光电容积脉搏波描记法，一种测量踝臂压力指数的简便且准确的方法：光电容积脉搏波描记法能否替代多普勒超声？
Photoplethysmography, an easy and accurate method for measuring ankle brachial pressure index: can photoplethysmography replace Doppler?
作者信息
Khandanpour Nader, Armon Matthew P, Jennings Barbara, Clark Allan, Meyer Felicity J
机构信息
Norfolk and Norwich University Hospital NHS Trust, Vascular Surgery Unit, UK.
出版信息
Vasc Endovascular Surg. 2009 Dec;43(6):578-82. doi: 10.1177/1538574409334829. Epub 2009 Jul 29.
OBJECTIVE
To assess the accuracy of ankle brachial pressure index (ABPI) assessed by photoplethysmography (PPG) compared with continuous wave Doppler (CW-Doppler).
METHODS
Ankle brachial pressure index was measured in a standard manner using both PPG and Doppler probes. For PPG-ABPI, a PPG probe was placed on the index finger and great toe, and a microcomputer determined the ABPI. These values were compared with the ABPI measured manually using an 8-MHz Doppler probe. Correlation and agreement between PPG and Doppler ABPI were assessed by Lin's correlation coefficient and Bland-Altman plots.
RESULTS
In all, 133 claudicants were assessed. There was a strong correlation between the 2 ABPI methods (beta = .79 and 95% limits of agreement of -0.23 to 0.24).
CONCLUSION
Measuring ABPI automatically using the PPG technique is an effective alternative for Doppler ABPI. PPG-ABPI is completely objective, fast, and accurate.
目的
评估通过光电容积脉搏波描记法（PPG）评估的踝臂指数（ABPI）与连续波多普勒（CW - 多普勒）相比的准确性。
方法
使用PPG探头和多普勒探头以标准方式测量踝臂指数。对于PPG - ABPI，将PPG探头置于食指和大脚趾上，由微型计算机确定ABPI。将这些值与使用8兆赫多普勒探头手动测量的ABPI进行比较。通过林氏相关系数和布兰德 - 奥特曼图评估PPG和多普勒ABPI之间的相关性和一致性。
结果
总共评估了133名跛行患者。两种ABPI测量方法之间存在强相关性（β = 0.79，一致性界限为 - 0.23至0.24）。
结论
使用PPG技术自动测量ABPI是多普勒ABPI的有效替代方法。PPG - ABPI完全客观、快速且准确。
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