Sixty patients with colorectal cancer undergoing elective laparoscopic radical surgery were randomized to receive preoperative bowel preparation using oral intestinal antimicrobial agents ( n = 20 ) or using oral intestinal probiotics ( Jinshuangqi Tablets , 2.0 g , 3 times daily ) since the fifth day before the operation and at 24 h after the operation for 7 consecutive days .
