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Difficulty: MediumNeonatal Disorders

A 4-day-old term male neonate is brought to the emergency department due to repeated episodes of dark green vomiting over the past 4 hours. The infant has been exclusively breastfed and previously tolerated feeds without difficulty. Vital signs reveal a heart rate of 170/min, respiratory rate of 48/min, and blood pressure of 65/40 mm Hg. Physical examination shows a fussy neonate with a mildly distended abdomen and dry mucous membranes. Arrange the following steps in the most appropriate chronological order for the evaluation and management of this patient's condition.

  1. 1Initiate intravenous fluid resuscitation and nasogastric decompression
  2. 2Obtain a plain abdominal radiograph to evaluate for free intraperitoneal air
  3. 3Perform an upper gastrointestinal contrast series to visualize the duodenojejunal junction
  4. 4Proceed with emergent exploratory laparotomy and Ladd procedure

Answer

The correct sequence is to first initiate intravenous fluid resuscitation and nasogastric decompression, followed by obtaining a plain abdominal radiograph, then performing an upper gastrointestinal contrast series, and finally proceeding with an emergent exploratory laparotomy.
The evaluation of neonatal bilious emesis follows a strict algorithmic approach to rapidly identify surgical emergencies while minimizing harm. The neonate must first be hemodynamically stabilized (intravenous fluids) and decompressed (nasogastric tube) to prevent aspiration. Following stabilization, a plain abdominal radiograph is mandatory to rule out a perforated bowel. Because the plain film in malrotation is often non-diagnostic (showing a normal or gasless abdomen), an upper gastrointestinal contrast series is then required to definitively diagnose the condition by identifying an abnormally placed duodenojejunal junction. Once the diagnosis of malrotation with volvulus is established, emergent surgical intervention via the Ladd procedure is the definitive treatment to restore bowel perfusion.

Step-by-Step Solution

1
Hemodynamic stabilization and bowel decompression
The patient's intravascular volume is restored and the stomach is decompressed to prevent aspiration.
Bilious emesis is a sign of intestinal obstruction. Dehydration and potential shock must be addressed first before sending the infant for diagnostic imaging.
2
Plain abdominal radiography
Assesses the abdomen for pneumoperitoneum or the classic 'double bubble' sign.
It is critical to rule out a perforated viscus before administering contrast. If free air is present, contrast studies are strictly contraindicated.
3
Upper gastrointestinal contrast series
Visualizes the anatomy of the upper GI tract, specifically looking for an abnormally placed ligament of Treitz or a 'corkscrew' appearance.
This is the most sensitive and specific study to diagnose malrotation and midgut volvulus when the plain film does not show free air.
4
Surgical intervention (Ladd procedure)
Definitive treatment via exploratory laparotomy to resolve the obstruction.
Emergent surgery is required to untwist the volvulus, divide the Ladd bands, and broaden the mesenteric base to prevent recurrent ischemia and bowel necrosis.

Key Concept

Algorithm for the evaluation and management of neonatal bilious emesis
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Topics

Neonatal Disorders

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