Observer variability in volumetric blood flow measurements in leg arteries using duplex ultrasound
Observer variability in volumetric blood flow measurements in leg arteries using duplex ultrasound
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DOI：
10.1016/0301-5629(95)02050-0
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发表时间：
1996-01-01
影响因子：
2.9
通讯作者：
Bland, M
中科院分区：
文献类型：
--
作者：
Hussain, ST;Smith, RE;Bland, M
由于在估计横截面积（CSA）和测量时间平均平均流速（TAMeV）时的误差引起的变异性，双超声容积流量测量尚未发现主要的临床应用。我们测定了20名正常受试者静息时股骨总动脉（CFA）及其主要分支——股浅动脉（SFA）和股深动脉（PFA）的血流量在观察者间和观察者内的变化。以TAMeV和CSA的产物作为体积流。TAMeV的变异系数始终大于CSA。观察者间血流变化（CFA、SFA和PFA分别为16.2%、20.2%和40.3%）大于观察者内血流变化（13.0%、15.1%、21.2%）。总之，这些数据定义了可以实际检测到的VQ的最小变化，并表明，使用现代双多普勒设备，体积流量可以作为一种可靠的血流动力学测量方法，用于监测手术或放射干预前后的患者。
Duplex ultrasound volumetric flow measurements have not found a major clinical use because of variability caused by errors in estimating cross-sectional area (CSA) and in measuring time averaged mean velocity (TAMeV). We determined inter- and intraobserver variation in volumetric blood flow measured at rest in the common femoral artery (CFA) and its main branches, the superficial femoral (SFA) and profunda femoris (PFA) arteries, in 20 normal subjects. The product of TAMeV and CSA was taken as volumetric flow. The coefficient of variation of TAMeV was consistently greater than that of CSA. Interobserver variation for blood flow (16.2%, 20.2% and 40.3% for CFA, SFA and PFA, respectively) was larger than intraobserver variation (13.0%, 15.1%, 21.2%). In conclusion, these data define the minimum changes in VQ that can be realistically detected and indicate that, with modern duplex Doppler equipment, volumetric flow can be used as a reliable haemodynamic measure for monitoring patients before and after surgical or radiological intervention.