Page 35 - WJOLS

WJOLS

Is there an Ideal Port Position for Laparoscopic Urological Procedures?

60 and 90º were 381.65, 306.60 and 460.45 respectively. then the 30º and also demonstrated that the more difficult, a
Only readings at 30 and 60º were reproducible at p­value laparoscopic task, is more likely it become nonreproducible
2
(30.144), 5% level of significance; but the χ of readings at an angle of 90º and above, probably due to fatique from
at 90 was less than p­value, indicating nonreproducibility. high elevation angle and shoulder over stretching due to
41
These suggest that the 60º angle has shorter operative time poor ergonomics. This is shown in Graph 3.
Table 3C: Timing for ureteroureteral anastomosis at
manipulation angle 90º
Observed time Expected (O-E) 2
Sl. no. in sec. (O) time (E) O-E (O-E) 2 E
1 445 460.45 15.45 238.70 0.52
2 470 9.55 91.20 020
3 468 7.85 57.00 0.13
4 492 31.55 995.41 2.16
5 415 – 45.45 2065.70 4.49
6 462 1.55 2.40 0.01
7 447 – 13.55 180.90 0.39
8 480 19.55 382.20 0.83
9 479 18.55 344.10 0.75
10 412 48.55 2347.40 5.10
11 482 21.55 464.40 1.01
12 499 38.55 1486.10 3.23
13 433 27.55 753.50 1.64 Fig. 6: Arrangement of port’s positions for tasks in the pelvis
14 483 22.55 508.50 1.10
15 490 29.55 873.20 1.90
16 495 34.55 1197.70 2.59
17 432 – 28.45 809.40 1.76
18 453 – 7.45 55.50 0.12
19 469 8.55 73.10 0.16
20 413 – 47.45 2251.50 4.89
2
Average time = c =
460.45 32.95
2
p-value (30.144) < c , so data are not reproducible
Table 3D: Average timing for ureteroureteral anastomosis
Manipulation angles 30 60 90
in degree
Mean timing in 381.65 306.60 460.45
seconds
c 2 25.66 2.43 32.95 Fig. 7: A picture of ring transfer in the pelvis at 60°
manipulation angle

Fig. 5: the approximate manipulation angle while knotting in the
upper tract in a swine Graph 3: Average timing of ureteroureteral anastomosis
World Journal of Laparoscopic Surgery, May-August 2014;7(2):74-87 81