Evaluation of Continuous Negative External Pressure (cNEP) for the Treatment of Obstructive Sleep Apnea: A Pilot Study Evaluation of Continuous Negative External Pressure (cNEP) for the Treatment of Obstructive Sleep Apnea: A Pilot Study Download Change in End-Expiratory Lung Volume During Sleep in Patients at Risk for Obstructive Sleep Apnea High-Flow, Heated, Humidified Air Via Nasal Cannula Treats CPAP-Intolerant Children With Obstructive Sleep Apnea