胆道感染发生的条件是胆管内有细菌、胆管内压力升高,足以引起细菌及其内毒素反流入血。胆道梗阻在胆道感染的发生中起着关键作用,其中胆管内结石、寄生虫引起的胆道梗阻最易促进胆道感染的发生。在胆道感染时,实验室检查的目的在于:①显示胆道梗阻;②确定胆道感染的存在;③判断有无并发 Biliary tract infection occurs in the bile duct bacteria, bile duct pressure increases, enough to cause bacteria and their endotoxin into the bloodstream. Biliary obstruction in the occurrence of biliary tract infection plays a key role, including bile duct stones, parasite-induced biliary obstruction is most likely to promote the occurrence of biliary tract infection. In the biliary tract infection, the purpose of laboratory tests are: ① show biliary obstruction; ② determine the presence of biliary tract infection; ③ determine whether the concurrency