Biosense Webster (israel) Ltd.

The University of Oklahoma

Biosense Webster, Inc.

Assaf Rubissa

Meir Bar-Tal

Hiroshi Nakagawa

Avri Hazan

Abraham Berger

Alaa Zoubi

Yigal Ultchin

Erez Silberschein

Garth Francis Constantine

Morris Ziv-Ari

Shiran Eliyahu

Described embodiments include a system that includes a current source generator and a processor. The processor is configured to drive the current source generator to supply, for application to tissue of a subject, an electric current having an amplitude that varies in accordance with a predefined function of time, such that the amplitude initially monotonically increases to a maximum value. Other embodiments are also described.

Using a predetermined ablation-current profile

A method, consisting of ablating tissue for a time period, measuring a contact force applied during the time period, and measuring a power used during the time period. The method further includes ceasing ablating the tissue when a desired size of a lesion produced in the tissue, as estimated using an integral over the time period of a product of the contact force raised to a first non-unity exponent and the power raised to a second non-unity exponent, is reached.

Estimation of lesion size

A method for treatment evaluation includes applying energy through a probe to ablate tissue at a plurality of sites in an organ in a body of a patient, thereby creating lesions in the tissue including at least first and second lesions at respective first and second, mutually-adjacent sites. Location coordinates and respective treatment parameters are recorded at each of the sites with respect to the applied energy. Based on the recorded treatment parameters, respective measures of size of the lesions are computed, including at least respective first and second measures of the first and second lesions. An indication of contiguity between at least the first and second lesions is generated responsively to the first and second measures and to a distance between the location coordinates of the first and second sites.

Ablation line contiguity index

Growing community of inventors

Misgav, Israel

Assaf Rubissa