Korean J Urol.  2002 Nov;43(11):956-959.

Utility of the Resistive Index Measured by Color Doppler Ultrasonography in Benign Prostatic Hyperplasia

• Chung JH
• Lee DH
• Shim BS

Abstract

PURPOSE: To evaluate the specific findings of color Doppler ultrasonography in patient with benign prostatic hyperplasia (BPH).
MATERIALS AND METHODS
We examined the resistive index (RI) of 110 patients with BPH, and compared them with 100 controls with no symptom, using color Doppler ultrasonography. The RI was compared with the prostatic volume and maximum flow rate (Qmax). In 20 patients with BPH, the RI was measured following surgical treatment.
RESULTS
The RI was significantly higher in the patients than the controls (p<0.001). The BPH patients (n=110) had a mean RI of 0.74, whereas the controls (n=100) had a mean RI of 0.60. There was a significant correlation between RI and Qmax (r=-0.731, p<0.01), and the RI correlated significantly with the prostatic volume (r=0.739, p<0.01). In the 20 BPH patients having undergone TURP, the elevated RI decreased significantly to the normal control levels, from 0.70 to 0.60 (p<0.001), following surgical treatment.
CONCLUSIONS
The Doppler RI might be useful as a new parameter in BPH. However, further studies, on its value in representing urodynamic information, will be required.

Keyword

Benign prostatic hyperplasia; Color Doppler ultrasonography; Resistive index

MeSH Terms

Humans
Prostatic Hyperplasia*
Transurethral Resection of Prostate
Ultrasonography, Doppler, Color*
Urodynamics