Page 33 - WJOLS

WJOLS

Is there an Ideal Port Position for Laparoscopic Urological Procedures?

Table 2A: Timing of clipping of renal vessels at 30º Table 2C: Timing for renal vessel ligation with manipulation
manipulation angle angle 900
Observed Observed
timing (O) (O-E) 2 time in 2
(in sec) Expected (E) O-E (O-E) 2 E Sl. seconds Expected time 2 (O-E)
16 16 seconds 0 0 0.00 no. (O) in seconds (E) O-E (O-E) E
15 1 1 0.06 1 32 30.2 1.8 3.24 0.08
22 6 36 2.25 2 37 6.8 46.24 1.53
14 – 2 4 0.25 3 25 – 5.2 27.04 0.90
16 0 0 0.00 4 34 3.8 14.44 0.48
13 – 3 9 0.56 5 29 – 1.2 1.44 0.05
17 1 1 0.06 6 29 – 1.2 1.44 0.05
18 2 4 0.25 7 27 – 3.2 10.24 0.34
19 3 9 0.56 8 18 – 12.2 148.84 4.93
15 – 1 1 0.06 9 33 2.8 7.84 0.26
17 1 1 0.06 10 36 5.8 33.64 1.11
16 0 0 0.00 11 29 1.2 1.44 0.05
14 – 2 4 0.25 12 27 – 3.2 10.24 0.34
15 – 1 1 0.06 13 35 4.8 23.04 0.76
13 – 3 9 0.56 14 28 – 2.2 4.40 0.15
16 0 0 0.00 15 32 1.8 3.24 0.08
14 – 2 4 0.25 16 37 6.8 46.24 1.53
10 – 6 36 2.25 17 25 – 5.2 27.04 0.90
21 5 25 1.56 18 24 – 6.2 38.44 1.27
19 3 9 0.56 19 38 7.8 60.84 2.01
Average time in c = 9.56 20 29 – 1.2 1.44 0.05
2
2
seconds = 16 Average c = 16.85
2
p-value (30.144) > c , so data are reproducible time = 30.2
2
p-value is > c , so data is reproducible
Table 2B: Timing of renal vessels clipping with manipulation all the readings were reproducible at p­value (30.144), 5%
angle of 60º
Observed level of significance: it has clearly demonstrated that the 60º
timing (O) (O-E) 2 angle has shorter operative time followed by 30 and then
(in seconds) Expected (E) O-E (O-E) 2 E 90º, and the angle 60º followed by 30º were more repro­
13 11.1 1.9 3.61 0.33 ducible than 90º. This is shown in Graph 2 (Figs 3 and 4).
11 – 0.1 0.01 0.00
19 7.9 62.41 5.62 Third: Tables 3A to D showed readings of timing taken for
11 – 0.1 0.01 0.00 ureteroureteral anastomosis in the swine at different mani­
2
10 – 1.1 1.21 0.11 pulation angles which were validated by χ test and average
16 4.9 24.01 2.16 obtained (Fig. 5). The average timing in seconds for 30,
9 – 2.1 4.41 0.39
8 – 3.1 9.61 0.87
9 2.1 4.41 0.39
9 – 2.1 4.41 0.39
11 – 0.1 0.01 0.00
12 0.9 0.81 0.07
11 – 0.1 0.01 0.00
12 0.9 0.81 0.07
12 – 0.9 0.81 0.07
11 0.1 0.01 0.00
10 – 1.1 1.21 0.11
10 – 1.1 1.21 0.11
10 – 1.1 1.21 0.11
8 – 3.1 9.61 0.87
2
Average time = c = 11.66
11.1 Fig. 2: tying a knot around a fixed distance to ensure the
2
p-value > c , so data are reproducible manipulation angle is maintained
World Journal of Laparoscopic Surgery, May-August 2014;7(2):74-87 79