Pulmonary ventilation- Volume Flows Dead Space And Preoxygenation

Question 1

What are the three constitutes of dead space ?

Answer 1

1. Equipment apparatus - eg HMEF, face mask, circuits
2. Anatomical - larger conducting airways
3. Alveolar - gas from alveoli which are poorly perfumed eg alveoli which high V/Q ratios

Question 2

What is dead space ?

Answer 2

Volume of inspired air which does not take part in gas exchange and typically makes up 30% of normal tidal volumes