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Stent delivery catheter

A catheter and inner tube technology, applied in the field of stent delivery catheters, can solve the problems of increased burden on both doctors and patients, prolonged operation time, complicated operations, etc., and achieve the effects of reduced pulling resistance, weakened expansion force, and easy position confirmation

Inactive Publication Date: 2009-04-08
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the supplied physiological saline is immediately lost from between the inner tube and the outer tube when the outer tube is pulled, it is necessary to perform the operation of supplying physiological saline multiple times, and there is a problem that the operation during the operation is very complicated.
Therefore, there is also a problem that the operation time is prolonged as a result, and the physical burden on both the doctor and the patient increases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0119] The outer diameter of the outer tube, the pitch of the wires constituting the braid, and the inclination angle α were varied, and the strength and visibility (transparency) of the outer tube were evaluated. The results are shown in Table 1.

[0120] 【Table 1】

[0121] Pipe diameter (φ)

[0122] In the outer tube A of the preferred embodiment of the present invention, in which the inclination angle α formed by the wire rod and the axis of the inner tube is larger than 35 degrees and smaller than 60 degrees, rigidity (strength) can be maintained and transparency (visibility) can also be maintained. it is good. On the other hand, for the outer tubes B and C whose inclination angle α is larger than the preferred range of the present invention, both rigidity (strength) and transparency (visibility) showed poor results in Examples.

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Abstract

A stent delivery catheter having an inner tube that has the distal end and the proximal end and where a stent is placed on the outer periphery surface on the distal end side; an outer tube that has the distal end and the proximal end, coaxially placed on the outer peripheral side of the inner tube, and is axially movable relative to the inner tube; and drive means that is placed on the proximal end sides of the inner tube and outer tube and can move the outer tube relative to the inner tube to the proximal end side. As the drive means moves, liquid is caused to flow between the inner tube and the outer tube, from the proximal end side to the distal end side.

Description

technical field [0001] The invention relates to a stent delivery catheter for indwelling a stent in a body, and in more detail relates to an easy-to-operate stent delivery catheter for indwelling a stent in a body. Background technique [0002] For example, there is known a medical method in which a stent is placed in a narrowed part in order to secure opening (opening) of a digestive organ narrowed by cancer cells or a blood vessel narrowed by arteriosclerosis. A stent is an indwelling device to expand a stenosis to secure a lumen, and is broadly classified into a self-expanding stent and an arterial-expanding stent according to the expansion method. These are used according to the site where the stenosis occurs, and in particular, when indwelling a self-expandable stent in the body, it is known to use the stent delivery catheters described in Patent Documents 1 to 8, for example. In addition, Patent Document 2 is a patent document of a foreign application corresponding to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/82A61F2/95
CPCA61F2002/9517A61F2/95A61F2/9517
Inventor 篠原尚树权志明朝比奈巧丰川秀英
Owner ZEON CORP
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