Shock waves fragment selected stones from outside the body
Focused shock waves are directed at a visible urinary stone so smaller pieces may pass in urine. Imaging guidance and the ability to target the stone are essential.
The treatment is not automatically the least burdensome option. Dense, large or poorly positioned stones may fragment incompletely and require repeat treatment, ureteroscopy or drainage.
Ask how the team will check residual fragments and what size or location would make another approach more reliable.
Who may be considered?
Specialist review may help when the diagnosis, symptoms and previous treatment create a focused question about shock wave lithotripsy.
- A kidney or upper ureter stone visible on the planned imaging method.
- Stone size and density associated with a reasonable fragmentation rate.
- No untreated urinary infection or uncorrected bleeding risk.
- A patient able to pass fragments or receive temporary drainage when needed.
What the specialist team must confirm
Review noncontrast CT or ultrasound, stone size and Hounsfield density, skin-to-stone distance, obstruction, infection, kidney function, pregnancy possibility, anticoagulants and previous stone treatment.
Key points for this treatment

From stone mapping to confirmed clearance
A good plan includes what happens if fragments obstruct the ureter or imaging shows meaningful residual stone.
Fragment passage can take time
Blood-tinged urine, bruising and colicky discomfort may occur while fragments pass. Pain relief, hydration advice and sometimes an alpha blocker or stent plan are individualized.
Follow-up imaging should confirm whether the kidney is unobstructed and whether remaining fragments need prevention, observation or another procedure.

Risks, limits and realistic expectations
Risks include pain, bleeding around the kidney, infection, ureteral blockage by fragments, incomplete fragmentation, repeated procedures and rare kidney injury.
Fever, chills, inability to pass urine, uncontrolled flank pain, persistent vomiting or faintness after treatment requires urgent local assessment.
