Lithotripter having rotatable valve for removal of electrode structure

摘要

A lithotripter is provided with an upwardly opening reflector filled with water. A valve is secured to the undersurface of the member providing the reflector. A bore extends axially through the valve body in alignment with a bore in the reflector member to accommodate an electrode assembly. A disc is mounted in the body and also has a bore aligned with the first two mentioned bores to accommodate the electrode assembly. The electrode assembly can be partially withdrawn to clear the bore in the reflector member and also the bore in the disc, but blocking the passage of water through the valve body bore. The disc is then rotated to move the valve disc out of alignment with the reflector member body to prevent further loss of water from the reflector.