Method for manufacturing artificial blood vessel

Abstract

The invention discloses a method for manufacturing an artificial blood vessel. The artificial blood vessel is a cylindrical main blood vessel. The method is characterized in that the artificial blood vessel is knitted on a warp knitting machine with double needle beds, the warp knitting machine with the double needle beds is provided with at least four ground guide bars and at least twelve pattern guide bars, two pattern guide bar operating lines are arranged between each two adjacent ground guide bars, and each operating line comprises two pattern guide bars; warp yarns are strung and sleeved together by means of looping knitting actions among looping elements, the ground guide bars and the pattern guide bars, so that two netted platy fabrics comprising loops are formed on the two needle beds of the warp knitting machine; owing to looping knitting actions among the looping elements and the pattern guide bars and swinging actions of the guide bars, and the warp yarns are alternately looped on the two needle beds of the warp knitting machine, so that the two netted platy fabrics are connected with each other to form a fabric of the cylindrical main blood vessel. The method has the advantages that the artificial blood vessel which is knitted by the method has functions of promoting cell tissue ingrowth and preventing blood from permeating from the wall of the vessel during surgery, and the method can be used for knitting various blood vessel structures.

Description

technical field [0001] The present invention relates to an artificial blood vessel which can be used in human body or animal body, especially relates to the production method of artificial blood vessel. Background technique [0002] In the 1950s, the history of manufacturing textile-type artificial blood vessels began after the phenomenon of cells growing on silk soaked in blood was observed. Since then, the selection of suitable fiber materials and ideal fabric structures has become the focus of artificial blood vessel research. Today, textile artificial blood vessels have been widely used in clinics to replace damaged blood vessels in the human body, and have achieved good clinical results. An ideal artificial blood vessel wall should have pores of appropriate size, which is not only conducive to the growth of cells and tissues, but also cannot cause a large amount of bleeding during the operation due to the existence of pores. The existing textile-type artificial blood ...

AI Technical Summary

Problems solved by technology

The existing textile-type artificial blood vessels generally adopt the manufacturing method of circular machine knitting, and the vessel wall is a single-layer structure. In order to avoid bleeding from the vessel wall, the method of circular knitting is to increase the tightness of the textile structure of the vessel wall, which is not conducive to Ingrowth of human cell tissue after surgery

Although the woven artificial vascular fabric has the advantages of compact tissue, high strength, low porosity, and no need for pre-coagulation, it has poor compliance, easy to loose edges, and unsatisfactory healing effect

The disadvantages of weft-knitted artificial vascular fabrics are that they are easy to curl, longitudinally and transversely easy to delaminate, poor elastic recovery, and slow radial and longitudinal creep after implantation into the human body.

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