ID Number		627
Study Type		Human / Provocation
Model		900 MHz (GSM) exposure to human volunteers and analysis of physiologic parameters that might explain reported subjective symptoms
Details		Human volunteers (n = 11) were exposed to a 900 MHz GSM (Motorola Star Tac 130) phone for 30 minutes and analyzed for skin temperature, respiratory air flow, respiratory NO levels, and nasal cavity dimensions. After 6 minutes, a 2.3 degree C skin temperature rise on the nostril and occipital area was recorded. The investigators also reported a decrease in air flow through the nose as measured by rhinometry on the side of the face the phone was held against, and suggested this might be a result of dilated blood vessels. Use of the cellular telephone also caused small increases in respiratory NO, although none of the increases was statistically significant. All changes returned to normal 5 minutes after cell phone exposure was terminated. The authors further suggested that dilated blood vessels might also account for reports of headaches while using cell phones.
Findings		No Effects
Status		Completed With Publication
Principal Investigator		Imperial College, London, UK
Funding Agency		Private/Instit.
Country		ITALY
References		Paredi, P et al. Laryngoscope, (2001) 111:159-162
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