Paeds · fetal-neonatal-and-perinatal
Bilious vomiting and neonatal intestinal obstruction
Also known as Neonatal bowel obstruction · Duodenal atresia · Malrotation with midgut volvulus · Jejunoileal atresia · Meconium ileus · Hirschsprung disease presenting in the newborn
Fellowship guide to bilious vomiting and neonatal intestinal obstruction: why green vomit demands an obstructive and surgical explanation, the proximal-versus-distal causes (duodenal atresia, malrotation with volvulus, jejunoileal atresia, meconium ileus, Hirschsprung disease, anorectal malformation), the resuscitation-first and decompression pathway, the contrast-study decision tree, definitive condition-specific surgery, and the time-critical volvulus trap.
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Target exams
Red flags
- Any green or yellow (bilious) vomit in a newborn — obstruction until proven otherwise
- Bilious vomiting with abdominal distension, visible loops or failure to pass meconium
- Sudden bilious vomiting with shock, peritonitis or abdominal wall discolouration — midgut volvulus with ischaemia
- Bilious vomiting plus a scaphoid or empty abdomen and bloody stools — midgut volvulus
- Down syndrome infant with bilious vomiting — duodenal atresia until excluded
- Delayed passage of meconium beyond 48 hours with vomiting and distension — Hirschsprung disease
Life stages
Care settings
Clinical exam formats
Board mappings
- Recognition of bilious vomiting as a surgical emergency
- Immediate management: NPO, nasogastric decompression, fluid resuscitation
- Neonatal obstruction: clinical signs and when to image
- Proximal versus distal obstruction: differential and radiology
- Malrotation with midgut volvulus: diagnosis, Ladd procedure and ischaemia risk
- Atresias, meconium ileus and Hirschsprung: condition-specific surgery
- Applied embryology of midgut rotation and atresia formation
- Contrast study selection: upper GI series versus contrast enema
- Neonatal fluid and electrolyte management during bowel decompression
- Short case: bilious vomiting with a double-bubble radiograph
- Communication: antenatal counselling and postnatal surgical planning for duodenal atresia
- Neonatal surgery: bilious vomiting and intestinal obstruction
- Recognition and stabilisation of the surgical newborn
- Common neonatal surgical conditions and their management
- Embryology and pathology of intestinal atresia and malrotation
- Radiological diagnosis: double bubble, microcolon, transition zone
- Cystic fibrosis and meconium ileus: screening and surgical management
- Surgical newborn scenario station
- Communication: breaking bad news around a volvulus emergency
- Neonatal intestinal obstruction: recognition and management
- Bilious emesis in the newborn: differential diagnosis
- Surgical emergencies of the newborn: volvulus, atresia, meconium ileus
- Patient Care: stabilisation of the newborn with bilious vomiting
- Medical Knowledge: embryology and pathology of congenital bowel obstruction
- Systems-Based Practice: neonatal surgical retrieval and tertiary transfer
- Medical Expert: neonatal intestinal obstruction
- Collaborator: neonatal surgical team during a volvulus emergency
- Health Advocate: equity of access to neonatal surgical services
Overview & Definition
A newborn brings up a green-stained vomit on the postnatal ward. Within minutes the question becomes narrow and urgent: is the bowel obstructed, and if so where? Neonatal intestinal obstruction presenting with bilious vomiting is the clinical syndrome caused by a mechanical blockage of the gut distal to the ampulla of Vater, where bile enters the duodenum. Because bile cannot travel backward past a distal obstruction, its appearance in the vomit is the single most reliable bedside marker that the gut is blocked somewhere downstream. [1] [10]
The obstruction may be intrinsic (atresia, stenosis, web, meconium plug), extrinsic (Ladd bands, annular pancreas), or functional (aganglionosis in Hirschsprung disease). What unifies them is the consequence: proximal bowel distends, peristalsis reverses, and bile-stained gastric and intestinal content is expelled. The clinical challenge is not whether to investigate — every bilious vomit is investigated — but to triage the causes that can kill within hours (midgut volvulus, ischaemia) from those that allow a measured workup (duodenal atresia, Hirschsprung). [5] [10]
The fellowship candidate should hold three frames simultaneously. First, beyond the ampulla — the anatomical reason bile means obstruction. Second, proximal versus distal — proximal obstruction vomits early with little distension, distal obstruction distends and fails to pass meconium. Third, time-critical versus elective — volvulus is a same-hour emergency, duodenal atresia can wait for a planned operation the next day. The management pathway, the imaging choice, and the counselling of parents all flow from holding these three frames. [1] [5]
References14ShowHide
- [1]Godbole P, Stringer MD Bilious vomiting in the newborn: How often is it pathologic? J Pediatr Surg, 2002.PMID 12037761
- [2]Lee RA, Dassios T, Bhat R Bilious Vomiting in the Newborn: A Three-Year Experience in a Tertiary Medical and Surgical Centre. Case Rep Pediatr, 2020.PMID 33110665
- [3]Dalla Vecchia LK, Grosfeld JL, West KW Intestinal atresia and stenosis: a 25-year experience with 277 cases. Arch Surg, 1998.PMID 9605910
- [4]Patterson KN, Cruz S, Nwomeh BC Congenital duodenal obstruction - Advances in diagnosis, surgical management, and associated controversies. Semin Pediatr Surg, 2022.PMID 35305801
- [5]Svetanoff WJ, Srivatsa S, Diefenbach K Diagnosis and management of intestinal rotational abnormalities with or without volvulus in the pediatric population. Semin Pediatr Surg, 2022.PMID 35305800
- [6]Birajdar S, Rao SC, Bettenay F Role of upper gastrointestinal contrast studies for suspected malrotation in neonatal population. J Paediatr Child Health, 2017.PMID 28425590
- [7]Haricharan RN, Georgeson KE Hirschsprung disease. Semin Pediatr Surg, 2008.PMID 19019295
- [8]Short SS, Durham MM, Rollins MD Hirschsprung disease outcomes. Semin Pediatr Surg, 2022.PMID 35690462
- [9]Sathe M, Houwen R Meconium ileus in Cystic Fibrosis. J Cyst Fibros, 2017.PMID 28986020
- [10]Hajivassiliou CA Intestinal obstruction in neonatal/pediatric surgery. Semin Pediatr Surg, 2003.PMID 14655163
- [11]Baad M, Delgado J, Dayneka JS Diagnostic performance and role of the contrast enema for low intestinal obstruction in neonates. Pediatr Surg Int, 2020.PMID 32572600
- [12]Ziegler MM Meconium ileus. Curr Probl Surg, 1994.PMID 8062591
- [13]Ali Almoamin HH, Kadhem SH, Saleh AM Annular pancreas in neonates; Case series and review of literatures. Afr J Paediatr Surg, 2022.PMID 35017379
- [14]Tobias J, Tillotson M, Maloney L Meconium Ileus, Distal Intestinal Obstruction Syndrome, and Other Gastrointestinal Pathology in the Cystic Fibrosis Patient. Surg Clin North Am, 2022.PMID 36209752