Formulas
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| What is the formula for MAP | (2 x diastolic) + systolic / 3 | ||||
| What is the formula for the Fick equation or cardiac output | QT = heart rate x stroke volume | ||||
| What is the formula for cardiac index | CI = QT/BSA or cardiac output/body surface area | ||||
| What is the formula for pulse pressure | systolic - diastolic | ||||
| What is the formula for stroke volume | SV = CO/hrt rate | ||||
| What is the formula for ejection fraction | ejection fraction = stroke volume / end diastolic volume | ||||
| What is the formula for systemic vascular resistance SVR | SVR = (MAP-CVP)/cardiac output | ||||
| How do you convert Dynes | multiply mmHg/L/min by 80 | ||||
| What is the formula for pulmonary vascular resistance or PVR | PVR = (MPAP - PWP)/ cardiac output | ||||
| PAO2 = | (PB - PH2O)FIO2 - PaCO2/.8 or PaCO2 x 1.25 | ||||
| A-aDO2 = | PAO2 - PaO2 | ||||
| CaO2 = | (Hb x 1.34 x SaO2) + (PaO2 x .003) | ||||
| Oxygen in RBC | (Hb x 1.34 x SaO2) | ||||
| Oxygen in plasma | (PaO2 x .003) | ||||
| CvO2 = | (Hb x 1.34 x SvO2) + (PvO2 x .003) | ||||
| C(a-v)O2 = | CaO2 - CvO2 | ||||
| QT = | VO2/c(a-v)O2 (10) | ||||
| VO2 = | QT x C(a-v)O2 x 10 | ||||
| QS/QT = | (A-aDO2) .003/(A-aDO2) .003 + C(a-v)O2 | ||||
| SaO2 = | PaO2 + 30 | ||||
| VD/VT = | PaCO2 - PECO2/PaCO2 x 100 | ||||
| Clarks rule for drug dose ESD = | wt(lb.) x normal adult dose/150 | ||||
| Drug % x 10 x ml = | number of mg of drug | ||||
| Alveolar ventilation (VA) = | (VT - VD) f | ||||
| dynamic compliance = | exhaled volume/peak inspiratory pressure - PEEP | ||||
| static compliance = | exhaled volume/plateau pressure - PEEP | ||||
| RAW = | peak pressure - plateau pressure | ||||
| Duration of flow (in minutes) = | gauge pressure (psi) x tank factor/liter flow | ||||
| E cylinder = | .28 L/psi (0.3) | ||||
| H cylinder = | 3.14 L/psi (3.0) | ||||
| Air to oxygen ratio FIO2 24 | 25:1 factor 26 | ||||
| Air to oxygen ratio FIO2 28 | 10:1 factor 11 | ||||
| Air to oxygen ratio FIO2 32 | 6:1 factor 7 | ||||
| Air to oxygen ratio FIO2 35 | 4.6:1 factor 5.6 | ||||
| Air to oxygen ratio FIO2 36 | 4:1 factor 5 | ||||
| Air to oxygen ratio FIO2 40 | 3:1 factor 4 | ||||
| Air to oxygen ratio FIO2 60 | 1:1 factor 2 | ||||
| Air to oxygen ratio FIO2 70 | .6:1 factor 1.6 | ||||
| Air to oxygen ratio FIO2 100 | 0:1 factor 1 | ||||
| Total flow = | factor x liter flow |
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Created by:
kaczenskis
on 2010-11-07