Fisher C M, Burnett A, Makeham V, Kidd J, Glasson M, Harris J P
Department of Vascular Surgery, Royal North Shore Hospital, St. Leonards, Australia.
J Vasc Surg. 1996 Nov;24(5):871-5. doi: 10.1016/s0741-5214(96)70025-3.
The purpose of this study was to determine the variation in ankle-brachial pressure index (ABPI) measurements in routine clinical practice.
Analysis was done of preoperative and postoperative ABPIs in 130 limbs contralateral to those undergoing femoral bypass grafting in 123 patients over a 15-month period.
The mean initial ABPI was 0.72 (range 0.22 to 1.10). The range of observed differences between the preoperative and postoperative ABPIs was from -0.33 to +0.25. The mean (+/-SD) difference between the first and second ABPIs was 0.00 (+/-0.11). The 95% confidence limits of the difference were -0.21 to 0.21. There was no trend for the size or direction of the difference in ABPI to vary according to the mean ABPI, brachial blood pressure, or time between tests.
ABPI is routinely used as an objective measure of peripheral vascular disease. The variation observed in this study is comparable with values obtained in reproducibility studies and is greater than that accepted in clinical practice. The difference between an ABPI measurement and the actual ABPI and the difference between repeat single measurements are not the same and should be distinguished. Vascular laboratories should determine the accuracy of ABPI measurement on a local basis to guarantee and maintain quality assurance.
本研究旨在确定常规临床实践中踝臂血压指数（ABPI）测量值的变化情况。
对123例患者在15个月期间行股动脉搭桥术对侧的130条肢体术前及术后的ABPI进行分析。
初始平均ABPI为0.72（范围0.22至1.10）。术前与术后ABPI观察到的差异范围为-0.33至+0.25。首次与第二次ABPI的平均（±标准差）差异为0.00（±0.11）。差异的95%置信区间为-0.21至0.21。ABPI差异的大小或方向没有根据平均ABPI、肱动脉血压或两次测试之间的时间而变化的趋势。
ABPI通常用作外周血管疾病的客观测量指标。本研究中观察到的变化与重复性研究中获得的值相当，且大于临床实践中所接受的变化。ABPI测量值与实际ABPI之间的差异以及重复单次测量之间的差异并不相同，应予以区分。血管实验室应在本地确定ABPI测量的准确性，以保证并维持质量保证。
