Title:
CATHETER HAVING DEFLECTABLE TIP
Document Type and Number:
WIPO Patent Application WO/2022/239127
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a catheter having a deflectable tip which has excellent torque transfer without the occurrence of whipping even when the catheter shaft is deformed, and which also has excellent planarity of the deformed shape at the tip portion of the shaft. This catheter having a deflectable tip comprises: a catheter shaft (10) having a tip flexible portion; a leaf spring (20) having a rectangular cross section disposed inside the tip flexible portion along the central axis of the catheter shaft; and operational wires (51, 52) that, in order to bend the tip flexible portion, are eccentric from the central axis of the catheter shaft, extend inside the catheter shaft, and are capable of a pulling operation for pulling the rear end of the catheter shaft. If the outer diameter of the catheter shaft is defined as D, the width of the leaf spring as W, and the thickness of the leaf spring as t, the value of (W/D) is 0.20-0.65, and the value of D/(W・t) is 20-45.
Inventors:
KAMIYAMA HIROKI (JP)
SASAKI TAKUYA (JP)
KOISO TOMOHARU (JP)
WATANABE TAKAFUMI (JP)
SASAKI TAKUYA (JP)
KOISO TOMOHARU (JP)
WATANABE TAKAFUMI (JP)
Application Number:
PCT/JP2021/017930
Publication Date:
November 17, 2022
Filing Date:
May 11, 2021
Export Citation:
Assignee:
JAPAN LIFELINE CO LTD (JP)
International Classes:
A61M25/092
Domestic Patent References:
| WO2021070543A1 | 2021-04-15 |
Foreign References:
| US20080188800A1 | 2008-08-07 | |||
| JP2006255401A | 2006-09-28 | |||
| JP2013138864A | 2013-07-18 | |||
| US5855560A | 1999-01-05 | |||
| JP2012200445A | 2012-10-22 |
Download PDF: