Abstract
It has been suggested that bleeding time is predictor of abnormal bleeding in patients receiving antiplatelet therapy, but Duke bleeding time does not show actual platelet function. To assess platelet function in patients receiving aspirin, we analysed the Sonoclot signature in 12 patients taking aspirin. The peak signature was unclear in 5 of 12 patients with aspirin, and time to peak was prolonged in 1 patient There is a possibility of platelet dysfunction in patients receiving aspirin with normal Duke bleeding time, and Sonoclot is a useful monitor to detect platelet dysfunction.