Patent ID: 9345540
Filing Date: 2016-05-24
CPC Classification: A61B

Claim Text:
1. A method of ablating a target tissue region, comprising: positioning a medical device having an expandable element proximate the target tissue region, the expandable element including a first plurality of electrodes coupled to a distal portion of the expandable element, and a second plurality of electrodes coupled to a proximal portion of the expandable element; transmitting unipolar radiofrequency energy from the first plurality of electrodes and simultaneously transmitting bipolar radiofrequency energy from the second plurality of electrodes; measuring an impedance from each electrode of the first plurality of electrodes; measuring an impedance from each electrode of the second plurality of electrodes; comparing the measured impedance from each electrode of the first plurality of electrodes and the second plurality of electrodes; identifying areas of tissue that are in contact with at least some of the first plurality of electrodes and the second plurality of electrodes based on the comparison; and activating the at least some of the first plurality of electrodes and the second plurality of electrodes that are in contact with the tissue to ablate the tissue.