Patent ID: 11883106
Assignee: ST. JUDE MEDICAL, CARDIOLOGY DIVISION, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A system, comprising:
an electronic control unit (ECU) configured to:
receive or determine a measure of energy applied from an electrode to tissue of a patient;
receive or determine a measure of an impedance between the electrode and the tissue;
receive or determine a measure of contact force between the electrode and the tissue;
calculate a ratio of the measure of impedance to the measure of contact force, where the measure of impedance is the denominator and the measure of contact force is the numerator, wherein the impedance is a complex impedance and the ECU is further configured to calculate the denominator of the ratio based on at least a reactance and a resistance of the complex impedance, or a magnitude and a phase angle of the complex impedance;
calculate a size of a lesion in the tissue according to the measure of energy applied and the ratio of the measure of impedance to the measure of contact force; and
display lesion size to a clinician.