Doppler ultrasound and supraorbital photoplethysmography for noninvasive screening of carotid occlusive disease.

Doppler ultrasound and supraorbital photoplethysmography were 95 per cent accurate in identifying or excluding significant carotid obstruction in 156 vessels of seventy-six consecutive patients undergoing arteriography. Plethysmography was more sensitive but less specific than Doppler ultrasound. These technics provide simple, rapid, and accurate detection of significant carotid occlusive disease.