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Simultaneous X-ray Video-Fluoroscopy and Pulsed Ultrasound Velocimetry Analyses of the Pharyngeal Phase of Swallowing of Boluses with Different Rheological Properties.
Dysphagia. 2020 12; 35(6):898-906.D

Abstract

The Ultrasound Velocity Profiling (UVP) technique allows real-time, non-invasive flow mapping of a fluid along a 1D-measuring line. This study explores the possibility of using the UVP technique and X-ray video-fluoroscopy (XVF) to elucidate the deglutition process with the focus on bolus rheology. By positioning the UVP probe so that the pulsed ultrasonic beam passes behind the air-filled trachea, the bolus flow in the pharynx can be measured. Healthy subjects in a clinical study swallowed fluids with different rheological properties: Newtonian (constant shear viscosity and non-elastic); Boger (constant shear viscosity and elastic); and shear thinning (shear rate-dependent shear viscosity and elastic). The results from both the UVP and XVF reveal higher velocities for the shear thinning fluid, followed by the Boger and the Newtonian fluids, demonstrating that the UVP method has equivalent sensitivities for detecting the velocities of fluids with different rheological properties. The velocity of the contraction wave that clears the pharynx was measured in the UVP and found to be independent of bolus rheology. The results show that UVP not only assesses accurately the fluid velocity in a bolus flow, but it can also monitor the structural changes that take place in response to a bolus flow, with the added advantage of being a completely non-invasive technique that does not require the introduction of contrast media.

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Authors+Show Affiliations

Qazi WM
Agrifood and Bioscience, Product Design and Perception, RISE, Research Institutes of Sweden AB, Göteborg, Sweden. muhammad.waqas@nofima.no. Department of Industrial and Material Sciences, Chalmers University of Technology, Göteborg, Sweden. muhammad.waqas@nofima.no.
Ekberg O
Diagnostic Centre of Imaging and Functional Medicine, Skåne University Hospital, Lund, Sweden.
Wiklund J
Incipientus Ultrasound Flow Technologies AB, Frans Perssons Väg 6, 412 76, Göteborg, Sweden.
Mansoor R
Nuffield Department of Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK.
Stading M
Agrifood and Bioscience, Product Design and Perception, RISE, Research Institutes of Sweden AB, Göteborg, Sweden. Department of Industrial and Material Sciences, Chalmers University of Technology, Göteborg, Sweden.

MeSH

CineradiographyDeglutitionHumansPharynxRheologyUltrasonic WavesViscosityX-Rays

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Review

Language

eng

PubMed ID

32048021

Citation

Qazi, Waqas M., et al. "Simultaneous X-ray Video-Fluoroscopy and Pulsed Ultrasound Velocimetry Analyses of the Pharyngeal Phase of Swallowing of Boluses With Different Rheological Properties." Dysphagia, vol. 35, no. 6, 2020, pp. 898-906.
Qazi WM, Ekberg O, Wiklund J, et al. Simultaneous X-ray Video-Fluoroscopy and Pulsed Ultrasound Velocimetry Analyses of the Pharyngeal Phase of Swallowing of Boluses with Different Rheological Properties. Dysphagia. 2020;35(6):898-906.
Qazi, W. M., Ekberg, O., Wiklund, J., Mansoor, R., & Stading, M. (2020). Simultaneous X-ray Video-Fluoroscopy and Pulsed Ultrasound Velocimetry Analyses of the Pharyngeal Phase of Swallowing of Boluses with Different Rheological Properties. Dysphagia, 35(6), 898-906. https://doi.org/10.1007/s00455-020-10092-4
Qazi WM, et al. Simultaneous X-ray Video-Fluoroscopy and Pulsed Ultrasound Velocimetry Analyses of the Pharyngeal Phase of Swallowing of Boluses With Different Rheological Properties. Dysphagia. 2020;35(6):898-906. PubMed PMID: 32048021.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simultaneous X-ray Video-Fluoroscopy and Pulsed Ultrasound Velocimetry Analyses of the Pharyngeal Phase of Swallowing of Boluses with Different Rheological Properties. AU - Qazi,Waqas M, AU - Ekberg,Olle, AU - Wiklund,Johan, AU - Mansoor,Rashid, AU - Stading,Mats, Y1 - 2020/02/11/ PY - 2019/04/06/received PY - 2020/01/30/accepted PY - 2020/2/13/pubmed PY - 2021/11/25/medline PY - 2020/2/13/entrez KW - Deglutition KW - Deglutition disorders KW - Fluids KW - Rheology KW - Ultrasound KW - Video-fluoroscopy SP - 898 EP - 906 JF - Dysphagia JO - Dysphagia VL - 35 IS - 6 N2 - The Ultrasound Velocity Profiling (UVP) technique allows real-time, non-invasive flow mapping of a fluid along a 1D-measuring line. This study explores the possibility of using the UVP technique and X-ray video-fluoroscopy (XVF) to elucidate the deglutition process with the focus on bolus rheology. By positioning the UVP probe so that the pulsed ultrasonic beam passes behind the air-filled trachea, the bolus flow in the pharynx can be measured. Healthy subjects in a clinical study swallowed fluids with different rheological properties: Newtonian (constant shear viscosity and non-elastic); Boger (constant shear viscosity and elastic); and shear thinning (shear rate-dependent shear viscosity and elastic). The results from both the UVP and XVF reveal higher velocities for the shear thinning fluid, followed by the Boger and the Newtonian fluids, demonstrating that the UVP method has equivalent sensitivities for detecting the velocities of fluids with different rheological properties. The velocity of the contraction wave that clears the pharynx was measured in the UVP and found to be independent of bolus rheology. The results show that UVP not only assesses accurately the fluid velocity in a bolus flow, but it can also monitor the structural changes that take place in response to a bolus flow, with the added advantage of being a completely non-invasive technique that does not require the introduction of contrast media. SN - 1432-0460 UR - https://www.unboundmedicine.com/medline/citation/32048021/Simultaneous_X_ray_Video_Fluoroscopy_and_Pulsed_Ultrasound_Velocimetry_Analyses_of_the_Pharyngeal_Phase_of_Swallowing_of_Boluses_with_Different_Rheological_Properties_ DB - PRIME DP - Unbound Medicine ER -