在心脏体外循环手术中,患者在术前必须角肝素抗凝,使其达到肝素化。根据患者体重等项,对人体总血量进行推算,再换算出肝素需用量。肝素每安瓶含100mg/m1,但由手出厂批号不同,其效价也有差异;或因肝素过期效价降低,故按常规法换算出肝素用量往往不够。为此临床科向我们提出能否测定肝素效 During cardiopulmonary bypass surgery, patients have to be given anticoagulant heparin to achieve heparinization. According to the patient’s weight and other items, the total amount of blood on the human body projections, and then calculate the amount of heparin required. Heparin per ampoule containing 100mg / m1, but by different hand factory lottery, the potency are also different; or due to heparin expired titer lower, so according to the conventional method is not enough to calculate the amount of heparin. For this clinical department to us whether the determination of heparin effect