Lead positioning and finned fixation system

摘要

A therapy assembly configured for at least partial insertion in a living body. At least one fixation structure is attached to the therapy delivery element proximate the electrodes. The fixation structure is configured to collapse radially inward and wrap circumferentially around the therapy delivery element to a collapsed configuration when inserted into a lumen of an introducer. The fixation structures deploy to a deployed configuration when the introducer is retracted. The fixation structure includes major surfaces generally parallel with, and extending radially outward from, a central axis of the therapy delivery element, proximal edge surface oriented toward the proximal end, and a distal edge surface oriented toward the distal end. The proximal and distal edge surfaces provide generally symmetrical resistance to displacement of the therapy delivery element within the living body in either a proximal direction or a distal direction along the central axis.

主权项

1. A therapy assembly configured for at least partial insertion in a living body, comprising:
a therapy delivery element comprising a proximal end having a plurality of electrical contacts configured to electrically couple with an implantable pulse generator and a distal end having a plurality of electrodes electrically coupled to the electrical contacts; an introducer comprising a lumen configured to receive the therapy delivery element therein; and a plurality of fixation structures attached to the therapy delivery element proximate from the electrodes, the plurality of fixation structures being configured to collapse radially inward and wrap circumferentially around the therapy delivery element into a collapsed configuration in a non-overlapping configuration when inserted into the lumen, and further being configured to deploy in a deployed configuration when the introducer is retracted from therearound, the plurality of fixation structures comprising major surfaces generally parallel with, and extending generally radially outwardly from, a central axis of the therapy delivery element, a proximal edge surface of the fixation structures being oriented towards the proximal end, a distal edge surface of the fixation structures being oriented towards the distal end; wherein the proximal and distal edge surfaces are configured to provide generally symmetrical resistance to displacement of the therapy delivery element in either a proximal direction or a distal direction along the central axis when the therapy delivery element is implanted within the living body.