Tina Chan,Tom A. Ditter,Kristine Fuimaono,Debby Grunewald,Eduardo Jimenez,Robert W. Pike,Michael O. Zirkle
申请号：
US13826698
公开号：
US20130304062A1
申请日:
2013.03.14
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A catheter includes an elongated body, a distal assembly with a shape-memory member defining a generally helical form, and a control handle. The control handle may be adapted to actuate a deflection puller wire for deflecting a portion of the elongated body and a contraction wire for contracting the generally helical form. The generally helical form carries irrigated ablation ring electrodes. A nitinol support member with shape memory extends through the distal assembly and into the elongated body to provide the helical form. The support member may have a varying stiffness along its length, for example, a decreasing stiffness toward a distal end of the support member. The support member can also be hollow so that it can receive a mandrel whose stiffness is greater than that of the support member.
