A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/04 (2006.01) A61B 5/042 (2006.01) A61B 18/12 (2006.01) A61B 18/14 (2006.01) A61N 1/05 (2006.01) A61B 17/00 (2006.01)
Patent
CA 2109793
2109793 9221285 PCTABS00017 A combination catheter for both detecting monophasic action potentials and ablating surface tissue in an in vivo heart of a patient is provided. The apparatus includes a catheter probe having a terminal tip portion (10) and an electrode (20) carried on the tip such that a portion of the tip electrode (20) is exposed to ambient. A reference electrode (50) is spaced along the tip from the first electrode for supplying a reference potential signal. An ablating electrode (30) is located adjacent to but electrically insulated from both the tip (20) and reference (50) electrodes for providing electromagnetic energy to the tip. The electrodes are electrically connected to the proximal end of the catheter through individual conductors or wires (22, 32, and 50) that run through an insulated cable. An electronic filter is provided to permit the recording of MAPs during ablation without radiofrequency interference. The catheter may also include standard mapping and/or pacing electrodes (80 and 75) respectively. The catheter may further include a steering mechanism for positioning the catheter at various treatment sites in the heart, and a structure for holding the tip electrode in substantially perpendicular contact with heart tissue with a positive pressure, and for spacing the reference electrode from the heart tissue.
Edwards Stuart D.
Franz Michael R.
Stern Roger A.
Thompson Russell B.
Ep Technologies Inc.
Smart & Biggar
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