C.6. The surgeon returned the intrathoracic stomach and intestine to the peritoneal cavity, and the ipsilateral lung was found to be hypoplastic and collapsed. Attempts were made to manually expand the collapsed lung with positive airway pressure. Five minutes after the abdomen was closed, the blood pressure suddenly decreased from 70/40 mm Hg to 30/20 mm Hg, the heart rate decreased from 150 to 80 beats per minute, and the Spo2 decreased from 95% to 60%. What would you immediately do? i