A respiratory therapist is determining a VD/VT ratio. Which of the following is needed to complete this analysis?
A. FIO2 and PaO2
B. PECO2 and PaCO2
C. PECO2 and PaO2
D. VT and VA
Answer: B. There are two things required to determine a VD/VT ratio - end tidal CO2 and PaCO2.
Health Professions
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