[Percutaneous nephrostomy under ultrasound guidance as a prerequisite for percutaneous nephroureterolithotomy (PNL)].
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008096:Lithotripsy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009403:Nephrostomy, Percutaneous / Q000379:methods*; D014545:Urinary Calculi / Q000628:therapy*