2017.1 : SAQ 11

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)

We see a lot of patients with pulmonary function tests, their associated curves and parameters. Understanding the physiology, aids interpretation of the results.

BT_PO 1.20

A vital capacity breath is from expiratory reserve volume (ERV) to total lung capacity (TLC)  TRUE/FALSE

The effort independent component is due to dynamic airways closure TRUE/FALSE

The TLC is increased in obstructive lung disease TRUE/FALSE

The effort independent component is steeper in restrictive lung disease TRUE/FALSE

A normal peak expiratory flow rate would be 10 L/min TRUE/FALSE

 

 

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