lithotresis

lith·o·tre·sis

(lith'ō-trē'sis),
The boring of holes in a calculus to facilitate its crushing.
[litho- + G. trēsis, a boring]

lithotresis

(lith″ŏ-trē′sĭs) [ litho- + Gr. trēsis, perforation]
The drilling or boring of holes in a calculus to facilitate crushing. Ultrasonic probes are now employed.