文献类型：期刊文献

英文题名：INVESTIGATION OF ULTRASOUND-MEASURED FLOW VELOCITY, FLOW RATE AND WALL SHEAR RATE IN RADIAL AND ULNAR ARTERIES USING SIMULATION

作者：Zhou, Xiaowei[1];Xia, Chunming[2,3];Stephen, Gandy[2,3];Khan, Faisel[4];Corner, George A.[1];Hoskins, Peter R.[5];Huang, Zhihong[1]

机构：[1]Univ Dundee, Sch Sci & Engn, Fulton Bldg, Dundee DD1 4HN, Scotland;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai, Peoples R China;[3]Ninewells Hosp, NHS Tayside Med Phys, Dundee, Scotland;[4]Univ Dundee, Ninewells Hosp & Med Sch, Cardiovasc & Diabet Med, Dundee, Scotland;[5]Univ Edinburgh, Ctr Cardiovasc Sci, Edinburgh, Midlothian, Scotland

年份：2017

卷号：43

期号：5

起止页码：981

外文期刊名：ULTRASOUND IN MEDICINE AND BIOLOGY

收录：;EI(收录号：20170903384686);WOS:【SCI-EXPANDED(收录号:WOS:000402485000013)】；

基金：This work is supported by the China Scholarship Council (CSC) and University of Dundee. The authors gratefully acknowledge Dr. Efstratios Kokkalis for his suggestions on Computational Fluid Dynamics at the beginning of this simulation method development and his assistance in obtaining valid magnetic resonance images.

语种：英文

外文关键词：Computational fluid dynamics; Radial artery; Ulnar artery; Flow velocity; Flow rate; Wall shear rate; Womersley; Doppler ultrasound; Simulation; Field II

摘要：Parameters of blood flow measured by ultrasound in radial and ulnar arteries, such as flow velocity, flow rate and wall shear rate, are widely used in clinical practice and clinical research. Investigation of these measurements is useful for evaluating accuracy and providing knowledge of error sources. A method for simulating the spectral Doppler ultrasound measurement process was developed with computational fluid dynamics providing flow-field data. Specific scanning factors were adjusted to investigate their influence on estimation of the maximum velocity waveform, and flow rate and wall shear rate were derived using theWomersley equation. The overestimation in maximum velocity increases greatly (peak systolic from about 10% to 30%, time-averaged from about 30% to 50%) when the beam-vessel angle is changed from 30 degrees to 70 degrees. TheWomersley equation was able to estimate flow rate in both arteries with less than 3% error, but performed better in the radial artery (2.3% overestimation) than the ulnar artery (15.4% underestimation) in estimating wall shear rate. It is concluded that measurements of flow parameters in the radial and ulnar arteries with clinical ultrasound scanners are prone to clinically significant errors. (C) 2017 Published by Elsevier Inc. on behalf of World Federation for Ultrasound in Medicine & Biology.