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Respiratory Quotient

The respiratory quotient is a dimensionless number used in calculations of basal metabolic rate when estimated from carbon dioxide production. It is calculated from the ratio of carbon dioxide produced by the body to oxygen consumed by the body.

The respiratory quotient equals the difference between the partial pressure of inspired oxygen and the partial pressure of alveolar oxygen divided by the partial pressure of arterial carbon dioxide.

Formula

QuantityVariable["RQ", "Unitless"] == (QuantityVariable[Subscript["iPO", "2"], "Pressure"] - QuantityVariable[Subscript["PAO", "2"], "Pressure"])/QuantityVariable[Subscript["PaCO", "2"], "Pressure"]

symbol description physical quantity
RQ respiratory quotient "Unitless"
PaCO2 partial pressure of arterial carbon dioxide "Pressure"
iPO2 partial pressure of inspired oxygen "Pressure"
PAO2 partial pressure of alveolar oxygen "Pressure"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Respiratory Quotient"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ResourceObject["Respiratory Quotient"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject["Respiratory Quotient"], {QuantityVariable[ \!\(\*SubscriptBox[\("iPO"\), \("2"\)]\),"Pressure"] -> Quantity[150, "MillimetersOfMercury"], QuantityVariable[ \!\(\*SubscriptBox[\("PAO"\), \("2"\)]\),"Pressure"] -> Quantity[120, "MillimetersOfMercury"], QuantityVariable["RQ","Unitless"] -> 0.7`}]
Out[3]=

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