Effectiveness of adaptive servo-ventilation

Figure 1 Adaptive servo-ventilation can be considered as an advanced mode of bi-level positive airway pressure. A: In response to central events, adaptive servo-ventilation increases pressure support during hypoventilation and decreases pressure support during hyperventilation, with the goal of stabilizing ventilation; B: In response to obstructive events (apneas, airflow limitation, and snoring), adaptive servo-ventilation increases expiratory positive airway pressure, with the goal of suppressing obstruction.