Leutloff U C, Scharf J, Richter G M, Libicher M, Wunsch A, Schenk J P, Kauffmann G W
Abteilung Radiodiagnostik, Radiologische Universitätsklinik, Heidelberg.
Radiologe. 1998 May;38(5):399-404. doi: 10.1007/s001170050371.
A study was carried out to determine whether an improvement in the detection of vascular signals in patients after orthotopic liver transplantation can be achieved by the use of ultrasound contrast medium in colour Doppler sonography.
In the early postoperative follow-up of liver transplant recipients, 31 colour Doppler sonograms were obtained in 21 patients before and after intravenous injection of the ultrasound contrast agent Levovist (Schering, Berlin). A grading score with four categories was used to evaluate the sonograms with special regard to the visibility of colour and flow signals in the hepatic artery and also in the portal vein and the hepatic veins. The arterial and portal venous signals were evaluated in the hepatic portal and in the left and right lobe.
With contrast enhancement significantly better arterial signals were seen in 20 of 31 sonograms for the hepatic portal, in 22 for the right lobe and in 26 for the left lobe. Better portal vein signals were obtained in 17 of 31 examinations for the right lobe and in 16 for the left lobe; only little improvement was obtained for the main stem of the portal vein. For the hepatic veins there was no significant improvement.
Early vascular complications after liver transplantation usually occur in the hepatic arteries. With the use of contrast-enhanced colour Doppler sonography, better detection of arterial and peripheral portal signals can be achieved; peripheral portal vein branches can be helpful in finding small arteries.
开展了一项研究，以确定在原位肝移植患者中，彩色多普勒超声检查使用超声造影剂是否能改善血管信号的检测。
在肝移植受者术后早期随访中，对21例患者在静脉注射超声造影剂声诺维（先灵公司，柏林）前后获取了31幅彩色多普勒超声图像。采用一个分为四类的分级评分系统，特别针对肝动脉、门静脉及肝静脉中彩色和血流信号的可见性来评估这些超声图像。在肝门以及左、右叶评估动脉和门静脉信号。
通过造影增强，在31幅超声图像中，肝门处有20幅、右叶有22幅、左叶有26幅可见明显更好的动脉信号。右叶在31次检查中有17次、左叶有16次获得了更好的门静脉信号；门静脉主干仅有轻微改善。肝静脉未见明显改善。
肝移植术后早期血管并发症通常发生在肝动脉。使用造影增强彩色多普勒超声检查，可更好地检测动脉和外周门静脉信号；外周门静脉分支有助于发现小动脉。
