Patent ID: 11883152
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method of determining a contact angle between a catheter and tissue within a body, the method comprising:
emitting:
a first electrical signal from a first electrode of the catheter,
a second electrical signal from a second electrode of the catheter, and
a third electrical signal from a third electrode of the catheter;
measuring, using the first electrode, the second electrode, and the third electrode, a plurality of voltages associated with the first electrical signal, the second electrical signal, and the third electrical signal;
calculating a first interelectrode impedance based the plurality of voltages;
calculating a second interelectrode impedance based on the plurality of voltages;
for each angle of a plurality of hypothetical angles, calculating a set of a first hypothetical contact force for the angle and a second hypothetical contact force for the angle, wherein the first hypothetical contact force and the second hypothetical contact force are calculated based on the first interelectrode impedance and the second interelectrode impedance, respectively;
comparing the first hypothetical contact force and the second hypothetical contact force in each set and selecting an angle of the plurality of hypothetical angles based on closeness of first hypothetical contract force and the second hypothetical contact force to each other in the set of the selected angle;
determining the contact angle based on the selected angle and outputting a representation indicative of the contact angle.