Guideline 11.6 — Abdominal Wall Defects (Gastroschisis & Omphalocele)

BEDSIDE ACTION BOX — At Delivery

Protect the bowel/sac immediately: handle gently, do not let it dry or lose heat — cover exposed bowel with warm saline-soaked gauze and wrap in cling film / a bowel bag; keep sterile.
Position the baby to preserve mesenteric perfusion: support the bowel on the abdomen (often right lateral position) so the mesentery is not kinked/stretched; check the bowel remains pink.
Conserve heat and fluid — large evaporative losses from exposed bowel: use a bowel bag, warm environment, and generous IV fluids (higher maintenance than usual — verify locally).
Keep NPO with a nasogastric tube on free drainage/suction; give IV fluids/glucose; start antibiotics per policy; provide analgesia.
Distinguish gastroschisis (exposed bowel, no covering, usually right of the cord, few associated anomalies) from omphalocele/exomphalos (membrane-covered, central, cord inserts on the sac, high rate of associated anomalies — screen cardiac/genetic).

1. Overview

Overview

Abdominal wall defects allow abdominal contents to protrude through the anterior abdominal wall. The two main types are gastroschisis (herniation of uncovered bowel through a defect beside the umbilical cord) and omphalocele/exomphalos (herniation of abdominal contents into the base of the cord, covered by a membrane). They differ crucially in the presence of a covering, the risk to the bowel, and the frequency of associated anomalies — which shapes both immediate care and prognosis. The neonatal priorities are bowel protection, heat and fluid conservation, preserving mesenteric perfusion, and surgical referral.

Why This Topic Matters

In gastroschisis, exposed bowel loses heat and fluid rapidly and can be compromised if the mesentery kinks — immediate protective measures matter. In omphalocele, the high rate of associated cardiac, chromosomal, and syndromic anomalies drives outcome and needs systematic screening.

2. Who This Guideline Applies To

Scope

Neonates with gastroschisis or omphalocele (antenatally diagnosed or found at birth).
Delivery-room and stabilization teams and those coordinating surgical transfer.
Cross-references: delivery-room stabilization of unique populations (1.2), GI obstruction (11.5), intestinal failure (11.2), parenteral nutrition (7.2), and genetics (12.2/12.3).

3. Key Definitions

Term	Definition
Gastroschisis	Uncovered bowel herniating through a defect (usually to the right of the cord); few associated anomalies.
Omphalocele / exomphalos	Membrane-covered herniation into the cord base; high rate of associated anomalies.
Bowel bag	Sterile bag/wrap used to enclose exposed bowel to conserve heat/fluid and protect it.
Silo / staged closure	Gradual reduction of viscera before delayed closure when primary closure isn't feasible.

4. Gastroschisis vs Omphalocele

Feature	Gastroschisis	Omphalocele/Exomphalos
Covering membrane	None (exposed bowel)	Membrane-covered (unless ruptured)
Location vs cord	Beside the cord (usually right)	Central; cord inserts onto the sac
Contents	Usually bowel	Bowel ± liver
Associated anomalies	Few (bowel atresia possible)	High (cardiac, chromosomal — e.g., trisomies, Beckwith-Wiedemann)
Main early risk	Heat/fluid loss; bowel ischemia if mesentery kinks	Associated anomalies; sac rupture; large defects

5. Delivery-Room Management

Protect, Conserve, Perfuse

Handle gently and aseptically; cover exposed bowel with warm saline-soaked gauze and enclose in cling film / a bowel bag; do not force reduction.
Position to keep the mesentery unkinked (support the bowel; often nurse in a lateral position) — check bowel color/perfusion frequently.
Conserve heat (warm environment, bowel bag) and give generous IV fluids (large evaporative losses); NPO with NG decompression.
For omphalocele, keep the sac intact and covered; if ruptured, manage like gastroschisis.

6. Management Algorithm

At birth: protect the bowel/sac

Warm saline gauze + bowel bag; aseptic; do not let it dry; keep the omphalocele sac intact.

Preserve perfusion & conserve heat/fluid

Position to avoid mesenteric kinking; warm environment; generous IV fluids; NPO + NG decompression.

Resuscitate & support

Airway/breathing; glucose; antibiotics per policy; analgesia; monitor bowel color; correct fluid/electrolyte losses.

Screen (especially omphalocele)

Echocardiography and genetic evaluation for omphalocele (high anomaly rate); assess for bowel atresia in gastroschisis.

Surgical plan

Primary closure vs staged silo reduction (gastroschisis); individualized timing/approach for omphalocele (may be delayed for large defects).

⚠ Do-not-miss

Bowel ischemia from mesenteric kinking/tight defect; hypothermia/hypovolemia from exposed bowel; associated cardiac/chromosomal anomalies (omphalocele); and bowel atresia (gastroschisis).

7. Ongoing Stabilization

Before & After Surgery

Continue heat and fluid conservation and NG decompression; monitor perfusion and bowel color.
Start parenteral nutrition early (prolonged ileus is common, especially in gastroschisis — see 7.2/11.2); advance enteral feeds slowly as motility returns.
Analgesia; infection surveillance; support the family; coordinate surgical timing and any staged reduction.

8. Surgical Options (Surgeon-Led)

Closure Strategies

Gastroschisis: primary closure if feasible, or a preformed/surgical silo with gradual reduction then delayed closure; watch for abdominal compartment syndrome.
Omphalocele: approach individualized by size and associated anomalies — primary or staged closure, or conservative "paint and wait" for giant defects, with later repair.
Anticipate prolonged ileus and PN dependence, especially in gastroschisis.

9. Monitoring

Parameter	When	Action
Bowel color/perfusion	Continuous (pre-op)	Reposition/urgent surgery if ischemic.
Temperature	Continuous	Prevent hypothermia (bowel bag/warmth).
Fluids/electrolytes	Serial	Replace large losses; guide resuscitation.
Abdominal pressure (post-closure)	Post-op	Watch for compartment syndrome.
Feeding tolerance/growth	Ongoing	Advance feeds as ileus resolves; PN.

10. Precautions

Safety Cautions

Never let exposed bowel dry or cool — use warm saline gauze + bowel bag; conserve fluid/heat aggressively.
Position to preserve mesenteric perfusion (avoid kinking); check bowel color frequently.
Keep the omphalocele sac intact; if ruptured, manage as gastroschisis.
Screen omphalocele for associated anomalies (cardiac/chromosomal) — they drive prognosis.
Anticipate abdominal compartment syndrome after closure and prolonged ileus/PN need.

11. Escalation & Family Support

Family-Centered Communication

"Your baby was born with the bowel outside the tummy. We protect it, keep your baby warm, and give fluids, then the surgeons return it — sometimes gradually over days."
"When the bowel is covered by a sac, we also check the heart and other organs, as this type is more often linked to other conditions. Feeding can take time to establish."

12. Key Pearls

High-Value Clinical Pearls

Gastroschisis = exposed bowel, beside the cord, few anomalies; omphalocele = membrane-covered, central, high anomaly rate.
Immediate priorities: protect the bowel, conserve heat/fluid (bowel bag), and preserve mesenteric perfusion (positioning).
Screen omphalocele for cardiac/chromosomal anomalies (e.g., trisomies, Beckwith-Wiedemann).
NPO + NG decompression + generous IV fluids + early PN (gastroschisis ileus).
Closure may be primary or staged (silo); watch for abdominal compartment syndrome.
If an omphalocele sac ruptures, manage like gastroschisis.

13. Common Mistakes to Avoid

Mistake	Why it harms	Better practice
Letting bowel dry/cool.	Hypothermia/fluid loss/injury.	Warm saline gauze + bowel bag.
Poor positioning.	Mesenteric kinking/ischemia.	Support bowel; preserve perfusion.
Under-resuscitation.	Hypovolemia.	Generous IV fluids; replace losses.
Not screening omphalocele.	Missed cardiac/chromosomal disease.	Echo + genetics.
Ignoring compartment syndrome.	Bowel/organ compromise.	Staged closure; monitor pressure.

14. Board-Style High-Yield Summary

Key Takeaways

Gastroschisis: uncovered bowel beside the cord, few associated anomalies, main risk is heat/fluid loss and mesenteric ischemia.
Omphalocele: membrane-covered central defect, cord inserts on the sac, high rate of cardiac/chromosomal anomalies.
Immediate care: protect the bowel/sac (warm saline gauze + bowel bag), conserve heat/fluid, position to preserve perfusion, NPO + NG decompression, generous IV fluids.
Screen omphalocele for associated anomalies (echo/genetics).
Surgery: primary or staged (silo) closure; anticipate compartment syndrome and prolonged ileus/PN need.
A ruptured omphalocele is managed like gastroschisis.

15. References

1.West Midlands Neonatal ODN. Abdominal Wall Defects; Gastroschisis; Exomphalos. Neonatal Guidelines 2025–28.
2.Baylor College of Medicine. Guidelines for Acute Care of the Neonate, Ed. 33, 2025–2026 (abdominal wall defects).
3.BAPS / pediatric surgery references — gastroschisis and exomphalos management (current).
4.Ministry of Health Belize. Neonatal Clinical Practice Guidelines 2018–2021.
5.Ledbetter DJ. Gastroschisis and omphalocele (reviews). Surg Clin North Am.

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Chapter 11.6 — Abdominal Wall Defects (Gastroschisis & Omphalocele)