Results 18 of them were converted to open cholecystectomy due to severe adhesion of Calot's triangle, atrophy of gall bladder or severe adhesion of peritoneal cavity caused by prior abdominal operation. 结果18例因胆囊Calot三角严重粘连、胆囊完全萎缩或既往有上腹部手术史,致使腹腔广泛粘连者中转开腹。