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Balloon catheter

A balloon catheter and balloon technology, applied in balloon catheters, catheters, stents, etc., can solve the problems of insufficient transmission of external shaft torque, obstruction, and inability to transmit torque, so as to reduce losses and achieve torque Transmissibility, the effect of improving torque transmissibility

Inactive Publication Date: 2013-04-10
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using a braid or a stranded wire coil on the outer circumference of the inner shaft, the torque from the outer shaft cannot be sufficiently transmitted
In addition, in the case of using a braid or twisted wire coil on the outer shaft, since a balloon is mounted on the tip of the outer shaft, the torque from the outer shaft is blocked by the balloon, and the torque cannot be sufficiently transmitted to the tip of the catheter

Method used

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  • Balloon catheter
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] refer to Figure 1-6 The balloon catheter of this embodiment will be described.

[0051] exist Figure 1~3 In the diagram, the left side of the illustration is the front end side (distal end side) inserted into the body, and the right side is the rear end side (side side, base end side) operated by the operator such as a doctor.

[0052] The balloon catheter 10 is used, for example, to treat an occlusion or a stenosis of a heart vessel, and has a total length of about 1500 mm.

[0053] The balloon catheter 10 mainly includes: a balloon 20 , a front-end outer shaft 30 , a strand coil 31 , a rear-end inclined outer shaft 40 , an inner shaft 50 and a connecting portion 60 .

[0054] The front end outer shaft 30 is a bendable cylindrical member. The front end outer shaft 30 is formed by inserting the strand coil 31 into the resin tube 38 and welding the resin tube 38 to the strand coil 31 by heating. In the present embodiment, the outer diameter of the distal end side oute...

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PUM

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Abstract

An object of the present invention is to provide a balloon catheter (10) capable of sufficiently transmitting torque, which is applied from a proximal side to the balloon catheter (10), to a front side of a balloon (20). The balloon catheter (10) includes a large-diameter coil part (32) formed of a stranded coil (31) arranged at a front side outer shaft (31), a small-diameter coil part (34) formed of a stranded coil (31) arranged at an extension part (52) of an inner shaft (50), and a transitional coil part (33) formed of a stranded coil (31) connecting the large-diameter coil part (32) and the small-diameter coil part (34). With this configuration, the torque can be transmitted from the front side outer shaft (31) to a front end of the extension part (52) of the inner shaft (50) through the stranded coil (31).

Description

technical field [0001] The present invention relates to a balloon catheter for dilating a narrowed part or the like in a body cavity such as a blood vessel. Background technique [0002] Conventionally, balloon catheters have been used for dilating narrowed portions in body cavities such as blood vessels. The balloon catheter is mainly composed of a balloon as a dilator, an outer shaft, and an inner shaft arranged inside the outer shaft. The inner shaft is used for inserting a guide wire, and through the lumen provided between the outer shaft and the inner shaft, fluids such as contrast medium or physiological saline used to inflate the balloon flow. [0003] In order to insert such a balloon catheter into a blood vessel or the like and position it at a desired position, an operator such as a doctor operates from the side to transmit torque to the distal end of the catheter. The transmitted torque is mainly the force of pushing the catheter in the axial direction, and it n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M25/10A61M29/02A61F2/958
CPCA61M25/0012A61M25/10A61M25/005
Inventor 岩室成宣池谷伦弘桂田武治
Owner ASAHI INTECC CO LTD