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This study was designed to determine whether a decrease in renal oxygenation occurs during CO₂ pneumoperitoneum in children with normal renal function undergoing laparoscopy.

Near infrared spectroscopy (NIRS) probes were applied to both the lateral flank (T10-L2) and lateral cerebral area of all patients with normal renal function undergoing a laparoscopic procedure. Information was recorded in 5-s intervals for 15-min before, during, and for 15-min after pneumoperitoneum insufflation and desufflation. Simultaneously, additional hemodynamic parameters (arterial saturation, mean arterial pressure, end tidal CO₂, and urine output) were recorded every 5-min. Pneumoperitoneum pressures used were: 0–1 month old, <6 mmHg; 2–12 months old, <8 mmHg; 1–2 years old, <10 mmHg, and 2–8 years old, <12 mmHg. The lowest …