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Predictors of Recurrent Biliary Obstruction Following Percutaneous Uncovered Metal Stent Insertion in Patients with Distal Malignant Biliary Obstruction: An Analysis Using a Competing Risk Model

  • Clinical Investigation
  • Biliary
  • Published:
CardioVascular and Interventional Radiology Aims and scope Submit manuscript

Abstract

Objective

To evaluate predictive factors of recurrent biliary obstruction (RBO) following percutaneous uncovered metal stent placement for unresectable distal malignant biliary obstruction (MBO) by using a competing risk model.

Materials and Methods

Between March 2012 and March 2016, 119 patients underwent percutaneous uncovered metal stent placement with distal MBO at our institution. Univariate and multivariate analyses were conducted to identify the prognostic factors for RBO using a competing risk model.

Results

The median overall survival period was 170 days (range 19–775 days). Recurrent biliary obstruction before death was observed in 34 patients (28.6%). The 3-, 6-, and 12-month cumulative incidences of RBO were 14.3%, 21.0%, and 27.7%, respectively. A multivariate analysis indicated that ampullary carcinoma compared with metastatic carcinoma (hazard ratio [HR] = 4.86; 95% confidence interval [CI], 1.74–13.54; P = 0.003) and a stent insertion above the sphincter of Oddi (HR 2.49; 95% CI, 1.11–5.62; P = 0.028) were the independent risk factors for RBO when we considered death to be a competing risk.

Conclusion

Ampullary carcinoma and stent insertion above the sphincter of Oddi were risk factors for RBO in these patients who received percutaneous transhepatic stent placement.

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Acknowledgements

We would like to thank Jin LIU, MD, from the First Affiliated Hospital with Nanjing Medical University for his statistical work.

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Authors and Affiliations

  1. Department of Interventional Radiology, The First Affiliated Hospital with Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, China

    Jin-Xing Zhang, Bin Wang, Sheng Liu, Qing-Quan Zu & Hai-Bin Shi

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  1. Jin-Xing Zhang
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  2. Bin Wang
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  3. Sheng Liu
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Correspondence to Qing-Quan Zu or Hai-Bin Shi.

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No conflict of interest to declare.

Ethical Approval

Study protocol followed the guidelines of the World Medical Association Declaration of Helsinki and was approved by the Ethics Committee of our institution (Ethical review no. 2017-SR-307). For this retrospective study, formal consent was not required.

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Zhang, JX., Wang, B., Liu, S. et al. Predictors of Recurrent Biliary Obstruction Following Percutaneous Uncovered Metal Stent Insertion in Patients with Distal Malignant Biliary Obstruction: An Analysis Using a Competing Risk Model. Cardiovasc Intervent Radiol 42, 276–282 (2019). https://doi.org/10.1007/s00270-018-2107-9

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  • DOI: https://doi.org/10.1007/s00270-018-2107-9

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