Prone Versus Prone-Flexed Position For Percutaneous Nephrolithotomy (PCNL)

Prone Versus Prone-Flexed Position For Percutaneous Nephrolithotomy (PCNL) Comparing Efficacy and Complication According to Clavien-Dindo Classification Score Randomised Controlled Study

compare the prone with the prone-flexed position accessibility of upper and middle calyceal approach by subcostal puncture and PCNL reporting complications using the Clavien-Dindo system with Categorisation of PCNL-specific complications according to Clavien-Dindo classification score

Inclusion Criteria:

• Large renal pelvic stone
• Upper calyceal stone
• Middle calyceal stone

Exclusion Criteria:

• lower calyceal stone
• Bilateral simultaneous PCNL
• Need for 3 percutaneous tracts intraoperative
• Morbid obesity (BMI >40)
• Non opaque renal stones.
• Refuse to complete study requirements