Mesh spring ring and manufacturing method thereof

A technology of spring coils and mesh, which is applied in the field of mesh spring coils and its preparation, can solve the problems of heavy weight, compression, and low filling rate of spring coils, etc., and achieve low filling rate, weight reduction, and enhanced embolization effect Effect

Inactive Publication Date: 2015-07-08
APT MEDICAL HUNAN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the filling rate of the coil is low and the filling weight is heavy, which will cause the aneurysm to compress the peripheral nerve tissue.

Method used

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  • Mesh spring ring and manufacturing method thereof
  • Mesh spring ring and manufacturing method thereof
  • Mesh spring ring and manufacturing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0039] The invention provides a method for preparing a mesh spring coil, comprising:

[0040] The metal mesh pipe is prepared by using memory alloy as raw material;

[0041] heat treating the metal mesh pipe to obtain a metal mesh sleeve;

[0042] Fix the spring, metal core and metal mesh sleeve;

[0043] The metal mesh sleeve is sheathed on the outside of the spring, and the inner diameter of the metal mesh sleeve is larger than the outer diameter of the spring; the metal core is arranged through the inside of the spring.

[0044] In the present invention, firstly, the memory alloy is used as a raw material to prepare a metal mesh pipe; the metal mesh pipe is heat-treated to obtain a metal mesh sleeve. The present invention is preferably prepared by a weaving method; the preparation method of the metal mesh sleeve preferably specifically includes: weaving a memory alloy as a raw material to obtain a metal mesh tube; assembling the woven mesh tube on a mold, and shaping it i...

Embodiment 1

[0053] 60 nickel-titanium alloy wires (54.5% nickel, 45.5% titanium) with a diameter of 0.05mm are used to weave the network tube, and the network tube density is 100PPI (Per Point Inch, the number of crossing points per inch); the woven network tube is installed in the heat treatment molding On the mold, it is set into a spiral shape, the heat treatment temperature is 400 ° C, and the heat treatment time is 35 minutes, and the diameter of the net sleeve obtained is 1 mm; the spring is prepared by platinum alloy wire with a diameter of 0.04 mm, and the diameter of the spring is 0.2 mm; the pitch is 0.2 mm ;Put a platinum alloy with a diameter of 0.15mm and a length of 100mm as a metal core and place it inside the spring; place the spring together with the metal core inside the metal mesh sleeve, and use titanium alloy with an inner diameter of 0.2mm and an outer diameter of 0.25 mm, a metal ring 4 with a width of 0.3mm is used to fix the metal mesh sleeve 1, spring 2, and metal...

Embodiment 2

[0055] Use 40 nickel-titanium alloy wires (55% nickel, 45% titanium) with a diameter of 0.1mm to weave the network tube, and the network tube density is 65PPI (Per Point Inch, the number of intersections per inch); the woven network tube is installed in the heat treatment molding The mold is set in a spiral shape, the heat treatment temperature is 500°C, and the heat treatment time is 20 minutes, so that the diameter of the net sleeve is 3mm; the polyvinylpyrrolidone is coated on the surface of the nickel-titanium wire by spraying, and the thickness is 0.01mm. Use platinum wire with a diameter of 0.1mm to prepare the spring, the diameter of the spring is 0.3mm; the pitch is 0.3mm; a gold alloy with a diameter of 0.2mm and a length of 200mm is inserted inside the spring as a metal core; place the spring together with the metal core Inside the metal mesh sleeve, a metal ring 4 made of platinum alloy, with an inner diameter of 0.5mm, an outer diameter of 1.0mm, and a width of 1.0m...

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Abstract

The invention provides a mesh spring ring. The mesh spring ring comprises a metal mesh sleeve and a spring. The spring is sleeved with the metal mesh sleeve, and the inner diameter of the metal mesh sleeve is larger than the outer diameter of the spring. The metal mesh sleeve is a memory alloy mesh. A metal core is arranged in the spring in a penetrating mode. The metal core and the metal mesh sleeve are fixed to the two ends of the spring. The mesh spring ring is used for replacing an existing spring ring structure, the embolism effect is enhanced to a large degree through an expanded mesh shape, the filling rate is low, meanwhile, the weight of fillers is lowered, arterial aneurysm is prevented from oppressing surrounding nervous tissue, the mesh hole structure has the good flexibility and elasticity, and can be attached to the wall of the arterial aneurysm well after being released in a tumor cavity, and the mesh hole structure is stably placed in the arterial aneurysm and cannot fall off. Meanwhile, certain mechanical strength can be achieved in the conveying process through the spring in the spring ring in the metal mesh sleeve, the spring ring has good mechanical conduction, and the shape and position of the mesh spring ring can be displayed under X rays.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a mesh spring coil and a preparation method thereof. Background technique [0002] Endovascular coil embolization is the main treatment for intracranial aneurysms, but the existing coil surgery is expensive, the dense filling rate is low, and the risk is relatively high, especially after filling the cavity of a huge aneurysm with coils. The obvious mass effect can compress the peripheral nerve tissue, and the pressure of gravity can easily cause the occlusion of the parent artery. [0003] Especially for complex lesions such as wide-necked aneurysms, simple coils cannot achieve the therapeutic effect, and must be used in conjunction with stents to prevent the coils from falling out of the aneurysm cavity through the support of the stent, which increases the difficulty of surgery and the cost of treatment. [0004] The prior art discloses an electrolytic detachment coil (GDC), whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/12A61L31/02
CPCA61B17/12031A61B17/12113A61B17/1214
Inventor 成正辉匡华
Owner APT MEDICAL HUNAN INC
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