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Anatomic variations of cavernous arteries and their effect on measurement of hemodynamic parameters: a power Doppler
Hideo Sakamoto1, Masakazu Nagata, Katsuyuki Saito
1Department of Urology, Showa University School of Medicine, Tokyo, Japan.
Insights
Cavernous arterial (CA) anatomy varies, impacting hemodynamic measurements like peak systolic velocity (PSV). These variations are crucial for interpreting Doppler sonography in erectile dysfunction assessments.
Area of Science:
- Urology
- Radiology
- Vascular Anatomy
Background:
- Erectile dysfunction (ED) can have a vascular component.
- Understanding penile vascular anatomy is key for diagnosing ED.
Purpose of the Study:
- To assess cavernous arterial (CA) anatomy using power Doppler imaging.
- To evaluate how CA anatomic variations affect hemodynamic parameter measurements.
Main Methods:
- Power Doppler imaging used to examine CA anatomy in 33 patients with vasculogenic ED and 26 without.
- Hemodynamic variables, including peak systolic velocity (PSV), measured at multiple sites within the CA.
Main Results:
- CA anatomy variations were observed in both vasculogenic and non-vasculogenic ED groups.
- A single CA was the most common finding, but double, triple, and bifurcated CAs were also noted.
- PSV generally decreased distally in single CAs, but variations occurred, especially in cases of multiple CAs or inter-arterial communication.
Conclusions:
- Cavernous arterial anatomy is notably variable.
- Hemodynamic parameters like PSV differ based on CA anatomy and measurement site.
- Anatomic variations must be considered during Doppler sonography interpretation for ED.
Objectives:
To assess the cavernous arterial (CA) anatomy with power Doppler imaging and evaluate the effects of any anatomic variations on the measurement of hemodynamic parameters.
Methods:
Thirty-three patients with and 26 without a vascular component to their erectile dysfunction were examined. The CA anatomy was evaluated, and hemodynamic variables were measured at multiple sites, including sites in each artery, if multiple CAs were present.
Results:
The frequency of anatomic variation was similar between the two groups. A single CA, considered normal, was observed in 57.7% of 52 corpora in the nonvasculogenic group and in 63.6% of 66 corpora in the vasculogenic group. Seven patients (26.9%) in the nonvasculogenic group and 11 (33.3%) in the vasculogenic group had CA anatomy that was different between the right and left corpora. In both groups, a single CA ordinarily showed at least a 35.0% decrement in the mean peak systolic velocity (PSV) between the crura and the proximal shaft; double, triple, and bifurcated CAs also had distally decreased PSV. However, two corpora with a single CA showed an increased PSV distally; in 1 patient, arterial communication between the corpora was responsible. In 86.7% of corpora with double CAs in the vasculogenic group and in 52.6% in the nonvasculogenic group, the CA distant from the crura showed a greater PSV than that near the crura.
Conclusions:
CA anatomy is variable, and the PSV differs between sites, irrespective of the presence of a vascular component to erectile dysfunction. Thus, anatomic variations should be considered when interpreting Doppler sonography.
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