Volume of residual urine as an indication for surgical treatment of benign prostatic hyperplasia

Objective To study the volume of residual urine as related to the surgical indication for BPH. Methods Urodynamic study was carried out in 103 BPH patients who were assigned to group A(no residual urine), group B( residual urine【 60 ml) and group C( residual urine 60 - 100 ml). Results Qmax, URA, DR and DI were not significantly different between group C and group B (P 】 0.05) but significantly different between group C and A or between B and A(P【0.05). Conclusion The conventional conception that surgical intervention is indicated when the residual urine being 】 60 ml should be strictly followed. Early surgical intervention should be undertaken if the bladder outlet obstruction or bladder function deteriorated by BPH causing residual urine. Other causes such as neurogenic should be ruled out before surgery. 10 refs,2 tabs.

Influence of bladder outlet obstruction and detrusor contractility on residual urine in patients with benign prostatic hyperplasia

Objective To study the relationship between the degree of bladder outlet obstruction (BOO),detrusor contractility and residual urine in patients suffering from benign prostatic hyperplasia (BPH). Methods In 181 patients with BPH,degree of BOO,detrusor contractility,residual urine caculated from cathetering combined with the difference between the filling and the voiding were recorded and analysized statistically using urodynamic technique.Results Residual urine increased when the detusor contractility was weakened ( F =12.134, P =0.001). In patients wih severe BOO,there was no significant difference in residual urine ( F =2.386,P =0.071). Conclusions Increased residual urine is mainly resulted from decreased detrusor contractility. BOO has no significant influence on residual urine. Some patients with normal or weakened detrusor contractility may have more residual urine.

Age-related changes for the predictors of benign prostatic hyperplasia in Chinese men aged 40 years or older

A cross-sectional study was conducted to estimate the age-stratified normal levels and age-related changes in the risk predictors of benign prostatic hyperplasia(BPH)progression.A total of 4706 male participants aged 40 years or older in Zhengzhou(China)were enrolled.The values of the International Prostate Symptom Score(IPSS),prostate-specific antigen(PSA),prostate volume(PV),and postvoid residual urine volume(PVR)significantly increased with age.Nonlinear relationships between age and IPSS scores≥8(P for nonlinearity=0.046),PSA level≥1.6 ng ml^(-1),PV≥31 ml,or PVR≥39 ml(all P for nonlinearity<0.001)were observed.After the age of 61 years,the risk indicators related to BPH progression were positively correlated with age(odds ratio[OR]>1),regardless of the predictors of the IPSS score,PSA level,PV,or PVR;and the OR values increased gradually.Therefore,after the age of 61 years,the risk predictors related to BPH progression were positively correlated with age.