Table 1.

Insufflated volume, intraabdominal pressure and expansion of the abdomen during preoperative progressive pneumoperitoneum of the patients.

Case 1
Days	Nitrous oxide volume (cc)	Intra-abdominal pressure (mm Hg)	Expansion (cm)
1	2000	4	3.4
2	3100	5	6.5
3	4000	5	9.5
4	4500	8	11
5	5000	11	NA
6	5500	13	NA
7	5800	16	NA
8	6200	19	NA
9	6800	17	NA
10	6200	11	NA
11	NA	NA	NA
12	7100	21	NA
13	7000	21	21
14	7000	27	NA
15	7100	31	NA
16	7100	28	11
17	7200	28	NA
18	7400	29	NA
Case 2
1	1500	8	2.5
2	2100	9	5
3	2500	13	10
4	3000	15	11