The goal of treatment is to relieve the obstruction and prevent urinary tract infections and renal compromise. This can be done by either catheterization or surgical intervention depending on the etiology of the obstruction 2. If within normal limits indwelling catheter with flip flow valve (if appropriate). Urinary retention is noted with increased post-void residual on sonographic or voiding studies. Normal post-void residual (PVR) urine volume is <50 mL in patients, but <100 mL can be considered normal in patients older than 65 (Kelly 2004). On radiographic evaluation, the bladder wall appears thickened and trabeculated. Obstruction can be caused by multiple etiologies but is most often seen from urethral strictures, mass lesions within the periurethral region, prostate enlargement, and congenital urethral valves 1. ![]()
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