Study of Exhaled Nitric Oxide in Subjects with Suspected Obstructive Sleep Apnea: A Pilot Study in Vietnam

Figure 1

Post-PSG multiflow exhaled NO profile in two AHI groups. Note: the graph represents the mean (95% CI) of post-PSG NO production rate (VNO = FENO × Ex. flow), measured at 4 different levels of expiratory flow (50, 100, 150, and 350 mL/s). The J’awNO and CANO can be determined using the simple linear approach by Tsoukias and George [13]: VNO = J’awNO + CANO × Ex. flow. value: significance of difference between healthy subjects (AHI < 5, circle point and dotted line) and patients with OSA (AHI ≥ 5, square point and continuous line).