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Catheter having deflectable leading end

A catheter and hose technology, which is applied in the field of catheters whose front end can be operated in a biased direction, can solve the problems of reduced adhesion, poor wettability, and the front end chip electrode falling off in the living body, and achieves the effect of preventing falling off and preventing prolapse

Active Publication Date: 2011-08-17
JAPAN LIFELINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Here, the connection and fixation of the front-end chip electrode and the distal end of the tube is usually performed with an adhesive, but the adhesive strength may decrease due to aging of the adhesive over time.
[0009] In addition, when connecting and fixing the front-end chip electrode and the leaf spring, solder is usually used, but since the material of the leaf spring (stainless steel with good spring properties, Ni-Ti alloy) has poor wettability with solder, soldering is used. It is difficult to connect and fix
[0010] Therefore, the front-end chip electrode cannot be connected and fixed to the distal end of the catheter with sufficient bonding force, and the front-end chip electrode may fall off in the living body during the use of the electrode catheter.

Method used

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  • Catheter having deflectable leading end
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  • Catheter having deflectable leading end

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0057] Hereinafter, the present invention will be described based on the embodiments shown in the drawings.

[0058] figure 1 The lead catheter 2 of the illustrated embodiment is used, for example, for the diagnosis or treatment of cardiac arrhythmias.

[0059] exist figure 1 Among them, the reference numeral 4 is a hose, the reference numeral 10 is a front-end chip electrode fixed at the distal end of the hose 4, and the reference numeral 12 is a ring-shaped electrode installed at the distal end of the hose 4. Reference numeral 6 is a connector (handle) mounted on the proximal end of the hose 4, and reference numeral 7 is a roller mounted on the connector 6 for performing a biased movement operation (swing operation) of the distal end of the hose 4 . Wires (not shown) electrically connected to the front-end chip electrode 10 and the ring electrode 12 are led out from the connector 6 .

[0060] Such as Figure 2 ~ Figure 4 As shown, the electrode catheter 2 of this embo...

no. 2 Embodiment approach

[0095] Figure 6 and Figure 7 It is a partially cutaway front view and a partially cutaway plan view of the distal end side of an electrode catheter according to another embodiment of the present invention.

[0096] In addition, the same reference numerals are used for the same or corresponding components as those of the first embodiment.

[0097] The appearance shape of the electrode catheter of this embodiment and figure 1 The first embodiment shown is the same. Such as Figure 6 and Figure 7 As shown, the electrode catheter of this embodiment includes: a flexible tube 4; a front chip electrode 10 fixed at the distal end of the flexible tube 4; a plurality (two) ring-shaped electrodes 12 installed at the distal end of the flexible tube 4 ; the leaf spring 25 disposed inside the distal end side (near the distal end) of the hose 4 ; the operation wire 35 arranged to extend axially inside the hose 4 ; The distal end is clamped and fixed to the ring member 40 on the sur...

no. 3 Embodiment approach

[0117] Figure 8 and Figure 9 It is a partially cutaway front view and a partially cutaway plan view of the distal end side of the electrode catheter according to still another embodiment of the present invention.

[0118] In addition, the same code|symbol is attached|subjected to the component which is the same as or corresponds to 2nd Embodiment.

[0119] The appearance shape of the electrode catheter of this embodiment and figure 1 The first embodiment shown is the same. Such as Figure 8 and Figure 9 As shown, the electrode catheter of this embodiment has the same structure as that of the second embodiment, and further includes: an operation wire 36 arranged to extend along the surface 251 of the leaf spring 25 inside the hose 4; The anti-dropping sleeve 61 at the distal end of the wire 36.

[0120] The manipulation wire 36 constituting the electrode catheter of the present embodiment is a wire whose one end is a proximal end, and is directed toward the distal dir...

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Abstract

Provided is a catheter having a deflectable leading end, which can connect and fix an operation wire firmly on a leaf spring whatever material the leaf spring and the operation wire might be made of, so that the operation wire may not leave the surface of the leaf spring while the catheter is being used. The catheter comprises a catheter tube (4), a leading tip electrode (10) fixed at the distal end of the catheter tube (4), an oscillating leaf spring (20) arranged along the axial direction inside of the distal end side of the catheter tube (4) and made deformable in a warping direction, an operation wire (30) arranged to extend in the axial direction inside of the catheter tube (4) and made pullable at the proximal end thereof, and a ring-shaped member (40) for caulking and fixing the distal end portion (303) of the operation wire (30) on one face (201) and / or the other face (202) of the distal end portion (203) of the leaf spring (20).

Description

technical field [0001] The present invention relates to a catheter with a deflectable distal end, and more specifically, to a catheter with a deflectable distal end capable of changing the direction of the distal end of a catheter inserted into a body cavity by manipulating an operating unit arranged outside the body on the proximal end side. 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 part attached to the proximal end (rear end or hand side) of the catheter disposed outside the body to make the catheter inserted into the heart The orientation of the distal end (fixed end of the front chip electrode) is changed (biased). [0003] Conventionally, a mechanism disclosed in Patent Document 1 below is known as a mechanism for deflecting the distal end of the catheter by operating it on the hand side. [0004] In the mechanism shown in this patent document...

Claims

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Application Information

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IPC IPC(8): A61N1/05A61M25/01A61N1/362A61B5/296
CPCA61M2025/015A61M25/0144A61M25/0147A61B18/1492A61B5/6852A61B5/6869A61B2018/00839A61B2018/00577A61B2018/00351A61B5/283
Inventor 增岛克浩
Owner JAPAN LIFELINE CO LTD
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