Title:
GUIDE WIRE BRAKE
Document Type and Number:
WIPO Patent Application WO2002007613
Kind Code:
A3
Abstract:
An improved guide wire brake (100) that is particularly suited to ablative rotational atherectomy devices is disclosed. The guide wire brake (100) ensures that a guide wire (26) is prevented from rotating or moving axially prior to activation of a primary mover such as a turbine. In one embodiment a pressure relief valve (106) delays the activation of the prime mover on startup, and a check valve (108) delays the release of the guide wire brake (100) on shut down. In a second embodiment the guide wire brake (200) is serially connected to the prime mover such that the prime mover is not connected to the pressurized gas source until after the guide wire brake (200) is engaged. In a third embodiment a guide wire (300) is disposed through a flexible tube (350) within a rigid cylinder (356) that is serially connected to the prime mover, such that when pressurized gas is provided to the prime mover the flexible tube (350) will collapse on the guide wire (26), to prevent guide wire (26) movement. In a fourth embodiment a mechanical brake (400), in a single action, engages the guide wire (26) prior to opening a flow path between the pressurized gas source and the prime mover. Methods for manually bypassing the guide wire brake are also disclosed.
Inventors:
GUO ZIHONG
CHANDRASEKARAN VERIVADA
CHANDRASEKARAN VERIVADA
Application Number:
PCT/US2001/041327
Publication Date:
April 04, 2002
Filing Date:
July 10, 2001
Export Citation:
Assignee:
BOSTON SCIENT LTD (BB)
International Classes:
A61B17/22; A61B17/00; (IPC1-7): A61B17/22
Domestic Patent References:
| WO1999051148A2 | 1999-10-14 |
Foreign References:
| US5893857A | 1999-04-13 | |||
| US5779722A | 1998-07-14 | |||
| EP0268228A2 | 1988-05-25 |
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