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Local vasodilator response to mobile phones.

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Paredi P, Kharitonov SA, Hanazawa T, Barnes PJ · 2001

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A 30-minute mobile phone call significantly increased skin temperature on the exposed side and reduced the nasal minimal cross-sectional area, and these effects were not seen when an earpiece was used.

Plain English Summary

Summary written for general audiences

Researchers exposed eleven healthy adults to a 900 MHz mobile phone for 30 minutes and measured skin temperature, nasal nitric oxide, and nasal minimal cross-sectional area. On the side of the phone, skin temperature rose significantly by 2.3°C at 6 minutes, nasal nitric oxide tended to increase by 12.9% at 10 minutes, and minimal cross-sectional area decreased by 27% at 15 minutes. These changes were absent when an earpiece was used, and the opposite side showed no temperature or nitric oxide change but a 38% increase in minimal cross-sectional area.

Why This Matters

The study aimed to determine whether a mobile telephone conversation could alter skin temperature, nitric oxide, and nasal resistance. The authors concluded that mobile phone EMF produces measurable biological effects, suggesting microwaves may raise skin temperature and cause vasodilation that reduces the nasal cross-sectional area. They recommended further research on long-term mobile phone use and the interplay among nitric oxide production, vasodilation, and temperature.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 900 MHz Duration: 30-minute telephone conversation

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.

Cite This Study
Paredi P, Kharitonov SA, Hanazawa T, Barnes PJ (2001). Local vasodilator response to mobile phones. Laryngoscope 111(1):159-162, 2001.
Show BibTeX
@article{p_2001_local_vasodilator_response_to_1697,
  author = {Paredi P and Kharitonov SA and Hanazawa T and Barnes PJ},
  title = {Local vasodilator response to mobile phones.},
  year = {2001},
  doi = {10.1097/00005537-200101000-00027},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1097/00005537-200101000-00027},
}
DOI: 10.1097/00005537-200101000-00027

Cited By (48 papers)

Quick Questions About This Study

The study investigated whether a mobile telephone conversation could modify skin temperature, nasal nitric oxide, and nasal resistance.
On the same side as the phone, skin temperature increased significantly by 2.3°C at 6 minutes, nasal nitric oxide tended to increase by 12.9% at 10 minutes, and the minimal cross-sectional area decreased by 27% at 15 minutes.
When an earpiece was used to avoid direct electromagnetic field exposure, the changes in skin temperature, nitric oxide, and minimal cross-sectional area were not recorded.
On the opposite side, skin temperature and nasal nitric oxide did not change, but the minimal cross-sectional area increased significantly by 38%.