Analysis of the distribution of flowing erythrocytes in a model vessel under an inhomogeneous magnetic field |
| |
Authors: | A Seiyama Nobuji Maeda Takeshi Shiga |
| |
Institution: | (1) 1st Department of Physiology, Osaka University Medical School, 2-2 Yamadaoka, Suita, Osaka 565, Japan Fax: +81-6 879 3628, JP;(2) 2nd Department of Physiology, School of Medicine, Ehime University, Shigenobu, Onsen-gun, Ehime 791-02, Japan, JP |
| |
Abstract: | Changes in the distribution of flowing erythrocytes in a straight cylinder were studied under an inhomogeneous magnetic field.
The magnetic field was applied perpendicular to a cylinder, which had a 90° side vessel at the end (oriented towards the magnetic
field) to detect changes in the erythrocyte distribution within the cylinder. (1) The attraction of paramagnetic erythrocytes
by the magnetic field was demonstrated by an increase in the concentration (or number) of erythrocytes drawn into the side
vessel. The flow of diamagnetic, oxygenated erythrocytes was unaffected. (2) The degree of attraction of the paramagnetic
erythrocytes was proportional to ``(magnetic susceptibility)' and to ``(magnetic flux density) × (magnetic field gradient)'
up to 10 T2/m, but it saturated at high magnetic field. The onset of the saturation depended on the magnetic susceptibility of the erythrocytes.
(3) The degree of attraction depended on the hematocrit of the flowing erythrocyte suspension, with a maximum value at a low
hematocrit. These phenomena are explained on the basis of the balance between the paramagnetic attractive force of the magnetic
field and the collision rate between erythrocytes.
Received: 2 May 1996 / Accepted: 1 July 1996 |
| |
Keywords: | Magnetic susceptibility Paramagnetic erythrocyte Inhomogeneous magnetic field Magnetic attraction |
本文献已被 SpringerLink 等数据库收录! |
|