Combined ultrasonic aspiration and saline-linked radiofrequency precoagulation: a step toward bloodless liver resection without the need of liver inflow occlusion: analysis of 313 consecutive patients

Table 4 Factors that potentially affect blood loss during parenchymal transaction and the overall amount of intraoperative blood loss

Clinical factor	Number	Blood loss during parenchyma transaction mean (SD), ml	P-value	Overall amount of intraoperative blood loss mean (SD), ml	P-value
Overall	313	221.63 (223.66)		376.77 (334.92)
Gender
Female	137	220.8 (206.77)	0.789	358.91 (294.54)	0.374
Male	176	222.27 (236.55)	0.789	390.68 (363.49)	0.374
Age (years)
≤60	138	234 (258.84)	0.366	405.65 (398.17)	0.383
>60	175	211.9 (191.64)	0.366	354.01 (274.09)	0.383
Concomitant procedures
Yes	41	188.78 (75.14)	0.719	500.98 (434.44)	0.001
No	272	226.58 (237.84)	0.719	358.05 (314)	0.001
Extent of resection
Major	199	273.42 (264)	< 0.001	436.38 (346.76)	< 0.001
Minor	114	131.23 (55.06)	< 0.001	272.72 (286.08)	< 0.001
Re-do hepatic resection
Yes	42	247.14 (306.27)	0.228	539.29 (436.01)	< 0.001
No	271	217.68 (208.43)	0.228	351.59 (309.85)	< 0.001
Type of minor liver resection
Anatomic	75	123.87 (50.05)	0.088	278 (323.42)	0.56
Non-anatomic	39	145.38 (61.85)	0.088	262.56 (198.78)	0.56

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