Upper Airway Resistance Syndrome (UARS)

. Chapters 0:00 Introduction 0:29 Symptoms of Upper Airway Resistance Syndrome 1:09 Causes of Upper Airway Resistance Syndrome 1:55 Diagnosis process for Upper Airway Resistance Syndrome 2:34 Treatment options for Upper Airway Resistance Syndrome Upper airway resistance syndrome is a sleep disorder characterized by the narrowing of the airway that can cause disruptions to sleep.[1][2] The symptoms include unrefreshing sleep, fatigue, sleepiness, chronic insomnia, and difficulty concentrating. UARS can be diagnosed by polysomnograms capable of detecting Respiratory Effort-related Arousals. It can be treated with lifestyle changes, orthodontics, surgery, or CPAP therapy.[3] UARS is considered a variant of sleep apnea,[4] although some scientists and doctors believe it to be a distinct disorder.[5][6] Symptoms of UARS are similar to those of obstructive sleep apnea, but not inherently overlapping. Fatigue, insomnia, daytime sleepiness, unrefreshing sleep, anxiety, and frequent awakenings during sleep are the most common symptoms. Oxygen desaturation is minimal or absent in UARS, with most having a minimum oxygen saturation 92%.[8] Many patients experience chronic insomnia that creates both a difficulty falling asleep and staying asleep. As a result, patients typically experience frequent sleep disruptions.[9] Most patients with UARS snore, but not all.[4] Some patients experience hypotension, which may cause lightheadedness, and patients with UARS are also more likely to experience headaches and irritable bowel syndrome.[9] Predisposing factors include a high and narrow hard palate, an abnormally small intermolar distance, an abnormal overjet greater than or equal to 3 millimeters, and a thin soft palatal mucosa with a short uvula. In 88% of the subjects, there is a history of early extraction or absence of wisdom teeth. There is an increased prevalence of UARS in east Asians.[6]

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