NOTE Surgery Use of an Aortic Stent Graft Extension for the Treatment of Urethral Stricture in a Dog

ABSTRACT. A 2-year-old male mixed dog was referred to us for further evaluation and treatment of a 4-week-history of oliguria and abdominal distension after a surgical repair of urethral injury. To relieve the urethral stricture, we placed a self-expanding aortic stent graft extension with a partial coverage with an expanded polytetrafluoroethylene (ePTFE). After the placement of the stent, the dog presented with a normal urinary voiding, despite the presence of urinary incontinence. The current case indicates that the ePTFE-covered, self-expanding ASGE is an effective intervention for the treatment of severe urethral stricture in the dog. KEY WORDS: canine, expanded polytetrafluoroethylene (ePTTE), self-expanding aortic stent graft extension, urethral stricture. doi: 10.1292/jvms.13-0146; J. Vet. Med. Sci. 75(10): 1363–1365, 2013 A urethral stricture is a narrowing of the urethra caused by neoplasia, urethroliths and trauma due to surgical injury or fracture [7]. The clinical signs include stranguria, overflow incontinence and secondary detrusor atony [8]. Diagnosis is performed with a retrograde urethrography or a urethros-copy. Surgery has commonly been used depending on the location of the stricture. To date, however, both surgical and non-surgical treatment modalities have been reported to trea