放射免疫方法(RIA)测定血浆降钙素(CT)已广泛应用于临床诊断和治疗观察,但以前采用未提取血浆CT的方法,常使甲状腺疾病与高CT健康人及肺癌CT异位分泌疾病相混淆,造成误诊或不必要的手术。作者采用二氧化硅提取血浆RIA测定CT,使结果准确可靠,大大提高临床诊断的准确性。材料与方法:用合成人CT免疫羊制备抗血清。 Radioimmunoassay (RIA) determination of plasma calcitonin (CT) has been widely used in clinical diagnosis and treatment of observation, but the previous use of non-extracted plasma CT methods often make thyroid disease and high CT healthy people and CT ectopic secretion of lung cancer Confused, resulting in misdiagnosis or unnecessary surgery. The authors used silica extraction of plasma RIA CT, the results are accurate and reliable, greatly improving the accuracy of clinical diagnosis. MATERIALS AND METHODS: Antisera were prepared from synthetic human CT immunized sheep.