Hybrid magnetic-based and impedance-based position sensing
AssigneeBiosense Webster, Inc.
InventorsAssaf Govari, Andres Claudio Altmann, Yitzhack Schwartz, Yaron Ephrath
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Abstract
A position sensing system includes a probe adapted to be introduced into a body cavity of a subject. The probe includes a magnetic field transducer and at least one probe electrodes. A control unit is configured to measure position coordinates of the probe using the magnetic field transducer. The control unit also measures an impedance between the at least one probe electrodes and one or more points on a body surface of the subject. Using the measured position coordinates, the control unit calibrates the measured impedance.
Claims24
A method for position sensing, comprising:
- introducing a probe comprising a magnetic field transducer and at least one probe electrode into a body cavity of a subject;
- measuring position coordinates of the probe at a location in the body cavity using the magnetic field transducer;
- measuring an impedance between the at least one probe electrode and one or more points on a body surface of the subject;
- and
- calibrating the measured impedance using the measured position coordinates.
A position sensing system, comprising:
- a probe comprising a magnetic field transducer and at least one probe electrode and adapted to be introduced into a body cavity of a subject;
- and
- a control unit configured to measure position coordinates of the probe using the magnetic field transducer, and to measure an impedance between the at least one probe electrode and one or more points on a body surface of the subject, and to calibrate the measured impedance using the measured position coordinates.
Dependencies are inferred from the claim text.