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Vomiting and Gastric Motility in Early Brain Damaged Children With Congenital Zika Syndrome

Objectives: This study investigated the occurrence of vomiting and gastric dysmotility in dysphagic children with congenital Zika syndrome (CZS) and assessed possible associations of these findings with the severity of dysphagia and the presence of tube feeding. Methods: Forty-six children with CZS were assessed for dysphagia, and the occurrence of vomiting, dietary volume tolerance <15 mL/kg, and feeding time per meal >30 minutes were evaluated. Gastric antrum ultrasonography was used to detect the frequency of contractions and measure antral areas (at fasting and 15 minutes postprandial), from which the gastric emptying rate (GER) was calculated. Antral ultrasonography findings were compared with those of ten healthy controls. Vomiting and gastric motility were compared between CZS patients according to the severity of dysphagia and the requirement for tube feeding. Results: Overall, 76% (35/46) of children with CZS had moderate-to-severe dysphagia (MSD), among whom 60% (21/35) were tube fed [MSD tube fed (MSDTF)]. Vomiting occurred in 54% (25/46) of children, whereas dietary volume intolerance and prolonged feeding time were observed in 59% (27/46) and 37% (17/46), respectively, most frequently in MSDTF patients. On ultrasound, 61% (28/46) of children with CZS had no antral contractions, whereas 90% (9/10) of controls did. Compared to healthy controls, GER was eight-fold lower in children with CZS and 60-fold lower in MSDTF children. Conclusions: In dysphagic children with CZS, vomiting, volume intolerance, and prolonged feeding time were frequent and possibly associated with impaired antral contraction and delayed gastric emptying, especially in cases of severe dysphagia and tube feeding.