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

The primary purpose of a polysomnography (PSG) study is to diagnose sleep disorders by recording brain waves, oxygen levels, heart rate, and breathing during sleep. This comprehensive data collection allows healthcare providers to evaluate various physiological parameters and identify abnormalities that may indicate specific sleep disorders such as obstructive sleep apnea, narcolepsy, or periodic limb movement disorder.

By capturing the intricate details of what occurs during sleep, a PSG helps clinicians make informed decisions about treatment options, thereby improving patient outcomes. The integration of multiple physiological measurements provides a holistic view of the patient's sleep architecture, which is essential in establishing an accurate diagnosis.

Other options might focus on aspects related to sleep, such as monitoring sleep duration or measuring REM sleep quality, but they do not encompass the broader diagnostic capability that PSG offers. Sleep hygiene, while important for overall health, is not the primary function of a PSG study, which is specifically designed for clinical assessment and diagnosis of sleep-related disorders.