Abstract
Background
Few reports explore the frequency and factors associated with diagnostic ultrasound (US) for midgut volvulus.
Objective
To evaluate predictive factors for diagnostic US for midgut volvulus and clinical outcomes of patients with non-diagnostic US.
Materials and methods
This retrospective study included infants imaged for midgut volvulus with US. Exams were rated as diagnostic (midgut volvulus present or absent) or non-diagnostic by a pediatric radiologist, and in cases of disagreement with the original report, an additional pediatric radiologist was the tie-breaker. For each exam, the following were recorded: age, weight, respiratory support, exam indication, sonographer experience, and gaseous dilated bowel loops on radiography. Logistic regression models with “stepwise” variable selection were used to investigate the association of diagnostic US for midgut volvulus with each of the independent variables.
Results
One hundred nineteen patients were imaged. US was diagnostic in 74% (88/119) of patients. In subsets of patients presenting with bilious emesis or age <28 days, US was diagnostic in 92% (22/24) and 90% (53/59), respectively. Logistic regression suggested that symptom type (bilious vs other) was the best predictor of diagnostic US (type 3 P=0.02). Out of 26 patients with available radiographs, US was diagnostic in 92% (12/13) of patients without bowel dilation on radiographs compared to 62% (8/13) of patients with bowel dilation (P=0.16). Weight, respiratory support, and sonographer experience did not differ between groups. Two sick neonates, ages 2 days and 30 days, in whom the primary clinical concern was dropping hematocrit and sepsis, respectively, had non-diagnostic ultrasounds in the setting of bowel dilation on radiography. Both were found to have midgut volvulus at surgery and both expired.
Conclusion
US was most frequently diagnostic in patients with bilious emesis or age less than 28 days. Non-diagnostic US for midgut volvulus must prompt a predetermined follow-up strategy, such as an additional imaging study (e.g., upper GI series), particularly in a sick child, as non-diagnostic US may miss midgut volvulus.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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The authors declare that they had full access to all of the data in this study and the authors take complete responsibility for the integrity of the data and the accuracy of the data analysis. All authors reviewed and approved the final manuscript. Author contributions are summarized:
A.M.E.: study design, data collection, data analysis, manuscript preparation, image interpretation
R.K.: study design
L.M.: study design
N.S.: study design, data collection, data analysis, manuscript preparation, image interpretation
S.L.: study design, data collection, data analysis, manuscript preparation
J.P.: study design, data collection
X.L.: data analysis, manuscript preparation
J.D.G.: data analysis, manuscript preparation
C.A.H.: Data collection
S.O.: Data collection
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El-Ali, A.M., Ocal, S., Hartwell, C.A. et al. Factors associated with diagnostic ultrasound for midgut volvulus and relevance of the non-diagnostic examination. Pediatr Radiol 53, 2199–2207 (2023). https://doi.org/10.1007/s00247-023-05727-1
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DOI: https://doi.org/10.1007/s00247-023-05727-1