TY - JOUR
T1 - Vector and Doppler Ultrasound Velocities Evaluated in a Flow Phantom and the Femoropopliteal Vein
AU - Bechsgaard, Thor
AU - Hansen, Kristoffer Lindskov
AU - Brandt, Andreas Hjelm
AU - Holbek, Simon
AU - Forman, Julie Lyng
AU - Strandberg, Charlotte
AU - Lönn, Lars
AU - Bækgaard, Niels
AU - Jensen, Jørgen Arendt
AU - Nielsen, Michael Bachmann
PY - 2017
Y1 - 2017
N2 - Ultrasound is used for evaluating the veins of the lower extremities. Operator and angle dependency limit spectral Doppler ultrasound (SDUS). The aim of the study was to compare peak velocity measurements in a flow phantom and the femoropopliteal vein of 20 volunteers with the angle-independent vector velocity technique vector flow imaging (VFI) and SDUS. In the flow phantom, VFI underestimated velocity (p = 0.01), with a lower accuracy of 5.5% (p = 0.01) and with no difference in precision, that is, error factor, compared with SDUS (VFI: 1.02 vs. SDUS: 1.02, p = 0.58). In vivo, VFI estimated lower velocities (femoral: p = 0.001; popliteal: p = 0.001) with no difference in precision compared with SDUS (femoral: VFI 1.09 vs. SDUS 1.14, p = 0.37; popliteal: VFI 1.13 vs. SDUS 1.06, p = 0.09). In conclusion, the precise VFI technique can be used to characterize venous hemodynamics of the lower extremities despite its underestimation of velocities.
AB - Ultrasound is used for evaluating the veins of the lower extremities. Operator and angle dependency limit spectral Doppler ultrasound (SDUS). The aim of the study was to compare peak velocity measurements in a flow phantom and the femoropopliteal vein of 20 volunteers with the angle-independent vector velocity technique vector flow imaging (VFI) and SDUS. In the flow phantom, VFI underestimated velocity (p = 0.01), with a lower accuracy of 5.5% (p = 0.01) and with no difference in precision, that is, error factor, compared with SDUS (VFI: 1.02 vs. SDUS: 1.02, p = 0.58). In vivo, VFI estimated lower velocities (femoral: p = 0.001; popliteal: p = 0.001) with no difference in precision compared with SDUS (femoral: VFI 1.09 vs. SDUS 1.14, p = 0.37; popliteal: VFI 1.13 vs. SDUS 1.06, p = 0.09). In conclusion, the precise VFI technique can be used to characterize venous hemodynamics of the lower extremities despite its underestimation of velocities.
KW - Femoral vein
KW - Flow phantom
KW - Peak velocity
KW - Popliteal vein
KW - Spectral Doppler
KW - Ultrasound
KW - Vector flow imaging
U2 - 10.1016/j.ultrasmedbio.2017.06.020
DO - 10.1016/j.ultrasmedbio.2017.06.020
M3 - Journal article
C2 - 28750944
SN - 0301-5629
VL - 43
SP - 2477
EP - 2487
JO - Ultrasound in Medicine and Biology
JF - Ultrasound in Medicine and Biology
IS - 10
ER -