Certified Polysomnographic Technician (CPSGT) 2025 – 400 Free Practice Questions to Pass the Exam

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What is one way to classify sleep stages during polysomnography?

Using the National Sleep Foundation criteria

Based on verbal reports from the patient

Using the Rechtschaffen and Kales (RandK) scoring criteria

One method to classify sleep stages during polysomnography is through the use of the Rechtschaffen and Kales (R&K) scoring criteria. This system provides a standardized approach for categorizing different stages of sleep, including REM (Rapid Eye Movement) sleep and various stages of non-REM sleep based on specific EEG, EOG (Electrooculogram), and EMG (Electromyogram) patterns recorded during sleep studies. The R&K criteria have been widely used in sleep medicine and have established definitions for scoring sleep stages that facilitate consistent interpretation of polysomnographic data.

Utilizing these criteria helps to ensure that the assessment of sleep architecture is systematic and scientifically valid, contributing to accurate diagnosis and treatment of sleep disorders. This method is preferred over more subjective approaches, as it minimizes bias and provides a clear framework for analysis.

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Using a subjective visual scale

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