Physiologic deadspace

Question 1

Vd

Answer 1

Vd=Vt *(PaCO2-PeCO2)/PaCO2

Vt=tidal volume
PaCO2=arterial PCO2
PECO2=expired air PCO2

“Taco, Paco, PEco, Paco”

Question 2

What is physiologic dead space?

Answer 2

Anatomic dead space of conducting airways plus functional dead space in alveoli

Volume of inspired air that does that take part in gas exchange.

Question 3

Biggest contributor of functional dead space

Answer 3

Apex of healthy lung is the largest contributor of functional dead space.