Sleep-disordered breathing (SDB) can be described as a spectrum of abnormal breathing during sleep that may range from primary snoring to hypopneas to periods of obstructive sleep apnea (OSA), during which there is complete cessation of breathing.Cessation of breathing for ten seconds or longer are termed apneas. It involves a decrease or complete halt in airflow despite an ongoing effort to breathe. It occurs when the muscles relax during sleep, causing soft tissue in the back of the throat to collapse and block the upper airway.The brain responds to the lack of oxygen by alerting the body,...