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Diagnostic accuracy of abdominal contrast-enhanced multi-slice spiral CT after oral diluted iodide in a time segment for gastrointestinal fistula in patients with severe acute pancreatitis

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Abstract

Purpose

To evaluate the diagnostic accuracy of abdominal contrast-enhanced multi-slice spiral CT after oral diluted iodide in a time segment (post-ODI ACE-MSCT) for gastrointestinal fistula (GIF) in severe acute pancreatitis (SAP).

Materials and methods

Patients with SAP who underwent both post-ODI ACE-MSCT and endoscopy/surgery from 2017 to 2023 were continuously retrospectively involved. Their demographic information and clinical features were recorded prospectively in an in-hospital database. Using endoscopy/surgery results as the reference standard, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of post-ODI ACE-MSCT for diagnosing GIF in SAP were calculated by a four-cell table. The consistency of the two diagnostic methods was evaluated by the Kappa test and McNemar’s test.

Results

Using endoscopy/surgery as the reference standard, a total of 86 cases were divided into the GIF group (N = 52) and the non-GIF group (N = 34). Among the 52 cases of GIF, 88.5% (46/52) cases had a positive result and 11.5% (5/52) cases had a negative result of post-ODI ACE-MSCT for GIF. Among the 34 cases of non-GIF, 2.9% (1/34) case had a positive result and 97.1% (33/34) cases had a negative result of post-ODI ACE-MSCT for GIF. Post-ODI ACE-MSCT had a sensitivity of 88.5% (95% CI 75.9%–95.2%), a specificity of 97.1% (95% CI 82.9%–99.8%), a positive predictive value of 97.9% (95% CI 87.3%–99.9%), a negative predictive value of 84.6% (95% CI 68.8%–93.6%), and an accuracy of 91.9% (83.4%–96.4%). The kappa value was 0.834, and P < 0.001 by McNemar’s test. There were no significant differences in diagnostic test characteristics between the two modalities.

Conclusion

Post-ODI ACE-MSCT can diagnose GIF in SAP in a simple, noninvasive, and accurate way, and can provide earlier imaging evidence for clinical diagnosis and treatment.

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Acknowledgements

This study was supported by Scientific Research Project of Education Department of Hunan Province (No. 21C0024).

Funding

This study was supported by Scientific Research Project of Education Department of Hunan Province (No. 21C0024).

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Authors and Affiliations

Authors

Contributions

HL: conceptualization, data creation, investigation, statistical analysis and writing original draft. ZG, WX-t: writing review and editing. LG-g: supervision. LG-y: resources.

Corresponding author

Correspondence to Guo-guang Li.

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Conflict of interest

All authors have no conflicts of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved by our institutional ethical review board. Informed consent was waived for this retrospective study.

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Huang, L., Zhou, G., Wang, Xt. et al. Diagnostic accuracy of abdominal contrast-enhanced multi-slice spiral CT after oral diluted iodide in a time segment for gastrointestinal fistula in patients with severe acute pancreatitis. Jpn J Radiol (2024). https://doi.org/10.1007/s11604-024-01540-4

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  • DOI: https://doi.org/10.1007/s11604-024-01540-4

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