Implantable endocardial lead with spring-loaded screw-in fixation apparatus
First Claim
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1. A lead assembly for implantation in a patient, the assembly comprising:
- an electrode adapted for insertion into a chamber of the patient'"'"'s heart for electrical stimulation thereof and having a lumen extending through the electrode from a proximal end to a distal end thereof;
a lead having a sheath and a conductor, said conductor connected to said proximal end of the electrode at a distal end of the lead and adapted to transmit electrical impulses between the electrode and a proximal end of the lead, the lead having a lumen extending through the lead from the proximal end to the distal end thereof; and
means for securing the electrode to the lining of the heart chamber, the securing means being in the lumen of the electrode and havingfixation means for penetrating the lining of the heart,spring means for rotating said fixation means, andmeans for releasing said spring means to permit rotation of said fixation means.
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Accused Products
Abstract
An implantable endocardial lead with retractable sharpened helix. The piston has a central bore for receiving a specialized stylet. The stylet comprises a flexible wire having an enlarged distal end or tip. An elastomeric sliding sleeve fits over the wire. When the proximal end of the stylet is inserted into the bore in the piston, the wire can be withdrawn slightly, pulling the enlarged tip into the tube, and wedging the tube against the walls of the bore. By manipulating the stylet, the helix can be exposed outside of the lead, or retractable into the lead, as desired.
93 Citations
12 Claims
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1. A lead assembly for implantation in a patient, the assembly comprising:
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an electrode adapted for insertion into a chamber of the patient'"'"'s heart for electrical stimulation thereof and having a lumen extending through the electrode from a proximal end to a distal end thereof; a lead having a sheath and a conductor, said conductor connected to said proximal end of the electrode at a distal end of the lead and adapted to transmit electrical impulses between the electrode and a proximal end of the lead, the lead having a lumen extending through the lead from the proximal end to the distal end thereof; and means for securing the electrode to the lining of the heart chamber, the securing means being in the lumen of the electrode and having fixation means for penetrating the lining of the heart, spring means for rotating said fixation means, and means for releasing said spring means to permit rotation of said fixation means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification