Comparison of Ultra-mini PCNL and Micro PCNL

Inclusion Criteria: * Patients who are planned to undergo PCNL due to kidney stone * Patients with a kidney stone \< 2 cm * Patients between 18 and 65 years old Exclusion Criteria: * Patients with unregulated diabetes mellitus and diabetic nephropathy * Patients with a blood pressure higher than 140/80 mmHg despite use of antihypertensive drug(s) regularly * Patients with chronic renal failure who need dialysis * Patients who had prerenal, renal or postrenal acute kidney failure during the last 6 months * Patients who had acute pyelonephritis during the last 6 months * Patients younger than 18 years old or older than 65 years old * Patients who had kidney surgery during the last 3 months and who have abnormal kidney functions * Patients with ureteral stone who are planned to undergo endoscopic stone treatment at the same time * Patients with a history of corticosteroid use during enrollment into the study or previous 3 months * Patients with uncontrolled thyroid disease * Patients who have a disease with rapid cell turn-over (like leukemia, lymphoma, etc.) * Patients whose operation terminated or converted to open surgery due to any reason * Patients with missing data