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The correlation among cavernous pressure, penile rigidity and resistance index
1Department of Urology, City Hospital De Bijloke, Ghent, Belgium.
The Journal of Urology
|June 17, 1998
Summary
The penile resistance index from duplex scanning accurately reflects intracavernous pressure and erection rigidity. This non-invasive method is as effective as clinical assessment for screening penile vascular issues.
Area of Science:
- Urology
- Medical Imaging
- Physiology
Background:
- Penile duplex scanning is a key diagnostic tool.
- Understanding the resistance index (RI) is crucial for interpreting results.
- Erectile function assessment often involves multiple parameters.
Purpose of the Study:
- To precisely define the diagnostic significance of the resistance index (RI) from penile duplex scanning.
- To establish the relationship between RI, intracavernous pressure, and penile rigidity.
Main Methods:
- Eighty patients underwent clinical evaluation of penile rigidity.
- Penile duplex scans were performed post-injection of prostaglandin E1 (10 microg).
- Intracavernous equilibrium pressure was measured in 34 patients.
Main Results:
- A highly significant linear correlation was found between cavernous pressure, RI, and penile rigidity (p <0.001).
- The RI demonstrated a strong association with objective measures of erectile function.
Conclusions:
- The penile resistance index and clinical assessment of rigidity are both indicators of intracavernous pressure.
- Duplex scanning's RI is a valuable, non-invasive tool for screening for veno-occlusive dysfunction.
- Clinical observation of erection is diagnostically equivalent to RI in identifying potential cavernous leakage.