Disclosure of the significant thermal effects of large blood vessels during cryosurgery through infrared temperature mapping

Deng, Zhong-Shan; Liu, Jing; Wang, Hongwu

doi:10.1016/j.ijthermalsci.2007.05.007

Cited by 21 publications

(7 citation statements)

References 26 publications

(32 reference statements)

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“…; n. It is worthwhile to mention here that the error ðDV i Þ n at the boundary is zero, because the values of V i at the boundary are known. Using (19) in (15) and dropping the quadratic and higher order terms in ðDV i Þ n , we get a system of block tri-diagonal equations. To solve this tri-diagonal system of equations, we have used the ''Tri-diagonal matrix algorithm'', usually referred as ''Thomas algorithm'' (cf.…”

Section: Heat Mass Transfer (2013) 49:617-628 621mentioning

confidence: 99%

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Effect of thermal radiation on MHD flow of blood and heat transfer in a permeable capillary in stretching motion

Misra

Sinha

2013

Heat Mass Transfer

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In this paper, a theoretical analysis is presented for magnetohydrodynamic flow of blood in a capillary, its lumen being porous and wall permeable. The unsteadiness in the flow and temperature fields is caused by the timedependence of the stretching velocity and the surface temperature. Thermal radiation, velocity slip and thermal slip conditions are taken into account. In order to study the flow field as well as the temperature field, the problem is formulated as a boundary value problem consisting of a system of nonlinear coupled partial differential equations. The problem is analysed by using similarity transformation and boundary layer approximation. Solution of the problem is achieved by developing a suitable numerical method and using high speed computers. Computational results for the variation in velocity, temperature, skin-friction co-efficient and Nusselt number are presented in graphical/tabular form. Effects of different parameters are adequately discussed. Since the study takes care of thermal radiation in blood flow, the results reported here are likely to have an important bearing on the therapeutic procedure of hyperthermia, particularly in understanding/regulating blood flow and heat transfer in capillaries.

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Section: Heat Mass Transfer (2013) 49:617-628 621mentioning

confidence: 99%

“…Abe and Hiraoka [13], Molls [14], Chen and Roemer [15], Overgaard [16], Feldmann et al [17], Habash et al [18]). Deng et al [19] observed significant thermal effects in blood vessels during cryosurgery by means of infrared temperature mapping.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal radiation on MHD flow of blood and heat transfer in a permeable capillary in stretching motion

Misra

Sinha

2013

Heat Mass Transfer

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“…The initial temperature of cryoprobes is 10 °C and it decreases to -196 °C at a freezing rate of -9 °C/min. Typical thermophysical properties of biologic tissue are shown in Table 1 [11][12][13], where the subscripts of 1 and 2 represent tumor and normal tissue, respectively. Figures 3(a) to 3(d) shows the temperature distribution at a distance of 9 mm between two cryoprobes and freezing times of 200, 400, 600, and 800 s, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Initial condition (t = 0): T = T s0 at the cryoprobe tips (11) T =T 0 at 0 ≤ x ≤ W, 0 ≤ y ≤ B excluding the probe tips domain (12) Boundary condition (t > 0):…”

Section: Boundaries and Initial Conditions Are Shown As Followsmentioning

confidence: 99%

Numerical simulation on freezing phase change heat transfer in cryosurgery with two cryoprobes

Zhao

Chen

Shi

2011

Heat Trans. Asian Res.

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A mathematical model for phase change heat transfer in biological tissue (including tumor and normal tissue) embedded with two cryoprobes was established. In this model, the vascular architecture was described as a tree-like branched fractal network, and the effective thermal conductivity and flow rate of blood were presented based on this fractal structure. Occurrence of three regions including frozen, phasechanging, and unfrozen regions in biological tissue during the freezing process was also considered. The numerical studies on temperature distribution and ice crystal growth process in biological tissue embedded with two cryoprobes were performed. The results showed that the growth rate of ice crystal is more rapid in the initial freezing stage and becomes slower later. So it is unreasonable to prolong freezing time merely without other assisting measures for enlarging the freezing region in the late freezing stage. Furthermore, the placement distance of the two cryoprobes plays a significant role in the growth of ice crystal in the initial freezing stage, and the influence of different distances between two probes on ice crystal growth becomes less profound with an increasing of freezing time.

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“…Recently the study on thermal behavior of large blood vessels has attracted much attention in the cryosurgery area. Deng et al [ 5 ] adopted infrared thermography system to investigate the thermal effects of large vessels during cryosurgery based on simulation and animal experiments. The results showed that the heating nature of the flowing blood in the large vessels could produce steep temperature gradients and inadequate cooling to the frozen tissues.…”

Section: Introductionmentioning

confidence: 99%

Computational study of the effects of arterial bifurcation on the temperature distribution during cryosurgery

Zheng¹,

Wu²,

He³

et al. 2018

BioMed Eng OnLine

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BackgroundThermally significant blood flows into locally cooled diseased tissues and warm them during cryosurgery so that the iceball is often hard to cover the whole diseased volume. This paper is aimed at investigating the effects of large arterial bifurcation on the temperature distribution during cryosurgery through simulation method.MethodsA parametric geometry model is introduced to construct a close-to-real arterial bifurcation. The three-dimensional transient conjugate heat transfer between bifurcated artery and solid tissues with phase change during cryosurgery is performed by finite volume method.ResultsThe discussion was then made on the effects of the relative position between cryoprobe and artery bifurcation, the inlet velocity of root artery and the layout of multiple cryoprobes on the temperature distribution and iceball evolution. The results show that the thermal interaction between blood flow and iceball growth near bifurcation is considerable complex. The thermal effects of bifurcation could modulate the iceball morphology, severely weaken its freezing volume and prevent the blood vessel from being frozen.ConclusionThe present work is expected to be valuable in optimizing cryosurgery scheme of the situation that the bifurcated artery is embedded into the disease tissue.

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Disclosure of the significant thermal effects of large blood vessels during cryosurgery through infrared temperature mapping

Cited by 21 publications

References 26 publications

Effect of thermal radiation on MHD flow of blood and heat transfer in a permeable capillary in stretching motion

Effect of thermal radiation on MHD flow of blood and heat transfer in a permeable capillary in stretching motion

Numerical simulation on freezing phase change heat transfer in cryosurgery with two cryoprobes

Computational study of the effects of arterial bifurcation on the temperature distribution during cryosurgery

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