ESTUDO COMPARATIVO ENTRE DIFERENTES TIPOS DE REVESTIMENTO INTERNO DE ANASTOMOSES ESOFÁGICAS EM CÃES

The aim of this work was to compare, in a prospective and randomized way, the use of two suture techniques: one using a PENROSE drain as an internal lining and the other using submucosal-mucosal invagination in the esophagus-esophagical cervical anastomosis. Thirty-two male dogs with an average weight between 8 and 10 Kg were distributed in two groups of 16 animals. Each group was divided into 2 subgroups based on post-operative time periods: 7 and 14 days. In each group, the morbidity and macroscopic and microscopic alterations caused by anastomosis were evaluated. No fistula and no death were observed in the pos-operative period. All animals from PENROSE drain as an internal lining group presented dysphagia by at least 7 days, while 4 animals presented transitory dysphagia for only 2 days in the invagination suture group. Optical microscopic analysis revealed deficiency of regeneration in the submucous and mucous tunics in the anastomosis with prosthesis. The results permitted to conclude that the esophagus-esophageal cervical anastomosis using a PENROSE drain as an internal lining is less efficient that executed by submucosal-mucosal invagination.