Equations Flashcards
1
Q
O2 content
A
CaO2 = (Hgbx1.34xO2 sat) + (0.003xPaO2)
2
Q
Alveolar gas equation
A
PAO2 = (PB - PH2O)FiO2 - PaCO2/0.8
3
Q
PVR
A
PVR = 80(mean PA - PCWP)/CO
4
Q
SVR
A
SVR = 80(MAP-CVP)/CO
5
Q
DO2 (oxygen delivery)
A
DO2 = CI x CaO2
6
Q
CI
A
CI = CO/BSA
7
Q
Mixed venous
A
SvO2 = SaO2 – [(VO2) / (Hgb x 1.36 x CO)]; SaO2: arterial oxygen saturation, VO2: oxygen consumption
8
Q
VO2 (oxygen consumption)
A
(CaO2-CvO2) x CO
9
Q
coronary perfusion pressure
A
CPP = DBP - LVEDP
10
Q
Henderson-Hasselbach
A
pka = pH -log [base-]/[acid+]
11
Q
maximal allowable blood loss
A
MABL = EBV[(starting Hct - target Hct)/starting Hct]
12
Q
pRBCs volume to infuse
A
EBV[(target Hct-starting Hct)/(donor Hct-target Hct)]
13
Q
pacemaker
A
Paced, sensed, response (I/T), rate modulation, multisite pacing
14
Q
Dead space
A
(PaCO2 - PETCO2)/PaCO2
