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Antithrombotic Treatment Is Associated with Small-Bowel Video Capsule Endoscopy Positive Findings in Obscure Gastrointestinal Bleeding: A Systematic Review and Meta-Analysis

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Abstract

Introduction

The impact of antithrombotic treatment on the findings of small-bowel capsule endoscopy for patients with obscure gastrointestinal bleeding remains contentious. We aimed to determine the effect of these agents on small-bowel video capsule endoscopy positive findings.

Methods

MEDLINE, Cochrane Library, and Google Scholar were searched for studies reporting on patients receiving concurrent antithrombotic treatment, while undergoing capsule endoscopy for obscure gastrointestinal bleeding (OGIB). Outcomes were the effect of antithrombotic therapy—overall and per type of antithrombotic agent—on the examination’s positive findings and re-bleeding risk. The effect size of study outcomes is presented as odds ratio (OR) with 95% confidence interval (CI).

Results

Fourteen studies with 1023 patients were included. We detected significant heterogeneity with no evidence of publication bias. Compared to antithrombotic drug nonusers, antithrombotic treatment was associated with an increased prevalence of positive findings [OR 1.98 (95% CI 1.34–2.93); P = 0.0006]. This effect did not differ between antiplatelet and anticoagulant treatments [OR 2.22 (95% CI 1.28–3.84); P = 0.005 and 2.53 (95% CI 1.66–3.87); P < 0.0001, respectively]. Antithrombotic use over no use was not associated either with overt [OR 1.17 (95% CI 0.51–2.66); P = 0.71] or with occult [OR 0.86 (95% CI 0.38–1.95); P = 0.71] bleeding pattern. However, concurrent antithrombotic treatment was associated with higher odds for re-bleeding compared to no treatment [OR 2.53 (95% CI 1.46–4.37); P = 0.0009].

Conclusions

Antithrombotic treatment is associated with more positive findings in small-bowel video capsule endoscopy in OGIB as well as higher odds of re-bleeding.

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Acknowledgments

We acknowledge the contribution of Prof. Dr. Filiz Akyuz who kindly provided raw data of his study.

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Authors and Affiliations

  1. Hepatogastroenterology Unit, Second Department of Internal Medicine – Propaedeutic Research Institute and Diabetes Center, Medical School, National and Kapodistrian University of Athens, “Attikon” University General Hospital 1, Rimini Street, 124 62, Athens, Greece

    Georgios Tziatzios, Paraskevas Gkolfakis, Ioannis S. Papanikolaou & Konstantinos Triantafyllou

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  1. Georgios Tziatzios
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  2. Paraskevas Gkolfakis
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  3. Ioannis S. Papanikolaou
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  4. Konstantinos Triantafyllou
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Contributions

G Tziatzios and P Gkolfakis acquired the data, performed the meta-analysis, drafted, and finally approved the manuscript; Ioannis S. Papanikolaou revised the draft critically for important intellectual content and finally approved the manuscript; K Triantafyllou conceived the idea, revised the draft critically for important intellectual content, and finally approved the manuscript.

Corresponding author

Correspondence to Konstantinos Triantafyllou.

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Tziatzios, G., Gkolfakis, P., Papanikolaou, I.S. et al. Antithrombotic Treatment Is Associated with Small-Bowel Video Capsule Endoscopy Positive Findings in Obscure Gastrointestinal Bleeding: A Systematic Review and Meta-Analysis. Dig Dis Sci 64, 15–24 (2019). https://doi.org/10.1007/s10620-018-5292-0

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