Three types of obstructive sleep apnea are apnea, hypopnea and arousal related to respiratory effort (Stanford Health Care). Some patients with obstructive sleep apnea may develop cardiovascular abnormalities due to repetitive cycles of blocked breathing (Barker Sleep Institute). Symptoms of obstructive sleep apnea in children are snoring, bedwetting, sleepwalking, mouth breathing, and enlarged tonsils (Stanford Health Care). Patients with obstructive sleep apnea suffer from fragmented sleep (Barker Sleep Institute). Central sleep apnea occurs when the breathing control system is unstable as the individual transitions from wakefulness to sleep (Stanford Health Care). Symptoms of central sleep apnea are divided into five categories: primary central sleep apnea, Cheyne-Stokes breathing pattern, non-Cheyne-Stokes medical condition, periodic breathing at high altitude, and due to medications or substances (Barker Sleep Institute ). The most common between obstructive and central is obstructive sleep apnea (National Sleep