手推法在肝脏MRI动态增强扫描中的临床应用
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时间:2009-02-03 16:50:49 来源: 作者: |
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The clinical application of hepatic MRI dynamic contrast - enhanced effect with the hand bolus injection method
MING Xiu yun, FAN Xiao-yun, CHEN Gui-fen. The First People's Hospital of Yan Cheng, Jiang Su 224001
[Abstract] Objective To evaluate the hepatic MRI dynamic contrast - enhanced effect with the hand bolus injection. Methods 150 cases were using hand bolus injection method, then the different enhacement of abdominal aorta, venacava, hepatic artery and portal veinand delayhepatic were observed in the period of abdominal hepatic. Method in The SPGR dynamic MR imaging of liver. Results 150 cases were succeeded by using hand bolus injection. Conclusion The same effect of MRI enhancement scanning can be obtained using hand or high pressuresyringe. MRI with blous injection usage of by hand injector can satisfy the diagnosis for hepatic diseases. Better enhanced effect can be obtained by using the hand bolus injection method. This method is an simple, cost, safe and reliable method, which can be used widely in the more fundamental hospitals.
[Key words] hand bolus injection method; MRI dynamic contrast enhanced; liver
肝脏病变的MRI检查,是多参数、多序列检查,平扫能提供了较多的优质图像和形态学信息,磁共振动态增强扫描是一项非常重要的技术,它在疾病的诊断、定性等方面起着至关重要的作用,是磁共振扫描诊断中不可缺少的一部分。磁共振动态增强扫描更有利于病灶的定性,在小病灶的检出率方面具有重要价值,尤其是对小肝癌更具有重要临床意义。
过去本院采用高压注射器进行肝脏MRI动态增强扫描,因一人一管费用较高,既给医院增加了支出,也给患者增加了经济负担。为了增加社会、经济效益,不影响临床的诊断效果,手推的方法所用医疗器械简单,易得,方法简单,使用得当完全可以达到与高压注射器一样的流速和团注效果[1],我们尝试用手推快速注射造影剂方法行动态增强扫描(简称手推法)。为客观评估手推法的动态增强效果,我们对手推法及高压器法行肝脏MRI增强扫描进行了比较研究。本文旨在探讨手推注射法在肝脏动态增强扫描中的临床应用价值。
材料和方法
1.一般资料 收集2007年3月~2008年5月期间150例拟诊为肝脏病变的病例进行了肝脏磁共振动态增强扫描,其中男性95例,女性55例,年龄19~83岁,平均54岁。
2.手推注射方法 用20ml注射器抽对比剂,用5ml注射器抽生理盐水5ml,接上输液用9号针头,选用手背、腕部、上肢前臂等处稍大些静脉(一般不选用肘部正中静脉,因为患者检查时双上肢上举,肘部弯曲容易使针头移位。)先缓慢注射生理盐水少许确保静脉通路通畅。两人合作进行检查,一人在操作台前观察时间,通知注射药物时间、患者屏气时间、掌握扫描时间。另一人听到通知后立即快速注射对比剂,对比剂为Gd-DTPA,用药总量根据患者体重,按0.2m/kg体重计算,注射速率为2~3ml/s,推注时间5~10s。
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