Abstract：
The morphometry and morphology of the components of extrahepatic biliary tree show extensive variations. A beforehand recognition of these variations is very crucial to prevent unintended complications while performing surgeries in this region. This study was conducted to analyse the configuration of the extrahepatic biliary tree and its possible variations, as well as measure the components that limit the cystohepatic triangle. Articles were searched in major online indexed databases (Medline and PubMed, Scopus, Embase, CINAHL Plus, Web of Science and Google Scholar) using relevant key words. A total of 73 articles matched the search criteria of which 55 articles were identified for data extraction. The length of left and right hepatic duct in majority of studies was found to be > 10 mm. A wide range of diameters of hepatic ducts were observed between 5 and 43 mm. The average length of cystic duct is around 20 mm. The length and diameter of the common bile duct are 50-150 mm and 3-9 mm, respectively. The most frequently observed pattern of insertion of cystic duct into common hepatic duct is right lateral, rarely anterior, or posterior spiral insertion can present. The results of this study will provide a standard reference range which instead will help to differentiate the normal and pathological conditions.
摘要：
肝外胆道树成分的形态计量学和形态显示出广泛的差异。事先识别这些变化对于在该区域进行手术时防止意外并发症非常关键。这项研究是为了分析肝外胆管树的构型及其可能的变异，以及测量限制囊肝三角的成分。在主要的在线索引数据库(Medline和PubMed，Scopus,Embase,CINAHLPlus,WebofScience和GoogleScholar)使用相关关键词。共有73篇文章符合搜索标准，其中55篇文章被确定用于数据提取。在大多数研究中，发现左和右肝导管的长度>10毫米。在5-43mm之间观察到宽范围的肝管直径。胆囊管的平均长度约为20mm。胆总管的长度和直径分别为50-150mm和3-9mm。最常见的胆囊管插入肝总管的模式是右外侧，很少前，或后螺旋插入可以存在。这项研究的结果将提供一个标准的参考范围，而这将有助于区分正常和病理状况。
