Zwitserland: Invloed UMTS EMV op bloedcirculatie hersenen en hartritme.
dinsdag, 28 juni 2011 - Categorie: Onderzoeken
Bron:Bioelectromagnetics 21 juni 2011 doi: 10.1002/bem.20682
Assessment of intermittent UMTS electromagnetic field effects on blood circulation in the human auditory region using a near-infrared system.
Spichtig S, Scholkmann F, Chin L, Lehmann H, Wolf M.
Biomedical Optics Research Laboratory, Division of Neonatology, Department of Obstetrics and Gynecology, University Hospital Zurich, Zurich, Switzerland;
Institute for Biomedical Engineering, Swiss Federal Institute of Technology, Zurich, Switzerland. email@example.com.
The aim of the present study was to assess the potential effects of intermittent Universal Mobile Telecommunications System electromagnetic fields (UMTS-EMF) on blood circulation in the human head (auditory region) using near-infrared spectroscopy (NIRS) on two different timescales: short-term (effects occurring within 80?s) and medium-term (effects occurring within 80?s to 30?min).
For the first time, we measured potential immediate effects of UMTS-EMF in real-time without any interference during exposure. Three different exposures (sham, 0.18?W/kg, and 1.8?W/kg) were applied in a controlled, randomized, crossover, and double-blind paradigm on 16 healthy volunteers. In addition to oxy-, deoxy-, and total haemoglobin concentrations (O(2) Hb, HHb, and tHb, respectively), the heart rate (HR), subjective well-being, tiredness, and counting speed were recorded.
During exposure to 0.18?W/kg, we found a significant short-term increase in ?O(2) Hb and ?tHb, which is small (?17%) compared to a functional brain activation.
A significant decrease in the medium-term response of ?HHb at 0.18 and 1.8?W/kg exposures was detected, which is in the range of physiological fluctuations.
The medium-term ?HR was significantly higher (+1.84?bpm) at 1.8?W/kg than for sham exposure. The other parameters showed no significant effects.
Our results suggest that intermittent exposure to UMTS-EMF has small short- and medium-term effects on cerebral blood circulation and HR.
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