A respiratory arousal is any event on a sleep study where you obstruct partially or fully, and wake up (your brain waves light up showing that you went from sleep to awake), and this can occur after an apnea, hypopnea, or a RERA. A RERA (respiratory event related arousal) is an arousal associated with partial resistance to inspiratory breathing, but not enough to be called an apnea or hypopnea. Some centers calculate an RDI (respiratory disturbance index) which includes RERAs along with apneas and hypopneas. This is different from a standard arousal, where you have at least a 3 seconds upward shift in frequencies proceeded by at least 10 continuous seconds of another sleep stage.
What was your AHI, RDI, RERA, and arousal index?
Steven Y. Park, M.D.