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Embolization coil

A technology of embolic coils and coils, which is applied in the field of embolic coils, can solve the problems of reducing the transportability of embolic coils, and cannot prevent the unlimited stretching of embolic coils, and achieve the effect of reducing the deterioration of transportability

Inactive Publication Date: 2012-04-04
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since there is no stretch-resistant member in the structure of Patent Document 1, unlimited stretching of the embolic coil itself cannot be prevented, and there is a reduction in the transportability of the embolic coil due to the pitch winding portion at the end (embolic coil In the case of movement in the catheter, position correction after recovery, and operability such as relocation)
In addition, in the configuration of Patent Document 2 (the total length of the above-mentioned stretch-resistant member is larger than the coil length of the embolic coil itself in the normal state), in terms of preventing the breakage of the stretch-resistant member (for example, preventing the case of fracture, etc.), there is still room for research

Method used

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Examples

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Embodiment 1

[0054] In a metal coil (coil diameter of 0.25 mm) formed by a platinum-tungsten alloy wire (0.04 mm in outer diameter), within a range of 30 mm from one end of the coil, there will be 30% of the outer diameter of the platinum-tungsten alloy wire. The pitch wound part with a pitch interval, and the remaining pitch wound coil with a natural length of 200 mm and a platinum-tungsten alloy wire (outer diameter of 0.01 mm) are formed at 2 different points. Between them, an embolization coil having a helical secondary shape (substantially cylindrical) with a diameter of 16.0 mm was fabricated. The natural length before fixing of the coil arranged between two different points was adjusted so that it became 102% of the length before fixing of the stretch-resistant thread arranged between two different points. The above two points of difference refer to both ends of the metal coil.

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Abstract

Provided is an embolization coil in which even if the coil is wound in a shape of a small diameter, an elongation-preventing wire is not broken and the delivery property thereof can be prevented from deterioration. An embolization coil has a coil of partial or full-pitch winding and an elongation-preventing wire which are fixed respectively at two points different from each other, and is characterized in that the natural length of the coil arranged between two different points before the coil is fixed is longer than the length of the elongation-preventing wire arranged between two different points before the elongation-preventing wire is fixed.

Description

technical field [0001] The present invention relates to embolic coils for endovascular therapy. More specifically, it relates to an embolization coil used for cerebral aneurysm, blood vessel embolization, and the like. Background technique [0002] Currently, intravascular therapy using a catheter or the like is known as a less invasive therapy for intravascular lesions such as aneurysms. In this intravascular therapy, various characteristics such as the following are required for an embolization coil used in a blood vessel. [0003] First of all, it must have the necessary flexibility and disposition ability to perform indwelling operations without causing problems such as damage to the walls of blood vessels and aneurysms due to excessive load on the applied parts such as blood vessels and aneurysms. [0004] In addition, in order to have the function of preventing unlimited stretching of the embolic coil itself, it is necessary to recover the embolic coil after being te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/12
CPCA61B17/12145A61B17/12022A61B17/12154A61B17/12A61L27/04
Inventor 山中康嗣野一尚子小川笃志
Owner KANEKA CORP
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