Spontaneous tension pneumothorax and CO₂ narcosis in a near fatal episode of chronic obstructive pulmonary disease exacerbation.

Exacerbation of chronic obstructive pulmonary disease (COPD) is a disease pattern frequently seen in emergency medical services and intensive care units. Usually, exacerbations of COPD are of infectious origin, and an acute vital threat may take several days to develop. Tension pneumothorax in patients with COPD is a rare and often unexpected cause of acute vital threat. To the best of our knowledge, this is a unique case of CO2 narcosis after spontaneous tension pneumothorax in a patient with COPD. We describe the rapid development of respiratory insufficiency and near fatal pulmonary failure in a 65-year-old female patient with COPD due to spontaneous tension pneumothorax. The patient was in respiratory failure and comatose upon arrival of the emergency service. Before mechanical ventilation, coma could be confirmed to be due to CO2 narcosis caused by exorbitant arterial hypercapnia (PCO2, 193 mm Hg). Pneumothorax was diagnosed in the hospital by chest x-ray and resolved after pleural drainage. The patient could be extubated early and discharged without sequelae. In conclusion, we want to report the occurrence of a tension pneumothorax as an important and potentially overseen condition in patients with COPD with acute respiratory failure.