Management of medically unresponsive detrusor urethral dyssynergia in three dogs by perineal urethrostomy

Abstract Three male dogs were referred with chronic dysuria. A presumptive diagnosis of idiopathic detrusor urethral dyssynergia was made based on a characteristic pattern of urination (a ‘spurting’ interrupted urine stream, dribbling urine following failed attempts at urination), normal clinical and neurological examination, absence of physical obstruction on urethral catheterisation and absence of abnormalities on plain and contrast radiography and ultrasonography. Medical management failed to resolve clinical signs, and all dogs therefore underwent perineal urethrostomy as a salvage procedure. There were no major postoperative complications, and all dogs urinated with a normal uninterrupted stream of urine at their first urination postoperatively. Urinary function was assessed before and after perineal urethrostomy by observation of urination and estimation of residual bladder volume using ultrasound. No recurrence of dysuria was reported during long‐term follow‐up, with urination reported to be normal in all cases.