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Postocclusive hyperaemic duplex scan: a new method of aortoiliac assessment
I C Currie1, Y G Wilson, R N Baird
1Vascular Studies Unit, Bristol Royal Infirmary, UK.
The British Journal of Surgery
|September 1, 1995
Summary
A new postocclusive hyperaemic duplex (PHD) test offers a fast, non-invasive screening for aortoiliac disease. This method accurately identifies patients with significant disease, improving early diagnosis and patient management.
Area of Science:
- Vascular Surgery
- Diagnostic Imaging
- Non-invasive testing
Background:
- Aortoiliac duplex scanning is accurate but time-consuming and technically demanding.
- A need exists for a faster, non-invasive screening test for aortoiliac disease.
Purpose of the Study:
- To develop and validate a rapid, non-invasive screening test for aortoiliac disease.
- To assess the efficacy of the postocclusive hyperaemic duplex (PHD) test.
Main Methods:
- Common femoral Doppler ultrasonographic waveforms were recorded after 3 minutes of arterial occlusion in patients with and without aortoiliac disease.
- End diastolic velocity at 70 seconds post-cuff release was analyzed as a discriminant.
- The PHD test was prospectively validated in a separate cohort.
Main Results:
- Patients with significant aortoiliac disease exhibited prolonged postocclusive hyperaemic flow.
- End diastolic velocity at 70 seconds showed high discriminant ability (92% accuracy, 88% sensitivity).
- Prospective validation demonstrated good performance (84% accuracy, 86% sensitivity).
Conclusions:
- The postocclusive hyperaemic duplex (PHD) test is a simple, non-invasive method for assessing aortoiliac disease.
- The PHD test is more sensitive than femoral pulse palpation and comparable to arteriography.
- This test can be performed during initial outpatient clinic visits, facilitating timely diagnosis.