Lyon & Lyon LLP
Systems and methods for assessing stability of an operative instrument inside a body region
 Systems and methods sense the stability of an operative instrument, e.g., an ablation electrode, inside a body region. An electrical field is established inside the body region between an electrical energy transmitting electrode and an electrical reference. A tracking electrode is placed in the electrical field spaced from the energy transmitting electrode. One of the tracking electrode and the energy transmitting electrode is carried by the operative instrument. An output is generated, which varies according to the degree the operative instrument moves in the electric field, based, at least in part upon a variation in voltage amplitudes sensed by the tracking electrode over time. 
Scimed Life Systems, Inc.
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inventional additional inventional additional
Dorin
Panescu