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Journal of Biomedical Optics • Open Access

Use of intracranial and ocular thermography before and after arteriovenous malformation excision
Author(s): Peter Y. K. Hwang; Philip M. Lewis; Jerome J. Maller

Paper Abstract

Excision of arteriovenous malformations (AVMs) is known to carry a risk of postoperative hemorrhage, postulated to be the result of normal perfusion pressure breakthrough. It is also possible that AVMs may cause a steal effect, reducing perfusion in nearby vessels. There is currently no simple method of visualizing the presence or absence of steal effect intraoperatively. We hypothesized that the infrared thermographic (heat sensitive) imaging of perilesional brain may be useful for detecting reduced perfusion due to steal. Moreover, we hypothesized that if steal effect was present, it could impact on ocular perfusion and thereby temperature. Our objective was, therefore, to investigate whether perilesional cortical and ocular temperature (OT) may be a marker of steal effect. We intraoperatively acquired conventional and thermal images of the surgical field and eyes bilaterally, pre- and post-excisions of a large left hemisphere AVM. We found OT asymmetry preoperatively, which was absent after the AVM was excised. Intraoperative thermal images showed an increase of perilesional temperature, although this could be confounded by generalized changes in cortical perfusion due to anesthetics or surgery.

Paper Details

Date Published: 18 November 2014
PDF: 3 pages
J. Biomed. Opt. 19(11) 110503 doi: 10.1117/1.JBO.19.11.110503
Published in: Journal of Biomedical Optics Volume 19, Issue 11
Show Author Affiliations
Peter Y. K. Hwang, Alfred Health (Australia)
Monash Univ. (Australia)
Philip M. Lewis, Alfred Health (Australia)
Monash Univ. (Australia)
Jerome J. Maller, Alfred Health (Australia)
Monash Univ. (Australia)

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