What is a potential consequence of oxygen toxicity?

Oxygen toxicity occurs when a patient is exposed to high levels of oxygen for extended periods, particularly at higher pressures, such as in hyperbaric oxygen therapy or in patients receiving long-term supplemental oxygen. One significant consequence of this condition is hypoventilation, which is a reduction in breathing rate and depth. This can lead to inadequate gas exchange and hypoxemia (low oxygen levels in the blood). Consequently, when hypoventilation becomes severe, it can result in loss of consciousness due to a critical drop in oxygen levels reaching the brain.

In contrast to the other responses, the correct answer highlights a serious complication associated with excessive oxygen exposure. Increased heart rate can occur due to various stressors and isn't directly linked specifically to oxygen toxicity alone. Improved lung function and enhanced respiratory drive generally describe beneficial responses to oxygen therapy, contrasting with the harmful effects of oxygen toxicity, thus making them unlikely outcomes in this context.