Study type: Medical/biological study (experimental study)

Cutaneous microcirculation is not altered by a weak 50 Hz magnetic field. med./bio.

Published in: Biomed Tech (Berl) 2005; 50 (1-2): 14-18

Aim of study (acc. to author)

To study whether cutaneous microcirculation may be influenced by weak alternating magnetic fields in the magnitude of everyday life.

Background/further details

In seven healthy volunteers and in three persons convinced to suffer from electromagnetic hypersensitivity the microcirculation of the right thumb was determined.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: intermittent, 25 min field on, 25 min field off (50 min)
Exposure 2: 50 Hz
Exposure duration: intermittent, 5 min field on, 5 min field off for 50 min

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Waveform
  • unspecified
Polarization
  • circular
Exposure duration intermittent, 25 min field on, 25 min field off (50 min)
Additional info Magnetic field was circularly polarized
Exposure setup
Exposure source
Setup subjects laid on the bed placed within the triangular coil structure; the right arm of the subject was placed at heart level and the thumb was positioned in the center of the magnetic field by putting the hand on a special splint.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 96 µT unspecified measured - in the center of the coils

Exposure 2

Main characteristics
Frequency 50 Hz
Type
Waveform
  • unspecified
Exposure duration intermittent, 5 min field on, 5 min field off for 50 min
Additional info Magnetic field was circularly polarized
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 96 µT unspecified measured - in the center of the coils

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The magnetic field exposure did not influence cutaneous microcirculation of the thumb in healthy volunteers and in persons suffering from self-reported electromagnetic hypersensitivity. It was possible to produce significant changes of laser-Doppler-flow by both reactive hyperemia and hyperventilation independently from field status.

Study character:

Study funded by

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