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Quantitative Evaluation of a Telerobotic System for Vascular Ultrasound Measurement on a Short Arm Human Centrifuge

Frett, Timo and Petrat, Guido and Arz, Michael and Leguy, Carole A.D. (2021) Quantitative Evaluation of a Telerobotic System for Vascular Ultrasound Measurement on a Short Arm Human Centrifuge. Microgravity Science and Technology, 33 (1), p. 14. Springer. doi: 10.1007/s12217-020-09850-8. ISSN 0938-0108.

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Official URL: https://doi.org/10.1007/s12217-020-09850-8


Artificial Gravity generated by Short Arm Human Centrifuges is a promising multi-system countermeasure for physiological deconditioning during long duration space flights. To allow a continuous assessment of cardiovascular hemodynamics during centrifugation, a telerobotic robotic system holding an ultrasound probe has been installed on a Short Arm Human Centrifuge. A feasibility study was conducted to define the use capabilities and limitations of such a novel method. The objective of this study is to estimate the reproducibility and precision of remotely controlled vascular ultrasound assessment under centrifugation by assessing peripheral vascular diameter and wall distension. Four repeated centrifugation runs of 5 min, with 2.4 g at feet level, were performed including a 15 min rest between each run for a group of eight healthy male volunteers. Vascular diameter and distention were assessed for the common carotid artery (CCA) and the femoral artery (FA) by ultrasound imaging using a 10 MHz linear array probe (Mylab1, Esaote). Ultrasound measurements were consecutively performed: a) by an expert user in hand-held mode in standing as well as supine position, b) using the telerobotic arm without centrifugation as baseline and c) using the telerobotic arm during centrifugation. Vascular responses were compared between baseline and under centrifugation. Inter-, intra-registration and group variability have been assessed for hand-held and remotely controlled examination. The results show that intra-registration variability, σ h , was always smaller than inter-registration variability, σ m, that is in turned smaller than the inter-subject variability σ g (σ h < σ m < σ g). Centrifugation caused no significant changes in CCA diameter but a lower carotid distension compared to manual and robotic ultrasound in supine position (p < 0.05). Femoral diameter was significantly decreased in hypergravity compared to robotic sonography without centrifugation. A good reproducibility and precision of the remotely controlled vascular ultrasound assessment under centrifugation could be demonstrated. In conclusion, arterial wall dynamics can be precisely assessed for the CCA and femoral artery during centrifugation using a telerobotic ultrasound measurement system. Potential improvements to further enhance reproducibility and safety of the system are discussed.

Item URL in elib:https://elib.dlr.de/144021/
Document Type:Article
Title:Quantitative Evaluation of a Telerobotic System for Vascular Ultrasound Measurement on a Short Arm Human Centrifuge
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Frett, TimoUNSPECIFIEDhttps://orcid.org/0000-0002-5572-1177UNSPECIFIED
Petrat, GuidoDLR, Institut für Luft- und Raumfahrtmedizin, Abteilung BIOUNSPECIFIEDUNSPECIFIED
Arz, MichaelInstitute of Aerospace Medicine, German Aerospace Center (DLR), Linder Hoehe, Cologne, Germanyhttps://orcid.org/0000-0002-6004-5257UNSPECIFIED
Leguy, Carole A.D.Institute of Aerospace Medicine, German Aerospace Center and Institute of Measuring and Sensor Technology, Ruhr West University of Applied Science, Mülheim an der Ruhr, GermanyUNSPECIFIEDUNSPECIFIED
Date:23 January 2021
Journal or Publication Title:Microgravity Science and Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 14
Keywords:Artificial gravity; Space physiology; Telerobotic; Ultrasound imaging; Vascular response
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - User Centre Research under Space Conditions
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Gravitational Biology
Deposited By: Frett, Timo
Deposited On:21 Sep 2021 14:01
Last Modified:28 Jun 2023 13:03

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