In an adult polysomnogram, which item is considered optional to include in the report?

In an adult polysomnogram, which item is considered optional to include in the report?

• A. Number of periodic limb movements with arousals
• B. Percentage of total sleep time in each stage
• C. Highest heart rate during the recording
• D. Occurrence of hypoventilation during the diagnostic study in adults

Answer: (D)

Hypoventilation data in adults is not part of the standard reporting unless you have CO2 data; without capnography, you can't confirm nocturnal hypoventilation, so stating its occurrence is optional. The rest—sleep-stage percentages, periodic limb movements with arousals, and peak heart rate—are typically included because they describe sleep architecture, movement-related arousals, and autonomic response, which are central to interpreting the study. If CO2 monitoring is performed or there is clinical concern, documenting nocturnal hypoventilation becomes appropriate, but in routine adult PSG it remains optional.

Hypoventilation data in adults is not part of the standard reporting unless you have CO2 data; without capnography, you can't confirm nocturnal hypoventilation, so stating its occurrence is optional. The rest—sleep-stage percentages, periodic limb movements with arousals, and peak heart rate—are typically included because they describe sleep architecture, movement-related arousals, and autonomic response, which are central to interpreting the study. If CO2 monitoring is performed or there is clinical concern, documenting nocturnal hypoventilation becomes appropriate, but in routine adult PSG it remains optional.