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Steerable catheter

A movable catheter technology, which is applied in the catheter field of medical treatment equipment, can solve the problems of reduced insertability and sacrificing operability

Active Publication Date: 2021-10-22
NAT UNIV CORP SHIGA UNIV OF MEDICAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a soft (soft) structure is adopted in consideration of operability, bending and buckling may occur when it breaks through (passes through) a narrow part in a lumen such as a bile duct, and the insertability may be reduced.
Conversely, when a hard (hard) structure is adopted in consideration of operability, operability may be sacrificed

Method used

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Examples

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Embodiment Construction

[0030] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The catheter sheath (moveable sheath) which is the movable catheter of this embodiment is inserted and guided before an electrode catheter for detecting electrocardiogram or an ablation catheter for cauterizing an affected area, etc., when performing catheter ablation, for example. or catheters for ablation catheters and the like. Hereinafter, an introducer sheath will be described as an example of a movable catheter to which the present invention is applied, but the present invention can also be applied to electrode catheters, ablation catheters, and injection of X-ray contrast agents into bile ducts for inspection of bile ducts. Catheters for movable endoscopes, and other movable catheters.

[0031] In addition, catheter ablation refers to a treatment method for treating arrhythmia occurring in the heart, that is, an ablation catheter having a high-frequen...

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PUM

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Abstract

Disclosed is a steerable catheter with which both operability and insertability can be improved. The steerable catheter comprises a flexible tube (2) having a distal end and a proximal end. The tube (2) comprises: a first tube section (sheath body section (20)) the flexibility of which does not substantially change even upon receiving compression force in the axial direction; and a second tube section (deflection section (21)) that is constituted by a porous tube which is joined so as to be continuous with a distal end of the first tube, and which becomes hard upon being compressed according to the degree of compression force acting in the axial direction and returns to being soft when the compression force is released. The tube includes an operation means (wires (W1, W2)) that releasably exerts a compression force which compresses the second tube section in the axial direction and a deflection force which deflects the second tube section.

Description

technical field [0001] The present invention relates to a catheter as a medical treatment tool for performing various treatments, examinations, etc., and particularly relates to a movable catheter (Steerable Catheter) capable of freely deflecting a distal end or the like. Background technique [0002] As medical treatment devices (including, for example, contrast agent injection catheters, electrode catheters, ablation catheters, and catheter sheaths) inserted into target tissues such as various organs (eg, bile duct, heart) through body cavities, lumens, or blood vessels, etc., There is known a movable catheter that can be inserted into a target tissue by operating an operation portion provided on the base end (proximal end) side of the catheter disposed outside the body in order to facilitate its insertion or approach to a target tissue. The direction of the tip (distal end) of the catheter in the body is deflected (for example, refer to Patent Document 1 and Patent Docume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00A61M25/092
CPCA61M25/0147A61M2025/015A61M25/0136A61M25/008A61M25/0074A61M25/0026
Inventor 谷彻山田笃史岛辰也米道渉
Owner NAT UNIV CORP SHIGA UNIV OF MEDICAL SCI
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