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

Table 1 Camera angles of vision 0º (δ = 0º and δ = 60º) (x = trocar-hiatus cm, D = hernia- hiatus diameter)

	D (cm)
X (cm)	2	3	4	5	6	7	8	9	10
10	35.71	38.53	41.31	44.04	46.70	49.29	51.80	54.23	56.57
11	35.19	37.77	40.30	42.80	45.26	47.65	49.98	52.25	54.44
12	34.76	37.13	39.46	41.77	44.04	46.26	48.43	50.56	52.62
13	34.40	36.58	38.75	40.89	42.99	45.07	47.10	49.09	51.04
14	34.09	36.12	38.13	40.12	42.09	44.04	45.95	47.82	49.65
15	33.81	35.71	37.59	39.46	41.31	43.13	44.93	46.70	48.43
16	33.58	35.36	37.13	38.88	40.62	42.34	44.04	45.71	47.35
17	33.37	35.04	36.71	38.37	40.01	41.63	43.24	44.83	46.39
18	33.18	34.76	36.34	37.91	39.46	41.00	42.53	44.04	45.52
19	33.01	34.51	36.01	37.50	38.97	40.44	41.89	43.32	44.74
20	32.86	34.29	35.71	37.13	38.53	39.93	41.31	42.68	44.04
21	32.73	34.09	35.44	36.79	38.13	39.46	40.78	42.09	43.39
22	32.60	33.90	35.19	36.48	37.77	39.04	40.30	41.56	42.80
23	32.49	33.73	34.97	36.20	37.43	38.65	39.87	41.07	42.26
24	32.39	33.58	34.76	35.95	37.13	38.30	39.46	40.62	41.77
25	32.29	33.43	34.57	35.71	36.84	37.97	39.09	40.20	41.31