Umuerri E M, Josephs V A, Obasohan A O
Department of Internal Medicine, Delta State University Teaching Hospital,P.M.B. 07, Oghara, Nigeria.
Niger Postgrad Med J. 2013 Dec;20(4):305-10.
To determine the prevalence of LEAD and compare the accuracy of ABI obtained by automated oscillometric method with Doppler ultrasonography.
This study compared the accuracy of ABI obtained by automated oscillometric method versus that by Doppler among 153 hypertensive patients aged 18 years and above, attending the hypertension clinic of the University of Benin Teaching Hospital, Benin-City.
Of the 153 patients studied, 64 (41.8%) and 48 (31.4%) had ABI <0.9 using hand held Doppler ultrasound and automated oscillometric method respectively, while 39 (25.5%) had LEAD detected by both methods. Assuming the gold standard for diagnosis of LEAD was by Doppler ABI < 0.9, ABI obtained by automated oscillometric method had a sensitivity, specificity, positive and negative likelihood ratios of 60.9%, 89.9%, 6.03 and 0.43 respectively while the area under the receiver operating characteristic curve was 0.787. There was good and positive correlation between ABI obtained by automated oscillometric method and Doppler ultrasound with a Pearson's correlation coefficient of 0.73 and 0.74 for left and right lower limbs respectively (p<0.001) CONCLUSION: ABI obtained using automated oscillometric method is a good alternative to Doppler ultrasonography when screening for LEAD.
确定下肢动脉硬化闭塞症（LEAD）的患病率，并比较自动振荡法与多普勒超声检查获得的踝臂指数（ABI）的准确性。
本研究比较了在贝宁城贝宁大学教学医院高血压门诊就诊的153例18岁及以上高血压患者中，自动振荡法与多普勒法获得ABI的准确性。
在153例研究患者中，分别采用手持式多普勒超声和自动振荡法检测，ABI<0.9的患者有64例（41.8%）和48例（31.4%），两种方法均检测出下肢动脉硬化闭塞症的患者有39例（25.5%）。假设诊断下肢动脉硬化闭塞症的金标准是多普勒ABI<0.9，自动振荡法获得的ABI的灵敏度、特异度、阳性似然比和阴性似然比分别为60.9%、89.9%、6.03和0.43，而受试者工作特征曲线下面积为0.787。自动振荡法获得的ABI与多普勒超声之间存在良好的正相关，左右下肢的Pearson相关系数分别为0.73和0.74（p<0.001）。结论：在筛查下肢动脉硬化闭塞症时，自动振荡法获得的ABI是多普勒超声检查的良好替代方法。
