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

Table 2 Angles of vision with camera angle bevelled 30º (x = trocar-hiatus cm, D = hernia- hiatus diameter)

	D (cm)
X (cm)	2	3	4	5	6	7	8	9	10
10	65.71	68.53	71.31	74.04	76.70	79.29	81.80	84.23	86.57
11	65.19	67.77	70.30	72.80	75.26	77.65	79.98	82.25	84.44
12	64.76	67.13	69.46	71.77	74.04	76.26	78.43	80.56	82.62
13	64.40	66.58	68.75	70.89	72.99	75.07	77.10	79.09	81.04
14	64.09	66.12	68.13	70.12	72.09	74.04	75.95	77.82	79.65
15	63.81	65.71	67.59	69.46	71.31	73.13	74.93	76.70	78.43
16	63.58	65.36	67.13	68.88	70.62	72.34	74.04	75.71	77.35
17	63.37	65.04	66.71	68.37	70.01	71.63	73.24	74.83	76.39
18	63.18	64.76	66.34	67.91	69.46	71.00	72.53	74.04	75.52
19	63.01	64.51	66.01	67.50	68.97	70.44	71.89	73.32	74.74
20	62.86	64.29	65.71	67.13	68.53	69.93	71.31	72.68	74.04
21	62.73	64.09	65.44	66.79	68.13	69.46	70.78	72.09	73.39
22	62.60	63.90	65.19	66.48	67.77	69.04	70.30	71.56	72.80
23	62.49	63.73	64.97	66.20	67.43	68.65	69.87	71.07	72.26
24	62.39	63.58	64.76	65.95	67.13	68.30	69.46	70.62	71.77
25	62.29	63.43	64.57	65.71	66.84	67.97	69.09	70.20	71.31