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Difficulty: MediumPediatric Gastrointestinal Disorders

A 3-week-old full-term male is evaluated in the emergency department for sudden onset of bilious (green) vomiting. He has had two episodes in the past four hours. His prenatal course and birth history were unremarkable. On physical examination, the infant is awake and alert. Vital signs are within normal limits for age, and he is hemodynamically stable. The abdomen is soft, non-distended, and non-tender, with normal bowel sounds. Arrange the following steps in the most appropriate chronological order for the evaluation and management of this patient.

  1. 1Discontinue enteral feedings and insert a nasogastric tube for gastric decompression.
  2. 2Obtain a plain abdominal radiograph.
  3. 3Perform an upper gastrointestinal contrast series.
  4. 4Proceed with an exploratory laparotomy and Ladd procedure.

Answer

The correct sequence for managing a hemodynamically stable neonate with bilious emesis is: 1) Nasogastric tube decompression, 2) Plain abdominal radiograph, 3) Upper gastrointestinal contrast series, and 4) Exploratory laparotomy.
The management of a neonate with bilious emesis follows a strict algorithmic approach to quickly identify and treat life-threatening conditions like malrotation and midgut volvulus. The first clinical priority is stabilization and gastric decompression via a nasogastric tube to prevent aspiration of stomach contents. Once stabilized, a plain abdominal radiograph is the crucial initial imaging step to rule out pneumoperitoneum (free air indicating perforation) or to identify other clear diagnoses like the 'double bubble' sign of duodenal atresia. If the plain radiograph does not show free air and does not provide a definitive diagnosis, an upper gastrointestinal contrast series is the next step. It is the gold standard diagnostic test and can accurately diagnose malrotation by demonstrating an abnormal position of the ligament of Treitz or a 'corkscrew' appearance of the duodenum. Once malrotation is confirmed, prompt surgical correction via an exploratory laparotomy and Ladd procedure is required to prevent catastrophic bowel necrosis.

Step-by-Step Solution

1
Ensure hemodynamic stability, discontinue feeds, and place a nasogastric tube.
Gastric decompression and prevention of aspiration.
Bilious emesis in a neonate is a sign of distal obstruction and a potential surgical emergency. Immediate bowel rest and decompression are critical.
2
Obtain an anteroposterior and cross-table lateral plain abdominal radiograph.
Evaluation for pneumoperitoneum or classic obstruction signs.
A plain X-ray must precede any contrast studies to rule out a perforated viscus, which would mandate immediate surgery.
3
Perform an upper GI contrast series.
Assessment of the duodenojejunal junction and ligament of Treitz.
In the absence of free air, this contrast study is the most sensitive and specific test to diagnose malrotation (e.g., corkscrew duodenum).
4
Perform surgical intervention (Ladd procedure).
Correction of the anatomical defect.
Confirmed malrotation requires prompt surgical correction to untwist the bowel, divide Ladd bands, and broaden the mesenteric base to prevent recurrent volvulus.

Key Concept

Management algorithm for neonatal bilious emesis and suspected malrotation
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Topics

Pediatric Gastrointestinal Disorders

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