Examkin

Question

Difficulty: MediumPediatric Gastrointestinal Disorders

A 4-day-old term female infant is brought to the emergency department by her parents due to multiple episodes of green-tinged vomiting that began 6 hours ago. She has been exclusively breastfed and previously had normal stooling and wet diapers. Her temperature is 37.1°C (98.8°F), heart rate is 148/min, respiratory rate is 42/min, and blood pressure is 76/42 mm Hg. Physical examination reveals a soft, non-distended, and non-tender abdomen with active bowel sounds. Capillary refill time is 2 seconds. Arrange the following steps in the most appropriate sequence for the evaluation and management of this patient, from the first step to the definitive final step.

  1. 1Initiate intravenous fluid resuscitation, maintain nothing-by-mouth (NPO) status, and place a nasogastric tube.
  2. 2Obtain a plain anteroposterior and cross-table lateral abdominal radiograph.
  3. 3Perform a fluoroscopic upper gastrointestinal contrast series.
  4. 4Perform surgical exploration with division of mesenteric bands and broadening of the mesenteric base.

Answer

The correct clinical sequence is to first stabilize the infant (NPO, IV fluids, nasogastric decompression), followed by a plain abdominal radiograph to rule out perforation, then an upper GI contrast series to diagnose malrotation, and finally definitive surgical intervention (Ladd procedure).
Neonatal bilious vomiting represents a surgical emergency, specifically midgut volvulus due to malrotation, until proven otherwise. The universally accepted sequence of management begins with patient stabilization (NPO, IV fluids, NG tube decompression) to prevent aspiration and address dehydration. Following stabilization, a plain abdominal radiograph is the mandatory first imaging step to rule out pneumoperitoneum (which indicates perforation and requires immediate surgery) and evaluate for classic signs of obstruction like a 'double bubble'. Assuming the plain radiograph is unremarkable and the patient remains hemodynamically stable, an upper gastrointestinal contrast series is performed to definitively diagnose malrotation by visualizing an abnormal duodenojejunal junction. Finally, once diagnosed, the patient undergoes a Ladd procedure to relieve the obstruction and prevent future volvulus.

Step-by-Step Solution

1
Stabilize the patient and decompress the gastrointestinal tract.
Placement of an NG tube, initiation of IV fluids, and strict NPO status.
Bilious emesis is a surgical emergency until proven otherwise. Initial resuscitation is critical to prevent hypovolemia, electrolyte derangements, and aspiration.
2
Perform initial rapid imaging.
A plain abdominal X-ray is reviewed.
A plain radiograph quickly rules out intestinal perforation (which would mandate immediate surgery without further imaging) and may demonstrate classic signs of atresia.
3
Obtain definitive diagnostic imaging for malrotation.
An upper GI contrast series demonstrates an abnormally placed duodenojejunal junction.
Because the infant is hemodynamically stable and lacks peritonitis or free air, contrast imaging is indicated to definitively diagnose malrotation.
4
Proceed to definitive surgical correction.
A Ladd procedure is performed.
Surgical division of the Ladd bands and broadening of the mesenteric base are required to treat malrotation and prevent life-threatening midgut volvulus.

Key Concept

The step-by-step diagnostic and management algorithm for neonatal bilious emesis in a hemodynamically stable patient.
Rate this question

Topics

Pediatric Gastrointestinal Disorders

More questions from this topic