Correlation Between Preoperative Parameters of Sonography Videourodynamic Studies and Postoperative Outcomes in BPH Patients

Objective: To investigate the correlation between preoperative parameters of sonography videourodynamic studies (SVUDS), including maximum detrusor pressure (Pmax), bladder contractility index (BCI), prostate volume (PV), and intravesical prostatic protrusion distance (IPP), and postoperative efficacy in patients with benign prostatic hyperplasia (BPH) undergoing transurethral resection of the prostate (TURP), and to evaluate their predictive value for postoperative outcomes. Methods: Retrospective analysis of 74 BPH patients who underwent TURP at Shaoyang Central Hospital and The Second Affiliated Hospital of Guilin Medical University from August 2018 to August 2024. Preoperative Pmax, BCI, PV, IPP, and pre- and postoperative maximum urinary flow rate (Qmax) were collected. Postoperative Qmax improvement (postoperative Qmax − preoperative Qmax) was used to assess efficacy. Patients were divided into a good efficacy group (improvement ≥5.0 ml/s, n=49) and a poor efficacy group (improvement <5.0 ml/s, n=25). Univariate analysis was performed to compare differences between groups, and statistically significant parameters were further analyzed using ROC curves. Results: The median Qmax increased from 6.5 (4.8, 9.2) ml/s (preoperative) to 15.0 (9.6, 20.2) ml/s (postoperative). Univariate analysis showed no significant differences in preoperative Pmax or BCI between groups (P>0.05), while preoperative PV and IPP were significantly lower in the good efficacy group (P<0.05). ROC analysis revealed diagnostic efficacy (AUC) for PV and IPP as 0.656 and 0.682, respectively (P<0.05). Optimal cutoff values were PV >89.0 ml (specificity=0.918, sensitivity=0.440) and IPP >16.50 mm (specificity=0.531, sensitivity=0.760). Conclusion: Prostate volume (PV) and intravesical prostatic protrusion distance (IPP) correlate with postoperative urinary flow rate improvement. PV >89.0 ml demonstrates high specificity, while IPP >16.5 mm shows high sensitivity in predicting poor postoperative Q