EVALUATION OF PENILE ULTRASONIC VELOCITOMETRY VERSUS PENILE DUPLEX ULTRASONOGRAPHY TO ASSESS PENILE ARTERIAL HEMODYNAMICS

Objectives. A prospective study was performed comparing duplex ultraso nography (DU) and ultrasonic velocitometry (UV), using a new fixed-ang le device, in assessing penile arterial hemodynamics. Cavernous arteri al peak systolic and end-diastolic flow velocities were measured. Meth ods. Twenty-four consecutive patients (mean age 47 years) underwent DU (Ultramark 9 HDI System) and UV (Knoll/MIDUS system) at the same sett ing by the same technician. After preinjection scanning, all patients received 60 mg of papaverine intracavernosally. Repeat scanning was pe rformed at 5, 10, 15, and 20 minutes. Results. The statistical signifi cance between the two techniques was assessed by examining the correla tion. For all patients (n = 24) and all velocity determinations in all patients (n = 554), the equation for the linear regression line is y = 0.952x + 1.453, r = 0.91 (r(2) = 0.82) and P<0.05. Conclusions. UV i s as accurate as DU in measuring peak flow velocities of the cavernous artery. This new fixed-angle device is capable of identifying a vesse l without real time imaging. UV is a safe, office-based procedure and scanning is less operator-dependent and easier to learn. (C) 1998, Els evier Science Inc. All rights reserved.