EXTRACORPOREAL SHOCKWAVE LITHOTRIPSY (ESWL)

ESWL is a procedure that uses high-energy shockwaves to break down kidney stones into crystals small enough to be passed out in your urine.
Kidney stones are small, solid masses that form when salts or minerals normally found in urine become solid crystals inside the kidney. Usually, the crystals are very small and pass harmlessly out of your body. But if they build up inside your kidney, they can cause pain, infection and damage your kidney function. Sometimes smaller kidney stones move out of the kidneys into the tubes that carry urine from your kidneys to the bladder (ureters). They can cause severe pain if they rub against or get stuck in the ureters.
The Procedure

Lithotripsy takes about 20 to 30 minutes. Usually only one kidney is treated per session.
You will be asked to lie down on a couch. Ultrasound is used to pinpoint the exact position of the kidney stone(s). Gel is smeared on your skin to get good contact with the lithotripter sensor. The sensor focuses the shockwaves precisely onto each stone. The intensity of the shockwaves is increased gradually. Try not to make any movements during the treatment, otherwise the kidney stone may move out of focus. Although the shockwaves don't hurt, you may feel an unusual and uncomfortable sensation as the stone is broken up.

How long do I have to be hospitalized?

Lithotripsy is routinely done as an out-patient or day case procedure.

Recovery and Recuperation

You will need pain relief to help with any discomfort. Your nurse will give you a date for a follow-up appointment and ask you to pass urine before you go home. It's sensible to take it easy for the rest of the day. Drink plenty of clear fluids over 48 hours to help flush the kidney stone fragments out of your urinary system. Most people feel able to resume normal activities on the following day.

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