Degassification of water in hydraulic spark gap shock wave generator

摘要

Kidney stones are disintegrated by extracorporeal apparatus generated shock waves. A reflector open at one end, has a liquid such as water therein and a resilient disphragm across the open end of the reflector. A spark gap is provided in the reflector, and a spark across this gap generates a shock wave and produces gas in the liquid. A flexible enclosure within the reflector about the spark gap isolates the spark gap from most of the liquid in the reflector. Gas formed as an incident to discharging a spark across the gap is removed from this enclosure.