Quality of Ventilation With Facial Versus Nasal Mask vs Nasal Mask Anesthesia in Children 3 to 12 Years Old

Patients in group 1 undergo ventilation with an anatomical facial mask and 100% oxygen for three minutes. Patients in group 2 undergo ventilation with a nasal mask and 100% oxygen for three minutes. In both groups, ventilation will be performed with the controlled mode of the anesthesia machine with a volume of 8 cc/kg and a speed of 12-20/min.