Biosense Webster (Israel)

A medical apparatus includes a probe, which includes an insertion tube configured for insertion into a body cavity of a patient, and a distal assembly, which is connected distally to the insertion tube and includes a plurality of electrodes, which are configured to contact tissue within the body cavity. The apparatus further includes an electrical signal generator, which is configured to apply electrical pulses to a group of two or more of the electrodes with an amplitude sufficient to irreversibly electroporate the tissue contacted by the electrodes in the group, and a controller, which is coupled to measure a change in an electrical impedance between an electrode in the group and a further electrode as a result of application of the electrical pulses and to output a measure of ablation of the tissue responsively to the measured change in the electrical impedance.

A guiding sheath assembly has an elongated shaft, and a control handle with a control knob and a shuttle configured for translation in response to manipulation of the control knob. The assembly includes a puller wire extending along the shaft and responsive to translation of the shuttle to deflect the shaft. The puller wire has a stop at its proximal end wherein a deflection sensor is affixed to stop subject to compression between to generate a signal in response to distortion between the first shuttle and the first stop. A catheter having a control handle and a control knob for manipulation of a deflection puller wire whose proximal end is affixed to a stop anchored in the control handle housing includes a strain gauge affixed to the stop configured to detect deformation resulting from actuation of the puller wire in deflecting the catheter shaft. A drip chamber.

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