[Clinical significance of the immunochemical study of serum and tissue proteins of the sputum in pulmonary pathology].

The content of normal serum proteins, acute phase (C-reactive protein, pregnancy-associated alpha 2-glycoprotein) and tissue proteins (ferritin, nonspecific tissue esterase) was studied in the sputum of 256 patients with different pulmonary pathology, over time using immunochemical methods. Protein elimination with the sputum was shown to depend upon the nature and gravity of bronchitis and pulmonary destruction. Analysis of the qualitative composition of the sputum proteins and their content can be used in pulmonology for differential diagnosis and assessment of a course of pulmonary diseases.