equations Flashcards
1
Q
total blood oxygen content/DO2 equation
A
DO2 (ml/kg) = CO (l/min) x (1.34 (ml/gr) x Hgb (gr/L) x SaO2 (Hgb O2 sat expressed as fraction) + (0.003 (O2 gas dissolved in 100ml of blood)x PaO2 (amount of O2 dissolved in blood in ml)
2
Q
carbonate buffering equation
A
H⁺ + HCO3⁻ 🔁 H2CO3⁻ 🔁 H2O + CO2
3
Q
O2 extraction ratio
A
O2ER = VO2 / DO2 = (SaO2-SvO2) / SaO2
4
Q
CPP
A
CPP = MAP - ICP (goal 60-70mmHg)
5
Q
CBF
A
CBF= ICP/CVR
CBF = (CAP - JVP) ÷ CVR
6
Q
how is ICP measured
A
bolt or catheter (normal 5-15 mmHg)
7
Q
cerebral oxygen delivery equation
A
CBrO2 = CBF x CaO2
8
Q
How much should PH decreases by for every increase in 10 of PaCO2
A
0.8
