A method of a device detects(detecting) a respiratory effort-related arousal in a respiratory airflow signal of a patient. The method may include computing a measure of consistency of inspiratory flow limitation over a plurality of recent breaths from the signal. The method may further include computing a measure of step change in ventilation indicating a sudden big breath. The method may further include computing a measure indicating a degree of confidence of occurrence of a respiratory effort-related arousal from the measure of consistency of inspiratory flow limitation and the measure of the step change in ventilation.一種利用器件以檢測患者呼吸氣流信號中的睡眠呼吸阻力相關微覺醒之方法。該方法可包括從該信號計算有關複數個最近呼吸的一致性吸氣流限測定。該方法可更包括計算指出突然大呼吸的換氣階段變化測定。該方法可更包括從該一致性吸氣流限測定與該換氣階段變化測定，以計算指出發生睡眠呼吸阻力相關微覺醒的信賴度之測定。
