Intussusception reduction techniques

🌬️ Telescoping Trouble

Management focuses on non-operative reduction in stable patients.

• Initial Steps: IV fluids, NG tube decompression, surgical consult.
• Non-operative Reduction:
  • Air (pneumatic) enema is the preferred method.
  • Success rate is high (80-95%).
• Surgical Intervention:
  • Indicated for failed enema or signs of ischemia/perforation.
  • Involves manual reduction ("milking") or bowel resection if non-viable.

⭐ Recurrence after successful enema reduction is ~10%. Most recurrences happen within 72 hours of the procedure.

🌭 Radiology - Signs of the Sausage

• Ultrasound (US): Gold standard diagnostic tool with >98% accuracy.
  • Transverse view: Classic "target sign" or "donut sign" showing multiple concentric rings of bowel wall.
  • Longitudinal view: "Pseudokidney sign" or "sandwich sign" representing the telescoped bowel.
• Abdominal X-ray (AXR): Often the initial test, but may be normal in ~25% of cases.
  • Suggestive findings: Sausage-shaped mass, signs of SBO, and an empty RLQ (Dance's sign).
• Contrast/Air Enema: Confirmatory finding is the "crescent sign" where contrast fills the space between the intussusceptum and intussuscipiens.

⭐ The presence of free air (pneumoperitoneum) on imaging is an absolute contraindication to non-operative reduction.

🌬️ Management - The Great Unfolding

• Initial Steps: Stabilize first! IV fluids, NG tube decompression, and analgesia.
• Non-operative Reduction (First-Line): For stable patients without peritonitis.
  • Air (Pneumatic) Enema: Preferred method. Higher success rate (~80-95%) and lower perforation risk compared to barium.
  • Hydrostatic (Saline/Contrast) Enema: Alternative method.
  • ⚠️ Contraindications: Peritonitis, perforation, shock.
  • 💡 Max 3 attempts are typically made.

⭐ Recurrence after successful non-operative reduction occurs in ~5-10% of cases, usually within 24-48 hours. Observation is key.

• Surgical Intervention: Indicated for hemodynamic instability, peritonitis, perforation, or failed enema reduction.
  • Procedure: Manual reduction ("milking" the bowel). Resection if bowel is gangrenous or a pathologic lead point is found.

⚠️ Complications - Perils of Pressure

• Bowel Perforation: Most feared complication of non-operative reduction.
  • Cause: Excessive intraluminal pressure from air/contrast. Pressure should not exceed 120 mmHg.
  • Signs: Sudden decompensation, fever, tachycardia, abdominal rigidity (peritonitis).
  • Imaging: Free intraperitoneal air on X-ray or fluoroscopy.
• Management of Perforation:
  • Immediate: Stop procedure, IV fluids, broad-spectrum antibiotics.
  • Definitive: Emergent laparotomy for repair/resection.

⭐ Perforation risk is higher with symptoms > 48 hours, dehydration, and signs of peritonitis before the procedure.

⚡ High-Yield Points - Biggest Takeaways

• Non-operative reduction is the first-line treatment for stable patients without peritonitis.
• The preferred method is an air enema under fluoroscopic or ultrasound guidance; it has a lower perforation risk than barium.
• Absolute contraindications to enema are signs of perforation, peritonitis, or shock, which mandate immediate surgical exploration.
• Non-operative reduction is successful in >80% of cases, but recurrence can occur in 5-10%.
• Surgery is indicated for failed enemas or a suspected pathological lead point.