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Ventilation/Perfusion Ratio

Alveolar Ventilation per Minute V
ml
Pulmonary Blood Flow per Minute Q
ml
Result:

Calculation Formula

Ventilation/Perfusion Ratio = V/Q

Explanation

English Name: Ventilation/Perfusion ratio, V/Q

Normal Range: 0.84

If V/Q increases, it means excessive ventilation and relatively insufficient blood flow, causing some alveolar gas to not fully exchange with blood gas, resulting in an increase in alveolar dead space; conversely, if V/Q decreases, it means insufficient ventilation and relatively excessive blood flow.

References

Research Paper Yao Tai, Editor. Physiology (Eight-year Edition) [M]. People's Medical Publishing House. 2005
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