Study type: Medical/biological study (experimental study)

No effect of 85 mT permanent magnets on laser-Doppler measured blood flow response to inspiratory gasps. med./bio.

Published in: Bioelectromagnetics 2005; 26 (4): 331-335

Aim of study (acc. to author)

To investigate whether a local static magnetic field of a permanent magnet influences the amount of skin blood flow reductions induced by deep inspirations.

Background/further details

A single rapid and deep inspiration induces arteriolar vasoconstriction that causes a transient decrease in skin blood flow.



Exposure Parameters
Exposure 1:
Exposure duration: 20 min

Exposure 1

Main characteristics
Exposure duration 20 min
Exposure setup
Exposure source
  • ceramic magnet, 37 mm in diameter x 14 mm thick
Setup magnet was placed under the middle finger of one hand with south pole facing the skin
Sham exposure A sham exposure was conducted.
Measurand Value Type Method Mass Remarks
magnetic flux density 85 mT unspecified measured - at the center of the magnet
magnetic flux density 31.5 mT unspecified cf. remarks - ± 1.1 mT; measured at the skin blood flow measurement site on the finger dorsum

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Results showed no significant difference in either vasoconstrictive responses or skin temperature due to the static magnetic field of the permanent magnet.

Study character:

Study funded by

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