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Meta-analysis: colonoscopic post-polypectomy bleeding in patients on continued clopidogrel therapy
1Division of Internal Medicine, Department of Medicine, University of Toronto, Toronto, ON, Canada.
Continuing clopidogrel therapy during colonoscopic polypectomy increases the risk of delayed post-polypectomy bleeding. However, interrupting this antiplatelet medication may cause serious ischemic events in high-risk patients.
Area of Science:
- Gastroenterology
- Cardiology
- Clinical Pharmacology
Background:
- Current guidelines recommend discontinuing clopidogrel 5-10 days before colonoscopic polypectomy.
- Recent studies suggest similar post-polypectomy bleeding (PPB) rates with continued clopidogrel compared to controls.
Purpose of the Study:
- To assess the risk of colonoscopic post-polypectomy bleeding (PPB) in patients maintained on clopidogrel therapy.
Main Methods:
- A meta-analysis of five observational studies involving 574 patients on clopidogrel and 6169 controls.
- Primary outcome: pooled relative risk (RR) of PPB.
- Secondary outcomes: comparison of immediate and delayed PPB.
Main Results:
- Continued clopidogrel therapy was associated with a significantly increased overall risk of PPB (RR = 2.54).
- Delayed PPB risk was significantly elevated (RR = 4.66), while immediate PPB risk was not significantly different (RR = 1.76).
Conclusions:
- Continued clopidogrel therapy increases the risk of delayed post-polypectomy bleeding but not immediate bleeding.
- For high-risk patients, clinicians must weigh the risk of bleeding against potential ischemic events from clopidogrel interruption.
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