Certified Healthcare Constructor (CHC) Practice Exam

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What is the primary use of polysomnography (PSG)?

To detect cardiac issues
To monitor physiological data during sleep studies
To evaluate metabolic rates
To track neurological disorders

The correct answer is: To monitor physiological data during sleep studies

Polysomnography (PSG) is primarily used to monitor physiological data during sleep studies. This diagnostic tool captures a variety of physiological signals while a patient sleeps, including brain waves, oxygen levels in the blood, heart rate, and respiratory patterns. These measurements help to identify and evaluate sleep disorders such as sleep apnea, insomnia, and narcolepsy, among others. The comprehensive nature of PSG allows healthcare professionals to gain insights into the various stages of sleep and identify abnormalities or interruptions in the sleep cycle, which can significantly impact a patient’s overall health. It plays a crucial role in understanding how different factors during sleep influence bodily functions. Other options, while related to aspects of health monitoring, do not align with the primary purpose of polysomnography. For instance, detecting cardiac issues primarily relates to cardiac monitoring tools, evaluating metabolic rates involves tests like indirect calorimetry, and tracking neurological disorders typically requires other specialized assessments that focus on brain function and activity outside of sleep studies.