CN105361984A - Braiding method of medical titanium alloy bent wire endo-stent - Google Patents

Abstract

A braiding method of a medical titanium alloy bent wire endo-stent comprises diamond braiding, regular braiding and Hercules braiding of superfine threads, an interlacing structural rate range and a braiding angle range are determined, medium flexibility, radial annular strength and least size reduction can be provided. The method is suitable for the braiding of endo-stents of medical titanium alloy superfine bent wires 0.2 mm to 0.5 mm in diameter.

Description

A kind of medical titanium alloy bending silk inner support preparation method

Technical field

The present invention is a kind of medical titanium alloy bending silk inner support preparation method.

Background technology

Medical tube intracavity stent a kind ofly enters predetermined position, luminal stenosis place by tiny pipeline, can be expanded to the bore of setting after release, produces and continue and uniform support force, thus keep the tubular medical equipment that tube chamber is unobstructed to human body tube wall.At present, along with the development of various interventional therapeutic technique, the development of various endoluminal stent also result in people and more and more payes attention to, and being applied to clinical has the inner supports such as urethra, biliary tract, esophagus, trachea and blood vessel.

The present invention seeks to the sinusoidal style becoming to repeat by bending ultrafine wire, twist up ring, stitching, squeezing or welded together.Change sinusoidal geometry, the quantity of repetitive, the physical dimension of silk, connected mode between ring and ring can change the performance of support, and this kind of support provides medium pliability, radial loop intensity and minimum size to shorten usually.Be applicable to the establishment of diameter 0.2mm-0.5mm medical titanium alloy ultra-fine wire bending silk inner support.

Summary of the invention

Invention medical titanium alloy establishment silk inner support preparation method carries out rhombus establishment, rule establishment and He Gelisi establishment with ultrafine wire respectively.Rhombus establishment also known as 1/1 pilotaxitic texture, namely an one thread continuously alternately from the one thread another yarn group below by, and then pass through above the one thread another yarn group again.Rule establishment is also known as 2/2 pilotaxitic texture, and namely an one thread passes through continuously above two one threads another yarn group, so alternately interweaves.He Gelisi establishment also known as 3/3 pilotaxitic texture, namely an one thread continuously from three one threads another yarn group below by, alternately interweave.From the viewpoint of number of spindle unit, programming structure, basketry angle and internal diameter four during establishment, and parameter is on the impact of catheter surface performance, wherein basketry angle refers in compilation process, takes the angle that yarn device is formed to the yarn worked out between point and fabric traction direction.

Invention medical titanium alloy bending silk inner support preparation method is that establishment pitch increases along with the increase of number of spindle unit, but increasing degree and programming structure have close contacting, and the increasing degree of diamond structure is less; On the establishment machine of identical number of spindle unit, maximum according to its establishment pitch of regular texture, secondly be reinforced structure, regular texture differs very little with the establishment pitch of reinforced structure, the basic organization of selected reinforced structure is rule establishment, its reason diminished is that the thickness adding the interface point place making yarn of muscle line becomes large, and the appearance of this 3-D effect makes establishment pitch relatively reduce.Basketry angle and the impact of catheter diameter on establishment pitch are very regular, and along with the increase of catheter diameter, establishment pitch increases thereupon; And when basketry angle becomes large, establishment pitch but reduces gradually.

Invention medical titanium alloy bending silk inner support preparation method is in basketry angle one timing, along with the increase of number of spindle unit, establishment is contended decrescence little, namely work out angle and depart from the degree change at basketry angle greatly, establishment machine number of spindle unit is more, and model and the size of machine are larger, the path that machine cycles is passed by for one week becomes large, namely corresponding fraction time increases, and the Rubbing number intersected between yarn with yarn in addition increases, and the conduit establishment angle developed and the departure degree at basketry angle increase.In programming structure, regular texture and reinforced structure difference are not very large, but diamond structure is then relatively large.Along with the increase at basketry angle, it is large that gradual change is contended in establishment, and it is very even to become large trend, and when internal diameter becomes large, establishment angle also becomes greatly thereupon.

Invention medical titanium alloy bending silk inner support preparation method keeps other technological parameter constant, along with the increase of number of spindle unit, conduit thickness increases, because number of spindle unit increases, the yarn radical participating in establishment increases, and when basketry angle is constant, the yarn had in unit length increases, namely density becomes large, and its thickness is corresponding increase also; The thickness of reinforced structure is in maximum all the time, this is because adding of muscle line makes conduit thickness obviously increase, it is large that the Thickness Ratio rhombus that rule is worked out is worked out.When basketry angle is increased to 70 degree from 60 degree, the thickness of conduit first reduces rear increase, 65 degree time, the thickness of conduit is minimum, this is relevant to the pore shape of conduit, and the conduit that establishment machine is formed has the hole of tetragon, when working out angle change, hole tetragon also respective change, thus cause the change of thickness.

Detailed description of the invention

Embodiment 1: working out 1/1 pilotaxitic texture method with rhombus and carry out ultrafine wire establishment, take internal diameter as 4mm, basketry angle is the conduit of 60 degree is example.Technological parameter: 1/1 pilotaxitic texture ratio is 1.05/1.0, establishment pitch is increased to 60 along with number of spindle unit 30, but increasing degree and programming structure have close contacting, increasing to by 11.3cm to 25.4cm of diamond structure.Establishment is highly 11.3cm, and the conduit establishment angle developed and the departure degree at basketry angle increase to 72 degree, and along with the increase of catheter diameter, establishment pitch increases to 25.4cm thereupon.

Embodiment 2: carry out ultrafine wire establishment by rule establishment 2/2 pilotaxitic texture method, take internal diameter as 4mm, basketry angle is the conduit of 60 degree is example.Technological parameter: 2/2 pilotaxitic texture ratio is 2.08/2.0, establishment pitch is increased to 80 along with number of spindle unit 40, but increasing degree and programming structure have close contacting, increasing to by 21.3cm to 47.4cm of diamond structure.Establishment is highly 21.3cm, and the conduit establishment angle developed and the departure degree at basketry angle increase to 92 degree, and along with the increase of catheter diameter, establishment pitch increases to 47.4cm thereupon.

Claims (2)

1. a medical titanium alloy bending silk inner support preparation method, is characterized in that: carry out rhombus establishment, rule establishment and He Gelisi establishment with ultrafine wire respectively, be applicable to the establishment of diameter 0.2mm-0.5mm medical titanium alloy ultra-fine wire bending silk inner support; 1/1 pilotaxitic texture ratio ranges is (0.95-1.20)/(1.0-1.20), and 2/2 pilotaxitic texture ratio ranges is (1.85-2.40)/(2.0-2.20), and 3/3 pilotaxitic texture ratio ranges is (2.50-3.50)/(3.0-3.50).

2. a medical titanium alloy bending silk inner support preparation method, is characterized in that: 1/1 pilotaxitic texture establishment angle range 30-150 degree, 2/2 pilotaxitic texture establishment angle range 60-120 degree, 3/3 pilotaxitic texture establishment 90 degree, angle.