42 Chapter 2 Table 1. Continued Author Year Country Study design Number of patients* Number of studies Aim of the study Type of resections included Yang et al. 110 2016 China RCT 79 N/A To evaluate the anti-infectious effects of perioperative probiotics treatment in patients undergoing CRC resection. All types of colorectal procedures Yang et al. 111 2019 China SR and MA 8456 24 To evaluate the current scientific evidence of LCA non-preservation versus LCA preservation in CRC surgery. All left colon or rectal cancer resections Yeung et al. 112 2021 MA MA 6647 23 To perform a MA of current CRP data in AL after colorectal surgery. All types of colorectal procedures Zhang et al. 113 2016 China MA 1803 11 To determine whether prophylactic placement of a drain in colorectal anastomosis can reduce postoperative complications. LAR Zhao et al. 114 2021 China RCT 560 N/A To assess the effect of TDT in AL prevention after laparoscopic LAR for rectal cancer. Laparoscopic LAR AR, anterior resection; CRC, colorectal cancer; CRP, c-reactive protein; ICG, indocyanine green; IMA, inferior mesenteric artery; LAR, low anterior resection; LCA, left colic artery; MA, meta-analyses; MBP, mechanical bowel preparation; POI, postoperative ileus; RCT, randomized controlled trial; SR, systematic review; SSI, surgical site infection; TDT, transanal drainage tubes, TME, total mesorectal excision. *only malignant cases/patients after oncological resections; - authors did not report a total amount of included patients or it was not clear to separate benign from malignant cases.
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