SCENARIOS OF THE COURSE OF BRONCHOPULMONARY DYSPLASIA IN PREMATURE INFANTS WITH PATENT DUCTUS ARTERIOSUS IN FOLLOW-UP TO 3 YEARS

Abstract

Summary. Bronchopulmonary dysplasia (BPD) is one of the most common long-term complications associated with preterm birth. The severity of BPD is associated with immaturity of a child's body, perinatal infections, and patent ductus arteriosus (PDA).The aim of the study was to identify the features of BPD in the 1st year of life of a child and in the follow- up to 3 years, depending on the condition of the ductus arteriosus.Material and methods. The observations of 146 premature infants with BPD, who were divided into groups depending on the state of the ductus arteriosus, were analyzed: Group I consisted of 58 children with BPD whose ductus arteriosus closed spontaneously in the early neonatal period; II group – 60 children with hemodynamically insignificant PDA, which remained open for 6-12 months; III group – 28 children with hemodynamically significant (HS) PDA, which required surgical closure during the stay of a child in the perinatal center. Results. There were significantly more cases of severe BPD among children of group II compared to group I: 23.3 vs. 8.6 % (p <0.01) and, accordingly, fewer cases of moderate course: 41.7 vs. 58.6 % (p <0.05) at the stage of children treatment in the perinatal center. At the age of 3 years, there were significantly more healthy children who underwent BPD in group I compared to group III: 62.5 vs. 25.9 % (p <0.01), and severe course was significantly more common in both groups II and III compared to group I: 6.8 and 7.4 % vs. 0 % (p <0.01). No significant differences in the severity of BPD at the age of 2-3 months and in the follow-up to 1 year from the date of surgical closure of HS PDA were detected. Conclusions. Sexual dimorphism was found, namely the prevalence of males among preterm infants with delayed closure of the ductus arteriosus. The presence of hemodynamic disorders connected with PDA is associated with a more severe course of BPD at the age of 3 years compared to children whose ductus arteriosus closed on its own in the early neonatal period. At the average term of surgical closure of PDA 21.5 ± 1.6 days of life, significant differences in the severity of BPD from the term of surgical closure of PDA weren`t detected.