Advanced search
1 file | 7.44 MB

The accuracy of volume flow measurements derived from pulsed wave Doppler: a study in the complex setting of forearm vascular access for hemodialysis

Author
Organization
Abstract
Purpose: Maturation of an arterio-venous fistula (AVF) frequently fails, with low postoperative fistula flow as a prognostic marker for this event. As pulsed wave Doppler (PWD) is commonly used to assess volume flow, we studied the accuracy of this measurement in the setting of a radio-cephalic AVF. Methods: As in-vivo validation of fistula flow measurements is cumbersome, we performed simulations, integrating computational fluid dynamics with an ultrasound (US) simulator. Flow in the arm was calculated, based on a patient-specific model of the arm vasculature pre and post AVF creation. Next, raw ultrasound signals were simulated, from which the Doppler spectra were calculated in both a proximal (brachial) and a distal (radial) location. Results: The velocity component in the direction of the US beam, in a centred, small, sample volume, can be captured accurately using PWD spectrum mean-tracking. However, deriving flow rate from these measurements is prone to errors: (i) the angle-correction which is influenced by the radial velocity components in the complex flow field; (ii) the largest error is introduced due to a lack of knowledge on the spatial flow profile.
Keywords
ULTRASOUND

Downloads

  • proceeding AS1.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 7.44 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Swillens, Abigaïl, Koen Van Canneyt, Lasse Lovstakken, and Patrick Segers. 2013. “The Accuracy of Volume Flow Measurements Derived from Pulsed Wave Doppler: a Study in the Complex Setting of Forearm Vascular Access for Hemodialysis.” In IEEE International Ultrasonics Symposium, 1960–1963. New York, NY, USA: IEEE.
APA
Swillens, A., Van Canneyt, K., Lovstakken, L., & Segers, P. (2013). The accuracy of volume flow measurements derived from pulsed wave Doppler: a study in the complex setting of forearm vascular access for hemodialysis. IEEE International Ultrasonics Symposium (pp. 1960–1963). Presented at the IEEE Ultrasonics Symposium (IUS) 2012, New York, NY, USA: IEEE.
Vancouver
1.
Swillens A, Van Canneyt K, Lovstakken L, Segers P. The accuracy of volume flow measurements derived from pulsed wave Doppler: a study in the complex setting of forearm vascular access for hemodialysis. IEEE International Ultrasonics Symposium. New York, NY, USA: IEEE; 2013. p. 1960–3.
MLA
Swillens, Abigaïl, Koen Van Canneyt, Lasse Lovstakken, et al. “The Accuracy of Volume Flow Measurements Derived from Pulsed Wave Doppler: a Study in the Complex Setting of Forearm Vascular Access for Hemodialysis.” IEEE International Ultrasonics Symposium. New York, NY, USA: IEEE, 2013. 1960–1963. Print.
@inproceedings{3194540,
  abstract     = {Purpose: Maturation of an arterio-venous fistula (AVF) frequently fails, with low postoperative fistula flow as a prognostic marker for this event. As pulsed wave Doppler (PWD) is commonly used to assess volume flow, we studied the accuracy of this measurement in the setting of a radio-cephalic AVF. Methods: As in-vivo validation of fistula flow measurements is cumbersome, we performed simulations, integrating computational fluid dynamics with an ultrasound (US) simulator. Flow in the arm was calculated, based on a patient-specific model of the arm vasculature pre and post AVF creation. Next, raw ultrasound signals were simulated, from which the Doppler spectra were calculated in both a proximal (brachial) and a distal (radial) location. Results: The velocity component in the direction of the US beam, in a centred, small, sample volume, can be captured accurately using PWD spectrum mean-tracking. However, deriving flow rate from these measurements is prone to errors: (i) the angle-correction which is influenced by the radial velocity components in the complex flow field; (ii) the largest error is introduced due to a lack of knowledge on the spatial flow profile.},
  author       = {Swillens, Abiga{\"i}l and Van Canneyt, Koen and Lovstakken, Lasse and Segers, Patrick},
  booktitle    = {IEEE International Ultrasonics Symposium},
  isbn         = {9781467345613},
  keyword      = {ULTRASOUND},
  language     = {eng},
  location     = {Dresden, Germany},
  pages        = {1960--1963},
  publisher    = {IEEE},
  title        = {The accuracy of volume flow measurements derived from pulsed wave Doppler: a study in the complex setting of forearm vascular access for hemodialysis},
  url          = {http://dx.doi.org/10.1109/ULTSYM.2012.0491},
  year         = {2013},
}

Altmetric
View in Altmetric
Web of Science
Times cited: