Ventilation Flashcards
(7 cards)
1
Q
what is pulmonary minute ventilation
A
total volume of air entering and leaving the respiratory system each minute
- TV x RR
2
Q
what is the average minute ventilation
A
normal Tv = 500ml
normal respiratory rate = 12breaths/min
minute ventilation = 500 x 12 = 6000ml/min
3
Q
what is alveolar ventilation
A
volume o fair exchanged between the atmosphere and the alveoli per minute
4
Q
why is alveolar ventilation less than pulmonary ventilation
A
anatomical dead space
5
Q
what is the anatomical dead space
A
volume of air in the conducting airways that is useless for exchange
- approx 150ml
6
Q
what is the average alveolar ventilation and formula
A
alveolar ventilation = (tidal volume - dead space) x respiratory rate
(500-150) x 12 = 4200ml/min
7
Q
A
