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10 Cards in this Set

  • Front
  • Back
What is the shunt equation?
Qs/Qt = (CcO2-CaO2)/(CcO2-CvO2)
How is CcO2 calculated?
Same as CaO2, using PAO2 and corresponding Sat.
What is CcO2?
End-capillary O2
How bad must a shunt be to be incompatable with spontaneous ventilation?
>30%
What level of shunt is acceptable?
<20%
What is normal physiologic shunt?
5%
What vessels contribute to physiologic shunt?
Thebesian, Bronchial and pleural vessels
What is a normal V/Q?
0.8
What is normal alveolar ventilation?
4L/min
Can V/Q mismatch be corrected w/ increased FiO2?
Somewhat