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首页> 外文期刊>Circulation journal >Effect of 150-mg vs 300-mg Loading Doses of Clopidogrel on Platelet Function in Japanese Patients Undergoing Coronary Stent Placement
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Effect of 150-mg vs 300-mg Loading Doses of Clopidogrel on Platelet Function in Japanese Patients Undergoing Coronary Stent Placement

机译:氯吡格雷150 mg和300 mg负荷剂量对日本冠状动脉支架置入术患者血小板功能的影响

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Background The loading dose of ticlopidine is 500 mg in both the US and Europe and 200 mg in Japan. A lower loading dose of clopidogrel might achieve adequate platelet inhibition in Japanese patients.Methods and Results Platelet aggregation was serially measured at baseline, and 2,4, 6, and 8 h after 150-mg (n=20) and 300-mg (n=20) clopidogrel loading. Platelets were stimulated with 5 and 20mumol/L adenosine diphosphate (ADP) and aggregation was assessed by optical aggregometry. Pretreatment ADP-induced platelet aggregation in the 150-mg clopidogrel group did not differ from that of the 300-mg group. The administration of 300-mg clopidogrel loading dose resulted in lower platelet aggregation 2h after the administration (5mumol/L ADP: 53+-9% vs 61+-12%, p<0.05 and 20mumol/L ADP: 61+10% vs 68+9%, p<0.05). A lower platelet aggregation induced with 20mumol/L ADP was still observed 4h after the 300-mg clopidogrel loading (58+-10% vs 65+-9%, p<0.05).Conclusions The 150-mg clopidogrel loading does not achieverapid platelet inhibition. The 300-mg loading dose should be used to suppress platelet function rapidly even in Japanese patients undergoing coronary stent placement.
机译:背景技术噻氯匹定的剂量在美国和欧洲均为500 mg,在日本为200 mg。在日本患者中,较低的氯吡格雷负荷量可能会实现足够的血小板抑制。方法和结果在基线,150 mg(n = 20)和300 mg(n = 2)后的2,4、6和8 h连续测量血小板凝集。 n = 20)氯吡格雷负载。用5和20μmol/ L的二磷酸腺苷(ADP)刺激血小板,并通过光学聚集法评估聚集。 150 mg氯吡格雷组的预处理ADP诱导的血小板聚集与300 mg组无差异。服用300 mg氯吡格雷负荷量后2h血小板聚集降低(5mumol / L ADP:53 + -9%vs 61 + -12%,p <0.05和20mumol / L ADP:61 + 10%vs 68 + 9%,p <0.05)。 300 mg氯吡格雷负荷后4h仍观察到20μmol/ L ADP引起的血小板聚集降低(58 + -10%vs 65 + -9%,p <0.05)。结论150 mg氯吡格雷负荷未达到快速血小板的作用。抑制。即使在接受冠状动脉支架置入术的日本患者中,也应使用300毫克负荷剂量来迅速抑制血小板功能。

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