Patients’ perioperative clinical characteristics
The results of peri-operative blood changes between the two groups are shown in Table 1. EBV, Hb loss, and IBL were similar in both groups. The mean TBL of LESS-M group was 479.8±315.6 mL, which is lower than the CLM group (490.1±361.7 mL). The VBL (p = 0.002) and post-operative drains (p = 0.000) in the LESS-M group were less than those in the CLM group. The mean HBL was 364.3±252.6 mL in the LESS-M group and 306.8±304.7 mL in the CLM group. And significant differences were observed in HBL as a % of true TBL (p=0.000) between the two groups, with a value of 74.4±22.4 % in the LESS-M group, and 58.9±30.2 % in the CLM group. However, the PBL volumes were not significantly different (p = 0.716) between the two groups.