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15 Terms
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Static Compliance (CLstat)
Normal 70-100, 40-60 in vent patient
If less than 25, WOB is high
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Dynamic Compliance (CLdy)
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Airway Resistance (RAW)
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VE
VT x rr
normal 6/L minute
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Vd
Vt - VA
or
VT x %VDPhy
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VA
Alveolar ventilation: (Vt-Vd) x RR
or
VE-VD
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Va
Alveolar Volume
Vt-Vd
8
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PAO2 formula
PAO2 = [PB-PH2O]FiO2 – PaCO2 (1.25)
Pb usually 760, PH2O 47
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a/A ratio
PAO2-PaO2, less than 15-20
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A-a gradient
PaO2/PAO2, 0.8-1.0
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CaO2 Formula
CaO2 = (Hgb*1.34*SaO2) + (PaO2 * 0.003)
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CvO2 Formula
CvO2 = (Hgb*1.34*SvO2) + (PvO2 * 0.003)
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CcO2 formula
CcO2 = (Hgb*1.34) + (PAO2 * 0.003)
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QS/QT formula
QS/QT = (C(a-v)O2 / CcO2)
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Note 
Flashcards (105)