Catheter

A technology of catheter and catheter body, applied in the direction of catheter, etc., can solve the decrease of torque transmission between catheter body and nozzle, the boundary part between the proximal end of the nozzle and the distal end of the catheter body, and the tip of the nozzle stuck on the narrow part, etc. problems, to avoid sharp changes in flexibility or flexibility, high flexibility, and excellent torque transmission.

Active Publication Date: 2010-06-09
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the nozzle reaches the narrow part, the tip of the nozzle may get stuck on the narrow part. In the state where the nozzle cannot be rotated, even if the catheter body is rotated, there will be a gap between the proximal end of the nozzle and the distal end of the catheter body. There is also the case where the torsional stress concentration acts on the boundary part of the part
In addition, since the nozzle is soft, it is also confirmed that the torque transmission between the catheter body and the nozzle tends to decrease

Method used

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Embodiment Construction

[0040] Next, in order to describe the present invention more specifically, the catheter structure of the present invention will be described in detail with reference to the accompanying drawings.

[0041] first, figure 1 As one embodiment of the catheter having the structure of the present invention, a catheter used for inserting into a cardiac blood vessel in which a stenosis is formed to dilate the stenosis in the blood vessel is shown. From figure 1 It can be seen that the catheter 10 of this embodiment includes: a catheter body 11; a flexible nozzle 12, which is arranged on the distal end (tip) of the catheter body 11;

[0042] More specifically, from figure 1 and figure 2 It can be seen that the catheter body 11 is composed of a hollow elongated member, and the hollow elongated member has a lumen 16 into which a guide wire can be inserted. Here, the overall length of the catheter main body 11 is set to be about 1500 mm. In addition, the portion of the catheter main ...

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Abstract

The invention discloses a catheter, which has a structure that a catheter body 11 includes a hollow coil 24 whose outer and inner surfaces are coated with outer and inner resin layers 28 and 26. A resin tip 12 is provided at a distal end 48 of the catheter body. The tip 12 has a tapered section 46 at a distal end of the tip. Also, an axially extending braid is embedded in the catheter body 11 andthe tip 12 to extend from the catheter body 11 to the tip 12 in the axial direction. The inventive catheter has plasticity, can reduce the stress concentration of the boundary part between the catheter body and the tip, and can exert higher torque transmissibility at the boundary part.

Description

technical field [0001] The present invention relates to catheters having a catheter body consisting of coiled tubing. Background technique [0002] Catheters having a catheter main body made of a coiled body are known as catheters that are inserted into human tubular organs such as blood vessels, digestive canals, and urinary catheters or tissues in the body (for example, refer to Patent Documents 1 and 2). , while the coil body is formed by winding or twisting multiple metal wires. In addition, there is also a catheter in which a coiled body constituting the catheter main body is covered with resin, and a cylindrical resin nozzle having a tapered portion is provided at the distal end (tip portion) thereof (for example, refer to The following patent document 3). [0003] These catheters can exhibit excellent torque transmission performance because the catheter body is constituted by a coil body. Therefore, it is suitable for use, for example, in an operation to maintain a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00
CPCA61M2025/0081A61M25/0108A61M25/0053A61M2025/0059A61M25/005
Inventor 下神学渡边允祥
Owner ASAHI INTECC CO LTD
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