Page 39 - WJOLS

WJOLS

Is there an Ideal Port Position for Laparoscopic Urological Procedures?

2
Sixth: Tables 6A to D showed readings of timing taken readings obtained in minutes were validated by χ tests
for laparoscopic donor nephrectomy and manipulation and average obtained. The averages were 151.50, 128.50
angles were approximated nearest to 30, 60 and 90º. The and 158.83 respectively. Although, all the readings were
reproducible at p-value (11.070), 5% level of significance:
Table 6C: Approximate manipulation angle of 90º and timing of
donor nephrectomy in minutes it has clearly demonstrated that the 60º angle has shorter
Observed Expected (O-E) 2 operative time followed by 30º and then 90º, and the angle
Sl. no. (O) (E) O-E (O-E) 2 E 60º followed by 30º were more reproducible than 90º. This
1 142 158.83 – 16.83 283.43 1.78 is shown in Graph 6 (Figs 12 to 19).
2 186 29.17 850.89 3.36
3 138 – 20.83 433.89 2.73
4 159 0.17 0.03 0.00
5 148 – 10.83 117.29 0.74
6 180 21.17 448.17 2.82
2
Mean in 158.83 c = 10.43
minutes
2
p-value (11.070) > c , so data are reproducible
Table 6D: Average duration of laparoscopic donor nephrectomy
in minutes
Manipulation angles in degree 30 60 90
Mean timing in minutes 151.50 128.50 158
c 2 3.61 3.19 10.43

Fig. 14: ports’ positions

Fig. 12: the working angle at one of the ports’ positions in a
donor nephrectomy

Fig. 13: ports’ positions for left laparoscopic donor nephrectomy Fig. 15: sites of ports’ positions after left donor nephrectomy
World Journal of Laparoscopic Surgery, May-August 2014;7(2):74-87 85