Endotracheal tube and Ambu bag

This infant in the pediatric intensive care unit has an endotracheal tube to assist with breathing. The nurse on the left is using a stethoscope to auscultate the breath sounds in the infant’s right lung. The other nurse is squeezing a blue Ambu bag to breathe for the infant until the endotracheal tube is reconnected to the ventilator. The left chest is bandaged where a chest tube was inserted, and the yellow drainage tube for the chest tube is at the bottom right. The infant’s pink skin color shows that the level of oxygen in the blood is adequate because of treatment with the ventilator and