ENG  Vol.4 No.10 , October 2012
Infra-red Thermal Imaging of the Inner Canthus: Correlates with the Temperature of the Injured Human Brain
Abstract

Introduction: Infra-red (IR) thermometry is a safe and valid method to determine internal and surface temperature in human subjects. Under conditions of brain damage (head injury or stroke) knowledge of changes in the temperature of intracranial tissue is justified because of the vulnerability of neurons to accelerated damage at temperatures at the upper end of the febrile range. Aim: To determine the temperature at the inner canthus (IC) of the eye as a potential surrogate for brain temperature. Methods: Invasive monitoring of deep brain structures, lateral ventricle and deep white matter. IR temperature readings obtained at right and left IC. Results:  Strong correlations were evident between R and L IC and brain. Close, as well as poor, agreement between   sites was shown in some patients and at some times. For right hemispheric lesions four had a better correlation between TbrV and TRIC when compared to TLIC.  When the correlation between TbrV and TLIC was better compared to TbrV and TRIC, four had a predominant right hemispheric lesion. Conclusions: Improved techniques for IR thermal imaging accuracy at the bedside has the potential to improve temperature measurement agreement. The predominant lesion side may have a bearing on maximum ipsilateral IC temperature Further studies are ongoing in this pilot study population.


Cite this paper
C. Childs, M. Zu, A. Wai, Y. Tsai, S. Wu and W. Li, "Infra-red Thermal Imaging of the Inner Canthus: Correlates with the Temperature of the Injured Human Brain," Engineering, Vol. 4 No. 10, 2012, pp. 53-56. doi: 10.4236/eng.2012.410B014.
References

[1]   Childs, C., Human brain temperature: regulation, measurement and relationship with cerebral trauma: Part 1. British Journal of Neurosurgery, 2008. 22(4): p. 486-496.

[2]   Graf, W., Patterns of human liver temperature. Acta Physiologica Scand, 1959. 46(suppl (160)): p. 38-90.

[3]   Romanovsky, A.A. and M. Szekely, Fever and hypothermia:two adaptive thermoregulatory responses to systemic inflammation. Medical Hypotheses, 1998. 50: p. 219-226.

[4]   Busto, R., et al., Effect of mild hypothermia in ischaemic-induced release of neurotransmitters and free fatty acids in rat brain. Stroke, 1989. 20: p. 904-910.

[5]   Childs, C., et al., Differences between brain and rectal temperature during routine critical care of patients with severe traumtic brain injury. Anaesthesia, 2005. 60(759-765).

[6]   Childs, C., et al., Report of a consensus meeting on human brain temperatureafter severe traumatic brain injury: its measurement and managementduring pyrexia. Frontiers in Neurotrauma, 2010. 1(146): p. Published online 2010 November 23. doi: 10.3389/fneur.2010.00146.

[7]   Kirk, D., et al., Infra-red thermometry: the reliability of tympanic and temporal artery readings fro predicting brain temperature after severe traumatic brain injury. Critical Care, 2009. in press.

[8]   Teunissen, L.P.J. and H.A.M. Daanen, Infrared thermal imaging of the inner canthus of the eye as an estimator of body core temperature. J. Medical Engineering & technology, 2011. 35(3-4): p. 134-138.

[9]   Erdogmus, S. and F. Govsa, Arterial features of inner canthus region: confirming the dafety for the flap region. The journal of craniofacial surgery, 2006. 17(5): p. 864-868

 
 
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