An invasive lithotripter probe system comprising: an invasive lithotripter tip for use with a lithotripter probe, the lithotripter tip comprising: a first conic electrode positioned at a distal end of the lithotripter tip; and a second conic electrode, an end of which is coaxially aligned with an end of the first conic electrode; and an electrical source (400, 500) configured to charge the first conic electrode to a first polarity, the electrical source comprising a two-electrode spark gap triggering system; wherein the first and second conic electrodes are positioned on the lithotripter tip such that an electric arc between the ends of the first and second conic electrodes causes a shockwave that is toroid shaped to radiate from the lithotripter tip, wherein the two-electrode spark gap triggering system comprises: a first spark gap (402, 502); a second spark gap (404, 504) electrically connected in series with the first spark gap; and a storage capacitor electrically connected in parallel with the first (402, 502) and second spark gaps (404, 504); wherein the first conic electrode is electrically connected to the storage capacitor via the serially connected first and second spark gaps; and wherein when the first and second spark gaps conduct, the storage capacitor is configured to discharge to the first conic electrode, thereby causing the electric arc between the ends of the first and second conic electrodes wherein the lithotripter tip is at least partially surrounded by a flexible encapsulating member, and wherein the flexible encapsulating member defines a channel configured to receive a liquid for insertion into the flexible encapsulating member, and comprising a one-way valve configured to prevent the liquid from being extracted from the flexible encapsulating member through the channel. a first conic electrode positioned at a distal end of the lithotripter tip; and a second conic electrode, an end of which is coaxially aligned with an end of the first conic electrode; and an electrical source (400, 500) configured to charge the first conic electrode to a first polarity, the electrical source comprising a two-electrode spark gap triggering system; wherein the first and second conic electrodes are positioned on the lithotripter tip such that an electric arc between the ends of the first and second conic electrodes causes a shockwave that is toroid shaped to radiate from the lithotripter tip, wherein the two-electrode spark gap triggering system comprises: a first spark gap (402, 502); a second spark gap (404, 504) electrically connected in series with the first spark gap; and a storage capacitor electrically connected in parallel with the first (402, 502) and second spark gaps (404, 504); wherein the first conic electrode is electrically connected to the storage capacitor via the serially connected first and second spark gaps; and wherein when the first and second spark gaps conduct, the storage capacitor is configured to discharge to the first conic electrode, thereby causing the electric arc between the ends of the first and second conic electrodes wherein the lithotripter tip is at least partially surrounded by a flexible encapsulating member, and wherein the flexible encapsulating member defines a channel configured to receive a liquid for insertion into the flexible encapsulating member, and comprising a one-way valve configured to prevent the liquid from being extracted from the flexible encapsulating member through the channel. a first spark gap (402, 502); a second spark gap (404, 504) electrically connected in series with the first spark gap; and a storage capacitor electrically connected in parallel with the first (402, 502) and second spark gaps (404, 504); wherein the first conic electrode is electrically connected to the storage capacitor via the serially connected first and second spark gaps; and wherein when the first and second spark gaps conduct, the storage capacitor is configured to discharge to the first conic electrode, thereby causing the electric arc between the ends of the first and second conic electrodes wherein the lithotripter tip is at least partially surrounded by a flexible encapsulating member, and wherein the flexible encapsulating member defines a channel configured to receive a liquid for insertion into the flexible encapsulating member, and comprising a one-way valve configured to prevent the liquid from being extracted from the flexible encapsulating member through the channel.