title: Evaluation of the resistive index of prostatic blood flow in benign prostatic hyperplasia.
abstract: OBJECTIVE
  The aim of this work is to study the resistive index (RI) of prostatic blood flow by transrectal power Doppler sonography in benign prostatic hyperplasia (BPH) to determine its correlation with other parameters of BPH.
  
  
  METHODS
  Eighty-two male patients aged 52-86 years with lower urinary tract symptoms (LUTS) due to BPH were included in the study. Patients with prostate cancer, neurogenic bladder, or with other pathology (e.g. prostatitis, bladder stone) were excluded from the study. All patients were evaluated by full history including Internatinoal Prostate Symptoms Score (IPSS), general and local examination (DRE), neurologic examination, uroflowmetry, laboratory investigations including urine analysis, routine laboratory tests and serum prostate specific antigen (PSA). Transrectal ultrasonography was used to calculate the total prostatic volume. Transrectal Power Doppler Ultrasound (PUD) was used to identify the capsular and urethral arteries of the prostate and to measures the RI value.
  
  
  RESULTS
  The mean prostate volume was 75.1 ± 44.7 g. The mean RI of the right and left capsular arteries were 0.76 ± 0.06 and 0.76 ± 0.07, respectively. The mean RI of the urethral arteries was 0.76 ± 0.08. There was a high significative correlation between the increase of the RI of the right and left capsular and urethral arteries and the degree of obstruction (P value < 0.001), severity of symptoms (P value < 0.001) and also the prostatic volume (P value < 0.001).
  
  
  CONCLUSIONS
  Resistive index of the prostatic blood flow can be applied as an easy and non-invasive tool to evaluate the lower urinary tract obstruction due to BPH.
authors.affiliation: Urology Department, Benha Faculty of Medicine, Benha, Egypt.
authors.forename: Osama
authors.initials: O
authors.lastname: Abdelwahab
authors.forename: Ehab
authors.initials: E
authors.lastname: El-Barky
authors.forename: Mostafa Mahmoud
authors.initials: MM
authors.lastname: Khalil
authors.forename: Ahmad
authors.initials: A
authors.lastname: Kamar
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D008875:Middle Aged; D011467:Prostate / Q000098:blood supply* / Q000000981:diagnostic imaging; D011470:Prostatic Hyperplasia / Q000000981:diagnostic imaging / Q000503:physiopathology*; D012039:Regional Blood Flow / Q000502:physiology; D018615:Ultrasonography, Doppler, Color / Q000379:methods; D014521:Urethra / Q000098:blood supply* / Q000000981:diagnostic imaging; D001748:Urinary Bladder Neck Obstruction / Q000209:etiology; D014655:Vascular Resistance