The investigators will collect the pre-operative medical history and arrange physical
examination, life quality evaluation, blood and biochemical test. The Patients with acute
cholecytitis, gallstone or gallbladder polyp without interventional treatment or
cholecystitis after percurtaneus gallbladder drainage(PTGBD) were involved in this study.
Four laparoscopic ports were introduced and the pneumoperitoneum (12mmHg) was established. In
study group , ICG was give by intra-gallbladder injection or systemic injection, the
cholecystectomy were performed . In control group, no ICG was given and traditional
cholecystectomy were performed. A near-infrared optimized laparoscope was used to detect the
ICG fluorescence signal arising from gallbladder , cystic duct and common bile duct before
cholecystectomy in study group. According to the enhancement of ICG, the cholecystectomy was
started from cystic duct in Calot's triangle.Time to gallbladder removed was recorded.
Conversion rate, post-operative morbidity and mortality will be recorded as well .