Journal of Life Support Engineering
Online ISSN : 1884-5827
Print ISSN : 1341-9455
ISSN-L : 1341-9455
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Volume 17, Issue 1
Displaying 1-4 of 4 articles from this issue
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  • Present situation about the development of the technique for optical blood glucose level measurement, and the activity for the realization
    Masatoshi Tarumi, Mitsunori Shimada, Hidenobu Arimoto, Katsuhiko Maruo ...
    2005 Volume 17 Issue 1 Pages 3-8
    Published: June 30, 2005
    Released on J-STAGE: July 21, 2010
    DOIhttps://doi.org/10.5136/lifesupport.17.3
    JOURNAL FREE ACCESS
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    Many studies and developments are carrying for the realization of noninvasive and continuous blood glucose level measurement. We describe the present situation about these developments, especially for the methods of the optical blood glucose level measurements that have been studied for several decades. In addition, we describe our study to reduce the errors in the prediction of blood glucose level that are the one of the main problem of optical measurements, using the Monte Carlo simulation and multivariate technique. As the results, we confirmed that the changes in temperature and scattering characteristic induced the errors in the prediction of blood glucose level, and that the errors can be significantly reduced by incorporating the effects of the temperature and scattering characteristic on the spectra to the multivariate analysis.
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  • Study of Micro Flow-Sensor for Micro Pump
    Hisashi NISHIYAMA, Yoshiaki KONISHI, Motoaki MURAKAMI, Masato FUJIWARA ...
    2005 Volume 17 Issue 1 Pages 9-15
    Published: June 30, 2005
    Released on J-STAGE: July 21, 2010
    DOIhttps://doi.org/10.5136/lifesupport.17.9
    JOURNAL FREE ACCESS
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    A micro flow-sensor for measuring the flow rate from a micro pump to be used for insulin injection has been fabricated by MEMS(Micro Electro Mechanical System)technology and tested for the flow rates less than20μl/min. Two measuring methods of thermal type now-sensor have been employed; i.e., themo-tracing and temperature-comparison methods. Thermo-fluid analysis of the micro flow-sensor has been numerically conductcd, and the numerical results have found to agree well with the experimental ones for both measuring methods. The temperature-comparison method has been found to more stable and accurate than the thermo-tracing method in the flow rate range less than10μl/min.
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  • Numerical simulations of blood flow in microcirculation using discrete element method
    Masaru IWATA, Nobuatsu TANAKA, Toru MASUZAW
    2005 Volume 17 Issue 1 Pages 16-21
    Published: June 30, 2005
    Released on J-STAGE: July 21, 2010
    DOIhttps://doi.org/10.5136/lifesupport.17.16
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    In this study, we present a new numerical method simulating blood flow. In pathologic physiology, it is important to investigate property of blood flow because various organopathy is closely related to disorder of blood flow in microcirculation. In the blood flow simulation, narrowness of blood vessel in microcirculation requires considering size of an erythrocyte. Interactions between plasma and an erythrocyte and between erythrocytes are evaluated by using FDM(Finite Difference Method)for plasma modelling and DEM(Discrete Element Method)for erythrocytes modelling. The present method can evaluate the shear stress acting on each erythrocyte, although it is difficult to evaluate it in experiment. In order to confirm the validity of the method, we simulate the blood flow of two-dimensional straight and bending blood vessels and compare velocity profile with experiment result.
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  • Development of Electrically Assisted Walking Support Device for Elderly People
    Ikuo Takeuchi, Saku Egawa, Atsushi Koseki, Masakatsu Fujie, Toshiyo Ta ...
    2005 Volume 17 Issue 1 Pages 22-28
    Published: June 30, 2005
    Released on J-STAGE: July 21, 2010
    DOIhttps://doi.org/10.5136/lifesupport.17.22
    JOURNAL FREE ACCESS
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    It is essential for elderly people to walk by themselves to keep their independence in their daily lives. support their walking, we have developed an electrically assisted walking support device capable of meeting individual use's assistance requirement. Because the walking ability differs person by person, it is necessary to tune the control parameters of the device suitable to individual walking capability. To achieve this, auto-tuning technology that automatically adjusts control parameters such as virtual inertia or viscous resistance was developed and tested by a patient who can hardly walk without help. Test results showed that the electrically assisted walking support device provides high adaptability to elderly people for their mobility.
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