Certified Polysomnographic Technician (CPSGT) Practice Exam 2025 - Free CPSGT Practice Questions and Study Guide

Monitoring oxygen saturation is a crucial aspect of polysomnography as it provides significant insight into a patient's sleep quality and overall respiratory function during sleep. During the sleep cycle, especially in stages of deep sleep and REM sleep, it's vital to ensure that the body receives adequate oxygen. A drop in oxygen saturation levels can indicate respiratory issues, such as obstructive sleep apnea, which can lead to disrupted sleep patterns and a decline in sleep quality.

Assessing oxygen saturation helps in identifying whether hypoxemia occurs during sleep, which can lead to daytime fatigue, cardiovascular problems, and other health complications. This is why oxygen saturation is commonly included in polysomnographic studies as a marker of sleep quality and an essential factor in diagnosing sleep-related breathing disorders.

Other elements such as heart rate, body temperature, and eye movements may provide important information regarding sleep stages and overall health, but oxygen saturation specifically addresses the critical aspect of brain and bodily function during sleep, making it a central focus in evaluating sleep quality.