Alveolar Ventilation

Question 1

Minute ventilation with equation

Answer 1

Total volume of air inhaled or exhaled per minute

Ve = Vt * f

F = frequency of breathing per minue

Only part of tidal volume enters alveolar space and participates in gas exchange

Question 2

Last generation of conducting airway

Answer 2

Terminal bronchiole

Question 3

Alveolar ventilation and equation

Answer 3

Total volume of air that enters the alveolar region for gas exchange per minute

Va = (Vt-Vd) * f

Question 4

CO2 production rate (or elimination rate)

Answer 4

Total volume of CO2 produced by body metabolism each minute

Eliminated in one breath - VCO2 = (Vt-Vd)*FACO2

Question 5

CO2 elimination rate equation

Answer 5

VCO2 * f = (Vt-Vd)fFACO2

Question 6

All CO2 comes from

Answer 6

Alveolar air and in a steady state condition the CO2 elimination rate is constant

Question 7

Change in alveolar ventilation on alveolar gas compoisitons (CO2)

Answer 7

If hypoventilation, then will increase PACO2

Question 8

Change in alveolar ventilation on alveolar gas compoisiton (O2)

Answer 8

Hypoventilation will decrease PaO2

Question 9

RQ equation

Answer 9

VCO2/VO2 (dot versions)

Ranges from .7 (fat metabolism) to 1.0 (carb metabolism)