Can an assistant doctor do gravel alone?

You can't. Lithotripsy must be an attending physician with experience in lithotripsy, and an assistant physician cannot operate independently, but can complete or assist the superior physician to complete the treatment under the guidance of the superior physician. Lithotripsy in kidney calculi mainly includes percutaneous nephrolithotomy, ureteroscopic lithotripsy and extracorporeal shock wave lithotripsy.