Megaurether is a generic term indicating the presence of an enlarged urether with or without concomitant dilatation of the upper collecting system. In men, megaurether may be primary or secondary, refluxing or non refluxing, obstructed or non obstructed, and non refluxing non obstructive. In veterinary medicine, bibliography about this topic is poor, and only ectopia, atresia and uretherorrhexis are recognized as developmental abnormalities of the urether in the horse. Only ectopia and atresia may be associated with megaurether Uretheral developmental and functional abnormalities may cause post-renal hyperazotemia, secondary bacterial infections and chronic renal failure. The aim of the present paper was to describe a case-report of bilateral hydrourether and obstruction of intra-mural tract of the right urether in a 10-days-old Standardbred colt. At first exam colt was depressed, unable to maintain breastbone position; physical exam was normal, except for a suspected increase in peritoneal fluid, diagnosed later by an ultrasound exam. A peritoneal fluid sample was collected; creatinine (4,1 mg/dl) and BUN (110 mg/dl) concentrations were similar to plasmatic levels. Ultrasound exam of urinary tract revealed hyperechogenity of kidney cortex, bilateral pielectasia (worst in right kidney) and bilateral hydrourether Right urether was aperistaltic, winding, with thick parietal wall and it was impossible to find uretheral-bladder junction. Left urether was almost normal. Blood chemistry showed an increased BUN (121 mg/dl) and creatinine (10,3 mg/dl) concentrations. After 48h of therapy, plasmatic creatinine and BUN concentrations were still increased (7,5 mg/dl and 100 mg/dl, respectively). The colt was taken into surgery Right urether was megalic throw out its length, except for its junction with the bladder. After cystostomy, a retrograde 2 mm catheter was passed into right and left urethers; the left urether was open, the right was closed and it was opened with slightly forced movements of the catheter. Ten days after surgery, ultrasound exam revealed reduced pelvis and urethers. Colt left hospital 15 days after surgery with a 3 month antibiotic therapy to avoid secondary bacterial infections of the urinary tract. Normal plasmatic BUN and creatinine concentrations were reached after seven months.
|Autori:||Sgorbini M; Vannozzi J; Citi S; Spinabella S; Corazza M|
|Titolo:||Bilateral megaurether and right uretheral obstruction in a 10-days-old standardbred colt|
|Anno del prodotto:||2007|
|Appare nelle tipologie:||1.1 Articolo in rivista|