Signs, Symptoms, and Complications of Sleep Apnea - Excessive daytime sleepiness (EDS) and impaired alertness - Increased risk of driving and work-related accidents - Moodiness, belligerence, and decreased attentiveness and energy - Higher risk of diabetes - Lack of awareness or misdiagnosis due to varied symptoms - Daytime fatigue, sleepiness, cardiovascular problems, and eye problems - Increased risk of severe complications of COVID-19 - Higher risk of developing other medical conditions - Sleep-disordered breathing is associated with an increased risk of cardiovascular disease, stroke, and high blood pressure - Daytime functioning problems include sleepiness, motor vehicle crashes, and decreased cognitive functioning - Psychological problems and reduced quality of life are also associated with sleep apnea - Stroke and cerebrovascular diseases are linked to obstructive sleep apnea - Sleep apnea can contribute to hypertension that persists during sleep

Mechanism of Sleep Apnea - Build-up of carbon dioxide in the bloodstream triggers awakening and clears the airway - Decreased output of the brainstem regulating chest wall or pharyngeal muscles causes pharynx collapse - Reduced or no slow-wave sleep and less time in REM sleep

Diagnosis of Sleep Apnea - Medical consensus and debate regarding apneic events and variability of patients' physiologies - Use of multi-criteria decision rule to account for variability in defining events - Polysomnography as the gold standard for diagnosis - Oximetry as a simpler alternative for home testing - Variability and limitations of equipment and methods

Frequency, Statistics, and Risk Factors of Sleep Apnea - Sleep apnea affects approximately 1 in every 10 people globally - Higher prevalence in men than women (2:1 ratio) - Aging and obesity increase the risk - Lack of awareness and underutilization of CPAP machines in developed and developing countries - Association between sleep apnea and increased risk of various medical conditions, including Alzheimer's disease. - Obstructive Sleep Apnea (OSA) accounts for 84% of cases - Central Sleep Apnea (CSA) accounts for 0.9% of cases - Mixed sleep apnea accounts for 15% of cases - OSA is the most common category of sleep-disordered breathing - CSA is characterised by a lack of respiratory effort during sleep - Low muscle tone and soft tissue around the airway increase the risk of OSA - Structural features that narrow the airway also contribute to the risk - Obesity is a significant risk factor for developing OSA - The risk of OSA increases with age, especially in the elderly - Men are more likely to develop sleep apnea than women and children - Common symptoms include loud snoring, restless sleep, and daytime sleepiness - Diagnostic tests include home oximetry and polysomnography - Hypoxemia (low blood oxygen) and sleep deprivation are complications of severe OSA - Snoring, in combination with other risk factors, is highly predictive of OSA - Up to 78% of genes associated with habitual snoring also increase the risk for OSA

Treatment Options for Sleep Apnea - Lifestyle changes such as avoiding alcohol and losing weight can help manage OSA - Sleeping at an elevated position or on the side can prevent airway collapse - Oral appliances like the Mandibular advancement splint can keep the airway open - Continuous positive airway pressure (CPAP) is the most effective treatment for severe OSA - Surgical procedures may be recommended to remove or tighten tissue and widen the airway