Effect of carotid artery stenosis on neck skin tissue heat transfer

Saxena, Ashish; Ng, Eddie Yin-Kwee; Mathur, Mrudang; Manchanda, Chirag; Jajal, Nehal

doi:10.1016/j.ijthermalsci.2019.106010

Cited by 17 publications

(17 citation statements)

References 47 publications

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“…Given the inlet flow condition is same in this study, use of surface thermal features to distinguish the two stenosis models is the most appropriate method. This was earlier reported in our computational study [7], where, for the same inlet flow conditions, the presence of a cold feature was found to have distinguished the varied degree of stenosis in the computational carotid artery models. Furthermore, in the work of Capistrant and Gumnit [3], while mean temperature was found to be significantly different between normal and stenosed samples, it resulted in lower classification sensitivity of 57%.…”

Section: Discussionsupporting

confidence: 85%

“…3). The geometrical details of the carotid artery model can be found in our previous works [7,13]. To cast the PDMS carotid artery models, first, a hollow carotid artery mold was prepared in two halves using 3D printed carotid artery geometry.…”

Section: Carotid Artery Model Fabricationmentioning

confidence: 99%

“…While the minimum and maximum flow volume rates were found to be 32.5 ml/s and 55.7 ml/s, respectively, for peak systolic phase, they were found to be 7 mL/s and 22.9 mL/s, respectively, for end diastolic phase. In our computational studies [7,18], on a similar geometric model, the literature-based oscillatory physiological carotid artery blood flow volume rate was used in the range of 4 mL/s to 14 mL/s. In an in vitro carotid artery flow loop-based study by Kabinejadian et al [12], the cyclic blood flow volume was found to be in the range of 3.3-15 mL/s.…”

Section: Carotid Artery Flow Loop Commissioningmentioning

confidence: 99%

“…In the work of Yang and Liu [6], computationally modeling the artery as a cylindrical tube, the authors showed that a geometrical increase in the span of the stenosis, from 3 mm to 8 mm, resulting in 0.06% decrease in the skin surface temperature. In our previous first of its kind computational study [7], we used an idealized three-dimensional (3D) carotid artery bifurcation computational geometry [8] with ICA stenosis in the range of 25%-90% (% occlusion of the cross-sectional diameter) and literature-based inlet flow conditions [9]. This resulted in an indirect quantitative measure of stenosis through the presence of a colder region, called "cold feature," on the skin surface.…”

Section: Introductionmentioning

confidence: 99%

“…However, none of these studies considered any aspects of heat transfer. Therefore, the focus of this study is to evaluate the carotid artery stenosis influenced skin temperature features, in a thermally charged idealized 3D carotid artery flow model [7]. The carotid artery model was fabricated with silicone encapsulation simulating the neck tissue around the carotid artery, followed by thermal imaging using a noncontact infrared (IR) thermography technique.…”

Section: Introductionmentioning

confidence: 99%

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Relation Between Neck Skin Temperature Measurement and Carotid Artery Stenosis: In-Vitro Evaluation

Saxena

Canchi

et al. 2020

Journal of Biomechanical Engineering

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Carotid artery stenosis (CAS) is a form of atherosclerosis, where thrombus formation restricts the passage of blood through the carotid artery leading to irreversible damage in the brain tissue. The presence of stenosis in the carotid artery results in abnormal temperature maps on the external skin surface, which can be captured and quantified using non-contact/non-invasive infrared (IR) thermal imaging/thermography. In this study, a thermally charged in-vitro carotid artery flow loop, using 0% and 75% stenosis models, was designed to study the thermal effect on the external skin surface. The carotid artery flow was encapsulated with PDMS (polydimethylsiloxane) resembling neck tissue, of which the external surface temperature maps were studied using IR thermography. Using the mean temperature as a threshold value, the resultant thermal image was processed and normalized. Between the two stenosis models, disruption in the thermal features corresponding to the presence of stenosis was observed. The method described in this study paves the path to experimentally study the thermal effect of the presence of stenosis in the carotid artery.

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Section: Discussionsupporting

confidence: 85%

Section: Carotid Artery Model Fabricationmentioning

confidence: 99%

Section: Carotid Artery Flow Loop Commissioningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relation Between Neck Skin Temperature Measurement and Carotid Artery Stenosis: In-Vitro Evaluation

Saxena

Canchi

et al. 2020

Journal of Biomechanical Engineering

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Heat transport in magnetohydrodynamic physiological blood flow through a constricted artery

Mukhopadhyay¹,

Mandal²

2023

Heat Trans

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In this paper, we study how the magnetohydrodynamic (MHD) pulsatile flow of blood and heat transfer works through a constricted artery with a flexible wall. The human circulatory network consists of veins and arteries that sometimes contain constrictions, allowing the impact of the applied magnetic field on flow fields to be observed. The walls of the flowing medium are considered to be a function of time. The flowing blood is hypothesized as shear‐thinning fluid, emulating Yeleswarapu's viscosity replica. Additionally, we consider the energy equation to understand the impact of a magnetic field on heat transfer rates for such flows. The vorticity transport equation along with the stream function equation is obtained using the vorticity–stream function technique. Numerical solutions of the governing nonlinear MHD equations and energy equation in addition to physically pertinent flow conditions were achieved by adapting a finite difference scheme. Considerable attention has been paid to ensure an accurate comparison between the current and previous results. The two sets of numbers appear to match closely. For an even deeper understanding of the flow and heat transport process, the effects of height of stenosis and diverse physiological parameters on time‐averaged wall shear stress (TAWSS), rate of heat transport, and so on are explored in depth through their graphical depiction. In the vicinity of the constriction, it is observed that the separation becomes longer with increasing constriction height. Higher magnetic force strength leads to a reduction in separation length. Newtonian fluids transfer heat more rapidly in their narrowing regions and downstream than fluids with non‐Newtonian behavior.

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Infrared (IR) thermography as a potential screening modality for carotid artery stenosis

Saxena

Lim

2019

Computers in Biology and Medicine

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Effect of carotid artery stenosis on neck skin tissue heat transfer

Cited by 17 publications

References 47 publications

Relation Between Neck Skin Temperature Measurement and Carotid Artery Stenosis: In-Vitro Evaluation

Relation Between Neck Skin Temperature Measurement and Carotid Artery Stenosis: In-Vitro Evaluation

Heat transport in magnetohydrodynamic physiological blood flow through a constricted artery

Infrared (IR) thermography as a potential screening modality for carotid artery stenosis

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