Nephrology equations Flashcards
1
Q
Corrected sodium
A
Corrected sodium
Add 1.6 to each 100 above normal RBS (which is 100 here)
3
Q
Corrected calcium
A
Corrected calcium
- serum calcium + 0.8 * (4 - serum albumin)
- serum calcium + 0.02 * (40 - serum albumin)
4
Q
Anion gap
A
Anion gap
Na - Cl - HCO3
5
Q
Corrected anion gap
A
Corrected anion gap
for every 1 g/dl albumin decrease, increase calculated AG by 3
6
Q
Urinary anion gap
A
Urinary anion gap
(Urinary Na + Urinary K) - Urinary Cl
7
Q
Expected PCO2
A
Expected PCO2
1.5 x HCO3 + 8 ± 2
8
Q
delta-delta
A
delta-delta
(AG - 10) / (24 - HCO3)
- < 1⇒+NAGMA
- > 2 ⇒+met alk
9
Q
Serum osmolality
A
= 2 × serum sodium (mEq/L) + plasma glucose (mg/dL)/18 + blood urea nitrogen (mg/dL)/2.8
10
Q
Fractional excretion of sodium (FENa)
A
FENa = ([urine sodium + serum sodium] + [urine creatinine + serum creatinine]) x 100
