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Ophthalmic artery aneurysms: an investigation by duplex scan
L J Molnár1, J G Caldas, V P Costa
1Heart Institute, University of São Paulo, Medical School, Brazil.
Ultrasound in Medicine & Biology
|January 1, 1997
Summary
Duplex scanning can identify ophthalmic artery aneurysms by detecting reduced peak systolic velocity (PSV) in affected vessels. A PSV below 19 cm/s accurately diagnoses these aneurysms when carotid stenosis is absent.
Area of Science:
- Vascular Surgery
- Diagnostic Imaging
- Neuroendovascular
Background:
- Ophthalmic artery aneurysms are rare but serious vascular conditions.
- Accurate diagnosis is crucial for timely intervention and preventing complications.
- Non-invasive imaging modalities are sought to supplement traditional angiography.
Purpose of the Study:
- To evaluate the diagnostic utility of duplex scanning for ophthalmic artery aneurysms.
- To analyze postaneurysmal peak systolic velocity (PSV) in ophthalmic arteries.
Main Methods:
- Duplex scanning of 28 carotid-ophthalmic artery segments.
- Exclusion of ipsilateral carotid stenosis.
- Comparison with angiography as the gold standard.
Main Results:
- Ophthalmic artery aneurysms showed significantly reduced mean PSVs (17.95 cm/s) compared to healthy controls (27.95 cm/s).
- A PSV threshold of <19 cm/s demonstrated 80% sensitivity and 100% specificity for aneurysm diagnosis.
- Angiography confirmed findings in a subgroup of 7 subjects with 8 aneurysms.
Conclusions:
- Duplex scanning is a valuable tool for diagnosing ophthalmic artery aneurysms.
- This non-invasive method is effective when severe ipsilateral carotid stenosis is ruled out.
- Reduced PSV is a key indicator for identifying these aneurysms.