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Difficulty: HardPediatric Gastrointestinal Disorders

A 9-month-old boy is brought to the emergency department by his parents due to sudden-onset, intermittent episodes of severe crying. During these episodes, he draws his knees up to his chest and appears inconsolable. Between episodes, the parents note that he appears uncharacteristically lethargic. He has vomited twice since the morning, and a recent diaper change revealed dark red, mucus-like stool. On physical examination, temperature is 37.2°C (99.0°F), heart rate is 170/min, and blood pressure is 85/50 mm Hg. Capillary refill time is 4 seconds. Abdominal examination reveals a palpable, sausage-shaped mass in the right upper quadrant, with no rebound tenderness, guarding, or rigidity.

Arrange the following management steps in the most appropriate chronological order for this patient.

  1. 1Establish intravenous access and administer an isotonic fluid bolus.
  2. 2Perform an abdominal ultrasound to confirm the diagnosis.
  3. 3Notify the pediatric surgery team to be on standby.
  4. 4Attempt a fluoroscopy-guided pneumatic enema.
  5. 5Proceed to surgical laparotomy if non-operative reduction fails.

Answer

The correct chronological sequence is: 1) Establish intravenous access and administer an isotonic fluid bolus, 2) Perform an abdominal ultrasound to confirm the diagnosis, 3) Notify the pediatric surgery team to be on standby, 4) Attempt a fluoroscopy-guided pneumatic enema, 5) Proceed to surgical laparotomy if non-operative reduction fails.
This infant presents with classic signs of intussusception (colicky abdominal pain, lethargy, currant jelly stools, and a sausage-shaped mass) alongside objective signs of hypovolemic shock. According to pediatric advanced life support guidelines, establishing IV access and administering an isotonic fluid bolus is the paramount first step. Once the patient is hemodynamically stable, an abdominal ultrasound should be performed to confirm the diagnosis (typically showing a 'target' sign). Because the subsequent treatment—a pneumatic enema—carries a risk of bowel perforation, the pediatric surgery team must be notified to be on standby. After surgical notification, the pneumatic enema is performed to therapeutically reduce the intussusception. Finally, if this non-operative approach fails, or if a perforation occurs during the procedure, the necessary next step is to proceed to surgical laparotomy.

Step-by-Step Solution

1
Assess hemodynamic status and prioritize resuscitation.
Patient is stabilized with intravenous isotonic fluids.
The patient exhibits signs of shock (lethargy, tachycardia, delayed capillary refill), which must be addressed prior to diagnostic workup to prevent cardiovascular collapse.
2
Obtain diagnostic imaging.
Abdominal ultrasound confirms the presence of a 'target sign'.
Ultrasound is the most sensitive and specific non-invasive modality to confirm intussusception without exposing the infant to ionizing radiation.
3
Coordinate multidisciplinary care.
Pediatric surgery is notified of the confirmed diagnosis.
Surgeons must be on standby during therapeutic enemas due to the risk of iatrogenic perforation or failure of reduction.
4
Attempt non-operative therapeutic reduction.
A fluoroscopy-guided pneumatic enema is performed.
Because the patient's abdomen lacks signs of peritonitis, air or contrast enema is the standard primary therapeutic approach.
5
Prepare for definitive surgical management.
Surgical laparotomy is planned as a backup procedure.
Operative manual reduction is strictly required if the non-operative enema is unsuccessful or complicated by bowel perforation.

Key Concept

The sequential management of intussusception involves initial hemodynamic stabilization, ultrasound confirmation, surgical notification, followed by non-operative enema reduction, with surgery reserved for failed reduction or acute complications.
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Topics

Pediatric Gastrointestinal Disorders

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