On a PSG, an obstructive apnea differs from a central apnea primarily because:

On a PSG, an obstructive apnea differs from

Multiple choice — select the best answer

AContinued thoracoabdominal effort is present despite absent airflow
BThere is no arousal at termination
COxygen desaturation does not occur
DIt is shorter in duration than a central apnea

✓ Correct answer: A. Continued thoracoabdominal effort is present despite absent airflow Obstructive apneas show persistent respiratory effort (paradoxical rib-cage/abdominal movement visible on effort belts) despite absent airflow, indicating airway obstruction. Central apneas lack both airflow and effort.

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On a PSG, an obstructive apnea differs from a central apnea primarily because:

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