umbilical port, and the epigastric and medial right subcostal ports are created, the pigtail catheter is pulled upwards to act as the fourth port to lift the gallbladder fundus (Fig 2). This technique facilitates the dissection of Calot's triangle and achieves satisfactory haemostasis. After gallbladder removal, the curved catheter tip and thread can be seen well fixed in the liver bed and serving as an anchor (Fig 3). DISCUSSIONThis technique can reduce the number of ports used in laparoscopic cholecystectomy following PTGBD in patients with acute cholecystitis.