Bleeding risk after invasive procedures in aspirin/NSAID users: polypectomy study in veterans

Area of Science:

• Gastroenterology
• Clinical Pharmacology
• Internal Medicine

Background:

• Limited high-quality data exists on aspirin (ASA) and nonsteroidal anti-inflammatory drug (NSAID) use before endoscopic procedures.
• Most endoscopists discontinue ASA/NSAIDs before polypectomy due to bleeding risk concerns.
• Current guidelines acknowledge a lack of definitive recommendations for ASA/NSAID use during endoscopy.

Purpose of the Study:

• To assess the risk of postpolypectomy bleeding in patients using ASA/NSAIDs.
• To identify risk factors associated with postpolypectomy bleeding in a large veteran cohort.
• To evaluate the necessity of withholding ASA/NSAIDs before colonoscopic polypectomy.

Main Methods:

• Retrospective cohort study at a Veterans Affairs Medical Center.
• Included 1174 patients undergoing colonoscopic polypectomy between 2002 and 2007.
• Compared postpolypectomy bleeding rates between ASA/NSAID users and non-users, excluding those on other antiplatelet agents or anticoagulants.

Main Results:

• 43% of patients were on ASA or NSAIDs; no significant difference in postpolypectomy bleeding rates was observed (3.2% vs 3.0%).
• ASA/NSAID use was not a significant risk factor for postpolypectomy bleeding in multivariate analysis.
• The number of polyps removed per patient was the only significant risk factor for bleeding (OR 1.3).

Conclusions:

• Continuing ASA or NSAIDs does not elevate the risk of postpolypectomy bleeding.
• Withholding ASA/NSAIDs before colonoscopy and polypectomy is not necessary.
• This finding supports current clinical practice adjustments based on emerging evidence.