During bilevel titration, which setting is used to address central apneas?

During bilevel titration, which setting is used to address central apneas?

• A. IPAP
• B. Rise time
• C. EPAP
• D. Backup rate

Answer: (C)

Central apneas happen when the brain doesn’t send regular breaths, so simply increasing pressure during exhalation doesn’t fix the problem. In bilevel titration, EPAP mainly keeps the airway open and prevents obstructive events, but it doesn’t ensure ventilation when there’s no respiratory effort. The way to counter central apneas is to use a backup rate, which provides a minimum number of breaths per minute if the patient does not trigger a breath. This keeps ventilation steady during apneas. Rise time changes how quickly the machine switches between pressures, and IPAP boosts inspiratory pressure for ventilation, but neither directly guarantees breaths in the absence of drive like a backup rate does.

Central apneas happen when the brain doesn’t send regular breaths, so simply increasing pressure during exhalation doesn’t fix the problem. In bilevel titration, EPAP mainly keeps the airway open and prevents obstructive events, but it doesn’t ensure ventilation when there’s no respiratory effort. The way to counter central apneas is to use a backup rate, which provides a minimum number of breaths per minute if the patient does not trigger a breath. This keeps ventilation steady during apneas. Rise time changes how quickly the machine switches between pressures, and IPAP boosts inspiratory pressure for ventilation, but neither directly guarantees breaths in the absence of drive like a backup rate does.