Which of the following is NOT a use of overnight pulse oximetry?

Overnight pulse oximetry is primarily utilized for monitoring and assessing various conditions related to oxygen saturation during sleep. The correct response highlights that evaluating daytime pulmonary function is not one of its intended uses.

The role of overnight pulse oximetry includes identifying obstructive sleep apnea since it can highlight significant drops in oxygen saturation associated with apneic events. Additionally, it is effective in monitoring nocturnal hypoxemia, as it captures fluctuations in oxygen levels while a patient is asleep. Another essential use is assessing oxygen levels during sleep, providing crucial data on how well a patient maintains adequate oxygenation in a non-wakeful state.

Evaluation of daytime pulmonary function involves assessing parameters like forced vital capacity and forced expiratory volume, which are typically performed through spirometry and other pulmonary function tests, rather than through overnight pulse oximetry. Thus, this option correctly indicates a scenario that falls outside the typical applications of pulse oximetry in a sleep setting.