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

Question

If alveolar ventilation is 4200 mL/min, respiratory frequency is 12 breaths per minute, and tidal volume is 500 mL, what is the anatomical-dead-space ventilation? (A) 1800 mL/min (B) 6000 mL/min (C) 350 mL/min (D) 1200 mL/min

Tardigrade Admin · Accepted Answer

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 alveolar ventilation (4200 mL/min) from that i.e., 6000 - 4200 = 1800 mL/min.

Q. If alveolar ventilation is $4200 m L / min$ , respiratory frequency is $12$ breaths per minute, and tidal volume is $500 m L$ , what is the anatomical-dead-space ventilation?

$1800 m L / min$

$6000 m L / min$

$350 m L / min$

$1200 m L / min$

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

1800mL/min

6000mL/min

350mL/min

1200mL/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 (500mL/breath) =6000mL/min. Subtract alveolar ventilation (4200mL/min) from that i.e., 6000−4200=1800mL/min.

Q. If alveolar ventilation is $4200 m L / min$ , respiratory frequency is $12$ breaths per minute, and tidal volume is $500 m L$ , what is the anatomical-dead-space ventilation?

$1800 m L / min$

$6000 m L / min$

$350 m L / min$

$1200 m L / min$