Partial resolution of airflow obstruction during continuous positive airway pressure (CPAP) titration

Polysomnogram for CPAP titration in an obese child during REM sleep. In this 30-second epoch, the CPAP has been titrated to a pressure that eliminates complete apneas. However, partial obstruction continues, indicated by tachypnea (respiratory rate 26) and paradoxical respiratory movements (CHEST and ABD tracings are not synchronous). Higher CPAP pressures may be attempted to overcome the partial obstruction.