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Multiple Choice: Chapter 22 Pulmonary function tests Question 22.1. When trying to determine whether a breathless patient has obstructive or restrictive pulmonary disease a it is necessary to make measurements of airway resistance and lung compliance b a peak expiratory flow rate above the predicted value indicates restrictive disease c the most useful test is the forced expiratory spirogram (exhaled volume vs. time) d inspiratory wheezing would be expected in obstructive pulmonary disease.