Which ventilator mode is most suitable to help recruit alveoli?

The mode that is most suitable for recruiting alveoli is APRV (Airway Pressure Release Ventilation). APRV is a unique mode that allows for prolonged inflation (or pressure) phases to maintain open alveoli, facilitating recruitment while enabling spontaneous breathing.

In APRV, higher than normal pressures are maintained for an extended period during the inspiratory phase, which helps to open collapsed or fluid-filled alveoli, enhancing gas exchange and improving lung compliance. This mode is particularly beneficial in patients with conditions like Acute Respiratory Distress Syndrome (ARDS), where alveolar recruitment is critical for effective ventilation and oxygenation.

Various other modes, such as PRVC (Pressure Regulated Volume Control) and PCV (Pressure Control Ventilation), can assist in providing adequate ventilation but do not specifically emphasize recruiting collapsed alveoli in the same manner as APRV. Inverse positive pressure ventilation tends to use longer inspiratory times, which may not be as effective as APRV in recruiting alveoli.

Overall, the advantages of APRV for alveolar recruitment make it the preferred choice among the given options.