Bladder Outlet Obstruction: Imaging Approach
Bladder outlet obstruction (BOO) is a common clinical problem in older men and can be caused by benign prostatic enlargement, urethral stricture, or other lower urinary tract conditions. Ultrasound is often the first-line imaging tool used to assess the bladder, prostate, and post-void urinary retention.
Why Imaging Matters
Ultrasound helps identify whether the bladder is failing to empty normally, whether the prostate is enlarged, and whether there is evidence of chronic urinary retention. It is especially useful when symptoms are unclear or when clinicians need a rapid bedside assessment.
Key Ultrasound Findings
- Enlarged prostate gland with increased volume
- Prominent median lobe protrusion into the bladder base
- Thickened bladder wall in chronic obstruction
- Increased post-void residual urine
- Reduced bladder emptying or incomplete emptying during the study
Clinical Relevance
In patients with lower urinary tract symptoms, imaging can support the diagnosis of obstruction and guide further management. When BOO is suspected, ultrasound findings are often correlated with history, physical examination, and urological assessment.