A 9-day-old boy is brought in limp and quiet, his diaper stained with a streak of green that catches the overhead light. He had been feeding well until an hour ago, when he suddenly drew up his legs, cried hard, and then went eerily still. His belly is only mildly distended, but the nurse says his heart rate has climbed and he looks “not right.” You place a hand on the warmer and wonder what you can’t afford to miss.
— What’s your move? Read on.
Before you read
- What finding makes bilious emesis a surgical emergency until proven otherwise?
- What do you do in the first 15 minutes before imaging is even finished?
When to Think of It
Think malrotation/volvulus in any neonate or infant with bilious emesis, sudden irritability or lethargy, abdominal distension, bloody stool, shock, or pain out of proportion to exam. The alarm bell is green vomit in a young child until proven otherwise.
Sick or Not Sick
The fork is stable malrotation vs. ischemic volvulus. If there are signs of shock, peritonitis, hematochezia, metabolic acidosis, or severe persistent pain, treat as volvulus and get surgery immediately.
The First Fifteen Minutes
- NPO + immediate pediatric surgery consult — because this may be a surgical bowel ischemia emergency.
- IV or IO access, fluid bolus 20 mL/kg isotonic crystalloid; repeat as needed — because perfusion to threatened bowel and shocked child must be restored.
- If significant pain/distress: fentanyl 1–2 mcg/kg IV/IN — because analgesia is humane and does not “mask” volvulus.
- If ongoing emesis or aspiration risk: ondansetron 0.15 mg/kg IV/PO once (max 8 mg) — because it reduces vomiting while you stabilize and image.
- If toxic, febrile, peritoneal, or concern for ischemic bowel/perforation: broad-spectrum antibiotics now such as piperacillin-tazobactam 80 mg/kg/dose piperacillin component IV q6h (max 4.5 g/dose) — because transmural injury can seed bacteremia.
- Place NG/OG tube for decompression if distended or actively vomiting — because it lowers aspiration risk and gastric pressure.
- Urgent imaging if stable enough: abdominal radiograph and upper GI contrast study are typical diagnostic steps; in an unstable child, do not delay OR for perfect imaging.
Definitive Care & Disposition
Definitive treatment is operative correction (often Ladd procedure) with detorsion if volvulus is present. All suspected volvulus needs admission, and any unstable, peritoneal, or ischemic patient goes directly to the OR; ICU after surgery is common if shock or bowel loss occurred.
How This One Kills
The killer error is sending a bilious-vomiting infant for routine workup or discharge while the bowel twists ischemically. Delay converts salvageable bowel into short-gut syndrome or death.
The Differential — What Else Looks Like This
- Gastroenteritis — diarrhea and sick contacts point away; confusing it with volvulus delays surgery and can cost bowel.
- Pyloric stenosis — classically nonbilious projectile vomiting in a younger infant; missing volvulus means you ignore a surgical ischemia emergency.
- Sepsis/meningitis — lethargy and poor feeding overlap; confusing them can delay decompression and operative management.
- Intussusception — episodic pain and currant-jelly stool are clues; confusing it with volvulus can misdirect imaging and operative urgency.
The Second-Day Story
Not every child declares itself with dramatic green emesis. Older infants can present with intermittent pain, feeding refusal, or “reflux” that suddenly worsens; premature or medically complex infants may show only lethargy, tachycardia, or subtle abdominal discoloration. A relatively soft abdomen does not reassure you if the vomiting is bilious or the child looks toxic.
Back to Our Patient
Back to our 9-day-old boy with green emesis and rising heart rate: bilious vomiting in a neonate makes malrotation with midgut volvulus the diagnosis until proven otherwise. He is NPO, resuscitated with a 20 mL/kg isotonic bolus, given fentanyl for distress, decompressed with NG/OG, and the pediatric surgeon is called immediately while imaging is expedited only if it won’t delay the OR. If he has acidosis, peritoneal signs, or instability, he goes straight to operative detorsion and Ladd procedure, then admission to a higher level of care.
Patient Presentation to Attending
How you’d present this patient on the floor — tight, pertinent positives and negatives, no rambling
“This is a 9-day-old male with sudden bilious vomiting and lethargy. He was feeding normally until about an hour ago, then developed green emesis, irritability, and now looks pale and less responsive. No diarrhea, no sick contacts, and no prior abdominal surgery; exam shows mild abdominal distension, tachycardia, and no obvious peritonitis, but he looks ill. I’m worried about malrotation with midgut volvulus causing evolving bowel ischemia. I’ve made him NPO, started IV access and a 20 mL/kg bolus, placed surgery consult stat, and we’re getting an upper GI if it won’t delay definitive management.”
Study Directive
- Draw the malrotation/volvulus pathway from memory: embryology error → narrow mesenteric base → volvulus → ischemia.
- Practice a 30-second “bilious vomiting in infant” script: recognize, resuscitate, consult surgery, avoid delays.
- Review the standard imaging sequence and the circumstances where you skip straight to the OR.
- Write down your institution’s pediatric antibiotic and fluid protocols for suspected ischemic bowel.