What could be an indicator of adequate CPAP pressure during a sleep study?

An indicator of adequate CPAP (Continuous Positive Airway Pressure) pressure during a sleep study is the absence of recorded apneas. CPAP therapy is designed to keep the airway open by providing a continuous stream of air, which helps to prevent airway obstructions that lead to apneas. If there are no recorded apneas during the study, it suggests that the CPAP pressure being used is effectively maintaining airway patency, thereby allowing for normal breathing throughout the night.

In contrast, experiencing nightmares, increased respiratory effort, or decreased oxygen saturation would suggest problems with the effectiveness of the therapy. Nightmares can be a side effect or a psychological response rather than an indicator of pressure adequacy. Increased respiratory effort may indicate that the patient is still struggling to breathe against an obstructed airway or insufficient pressure settings. Decreased oxygen saturation would also imply that airway obstruction is occurring, perhaps because the CPAP pressure is inadequate, leading to intermittent hypoxia during sleep. Thus, the absence of apneas is a clear and direct indicator of effective CPAP therapy, confirming that the pressure is sufficient for maintaining airway openness.