Use of a simple arm-raising test with a portable laser Doppler blood flow meter to detect dehydration

H. Nogami, W. Iwasaki, T. Abe, Y. Kimura, A. Onoe, E. Higurashi, S. Takeuchi, M. Kido, M. Furue, R. Sawada

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    Using micro electromechanical systems (MEMS) technologies, the authors have developed the world's smallest, lightest, and least power-consuming laser Doppler blood flow meter. Unlike commercial fibre-type blood flow instruments, the new blood flow meter is invulnerable to any movements of the person wearing it and has a wireless transmitter. Utilizing the characteristics of the blood flow meter, the authors attempted to detect dehydration by having a subject simply raise an arm (arm-raising test) with the flow meter attached to a fingertip. Healthy young volunteers (20 men and two women, mean age 22.9, age range 21-27 years) were instructed to perspire in a sauna until they became dehydrated. The target dewatering ratio was 2 per cent, which was calculated from the body weight measured using a weight scale. Four markers were compared: mean blood flow (MBF) before arm-raising, MBF during arm-raising, maximum amplitude (MA) of the pulse wave during arm-raising, and inclination of reflex (IR) wave calculated from the recorded blood flow data for the non-dehydrated (before sauna) and dehydrated (3h after sauna) states in the arm-raising test. Each of the mean total markers (MBF during arm-raising, MA, and IR) was significantly lower (P < 0.05) during the dehydrated state than the non-dehydrated. These results suggest that three markers could detect dehydration and the blood flow meter devised has the potential to be used as a portable device for detecting dehydration.

    Original languageEnglish
    Pages (from-to)411-419
    Number of pages9
    JournalProceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
    Volume225
    Issue number4
    DOIs
    Publication statusPublished - 2011 Apr

    Fingerprint

    Dehydration
    Lasers
    Blood
    Steam Bath
    Reflex
    Dewatering
    MEMS
    Transmitters
    Healthy Volunteers
    Body Weight
    Technology
    Weights and Measures
    Equipment and Supplies
    Fibers

    Keywords

    • Arm-raising test
    • Dehydration
    • Laser Doppler blood flow meter
    • Micro electromechanical systems

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Medicine(all)

    Cite this

    Use of a simple arm-raising test with a portable laser Doppler blood flow meter to detect dehydration. / Nogami, H.; Iwasaki, W.; Abe, T.; Kimura, Y.; Onoe, A.; Higurashi, E.; Takeuchi, S.; Kido, M.; Furue, M.; Sawada, R.

    In: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, Vol. 225, No. 4, 04.2011, p. 411-419.

    Research output: Contribution to journalArticle

    Nogami, H. ; Iwasaki, W. ; Abe, T. ; Kimura, Y. ; Onoe, A. ; Higurashi, E. ; Takeuchi, S. ; Kido, M. ; Furue, M. ; Sawada, R. / Use of a simple arm-raising test with a portable laser Doppler blood flow meter to detect dehydration. In: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 2011 ; Vol. 225, No. 4. pp. 411-419.
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