Physiological Dead Space Echo

Question 1

Conducting vs. respiratory zone

Answer 1

Conducting - 0-17…no expsorue to alveoli

Respiratory - 17-23…exposrue

Question 2

Anatomical and physiological dead space

Answer 2

Volume that occupies conducting airways

Part of inhaled that does not participate in gas exchange

Part of exhaled that cannot eliminate CO2

Physiologic = anatomic plus alveolar

Question 3

How to measure physiologcal dead sapce

Answer 3

Amount of CO2 eliminated from lung in as ingle tidal volume and collect one tidal volume and measure meCO2 concentration

Question 4

Important equation

Answer 4

Vd=VT*((PaCO2-PeCO2)/PaCO2)

VCO2 = VtFeCO2=(Vt-Vd)FaCO2