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RRT MCQ Flashcards

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

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  1. A patient on mechanical ventilation develops decreased compliance and new bilateral infiltrates 48 hours post-intubation. Which lung-protective strategy parameter should be monitored to prevent VILI?

    Answer: Plateau pressure below 30 cmH2O

    Plateau pressure reflects alveolar distending pressure and should be kept below 30 cmH2O to minimize ventilator-induced lung injury (VILI).

  2. A patient has the following ABG: pH 7.50, PaCO2 30 mmHg, HCO3 23 mEq/L. What is the acid-base interpretation?

    Answer: Acute respiratory alkalosis

    A high pH with low PaCO2 and normal bicarbonate indicates acute respiratory alkalosis with no metabolic compensation yet.

  3. When performing a therapeutic bronchoscopy to remove a mucus plug, what is the MAXIMUM safe duration of each suction pass?

    Answer: 10–15 seconds

    Each suction pass during bronchoscopy should be limited to 10–15 seconds to prevent significant oxygen desaturation and mucosal trauma.

  4. A patient is receiving BiPAP with IPAP 14 cmH2O and EPAP 6 cmH2O. What is the effective pressure support being delivered?

    Answer: 8 cmH2O

    Effective pressure support in BiPAP equals IPAP minus EPAP (14 − 6 = 8 cmH2O), which drives tidal volume delivery.

  5. Which pulse oximetry reading is MOST likely to be falsely elevated (overestimated) in a patient with carbon monoxide poisoning?

    Answer: SpO2 by standard pulse oximetry

    Standard pulse oximetry cannot distinguish oxyhemoglobin from carboxyhemoglobin, so SpO2 reads falsely high in CO poisoning; co-oximetry is required for accurate measurement.

  6. A patient with obstructive sleep apnea is titrated on CPAP. The recommended first-line CPAP pressure titration endpoint is elimination of which event?

    Answer: Obstructive apneas, hypopneas, and snoring

    CPAP titration aims to eliminate obstructive apneas, hypopneas, respiratory effort-related arousals (RERAs), and snoring to achieve an AHI <5.

  7. Which ventilator mode provides a guaranteed tidal volume while allowing variable inspiratory flow to meet patient demand?

    Answer: Volume-Assured Pressure Support (VAPS)

    Volume-assured pressure support (VAPS/AVAPS) automatically adjusts pressure support to guarantee a target tidal volume while still allowing demand-driven flow delivery.