aa_gradient: Calculate A-a O2 Gradient

In bgulbis/icuriskr: Calculate ICU Morbidity and Mortality Risk Scores

Calculate A-a O2 Gradient

Description

This function calculates the Alveolar-arterial (A-a) gradient.

Usage

aa_gradient(pco2, pao2, fio2 = 21, temp = 37, elev = 0)

Arguments

pco2	A numeric, the partial pressure of carbon dioxide in arterial blood
pao2	A numeric, the partial pressure of oxygen in arterial blood
fio2	A numeric, the Fraction of Inspired Oxygen; defaults to room air, 21 percent
temp	A numeric, the patient temperature in degrees Celsius; defaults to normal temperature, 37 degrees
elev	A numeric, the elevation above sea level in meters; defaults to sea level, 0 meters

Value

A numeric

References

1. Kanber GJ, King FW, Eshchar YR, et. al. The alveolar-arterial oxygen gradient in young and elderly men during air and oxygen breathing. Am Rev Respir Dis. 1968 Mar;97(3):376-81.

2. Mellemgaard K. The alveolar-arterial oxygen difference: its size and components in normal man. Acta Physiol Scand. 1966 May;67(1):10-20.

bgulbis/icuriskr documentation built on June 18, 2022, 1:33 a.m.