A nurse is collecting data from a client who uses a continuous positive airway pressure (CPAP) machine at night for sleep apnea. The nurse should identify which of the following findings as an indication of proper CPAP use?

A. There is one finger width between the strap on the mask and the client's face is correct. A properly fitted CPAP mask should have a snug fit, with a space of about one finger width between the strap and the face to ensure adequate seal and comfort. A mask that is too tight can cause discomfort, while a loose mask may not provide the necessary pressure to treat sleep apnea. B. The therapeutic dose of albuterol is being inhaled is incorrect. Albuterol is used for bronchodilation in conditions like asthma, but it is not related to CPAP use. CPAP is designed to provide positive pressure to keep the airways open, not to treat asthma or other respiratory issues directly. C. The mask fits loosely so air can escape from underneath is incorrect. A loose fit would lead to air leakage, reducing the effectiveness of the CPAP therapy. The mask should fit securely to ensure the proper amount of air pressure is delivered during sleep. D. The mask is secured over the client's mouth and the client's nose is uncovered is incorrect. For effective CPAP therapy, the mask should cover both the nose and mouth, unless the client specifically uses a nasal CPAP mask designed to deliver pressure only through the nose.