Study of celiac artery variations and related surgical techniques in gastric cancer

Table 4 Comparison of observations between ultrasonic harmonic scalpel subgroup and electrical unit subgroup among vascular variation population

Observation	Ultrasonic harmonic scalpel group	Electrical unit subgroup	t value	P value
Cases (persons)	44	36
Operation duration (min)	209.5 ± 34.9	226.9 ± 29.4	1.168	0.046
Intraoperative blood loss (mL)	207.5 ± 57.1	235.6 ± 52.9	2.242	0.028
Total number of lymph nodes dissected	25.5 ± 9.2	19.9 ± 7.8	2.903	0.005
Time required for postoperative recovery of bowel function (d)	3.0 ± 0.9	3.1 ± 0.8	0.442	0.660
Time to ambulation (d)	4.0 ± 0.9	3.9 ± 0.8	0.291	0.772
Postoperative hospitalization (d)	7.4 ± 1.3	8.1 ± 1.1	1.251	0.101
Mean drainage amount in 3 d after operation (mL)	184.4 ± 38.2	205.0 ± 42.9	2.255	0.027
Total hospitalization cost (RMB)	36167.3 ± 2845.6	35246.4 ± 2789.5	1.236	0.102