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.

Figure 2 Several types of masks are available as an adaptive servo-ventilation interface for patients to discover a more comfortable fit: nasal masks (A), a pillow mask (B), an oro-nasal mask (C), and an optional heated humidifier connected to an adaptive servo-ventilation device (D).