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Pulmonary & Critical Care Medicine MOC Sample Question 1

The following polysomnogram was obtained from a 50-year-old man with a history of excessive daytime sleepiness. Channels highlighted in purple (top to bottom) represent ROC-A1, thermistor, thorax, abdomen, left leg, and right leg. According to his wife, the patient experiences leg jerking during sleep. What condition is demonstrated in this study?

  • AObstructive apnea
  • BCentral apnea
  • CMixed apnea
  • DRestless legs syndrome
  • EPeriodic limb movements of sleep
Pulmonary & Critical Care Medicine MOC Sample Question 2

A man with a diagnosis of obesity hypoventilation syndrome (OHS) is undergoing a bilevel titration. His prior diagnostic sleep study revealed severe obstructive sleep apnea (OSA). After 2 hours of the study, the patient is on IPAP 14cm H2O and EPAP 10cm H2O. No obstructive respiratory events or snoring have been observed since increasing the pressures to these settings 30 minutes ago. The patient’s baseline oxygen saturation is 85%. Summary graphics of the first 2 hours and a tracing are provided below. What is the next step by the technician?


  • AObserve at current pressure
  • BIncrease inspiratory positive airway pressure (IPAP)
  • CIncrease IPAP and expiratory positive airway pressure (EPAP)
  • DStart supplemental oxygen

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