Certified Polysomnographic Technician (CPSGT) Practice Exam 2025 - Free CPSGT Practice Questions and Study Guide

In the context of bilevel titration, the term that is sometimes used to treat central apneas is the backup rate. Central apneas occur when there is a failure of the brain to send appropriate signals to the muscles that control breathing, leading to a pause in breathing.

During bilevel positive airway pressure (BiPAP) therapy, the backup rate is a feature that allows the device to automatically deliver a set number of breaths per minute if the patient does not initiate a breath on their own. This mechanism ensures that the patient continues to receive ventilation and minimizes the risk of prolonged apneas, thus providing a safety net for patients experiencing central apneas.

The other terms have their applications; for instance, pressure support refers to the level of pressure provided to assist inhalation but does not directly address the frequency of breaths. Tidal volume pertains to the amount of air displaced during one breathing cycle, which is a factor in overall ventilation but not specific to the prevention of central apneas. IPAP (Inspiratory Positive Airway Pressure) indicates the pressure delivered during inhalation but, like pressure support, does not inherently address the issue of breath timing, which is crucial in managing central apneas.