Remote spark shock wave generator

摘要

Apparatus is provided for the extracorporeal destruction of kidney stones, and includes an ellipsoidal reflector. The reflector has a first focus point, and a second focus point, the reflector being truncated and the second focus point being disposed beyond the resulting open end of the reflector for coincidence with a kidney stone or the like. An extension from the apex of the reflector has a cavity with a spark gap therein. The cavity opens into the reflector, and the cavity and reflector are filled with liquid such as water. A spark produced across the spark gap produces a shock wave which moves to the first focus point of the reflector and is reflected to the second focus point.