NDLI: Influences of Hypothermia on the Cortical Blood Supply by Laser Speckle Imaging

Content Provider	IEEE Xplore Digital Library
Author	Minheng Li Peng Miao Jing Yu Yihong Qiu Yisheng Zhu Shanbao Tong
Copyright Year	2001
Abstract	Induced hypothermia has been broadly applied in neurological intensive care unit (NICU). Meanwhile, accidental hypothermia is also a threatening condition in daily life. It is meaningful to investigate the influences of temperature change on the cerebral blood flow (CBF). In the present study, temporal laser speckle image contrast analysis (tLASCA) was implemented to study the relative CBF change in cerebral artery, vein and capillary level under mild (35degC) and moderate (32degC) hypothermia. Twelve male Sprague-Dawley rats (300 plusmn 50 g) were anesthetized with sodium pentobarbital and randomly assigned to mild and moderate hypothermia groups (n = 9 each). Laser speckle imaging (LSI) trials were acquired from baseline (37degC), hypothermia (35degC or 32degC), and post-rewarming (37degC) phases. In the mild group, mean CBF in different vessels all increased throughout the hypothermic and post-rewarming phases. On the contrary, mean CBF reduced by 10%-20% at 32degC and returned to ~ 95% of the baseline level during the post-rewarming session in the moderate group. Besides, in the moderate group, a CBF rebound in vein was found in the post-rewarming phase. Our results suggested that the CBF changed differently between mild and moderate hypothermia, which may be worth for further study in clinic. And we demonstrated LSI as a promising method to achieve high spatiotemporal resolution CBF change with minimal invasion.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	7
File Size	2324113
Starting Page	128
Ending Page	134
File Format	PDF
ISSN	15344320
Volume Number	17
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Speckle Laser modes Veins Large scale integration Temperature Blood flow Laser transitions Image analysis Arteries Rats moderate hypothermia Cerebral blood flow (CBF) laser speckle imaging (LSI) mild hypothermia
Content Type	Text
Resource Type	Article
Subject	Neuroscience Rehabilitation Internal Medicine Biomedical Engineering Computer Science Applications

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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