Document Detail


Role of blood flow on RF exposure induced skin temperature elevations in rabbit ears.
MedLine Citation:
PMID:  17004244     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this in vivo study, we measured local temperature changes in rabbit pinnae, which were evoked by radiofrequency (RF) exposure for 20 min at localized SAR levels of 0 (sham exposure), 2.3, 10.0, and 34.3 W/kg over 1.0 g rabbit ear tissue. The effects of RF exposures on skin temperature were measured under normal blood flow and without blood flow in the ear. The results showed: (1) physiological blood flow clearly modified RF induced thermal elevation in the pinna as blood flow significantly suppressed temperature increases even at 34.3 W/kg; (2) under normal blood flow conditions, exposures at 2.3 and 10.0 W/kg, approximating existing safety limits for the general public (2 W/kg) and occupational exposure (10 W/kg), did not induce significant temperature rises in the rabbit ear. However, 2.3 W/kg induced local skin temperature elevation under no blood flow conditions. Our results demonstrate that the physiological effects of blood flow should be considered when extrapolating modeling data to living animals, and particular caution is needed when interpreting the results of modeling studies that do not include blood flow.
Authors:
Fu Jia; Akira Ushiyama; Hiroshi Masuda; George F Lawlor; Chiyoji Ohkubo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioelectromagnetics     Volume:  28     ISSN:  0197-8462     ISO Abbreviation:  Bioelectromagnetics     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-03-20     Completed Date:  2007-04-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8008281     Medline TA:  Bioelectromagnetics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  163-72     Citation Subset:  IM    
Copyright Information:
(c) 2006 Wiley-Liss, Inc.
Affiliation:
Department of Environmental Health, National Institute of Public Health, 2-3-6 Minami, Wako-shi, Saitama 351-0197, Japan. jiafu_wulan@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Ear / blood supply*
Rabbits
Radio Waves*
Radiometry
Regional Blood Flow*
Skin Temperature / radiation effects*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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