Table 3.

Peri-operative data

	Learning Curve (30)b	Subsequent Procedures (96)
Mean operative time (min)	137.33 (range 100–180)	96.5(range 75–110)*
Mean Intraoperative blood loss (ml)	160.2 (range 60–280)	90.5 (range 50–200)*(p < 0,01)
Hypertensive crises (SBP > 180 mmHg)	4/30 (13.3%)	12/96 (12.5%)
Hypotensive crises (SBP < 90 mmHg)	0/30 (0%)	4/96 (4.1%)
Conversion to open procedure (n)	1/30 (3.3%)	0/96 (0%)
30-day morbiditya (n)	3/30 (10%)	5/96 (5.2%)*(p = 0,025)
Mean Hospital stay (days)	4.5 (3–8 days)	3.4 (range 2–10 days)

Legend: (n) = number; (cm, ml, mmHg) = measurements; (min, days) = time

*statistically significant difference (p < 0,05)

^aabdominal wall hematoma, pneumonia, port site hernia, intra-abdominal collection

^b30 procedures were considered learning curve, basing on literature [12–14]