BRONCHIAL PATENCY IN INFANTS WITH BRONCHOPULMONARY DYSPLASIA

Abstract

The aim of the research was to assess the bronchial patency in infants with bronchial dysplasia with the help of bronchophonography. The data of bronchophonograms of 88 patients diagnosed with bronchopulmonary dysplasia and 30 infants without any respiratory pathology were studied. The main group was divided into 2 subgroups: A group included 22 infants with the classic form of a disease; B group had 66 infants with a new form of bronchopulmonary dysplasia. It was found out that infants with bronchopulmonary dysplasia had increased indicators of the acoustic work of breathing in all frequency diapasons and increased coefficients, which proves the disturbance of the respiratory function in all parts of bronchi. In the infants with the new form, the indicators of the acoustic work of breathing in the low and mid frequency diapason did not differ from the indicators of infants with the classic form, but the indicators in the high frequency diapason were 1.2 times lower than at classical bronchopulmonary dysplasia and the coefficients were 2 times higher. These changes show less expressed obstructive changes at the new form of bronchopulmonary dysplasia in comparison with the classical one. At bronchopulmonary dysplasia of moderate and severe degree there is the disturbance of bronchial patency in all parts of bronchi. Under the new form large bronchi are predominantly damaged. Standard medical therapy leads to the decrease of indicators of acoustic work of breathing in all frequency diapasons. Thus, bronchophonography can be applied for identification of bronchial patency and the severity degree of bronchopulmonary patency and estimation of efficacy of the therapy in infants.