Catheter with deflectable front end

A technology for catheters and operations, which is applied in the field of catheters and can solve problems such as bending of inflexible parts

Active Publication Date: 2017-08-15
JAPAN LIFELINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] When the operation wire is pulled, the above-mentioned phenomenon (problem) that the flexible part cannot be bent on the same plane (from the first imaginary plane) does not occur when the operation wire is composed of a single wire. Twisted thread constitutes a thread for operation, which becomes a new problem

Method used

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  • Catheter with deflectable front end
  • Catheter with deflectable front end
  • Catheter with deflectable front end

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0057] The electrode catheter 100 of one embodiment of the catheter with a deflectable tip of the present invention is used, for example, in the diagnosis or treatment of cardiac arrhythmia.

[0058] Figure 1 ~ Figure 3 The illustrated electrode catheter 100 of this embodiment includes: a catheter shaft 10 having a flexible portion 10A at the front end; a filling member 20 connected to the front end of the catheter shaft 10; The front end electrode 30 of the catheter shaft 10; the three annular electrodes 32 assembled on the front end flexible part 10A of the catheter shaft 10; The front end flexible part 10A faces the first direction ( figure 1 as well as figure 2 The direction shown by the middle arrow A) is deflected and inserted into the inside of the catheter shaft 10, the front end of the first operation wire 41 is connected and fixed to the perfusion part 20, and the rear end can be used for pulling operation; the second The operation thread 42 is made of a twiste...

no. 2 Embodiment approach

[0145] Figure 4 as well as Figure 5 The illustrated electrode catheter 200 of this embodiment includes: a catheter shaft 210 having a flexible distal portion 210A; a distal electrode 230 fixed to the distal end of the catheter shaft 210; The three ring-shaped electrodes 232 of the flexible part 210A of the front end; the first operation wire 241, which is made of a twisted thread (left twist), so that the flexible part 210A of the front end of the catheter shaft 210 faces the first direction ( Figure 4 as well as Figure 5 The direction shown by the middle arrow A) is deflected and inserted into the inside of the catheter shaft 210, the front end of the first operation wire 241 is connected and fixed to the front end electrode 230, and the rear end can be used for pulling operation; The operation thread 242 is made of a twisted thread (left twist) so that the flexible portion 210A of the distal end of the catheter shaft 210 faces the second direction ( Figure 4 as well ...

no. 3 Embodiment approach

[0190] exist Figure 6 The electrode catheter 300 of the present embodiment, which shows the cross-sectional shape of the flexible distal portion, includes: a catheter shaft 310 having a flexible distal portion 310A; a distal electrode fixed to the distal end of the catheter shaft 310; The three ring-shaped electrodes assembled on the flexible portion 310A of the distal end of the catheter shaft 310; the first operation wire 341 is composed of a twisted thread (left twisted) so that the flexible portion 310A of the distal end of the catheter shaft 310 in the first direction ( Figure 6 The direction shown by the middle arrow A) is deflected and inserted into the inside of the catheter shaft 310, the front end of the first operation wire 341 is connected and fixed to the front end electrode, and the rear end can be used for pulling operation; the second operation Use thread 342, which is made of twisted yarn (left twist), so that the front end flexible portion 310A of the cath...

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Abstract

The present invention provides a catheter with a deflectable front end, which is provided with a catheter shaft (10) having a flexible part (10A) at the front end, an electrode (30) at the front end, and an operation wire ( 41 and 42), the operation wires (41 and 42) are respectively inserted through the lumens (11L and 12L) formed in the flexible part (10A), and the flexible part (10A) separates The central axis of the landing shaft (10) [M 10 ] The tubular high rigidity members (51 and 52) are arranged oppositely, and the high rigidity members (51 and 52) are arranged on the axis (10) of the second imaginary plane (P2) perpendicular to the first imaginary plane (P1). The central axis [M 10 ] as the center rotated by an angle (θ) in the same direction as the twisting direction of the twisted yarn has its own central axis [M 51 ] and [M 52 ]. According to this catheter with a deflectable tip, the shape of the flexible portion is changed on substantially the same plane even though the manipulation thread is made of twisted yarn.

Description

technical field [0001] The present invention relates to a catheter with a deflectable front end. More specifically, it relates to a catheter that can be inserted into a body cavity by manipulating an operation unit arranged outside the body to bend the front end of the catheter and change the direction of the front end. The tip of the catheter can be deflected for operation. Background technique [0002] For example, in an electrode catheter inserted into the inside of the heart via an arterial vessel, it is necessary to operate an operation unit mounted on the rear end (proximal end or hand side) of the catheter disposed outside the body to insert it into the heart. A change in orientation (deflection) of the front end (distal end) of the inner catheter. [0003] As a mechanism for deflecting the distal end of the catheter by operating on the hand side, a mechanism disclosed in Patent Document 1 below is known. In the mechanism disclosed in Patent Document 1, a leaf sprin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M25/092
CPCA61M25/0144A61B18/1492A61B2018/00351A61B2018/1467A61M25/0147
Inventor 森谦二
Owner JAPAN LIFELINE CO LTD
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