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Updated: Jul 31, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
Published on: October 16, 2013
Colonoscopy in the patient requiring anticoagulation
S K Timothy1, T C Hicks, F G Opelka
1Department of Colon and Rectal Surgery, Ochsner Clinic Foundation, 1514 Jefferson Highway, New Orleans, Louisiana 70121, USA.
Patients on warfarin can safely undergo colonoscopy. While procedures like hot biopsy slightly increase bleeding risk, overall complications remain low, suggesting current management is effective.
Area of Science:
- Gastroenterology
- Cardiology
- Internal Medicine
Background:
- Warfarin (a common anticoagulant) management requires careful consideration during procedures like colonoscopy.
- Assessing perioperative risks is crucial for patient safety.
Purpose of the Study:
- To evaluate the safety and complication rates of perioperative warfarin management in patients undergoing colonoscopy.
- To analyze bleeding risks associated with specific colonoscopic interventions.
Main Methods:
- Retrospective review of 109 colonoscopies in 94 patients on warfarin.
- Warfarin was stopped 3 days prior and restarted the day after the procedure.
- Coagulation parameters (prothrombin time, international normalized ratio) were measured before colonoscopy.
Main Results:
- A low hemorrhagic complication rate of 0.92% was observed.
- 47% of patients underwent hot biopsy or snare polypectomy.
- Therapeutic procedures showed a slightly elevated complication rate of 1.96%.
Conclusions:
- Colonoscopy appears safe for patients on warfarin.
- Hot biopsy and snare polypectomy procedures are associated with a minor increase in bleeding risk.
- Further research is recommended to refine anticoagulation guidelines for colonoscopy.
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