Ultrasonic aspiration of prostate, bladder tumors, and stones. Progress report.

The projected advantages of ultrasonic surgery on prostate, bladder tumors, and stones are: (1) precise histologic diagnosis without microscopic distortion as occurs with electrocautery; (2) continuous uninterrupted surgery; (3) improved hemostasis; (4) protection of external sphincter; (5) easy surgical technique to learn; (6) adaptability for video TUR; (7) can remove bladder stones and perform TURP at one sitting; (8) no fear of bladder wall injury during lithotripsy since stone is sucked to aspirator for dissolution; (9) no electrical burns or obturator reflex since electricity is not used to resect.