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Respiratory Health and Sleep Apnea Flashcards

7 cards from real NRCME practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Respiratory Health and Sleep Apnea flashcards as text

  1. A driver presents with a prescription for zolpidem (Ambien) taken nightly for insomnia. How should the medical examiner proceed?

    Answer: Assess daytime sedation risk and consider underlying sleep disorder evaluation

    Sedative-hypnotics like zolpidem carry next-day impairment risk and may mask an underlying sleep disorder requiring evaluation.

  2. What is the primary physiological mechanism causing hypertension in untreated obstructive sleep apnea?

    Answer: Repetitive sympathetic nervous system activation during apneic events

    Repetitive apneic events trigger surges in sympathetic tone, raising catecholamines and causing sustained hypertension even during waking hours.

  3. Which of the following scenarios best justifies a 1-year (rather than 2-year) medical certificate for a driver with respiratory disease?

    Answer: Severe COPD with FEV1 60% predicted on stable bronchodilator therapy

    Severe COPD with reduced FEV1 warrants more frequent monitoring; a 1-year certificate allows reassessment of disease stability and treatment response.

  4. A truck driver reports he feels refreshed after only 5 hours of sleep and denies excessive daytime sleepiness. His Epworth score is 4. Which statement is most accurate?

    Answer: An ESS below 10 in a high-risk driver still warrants objective sleep testing

    Some drivers with severe OSA subjectively underestimate sleepiness; high anatomic risk factors justify polysomnography regardless of ESS score.

  5. Which body measurement is most predictive of OSA risk in the NRCME screening framework?

    Answer: Neck circumference

    Neck circumference ≥17 inches (men) or ≥16 inches (women) is a strong independent predictor of OSA risk used in FMCSA guidance.

  6. A driver with treated OSA presents CPAP data showing average use of 5.2 hours/night on 68% of nights over the past 90 days. Does this meet standard compliance criteria?

    Answer: No, because compliance requires use on ≥70% of nights

    Standard CPAP compliance requires ≥4 hours/night on ≥70% of nights; this driver meets the hours threshold but fails the percentage-of-nights criterion.

  7. What is the significance of nocturnal oxygen desaturation below 88% in a commercial driver?

    Answer: It signals significant hypoxic burden that may impair daytime neurocognitive function

    Repeated desaturation events below 88% correlate with cognitive impairment, cardiovascular risk, and increased accident rates in commercial drivers.