Stability and Safety of Laploop under the Endoscopic Surgery of Rabbits

Chae, Yoon Seok; Choi, Jin Sub; Park, Ayoung Nyun; Kim, Kyung Sik; Lee, Woo Jung; Kim, Byong Ro

Abstract

BACKGROUND/AIMS: Along with the expansion of the field of laparoscopic surgery, many laparoscopic instruments have been developed and these all together made laparoscopic surgery possible in many operative procedures which used to be considered impossible to be done using a laparoscope. Suturing is a technique quite often required during laparoscopic surgery and so far we have used imported suture material. In this article, we have compared the safety and harmfulness of suture material developed domestically in Korea with those imported using house rabbits.
METHODS
A total of 40 white house rabbits from New Zealand weighing 3.0-3.4 Kg were used from July 1, 2000 until April 30, 2001. Under general anesthesia, we created a pneumoperitoneum using a veress needle with a pressure of 10 mmHg followed by insertion of a 5mm laparoscope right above the umbilicus and two 5mm trocars were inserted in the right and left midclavicular lines 5cm below the costal margin. After perforating the pylorus of the stomach using laparoscopic scissors, we sutured two sites using Laploop and then perforated the body of the stomach and again sutured two sites but this time using Vicryl #3-0 for comparison with Laploop. 10 house rabbits were sacrificed each on post operation days 10, 20, 30 and 40 and tissues obtained from those house rabbits were compared using the Sewell method.
RESULTS
Suturing and ties were done without any problems and there were no postoperative complications or deaths. On postoperation days 10 and 20, Laploop showed a moderate degree of tissue reaction proved by a Sewell score of 57 and 48 respectively and on postoperation days 30 and 40, a mild to moderate degree of tissue reaction occurred with a S score of 36 and 33 respectively. In models using Vicryl, the S scores were 67 an 62 on postoperation days 10 and 20 respectively showing a moderate degree of tissue reaction and on postoperation days 30 and 40, it showed a mild to moderate degree of tissue reaction with a S score of 52 and 44 respectively which is similar to the results obtained by Laploop.
CONCLUSION
Imported Vicryl and Laploop were both applicable in terms of biologic compatibility but Laploop was easier to apply, more cost effective compared to Vicryl but most of all, there were no complications such as a loosening of a knot or a knot being undone. Therefore it could be concluded that Laploop shows a promising future as a suture material in laparoscopic surgery.