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Conveying guide wire and manufacturing method thereof

A manufacturing method and guide wire technology, which is applied in the field of medical devices and can solve the problems of manufacturing difficulty and increased manufacturing cost of conveying guide wires

Pending Publication Date: 2021-04-30
MICROPORT NEUROTECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the difficulty and cost of manufacturing the delivery guidewire

Method used

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  • Conveying guide wire and manufacturing method thereof
  • Conveying guide wire and manufacturing method thereof
  • Conveying guide wire and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Vascular stenosis or occlusion will occur in the diseased part of the blood vessel in the human body, and the stent can expand the stenosis or occlusion. In order to ensure that the diseased part of the blood vessel remains expanded, the stent needs to be placed in the diseased part of the blood vessel. Indwelling stents are usually tubular. The stent in this embodiment is a self-expanding stent or a balloon-expandable stent, and the self-expanding stent may be a braided stent, which has a large number of rigid, flexible and elastic wire elements that define a radial expansion helix . The self-expanding stent is usually made of alloys with shape memory or superelastic properties, such as Nitinol alloy. Existing self-expanding stents can be used for the following two types of treatment: first, neurointerventional treatment of intracranial vascular lesions, such as intracranial aneurysm or arteriovenous malformation, intracranial aneurysm refers to the limitation of the...

Embodiment 2

[0078] For the delivery guidewire 100 provided in this embodiment, the parts that are the same as those in the first embodiment will not be described here, and only the differences will be described below.

[0079] Figure 10 It is a partial cross-sectional view of the delivery guide wire 100 in this embodiment. like Figure 10 As shown, the difference between the present embodiment and the first embodiment is that the proximal end of the metal ring 130 defines an opening, and the distal region 121 of the spring is accommodated in the opening. In this way, the spring 120, the metal ring 130 and the core wire 110 cooperate with each other to realize the connection, and the connection strength of the connection is enhanced, wherein, the number of turns of the spring coil in the variable diameter area 122 is greater than or equal to 3, and the spring 120, the The unloading force between the metal ring 130 and the core wire 110 can reach 6.1N-8.3N.

[0080] Correspondingly, the...

Embodiment 3

[0082] For the delivery guidewire 100 provided in this embodiment, the same parts as those in the first and second embodiments will not be described here, and only the differences will be described below.

[0083] Figure 11 It is a partial cross-sectional view of the delivery guide wire 100 in this embodiment. like Figure 11 As shown, the difference between the present embodiment and the second embodiment is that the number of turns of the spring 120 in the variable diameter area 122 of the spring is less than or equal to 1 so that the spring 120, the metal ring 130 and the core wire 110 are separated. The load capacity can reach 8N-9.5N. In some embodiments, the number of turns of the spring 120 in the variable diameter area 122 of the spring is less than 3 / 4, so that the gap between the installed spring 120 and the metal ring 130 is small, and the connection strength is improved, so that the The unloading force of the spring 120, the metal ring 130 and the core wire 110...

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Abstract

The invention provides a conveying guide wire which is characterized in that a core wire is sequentially provided with a first section, a second section and a third section in the direction from the far end to the near end of the conveying guide wire, and the diameters of the sections are sequentially increased. A metal ring is at least partially disposed at a proximal end of the first segment. The second section is at least partially sleeved with the spring, the far end of the spring is connected with the near end of the metal ring, and the diameter of the far end area of the spring is smaller than that of the near end area of the spring. According to the invention, the diameter of the far-end area of the spring is smaller than that of the near-end area of the spring, so that the fit clearance between the far-end area of the spring and the core wire is smaller, and the concentricity of the far-end area of the spring and the core wire is better. Correspondingly, the invention further provides a manufacturing method thereof, the far end of the spring and the near end face of the metal ring do not need to be connected in a welded mode, and the manufacturing difficulty of the conveying guide wire is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a delivery guide wire and a manufacturing method thereof. Background technique [0002] Minimally invasive neurointerventional surgery is a treatment for vascular aneurysms, which usually involves implanting vascular implants, such as stents, coils, and aneurysm closure devices, into the lesion. During implant placement, delivery guide wires and catheters are required. [0003] At present, the core wire is used as the main body of the delivery guide wire. In order to ensure the delivery performance of the delivery guide wire, a spring is provided on the delivery guide wire as a supporting part of the core wire. The spring must not only be concentric with the core wire, but also And also keep relatively fixed with the core wire. Generally speaking, the diameter of the distal end of the spring is very different from the diameter of the core wire, so it is not easy to ensu...

Claims

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Application Information

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IPC IPC(8): A61M25/09
CPCA61M25/09A61M2025/09108A61F2/82A61F2/966A61M2025/09083A61M2025/09166A61M2025/0915A61M2207/00A61F2/95A61M2025/09075
Inventor 崔亚飞刘子昂赵涵饴乔海鹰田浩
Owner MICROPORT NEUROTECH SHANGHAI