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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?

  1. Obstructive apnea

  2. Central apnea

  3. Mixed apnea

  4. Restless legs syndrome

  5. Periodic limb movements of sleep

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?

  1. Observe at current pressure

  2. Increase inspiratory positive airway pressure (IPAP)

  3. Increase IPAP and expiratory positive airway pressure (EPAP)

  4. Start supplemental oxygen

Pulmonary & Critical Care Medicine MOC Question Bank

Pass the ABIM Pulmonary Disease & Critical Care Recertification exams with more than 600 board-style practice questions with detailed explanations. This question bank is for Pulmonologists taking the American Board of Internal Medicine (ABIM) Pulmonary Disease Maintenance of Certification (MOC) Exam as well as the Critical Care Medicine MOC Exam.


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