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Radio Frequency

Role of blood flow on RF exposure induced skin temperature elevations in rabbit ears.

No Effects Found

Jia F, Ushiyama A, Masuda H, Lawlor GF, Ohkubo C. · 2007

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Physiological blood flow significantly suppressed RF-induced temperature increases in rabbit ears even at 34.3 W/kg, while 2.3 and 10.0 W/kg did not cause significant temperature rises under normal blood flow conditions.

Plain English Summary

Summary written for general audiences

Researchers measured local temperature changes in rabbit pinnae during 20-minute RF exposures at SAR levels of 0, 2.3, 10.0, and 34.3 W/kg under normal blood flow and without blood flow. Blood flow significantly suppressed temperature increases even at 34.3 W/kg, while 2.3 and 10.0 W/kg did not induce significant temperature rises under normal blood flow conditions. However, 2.3 W/kg induced local skin temperature elevation when blood flow was absent. The authors concluded that physiological blood flow effects should be considered when extrapolating modeling data to living animals.

Exposure Details

SAR
0, 2.3, 10, and 34.3 W/kg
Exposure Duration
20 minutres

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kg

Study Details

The aim of this study is to investigate Role of blood flow on RF exposure induced skin temperature elevations in rabbit ears.

In this in vivo study, we measured local temperature changes in rabbit pinnae, which were evoked by ...

The results showed: (1) physiological blood flow clearly modified RF induced thermal elevation in th...

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.

Cite This Study
Jia F, Ushiyama A, Masuda H, Lawlor GF, Ohkubo C. (2007). Role of blood flow on RF exposure induced skin temperature elevations in rabbit ears. Bioelectromagnetics.28(3):163-172,2007.
Show BibTeX
@article{f_2007_role_of_blood_flow_3114,
  author = {Jia F and Ushiyama A and Masuda H and Lawlor GF and Ohkubo C.},
  title = {Role of blood flow on RF exposure induced skin temperature elevations in rabbit ears.},
  year = {2007},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/17004244/},
}
PubMed: 17004244

Cited By (9 papers)

Quick Questions About This Study

The study aimed to investigate the role of blood flow on RF exposure induced skin temperature elevations in rabbit ears.
Researchers tested RF exposures at SAR levels of 0, 2.3, 10.0, and 34.3 W/kg for 20 minutes.
Physiological blood flow significantly suppressed temperature increases even at 34.3 W/kg, while 2.3 and 10.0 W/kg did not cause significant rises under normal blood flow.
Without blood flow, 2.3 W/kg induced local skin temperature elevation.
The authors concluded that physiological blood flow effects should be considered when extrapolating modeling data to living animals, and caution is needed when interpreting modeling studies that omit blood flow.