A new simplified thermoregulatory bioheat model for evaluating thermal response of the human body to transient environments

Zolfaghari, Seyed Alireza; Maerefat, Mehdi

doi:10.1016/j.buildenv.2010.03.002

Cited by 63 publications

(51 citation statements)

References 35 publications

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“…By using this concept, Gagge's two-node mathematical model is based on the energy balance equation involving the outer and inner layers. In particular, the energy balance equation for the core is [27]:…”

Section: Bioheat Equation With Thermoregulationmentioning

confidence: 99%

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Fractional Calculus Based FDTD Modeling of Layered Biological Media Exposure to Wideband Electromagnetic Pulses

Mescia

Bia²,

Chiapperino

et al. 2017

Electronics

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Electromagnetic fields are involved in several therapeutic and diagnostic applications such as hyperthermia and electroporation. For these applications, pulsed electric fields (PEFs) and transient phenomena are playing a key role for understanding the biological response due to the exposure to non-ionizing wideband pulses. To this end, the PEF propagation in the six-layered planar structure modeling the human head has been studied. The electromagnetic field and the specific absorption rate (SAR) have been calculated through an accurate finite-difference time-domain (FDTD) dispersive modeling based on the fractional derivative operator. The temperature rise inside the tissues due to the electromagnetic field exposure has been evaluated using both the non-thermoregulated and thermoregulated Gagge's two-node models. Moreover, additional parametric studies have been carried out with the aim to investigate the thermal response by changing the amplitude and duration of the electric pulses.

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Section: Bioheat Equation With Thermoregulationmentioning

confidence: 99%

“…In particular, the total skin wettedness is due to both diffusion through the skin (w dif ) and regulatory sweating (w rsw ) [27]:…”

Section: Outer Layer Corementioning

confidence: 99%

Fractional Calculus Based FDTD Modeling of Layered Biological Media Exposure to Wideband Electromagnetic Pulses

Mescia

Bia²,

Chiapperino

et al. 2017

Electronics

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show abstract

“…A simplified thermoregulatory bioheat model was recently (2010) developed by coupling the Pennes equation and the Gagge's confort model [106].…”

Section: Thermoregulationmentioning

confidence: 99%

Biofluid Flow and Heat Transfer

Thiriet¹,

Sheu²,

Garon³

2016

Handbook of Fluid Dynamics, Second Edition

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2nd EditionInternational audienceMajor moving biological fluids, or biofluids, are blood and air that cooperate to bring oxygento the body’s cells and eliminate carbon dioxide produced by these cells. Blood is conveyed ina closed network composed of 2 circuits in series — the systemic and pulmonary circulation—, each constituted by arteries, capillaries, and veins, under the synchronized action of theleft and right cardiac pumps, respectively. Air is successively inhaled from and exhaled to theatmosphere through the airway openings (nose and/or mouth). In the head, blood generatesthe cerebrospinal fluid in choroid plexi of all compartments of the ventricular system andreceives it in arachnoid villi. Other biofluids are either secreted, such as bile from the liverand breast milk that both transport released substances with specific tasks, or excreted,such as urine from kidneys or sweat from skin glands that both convey useless materials andwaste produced by the cell metabolism. In addition to the convective transport, peristalsis,which results from the radial contraction and relaxation of mural smooth muscles, propelsthe content of the lumen of the muscular bioconduit (e.g., digestive tract) in an anterogradedirection.Blood circulation and air flow in the respiratory tract are widely explored because oftheir vital functions. Note that inhaled air is transported through the respiratory tract bytwo processes: convection down to bronchioles and diffusion down to pulmonary alveoli.1Furthermore, investigations of these physiological flows in deformable bioconduits give riseto models such as the Starling resistance that themselves become object of new study fieldsin physics and mechanics (e.g., collapsible tubes) as well as of new developments in math-ematical modeling and scientific computing. Whereas fluid–structure interaction problemsin aeronautics and civil engineering deal with materials of distinct properties, blood streamand vessel wall correspond to two domains of nearly equal physical properties, as both bloodand vessels have densities close to that of water. New processing strategies must then beconceived

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“…An important step forward was made by finding that the heat exchange between small arteries and veins typically occurs in parallel [5−7]. Next, the thermoregulatory mechanism was added to the thermal simulations of tissues [8]. Nowadays, there are plenty of new analytical and numerical thermal analyses of the human tissues [9−19].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Perfusion and Thermal Parameters of Skin Tissue Using Cold Provocation and Thermographic Measurements

Strąkowska¹,

Strąkowski²,

Strzelecki³

et al. 2016

Metrology and Measurement Systems

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Measurement of the perfusion coefficient and thermal parameters of skin tissue using dynamic thermography is presented in this paper. A novel approach based on cold provocation and thermal modelling of skin tissue is presented. The measurement was performed on a person's forearm using a special cooling device equipped with the Peltier module. The proposed method first cools the skin, and then measures the changes of its temperature matching the measurement results with a heat transfer model to estimate the skin perfusion and other thermal parameters. In order to assess correctness of the proposed approach, the uncertainty analysis was performed.

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A new simplified thermoregulatory bioheat model for evaluating thermal response of the human body to transient environments

Cited by 63 publications

References 35 publications

Fractional Calculus Based FDTD Modeling of Layered Biological Media Exposure to Wideband Electromagnetic Pulses

Fractional Calculus Based FDTD Modeling of Layered Biological Media Exposure to Wideband Electromagnetic Pulses

Biofluid Flow and Heat Transfer

Evaluation of Perfusion and Thermal Parameters of Skin Tissue Using Cold Provocation and Thermographic Measurements

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