Equation 1 [48]: | |
PNA (g protein/day) = 9.35 × G + 11.04 | |
Where: | |
G = Urea nitrogen generation x [urinary urea (g/L)/2.14 x urinary volume (mL) 24 h]/urine collection duration (min) (usually 1440) | |
or | |
Equation 2 [49]: | |
PNA (g protein/day) = [(NUU (g)) + (0.031 g N/kg)] × 6.25 | |
Where: | |
NUU = urinary urea nitrogen x [urinary urea (g/L)/2.14] x urinary volume 24 h (L) | |
PNA final values are normalized by ideal or adjusted body weight* |