Altogether 19 patients with chronic laryngo- and tracheostenosis of different etiology were investigated. All the patients were broken into 3 groups (1--less than 1 year, 2-1-3 years, 3--over 3 years) with regard to the time of canulla bearing. The patients were examined with 99mTc-human serum albumin particles. Major disorders in the capillary blood supply of both lungs were detected. These changes were focal-diffuse. Abnormalities were mainly observed in the apical area of both lungs and in the mediastinal zone. Redistribution of the pulmonary blood supply in the direction of the upper parts of the lungs was revealed. Lung abnormalities increased depending on the time of canulla bearing.
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