Gastroesophageal Reflux in Pediatrics

Definition

Epidemiology & Natural History

• GER is extremely common in infants, often beginning in the first week of life
• The typical uncomplicated infant effortlessly regurgitates small amounts of milk after feeding while continuing to grow normally
• Symptoms usually resolve by the end of the first year of life, coinciding with solid food introduction and the assumption of an upright sitting position
• GERD is particularly problematic in neurologically impaired children, who are at higher risk for severe disease and complications — Tintinalli's Emergency Medicine, p. 170

Pathophysiology

• Immature LES tone in infants
• Short intra-abdominal esophageal length
• Liquid diet and predominantly supine positioning
• Delayed gastric emptying (relevant in some neurologically impaired children)

Clinical Manifestations

Important: A diagnosis of GERD requires repeated episodes of vomiting interfering with growth and development, or the presence of apparent life-threatening events. Not every infant who spits up has GERD.

Diagnostic Workup

1. Barium swallow — first-line imaging; rules out anatomic obstruction (pyloric stenosis, duodenal webs, malrotation)
2. 24-hour pH probe study — gold standard for confirming pathologic reflux; quantifies frequency and severity (though poorly tolerated)
3. Esophageal endoscopy with biopsy — identifies esophagitis, measures intra-abdominal esophageal length, detects Barrett's esophagus
4. Radioisotope "milk scan" — evaluates gastric emptying; limited evidence for changing management once GERD is confirmed
5. Multichannel intraluminal impedance (MII) — detects both acid and non-acid reflux events — Schwartz's, p. 1749

Treatment

Conservative (First-line in Infants)

• Positioning: Prone, head-up position is preferred by some; upright positioning post-feeding
• Formula thickening: Rice cereal added to formula to reduce regurgitation

Medical Therapy

• H₂-receptor antagonists and/or proton pump inhibitors (PPIs) for gastric acid reduction
• Medical therapy is successful in most neurologically normal infants and younger children, many of whom outgrow their need for medications
• ⚠️ A 2025 Cochrane review (PMID 40066936) found limited evidence supporting PPI use in preterm infants, raising safety concerns

Surgical Therapy

1. Nasojejunal/gastrojejunal feeding tube — least invasive surgical option; bypasses the stomach so food doesn't enter the esophagus; limited as a long-term solution (tubes dislodge, acid reflux still occurs)
2. Fundoplication — definitive treatment; the fundus is wrapped around the distal esophagus either:
   • 360° (Nissen) — full wrap
   • Partial (Thal or Toupet) — used when esophageal motility is a concern
   • Performed laparoscopically whenever possible (current standard in children)
   • A gastrostomy tube is placed concurrently in infants <1 year or children with feeding difficulties

• Early: pneumonia, atelectasis
• Late: wrap breakdown with recurrent reflux (may require redo fundoplication), dysphagia from overly tight wrap (responds to dilation)
• All complications more common in neurologically impaired children

Key Takeaways

• GER is physiologic in infants and usually resolves by age 1
• GERD requires evidence of complications or growth impairment to diagnose
• Neurologically impaired children are the highest-risk group
• Management is stepwise: conservative → medical → surgical
• Long-term PPI use has emerging safety concerns, particularly in preterm infants, potentially increasing surgical intervention rates