This danger is avoided by raising the point of the lithotrite immediately after grasping the stone and before crushing.
Care must be taken not to catch the bladder-wall with the lithotrite.
But it is well known that they sometimes defy all lithotrite instruments, and compel us to have recourse to the knife.
The lithotrite has two blades, a “male” and a “female,” the latter fenestrated, the former solid with its surface notched.
lithotrite lith·o·trite (lĭth'ə-trīt')
An instrument used to crush a stone present in the bladder or urethra. Also called lithoclast.