Local vasodilator response to mobile phones.
Paredi P, Kharitonov SA, Hanazawa T, Barnes PJ. · 2001
View Original AbstractCell phones cause measurable tissue heating and blood vessel changes within minutes of use, effects prevented by using earpieces.
Plain English Summary
Researchers measured biological changes in 11 healthy adults during 30-minute cell phone calls using 900 MHz phones. They found significant increases in skin temperature (up to 2.3°C), reduced nasal airway space (27% decrease), and elevated nitric oxide levels on the side of the head where the phone was held. These effects disappeared when participants used earpieces instead of holding phones directly against their heads.
Why This Matters
This study demonstrates that cell phone radiation produces measurable biological effects within minutes of exposure. The researchers documented clear vascular changes including increased skin temperature and altered blood vessel function in the nasal passages. What makes this research particularly compelling is the control design - effects only occurred on the side of the head where the phone was held, and disappeared completely when earpieces were used. The science demonstrates that RF radiation at levels produced by mobile phones can trigger immediate physiological responses in human tissue. While the study focused on short-term effects, these vascular changes raise important questions about what happens with years of daily cell phone use pressed against our heads.
Exposure Information
Specific exposure levels were not quantified in this study. The study examined exposure from: 900 MHz Duration: 30 minutes
Study Details
We investigated if a mobile telephone conversation can modify skin temperature, NO, and nasal resistance.
We studied the effect of an EMF (900 MHz) generated by a commercially available cellular phone durin...
There was a similar and significant increase in skin temperature of the nostril and occipital area o...
Exposure to EMF produced by a mobile phone produces biological effects that can be easily measured. Microwaves may increase skin temperature and therefore cause vasodilation and reduce MCA. Further studies are needed to study the long-term effects of mobile phone use and the relation among NO production, vasodilation, and temperature.
Show BibTeX
@article{p_2001_local_vasodilator_response_to_2253,
author = {Paredi P and Kharitonov SA and Hanazawa T and Barnes PJ.},
title = {Local vasodilator response to mobile phones.},
year = {2001},
url = {https://pubmed.ncbi.nlm.nih.gov/11192886/},
}