R. A. Pereira

Avaliação de dois diferentes fios de sutura para colopexia incisional laparoscopia em cães: estudo experimental

Abstract Aiming to describe the laparoscopic technique for dog colopexy and tocompare two suture materials 10 mongrel dogs separated in two groupsof five (GV e GP). In the GV group the colopexy was realized with apolyglactin 910 3-0, and in the GP group a polypropylene 3-0 wasused. For both procedures the dogs were positioned in dorsalrecumbence and submitted to a pneumoperitoneum with CO 2 usingpressure of 12mmHg. Four trocars (two of 5mm and two of 10mm)were introduced in the left and right position of umbilical region. Thedescendent colon was grasped with a Babcock forceps and submittedto a seromuscular incision of 2.5 cm in the antimesenteric surface. Asimilar lesion was preceded in the transverse abdominal muscle, parallelwith the ventral midline. The incisioned margins of colon andtransverse abdominal muscle were sutured in two lines of simplecontinuous pattern. Fourteen days after the surgeries the dogs weresubmitted to laparoscopy surgery for evaluations of the peritonealcavity and of the adherences occurred and to biopsies collections. Thecolopexy permanence was found in all dogs and the omentum fixationin the suture region was observed in 60% of GV dogs and 100% ofGP dogs. Both suture materials were reported adequate for the colopexyprocedure, however the polyglactin 910 suture was more easily realizeddue to its lower memory. In the histological analysis were observedthat the connective tissue deposition was similar in both groups andin all 10 dogs the collagen fibers presented mature aspect. Based on theresults presented herein, the proposed laparoscopic technique inadequate for colopexy procedure in dogs.

Colopexia laparoscópica com retalho de tela de polipropileno em cães

A new laparoscopic colopexy technique was tested in dogs without intracorporeal sutures. The use of polypropylene mesh in eleven mongrel dogs was evaluated. The serosal surface of the descendent colon and transverse abdominal muscle were put in contact with the mesh application, taking into consideration that the polypropylene implant was positioned through the mesocolon and under the muscle flap. Finally, the extremities of the mesh were clipped. The procedures lasted 36:00±13:15min, without any kind of complications. In the post-operative period, adequate colopexy in seven dogs was observed. In three dogs the colopexy was partial and in one the bowel did not adhere to the muscles or mesh. The proposed procedure is viable for dogs, however, it is necessary to make some adjustments.

Resistência à tração de colopexias incisionais realizadas por cirurgia laparoscópica ou celiotomia em cães

In the present study the traction resistance and histological features of incisional colopexys made by open or laparoscopic surgery were evaluated. For this purpose, 15 mongrel dogs were located in two groups. In the GL group (n= 8) the colopexy adhesion was made by a laparoscopic surgery, and in GA group (n= 7) by a celiotomy. For the laparoscopic procedures the dogs were positioned in dorsal decubitus and four trocars were introduced in the left and right position of umbilical region. The incisions produced in descendent colon and in the abdominal wall were sutured in two layers of intracorporeal suturing. In the GA group the colon suture was similar to the realized in GL group. Fourteen days after the surgeries the dogs were killed to collect samples of abdominal wall and colon descendent, which were used in resistance tests and in histological evaluations. The total surgery time and colon fixation time were higher in the GL group (p 0.05), and the rupture force in GL segments was 43.68±16.45N and in GA was 39.70±15.15N. No differences were found in histological examination between GL and GA groups, and in all dogs the fibers of collagen were mature. The results verified for the laparoscopic technique of colopexy, that presented surgical adhesions with similar quality of the provoked by a conventional technique, allow concluding that the laparoscopic procedure may be utilized as an alternative for rectal prolapse treatment in dogs.

Comparação entre a colopexia laparoscópica com pericárdio bovino conservado em glicerina em cães com a técnica incisional por celiotomia

The laparoscopic colopexy with bovine pericardium preserved in glycerol was compared to incisional approach by celiotomy. Twenty mongrel dogs were used after being separated in two groups. In the laparoscopic surgery, two incisions were made on the transverse abdominal muscles, and the implant was positioned through the muscle flap, involving the bowel. Finally, the extremities of the mesh were clipped. Twenty-eight days after this surgery, the experimental animals were submitted to a new laparoscopic surgery, now aiming at observing the results of both techniques. All patients of the celiotomy group maintained the colopexy. However, none of the animals submitted to the laparoscopic surgery maintained the bowel fixation. The proposed technique is not indicated to promote colopexy in dogs.