TISSUE CONTACT SENSING USING A MEDICAL DEVICE

摘要

Medical devices and methods for making and using medical devices are disclosed. An example system for sensing tissue contact is disclosed. The system comprises a catheter shaft including a distal end portion. The distal end portion includes a sensing assembly having a plurality of electrodes. The plurality of electrodes includes a current-carrying electrode, a first sensing electrode and a second sensing electrode. The first sensing electrode is positioned a first distance from the current-carrying electrode. The second sensing electrode is positioned a second distance from the current-carrying electrode and the first distance is different from the second distance. The system also includes a controller coupled to the plurality of mapping electrodes. The controller is capable of calculating a parameter based at least in part on the first and the second distances.

主权项

1. An electrophysiology medical device, comprising:
a catheter shaft including a distal end portion, wherein the distal end portion includes a sensing assembly having a plurality of mapping electrodes; wherein the plurality of mapping electrodes includes at least one current-carrying electrode, a first sensing electrode and a second sensing electrode; wherein the first sensing electrode is spaced from the current-carrying electrode a first distance; wherein the second sensing electrode is spaced from the current-carrying electrode a second distance; wherein the first distance is different from the second distance; and a controller coupled to the plurality of mapping electrodes; wherein the controller is capable of calculating a parameter based at least in part on the first and the second distances.