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BASIC RESEARCH FOR VISIBLE LASER UNIT FOR THE SPINAL CORD (A PRELIMINARY REPORT) Taihei Egashira 1,2 , Yoshihiko Yoshii 1 , Yutaka Maki 1 1Department of Neurological Surgery, School of Medicine, The University of Tsukuba 2Department of Neurosurgery, Kensei Sohgoh Hospital pp.373-377
Published Date 1983/4/1
DOI https://doi.org/10.11477/mf.1406205106
  • Abstract
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The cat's spinal dorsal column was irradiated unilaterally with Ar. laser of which power out-put was 500 mW and the spot size was 2 mm in diameter. The somatosensory evoked potentials (S. E. P.) were recorded bilaterally.

In other cats, the fluorescein was injected intra-venously for photoactivation and the dorsal column was irradiated with Ar. laser. The conclu-sion can be summerized as follows :

1) When the small demarcated area was made in the surface of the dorsal column by Ar. laser-irradiation, the early component of S. E. P. was disappeared. The histological finding revealed the destruction of the irradiated dorsal column.

2) The photoactivation effect of Ar. laser was demonstrated in the spinal cord, by using a fluo-rescein drug. The S. E. P. and the histological finding were the same as those of the nonfluore-scein drug group.

3) The S. E. P. was available for the concept of the Laser-Photo-Biological-Effect (L. P. B. E.)


Copyright © 1983, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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