Sat27November0556PM 45

Lung compliance:

True / False

Is increased with pulmonary fibrosis Correct

Static compliance is measured when there is no air flow Correct

Is decreased with pulmonary oedema Correct

Is higher at larger lung volumes Correct

Is decreased with increased pulmonary venous pressure Correct

Explanation

Compliance is decreased with pulmonary oedema, increased venous pressure and pulmonary fibrosis.

Compliance describes the ability of the lung to stretch. It is the volume change per unit change in pressure. At resting lung volumes the compliance curve is steep, meaning that for a small change in pressure there is a large volume change.

At higher lung volumes the curve is flatter meaning there is a smaller change in volume for the same pressure change. Compliance is hence smaller at higher lung volumes.

Normal lung compliance is 200 ml/cmH2O and combined lung and chest wall compliance is normally about 70-80 ml/cmH2O.

Answer Statistics

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Average score: 85.83%

Times answered: 247