Patent ID: 7837724
Filing Date: 2010-11-23
Classification: A61F

Abstract:
1. A catheter sheath with a sheath control mechanism for retraction and advancement of the sheath, the control mechanism having: a. a first part which is able to move back and forth along a longitudinal axis, the first part being associated with the catheter sheath so that movement of the first part in one direction along the axis causes retraction of the sheath and movement in the opposite direction causes advancement of the sheath, b. a second part which can be rotated about a rotation axis, wherein: (1) the movement of the first and second parts is associated by a thread disposed on one of the first and second parts, the other of the first and second parts having a lug which is able to move into and out of the thread, whereby rotation of the second part causes the first part to move along a longitudinal axis to retract or advance the catheter sheath depending on the direction of the rotation, (2) the lug is disengageable to disassociate the movement of the first and second parts, thereby allowing movement of the first part to advance the sheath without corresponding rotation of the second part, and (3) the one of the first and second parts having the thread disposed thereon has a ramp, up which the lug moves on rotation of the second part, the ramp urging the lug out of the thread to thereby disengage the lug from the thread.