Comparative Evaluation of resistance among extracorporeal Roeder, Meltzer and Hemolock knots in intestine of sheep

Despite advances in different techniques of suturing and their alternatives, controversies exist in their indications in laparoscopic surgeries. Because tying knots are difficult in laparoscopy other techniques like hemoclips are introduced. The objective of this study was to compare resistance between extracorporeal Meltzer and Roeder knot and hemolock in laparoscopic surgery. In this quasiexperimental study 205 intestines of sheep (20 cm length) sutured with Meltzer's (43 cases, 20%), Roeder's (44 cases, 20.5%) methods and hemolock (128 cases, 59.5%); resistance of these methods evaluated with sphygmomanometer. Also side effects of sutures were evaluated. Data gathered and analyzed accordingly. P value less than 0.05 assumed significant. Mean pressure tolerance of Roeder's knot method was 196.0±50.9 mmHg and in Meltzer knot was 193.8±49.22 mmHg and 247.03±42.47 mmHg in hemolock clips. Mean pressure tolerance was higher significantly in hemolock (p<0.001). Frequency of suture disploacement was 52%(22 cases) in Roeder, 68% in Meltzer (23 cases), and 47% (37 cases) in hemolock. (p<0.001). With respect to the results of this study and easy use of hemolock and due to its high pressure resistance hemolock is a safe and good substitute for extracorporeal knots in laparoscopic surgeries.