#$%^&*AU2016216555A120170406.pdf#####ABSTRACT Ablation apparatus is provided. The apparatus includes an insertion tube, an ablation electrode disposed at a distal end of the tube, a conducting element, and a sensor. 5 The conducting element conducts an ablating current from a proximal end of the tube to the ablation electrode, and the sensor measures an amplitude of the ablating current at the distal end of the tube. Other embodiments are also described.1/4 co .0 --t C 3 -D CNt
