Photoplethysmography: a valuable noninvasive tool in the assessment of venous dysfunction?

摘要: Abstract We have investigated the photoplethysmography findings in 152 patients admitted to Middlesex Hospital Vascular Laboratory with suspected lower limb venous disease, and we compared results obtained patient grouping using clinical criteria presence of reflux on color duplex scanning. All traces were normalized use computer software enable direct comparison between traces. The parameters 95% 50% refilling times initial gradient curve. Receiver operating characteristic curves constructed determine which parameter was most useful predictor disease identify value within each observation gave greatest sensitivity specificity. found a large overlap interquartile values for all three parameters, limbs grouped both clinically by scanning, making differentiation normal abnormal difficult basis alone. that time less than 15 seconds indicated dysfunction specificity suggest this is useful. Photoplethysmography readings are reproducible, noninvasive, correlate well remains assessment dysfunction. (J Vasc Surg 1992;16:154–62.)