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

Table 6 Angles of vision with the camera at 30º located 6 cm right or left from the midline

	D (cm)
X (cm)	2	3	4	5	6	7	8	9	10
10	94.99	96.87	98.66	100.36	101.99	103.53	105.00	106.40	107.73
11	92.47	94.29	96.03	97.69	99.29	100.82	102.27	103.67	105.00
12	90.26	92.01	93.69	95.31	96.87	98.37	99.81	101.19	102.51
13	88.30	89.98	91.61	93.18	94.70	96.16	97.57	98.93	100.24
14	86.57	88.18	89.74	91.26	92.74	94.16	95.54	96.87	98.16
15	85.02	86.57	88.07	89.54	90.96	92.35	93.69	94.99	96.25
16	83.63	85.11	86.57	87.98	89.36	90.70	92.01	93.27	94.51
17	82.38	83.81	85.20	86.57	87.90	89.20	90.47	91.70	92.91
18	81.25	82.62	83.96	85.28	86.57	87.82	89.05	90.26	91.43
19	80.22	81.54	82.83	84.10	85.35	86.57	87.76	88.93	90.07
20	79.29	80.56	81.80	83.03	84.23	85.41	86.57	87.70	88.81
21	78.43	79.65	80.85	82.04	83.20	84.34	85.46	86.57	87.65
22	77.65	78.82	79.98	81.12	82.25	83.36	84.44	85.51	86.57
23	76.93	78.06	79.18	80.28	81.37	82.44	83.50	84.54	85.56
24	76.26	77.35	78.43	79.50	80.56	81.60	82.62	83.63	84.62
25	75.64	76.70	77.74	78.78	79.80	80.81	81.80	82.78	83.75