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Mesh tubular spring for embolism and preparation method thereof

A tubular, embolization technology, applied in medical science, surgery, etc., can solve the problems of no shape memory function, tumor parent vessel embolism, and lack of good elasticity, so as to achieve good shape memory function, prevent blood vessel embolism, and shorten embolization time. Effect

Active Publication Date: 2012-01-04
APT MEDICAL HUNAN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain deficiencies in the embolic materials and embolization methods of the prior art. Aneurysm embolization by injection is a mixture of embolic agent and contrast agent delivered into the aneurysm to cause embolization of the aneurysm, but there is a possibility of embolization of the parent vessel.
Embolization coils are made of platinum and its alloy wires. Platinum and its alloy coils are heavy and have no shape memory function. Creates a condition where the aneurysm cannot be completely filled, resulting in incomplete embolization of the aneurysm
At the same time, due to the heavy weight of platinum and alloys, and the lack of good elasticity, the coil cannot be firmly supported on the inner wall of the aneurysm, and the tail end of the coil may hang down inside the parent artery, resulting in secondary embolism of the blood vessel.

Method used

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  • Mesh tubular spring for embolism and preparation method thereof
  • Mesh tubular spring for embolism and preparation method thereof
  • Mesh tubular spring for embolism and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1, such as figure 1 As shown, the net tubular embolic spring of the present invention is braided into a straight cylindrical net tube by nickel-titanium alloy wire with shape memory function (or called elasticity) and platinum wire developed under X-ray irradiation, such as figure 2 As shown, the straight cylindrical network tube is wound around an axis to form a helical tube to form a network tube-shaped helical coil. The total number of nickel-titanium alloy wires and platinum wires constituting the braided wire is 4 to 72, preferably 8 to 32, and most preferably 16. Nitinol alloy wire is used in the braided wire, so that the spiral tube has the function of memory and restoring the original shape. There is no limit to the number of platinum wires in the total number of braided wires. It is best to add 2 platinum wires in a symmetrical arrangement, so that neither It affects the development of the tubular helical coil under X-ray irradiation, and ensures the ...

Embodiment 2

[0038] Embodiment 2, the net tubular helical coil of net tubular embolism spring is non-uniform diameter, as Figure 4 As shown, in the preparation of the non-uniform diameter mesh-shaped helical coil, the middle mandrel and / or the middle size of the metal mandrel is large and the two ends are small, or the middle size is small and the two ends are large, or the middle mandrel and the metal mandrel are large. The diameter of the mandrel changes in the axial direction, so that the network tubes of the tubular helical spring coil are in different sections, and the diameters of the network tubes are not the same. The mesh-shaped helical coils that are finally wound out have different mesh diameters and / or helical diameters in different cross-sections. Depending on the cross-section of the aneurysm, the denser packing of the aneurysmal space by non-uniform diameter tubular embolic coils will be greater. The same method as in Example 1 can be used to deliver the non-uniform diamet...

Embodiment 3

[0039] Embodiment 3, the shape of the net tubular embolism spring is a space network, such as Figure 5 As shown in Fig. 1, the braided straight cylindrical network tube is spiraled onto another space curved metal mandrel mold, and after heat treatment and setting, the middle mandrel and the space curved metal mandrel mold are removed, and the network tube will form a network tube shape consistent with the space surface. Space surface structure. The mesh-shaped embolic spring is more capable of adapting to the aneurysm space, and placing the mesh-shaped embolic spring in the aneurysm can more stably pack the aneurysm. The same method as in Example 1 can be used to send the space-shaped tubular embolic spring into the aneurysm.

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Abstract

The invention discloses a mesh tubular spring for embolism, which aims at solving the technical problem of enabling an aneurysm to quickly form an embolism so as to prevent rupture of the aneurysm and angiogenesis embolization. The mesh tubular spring for embolism disclosed by the invention is a mesh tubular helical spring ring or a mesh tubular spatial mesh spring woven through nickel-titanium alloy wires and platinum wires. The preparation method of the mesh tubular spring disclosed by the invention comprises the steps of: weaving the nickel-titanium alloy wires and the platinum wires into a straight cylindrical mesh tube; helically winding; performing heat treatment; welding a sleeve; and welding a guide wire head and a guide wire pole. Compared with the prior art, the mesh tubular helical spring ring is woven into mesh tubular shape through the nickel-titanium alloy wires and the platinum wires, the nickel-titanium alloy wires have good shape memory function, and the spring is more stable after the mesh tubular spring for embolism made of the nickel-titanium alloy wires is put into the aneurysm so as to fill up the space inside the aneurysm more easily; the mesh tubular spring for embolism adopts a multi-mesh structure, dense meshes can cause embolism more easily so as to reduce the aneurysm embolization time, prevent the aneurysm from rupture and effectively prevent angiogenesis embolization.

Description

technical field [0001] The invention relates to a medical device and a preparation method thereof, in particular to an embolism coil for treating aneurysms and a preparation method thereof. Background technique [0002] Aneurysms are usually formed due to the impact of blood on the vessel wall, resulting in the thinning of the local vessel wall. Various embolization devices have been developed in the world to treat aneurysms. For example, embolization balls, platinum coils, injection suspensions such as: polymer beads, microfiber capsules, etc. These materials are guided into the aneurysm through a catheter, fill the space of the aneurysm, and cause thrombus to form in the aneurysm in a short time, reducing the direct impact of blood on the aneurysm wall, thereby preventing the aneurysm from rupture. There are certain deficiencies in the embolic materials and embolization methods of the prior art. Aneurysm embolization by injection is a mixture of embolic agent and contras...

Claims

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Application Information

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IPC IPC(8): A61B17/12A61L31/02
Inventor 成正辉马廉亭郭怀球
Owner APT MEDICAL HUNAN INC
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