Automatic ankle pressure measurements using PPG in ankle-brachial pressure index determination
2005 (English)In: European Journal of Vascular and Endovascular Surgery, ISSN 1078-5884, E-ISSN 1532-2165, Vol. 30, no 4, 395-401 p.Article in journal (Refereed) Published
To evaluate a new technique using a photoplethysmographic (PPG) probe for automatic ankle pressure measurements.
Comparative study on two techniques for ankle pressure measurement.
Thirty-five patients with leg arterial disease and eight healthy volunteers. Ankle-brachial indices (ABPI) were measured using conventional CW Doppler technique and PPG-based prototype equipment for the ankle pressure recordings.
Chief outcome measures
ABPIs calculated from CW Doppler and PPG ankle pressure measurements. The PPG signals were analysed both by visual judgement and by a software based, automatic algorithm.
The mean difference between ABPIs calculated from CW Doppler recordings and PPG (visual analysis) was −0.01 (limits of agreement (±two standard deviations) +0.16 to −0.19). The correlation coefficient was 0.93. When the algorithm was used, the mean difference (CW Doppler−PPG) was 0.05 (limits of agreement 0.28 to −0.18, r=0.89).
The PPG method is a promising technique with an inherent potential for automatisation of the ankle pressure measurements, thereby reducing the observer-dependency in ABPI recordings.
Place, publisher, year, edition, pages
2005. Vol. 30, no 4, 395-401 p.
photoplethysmography, ankle, blood pressure determination, ultrasonography, Doppler
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-30084DOI: 10.1016/j.ejvs.2005.05.012PubMedID: 15964772Local ID: 15552OAI: oai:DiVA.org:liu-30084DiVA: diva2:250905