Study type: Medical/biological study (experimental study)

A blood-oxygenation-dependent increase in blood viscosity due to a static magnetic field med./bio.

By: Yamamoto T, Nagayama Y, Tamura M
Published in: Phys Med Biol 2004; 49 (14): 3267-3277
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Aim of study (acc. to author)

To study the mechanisms of the magnetic influences on blood viscosity, the time for blood to fall through a glass capillary inside and outside a 1.5 T magnet resonance (MR) scanner was measured.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Exposure duration: 35 min for each sample, repeated 8 times

Exposure 1

Main characteristics
Frequency
Type
Exposure duration 35 min for each sample, repeated 8 times
Additional info Static magnetic field
Exposure setup
Exposure source
Setup The water bath containing the probe was placed 1) at the center of the MR scanner and 2) outside the MR scanner
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 1.5 T unspecified unspecified - inside the magnetic field of the MR scanner
magnetic flux density 1 mT maximum unspecified - outside the magnetic field of the MR scanner

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

The data showed that the blood viscosity significantly increased in a 1.5 T MR scanner. The blood viscosity increased depending on blood oxygenation, i.e. the increase in blood viscosity of deoxygenated blood was greater than that of oxygenated blood.
Thus, the results suggest that a 1.5 T magnetic field may modulate blood flow.

Study character:

Study funded by