Jönsson B, Laurent C, Eneling M, Skau T, Lindberg L-G
Department of Cardiovascular Surgery and Anaesthesia, University Hospital, Linköping, Sweden.
Eur J Vasc Endovasc Surg. 2005 Oct;30(4):395-401. doi: 10.1016/j.ejvs.2005.05.012.
To evaluate a new technique using a photoplethysmographic (PPG) probe for automatic ankle pressure measurements.
Comparative study on two techniques for ankle pressure measurement.
University hospital.
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.
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.
评估一种使用光电容积脉搏波描记法（PPG）探头进行自动踝部压力测量的新技术。
两种踝部压力测量技术的对比研究。
大学医院。
35例腿部动脉疾病患者和8名健康志愿者。使用传统连续波多普勒技术和基于PPG的原型设备记录踝部压力，测量踝臂指数（ABPI）。
根据连续波多普勒和PPG踝部压力测量计算得出的ABPI。通过视觉判断和基于软件的自动算法对PPG信号进行分析。
根据连续波多普勒记录和PPG（视觉分析）计算得出的ABPI之间的平均差异为-0.01（一致性界限（±两个标准差）为+0.16至-0.19）。相关系数为0.93。使用该算法时，平均差异（连续波多普勒-PPG）为0.05（一致性界限为0.28至-0.18，r = 0.89）。
PPG方法是一种有前景的技术，具有自动进行踝部压力测量的内在潜力，从而减少ABPI记录中的观察者依赖性。
