An optical telemetry technique was developed which enables us to evaluate physiological responses non-invasively without restraining the subject. The change in diameters of peripheral blood vessels is measured as the change in transmitted intensity of infra-red light across an ear auricle. The signal is transmitted to a remote place using infra-red light diffusely reflected from a ceiling and walls of a room. After the feasibility of this technique was verified with various stress-responses, it was applied to the study of biological effects of electromagnetic fields. A rabbit was exposed to a strong electric field, and the change in its peripheral circulation was detected with this technique. Different field strengths were applied from 5 kV/m - 100 kV/m. Both contraction and dilation of peripheral blood vessels were detected on the exposure to electric fields. The threshold level of the field strength to cause the response was analyzed.
|ジャーナル||IEEE International Symposium on Electromagnetic Compatibility|
|出版ステータス||Published - 1994 12 1|
|イベント||Proceedings of the 1994 International Symposium on Electromagnetic Compatibility - Miyagi, Jpn|
継続期間: 1994 5 16 → 1994 5 20
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering