Pneumologia SBPT Practice Questions - Título De Especialista Em Pneumologia E Tisiologia (Sociedade Brasileira De Pneumologia E Tisiologia AMB) Exam

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A 52-year-old man with systemic sclerosis undergoes pulmonary function testing. Spirometry shows FEV1 58% of predicted, FVC 54% of predicted, and FEV1/FVC ratio 0.82 (normal). To formally confirm a restrictive ventilatory defect, which measurement on body plethysmography is mandatory?

Total Lung Capacity (TLC) below the lower limit of normal (< LLN or < 80% of predicted). Residual Volume (RV) below 65% of predicted with preserved Vital Capacity. Functional Residual Capacity (FRC) below 70% of predicted combined with normal airway resistance. Diffusing capacity of the lung for carbon monoxide (DLCO) below 60% of predicted.

Correct Answer:

Total Lung Capacity (TLC) below the lower limit of normal (< LLN or < 80% of predicted).

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