METHOD OF DIFFERENTIAL DIAGNOSTICS OF CHRONIC OBSTRUCTIVE LUNG DISEASE AND BRONCHIAL ASTHMA Russian patent published in 2013 - IPC A61B6/00 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to pulmonology, and can be used for differential diagnostics of chronic obstructive lung disease (COLD) and bronchial asthma (BA) in case of doubtful clinical-radiological symptoms. For this purpose ventilation-perfusion scintigraphy of lungs is performed. After that alveolar-capillary permeability of radioactive aerosol, apical-basal gradient of perfusion (U/L-q) and apical-basal gradient of ventilation (U/L-v) are determined. Alveolar-capillary permeability of radioactive aerosol is determined at 30-th minute of examination from both lungs. If permeability of inhaled radioactive aerosol is increased up to 25% and higher, with value of apical-basal gradient of ventilation (U/L-v) equal 0.6 and lower, BA is diagnosed. In case of evenly slowed alveolar-capillary permeability of radioactive aerosol from both lungs, and value of apical-basal gradient of perfusion (U/L-q) higher than 0.8, COLD is diagnosed.

EFFECT: method ensures more accurate COLD and BA diagnostics at early stages of development of said diseases.

2 ex, 6 dwg