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 (stai

Method used

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

Examples

Experimental program
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Effect test

Example

[0056] The first embodiment

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

[0058] figure 1 The electrode catheter 2 of the illustrated embodiment is used for diagnosis or treatment of arrhythmia of the heart, for example.

[0059] in figure 1 Here, reference numeral 4 is a hose, reference numeral 10 is a tip chip electrode fixed to the distal end of the hose 4, and reference numeral 12 is a ring electrode installed at the distal end of the hose 4. The reference number 6 is a connector (handle) installed on the proximal end of the hose 4, and the reference number 7 is a roller that is installed on the connector 6 to perform the deflection operation (swing operation) of the distal end of the hose 4 . Leads (not shown) electrically connected to the tip chip electrode 10 and the ring electrode 12 are drawn out from the connector 6.

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

Example

[0094] Second embodiment

[0095] Image 6 with Figure 7 These are a partially cut-away front view and a partially cut-away 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 and shape of the electrode catheter of this embodiment figure 1 The first embodiment shown is the same. Such as Image 6 with Figure 7 As shown, the electrode catheter of this embodiment includes: a hose 4; a tip chip electrode 10 fixed at the distal end of the hose 4; a plurality (two) of ring electrodes 12 installed at the distal end of the hose 4 The leaf spring 25 arranged on the distal end side (near the distal end) of the hose 4; the operating wire 35 arranged to extend in the axial direction inside the hose 4; The distal end clamps the ring member 40 fixed on the surface 252 of the...

Example

[0116] Embodiment 3

[0117] Figure 8 with Picture 9 These are a partially cut-away front view and a partially cut-away plan view of the distal end side of the electrode catheter according to another embodiment of the present invention.

[0118] In addition, the same reference numerals are given to the same or corresponding components as in the second embodiment.

[0119] The appearance and shape of the electrode catheter of this embodiment figure 1 The first embodiment shown is the same. Such as Figure 8 with Picture 9 As shown, the electrode catheter of this embodiment has the same structure as the second embodiment, and additionally includes: an operating wire 36 arranged to extend along the surface 251 side of the leaf spring 25 inside the hose 4; A sleeve 61 for preventing detachment at the distal end of the wire 36.

[0120] The operation wire 36 constituting the electrode catheter of the present embodiment is a wire whose one end is the proximal end, and is in the distal ...

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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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