Korean J Urol.  2001 Aug;42(8):809-814.

The Correlation of Urodynamic Study with Prostate Volume Parameters in the Evaluation of the BPH

• Ko YS
• Lee JG

Abstract

PURPOSE: It is difficult to assess the severity of benign prostatic hyperplasia (BPH) both objectively and quantitatively. This study aims to examine the predictive value of ultrasonic measurements obtained by transrectal ultra-sonography (TRUS) for infravesical obstruction as evaluated by pressure flow study (PFS).
MATERIALS AND METHODS
Among the men over 50 years old with symptoms of BPH, 69 men in which bladder outlet obstruction were confirmed by PFS were prospectively analysed. All men were requested to undergo measurement of international prostate symptom score (IPSS), TRUS and PFS. IPSS and urodynamic parameters were compared to prostate volume parameters using simple and multiple regression analysis.
RESULTS
Simple regression analysis demonstrated that prostate total volume (PV) and presumed circular area ratio (PCAR) correlated significantly with all urodynamic parameters. Maximal uroflow (Qmax) was significantly correlated with all prostate volume parameters. Multiple regression analysis showed that PCAR was the only significant independent determinant of IPSS and urodynamic parameters. A receiver operator characteristics curve analysis showed that 0.8 was the most suitable cutoff value of PCAR for the prediction of infravesical obsruction with a diagnostic accuracy of 75.3%.
CONCLUSIONS
PCAR was an only significant independent determinant of the severity of BPH using a cutoff value 0.8. Conclusively, PCAR was thought to be a valuable volume parameters in predicting bladder outlet obstruction caused by BPH without measuring pressure-flow study.

Keyword

Urodynamic study; Benign prostatic hyperplasia; Prostate volume para

MeSH Terms

Humans
Male
Middle Aged
Prospective Studies
Prostate*
Prostatic Hyperplasia
Ultrasonics
Urinary Bladder Neck Obstruction
Urodynamics*