Oculopneumoplethysmography, Doppler Examina tion, and Supra orbital Photoplethysmography

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Abstract
Three noninvasive techniques used in the evaluation of carotid occlusive disease were compared in the same patient population group. The cerebrovascular Doppler examination (CDE) had an accuracy rate of 89%, oculopneumoplethysmography (OPG-Gee) an accuracy rate of 94% and supraorbital photoplethysmography (SOPPG) an accuracy rate of 86%. With the combined use of the CDE and the OPG-Gee, the accuracy rate increased to 96% when the results were concordant and the false-negative rate dropped to 3%. The combined use of the CDE and the OPG-Gee apparently offers an advantage over either technique used individually.