Granted Patent B2

US 12,653,416 · App. 18/206,284 · Granted Jun 16, 2026

Inventors: Assaf Govari (Haifa, IL); Andres Claudio Altmann (Haifa, IL); Vadim Gliner (Haifa, IL); Alon Boumendil (Givat Nili, IL)

Assignee: Biosense Webster (Israel) Ltd.

A61B5/062A61B34/20

Abstract

Claims (23)

1 . A catheter position tracking system, comprising: a patient interface unit (PIU) comprising:

an interface configured to be connected to at least one catheter and a dongle which is configured to wirelessly connect to a location pad;

and signal processing circuitry configured to process signals received from the at least one catheter;

the dongle, which is configured to augment the PIU, the dongle comprising:

a connector configured to be physically connected to the PIU;

at least three load circuits configured to receive at least three corresponding first alternating current (AC) signals from the PIU via the connector and mimic a load of at least three corresponding magnetic field generator coils of a location pad;

sampling circuitry configured to sample a current amplitude and a phase of the at least three corresponding first AC signals in the at least three load circuits;

wireless communication circuitry configured to wirelessly send data about the current amplitude and the phase of the at least three corresponding first AC signals to the location pad;

and phase synchronization circuitry configured to synchronize a phase of signals generated in the at least three corresponding magnetic field generator coils with the phase of the at least three corresponding first AC signals in the at least three load circuits

and the location pad comprising:

a driver including wireless communication circuitry configured to wirelessly receive data about the current amplitude and the phase of the at least three corresponding first AC signals from the PIU;

and a signal generator configured to generate at least three second alternating current (AC) signals having at least three corresponding different signal frequencies responsively to the data about the current amplitude and the phase of the at least three corresponding first AC signals;

and at least three magnetic field generator coils disposed at different orientations to generate at least three corresponding alternating magnetic fields in a region around the location pad responsively to the at least three second AC signals being applied to the coils.

2 . The catheter position tracking system according to claim 1 , wherein the dongle further comprises:

a clock configured to maintain a clock value and run at a clock frequency; and

clock synchronization circuitry configured to synchronize a remote clock of the driver, which is configured to be connected to the location pad, with at least one of the clock value or the clock frequency.

3 . The catheter position tracking system according to claim 1 , wherein the location pad further comprises sampling circuitry configured to sample the current amplitude and phase of the at least three second AC signals, and wherein the wireless communication circuitry is configured to wirelessly send data about the current amplitude and the phase of the at least three second AC signals to the PIU.

4 . The catheter position tracking system according to claim 3 , wherein the signal generator is configured to maintain the current amplitude of the at least three second AC signals at the current amplitude of the at least three corresponding first AC signals.

5 . The catheter position tracking system according to claim 3 , wherein the signal generator is configured to adjust the current amplitudes of the at least three second AC signals in order to maintain the at least three second AC signals at the amplitude of the at least three corresponding first AC signals.

6 . The catheter position tracking system according to claim 5 , wherein the driver further includes:

a clock configured to maintain a clock value and run at a clock frequency; and

clock synchronization circuitry configured to synchronize at least one of the clock value or the clock frequency with a remote clock disposed in the dongle.

7 . The catheter position tracking system according to claim 5 , wherein the location pad further comprises phase synchronization circuitry configured to synchronize a phase of the at least three second AC signals with a phase of at least three corresponding first AC signals.

Assignments (1)

Continuity (1)

References Cited (25)