Posterior urethral valves (PUV) are obstructive membranes that develop in the urethra (tube that drains urine from the bladder), close to the bladder. The valve can obstruct or block the outflow of urine through the urethra. When this occurs, the bladder, ureters and kidneys become progressively dilated, which can lead to damage.

Voiding cystourethrogram (VCUG) is the standard test that helps doctors make a definitive diagnosis of PUV. VCUG is a minimally invasive test that uses X-ray technology to view the urinary tract and bladder.

This group of PUV is easy to be diagnosed by typical findings in voiding cystourethrography (VCUG) and endoscopy for confirming valve like structure in the posterior urethra. In contrast, there is another group of PUV which is elusive and overlooked easily in VCUG even if it contributes to VUR or detrusor overactivity.

2025年2月1日 · This study aimed to automate and increase accuracy of PUV detection in voiding cystourethrography (VCUG) images using an AI-based pipeline. The main objective was to detect presence of PUV based on urethral ratio calculated automatically from segmented urethra region.

2016年12月1日 · Whenever the posterior urethra is more than 2.2 times the diameter of the anterior urethra (PAR >2.2) on repeat VCUG following a PUV ablation, a cystoscopy check is essential to rule out residual PUV/stricture.

2024年11月27日 · Voiding cystourethrogram (VCUG) is the best imaging technique for the diagnosis of posterior urethral valves. The diagnosis is best made during the micturition phase in lateral or oblique views, such that the posterior urethra can be imaged adequately 1,4.

对于无明显排尿困难或者节段性排尿，而表现为反复尿路感染或慢性附睾炎的患儿，建议通过排尿期膀胱尿道造影 (voiding cystourethrography，VCUG)和 (或)膀胱镜检查以明确或排除PUV。

Posterior urethral valves (PUV) are a congenital condition where abnormal tissue growth in the urethra causes urinary obstruction, leading to symptoms like difficulty urinating, urinary tract infections, and kidney damage.

Posterior urethral valves (PUV) are remnants of embryonic development in the prostatic or membranous urethra causing congenital lower urinary tract obstruction (CLUTO). PUV may cause significant long-term dysfunction of the lower and upper urinary tract. Posterior urethral valves are classified by Young [fig. Classification of PUV]:

2024年5月6日 · Posterior urethral valves are a rare congenital disorder affecting the male urinary tract, characterized by abnormal membranous folds in the posterior urethra. This condition can lead to urinary tract obstruction, resulting in a spectrum of clinical manifestations ranging from delayed voiding to severe urinary retention.