System and method for detecting electrode-tissue contact

Details System and method for detecting electrode-tissue contact System and method for detecting electrode-tissue contact

A - Human Necessities

61

M

A61M 25/095 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2352681

A system for detecting electrode-tissue contact comprises a catheter having a location sensor and a distal tip electrode. The catheter preferably further comprises a reference electrode that is preferably protected from making contact with tissue. The system further comprises a signal generator to transmit test signals to the distal tip and reference electrodes. Tissue contact is detected by comparing the signals across the tip electrode to a return electrode versus the signal across the reference electrode to a return electrode. Ablation energy may be delivered to the distal tip electrode if contact of the electrode with tissue is detected.

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