Shockwave Catheter System With Energy Control

A system for treating calcified lesions comprises a catheter with an elongated carrier, a sealed balloon configured to receive a liquid, and first and second electrodes positioned within the balloon. A power source, comprising a capacitor and a switch, delivers voltage pulses to the electrodes by closing the switch to discharge the capacitor. Each pulse generates an electrical arc in the liquid, creating a steam bubble and a corresponding expansion shock wave. The power source senses the current flowing across the electrodes during each pulse and terminates delivery by opening the switch once the current reaches a predetermined limit. This limit ensures arc creation while preventing excessive capacitor discharge, thereby conserving electrode material and reducing unnecessary tissue heating.