Does Early Re-administration of Aspirin/Clopidogrel Increase the Risk of Bleeding From Artificial Ulcer After EMR or ESD?

Phase 4

• Conditions: Early Gastric Cancer; Gastric Dysplasia
• Interventions: Drug: aspirin and/or clopidogrel

• Registration Number: NCT01621451
• Lead Sponsor: Asan Medical Center

Brief Summary

Aspirin and/or clopidogrel users are increasing due to increased prevalence of cardiovascular or cerebrovascular disease with an aging society in Korea. Also, the patients having endoscopic mucosal resection (EMR) or endoscopic submucosal dissection (ESD) for early gastric cancer or gastric premalignant lesions including adenoma and dysplasia are increasing among aspirin and/or clopidogrel users. Practically, aspirin or clopidogrel is recommended to be stopped for 5\~14 days before EMR or ESD because bleeding risk during or after procedure. And it is recommended to restart of aspirin and/or clopidogrel as soon as possible if immediate bleeding during or after the procedure is not occurred in consideration of thromboembolic risk. However, early restarting of aspirin and/or clopidogrel raise the risk of delayed bleeding and the risk of complications associated with delayed ulcer healing. Although it is important to determine the timing of restarting aspirin and/or clopidogrel in consideration of complications of post-EMR/ESD ulcer and thromboembolic risk, there is no definite guideline about the timing of restarting aspirin and/or clopidogrel.

This study is aimed to determine the timing of restarting aspirin and/or clopidogrel for the patients having EMR or ESD among aspirin and/or clopidogrel users. The investigators planned to compare the delayed bleeding rate and ulcer healing rate in patients with post-EMR/ESD ulcer when take proton pump inhibitor (pantoprazole 40 mg per day) between the patients restarting aspirin and/or clopidogrel within 3\~4 days after the procedure and the patients restarting aspirin and/or clopidogrel 2 weeks after the procedure during 4 weeks. The primary endpoint is delayed ulcer bleeding rate at 4 weeks after EMR/ESD. The secondary end point is ulcer healing rate within 4 weeks.

Detailed Description

Not available

Study Timeline

• Study Start: 2012-06
• Study First Submitted: 2012-06-13
• Study First Submitted QC: 2012-06-15
• Study First Posted: 2012-06-18
• Status Verified: 2012-11
• Last Update Submitted: 2012-11-20
• Last Update Posted: 2012-11-22
• Primary Completion: 2014-05
• Study Completion: 2014-06

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 400

Inclusion Criteria

• Patients who have taken aspirin and/or clopidogrel for cardiovascular and/or cerebrovascular disease and are found to have early gastric cancer or premalignant lesions including adenoma and dysplasia by upper endoscopy.

Exclusion Criteria

• Patients with known coagulopathy or abnormal coagulation tests (prothrombin time, partial thromboplastin time and platelet count)
• Patients receiving other antithrombotic, anticoagulant drugs
• Patients needing continuation of nonsteroidal anti-inflammatory drugs, cyclooxygenase-2 (COX-2) inhibitors, or steroid after EMR/ESD
• Patient with recent percutaneous coronary intervention (placement of drug eluting coronary artery stent within 12 months, bare metal coronary artery stents within 1 month)
• Patient's age > 80 year-old or < 18 year-old
• Patient with severe cardiovascular, pulmonary, hepatic, or renal disease

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
immediate	aspirin and/or clopidogrel	Patients who receive pantoprazole plus aspirin and/or clopidogrel within 3\~4 days after EMR/ESD
2 weeks	aspirin and/or clopidogrel	Patients who receive pantoprazole plus aspirin and/or clopidogrel at 2 weeks after EMR/ESD

Primary Outcome Measures

Name	Time	Method
delayed ulcer bleeding	4 weeks

Secondary Outcome Measures

Name	Time	Method
ulcer healing rate	4 weeks

Trial Locations

Locations (1)

Asan Medical Center; 🇰🇷 Seoul, Korea, Republic of