Respiratory

Question 1

Give examples of causes of increased lung compliance:

Answer 1

• Old age
• Emphysema - through loss of alveoli and associated elastic tissue

Question 2

Give examples of decreased lung compliance:

Answer 2

• Kyphosis
• Pulmonary fibrosis
• Pneumonectomy
• Pulmonary oedema

Question 3

What is meant by lung compliance?

Answer 3

Lung compliance is defined as change in lung volume per unit change in airway pressure

Question 4

What part of the brain controls autonomic repsiration?

Answer 4

Medulla

Question 5

Where are the peripheral chemoreceptors located?

Answer 5

Bifurcation of the carotids
Aortic arch

Question 6

What is the best investigation for ? possible upper airway compression?

Answer 6

Flow volume loop

In upper airway compression, the flow volume loop will show a flattened expiratory curve and decreased peak expiratory flow rate.

Question 7

Explain the function of a flow volume loop:

Answer 7

This is a graphical representation of the rate and volume of air flow during inspiration and expiration, revealing any narrowing or obstruction of upper airways