Which of the following is NOT a symptom of pulmonary O2 toxicity?

Pulmonary oxygen toxicity occurs when a person is exposed to high concentrations of oxygen for an extended period, particularly under hyperbaric conditions. Symptoms can arise from the reactive oxygen species produced during elevated oxygen levels, leading to inflammatory responses in lung tissues.

Burning in the lungs, coughing, and pain in the lungs are all associated symptoms of pulmonary oxygen toxicity. These symptoms reflect irritation and damage to the lung tissues, which can occur as oxygen concentrations increase. The sensation of burning is linked to chemical irritation, while coughing is a reflex that can occur from pulmonary inflammation. Pain in the lungs can also manifest due to inflammatory processes or irritation of the pleural membranes.

Nausea, while it can be associated with various medical conditions, is not a typical symptom of pulmonary oxygen toxicity. It is more commonly attributed to other factors such as vestibular dysfunction or other systemic reactions rather than direct pulmonary irritation. Thus, the absence of nausea in the context of pulmonary oxygen toxicity highlights its distinction from other symptoms associated with the condition.