Premium
RAPID DOPPLER SCREENING TEST FOR INTERNAL CAROTID DISEASE
Author(s) -
Seneviratne B.I.B.,
Hughes A.,
Jayasinghe L. S.,
Hewson D. J.
Publication year - 1986
Publication title -
australian and new zealand journal of medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.596
H-Index - 70
eISSN - 1445-5994
pISSN - 0004-8291
DOI - 10.1111/j.1445-5994.1986.tb02015.x
Subject(s) - medicine , carotid bifurcation , stenosis , radiology , occlusion , stroke (engine) , predictive value , biplane , doppler effect , angiography , doppler ultrasound , cardiology , mechanical engineering , physics , astronomy , engineering , aerospace engineering
There is increasing evidence that only hemodynamically significant internal carotid lesions (of more than 50% diameter stenosis or occlusion) rather than minor lesions are the precursors of stroke. A Doppler test combining periorbital and direct audible interpretation of internal carotid Doppler signals was performed on 67 patients (134 internal carotids) and the results were compared with those from conventional biplane angiography. The test was 100% sensitive and had a positive predictive value of 91% for hemodynamically significant lesions. Negative predictive value for normal or less than 50% stenosis was 100%. Carotid bifurcation bruits were heard over only 25% of internal carotids with significant stenosis and nearly 60% of bruits were heard over internal carotids with minor disease. The equipment was portable and relatively inexpensive. The test could be performed by vascular technicians in less than 12 minutes with minimal patient discomfort, thus meeting most of the criteria for an ideal non‐invasive screening test. (Aust NZ J Med 1986; 16: 481–485.)