Evaluation of Renal Oxygenation by NIRS in Pediatric Endourologic Stone Surgery

Inclusion Criteria: * 1-18 years ASA I-III class, * Patients who will undergo RIRS, URS and Hypospadias surgeries under standard general anesthesia. * Patients whose informed consent form is approved by their parents will be included in the study. Exclusion Criteria: * Exclusio criteria were the history of renal failure, renal tumors, infection of the perirenal region; receiving colloid or blood transfusion, having abscess, body mass index (BMI) not in the normal limits (≤3% or ≥97%) * Patients whose parents do not approve the informed consent form will not be included in the study.