[Peroperative echography in hepatobiliary surgery].

Intra-operative ultrasound allows to know precisely the intra-hepatic vascular anatomy and, by defining the precise relationship between tumor and vascular structures, has modified the therapeutic strategy in surgery of hepatic tumors. In biliary surgery, this procedure is useful in intrahepatic lithiasis. In surgery of digestive cancer, it permits to detect unknown hepatic metastases which may change the type of surgery indicated.