Related Experiment Videos
The resistance index represents the corporeal pressure and not the cavernous wall resistance
1Department of Urology and Internal Medicine, City Hospital De Bijloke, Ghent, Belgium.
Purpose:
We compare the results of the resistance index generated by duplex scanning and the corporeal pressure generated by the intracavernous injection test followed by gravity cavernosometry.
Materials And Methods:
We examined 40 impotent subjects with duplex scanning and gravity cavernosometry.
Results:
For the entire group a significant correlation (r = 0.77, p < 0.001) was found between the resistance index and intracavernous injection test, and between the resistance index and the gravity cavernosometry (r = 0.62, p < 0.01). Excluding the results of patients who had a full erection during scanning, the correlation between the resistance index and intracavernous injection test remained but the correlation between the resistance index and gravity cavernosometry disappeared (r = -0.02, p > 0.05).
Conclusions:
There was no relationship between the value of the resistance index and the cavernous wall resistance, except in patients capable of developing a full erection after vasodilator injection.