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Difficulty: Very hardPediatric Gastrointestinal Disorders

A 14-day-old term male infant is brought to the emergency department due to acute onset of irritability and three episodes of bright green emesis over the past 4 hours. The infant was born at 39 weeks gestation without complications and had been feeding well until today. Vital signs are within normal limits for age. Physical examination reveals a soft, non-distended abdomen without palpable masses, guarding, or erythema. There is no hemodynamic instability. Assuming this patient proceeds through standard evaluation and requires surgical intervention for the most likely underlying etiology without evidence of bowel perforation at any stage, arrange the following diagnostic and therapeutic steps in the correct chronological sequence.

  1. 1Initiation of strict nil per os (NPO) status, fluid resuscitation, and placement of a nasogastric tube.
  2. 2Acquisition of an anteroposterior and cross-table lateral plain abdominal radiograph.
  3. 3Fluoroscopic upper gastrointestinal (UGI) contrast series to assess duodenal configuration.
  4. 4Emergent pediatric surgical consultation and exploratory laparotomy.
  5. 5Counterclockwise detorsion of the midgut, division of peritoneal bands, and prophylactic appendectomy.

Answer

The correct chronological sequence is: 1) NPO status and nasogastric tube placement, 2) Plain abdominal radiograph, 3) Upper GI contrast series, 4) Exploratory laparotomy, 5) Ladd procedure (counterclockwise detorsion and appendectomy).
The standard diagnostic algorithm for a stable neonate presenting with bilious emesis begins with immediate cessation of enteral feeds and nasogastric decompression to prevent aspiration. A plain abdominal radiograph is then mandatory to rule out pneumoperitoneum. Once perforation is ruled out, an upper gastrointestinal contrast series is performed to definitively diagnose malrotation with midgut volvulus. After diagnosis, the patient is taken for an emergent exploratory laparotomy, where the classic Ladd procedure is executed. The critical steps of the Ladd procedure include counterclockwise detorsion of the bowel, division of the peritoneal (Ladd's) bands, broadening of the mesenteric base, and a prophylactic appendectomy.

Step-by-Step Solution

1
Hemodynamic stabilization and gastric decompression.
Prevents aspiration, stabilizes the patient, and decompresses the proximal gastrointestinal tract.
Bilious emesis in a neonate is a surgical emergency indicating distal obstruction (most dangerously, midgut volvulus) until proven otherwise; securing ABCs and decompression is paramount.
2
Perform plain abdominal radiography (KUB).
Evaluates for free intraperitoneal air or pathognomonic signs of other atresias (e.g., double-bubble sign).
Contrast studies are strictly contraindicated if there is a bowel perforation. KUB safely rules this out before proceeding to definitive imaging.
3
Perform an upper GI contrast series.
Visualizes the abnormal placement of the ligament of Treitz or the 'corkscrew' sign of the duodenum.
UGI is the most accurate diagnostic test for malrotation in a hemodynamically stable patient without evidence of perforation.
4
Proceed to exploratory laparotomy.
Allows direct visualization of the ischemic or twisted midgut.
Definitive treatment of midgut volvulus is entirely surgical; delay can result in loss of the entire small bowel.
5
Execute the Ladd procedure.
Anatomical correction of the malrotation and prevention of recurrence.
Because the midgut twists clockwise in volvulus, counterclockwise detorsion restores perfusion. Division of bands relieves obstruction, and appendectomy prevents future diagnostic dilemmas regarding atypical appendicitis.

Key Concept

Evaluation algorithm for neonatal bilious emesis and the surgical management sequence of malrotation with midgut volvulus.
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Topics

Pediatric Gastrointestinal Disorders

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