Patent ID: 6763270
Filing Date: 2004-07-13
Classification: A61N

Abstract:
A removable implantable cardiac stimulation lead system for use with an implantable stimulation device, the lead system comprising:a lead comprising a proximal connector coupled to an active fixation electrode by a conductor, the conductor being surrounded by an insulating sheath and comprising a lumen therein, the active fixation electrode comprising an extendable-retractable mechanism for activating the active fixation electrode by rotating the conductor, wherein the active fixation electrode further comprises a helix and a latching means accessible through the lumen, wherein the latching means comprises a distal shaft/electrode member having a distal portion coupled to the helix and a proximal portion coupled to the conductor; and a stylet comprising a stylet latching means at a distal end thereof, the stylet latching means being adapted to couple to the distal shaft/electrode member so that a predetermined pull force may be applied to remove the electrode from cardiac tissue without disengaging the stylet from the electrode; wherein the stylet latching means is detachable; wherein the stylet latching means comprises a threaded portion dimensioned to grip the electrode when the pull force is exerted; and wherein the distal shaft/electrode member comprises a corresponding threaded bore for receiving the threaded portion of the stylet which locks the distal end of the stylet to the distal shaft/electrode member by rotating the threaded portion into the threaded bore, wherein the stylet is removable by counter-rotating the threaded portion.