things to study quickly

Question 1

Equation for Vd [dead space]

Answer 1

Vd = Vt * (PaCO2 - PeCO2)/PaCO2

Question 2

what is normal Vd? normal Vt? normal ratio?

Answer 2

• Vd = 0.15 L
• Vt = 0.45 L
• Vd/Vt = 33%

Question 3

What is equation for PVR?

Answer 3

PVR = (mPAP - mLAP)/CO

Question 4

What is equation for alveolar ventilation?

Answer 4

VA = (Vt - Vd) * RR

Question 5

What is normal alveolar ventilation?

Answer 5

4.2 L/min

Question 6

What is equation for PAO2? Normal values for Patm/PH2O/R?

Answer 6

PAO2 = FIO2 [fraction inspired O2] *(Patm - PH2O) - PACO2/R

normal Patm: 760, normal PH2O: 47, normal R: 0.8

Question 7

Equation for O2 content of blood?

Answer 7

O2 content = (1.34 * conc Hb * % sat] + (0.003 * PaO2]