Correlations between the parameters of prostate volume measured by TRUS and bladder outlet obstruction

doi:10.3969/j.issn.1674-3806.2015.07.06

Abstract：Objective To investigate the correlations between the parameters of prostate volume and the u-rine dynamics test results in patients with benign prostatic hyperplasia (BPH) using transrectal ultrasound(TRUS), and to evaluate the value of these parameters on the diagnosis of bladder outlet obstruction .Methods The clinical data were retrospectively analyzed in 57 patients with BPH.The left/right diameter R1, the up/down diameter R2, the front/back diameter R3 and prostate transition zone volume ( TZV) of the prostate were measured by rectum pros-tatic color ultrasound.The test of parallel urine flow dynamic was performed and the AG value was calculated .Ac-cording to the values of AG, the patients were divided into group A (AG>40),group B(20≤AG≤40), and group C (AG<20).Pearson correlation analysis and single factor variance analysis were used to study the correlations be -tween the parameters of prostate volume and AG values .Results The correlation coefficient between R 2 and AG was 0.822 , P<0.05;The correlation coefficient between TZV and AG was 0.831 , P<0.05 .The degree of bladder out-let obstruction was positively correlated with R 2 and TZV, but had no correlation with R1 and R3;According to AG values, comparisons of F values among the three groups in R 2 and TZV were 33.766 and 33.048 respectively, P<0.05 .There were no significant differences in R 1 and R3 among the three groups .Conclusion There is a positive correlation between prostate up/down diameter R2, prostate transition zone volume TZV and bladder outlet obstruction degree, which can be used as diagnosis indicator for urinary tract obstruction caused by prostatic hyperplasia .