Surgery – Instruments – Electrical application
Patent
1996-03-29
1998-07-14
Bahr, Jennifer
Surgery
Instruments
Electrical application
606 45, 606 49, 607122, A61N 100
Patent
active
057796998
ABSTRACT:
An RF ablation catheter of the type comprising a flexible elongate catheter body having at least one lumen therethrough and having a proximal handle end and a distal end section adapted to be introduced into a heart chamber, at least one electrical conductor extending from the handle to the distal tip section within the at least one lumen for conduction RF energy, and a distal tip electrode coupled to the distal end section of the catheter body and electrically coupled with the at least one electrical conductor. The distal tip electrode is formed with a slip resistant, field focusing exterior contour for maintaining a position of the distal tip electrode bearing against the endocardium of the patient's heart, without penetrating the myocardium thereof, achieved through manipulation of the catheter distal tip section, and focusing ablation energy into the endocardium. The distal tip electrode is formed of a generally cylindrical, electrically conductive, electrode body having a hemispheric end and a tubular side wall at the distal end of the catheter body, and the exterior contour providing means further comprises a plurality of depressions formed by bores or annular or spiral or longitudinally elongated grooves formed in the hemispheric end and/or side wall. The exterior contour additionally assists in cooling the distal tip electrode.
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Bahr Jennifer
Duthler Reed A.
Huane Stephen
Medtronic Inc.
Patton Harold R.
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