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 .
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Hartmann's pouch identification ( white light and infrared fluroscence image)
Timeframe: intra-operative period
Cystic duct identification ( white light and infrared fluroscence image)
Timeframe: intra-operative period
CBD identification ( white light and infrared fluroscence image)
Timeframe: intra-operative period
CHD identification ( white light and infrared fluroscence image)
Timeframe: intra-operative period
conversion rate
Timeframe: intra-operative period