Cardiac Pacemakers, Inc.

Carol Werlein

David M Flynn

Brian D Soltis

Jason Alan Shiroff

Michael P Brenzel

Gregory R Ley

Christopher P Knapp

Larry L Hum

Jason Skubitz

Qingsheng Zhu

Avram Scheiner

Gerrard Merrill Carlson

Jay A Warren

Ronald W Heil, Jr

William Hsu

Yayun Lin

John E Heil

Mary Lee Cole

Peter T Kelley

Curtis Charles Lindstrom

Jeffrey T Bartig

Randall M Peterfeso

Aaron W Janke

Robert S Booker, Iii

Gary W Goebel

Douglas A Heitkamp

Gregory L Sundberg

A lead having an extendable and retractable fixation mechanism has a rotating terminal pin at the terminal end which rotates the fixation mechanism at the distal end. As the terminal pin is rotated, the fixation mechanism is extended or retracted from the distal end of the lead. A threaded collar allows for the fixation mechanism to smoothly extend and retract from the lead, and allows for a 1:1 turn ratio between the terminal pin and the fixation mechanism. A fluoroscopic ring disposed at the distal end of the lead provides information during the implantation process.

Extendable and retractable lead having a snap-fit terminal connector

Single pass lead system

A lead having an extendable and retractable fixation mechanism has a rotating terminal pin at the terminal end which rotates the fixation mechanism at the distal end. As the terminal pin is rotated, the fixation mechanism is extended or retracted from the distal end of the lead. A threaded collar allows for the fixation mechanism to smoothly extend and retract from the lead, and allows for a 1:1 turn ratio between the terminal pin and the fixation mechanism. A fluoroscopic ring disposed at the distal end of the lead provides information during the implantation process. The lead includes a terminal assembly having an outer terminal ring, a terminal pin, and an insulative sleeve disposed between the outer terminal ring and the terminal pin. The insulative sleeve is coupled with the outer terminal ring with a snap-fit connection.

Extendable and retractable lead

A single-pass endocardial lead electrode adapted for implantation in, on or about the heart and for connection to a system for monitoring or stimulating cardiac activity includes a lead body which is adapted for implantation within a single chamber of the heart, or multiple chambers of the heart. The lead includes a first distal end electrode which has a first electrical conducting surface. The lead body also has a second electrode which has a second electrical conducting surface. The first and second electrodes are either passively or actively attached to the wall of the heart. The lead body also includes a curved portion which facilitates the positioning of the second electrode. The main lead body alternatively includes a recess into which an atrial lead body and an active fixation element attached to one end can travel from a recessed position to a position for fixation to the wall of the heart. The active fixation element can also be moved by turning the terminal pin. The lead body can also include multiple legs, each leg carrying an electrode. The lead is attached to a pulse generator for producing pulses to the multiple sites within the heart. A movement assembly for advancing a helix is also included within the legs and comprises an externally threaded collar which engages with an internally threaded housing or housing insert. The lead further includes a helical tip which has high impedance. The electrode has at least one features of the group: the helix having a coating of an insulating material on its surface, the helix having its surface beyond the distal end of the electrode and the distal end of the electrode having a porous conductive surface at a base of the helix, a porous conductive element at a base of the helix, and a porous conductive element at the end of the electrode having an insulating coating cover from 5-95% of the surface of the porous conductive element. The porous element may further provide a guiding mechanism for the helix as it travels out of the electrode for securing the electrode to the heart.

A single pass endocardial lead is provided which is adapted for implantation on or about the heart and for connection to a system for monitoring or stimulating cardiac activity. The lead includes a main body which extends into two distal leg portions, each having at least two electrodes coupled therewith. The first leg is for positioning within the ventricle of the heart. The second leg is for positioning within the atrium of the heart. Both the first leg and the second leg are bipolar and are adapted for positioning and fixation to the heart wall. The first and second legs can be fixated to the heart wall using either passive or active fixation structures. A movement assembly for advancing a helix comprises an externally threaded collar which engages with an internally threaded housing or housing insert.

Single pass lead and system with active and passive fixation elements

Growing community of inventors

Ham Lake, MN, United States of America

Carol Werlein