在踝臂指数测定中使用脉搏波信号（PPG）自动测量踝部血压。

Automatic ankle pressure measurements using PPG in ankle-brachial pressure index determination.

作者信息

Jönsson B, Laurent C, Eneling M, Skau T, Lindberg L-G

机构信息

Department of Cardiovascular Surgery and Anaesthesia, University Hospital, Linköping, Sweden.

出版信息

Eur J Vasc Endovasc Surg. 2005 Oct;30(4):395-401. doi: 10.1016/j.ejvs.2005.05.012.

DOI:10.1016/j.ejvs.2005.05.012

PMID:15964772

Abstract

OBJECTIVE

To evaluate a new technique using a photoplethysmographic (PPG) probe for automatic ankle pressure measurements.

DESIGN

Comparative study on two techniques for ankle pressure measurement.

SETTING

University hospital.

MATERIAL

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.

MAIN RESULTS

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).

CONCLUSIONS

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.

摘要