Incidence and Treatment of Chylothorax in Children Undergoing Corrective Surgery for Congenital Heart Diseases

Nicolle Martin Christofe, Cristiane Felix Ximenes Pessotti, Laércio Paiva, Ieda Biscegli Jatene

Chylothorax is a lymphatic extravasation into pleural cavity and its incidence is 0.25%-5.3% in children undergoing cardiac surgery. To evaluate the incidence of chylothorax in pediatrics patients operated, linking it in each surgical intervention. Evaluate treatment types and efficiency. Retrospective study using medical records of children undergoing cardiac surgery in the Hospital do Coração between 2004 and 2014. For statistical analysis, qualitative variables by absolute frequency and relative frequency; quantitative variables, by median of 25 and 75 percentiles, as they did not present normal distribution (Shapiro-Wilk, P<0.05). The Chi-square test was used for the association between type of treatment and result. The adopted confidence level was 95%. Incidence of chylothorax was 2.1% (0.9% in intracardiac surgery, 1.7% correction of patent ductus arteriosus and aortic coarctation, 8.3% Glenn's surgery, 11.8% total cavopulmonary surgery and 3% in others). Among treatments, fasting associated with total parenteral nutrition (TPN) resolved 51% of the cases. Hypoglossal diet had failed treatment and surgical referral in 22% of the cases. Fasting with TPN associated with octreotide had success in the treatment of chylothorax in a period exceeding 15 days in 78% of cases, and 3.7% were referred for surgery. According to the results, incidence of chylothorax was 2.18%. Treatment with fasting and TPN leads to resolutions in 86.5%, and the association with octreotide was successful in 85.1% of cases, showing an efficient option, while the treatment with hypoglossal diet had therapeutic failure in 22% of the cases in which it was used.