Study type: Medical/biological study (experimental study)

Cellular phone use does not acutely affect blood pressure or heart rate of humans. med./bio.

Published in: Bioelectromagnetics 2004; 25 (2): 73-83

Aim of study (acc. to author)

To measure heart rate and blood pressure during and after a 35 min radiofrequency exposure for the two European cellular phone operational frequencies (900 and 1800 MHz).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 35 min
Exposure 2: 1,800 MHz
Modulation type: pulsed
Exposure duration: continuous for 35 min

General information

Subjects attended two sessions, 1 week apart, each lasting 2 h, with 35-min RF and sham exposure to either 900 or 1800 MHz cellular phones, in double randomized, double blind, crossover design.

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration continuous for 35 min
Modulation
Modulation type pulsed
Exposure setup
Exposure source
Chamber The experiments were carried out in a quiet laboratory with a well-regulated temperature (21-23°C) and relative humidity (35-45%).
Setup A PC-controlled, dual band mobile phone and an identical but inactive phone were located on a plastic head helmet. The active phone was leaning to the ear on the dominant hand side of the head and the inactive phone was leaning to the ear on the non-dominant hand side.
Parameters
Measurand Value Type Method Mass Remarks
power 2 W - - - -
SAR 1.58 W/kg maximum measured - using a head phantom

Exposure 2

Main characteristics
Frequency 1,800 MHz
Type
Exposure duration continuous for 35 min
Modulation
Modulation type pulsed
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 1 W - - - -
SAR 0.7 W/kg maximum measured - using a head phantom

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

The findings of this randomized, double-blind study, placebo controlled crossover study indicate that exposure to a cellular phone, using 900 MHz or 1800 MHz (compared to sham exposure) with maximal allowed antenna powers, does not acutely change arterial blood pressure and heart rate, during or after the 35 min exposure. There were no differences in the subjective symptoms reported by the subjects between exposure and sham exposure.

Study character:

Study funded by

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