| 摘要 |
<p>A body-implantable, intravascular lead affixed with a pin or pins at its proximal end adapted to be connected to pulse generator and with an electrode or electrodes at its distal end adapted to be securely and permanently attached to a body organ through endothelial tissue. An electrode in the form of a rigid, electrically conductive helix with a sharp tip at the distal end of the lead is adapted to be screwed through endothelial tissue into the body organ. To allow the insertion and guidance of the lead through a body vessel without snagging the body vessel, the lead carries a a sleeve shrouding the helix during introduction of the lead that retracts as the corkscrew electrode is screwed into the organ and re-expands to cover the helix in the event that the helix is unscrewed and withdrawn.</p> |
