Kidney Stone Surgery


If a kidney stone does not move through the ureter within 30 days, surgery is considered. Urologists use several procedures to break up, remove or bypass kidney stones.
This procedure can be used to remove or break up (fragment) stones located in the ureter. A special telescopic instrument resembling a long, thin telescope (ureteroscope) is inserted through the urethra and passed through the bladder and up the ureter to the stone. Once the stone is located, the urologist either removes it with a small basket inserted through the ureteroscope (called basket extraction) or breaks up the stone with a laser or similar device. The fragments are then passed by the patient. Ureteroscopy is performed under general or regional anesthesia on an outpatient basis.



Lithotripsy to Treat Kidney Stones


This procedure is most effective for stones in the kidney or upper ureter. Lithrotripsy uses an instrument, machine, or probe to break the stone into tiny particles that can pass naturally. This procedure is not appropriate for patients with very large stones or certain other medical conditions.


Ultrasonic lithotripsy uses high frequency sound waves delivered through an electronic probe inserted into the ureter to break up the kidney stone. The fragments are passed by the patient or removed surgically.


Electrohydraulic lithotripsy (EHL) uses a flexible probe to break up small stones with shock waves generated by electricity. The probe is positioned close to the stone through a flexible ureteroscope. Fragments can be passed by the patient or extracted. EHL requires general anesthesia and can be used to break stones anywhere in the urinary system.


Extracorporeal shock wave lithotripsy (ESWL) uses highly focused impulses projected and focused from outside the body to pulverize kidney stones anywhere in the urinary system. The stone usually is reduced to sand-like granules that can be passed in the patient's urine. Large stones may require several ESWL treatments. The procedure should not generally be used for struvite stones, stones over 1 inch in diameter, or in pregnant women.
Patients undergoing lithotripsy are given a sedative and general or regional anesthesia, and the procedure takes over an hour. More than one treatment may be required.