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High shrinkage intravascular stent delivery system

A vascular stent and delivery system technology, applied in the direction of the stent, can solve problems such as inability to position, large axial retraction, and failure to meet surgical requirements, achieving reliable placement and counteracting the effect of axial shortening

Active Publication Date: 2015-07-01
SUZHOU INNOMED MEDICAL DEVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the high retractability of most self-expanding stents, the axial retraction is large, and such a delivery system with high retractability cannot be positioned well, that is, it cannot meet the surgical requirements.

Method used

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  • High shrinkage intravascular stent delivery system
  • High shrinkage intravascular stent delivery system
  • High shrinkage intravascular stent delivery system

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Embodiment Construction

[0023] The invention discloses a delivery system for a blood vessel stent with high axial retractability. Such as figure 2 As shown, the axially highly retractable vascular stent is made of nickel-titanium alloy wire, including a cylindrical body and convoluted rounded corners arranged at both ends of the body. The body is passed through by the nickel-titanium alloy wire The positive rotation and anti-rotation are interlaced and stacked, and the body is formed by a group of rhombus grid units. The overlapping nodes of the rhombic grid cells of such vascular stents have no firm constraints, and this lack of firm constraints allows the nitinol wires to rotate and twist rather than enter a circular displacement. As a result, it prevents the localized high bending strains around nodes typical in laser-cut stents. This mechanism is common to the same mesh stents, but the closed-end loops and low intersection angle, as well as the use of nickel-titanium alloy wires make the new s...

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Abstract

The invention provides a high shrinkage intravascular stent delivery system, whichcomprises a conduit component and a control component, wherein the conduit component comprises an outer tube, a middle-layer tube and an inner tube; an intravascular stent and a check block are arranged in the outer tube; the control component comprises a body and a screw rotationally arranged in the body; the screw is provided with a left-hand thread and a right-hand thread in opposite spiral directions at intervals; and the screw is rotated to make the outer tube move to a near end, and the middle-layer tube pushes the check block and the intravascular stent to move to a far end. The invention has the advantages that a three-layer conduit structure is adopted, the relative movement of the middle-layer tube and the outer tube can effectively offset the axial shrinkage of the intravascular stent, and the intravascular stent can be easily and reliably arranged at an expected position.

Description

technical field [0001] The invention relates to the technical field of minimally invasive medical devices, in particular to a delivery system for a vascular stent. Background technique [0002] Compared with traditional peripheral vascular surgery, minimally invasive interventional surgery using stent therapy has less trauma, fewer complications, and better results. It has become the main method for the treatment of peripheral vascular stenosis. [0003] Such as figure 1 As shown, the delivery system needs to be used when the vascular stent is implanted in the body. The existing delivery system, as shown in Chinese patent application CN201110190183.4, generally adopts a hollow inner tube and an outer tube that are nested with each other. The hollow part of the inner tube is convenient for the passage of the guide wire during the operation. between the outer tubes. During the operation, the guide wire guides the catheter assembly of the delivery system to the surgical site...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/966
Inventor 龚霄雁周卫昆
Owner SUZHOU INNOMED MEDICAL DEVICE
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