Preoperative calculation of angles of vision and working area in laparoscopic surgery to treat a giant hiatal hernia

Table 4 Operative angles with standard trocars located 6 cm right or left from the midline

	D (cm)
X (cm)	2	3	4	5	6	7	8	9	10
10	34.99	36.87	38.66	40.36	41.99	43.53	45.00	46.40	47.73
11	32.47	34.29	36.03	37.69	39.29	40.82	42.27	43.67	45.00
12	30.26	32.01	33.69	35.31	36.87	38.37	39.81	41.19	42.51
13	28.30	29.98	31.61	33.18	34.70	36.16	37.57	38.93	40.24
14	26.57	28.18	29.74	31.26	32.74	34.16	35.54	36.87	38.16
15	25.02	26.57	28.07	29.54	30.96	32.35	33.69	34.99	36.25
16	23.63	25.11	26.57	27.98	29.36	30.70	32.01	33.27	34.51
17	22.38	23.81	25.20	26.57	27.90	29.20	30.47	31.70	32.91
18	21.25	22.62	23.96	25.28	26.57	27.82	29.05	30.26	31.43
19	20.22	21.54	22.83	24.10	25.35	26.57	27.76	28.93	30.07
20	19.29	20.56	21.80	23.03	24.23	25.41	26.57	27.70	28.81
21	18.43	19.65	20.85	22.04	23.20	24.34	25.46	26.57	27.65
22	17.65	18.82	19.98	21.12	22.25	23.36	24.44	25.51	26.57
23	16.93	18.06	19.18	20.28	21.37	22.44	23.50	24.54	25.56
24	16.26	17.35	18.43	19.50	20.56	21.60	22.62	23.63	24.62
25	15.64	16.70	17.74	18.78	19.80	20.81	21.80	22.78	23.75