VentResp — KinFAST

Adaptive test — questions are selected based on your ability estimate. — Tag: MinuteAlveolarVent

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A respiratory therapist notes that two patients each have a minute ventilation of approximately 6 L/min, but their alveolar ventilations differ substantially. Based on the relationship between these two measures, what factor most likely accounts for the difference?

Alveolar ventilation increases when the respiratory rate decreases, regardless of tidal volume The patients have different anatomical dead space volumes or different tidal volume to respiratory rate ratios, so the air actually reaching the alveoli (minute ventilation minus dead space ventilation) differs even when total minute ventilation is the same Minute ventilation excludes dead space, while alveolar ventilation includes it; therefore alveolar ventilation is always higher Alveolar ventilation reflects only the air leaving the lungs during expiration, while minute ventilation reflects only inspired air

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