Performing robot-assisted pylorus and vagus nerve-preserving gastrectomy for early gastric cancer: A case series of initial experience

Table 1 The general clinical data of 11 patients

No.	Sex	Year	Body mass index (kg/m2)	Operative time (min)	Tumor size (cm)	pT	pN	Histology	Number of resected lymph nodes	Number of metastatic lymph nodes
11	M	70	24.20	300	7	3	2	Poorly	29	3
2	M	62	21.70	390	2	1b	0	Well	19	0
3	F	64	20.70	330	3	1a	0	Medium	32	0
4	M	56	27.10	315	3	1a	0	Signet ring cell	8	0
51	M	65	29.50	325	4	4a	3	Poorly	51	13
6	F	72	26.20	410	1.5	1a	0	Well	9	0
7	M	70	26.42	330	2.5	1a	0	Poorly	21	0
81	M	79	28.73	240	3	2	0	Poorly	12	0
9	M	52	28.02	270	3	1a	0	Medium	13	0
10	M	66	23.95	300	2	1a	0	Well	11	0
11	F	66	25.08	300	4	1b	2	Poorly	36	3

¹Cases do not meet the inclusion criteria, and these case data are excluded from statistics.

Table 2 Patient characteristics

Variables	mean ± SD, n = 8
Age (yr)	63.50 ± 6.74 (52.0-72.0)
Sex (male/female)	5/3
Body mass index (kg/m2)	24.90 ± 2.60 (20.70-28.02)
ASA status
I	7
II	1
Comorbidity
Chronic obstructive pulmonary dysfunction	0
Diabetes	0
Valvular heart disease	0
Chronic atrial fibrillation	0
Hypertension	1
Occlusive vascular disease	0
History of appendectomy	1

Table 3 Intraoperative data and early outcome

Variables	mean ± SD, n = 8
Operative time (min)	330.63 ± 47.24 (270.0-410.0)
Estimated blood loss (mL)	57.50 ± 37.70 (10.0-100.0)
Postoperative hospital stay (d)	10.13 ± 4.55 (6.0-18.0)
Time to first flatus (d)	3.75 ± 2.49 (2.0-9.0)
Time to diet (d)
Liquid	5.38 ± 2.56 (3.0-11.0)
Solid	7.63 ± 2.67 (5.0-13.0)
Morbidity
Stomach stasis	1
Atelectasis	0
Incision infection	1
Anastomotic leakage	0
Hyperamylasemia	1
Valvular heart disease	0
Ascites	0
Trocar bleeding	0
Ileus	0

Table 4 Pathologica features

Variables	mean ± SD, n = 8
T
T1a	6
T1b	2
N
N0	7
N2	1
Stage (8th AJCC TNM staging system for gastric cancer)
IA	7
IIA	1
Histology
Well	3
Medium	2
Poorly	2
Signet ring cell	1
Size of tumor (cm)	2.66 ± 0.82 (1.5-4.0)
Distance between anastomosis and pylorus (cm)	3.63 ± 0.88 (2.5-5.0)
Resection margins (cm)
Proximal	3.63 ± 1.19 (2.0-5.0)
Distal	3.50 ± 1.31 (2.0-5.0)
Mean resected Lymph nodes	18.63 ± 10.57 (8.0-36.0)
Number of metastatic lymph nodes	0.38 ± 1.06 (0-3)