| Project/Area Number |
01870008
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
環境生理学(含体力医学･栄養生理学)
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| Research Institution | Kanazawa University |
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Principal Investigator |
NAGASAKA Tetsuo Kanazawa University School of Medicine Professor, 医学部, 教授 (80023646)
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| Co-Investigator(Kenkyū-buntansha) |
SAITOU Takeo Biomedical Science Co. Ltd., PRESIDENT, 技術部開発課, 代表取締役
TANABE Minoru Kanazawa University School of Medicine, Instructor, 医学部, 助手 (20217110)
SAKURADE Sohtaro Kanazawa University School of Medicine, Instructor, 医学部, 助手 (00215691)
紫藤 治 金沢大学, 医学部, 助教授 (40175386)
斉藤 健夫 バイオメディカルサイエンス社, 代表取締役
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| Project Period (FY) |
1989 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1991: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1990: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1989: ¥4,800,000 (Direct Cost: ¥4,800,000)
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| Keywords | tympanic temperature / infrared ray / without physiol contact / thermopile / hyperthermia / selective brain cooling |
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| Research Abstract |
The purpose of this study was to design a conventional device for accurate measurement of tympanic temperature without physical'contact, with which one can explores mechanisms of selective brain cooling of the humans exposed to hot-humid environments. 1. Designing an infrared device for tympanic temperature measurement. This device detects infrared ray emitted from the tympanic membrane, which is directly related to the tympanic temperature. We have first attempted to build a device using infrared optic fibers with which the infrared ray will be collected and detected by the sensor located outside the auditory canal. However, this device was greatly influenced even by a small change of canal temperature, then we have discarded and revised the device. The newly designed device consisted of (1) infrared sensor, a. a fine thermopile consisted of 56 pairs of thermocouples. b. outer holder and c. protecting cover. 2. Validity of the device. Tests were repeated in vitro using a model of the
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skin and using actual tympanic membrane of human subjects. The tests confirmed that the device has a rapid response time and was able to reach a 95% of the maximum value within several seconds. However, the amount of output signals varied if the distance of tympanic membrane and the temperature sensor changed. 3. Comparison with a contact thermometer. Tympanic temperatures in both sides were measured, one by this device and another by a thermistor of direct contact with the tympanic membrane. There was a good correlation between the values measured by the two devices at a thermoneutral ambient temperature without any detectable wind. When the face was fanned in a warm condition. however, this. device indicated'lower values compared with those recorded by the contact device. We thus conclude that in its current form the designed temperature sensor may not yet be used under the conditions where air temperature around the head changes to a great extent, and a further revision will be needed before actual use. Less
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