公开(公告)号：US20240252234A1

公开(公告)日：2024-08-01

申请号：US17246768

申请日：2021-05-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Alon RAZON ,  Yotam REISNER ,  Yael PISTONOVICH ,  Alisa KOMLEVA ,  Asi ELAD ,  Gal SHLEIFER ,  Yehonatan BEN DAVID ,  Zalman IBRAGIMOV

IPC: A61B18/14 ,  A61B18/12 ,  G06N20/00

CPC classification number: A61B18/1492 ,  A61B18/1206 ,  G06N20/00 ,  A61B2018/0072 ,  A61B2018/0075 ,  A61B2018/00755 ,  A61B2018/00761 ,  A61B2018/00767 ,  A61B2018/1467 ,  A61B2560/0487

Abstract: A controller, system and method for determining whether an ablation performed by an ablation catheter creates a lesion having a depth reaching or exceeding a predetermined depth, e.g. whether the lesion is transmural. The system comprises an ablation catheter with at least two electrodes for performing an ablation on tissue. One of the electrodes is an ablation electrode and the other electrode or electrodes are reference electrodes. A processor is used to determine, e.g. in real time, whether the depth of the lesion resulting from the ablation has reached or exceeded the predetermined depth based on ablation-dependent variables. The ablation-dependent variables may comprise an electrical signal received by the ablation electrode and one or more impedance values between the electrodes. A machine learning algorithm can thus be used to classify the tissue which is being ablated. The inputs, i.e. the input data, of the machine learning algorithm are features derived from the ablation-dependent variables, wherein the features correlate with the depth of a lesion resulting from the ablation. The machine learning algorithm is adapted to output, in real time, a classification comprising an indication whether or not a depth of the lesion resulting from the ablation reaches or exceeds a predetermined depth.

公开(公告)号：US20220248977A1

公开(公告)日：2022-08-11

申请号：US17625988

申请日：2020-07-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oran GERBAT ,  Shlomo BEN HAIM ,  Asi ELAD

IPC: A61B5/06 ,  A61B5/0538 ,  A61B5/00

Abstract: Systems and methods for determining a contact angle of a catheter relative to tissue are provided. In one embodiment, a system includes a catheter with three or more electrodes, and a processor circuit in communication with the catheter. The processor circuit controls the three or more electrodes to emit a plurality of electrical voltages and to measure the plurality of electrical voltages. Based on the measured electrical voltages, the processor circuit calculates a first interelectrode impedance and a second interelectrode impedance. The processor circuit calculates, for each of a plurality of hypothetical i.e. model angles, a first hypothetical i.e. model contact force and a second hypothetical i.e. model contact force based on the first and second interelectrode impedances. The processor circuit determines and outputs the contact angle of the catheter based on a comparison of the first and second model contact forces calculated for each of the plurality of model angles.