Exam Questions - Resp

Question 1

QUESTION 6 (2003)
In obstructive airways disease the most useful long-term measure of disease progression is: 

A. forced expiratory flow 25-75% (FEF25%-75%).
B. forced expiratory flow 50% (FEF50%).
C. forced expiratory volume in one second (FEV1).

D. forced vital capacity (FVC).

E. peak expiratory flow.

Answer 1

C. forced expiratory volume in one second (FEV1)

Question 2

Question 35 (2003)
During intermittent positive pressure ventilation, increasing which of the following (in isolation) would be least likely to improve carbon dioxide removal? 

A. Delivered tidal volume.

B. Inspiratory time.

C. Peak inspiratory pressure.

D. Positive end-expiratory pressure.

E. Ventilator rate.

Answer 2

B.

Question 3

QUESTION 42
In a patient presenting with a severe acute exacerbation of asthma, arterial blood gases on breathing room air show:

PaCO2 31 mmHg [36-44] PaO2 59 mmHg [80-100] pH 7.47 [7.36-7.44]

The hypoxaemia worsens with the administration of an intravenous beta-2 agonist bronchodilator. The PaCO2 is unchanged.

Which one of the following mechanisms best explains the worsening of this patient’s hypoxaemia?

A. Increase in cardiac output.

B. Increase in oxygen consumption by skeletal muscle.

C. Peripheral systemic arterial dilatation.

D. Pulmonary arterial dilatation in low ventilation-perfusion ratio (V/Q) units.

E. Pulmonary vasoconstriction.

Answer 3

?A

Question 4

Question 35 (2003)
During intermittent positive pressure ventilation, increasing which of the following (in isolation) would be least likely to improve carbon dioxide removal? 

A. Delivered tidal volume.

B. Inspiratory time.

C. Peak inspiratory pressure.

D. Positive end-expiratory pressure.

E. Ventilator rate.

Answer 4

D.