Stones less than 0.5 cm in diameter are often treated conservatively. They often pass through the urinary tract spontaneously, and the likelihood of complications such as hydronephrosis from urinary obstruction is low.
NICE have summarised the indications for surgery based on size and site of renal stone/ureteric stone (1):
Stone type and size | Treatment for adults (16 years and over) | Treatment for children and young people (under 16 years) |
Ureteric stone less than 10mm | Offer SWL Consider URS if:
| Consider URS or SWL |
Ureteric stone 10 to 20mm | Offer URS Consider SWL if local facilities allow stone clearance within 4 weeks Consider PCNL for impacted proximal stones when URS has failed | Consider URS or SWL |
Notes:
Reference:
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