Alveolar ventilation VA = (VT - VD) × f. If VT = 0.60 L, VD = 0.15 L, f = 12/min, what is VA?

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Multiple Choice

Alveolar ventilation VA = (VT - VD) × f. If VT = 0.60 L, VD = 0.15 L, f = 12/min, what is VA?

Alveolar ventilation measures the air actually reaching the gas-exchange parts of the lung each minute. It equals (tidal volume minus dead space) times the breathing frequency: VA = (VT − VD) × f. Here, VT is 0.60 L and VD is 0.15 L, so the air reaching the alveoli per breath is 0.60 − 0.15 = 0.45 L. With a rate of 12 breaths per minute, VA = 0.45 × 12 = 5.4 L/min.

Alveolar ventilation measures the air actually reaching the gas-exchange parts of the lung each minute. It equals (tidal volume minus dead space) times the breathing frequency: VA = (VT − VD) × f. Here, VT is 0.60 L and VD is 0.15 L, so the air reaching the alveoli per breath is 0.60 − 0.15 = 0.45 L. With a rate of 12 breaths per minute, VA = 0.45 × 12 = 5.4 L/min.

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