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Notes
      3. Old stuff
          3.2. Old physio stuff (around 2005)
              3.2.3. Physiology
                  3.2.3.13. Respiratory
                      3.2.3.13.2. Ventilation and perfusion
                          3.2.3.13.2.2. Ventilation
 3.2.3.13.2.2.2. Lung volumes 
 1. Closing capacity and closing volume
 2. Functional residual capacity

Lung volumes

##Diagram 20050306(5) - "Lung volumes"

 

Basic volumes and capacity

Volume

Residual volume (RV) = 15-20 mL/kg

Expiratory reserve volume (ERV) = 15 mL/kg

Tidal volume (VT) = 7 mL/kg

Inspiratory reserve volume (IRV) = 45 mL/kg

Capacity

Total lung capacity (TLC)
= RV + ERV + VT + IRV
= about 75-80 mL/kg

Vital capacity (VC)
= ERV + VT + IRV
= about 60-70 mL/kg

Functional residual capacity (FRC)
= RV + ERV
= 30 mL/kg

Inspiratory capacity
= VT + IRV

Expiratory capacity
= ERV + VT

Volume vs capacity

Volumes are the base units

Capacities are combinations of two or more base volumes

 

 

 

 

 

Additional notes

To be added later

Details about FRC

Measurement of FRC, RV

 

 

 

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