内镜取石治疗主要采用还纳法和非还纳法，不能还纳的结石应用乳头括约肌切开术辅助插管和取石，结石常在乳头括约肌切开后自行脱出。
Endoscopic stone extraction included movable stones that could be returned into common bile duct and irremovable stones that should be intubated and extracted aided by EST ( endoscopic sphincterotomy ) .
石常在