2005年版《中国药典》(公示稿)中药材部分修订动向

目的 :及时掌握2005年版《中国药典》中药材部分修订动向 ,为修订工作建言献策。方法 :对2005年版《中国药典》(公示稿 )中药材部分新增品种、增订项目的变化动向进行详细分析。结果 :2005年版《中国药典》(公示稿 )中药材质量标准在继承传统经验鉴别———辨状论质的基础上 ,吸收了新的、成熟的技术 ,但仍有部分有待完善。结论 :新修订中药质量控制指标将更趋合理化、标准化 ,更接近国际天然药物质量标准。     

Measurement of thrombin generation intra-operatively and its association with bleeding tendency after cardiac surgery

Introduction

Patients undergoing cardiac surgery with cardiopulmonary bypass (CPB) are susceptible to haemostatic disturbances. Monitoring the haemostatic capacity by conventional clotting tests is challenging.

Materials and Methods

Thrombin generation (TG) by Calibrated Automated Thrombography, clotting tests and tissue factor pathway inhibitor (TFPI) measurements were performed to describe the relationship between haemostatic changes and alterations in these tests. Blood samples were collected before, during and after CPB. Furthermore, it was investigated whether TG measured intraoperatively, is associated with increased risk of bleeding postoperatively.

Results

TG diminished significantly (p < 0.01) after heparinization in the presence and absence of platelets (37% and 50%) compared to baseline. After the start of CPB, TG elevated and persisted till the end of surgery but remained lower than preoperatively. Activated clotting time increased after heparinization and after the start of bypass compared to baseline (400% and 500%). Anti-FXa activity reduced on the start of CPB compared to the level after heparinization, to almost the baseline value following protamine reversal of heparin. The plasma levels of total and free TFPI elevated 9 and 14 fold during bypass and remained after protamine administration higher than preoperatively. Plasma D-dimer levels reduced (p < 0.01) when bypass started. However, a marked elevation was observed in the following time points. TG in platelet-rich plasma measured after heparinization and after the start of CPB associated (p < 0.05) with postoperative blood loss.

Conclusions

TG can be determined during CPB despite the high heparinization level, it reflects the haemostatic capacity better than clotting-based assays and might better predict bleeding when performed intraoperatively.     

EPZ011989, A Potent,Orally-Available EZH2 Inhibitor with Robust in Vivo Activity

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