificial blood vessel's wall significantly.This blood vessel is specially adapted to human synovial position and close epidermis, bears the needs of the vascular reconstructive surgery at external force pressure position.Simultaneously, because being wound in the elastic webbing of pipe outer wall, utilization of the present invention constitutes tubular support, compare with original technology, the blood vessel of making is smooth smooth, thereby, during blood flow, can be as original artificial blood vessel, groove at the pipe inwall forms eddy current, thereby has reduced thrombosed possibility.

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 blood vessel structure figure of the present invention.

Fig. 4 is pipe fabric figure.

Fig. 5 is the pipe weave diagram.

The specific embodiment

As shown in the figure: blood vessel pipe 5 is formed by warp and weft interweaving, be with 3 in that the outer surface of blood vessel pipe 5 is flexible, the material of elastic webbing can be macromolecular material or memorial alloy, shape can be spiral or network shape, and the intensity of material can or be rolled over intensity and select according to the pressurized of different blood vessel.When adopting network shape memory alloy wire to support, can satisfy the needs of intervene operation; The order that interweaves through weft yarn is determined by water percolating capacity.

Outer wall at pipe 5 has to choose the yarn mode, the circle of yarn one by one 4 that warp thread is chosen at interval, yarn circle 4 is with helical form or the network-like outer wall that is arranged in pipe 5, elastic webbing 3 penetrates one by one in the yarn circle 4, be positioned the outer wall of pipe 5 by yarn circle 4, form outer wall and support is arranged, the woven blood vessel that inwall is smooth.

This pleat-free woven blood vessel's manufacture method is: become blood vessel pipe 5 with plain weave or satin weave or twill weave, simultaneously to choose the yarn mode, the part warp thread is chosen yarn circle 4 one by one by appointed interval, a series of yarn circle 4 is with helical form or the network-like outer wall that is arranged in pipe 5, form an alternate hollow screwed pipe that is wound in pipe 5 outer walls, again elastic webbing 3 is penetrated in this hollow screwed pipe.

Fig. 4,5 is used for workman's reference when braiding, and wherein Fig. 4 is the plane graph of fabric, and Fig. 5 is weaving figure.

Claims

1. pleat-free woven blood vessel, blood vessel pipe (5) is formed by warp and weft interweaving, it is characterized in that the flexible band of outer surface (3) at blood vessel pipe (5); Outer wall at pipe (5) has to choose the circle of yarn one by one (4) that the yarn mode is chosen warp thread at interval, yarn circle (4) is with helical form or the network-like outer wall that is arranged in pipe (5), elastic webbing (3) penetrates one by one in the yarn circle (4), is positioned the outer wall of pipe (5) by yarn circle (4).

2. artificial blood vessel according to claim 1 is characterized in that the inner wall smooth of pipe (5) is smooth.

3. pleat-free woven blood vessel's manufacture method, it is characterized in that becoming blood vessel pipe (5) with plain weave or satin weave or twill weave, simultaneously to choose the yarn mode, the part warp thread is chosen yarn circle (4) one by one by appointed interval, a series of yarn circle (4) is with helical form or the network-like outer wall that is arranged in pipe (5), form an alternate hollow screwed pipe that is wound in pipe (5) outer wall, again elastic webbing (3) is penetrated in this hollow screwed pipe.