Restrictive lung disease is characterized by which values?

Restrictive lung disease is characterized by a reduction in lung volumes, leading to difficulty in expiring air from the lungs. When evaluating lung function in individuals with restrictive lung disease, both the Forced Expiratory Volume in the first second (FEV1) and Forced Vital Capacity (FVC) are typically reduced; therefore, both values will be less than the normal threshold.

In essence, the key feature of restrictive lung diseases is that patients cannot take in a normal volume of air, which translates into decreased FEV1 and FVC values, meaning both measurements tend to fall below 80% of the predicted value for healthy individuals. This is indicative of a limitation in airflow due to the structural or functional abnormalities in the lungs and/or pleurae.

The other choices suggest values indicative of ventilatory function reflecting obstructive patterns or normal ranges, which do not align with the characteristics of restrictive lung disease. Understanding these distinctions is crucial for correctly identifying the type of pulmonary condition being assessed.