Assessment of Electrode Coupling for Tissue Ablation
First Claim
1. A medical system comprisinga first electrode;
- an electrical power source at least interconnectable with said first electrode; and
a phase angle comparator configured to assess coupling between said first electrode and tissue by a comparison of phase angle values.
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Accused Products
Abstract
An electrode catheter and a method for assessing electrode-tissue contact and coupling are disclosed. An exemplary electrode catheter comprises an electrode adapted to apply electrical energy. A measurement circuit is adapted to measure impedance between the electrode and ground as the electrode approaches a target tissue. A processor determines a contact and coupling condition for the target tissue based at least in part on reactance of the impedance measured by the measurement circuit. In another exemplary embodiment, the electrode catheter determines the contact and coupling condition based at least in part on a phase angle of the impedance.
94 Citations
17 Claims
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1. A medical system comprising
a first electrode; -
an electrical power source at least interconnectable with said first electrode; and a phase angle comparator configured to assess coupling between said first electrode and tissue by a comparison of phase angle values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical system comprising
a first electrode; -
an electrical power source at least interconnectable with said first electrode; and a reactance comparator configured to assess coupling between said first electrode and tissue by a comparison of reactance values. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A medical system comprising
an electrode; -
an electrical power source at least interconnectable with said electrode; and an impedance components ratio comparator configured to assess coupling between said electrode and a tissue by comparing a ratio of two components of an impedance to at least one benchmark value of an impedance components ratio.
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Specification