The combined intracavernous injection and stimulation test: diagnostic accuracy

Area of Science:

• Urology
• Andrology
• Sexual Medicine

Background:

• Impotence, or erectile dysfunction (ED), is a common condition affecting many men.
• The intracavernous injection and stimulation test is an established functional assessment for ED.
• Accurate diagnosis is crucial for effective treatment planning.

Purpose of the Study:

• To evaluate the impact of adding genital self-stimulation to the standard intracavernous injection test.
• To assess the diagnostic value of this combined approach for venogenic impotence.
• To determine if this modified test can predict the success of therapeutic self-injection programs.

Main Methods:

• A retrospective review of patients undergoing the combined intracavernous injection and stimulation test.
• Vasoactive drug injection followed by a 15-minute assessment of erection quality.
• Patients not achieving full rigidity were instructed to perform 5 minutes of genital self-stimulation.
• Reevaluation of erection quality post-stimulation, with subsequent cavernosometry and cavernosography if indicated.

Main Results:

• Out of 90 patients with initial poor response, 67 (74%) showed improved erection quality with self-stimulation.
• 23 patients (26%) did not improve with stimulation.
• A decrease in erection quality post-stimulation in 25 patients suggested venogenic impotence.
• Cavernosometry/cavernosography revealed moderate to severe venous leakage in 84% of evaluated patients.

Conclusions:

• Genital self-stimulation following diagnostic intracavernous injections can enhance erectile response.
• This technique may improve the diagnostic accuracy for venogenic impotence.
• The combined test shows potential in predicting the efficacy of future therapeutic self-injection regimens for erectile dysfunction.