ACTIVE FIXATION MEDICAL ELECTRICAL LEAD

摘要

A medical electrical lead and a method of its use. The lead has an elongated lead body having an outer circumference and provided with an electrode. A push tube is mounted circumferentially around the lead body and the lead body is longitudinally movable with respect thereto. A fixation helix is mounted to the push tube, extending along a generally helical axis around the outer circumference of the lead body. The lead may be employed by advancing the lead to a desired location for the fixation helix and then rotating the push tube to secure the helix to tissue. The lead body may then be moved longitudinally with respect to the push tube to place the electrode in a desirable location.

主权项

1. A medical electrical lead, comprising:
an elongated lead body having an outer circumference and provided with an electrode; a push tube, mounted circumferentially around the lead body, the lead body longitudinally movable with respect thereto; a fixation helix mounted to the push tube, extending along a generally helical axis around the outer circumference of the lead body, the fixation helix comprising a free end spaced from and extending from the lead body; and a retention mechanism employable to prevent longitudinal movement of the lead body relative to the push tube.