Question

If alveolar ventilation is 4200 mL/min, respiratory . frequency is 12 breaths per minute, and tidal volume is 500, What is the anatomical-dead space ventilation?

• A. 1800 mL/min
• B. 6000ml7min
• C. 350 mL/min
• D. 1200 mL/min

Answer 1

The correct option is A 1800 mL/min

Total minute ventilation is comprised of dead space plus alveolar ventilation. Minute ventilation is respiratory frequency (12 breaths per minute) multiplied by tidal volume (500 mL/breath) = 6000 mL/min. Subtract from that alveolar ventilation (4200 mL/min) le., 6000 - 4200 = 1800 mL/min.