Key result
Automated photo-plethysmography devices showed only moderate concordance with Doppler sonography (OCCC 0.34 for Vicorder and 0.33 for Vascular Explorer) and significantly overestimated ABI values.
Why the study?
Do automated PPG-based devices (Vicorder and Vascular Explorer) provide valid and reliable ABI measurements compared to manual Doppler sonography in healthy subjects?
Cross-Sectional (n=56)
No
Do automated PPG-based devices (Vicorder and Vascular Explorer) provide valid and reliable ABI measurements compared to manual Doppler sonography in healthy subjects?
Effect estimate: OCCC 0.34 for Vicorder and 0.33 for Vascular Explorer
p-value: p=0.95
Automated PPG-based ABI devices are feasible for epidemiologic studies but yield systematically higher ABI values than manual Doppler, necessitating adjusted cut-offs for cardiovascular risk stratification.
No takes yet. Share an insight, caveat, or question.
Automated PPG ABI devices should not replace Doppler without adjusted thresholds; leaves open their epidemiologic utility pending prospective validation.
Teren et al. (2013) conducted a cross-sectional in Healthy subjects (Ankle-brachial index assessment) (n=56). Automated photo-plethysmography (Vicorder and Vascular Explorer) vs. Manual Doppler sonography was evaluated on Agreement of automated ABI results with Doppler sonography (Overall concordance correlation coefficient) (OCCC 0.34 for Vicorder and 0.33 for Vascular Explorer, p=0.95). Automated photo-plethysmography devices showed only moderate concordance with Doppler sonography (OCCC 0.34 for Vicorder and 0.33 for Vascular Explorer) and significantly overestimated ABI values.
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