Routine bag extraction of gallbladder during elective laparoscopic cholecystectomy: a prospective randomized controlled trial

INTERVENTION: Group A:Bag extraction;Group B:Without Bag extraction; CONDITION: gallbladder disease PRIMARY OUTCOME: Superficial wound infection;Abdominal cavity infection;Bile or gallstone spillag;Gallstones lost in the abdominal cavity;Clips lost in the abdominal cavity;Port site metastases of incidental gallbladder cancer; SECONDARY OUTCOME: Mortality;Morbidity;Operative time;Hospital cost; INCLUSION CRITERIA: 1. Symptomatic gallstones; 2. Elective laparoscopic cholecystectomy; 3. ASA I or II; 4. Age 18 to 70 years.