你在服用抗凝药物（比如华法林，肝素）或者抗血小板聚集药物（阿司匹林或氯吡格雷）——一般情况下，在结肠镜检前应明停止服用这些药物，以防出血不止。
Are taking any blood-thinning drugs (such as warfarin or heparin) or antiplatelet medication (such as aspirin or clopidogrel)
结论CVVH中应用无肝素抗凝技术同样高效、稳定、安全，对于高危出血患者，是保障CVVH治疗持续进行的重要措施。
Conclusion Anticoagulation without heparin is high efficient, stable and safe. It is an important measure to ensure CVVH continuously for patients with high risk of bleeding.
对比研究了低抗凝活性肝素、商品肝素及以低抗凝活性肝素为原料制得的低分子肝素的免疫活性。
The immunocompetence of low molecular weight heparin(LMWH) derived from low anticoagulant activity heparin(LAAH), a by-product in commercial heparin production, was studied.
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