The polysomnographic tracing of a patient with mixed apnea is shown by which of the follow-ing?
a.
b.
c.
d.
ANS: A
With mixed apnea, there is cessation of airflow at the nose and mouth. Initially, there is an ab-sence of respiratory effort, which is the central component, followed by at least 2 cycles of res-piratory effort with continued absence of airflow, which is the obstructive component.
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