All Semester 2 RT equations
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| Time Constant | Kt= CL x Raw
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| Stroke Volume | SV= C.O./H.R.
Normal: 60-130 mL
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| SVR (Systemic Vascular Resistance) | SVR= MAP-CVP/CO X 80
Normal: 800-1500 dynesxsec
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| PVR (Pulmonary Vascular Resistance) | PVR= MEAN PAP-PCWP/CO X 80
Normal: 120-240
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| Total Oxygen Delivery | Do2= C.O. x (CaO2x10)
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| Oxygen Extraction Ratio | O2 E.R.= CaO2-CvO2/CaO2
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| Shunt Calculation | CcO2-CaO2/Cco2-CvO2; then multiply by 100 for a %
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| Deadspace | VD/Vt= PaCO2-PECO2/PaCO2
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| Minute Ventilation | VE= RR X VT
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| A-a gradient | PAO2= FIO2 x (PB-47)-PaCO2/0.8 or PAO2= FIO2 x (PB-47)-PaCO2 if FIO2 greater than 60% don’t use 0.8 or shortcut FIO2 x 7 – CO2; then subtract from given PaO2.
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| Static Compliance | Plat-Peep/VT
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| Dynamic Compliance | Peak-Peep/Vt
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| Resistance | Peak-plat/flow
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| P/F ratio | PaO2/FiO2
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| Total Cycle Time (I:E RATIO) | Ti-Te= TCT
TCT-Ti=Te
TCT-Te=Ti
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