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Research Papers

Therapeutic Equipment for Brain-Hyperthermia Using Convective Spray Cooling

[+] Author and Article Information
Imran Mahmood

Department of Mechatronics and
Control Engineering,
University of Engineering and Technology,
Lahore 54890, Pakistan
e-mail: imran.mahmood@uet.edu.pk

Ali Raza

Department of Mechatronics and
Control Engineering,
University of Engineering and Technology,
Lahore 54890, Pakistan
e-mail: aliraza@uet.edu.pk

1Corresponding author.

Manuscript received October 22, 2016; final manuscript received April 7, 2017; published online June 27, 2017. Assoc. Editor: Matthew R. Myers.

J. Med. Devices 11(3), 031010 (Jun 27, 2017) (11 pages) Paper No: MED-16-1345; doi: 10.1115/1.4036652 History: Received October 22, 2016; Revised April 07, 2017

A new type of therapeutic equipment is designed herein, using concepts of convective heat transfer and spray cooling, to treat patients suffering from brain-hyperthermia. The equipment is aimed to provide emergency treatment in order to prevent disability or possible mortality because thermoregulatory system of the patients fails to maintain a homeostasis. The equipment uses noncontact method of forced convection, applied uniformly at body exteriors. The heat exchanger is designed to contain four independent pipe-sections with orifice openings around the body. The cool-air, maintained within ASHRAE’s thermal comfort bounds, is sprayed through the orifices. Design improvements have been made on the basis of image analysis of the flow. The boundary layer (BL) analysis has also been performed over a specially designed mannequin with induced hyperthermia characteristics. The testing indicates a decay of ∼6 °C in 280 min with a time constant of 2 h. Comparative to existing techniques, in addition to being a noncontact approach, the equipment shows better thermoregulatory performance along with a flexibility to accommodate different body contours.

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Figures

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Fig. 1

Three-node mannequin skin model

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Fig. 2

Mannequin’s working fluid assembly

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Fig. 3

Setup for air supply and visual analysis with different orifices

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Fig. 4

Experimental setup with cool-air supply and distribution assembly

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Fig. 5

Boundary layer analysis over the head surface

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Fig. 6

Boundary layer analysis over the chest and upper abdomen surfaces

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Fig. 7

Boundary layer analysis over the lower abdomen and thighs surfaces

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Fig. 8

Boundary layer analysis over the legs surface

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Fig. 9

Therapeutic equipment active cooling results

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