ABLATION CATHETER - TERUMO CORP

Title:

ABLATION CATHETER

Document Type and Number:

WIPO Patent Application WO/2014/174662

Kind Code:

A1

Abstract:

Provided is an ablation catheter that, while securing flexibility, suppresses anisotropy of torque transmission performance resulting from rotational direction as much as possible, and thus is able to increase operability. The ablation catheter (10) has: a shaft main body (60) extending in the axial center direction (X) and at which a helical slit (61) is formed; and an electrode chip (31) that imparts a thermal influence on in vivo tissue and that is provided to the tip end, which can be inserted into a living body, of the shaft main body (60). The shaft main body (60) is provided with a site at which there is a different helical inclination angle (α), which is the angle of the direction of extension of the helix of the slit (61) with respect to a cross section perpendicular to the axial center direction (X). A step section (102) at which the angle of the slit (61) with respect to the helical inclination angle (α) locally changes is formed at one opposing surface (100) configuring the slit (61), a contact section (112) that the step section (102) contacts when the shaft main body (60) is twisted in the direction of loosening the helix of the slit (61) is formed at the other opposing surface (110), and the length (L3) in the axial center direction (X) of the step section (102) is formed longer at the site at which the helical inclination angle (α) is relatively large than at a small site.

Inventors:

KOBAYASHI JUNICHI (JP)

Application Number:

PCT/JP2013/062359

Publication Date:

October 30, 2014

Filing Date:

April 26, 2013

Export Citation:

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Assignee:

TERUMO CORP (JP)

International Classes:

A61M25/14; A61B18/12

Foreign References:

JPH11509752A	1999-08-31
JP2000197704A	2000-07-18
JP2005511259A	2005-04-28
JP2012525933A	2012-10-25
JP2012513873A	2012-06-21

Other References: