GIR formula
(Dextrose % x rate) / (6 x kg)
Lipid calculation if given per volume
(mL/day x 2kcal/mL) / weight kg
Na Deficit
(Desired Na - Current Na) x 0.6 x kg
Anion gap
Na - Cl + HCO3
FENa
(Urine Na x Plasma Cr) / (Urine Cr x Plasma Na)
other format
(Urine Na/ Plasma Na) / (Urine Cr/Plasma Cr)
What is the normal function of aldosterone on K+, Na+, H+, Cl
K = Increase secretion/excretion in urine (hypokalemia)
Na = Increase reabsorption/retention in blood (hypernatremia)
H= increase secretion (metabolic alkalosis)
Cl = increase reabsorption follows sodium
How do you calculate fetal blood loss with Kleihauer-Betke?
% Hb F = (# fetal cells) / (maternal cells) x 100
1% Hb F represents 50 mL fetal blood
Blood volume exchange
Blood volume exchanged = [(observed Hct - desired Hct) / (observed Hct)] x infant’s blood volume (mL)
Desired hct = 55%-60%
