Hypercapnia targeting CO2 50-70 mm Hg was associated with increased cardiac output, central venous O2, and arterial O2 tension in patients undergoing video-assisted thoracoscopic patent ductus arteriosus closure using one-lung ventilation without any deleterious cardiopulmonary effects.

A small infant with congenital cystic adenomatoid was scheduled for thoracoscopic resection of the lung cyst. During carbon dioxide insufflation, there was a sharp rise of endtidal carbon dioxide which was followed by marked hypoxemia and bradycardia due to occlusion of the tracheal tube with blood. The plan changed to open thoracotomy and total pneumonectomy. Despite several reports, which addressed successful thoracoscopic cystic lung resection, its safety remain to be determined.

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