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

Study Overview
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Brief Summary
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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.

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

Conditions
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Early Gastric Cancer, Gastric Dysplasia

Intervention / Treatment
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* Drug: aspirin and/or clopidogrel
* Drug: aspirin and/or clopidogrel


Participation Criteria
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Eligibility Criteria
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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

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: immediate<br>Patients who receive pantoprazole plus aspirin and/or clopidogrel within 3 4 days after EMR/ESD | Drug: aspirin and/or clopidogrel<br>* Patients who have taken aspirin and/or clopidogrel and are found to have early gastric cancer or gastric premalignant lesions including adenoma and dysplasia by upper endoscopy will be stopped aspirin and/or clopidogrel for 7 days before EMR/ESD. In immediate group, the patient will receive oral proton pump inhibitor (pantoprazole 40mg per day) for 4 weeks after EMR/ESD to treat their post-EMR/ESD ulcer.<br>|
| Active Comparator: 2 weeks<br>Patients who receive pantoprazole plus aspirin and/or clopidogrel at 2 weeks after EMR/ESD | Drug: aspirin and/or clopidogrel<br>* Patients who have taken aspirin and/or clopidogrel and are found to have early gastric cancer or gastric premalignant lesions including adenoma and dysplasia by upper endoscopy will be stopped aspirin and/or clopidogrel for 7 days before EMR/ESD. In 2 weeks group, the patient will receive oral proton pump inhibitor (pantoprazole 40mg per day) for 4 weeks after EMR/ESD to treat their post-EMR/ESD ulcer.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| delayed ulcer bleeding |  | 4 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| ulcer healing rate |  | 4 weeks |