Midgut Volvulus

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]

• 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)

• 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]

• 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]

• 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

• 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

• 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)

• 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]

• 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]

• 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

• 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)

• 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]

• 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

• 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)

• 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

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]

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]

• 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

• 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]

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.