| US 7,493,175 B2 | ||
| Subcutaneous lead with tined fixation | ||
| Adam W. Cates, Minneapolis, Minn. (US); Ron Heil, Roseville, Minn. (US); Curtis Charles Lindstrom, Roseville, Minn. (US); and Jason Alan Shiroff, Shoreview, Minn. (US) | ||
| Assigned to Cardiac Pacemakers, Inc., St. Paul, Minn. (US) | ||
| Filed on Dec. 18, 2003, as Appl. No. 10/739,877. | ||
| Claims priority of provisional application 60/462272, filed on Apr. 11, 2003. | ||
| Prior Publication US 2004/0230279 A1, Nov. 18, 2004 | ||
| Int. Cl. A61N 1/00 (2006.01) | ||
| U.S. Cl. 607—126 | 29 Claims |
| 1. An implantable lead configured for placement within a tunnel formed in subcutaneous non-intrathoracic tissue, comprising:
a lead body;
a cardiac electrode supported by the lead body, the cardiac electrode configured for one or both of sensing cardiac activity
and delivering cardiac stimulation energy from a location within the tunnel; and
a plurality of fixation elements disposed longitudinally along at least an electrically insulative portion of the lead body
in a spaced relationship, the fixation elements configured to passively secure one or both of the cardiac electrode and the
lead body in subcutaneous non-intrathoracic tissue at a plurality of longitudinally spaced fixation sites of the tunnel, the
plurality of fixation elements comprising:
a first set of curved tines, each curved tine of the first set comprising a first end attached to the lead body on the electrically
insulative portion and a free end opposite the first end, each curved tine of the first set biased out of plane with respect
to a longitudinal axis of the lead body in a first orientation to curve around some of the circumference of the lead body
such that the free end points in a clockwise direction with respect to the circumference of the lead body at which the first
end is attached to the lead body to resist rotation of the lead in the clockwise direction; and
a second set of curved tines, each curved tine of the second set comprising a first end attached to the leady body on the
electrically insulative portion and a free end opposite the first end, each curved tine of the second set biased out of plane
with respect to the longitudinal axis of the lead body in a second orientation to curve around some of the circumference of
the lead body such that the free end points in a counterclockwise direction with respect to the circumference of the lead
body at which the first end is attached to the lead body to resist rotation of the lead in the counterclockwise direction.
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