Abstract
OBJECTIVE: This study aims to determine the importance of non-invasive diagnostic parameters such as intravesical prostatic protrusion (IPP), bladder wall thickness, prostate volume, and uroflow in the detection of bladder outlet obstruction using pressure-flow studies. MATERIALS and METHODS: Pressure flow studies were performed on patients who presented to the outpatient clinic with lower urinary tract symptoms. Patients were divided into two groups, those with and without obstruction, according to the Bladder Outlet Obstruction Index (BOOI) parameter. Differences between the two groups were evaluated in terms of prostate volume, IPP, Bladder Wall Thickness (BWT), uroflow peak flow rate (Qmax), post-void residual urine volume and Bladder Outflow Obstruction Number (BOON) parameters. RESULTS: There was a significant difference in prostate volume, IPP, BWT, uroflow peak flow rate, post-void residual urine volume and BOON parameters between the obstructed and non-obstructed groups. In the ROC analysis performed to predict the obstructed patient, the ideal cut-off value for prostate volume was determined as 71.5 ml, for IPP 10.5 mm, for BWT and 5.3 mm. Bladder outlet obstruction index parameter was positively correlated with prostate volume, IPP, BWT, residual volume and IPSS. There was a negative correlation with Qmax. CONCLUSION: In the ROC curve for predicting obstructed patients, IPP showed a higher AUC (area under the curve) compared to prostate volume and BWT, indicating IPP’s superior predictive value for obstruction. Uroflow parameters are also significant predictors, albeit less so than IPP. Increasing obstruction scores correlate with higher levels of prostate volume, IPP, uroflow peak flow, and IPSS, providing insights into the severity of obstruction. Keywords: bladder outlet obstruction, benign prostate enlargement, non-invasive diagnosis
Published Version
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