Neouretra com enxerto autólogo de segmento intestinal em felino

Abstract

FARIA, B. G. O. Neouretra with autologous graft intestinal segment in a cat. 2020. 54p. Thesis (Doctor in Animal Science on Tropics) – School of Veterinary Medicine and Zootechny – Federal University of Bahia, 2020. Urethrostomy in cats is indicated in cases of severe urethral damage or recurrent obstructions, to ensure the return and maintenance of urinary flow. However, some cases may require urethral reconstruction with tissues from other regions. The autogenous graft of vascularized intestinal segment is widely used in medicine to provide functional urethral restoration, but in veterinary medicine, its use is still limited. Therefore, the present study aimed to evaluate the feasibility and applicability of the autogenous graft of vascularized intestinal segment in functional urethral repair of 14 cats with stenosis or urethral rupture caused by complication of previous treatment. Eight cats were presented with urethral stenosis and six with urethral rupture. A segment of approximately seven centimeters from the final portion of the ileum, with preservation of its irrigation and mesenteric innervation, and subsequent end-to-end anastomosis of remained intestines was used. In 12 animals, the pre-prostatic urethra was sectioned and in two animals section occurred in the urinary bladder neck. Anastomoses of the urethra or the urinary bladder neck to the aboral end of the graft was performed. Thereafter an ostomy was performed with the oral end in the prepubic region. Transoperative maneuvers for obtaining and applying the graft proved to be feasible and suitable for maintaining the tissue vitality of the grafted segment and restoring the immediate urinary flow. Postoperative clinical and ultrasonographic evaluations were performed for a minimum period of one year, which proved the effectiveness of the grafting technique and the normality of the urinary flow, with no signs of rejection and minimal complications. Thus, the autogenous graft of vascularized intestinal segment behaves as a good urethral substitute and has significant therapeutic value for cases of urethral reconstruction, particularly when other surgical techniques are not feasible.