Implantable endocordial lead with torque-transmitting lanyard

Details Implantable endocordial lead with torque-transmitting lanyard Implantable endocordial lead with torque-transmitting lanyard

1989-11-02

1991-10-15

Jaworski, Francis

Surgery

Truss

Pad

128785, A61N 104

Patent

active

050565168

ABSTRACT:
An implantable endocardial lead with retractable fixation means. The fixation means comprises a sharpened helix which can be repeatedly both retracted within an electrode at a distal end of the lead and displaced outside the electrode by action of a flexible, tubular lanyard. The landyard passes through a lumen from a proximal end of the lead to the distal end of the lead, where the lanyard is attached to a sliding member supporting the helix. At the proximal end of the lead, a jig moves th4 lanyard with respect to a longitudinal axis of the lead. When the helix is in an exposed postion, torque can be transmitted from the proximal end of the lanyard to the distal end thereof, through the piston and then to the helix to screw the helix into the endocardial tissue. To stiffen the lead during implantation, a stylet can be inserted into a lumen in the lanyard.

REFERENCES:
patent: 4209019 (1980-06-01), Dutcher et al.
patent: 4463765 (1984-08-01), Gold
patent: 4570642 (1986-02-01), Kane et al.

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