Influence of linearly polarized near-infrared irradiation on deformability of human stored erythrocytes.
OBJECTIVE
To investigate the influence of linearly polarized near-infrared irradiation using the Super Lizer trade mark on deformability of human erythrocytes.


BACKGROUND
Not only low-powered laser but also linearly polarized near-infrared beams have some biostimulation effects on various tissues. There were some reports of erythrocyte deformability improved by low-powered He-Ne laser irradiation.


METHODS
Human erythrocyte samples stored for three weeks were adjusted to 30% hematocrit. Erythrocyte deformability presented as the filter filtration rate was measured.


RESULTS
There was no difference of the filter filtration rate between control group without irradiation and the group of 125 mJ/cm(2) exposure level at a wavelength of 830 nm. However, the groups of 625 and 1,250 mJ/cm(2) exposure levels at a wavelength of 830 nm showed higher filter filtration rates compared to the control group.


CONCLUSIONS
Linearly polarized near-infrared irradiation in a range of 625-1,250 mJ/cm(2) exposure level at a wavelength of 830 nm improved deformability of human stored erythrocytes.
Yokoyama
Kozo
K
Department of Anesthesia, Kagoshima University Dental School Hospital, Sakuragaoka 8-35-1, Kagoshima 890-8544, Japan. yoko@dentc.hal.kagoshima-u.ac.jp
Sugiyama
Kazuna
K
D001793:Blood Preservation; D004907:Erythrocyte Deformability / Q000528:radiation effects*; D006801:Humans; D007834:Lasers; D011829:Radiation Dosage