METHODS AND APPARTUS FOR CROSSING OCCLUSIONS IN BLOOD VESSELS

摘要

This disclosure is directed to a device for facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The device includes an intravascular device including a shaft having a distal end and a proximal end. The device includes a handle assembly fixed about the proximal end of the shaft, the handle assembly including a first portion. Rotation of the first portion in a first direction about a longitudinal axis of the shaft causes rotation of the shaft in the first direction when a torque applied by the first portion to the shaft is below a first maximum torque. Further rotation of the first portion in the first direction about a longitudinal axis of the shaft does not cause rotation of the shaft in the first direction when the torque applied by the first portion to the shaft is equal to or above the first maximum torque.

主权项

1. A device for facilitating treatment of a blood vessel, the device comprising:
a shaft having a distal end and a proximal end; and a handle assembly disposed about the shaft; wherein the handle assembly includes a first portion and a torque limiting mechanism coupling the first portion to the shaft; wherein the torque limiting mechanism includes a first ramp that allows relative movement between the first portion and the shaft when the first portion is being rotated in a first direction and a torque applied to the shaft is greater than a first maximum torque; and wherein the torque limiting mechanism allows relative movement between the first portion and the shaft when the first portion is being rotated in a second direction and a torque applied to the shaft is greater than a second maximum torque.