Gareth Davies,Maria Luk,Thomas C. Waram,Bradley H. Strauss
申请号：
US14135656
公开号：
US09345509B2
申请日:
2013.12.20
申请国别(地区):
US
年份:
2016
代理人:
摘要：
Devices and methods are disclosed for widening a channel in a treatment site, the channel containing a guide-wire. The channel is widened by advancing an elongated dilation device, which is configured to fit tightly over the guide-wire at the distal tip of the dilation device and to provide a distal dilating surface, over the guide-wire and at least partially through the treatment site. The dilation device comprises a tubular metallic shaft, typically a metal inner tube, for providing sufficient stiffness and column strength for the dilator to be advanced at least partially through the channel, and a flexible sleeve providing a tapered distal tip. The distal end of the dilator defines a leading surface that is shaped to force away portions of a lesion surrounding the guide-wire away from the guide-wire as the distal end is advanced over the guide-wire through the lesion, whereby a channel through the lesion is at least partially dilated.
