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Background Due to the radial artery approach has advantages of min-invasive and quick recovery,it has been widely used in percutaneous coronary intervention.However,the proximal radial artery must be heparinized intraoperative and postoperative.Especially antiplatelet activation drugs(clopidogrel,aspirin etc.) application could increase bleeding risk of the radial artery,lead to prolong oppression of the puncture site.Therefor to reduce oppression time and complications become more and more important in clinical nursing.This study was to observe the hemostat machines effect and on the puncture site of radial artery after percutaneous coronary intervention.