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Research Papers

Evaluation of an Interstitial Cooling Device for Carotid Arterial Cooling Using a Tissue Equivalent Gel Phantom

[+] Author and Article Information
Anilchandra Attaluri

Department of Mechanical Engineering, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250

Zhongping Huang

Department of Mechanical Engineering, Widener University, Chester, PA 19013

Liang Zhu1

Department of Mechanical Engineering, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250zliang@umbc.edu

1

Corresponding author.

J. Thermal Sci. Eng. Appl 2(1), 011007 (Sep 09, 2010) (5 pages) doi:10.1115/1.4002196 History: Received March 11, 2010; Revised June 23, 2010; Published September 09, 2010; Online September 09, 2010

In this study, we build and test a prototype of an interstitial cooling device in a tissue-equivalent gel phantom mimicking the human neck. The effectiveness of the device is measured by the capability of delivering a coolant temperature of lower than 5°C at the entrance of the device and the measured temperature decay along a glass tube filled with water circulating at a speed similar to that in the carotid artery. The experimental study has identified a cooling prototype design, which is capable of inducing sufficient temperature reduction along the common carotid artery. It also tests how easy to handle the device to ensure a close physical contact between the device and the glass tube. A 5°C coolant temperature can be delivered at the device entrance when using above 0°C coolant in the reservoir. The surface temperature of the device is found almost uniform. Despite its limitations, the experimental results agree generally with previous theoretical predictions. The 8 cm long and 3 cm wide device with a coolant temperature lower than 10°C is capable of inducing a temperature reduction of at least 2.5°C along the glass tube filled with water circulating at 240 ml/min. For higher water flow rates, one needs to increase the length of the device and/or lower the coolant temperature to achieve similar temperature decays along the glass tube.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

A prototype of the cooling device made of polyethylene sheet and Teflon tubes

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Figure 2

Tissue equivalent agarose gel in a cylindrical container mimicking the human neck

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Figure 3

Experimental setup consisting of a water reservoir, a pump, a cylindrical gel block, a glass tube, a circulator, a cooling device, and connecting tubes. Several thermocouples are used to measure temperature changes along the glass tube and in the cooling device.

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Figure 4

Recorded temperature measurements at various measuring sites

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Figure 5

Temperature reductions along the glass tube for the cooling devices of 2 cm and 3 cm in width. The flow rate is 240 ml/min.

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Figure 6

The effect of the water flow rate in the glass tube on the temperature reduction along the tube

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