Respiratory Tests

Suggested Level of Knowlege: Good


BT_RT 1.39 Interpret blood gas analysis in respiratory failure

BT_SQ 1.6 Describe the methods of measurement applicable to anaesthesia, including clinical utility, complications and sources of error in particular:

· SI units

· Measurement of volumes, flows, and pressures, including transducers.

· Measurement of blood pressure

· Measurement of cardiac output

· Measurement of temperature

· Oximetry

· Gas analysis, including capnography

· Methods used to measure respiratory function, including:

– Forced expiratory volume

–  Peak expiratory flow rate

–  Vital capacity

–  Flow-volume loops

–  Functional residual capacity and residual volume

Past SAQs

2017.1 Draw an expiratory flow volume curve obtained from a maximal expiratory effort after a vital capacity breath, for a person with :

a. normal lungs

b. restrictive lung disease

c. obstructive lung disease

(10 marks)

Explain how and why these curves (and the derived parameters) are different in each disease state (15 marks)

2000.1 Draw an expiratory flow volume curve for a forced expiration from total lung capacity. Describe its characteristics in people with normal lungs,

as well as those with obstructive and restrictive lung disease.

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26 Sep 2017