Midgut volvulus is a life-threatening surgical emergency caused by twisting of the small bowel around the superior mesenteric artery (SMA) axis, most commonly in the setting of underlying intestinal malrotation. The cardinal rule: bilious emesis in a neonate is malrotation with volvulus until proven otherwise. [1] Bowel necrosis can develop within hours, and there is no safe observation window — even short symptom duration can be associated with high morbidity and mortality. [2]
1. History
- Bilious (green) vomiting — the hallmark symptom, present in ~71% of cases; most common in the first days to weeks of life [2-3]
- Acute onset of abdominal pain (crampy, diffuse, or periumbilical); in neonates, irritability and inconsolability may be the only clue
- Abdominal distension, cessation of stooling/flatus [4]
- Timing: >50% present in the first month of life; ~66% of cases are neonates. Can present at any age, including adults [2][5-6]
- Feeding intolerance, poor weight gain, or intermittent abdominal pain in older children may suggest chronic/intermittent volvulus [5]
- In adults: sudden-onset abdominal pain, nausea/vomiting, obstipation [7-8]
- Important negatives: absence of prior abdominal surgery (primary volvulus), no history of bloody stools early on (late finding)
2. Alarm Features
- Bilious emesis in any neonate — treat as volvulus until excluded [1]
- Hemodynamic instability, tachycardia, poor perfusion, lethargy
- Peritoneal signs: guarding, rigidity, rebound tenderness — suggest bowel necrosis or perforation
- Bloody stools or hematochezia — late sign indicating mucosal ischemia [5]
- Rapidly progressive abdominal distension
- Sepsis features: fever, leukocytosis, lactic acidosis
- Ascites on imaging — associated with intestinal necrosis [4][7]
- Disease duration >24 hours significantly increases risk of intestinal necrosis [4]
3. Medications
- No medical therapy is definitive — this is a surgical disease
- IV fluid resuscitation with isotonic crystalloid; correct electrolyte derangements from vomiting/dehydration
- Broad-spectrum antibiotics if peritonitis, sepsis, or necrosis suspected (e.g., ampicillin/gentamicin/metronidazole in neonates; piperacillin-tazobactam in older children/adults)
- Nasogastric tube decompression
- Avoid prokinetics or laxatives — contraindicated in mechanical obstruction
- Postoperative TPN often required, especially in neonates (>50% in one cohort) [2]
4. Diet
- NPO immediately upon suspicion
- Postoperative enteral nutrition reintroduction is gradual (median ~10 days to enteral support post-laparoscopic Ladd's) [9]
- If extensive bowel resection → long-term TPN and risk of short gut syndrome [3]
- Long-term: no specific dietary restrictions once recovered, unless short bowel syndrome develops
5. Review of Systems
- GI: vomiting (bilious vs. nonbilious), abdominal pain, distension, last bowel movement, bloody stools, feeding tolerance
- Constitutional: fever, lethargy, irritability, poor feeding, weight loss
- Cardiovascular: tachycardia, poor perfusion (signs of shock)
- Genitourinary: decreased urine output (dehydration/shock)
- In neonates: birth history, gestational age, prenatal ultrasound findings, passage of meconium
- Associated anomalies: cardiac defects (heterotaxy syndrome), omphalocele, gastroschisis, diaphragmatic hernia
6. Collateral History and Family History
- Prenatal ultrasound findings (polyhydramnios, dilated bowel loops)
- Birth history: prematurity, NICU stay, prior abdominal surgeries
- Heterotaxy syndrome — associated with malrotation; cardiac anomalies may coexist [10]
- Congenital anomalies: omphalocele, gastroschisis, intestinal atresia, diaphragmatic hernia — all increase risk of malrotation [11]
- Prior episodes of intermittent vomiting or abdominal pain (chronic/intermittent volvulus)
- Family history is generally noncontributory (malrotation is sporadic)
7. Risk Factors
- Intestinal malrotation — the primary predisposing condition; narrow mesenteric base creates the anatomic substrate for volvulus [10][12]
- Neonatal age (highest incidence in first month of life) [2][5]
- Congenital anomalies: heterotaxy, omphalocele, gastroschisis, congenital diaphragmatic hernia, intestinal atresia [11]
- Prematurity [11]
- In adults: adhesive bands, prior surgery, Meckel's diverticulum, mesenteric tumors (secondary causes) [7]
- Male predominance (~77% in some series) [4]
8. Differential Diagnosis
- Duodenal atresia/stenosis — "double bubble" on radiograph; no bilious emesis if proximal to ampulla
- Jejunal/ileal atresia — distal obstruction pattern, multiple air-fluid levels
- Necrotizing enterocolitis (NEC) — premature infants, pneumatosis intestinalis on imaging
- Intussusception — intermittent colicky pain, "target sign" on US, currant jelly stools; typically 6–36 months
- Incarcerated inguinal hernia — palpable groin mass
- Hirschsprung disease — failure to pass meconium, distal obstruction
- Pyloric stenosis — nonbilious projectile vomiting, olive-shaped mass (typically 3–6 weeks old)
- Meconium ileus — distal obstruction in cystic fibrosis
- In adults: adhesive small bowel obstruction, internal hernia, sigmoid volvulus, cecal volvulus, mesenteric ischemia [13-14]
9. Past Medical History
- Prior episodes of bilious vomiting or unexplained abdominal pain (intermittent volvulus)
- Known malrotation diagnosed incidentally
- Previous Ladd's procedure — recurrent volvulus occurs in ~2–10% after laparoscopic Ladd's [15-16]
- Congenital heart disease (especially heterotaxy)
- Prior abdominal surgery (adhesive bands as secondary cause)
- History of prematurity, gastroschisis, or omphalocele
10. Physical Exam
- Vital signs: tachycardia, hypotension (late/ominous), fever (suggests necrosis/sepsis)
- Abdomen: distension, diffuse tenderness, tympany; may be deceptively benign early
- Peritoneal signs (guarding, rigidity, rebound) — indicate necrosis or perforation
- Rectal exam: empty vault; hematochezia or guaiac-positive stool (late finding)
- In neonates: irritability, lethargy, poor perfusion, mottled skin
- Assess for inguinal hernias, abdominal wall defects
- Fontanelle assessment in neonates (dehydration)
11. Lab Studies
- CBC: leukocytosis with left shift and elevated neutrophil ratio — associated with intestinal necrosis [4][7]
- BMP/CMP: electrolyte derangements (hypokalemia, metabolic alkalosis from vomiting; metabolic acidosis if ischemia)
- Lactate: elevated in bowel ischemia/necrosis
- Blood gas: metabolic acidosis suggests ischemia
- Type and screen/crossmatch: prepare for surgery
- CRP/procalcitonin: markers of inflammation/sepsis
- Coagulation studies: DIC workup if septic
- Bloody ascites on paracentesis — strongly associated with gangrenous bowel [7]
12. Imaging
- First-line (pediatric): Abdominal ultrasound with Doppler — sensitivity 94–97%, specificity 96–100% for volvulus [17-18]
- Whirlpool sign: twisting of bowel and mesentery around the SMA — accuracy 99% for volvulus [17]
- SMA cutoff sign: abrupt termination of SMA flow
- Abnormal SMA/SMV relationship (SMV to the left of or anterior to SMA)
- Dilated proximal duodenum (median 13 mm in volvulus vs. 6 mm without) [17]
- Upper GI contrast series (UGI): historically the gold standard; 93–100% sensitive [10]
- Corkscrew/coiled spring appearance of the duodenum/proximal jejunum
- Abnormal position of the duodenojejunal (DJ) flexure (ligament of Treitz)
- Reserve for nondiagnostic or equivocal US [19-20]
- Abdominal radiograph: may show "double bubble," paucity of distal gas, or diffuse distension; nonspecific but useful for initial assessment
- CT abdomen with IV contrast (adults): whirlpool sign of mesenteric vessels, swirling of mesentery around SMA, bowel wall thickening, pneumatosis, mesenteric edema, ascites [4][7][21]
- Imaging should not delay surgery if clinical suspicion is high and the patient is unstable
13. Special Tests
- Point-of-care ultrasound (POCUS): can screen for whirlpool sign and abnormal SMA/SMV relationship at the bedside in the ED [22]
- No validated clinical scoring system specific to midgut volvulus
- Intraoperative assessment of bowel viability (color, peristalsis, mesenteric pulsation; fluorescein/ICG angiography in some centers)
14. ECG
- Not directly diagnostic for midgut volvulus
- Obtain if hemodynamically unstable to assess for arrhythmias secondary to electrolyte derangements (hypokalemia, metabolic acidosis)
- Preoperative ECG as part of anesthesia workup, especially in patients with heterotaxy/congenital heart disease
15. Assessment
Midgut volvulus is a time-critical surgical emergency. The classic presentation is a neonate in the first weeks of life with acute bilious vomiting, abdominal distension, and progressive clinical deterioration. However, presentation can be subtle early — the abdomen may appear benign before ischemia develops. In older children and adults, symptoms may mimic other causes of small bowel obstruction, making diagnosis more challenging. [5][7]
Severity stratification
- Viable bowel: early presentation, no peritoneal signs, no metabolic acidosis → emergent Ladd's procedure with excellent prognosis (>90% cure rate) [4]
- Necrotic bowel: delayed presentation (>24 hours), peritonitis, shock, elevated WBC/neutrophils, ascites → bowel resection required; mortality 3–10% [2][4][7]
- Catastrophic: massive midgut necrosis → short gut syndrome, TPN dependence, potential need for intestinal transplant [11]
Neonatal bowel is more susceptible to ischemia — even 180° torsion can cause ischemic changes in neonates. [5]
16. Treatment Plan
Initial stabilization
- ABCs, IV access, aggressive fluid resuscitation
- NPO, nasogastric tube decompression
- Correct electrolyte abnormalities
- Broad-spectrum antibiotics if peritonitis/sepsis suspected
- Urgent pediatric surgery consultation — do not delay for imaging if clinically unstable [1]
Definitive surgical management — Ladd's procedure: [10][23]
- Counterclockwise detorsion of the volvulus
- Division of Ladd's bands (peritoneal bands crossing the duodenum)
- Broadening of the mesenteric base
- Straightening of the duodenum along the right abdominal gutter (Kocherization)
- Appendectomy (cecum placed in left lower quadrant — atypical position makes future appendicitis diagnosis difficult)
- Placement of the small bowel on the right and colon on the left
Approach
- Open Ladd's: traditional approach, especially in unstable patients or those with suspected necrosis [24]
- Laparoscopic Ladd's: feasible in hemodynamically stable patients without necrosis; shorter hospital stay but potentially higher recurrent volvulus rate (~1–10%). Conversion to open in ~11–44% when volvulus is present [15-16][24-25]
If bowel necrosis is present
- Resection of nonviable bowel; damage control principles apply
- Second-look laparotomy at 24–48 hours to reassess borderline bowel viability
- Preserve maximum bowel length to prevent short gut syndrome [1]
17. Disposition
- All confirmed or suspected midgut volvulus → emergent surgical admission [2]
- ICU admission if hemodynamically unstable, septic, or post-extensive resection
- Transfer to a pediatric surgical center if not available on-site — do not delay transfer for imaging
- No role for observation or "watch and wait" — even short symptom duration can result in catastrophic outcomes [2]
- Specialist consultation triggers: pediatric surgery (always), neonatology (neonates), pediatric radiology, NICU/PICU
18. Follow Up / Return Precautions
- Postoperative follow-up with pediatric surgery within 1–2 weeks
- Monitor for recurrent volvulus (recurrence rate ~2–10% after Ladd's, higher with laparoscopic approach) [11][15]
- Monitor for adhesive small bowel obstruction (SBO) — occurs in ~6–10% after open Ladd's; lower after laparoscopic (~1%) [25-26]
- Return precautions: bilious vomiting, abdominal distension, feeding intolerance, bloody stools, fever, lethargy → immediate ED evaluation
- Long-term: monitor growth and nutritional status, especially if bowel resection was performed
- If short gut syndrome develops → multidisciplinary management (pediatric GI, nutrition, transplant surgery) [11]
- Expected recovery: uncomplicated Ladd's → enteral feeds within ~10 days, discharge within 1–2 weeks; overall cure rate >90% with early intervention [4]
References
1. Malrotation: Management of Disorders of Gut Rotation for the General Surgeon. — Do WS, Lillehei CW. The Surgical Clinics of North America. 2022.
2. No Safe Time Window in Malrotation and Volvulus: A Consecutive Cohort Study. — Gibson A, Silva H, Bajaj M, et al. Journal of Paediatrics and Child Health. 2024.
3. Ultrasound for Infantile Midgut Malrotation: Techniques, Pearls, and Pitfalls. — McCurdie FK, Meshaka R, Leung G, Billington J, Watson TA. Pediatric Radiology. 2024.
4. Analysis of Clinical Diagnosis and Treatment of Intestinal Volvulus. — Fo Y, Kang X, Tang Y, Zhao L. BMC Gastroenterology. 2023.
5. Notable Clinical Differences Between Neonatal and Post-Neonatal Intestinal Malrotation: A Multicenter Review in Southern Japan. — Kedoin C, Muto M, Nagano A, et al. Journal of Pediatric Surgery. 2024.
6. Intestinal Malrotation in the Adult Population: Diagnosis, Management, and Outcomes After Laparoscopic Ladd Procedure. — Gomaa IA, Mirande MD, Armenia SJ, et al. Journal of Gastrointestinal Surgery : Official Journal of the Society for Surgery of the Alimentary Tract. 2024.
7. Diagnosis, Treatment and Prognosis of Small Bowel Volvulus in Adults: A Monocentric Summary of a Rare Small Intestinal Obstruction. — Li X, Zhang J, Li B, et al. PloS One. 2017.
8. Successful Preoperative Diagnosis and Laparoscopic Management of Primary Small Bowel Volvulus: A Case Report and Literature Review. — Shimizu S, Hara H, Muto Y, Kido T, Miyata R. Medicine. 2024.
9. Abnormal Anatomical Landmarks: The Guide Points of Laparoscopic Ladd's Surgery for Neonatal Congenital Intestinal Malrotation. — Zeng X, Lian N, Wang X, Du D. Surgical Endoscopy. 2025.
10. Diagnosis and Management of Intestinal Rotational Abnormalities With or Without Volvulus in the Pediatric Population. — Svetanoff WJ, Srivatsa S, Diefenbach K, Nwomeh BC. Seminars in Pediatric Surgery. 2022.
11. Five Hundred Patients With Gut Malrotation: Thirty Years of Experience With the Introduction of a New Surgical Procedure. — Abu-Elmagd K, Mazariegos G, Armanyous S, et al. Annals of Surgery. 2021.
12. Update on the Mesentery: Structure, Function, and Role in Disease. — Coffey JC, Byrnes KG, Walsh DJ, Cunningham RM. The Lancet. Gastroenterology & Hepatology. 2022.
13. Imaging Features of Neonatal Bowel Obstruction. — Gerrie SK, Navarro OM. Radiographics : A Review Publication of the Radiological Society of North America, Inc. 2023.
14. Acute Abdominal Pain in Children: Evaluation and Management. — Buel KL, Wilcox J, Mingo PT. American Family Physician. 2024.
15. Risk Factors for Postoperative Volvulus and Its Laparoscopic Management Following Laparoscopic Ladd's Procedure in Pediatric Patients With Intestinal Malrotation: A Single-Center, Retrospective Cohort Study. — Duy HP, Manh HV, Tran NX, Yoshimura S, Okata Y. Journal of Pediatric Surgery. 2025.
16. Laparoscopic Ladd Procedure for Malrotation in Newborns and Infants. — da Costa KM, Saxena AK. The American Surgeon. 2021.
17. Diagnostic Performance of Ultrasound for Diagnosing Midgut Malrotation and Volvulus in Children: A Multiinstitutional Retrospective Review. — Nguyen HN, El-Ali AM, Van Tassel D, et al. AJR. American Journal of Roentgenology. 2025.
18. Ultrasound for the Diagnosis of Malrotation and Volvulus in Children and Adolescents: A Systematic Review and Meta-Analysis. — Nguyen HN, Kulkarni M, Jose J, et al. Archives of Disease in Childhood. 2021.
19. Making the Diagnosis of Midgut Volvulus: Limited Abdominal Ultrasound Has Changed Our Clinical Practice. — Wong K, Van Tassel D, Lee J, et al. Journal of Pediatric Surgery. 2020.
20. Factors Associated With Diagnostic Ultrasound for Midgut Volvulus and Relevance of the Non-Diagnostic Examination. — El-Ali AM, Ocal S, Hartwell CA, et al. Pediatric Radiology. 2023.
21. ACR Appropriateness Criteria® Suspected Small-Bowel Obstruction. — Expert Panel on Gastrointestinal Imaging, Chang KJ, Marin D, et al. Journal of the American College of Radiology : JACR. 2020.
22. A Multi-Institutional Case Series With Review of Point-of-Care Ultrasound to Diagnose Malrotation and Midgut Volvulus in the Pediatric Emergency Department. — Garcia AM, Asad I, Tessaro MO, et al. Pediatric Emergency Care. 2019.
23. Malrotation of the Intestine. — Torres AM, Ziegler MM. World Journal of Surgery. 1993.
24. Laparoscopic Ladd Procedure for the Management of Malrotation and Volvulus. — Svetanoff WJ, Sobrino JA, Sujka JA, St Peter SD, Fraser JD. Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A. 2020.
25. Laparoscopic Versus Open Ladd Procedure for Midgut Malrotation. — Johnston WR, Hwang R, Mattei P. Journal of Pediatric Surgery. 2024.
26. Effect of Adhesion Barrier Use During Ladd Procedure for Intestinal Malrotation on Postoperative Midgut Volvulus and Postoperative Small-Bowel Obstruction: A Retrospective Cohort Study Using a National Inpatient Database. — Takamoto N, Aso S, Konishi T, et al. Journal of the American College of Surgeons. 2026.