Vascular anatomy of inferior mesenteric artery in laparoscopic radical resection with the preservation of left colic artery for rectal cancer

Table 1 Patient characteristic data

Factors	Type A (n = 51)	Type B (n = 26)	Type C (n = 33)	Statistical value	P value
Age (yr, mean ± SD)	58.6 ± 14.1	60.4 ± 15.0	62.3 ± 12.9	F = 2.881	0.06
Male, n (%)	31 (60.8)	15 (57.7)	18 (54.5)	Pearson χ2 = 0.324	0.85
BMI (kg/m2)	25.3 ± 5.4	24.8 ± 4.9	25.1 ± 4.6	F = 0.331	0.72
Stage (UICC 8th)				Fisher = 1.510	0.84
I	7	5	6
II	26	10	16
III	18	11	11

P < 0.05. BMI: Body mass index; UICC: Union for International Cancer Control.

Table 2 Results of vascular anatomy

Factors	Type A (n = 51)	Type B (n = 26)	Type C (n = 33)	Statistical value	P value
Length from the IMA to the LCA (mm) (mean ± SD)	35.2 ± 8.7	37.8 ± 9.4	41.3 ± 11.5	F = 1.976	0.144
No. of LCA under IMV	27 (52.9%)	14 (53.8%)	20 (60.6%)	Pearson χ2 = 0.512	0.802

P < 0.05. IMA: Inferior mesenteric artery; IMV: Inferior mesenteric vein; LCA: Left colic artery.

Table 3 Surgical outcome of patients

	Type A (n = 51)	Type B (n = 26)	Type C (n = 33)	Statistical value	P value
Operation time (min)	153.4 ± 26.8	168.7 ± 31.6	161.4 ± 25.8	F = 1.618	0.20
Blood loss (g)	37.5 ± 18.4	42.1 ± 17.7	39.6 ± 20.1	F = 1.383	0.26
Lymph node numbers (n, mean ± SD)	15.7 ± 8.3	17.2 ± 8.1	16.8 ± 9.0	F = 0.620	0.54
Metastasis to station 253 lymph nodes (n)	2	1	1	Fisher = 0.368	1.00
Anastomotic bleeding	1		1	Fisher = 0.930	0.10
Anastomotic leakage	1	1		Fisher = 1.407	0.72
Postoperative hospitalized days	9 (7-21)	9 (6-18)	9 (7-13)	χ2 = 0.863	0.65

P < 0.05.