[RESULTS] While intraoperative parameters such as the entry time ( 71.9 3.7 vs 215.1 6.2 seconds ) and blood loss value ( 9.7 6.1 vs 12.2 2.9 mL ) were significantly reduced in the DOE group in comparison with those of OHT group ( respectively , P < .0001 and < .01 ) , there were also trends to slight decrease of the occurrence of the minor injuries , manifested as omental small vessels rupture ( 0 of 108 vs 4 of 116 ) and punctures and pinches of jejunal serosa ( 0 of 108 vs 3 of 116 ) in patients of the DOE group in comparison with those of OHT group ( respectively , P = .0515 and = .0925 ) .