Patent ID: 9283025
Filing Date: 2016-03-15
CPC Classification: A61B

Claim Text:
1. A medical system comprising: a first electrode disposed on a catheter adapted for disposition within an internal organ; a reference electrode; an electrical power source at least interconnectable with said first electrode; a phase detection circuit configured to measure an initial phase angle value and subsequent phase angle values between said first electrode and said reference electrode; a phase shifter configured to selectively adjust said initial phase angle value between said first electrode and said reference electrode to predetermined phase angle to account for residual phase shift caused by catheter specific conditions wherein, wherein said initial phase angle value is measured while said first electrode is in a blood pool free of tissue contact; and a phase angle comparator configured to assess coupling between said first electrode and tissue by a comparison of said subsequent phase angle values measured after said initial phase angle value is measured, to said predetermined phase angle.