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Medical guide wire

A guide wire and metal core technology, applied in the field of medical instruments, can solve the problems of self-expanding stents being unable to stick to the inner wall of the lumen, self-expanding stents being damaged, and self-expanding stents being unable to be recovered and repositioned.

Active Publication Date: 2013-01-23
MICROPORT NEUROTECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-density, ultra-soft self-expanding stents, if the existing delivery guide wire is used, the self-expanding stent will be damaged or deformed during delivery due to the excessive delivery resistance, so that the implanted self-expanding stent cannot be tightened tightly. Close to the inner wall of the human body
Moreover, the existing delivery guide wire can only push and release the self-expanding stent during delivery, but cannot recover and reposition the self-expanding stent

Method used

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  • Medical guide wire
  • Medical guide wire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] figure 1 It is a schematic structural diagram of a medical guide wire provided in Example 1 of the present application.

[0058]As shown in the figure, the medical guide wire includes: a metal core 1, a boss 2 and a delivery positioning member 3 for delivering a self-expandable stent (not shown in the figure). The metal core 1 is divided into three parts: the front segment 4, the middle segment 5 and the distal segment 6. When the self-expandable stent is delivered, the position of the middle segment 5 is 7, and the front end of position 7 is close to the front segment 4. Multiple The delivery positioning members 3 are evenly spaced and welded or bonded to the position 7 of the middle section to provide thrust or recovery force for the self-expandable stent during delivery. The boss 2 is welded or bonded at the end of the position 7 to provide thrust for the self-expandable stent during delivery.

[0059] figure 2 Schematic diagram of the structure of the metal core...

Embodiment 2

[0070] Figure 5 It is a structural schematic diagram of a medical guide wire provided by Embodiment 2 of the present invention. As shown in the figure, the medical guide wire also includes: a first spring 9 and a second spring 10, wherein: the first spring 9 is wound on the metal core 1 On the front part 4; the second spring 10 is wound on the middle part 5 of the metal core 1. The functions of the first spring 9 and the second spring 10 are: on the one hand, to prevent the metal core from being too bent and broken when it passes through tortuous vascular lesions during the operation; on the other hand, to prevent the metal core 1 from piercing the human body during the delivery process The inner wall of the lumen ensures the safety of the operation. Because the stiffness of the front section 4 and the middle section 5 is different, the diameter of the first spring 9 is smaller than the diameter of the second spring 10 to ensure the stiffness difference between the front sec...

Embodiment 3

[0073] Image 6 It is a schematic diagram of the structure of a medical guide wire provided by Embodiment 3 of the present invention. As shown in the figure, the materials of the delivery positioning part 3 and the boss 2 of the medical guide wire can also be selected from titanium, platinum, gold, tungsten or developing For materials such as high molecular polymers that are developed under X-ray irradiation, the material of the first spring 9 can also be selected from developing materials such as titanium, platinum, gold or tungsten. With the above-mentioned design of the developing material, when delivering the self-expanding stent, the doctor can easily identify the position of the self-expanding stent according to the position of the developing material by using X-ray irradiation. When the position of the self-expanding stent is not ideal, the The corresponding adjustment of the medical guide wire can reposition the self-expandable stent, so that the released self-expandab...

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Abstract

The invention discloses a medical guide wire comprising a metal core, one or more of conveying locating elements and a boss, wherein the metal core is divided into three sections of a tail section part, a middle section part and a front section part, and three sections are successively in linear structure, echelonment structure and the linear structure; the conveying locating elements are fixed on the middle section part of the metal core for providing thrust or recovery force for a self-expandable bracket during transmission; and the boss is fixed on the middle section part of the metal core behind the conveying locating elements for providing thrust for the self-expandable bracket during transmission. In the medical guide wire disclosed by the invention, the metal core is provided with the plurality of conveying locating elements; and the conveying locating elements are rubbed or embedded into the wave rod gap of the self-expandable bracket to provide enough thrust or recovery force by sections, thereby solving the problem that the self-expandable bracket is damaged or deformed when the existing conveying guide wire is used for conveying high-density and super soft self-expandable bracket, and solving the problem that the self-expandable bracket can not be recovered and positioned again during conveying.

Description

technical field [0001] This application relates to the field of medical instruments, in particular to a medical guide wire. Background technique [0002] With people's continuous exploration and pursuit of minimally invasive treatment, more and more self-expanding stents and release systems are applied to the treatment of various lesions in the human lumen, such as bile duct, esophagus, neurovascular and so on. At present, in the operation, the delivery of the self-expandable stent is generally completed by using a delivery guide wire. [0003] A metal ring is installed on the existing delivery guide wire to bind the self-expandable stent on the delivery guide wire. During the operation, the metal ring pushes the bound self-expandable stent into the human body lumen along with the delivery guide wire. The self-expandable stent is released to make it cling to the inner wall of the human body cavity, and the delivery guide wire is removed to complete the delivery process. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/95A61L31/18A61L31/02A61L31/04
Inventor 谢志永罗七一李雨王森金巧蓉
Owner MICROPORT NEUROTECH SHANGHAI