Different Low Flow Rates on Gas Exchange in Children During Apnea

After induction, bag-mask ventilation with 100% oxygen and flow rates of 6 L/ min will be carried out until the expired oxygen concentration will be \>90%, saturation of oxygen was 100%, and end tidal carbon dioxide was 30-40 mmHg. Once this will be reached, bag-mask ventilation will be stopped and apneic oxygenation will be initiated for 3 minutes