Relationship between bladder outlet obstruction and prostatic indentation, prostatic urethral length, and bladder-prostatic urethral angle

Abstract

Objective: To evaluate the relationship between prostatic anatomical factors and pressure flow studies (PFSs). Methods: The study was designed with 41 patients. PFS was applied to every patient. The Qmax value and voided volume during uroflowmetry were recorded. The PdetQmax values during PFS were recorded and obstruction indices were calculated. Prostate volume, prostatic indentation, prostatic urethral length, and bladder-prostatic urethral angle were determined by transrectal ultrasonography. Results: The mean age of the participants was 66.2 years. The mean maximum flow value was detected as 9.91 ± 4.92 ml/s, and the mean average flow value as 4.89 ± 2.54 ml/s. The mean obstruction index of the patients was found to be 75.27 ± 46.96. There was a positive linear relationship between obstruction index and PSA, prostate volume, prostatic urethral length, and prostatic indentation ( r: 0.341, p: 0.029; r: 0.363, p: 0.020; r: 0.386, p: 0.013; and r: 0.479, p: 0.002, respectively). No significant relationship was found between obstruction index and bladder-prostatic urethral angle. Conclusion: Prostatic urethral length and prostatic indentation are associated with the degree of bladder outlet obstruction. Further studies involving a higher number of patients are needed to calculate the accuracy of these parameters.