Implantable endocardial lead with fixation apparatus retractable

Details Implantable endocardial lead with fixation apparatus retractable Implantable endocardial lead with fixation apparatus retractable

1989-05-16

1990-11-06

Cohen, Lee S.

Surgery

Truss

Pad

128642, A61N 105

Patent

active

049677667

ABSTRACT:
An implantable endocardial lead with retractable fixation apparatus. The fixation apparatus 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 lanyard 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 piston supporting the helix. At the proximal end of the lead, a jig moves the lanyard with respect to a longitudinal axis of the lead. When the helix is in an exposed position, torque can be transmitted from the proximal end of the lead to the distal end thereof, through the electrode to 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.

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patent: 4146036 (1979-03-01), Dutcher et al.
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patent: 4381013 (1983-04-01), Dutcher
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patent: 4577643 (1986-03-01), Beranek
patent: 4590949 (1986-05-01), Pohndorf
patent: 4624266 (1986-11-01), Kane
patent: 4628943 (1986-12-01), Miller
patent: 4649938 (1987-03-01), McArthur
patent: 4667686 (1987-05-01), Peers-Travarton
patent: 4842590 (1989-06-01), Tanabe et al.

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