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Feed intolerance in preterm neonates with antenatal reverse end diastolic flow (REDF) in umbilical artery: a
Abhishek Somasekhara Aradhya1, Kanya Mukhopadhyay1, Shiv Sajan Saini1
1Department of Pediatrics, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Insights
Feed intolerance is common in neonates with antenatal reverse end-diastolic flow (REDF), but the risk of necrotizing enterocolitis (NEC) is not significantly elevated. Early enteral feeding can be safely initiated in these infants with careful monitoring.
Area of Science:
- Neonatalogy
- Perinatology
- Gastroenterology
Background:
- Antenatal absent or reverse end-diastolic flow (AREDF) in growth-restricted infants is linked to feed intolerance.
- Reverse end-diastolic flow (REDF) is presumed to cause more severe feeding issues, but its natural history is poorly understood.
Purpose of the Study:
- To investigate the incidence of feed intolerance and necrotizing enterocolitis (NEC) in preterm neonates diagnosed with antenatal REDF.
- To assess the time to achieve full enteral feeding in this population.
Main Methods:
- Retrospective cohort study of preterm infants (<37 weeks gestation) with antenatal REDF diagnosed between January 2015 and September 2017.
- Primary outcomes included feed intolerance, NEC, and time to full enteral feeding (150 ml/kg/day).
Main Results:
- Of 48 eligible neonates, 45% experienced feed intolerance, requiring temporary cessation of feeds.
- Full enteral feeds were achieved by a median age of 9 days.
- Only 6% of neonates developed NEC (Bell's stage 2 or higher).
Conclusions:
- Feed intolerance is a frequent complication in neonates with antenatal REDF.
- The risk of developing NEC in this cohort is not higher than in cases of absent end-diastolic flow (AEDF).
- Early enteral feeding (around 24 hours) appears safe in REDF infants without abdominal symptoms.
Abstract:
Background: Feed intolerance is common in growth-restricted infants with antenatal AREDF (absent or reverse end-diastolic flow) and presumed to be more severe in those with reverse end diastolic flow (REDF). Natural history of feeding in REDF is rarely reported in the literature.Aims and objectives: To determine the incidence of feed intolerance and necrotizing enterocolitis (NEC) in neonates with antenatal REDF.Design: Preterm inborn neonates with gestation <37 weeks with antenatal REDF diagnosed between January 2015 and September 2017 were included in this retrospective cohort study. The primary outcome was the proportion of neonates having feed intolerance and NEC till discharge or death or transfer to other hospitals and time to achieve full enteral feeding (150 ml/kg/day).Results: Out of total 67 born with antenatal REDF, 8 were transferred out within 48 hours, 8 records not available and 4 excluded due to major malformations. The mean (SD) gestation and birth weight of the remaining 48 neonates were 32 (2) weeks and 1096 (291) g. The median (IQR) age of initiation of feeds was 30 (24-37) hours. Feeds were advanced by median (range) 20 (10-20) ml/kg/day in which 22 babies (45%) had at least 1 episode of feed intolerance at a median (IQR) age of 79 (40-120) hours requiring nil per oral for next 48 (18-96) hours. Full feeds were reached by median age (IQR) of nine (8-12) days. Only 3 neonates (6%) had NEC stage 2 or above as per Bell's staging.Conclusions: Feed intolerance is common in neonates with REDF though the risk of NEC is not high.What is known on this subject?Neonates with antenatal AREDF are at increased risk of feed intolerance and necrotizing enterocolitis.Early introduction of enteral feeds in neonates with AREDF with appropriate monitoring is safe without increased risk of necrotizing enterocolitis.AEDF which progresses to REDF is associated with increased morbidity.What does this study add?Early enteral feeding as early as 24 hours can be initiated in REDF if there are no abdominal symptoms and signs.Feed intolerance is high in REDF cases.The risk of NEC is not higher than what is seen in AEDF cases.
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