Introduction

Question 1

What is the symbol and value of the concentration in atmospheric air of O2 and CO2?

Answer 1

FiO2 0.209 (20.9%)

Fi CO2 0.0004 (0.04%)

Question 2

What is the symbol and value of the partial pressure in alveolar air of O2 and CO2?

Answer 2

PAO2 13.3 kPa (100 mmHg)

PACO2 5.3 kPa (40 mmHg)

Question 3

What is the symbol and value of the partial pressure in arterial blood of O2 and CO2?

Answer 3

PaO2 13.3 kPa (100 mmHg)

PaCO2 5.3 kPa (40 mmHg)

Question 4

What is the symbol and value of the partial pressure in mixed venous blood of O2 and CO2?

Answer 4

PVO2 5.3 kPa (40 mmHg)

PVCO2 6.1 kPa (46 mmHg)