Cardiac output = HR x stroke volume
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CO L/min = 125 mL O
2
/min/M
2
x 100
8.5 {(1.36)(Hgb)(SaO
2
) - (1.36)(Hgb)(SvO
2
)}
Normal CO = 4-6 L/min
Na (mEq) deficit = 0.6 x (wt kg) x (desired [Na] - actual [Na])
SVR = MAP - CVP x 80 = NL 800-1200 dyne/sec/cm
2
CO
L/min
PVR = PA - PCWP x 80 = NL 45-120 dyne/sec/cm
2
CO
L/min
GFR mL/min = (140 - age) x ideal weight in kg
72 (males) x serum creatinine (mg/dL)
85 (females) x serum creatinine (mg/dL)
Creatinine clearance = U creatinine (mg/100 mL) x U vol (mL)
P creatinine (mg/100 mL) x time (1440 min for 24h)
Normal creatinine clearance = 100-125 mL/min(males), 85-105(females)
Body water deficit (L) = 0.6(weight kg)([measured serum Na]-140)
140
Serum Osmolality = 2 [Na] + BUN + Glucose = 270-290
2.8
18
Na (mEq) deficit = 0.6 x (wt kg)x(desired [Na] - actual [Na])
Fractional excreted Na = U Na/ Serum Na x 100 = NL<1%
U creatinine/ Serum creatinine
Anion Gap = Na - (Cl + HCO
3
)
For each 100 mg/dL increase in glucose, Na decreases by 1.6 mEq/L.
Corrected
= measured Ca mg/dL + 0.8 x (4 - albumin g/dL)
serum Ca
+
(mg/dL)
Predicted Maximal Heart Rate = 220 - age
