Failure to attain stretched penile length after intracavernosal injection of a vasodilator agent is predictive of XXXX on penile duplex Doppler ultrasonography.

@entity1 @entity323 @entity2003 @entity5015 @entity5501
Penile duplex Doppler ultrasound (PDDU) assesses the etiology of @entity323 . Peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI) are common PDDU parameters. We assessed whether stretched penile length (SPL) in the flaccid state and measured penile length at peak erection after intracavernosal injection (ICI) of a vasodilator during PDDU correlated with the etiology of @entity323 . We performed a retrospective review of 93 @entity1 who underwent PDDU for @entity323 . Normal and stretched penile length were measured, both at a flaccid state prior to ICI and at peak erection during PDDU. Collected data included @entity1 demographics, vascular, and anatomic parameters. The mean age was 52  years. SPL was equivalent to peak penile length after ICI in 60 @entity1 (65%, group 1) and did not match in 33 (35%, group 2). There were no significant differences between the two groups in terms of flaccid, stretched, and post-ICI erect penile lengths, IIEF score, PSV, percent @entity2003 or tumescence, and vasodilator dose used. @entity1 in group 2 had less of a change in penile length from flaccid to erect state (36% vs. 44%, p  =  0.02), higher EDV (12.0 vs. 8.5, p  =  0.041), lower RI (0.6 vs. 1.0, p  =  0.046), and more @entity5501 (82% vs. 53%, p  =  0.001). On multivariate analysis, failure to reach maximum SPL at peak ICI erection (OR 2.255, CI 1.191-4.271, p  =  0.0126), EDV (OR 1.281, CI 1.115-1.471, p  <  0.001) and RI (OR 0.694, CI 0.573-0.723, p  =  0.009) predicted @entity5501 . Failure to reach maximal SPL during PDDU using ICI with a vasodilator agent predicted @entity5501 , which is independent of both @entity2003 and tumescence. This measurement could serve as another diagnostic tool for predicting @entity5501 when PDDU is not readily available. Limitations include the subjective nature of penile measurements and different @entity5015 doses used.
