[Quantification of bladder-outlet obstruction in males: standard method vc VBN method].

Area of Science:

• Urology
• Medical Diagnostics
• Physiology

Context:

• Benign prostatic hyperplasia (BPH) commonly causes bladder outlet obstruction in men.
• Accurate assessment of obstruction is crucial for effective BPH management.
• Standard methods for evaluating bladder outlet obstruction have limitations in reliability and sensitivity to testing variations.

Purpose:

• To compare the diagnostic accuracy and reliability of the standard method (e.g., Abrams-Griffiths number) versus the VBN method for assessing bladder outlet obstruction in BPH patients.
• To evaluate the correlation between parameters derived from both methods.
• To investigate the test-retest and inter-rater reliability of the VBN parameters.

Summary:

• The VBN obstruction parameter strongly correlates with the standard Abrams-Griffiths (A-G) number (R=0.992).
• A modified standard parameter (mPIP) correlates well with the VBN detrusor contraction-strength parameter (R=0.962).
• VBN analysis identifies detrusor contraction fading as a source of variability in pressure-flow studies, leading to superior test-retest and inter-rater reliability compared to standard parameters.

Impact:

• The VBN method provides more robust and reproducible parameters for evaluating bladder outlet obstruction in BPH.
• VBN parameters are less influenced by testing circumstances, improving clinical applicability.
• This study suggests VBN as a potentially more reliable tool for diagnosing and managing BPH-related lower urinary tract symptoms.