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Local vasodilator response to mobile phones
P Paredi1, S A Kharitonov, T Hanazawa
1Department of Thoracic Medicine, Imperial College School of Medicine at the National Heart and Lung Institute, London, UK.
The Laryngoscope
|February 24, 2001
Summary
Mobile phone use increases skin temperature and nasal resistance, with potential biological effects from electromagnetic fields (EMF). Further research is needed to understand long-term impacts and mechanisms.
Area of Science:
- Environmental Health
- Biophysics
- Physiology
Background:
- Public concern exists regarding potential health risks from electromagnetic fields (EMF) emitted by mobile phones.
- Heat generation and nitric oxide (NO) synthase activation are hypothesized biological effects of EMF exposure.
Purpose of the Study:
- To investigate the impact of mobile phone conversations on skin temperature, nasal NO levels, and nasal resistance.
- To determine if EMF exposure from mobile phones induces measurable physiological changes.
Main Methods:
- Eleven healthy subjects participated in a 30-minute mobile phone conversation.
- Measurements included skin temperature, nasal NO (chemiluminescence), and nasal minimal cross-sectional area (MCA) via rhinometry.
- Effects were compared with and without an earpiece to isolate EMF exposure.
Main Results:
- A significant increase in skin temperature and a tendency for higher nasal NO levels were observed on the side of the phone.
- Nasal minimal cross-sectional area (MCA) significantly decreased during mobile phone use.
- These changes were not observed when using an earpiece, and opposite-side MCA increased.
Conclusions:
- Mobile phone EMF exposure elicits measurable biological effects, including increased skin temperature and reduced nasal airflow.
- Microwave exposure may lead to vasodilation and decreased nasal MCA.
- Further investigation is required for long-term effects and the interplay of NO, vasodilation, and temperature.