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99Tcm-二乙基亚氨基二乙酸(99Tcm-diethyl imin-odiacetic acid, 99Tcm-EHIDA)肝胆显像在鉴别诊断婴儿肝炎综合征及先天性胆道闭锁方面的价值已得到业内公认,其对先天性胆道闭锁的诊断灵敏度可达100% [1-3]。但由于EHIDA本身的化学结构,肝细胞摄取显像剂的量与血液内胆红素水平呈负相关,对于那些重度淤胆型婴儿肝炎综合征来说,血液内胆红素水平很高,肝细胞功能受损,传统的99Tcm-EHIDA肝胆显像常常会出现假阳性的结果[4-6]。而99Tcm-MIBI作为传统心肌灌注显像剂,其经肝胆排泄的过程也为大家熟知。如何将二者联合,取长补短,本研究进行了初步探讨,现报道如下。
99Tcm-MIBI诊断重度淤胆型婴儿肝炎综合征的价值
99Tcm-MIBI hepatobiliary scintigraphy in peadiatric patients with severe cholestatic infant hepatitis syndrome
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摘要:
目的 鉴于99Tcm-二乙基亚氨基二乙酸(99Tcm-EHIDA)肝胆显像对临床重度淤胆患儿应用的局限性,试用99Tcm-甲氧基异丁基异腈(99Tcm-MIBI)作为新的肝胆显像剂,了解其应用基础及对重度淤胆患儿的初步诊断价值。 方法 建立胆总管闭锁动物模型,了解99Tcm-MIBI肝胆显像的应用基础;对重度淤胆并最终临床证实为婴儿肝炎综合征的27例患儿先行常规99Tcm-EHIDA肝胆显像,次日行24h延迟显像,1h后再行99Tcm-MIBI肝胆显像。比较两种显像剂对重度淤胆型婴儿肝炎综合征的诊断价值。 结果 动物实验证明,99Tcm-MIBI确经肝胆排泄,且无明显肠道自分泌现象,可以用作肝胆显像。初步临床诊断表明,99Tcm-MIBI肝胆显像对重度淤胆型婴儿肝炎综合征的诊断灵敏度达100%,远远高于常规99Tcm-EHIDA肝胆显像(66.67%)。 结论 对临床高度怀疑的重度淤胆型婴儿肝炎综合征,99Tcm-MIBI肝胆显像的诊断灵敏度明显高于常规99Tcm-EHIDA肝胆显像。 -
关键词:
- 胆汁淤积 /
- 肝炎 /
- 婴儿 /
- 99m锝甲氧基异丁基异腈 /
- 99m锝二乙基-亚氨基二乙酸
Abstract:Objective Because of the limited of 99Tcm-diethyl iminodiacetic acid(99Tcm-EHIDA) hepatobiliary scintigraphy in the diagnosis of severe cholestatic infant hepatitis syndrome, trial use 99Tcm-methoxy isobutyl isonitrile(99Tcm-MIBI) as a new hepatobiliary scintigraphy imaging agent to understand its applied basis and primary evaluate value in diagnosis of severe cholestatic infant hepatitis syndrome. Methods Constructed choledochal atresia animal model and investigated the application basis of 99Tcm-MIBI hepatobiliary scintigraphy. Twenty-seven children patients of severe cholestatic who finally confirmed infant hepatitis syndrome were underwent firstly 99Tcm-EHIDA hepatobiliary scintigraphy. After 24 h delay imaging next day, 99Tcm-MIBI hepatobiliary scintigraphy was underwent after 1 h. Two imaging agents of value in the diagnosis of severe cholestatic infant hepatitis syndrome were compared. Results It was proved that 99Tcm-MIBI was surely excreted by hepatobiliary and had no intestinal autocrine phenomenon in animal test. So 99Tcm-MIBI can be used to undergo hepatobiliary scintigraphy. The sensitivity of 99Tcm-MIBI hepatobiliary scintigraphy in the diagnosis of severe cholestatic infant hepatitis syndrome was 100% in our primary clinical study. Its sensitivity was higher than which of 99Tcm-EHIDA hepatobiliary scintigraphy (66.67%) by far. Conclusions With regard to those children patients who suspected highly severe cholestatic infant hepatitis syndrome in clinical, the sensitivity of 99Tcm-MIBI hepatobiliary scintigraphy is obviously superior to conventional 99Tcm-EHIDA hepatobiliary scintigraphy. -
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