Patent ID: 7758625
Filing Date: 2010-07-20
Classification: A61F,A61M

Abstract:
1. A system for delivering and deploying a medical device within a patient, the system comprising: a delivery catheter including an inner catheter member having a region for mounting the medical device thereon and an outer restraining member co-axially disposed over inner catheter member and the medical device, the outer restraining member being adapted for axial movement with respect to said inner catheter member; a control handle having a rotatable thumbwheel connected to a retraction mechanism, the inner catheter member having a proximal end attached to the control handle and the outer restraining member having a proximal end attached to the retraction mechanism, wherein rotation of the thumbwheel causes linear movement of the retraction mechanism to proximally retract the outer restraining member to uncover the medical device while the inner catheter member remains stationary, wherein the retraction mechanism includes a gear rack which is slideable within a channel formed in the control handle and a spur gear which directly engages the gears of the gear rack, the thumbwheel having an actuating gear attached thereto which engages the spur gear to cause the gear rack to move linearly within the channel when the thumbwheel is rotated; stop means for preventing unintentional movement proximal of the gear rack; and means for allowing motion of the gear rack in only one direction within the channel, wherein the means for allowing motion of the gear rack in only one direction is a spring having an edge which contacts the distal surface of the gears forming the gear rack to prevent distal movement of the gear rack.