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SPC Mech Vent Equa

SPC Mechanical Ventilation Equations

QuestionAnswer
Deadspace Vd/Vt = PaCO2-PeCO2/PaCO2
P/F Ratio PaO2/FiO2
PAO2 FiO2(713)-PaCO2/.8 [don't use .8 if FiO2 > 60%]
A-a Gradient FiO2(713)-PaCO2/.8 = PAO2 - PaO2
TCT 60/rr
I:E Ratio TCT - [I/E time] = I/E time --- I:E (simplified)
Minute Ventilation (Ve) Vt x rr
Static Compliance (Cs) Vt/Plat - Peep
Dynamic Compliance (Cd) Vt/Peak - Peep
Resistance (Raw) Peak - Plat/flow
RSBI f/Vt
O2 Content (1.34 x Hb x SaO2) + (PaO2 x 0.003)
Cylinder Duration Tank Pressure x Tank Factor / L/m
Alveolar Ventilation (Va) (Vt - Vd) x rr = Va
Air:O2 Ratio & Total Flow 100 - FiO2 / FiO2 - 21 = Air:O2 ratio x flowrate = ___Total Flow
Shunt (Qs/Qt) CcO2 - CaO2 / CcO2 - CvO2 = Qs/Qt = ___%
Created by: vgflgirl
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