60 patients Inclusion Criteria: * age from 18 to 70 years * Indications for mini-PCNL * ASA score: 1-3 * Single percutaneous access to pyelocaliceal system * Size of solitary calculus up to 2.5 cm Exclusion Criteria: * Active urinary tract infection * Coagulopathy * Clinically significant infravesical obstruction (Qmax less than 10 ml / s, PVR more than 50 ml)
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
To measure the level of pain in patients
Timeframe: 1 day