IMPACT OF CONTINUOUS POSITIVE AIRWAY PRESSURE USE ON POLYSOMNOGRAPHY OUTCOMES

Obstructive sleep apnea (OSA) is a respiratory disorder characterized by recurrent episodes of upper airway obstruction during sleep, resulting in oxygen desaturation, sleep fragmentation, and several systemic repercussions. Its high prevalence and association with cardiovascular, metabolic, neurocognitive diseases, and impaired quality of life make OSA an important public health issue. Diagnosis is primarily performed through polysomnography (PSG), considered the gold standard for evaluating sleep-related breathing disorders, allowing the assessment of parameters such as the Apnea-Hypopnea Index (AHI), oxygen saturation, sleep architecture, and micro-arousals. Treatment with Continuous Positive Airway Pressure (CPAP) is considered the first-line therapy for patients with moderate to severe OSA, promoting the maintenance of upper airway patency during sleep. Scientific evidence indicates that regular CPAP use significantly reduces the AHI, improves nocturnal oxygenation, decreases micro-arousals, and promotes partial restoration of sleep architecture. In addition, treatment may contribute to reducing cardiovascular risk, improving cognitive function, quality of life, and metabolic parameters. The present study aims to analyze, through a qualitative, descriptive, and exploratory literature review, the impact of CPAP use on polysomnography outcomes in patients with OSA. The research will be conducted using national and international databases, including PubMed, SciELO, Web of Science, and Google Scholar. The results are expected to demonstrate the effectiveness of CPAP in improving polysomnographic parameters, highlighting the importance of treatment adherence and therapeutic individualization to achieve better clinical outcomes. Therefore, this review seeks to strengthen evidence-based medical practice and contribute to improving the follow-up of patients with obstructive sleep apnea.