Demirozu M C, Chediak A D, Nay K N, Cohn M A
Sleep Disorders Center, Mount Sinai Medical Center, Miami Beach, Florida 33140.
Sleep. 1991 Jun;14(3):259-62.
Nasal continuous positive airway pressure (CPAP) "splints" the airway and prevents inspiratory collapse of the upper airway in patients with obstructive sleep apnea. Nine nasal CPAP machines were compared for their ability to maintain airway pressure at various simulated inspiratory flows. Each machine was connected to a vacuum system at 20, 40, and 60 L/min flow after it was initially set at test pressures of 5, 10, or 15 cm H2O and the system or "mask" pressures were measured. In all machines, mask pressure fell during simulated inspiration and the declines in mask pressure were as high as 5 cm H2O. Because machines varied in their ability to maintain a test pressure, it is recommended that the nasal CPAP machine used in the home be the same as that which was tested in the sleep laboratory. If a different machine is used, it may require adjustment to assure efficacy.
鼻持续气道正压通气（CPAP）可“支撑”气道，防止阻塞性睡眠呼吸暂停患者上气道在吸气时塌陷。对九台鼻CPAP机器维持不同模拟吸气流速下气道压力的能力进行了比较。每台机器在初始设定为5、10或15 cm H₂O的测试压力后，分别连接到流速为20、40和60 L/min的真空系统，并测量系统或“面罩”压力。在所有机器中，模拟吸气过程中面罩压力均下降，面罩压力下降高达5 cm H₂O。由于不同机器维持测试压力的能力存在差异，建议家庭使用的鼻CPAP机器应与在睡眠实验室测试的机器相同。如果使用不同的机器，可能需要进行调整以确保疗效。
