Method and system for implanting self-anchoring epicardial defib

Details Method and system for implanting self-anchoring epicardial defib Method and system for implanting self-anchoring epicardial defib

1989-04-04

1991-02-12

Kamm, William E.

Surgery

Truss

Pad

128785, A61N 139

Patent

active

049915789

ABSTRACT:
A method and system for positioning a defibrillation electrode within the pericardial space of a mammal is disclosed which includes means for distending the pericardium from the heart by injecting a small volume of fluid into the pericardium. A needle having a lumen therethrough is inserted from a sub-xiphoid or other percutaneous position into the body tissue until a tip thereof punctures the distended pericardium at a selected location. A guide wire is inserted into the pericardium through the lumen of the needle, and while the guide wire remains in the pericardial space, the needle is removed. A sheath is introduced over the guide wire, with the aid of a dilator, and inserted into the tissue until one end thereof is positioned within the pericardium. The defibrillation lead, with its electrode in a retracted position, is inserted through the sheath until the electrode is likewise positioned within the pericardium, whereupon the electrode is deployed in order to make contact with a large area of tissue within the pericardium. Additional leads and electrodes may be introduced and deployed in a like manner.

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