Sleep Medicine Certification Examination: Physician Preparation Guide Study Guide

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A resident feels more alert after coffee near the end of an overnight shift but still makes attention errors. Explain that adenosine receptor blockade can mask sleepiness while the physiological need for recovery sleep remains.

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A traveler obtains enough total sleep but remains sleepy during local afternoons and alert late at night. Use the mismatch between internal timing and local clock time to explain symptoms despite apparently sufficient sleep duration.

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A 30-second epoch contains a spindle and eight seconds of 1-Hz frontal waves measuring 100 µV peak to peak. Eight divided by thirty is 26.7%, exceeding the 20% slow-wave threshold: score N3. A spindle with insufficient qualifying slow-wave activity supports N2.

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After twenty seconds of continuous REM sleep, a four-second qualifying EEG frequency shift occurs with two seconds of increased chin EMG: score an arousal. The same EEG change without the required chin-EMG increase does not meet REM arousal criteria.

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A patient routinely cuts the final two hours from an otherwise stable sleep schedule. Explain why obtaining early-night deep sleep does not make the omitted late-night sleep physiologically interchangeable or unnecessary for normal sleep architecture.

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An older adult reports longstanding lighter sleep but newly falls asleep during conversations after developing loud snoring. Separate the stable age-related pattern from the new daytime impairment that requires investigation for an additional sleep disorder.

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A 15-month-old sleeps ten hours overnight and takes a two-hour nap. Calculate twelve hours across the day and compare that total with the age-specific 11–14-hour recommendation before labeling the nighttime duration inadequate.

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An eight-year-old has nine hours allocated to bed but remains awake for an hour and takes no naps. Estimate eight hours of actual sleep, below the 9–12-hour age recommendation, and investigate the shortened sleep opportunity.

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A sixteen-year-old sleeps from midnight to 6:00 a.m. on school days and much longer on weekends. Compare six hours with the 8–10-hour recommendation and examine both insufficient opportunity and the timing of unrestricted sleep.

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During sleep, nasal pressure falls 40% for twelve seconds and ends in an EEG arousal, with only 2% desaturation. This qualifies as a hypopnea under the recommended arousal-or-3% rule, but not under the alternative 4% desaturation rule. It does not meet apnea amplitude criteria.

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A PSG records 150 qualifying apneas and hypopneas during five hours of sleep within a seven-hour recording. Calculate an AHI of 30 events per hour using sleep time, rather than dividing by the full recording duration.

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A student cannot sleep at 10:00 p.m. but sleeps reliably from 2:00 a.m. to 10:00 a.m. during holidays. The preserved sleep on a delayed schedule supports circadian misalignment over a generalized inability to maintain sleep.

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A patient becomes irresistibly sleepy at 7:00 p.m., sleeps well until 3:00 a.m., and struggles to attend evening activities. Evaluate the consistently advanced entire sleep period rather than treating the early awakening as an isolated insomnia symptom.

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A totally blind patient alternates between weeks of good nighttime sleep and weeks of daytime sleeping. A longitudinal sleep record shows progressively later sleep onset, supporting non-24-hour timing rather than a fixed delayed sleep phase.

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An adult with a stable delayed rhythm wants earlier sleep and waking. Melatonin timed to the biological afternoon/evening advance portion of the response curve can move the clock earlier. Taking it in the biological morning could instead delay the rhythm and worsen the mismatch with work.

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A teenager uses bright screens late and sleeps through morning daylight on weekends. Reduce biological evening light and combine a consistent waking schedule with post-awakening light timed after the estimated temperature minimum. The first change reduces delay; the second supplies an advancing signal, supporting earlier sleep and waking.

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A night worker sleeps only five fragmented daytime hours and becomes sleepy near the end of each shift. Compare workdays with extended leave, documenting sleep opportunity and symptom timing before interpreting daytime testing for a central hypersomnia.

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An adult reports four nights weekly of prolonged sleep onset for five months, adequate time in bed and impaired concentration. This pattern supports chronic insomnia assessment; a coworker sleeping briefly because of a second job instead lacks sufficient opportunity.

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An adult with chronic insomnia prefers to avoid medication and has already reduced caffeine without improvement. Offer structured CBT-I that addresses conditioned wakefulness, sleep scheduling and unhelpful beliefs instead of repeating the same general sleep advice.

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A patient spends hours in bed checking messages and worrying about sleep. Develop a stimulus-control plan that moves wakeful activities out of bed and restores a consistent morning rising time while reserving bed entry for sleepiness.

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A patient spends nine hours in bed but estimates six hours asleep and operates heavy machinery at work. Assess occupational exposure and daytime sleepiness before selecting a sleep window. Modify or omit sleep restriction when its risks outweigh benefits while retaining suitable cognitive and behavioral components.

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A patient believes one poor night guarantees professional failure and repeatedly checks the time. Use cognitive work to examine that prediction and its effects on arousal, alongside behavioral methods that reduce wakeful monitoring in bed.

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An adult notices marked muscle tension and racing thoughts at bedtime. Incorporate a practiced relaxation method into treatment while explaining that its purpose is to reduce arousal, not to guarantee sleep within a specified number of minutes.

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A patient has a dark bedroom, avoids evening caffeine and follows a regular routine but remains awake worrying in bed. Move toward targeted CBT-I rather than concluding that the person simply needs stricter adherence to hygiene advice.

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A toddler falls asleep only while being held and calls for the same assistance after each awakening. Review the learned sleep-onset conditions with caregivers and develop a consistent behavioral plan that fits the child's age and family circumstances.

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A six-year-old repeatedly leaves bed and sometimes receives an extra hour of television after protesting. Establish a predictable bedtime routine and consistent caregiver responses while checking that the planned sleep schedule provides appropriate opportunity and timing.

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An adult's pain improves, but prolonged wakefulness in bed and fear of sleeplessness persist. Continue appropriate pain care while offering insomnia-specific behavioral treatment instead of waiting indefinitely for sleep to normalize as a secondary consequence.

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One patient reports exhaustion but never dozes; another repeatedly falls asleep while reading and during meetings. Clarify sleep propensity in each case before selecting objective testing or attributing both complaints to the same central hypersomnolence disorder.

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A worker referred for possible narcolepsy sleeps five hours nightly because of two jobs and ten hours when off duty. First document and correct restricted sleep opportunity, then reassess symptoms before interpreting central hypersomnolence testing.

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A sleepy patient reports that laughter makes the knees buckle for several seconds while awareness remains intact. Ask specifically about triggers, distribution of weakness and consciousness rather than interpreting the event as merely falling asleep.

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A patient has persistent sleepiness, convincing cataplexy and supportive objective testing but no sleep paralysis. The absent paralysis does not negate type 1 assessment because individual REM-related symptoms are not all required to be present.

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After four months of daily sleep lapses, a patient without cataplexy has an adequately prepared MSLT mean latency of seven minutes and one SOREMP, plus a preceding-night PSG SOREMP. Together these meet the objective threshold, provided competing causes are excluded. Lumbar puncture is not mandatory.

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A patient describes a brief sensed presence and inability to move on awakening after several short nights, without persistent daytime sleepiness. Clarify the sleep-transition timing and sleep schedule rather than diagnosing narcolepsy from that experience alone.

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An adult working night shifts recently stopped a REM-suppressing antidepressant. Establish a stable schedule with two weeks of documentation, confirm treatment of other sleep disorders, and coordinate a safe medication plan. Schedule the PSG and subsequent MSLT around the established major sleep period rather than curtailing sleep to fit routine laboratory hours.

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A partner reports repeated punching during apparent dream enactment, while the patient recalls defending against an attacker. Evaluate for RBD and its mimics instead of reassuring solely because the behavior occurred during a dream.

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A patient with dream enactment has struck a partner and keeps a heavy object beside the bed. Remove dangerous objects and address furniture, falls and partner protection immediately while arranging further evaluation and treatment.

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An eight-year-old sits up confused ninety minutes after sleep onset, then walks into the hallway and returns to sleep without full awakening. This combines confusional arousal and sleepwalking features. A similar episode dominated by a scream and intense fear suggests sleep terror.

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For a sleepwalker approaching stairs, protect access to stairs and windows, establish adequate regular sleep and assess snoring or medication contributors. Atypical recurrent motor events warrant video-PSG with appropriate EEG assessment when epilepsy remains a concern.

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A patient develops uncomfortable leg urges while sitting each evening, obtains relief by walking and has little difficulty during active daytime work. Confirm the complete symptom pattern and assess mimics before labeling the complaint RLS.

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A child with clinically significant RLS has normal hemoglobin and ferritin of 35 ng/mL. The value is below the pediatric 50-ng/mL threshold, supporting clinician-supervised iron treatment after reviewing the complete iron studies, contraindications and follow-up plan.

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A patient taking a dopamine agonist develops afternoon symptoms that previously began only at bedtime, with new arm involvement. Recognize possible augmentation and reassess treatment rather than interpreting the earlier symptoms as an automatic indication for a higher dose.

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An adult has a PLMS index of eighteen per hour but untreated OSA and daytime sleepiness. The numerical threshold is exceeded, yet PLMD remains unestablished because a competing disorder may explain the impairment. A child's index of six per hour exceeds the pediatric threshold but still requires the other criteria.

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A patient reports worse evening leg urges after adding a sedating over-the-counter antihistamine and increasing caffeine. Review those changes and screen for coexisting OSA before escalating chronic RLS medication or assuming unexplained disease progression.

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A recording shows absent airflow while chest and abdominal efforts continue. Identify an obstructive mechanism and relate it to recurrent airway collapse rather than assuming that every pause in breathing reflects loss of respiratory drive.

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A patient with heart failure has absent-effort pauses separated by waxing and waning ventilation: consider CSA with Cheyne-Stokes breathing. The same absent-effort events beginning only during treatment of previously obstructive disease raise a different, treatment-emergent classification.

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A patient with NYHA class III chronic symptomatic heart failure, LVEF 40% and moderate-to-severe predominant CSA meets the stated AirCurve 11 ASV contraindication. Experienced-center monitoring does not make that device eligible. Optimize cardiac treatment and assess other appropriate CSA therapies instead of automatically selecting ASV or spontaneous bilevel PAP.

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A high-risk screening result is recorded during a preoperative visit. Use it to identify the need for clinical assessment and an appropriate diagnostic pathway rather than documenting a definitive OSA diagnosis from the score alone.

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An adult has habitual loud snoring, witnessed apneas and daytime sleepiness without major complicating illness. Consider a technically adequate HSAT within a clinical evaluation, while explaining that its usefulness depends on both patient selection and the result.

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An adult with witnessed apneas and substantial sleepiness has a negative HSAT. Arrange polysomnography to resolve the persistent suspicion rather than ending evaluation or assuming that a questionnaire can adjudicate the discordant result.

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A sleepy patient taking chronic opioids has witnessed breathing pauses and possible hypoventilation. Choose polysomnography over an uncomplicated-OSA home-testing pathway because central events and broader respiratory abnormalities require assessment in this clinical setting.

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A patient has BMI 38 kg/m², established sleep-disordered breathing and awake resting PaCO2 of 48 mm Hg at sea level. These satisfy the three measured components; exclude pulmonary, neuromuscular, chest-wall, medication and other causes before attributing the hypoventilation to OHS.

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A patient with severe obesity is sleepy despite an acceptable pulse-oximeter reading while receiving oxygen. Investigate suspected carbon dioxide retention with an appropriate carbon dioxide assessment instead of using saturation alone to declare ventilation normal.

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A patient asks why oxygen through a nasal cannula is not equivalent to prescribed CPAP. Explain that CPAP addresses recurrent airway closure through positive pressure, whereas an improved oxygen reading alone does not demonstrate elimination of obstruction.

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A seven-year-old snores most nights, breathes laboriously during sleep and has new classroom behavior problems. Consider pediatric OSA despite the absence of daytime naps, and obtain an appropriate evaluation rather than attributing everything to behavior alone.

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A child has persistent loud snoring and witnessed obstructive breathing, but home oximetry shows no striking desaturations. Continue the diagnostic pathway toward appropriate PSG rather than considering the normal oxygen record sufficient to rule out OSA.

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A patient sleeps three hours, feels fully rested, speaks rapidly and begins multiple risky projects. Assess for a manic episode rather than interpreting the short sleep duration as isolated insomnia requiring only a bedtime intervention.

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Two patients sleep four hours: one is exhausted, depressed and wants more sleep; the other feels rested and unusually energized. Use mood, energy and behavioral context to distinguish the clinical meanings of the similar sleep durations.

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A patient with Parkinson disease begins striking a partner during apparent dreams. Ask about injury and the detailed behavior, implement environmental protection, and arrange sleep-specific assessment rather than treating the events as an inevitable feature needing no evaluation.

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A tracing shows reduced airflow and a desaturation. Examine respiratory effort to assess mechanism and sleep-state signals to determine whether the event occurred during sleep, rather than asking the oxygen channel to establish both conclusions.

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A clinician wants to assess a treated patient's ability to remain awake rather than investigate REM-onset sleep during naps. Select the MWT for that physiological question while integrating the result with symptoms, sleep opportunity and functional history.