things to study quickly Flashcards
1
Q
Equation for Vd [dead space]
A
Vd = Vt * (PaCO2 - PeCO2)/PaCO2
2
Q
what is normal Vd? normal Vt? normal ratio?
A
- Vd = 0.15 L
- Vt = 0.45 L
- Vd/Vt = 33%
3
Q
What is equation for PVR?
A
PVR = (mPAP - mLAP)/CO
4
Q
What is equation for alveolar ventilation?
A
VA = (Vt - Vd) * RR
5
Q
What is normal alveolar ventilation?
A
4.2 L/min
6
Q
What is equation for PAO2? Normal values for Patm/PH2O/R?
A
PAO2 = FIO2 [fraction inspired O2] *(Patm - PH2O) - PACO2/R
normal Patm: 760, normal PH2O: 47, normal R: 0.8
7
Q
Equation for O2 content of blood?
A
O2 content = (1.34 * conc Hb * % sat] + (0.003 * PaO2]
