Developing computer model for analysis of human cold tolerance.

Yokoyama, S.; Ogino, Hitoshi

doi:10.2114/ahs1983.4.183

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…Owing to the unique characteristics in hemodynamics and thermoregulation and potential applications, developing a computational model of the human extremity or human body that can simulate the physiological characteristics is always a subject for further investigation. Yokoyama and Ogino (1985) put forward a computer model to investigate cold-stressed effects on the finger. They developed a physiological model of the finger according to measurements and anatomical structure.…”

Section: Introductionmentioning

confidence: 99%

Finite element numerical analysis of blood flow and temperature distribution in three‐dimensional image‐based finger model

Himeno

Líu

et al. 2008

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Purpose-The purpose of this paper is to investigate the blood flow and temperature distribution in human extremities. Design/methodology/approach-The simulation is carried out from three aspects. Firstly, the hemodynamics in the human upper limb is analyzed by one-dimensional model for pulsalite flow in an elastic tube. Secondly, the blood flow and heat transfer through living tissues are described basing on porous media theory, and the tissue model is coupled with the one-dimensional blood flow model. With respect to geometric modeling, MR-image-based modeling method is employed to construct a realistic model of the human finger. Findings-It is found that the temperature variation is closely related to the blood flow variation in the fingertip and the blood flow distribution in the tissue is dependent on the locations of large arteries and veins. Originality/value-Blood flow and temperature distribution in a 3D realistic human finger are firstly obtained by coupling the blood circulation and porous media model.

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Section: Introductionmentioning

confidence: 99%

Finite element numerical analysis of blood flow and temperature distribution in three‐dimensional image‐based finger model

Himeno

Líu

et al. 2008

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Human thermal models for evaluating infrared images

Kakuta

Yokoyama²,

Mabuchi³

2002

IEEE Eng. Med. Biol. Mag.

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Numerical and Experimental Study on the Relationship Between Blood Circulation and Peripheral Temperature

Líu

Himeno

et al. 2005

J. Mech. Med. Biol.

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Computational simulation of the thermal transport phenomena in the human body has recently aroused a great deal of interest among researchers, because it can be applied in different areas such as medicine, rehabilitation, space suits, and others. In this study, we developed a coupling model to analyze the temperature distribution of the human middle finger. Firstly, a one-dimensional thermo-fluid model of blood circulation in the human upper limb is constructed. Secondly, a two-dimensional thermal model of the human finger, which consists of skin, tendon, bone, main arteries, and veins is developed. The two models are further coupled weakly through data transfer. The blood pressure, blood flow rate, and blood temperature at different vessel sites and the tissue temperature are thus obtained. The effect of viscosity on the finger skin temperature was also investigated. Simultaneously, the thermograms of the human hand were also obtained using thermograpy under the resting condition and after jogging, to observe the variation in the blood circulation. The temperature at different points was extracted from the thermograms. It is observed that there is a periodic variation in skin temperature near the blood vessels after jogging. It is expected that this coupling model will be applicable to hyperthermia, drug delivery, and sports training.

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Developing computer model for analysis of human cold tolerance.

Cited by 4 publications

References 2 publications

Finite element numerical analysis of blood flow and temperature distribution in three‐dimensional image‐based finger model

Finite element numerical analysis of blood flow and temperature distribution in three‐dimensional image‐based finger model

Human thermal models for evaluating infrared images

Numerical and Experimental Study on the Relationship Between Blood Circulation and Peripheral Temperature

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