| In-flight cerebral oxygen status: continuous monitoring by near-infrared spectroscopy. | |
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MedLine Citation:
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PMID: 10685593 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Little is known about the in-flight cerebral oxygen status (COS) of fighter pilots. The purpose of this study was to evaluate the COS of fighter pilots during an F-15DJ flight. METHODS: Three male F-15DJ fighter pilots volunteered to serve as test subjects during aerial gunnery training (AGT) missions. During the flight, the pilots' COS was continuously monitored from the right forehead using a NIRO-300G near-infrared spectrophotometer. This new instrument is capable of measuring the concentration changes in the brain of oxygenated hemoglobin (O2Hb), reduced hemoglobin (HHb), total hemoglobin (cHb, O2Hb + HHb), and the tissue oxygenation index (TOI, O2Hb/cHb). RESULTS: Continuous changes of COS within the brain were clearly demonstrated using NIRO-300G, the changes included reductions in O2Hb, cHb, and TOI with increased +Gz, in a mirror image fashion. The maximum decreased concentration of hemoglobin during flight ranged from 12.8 to 25.6 micromol x L(-1) (of brain tissue). CONCLUSIONS: We believe this study is the first monitoring of COS during F-15 actual flight. The monitoring of COS during F-15 flight showed that the effect of +Gz was to simultaneously lower blood flow in a mirror image fashion. Our results demonstrated that near-infrared spectroscopy (NIRO-300G) provides a reliable and sensitive method for the monitoring of pilots' COS during flight. |
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Authors:
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A Kobayashi; Y Miyamoto |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Aviation, space, and environmental medicine Volume: 71 ISSN: 0095-6562 ISO Abbreviation: Aviat Space Environ Med Publication Date: 2000 Feb |
Date Detail:
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Created Date: 2000-03-02 Completed Date: 2000-03-02 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7501714 Medline TA: Aviat Space Environ Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 177-83 Citation Subset: IM; S |
Affiliation:
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Aeromedical Laboratory, Japan Air Self Defense Force, Tachikawa-shi, Tokyo. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acceleration
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adverse effects Adult Aerospace Medicine / methods* Brain Chemistry* Cerebrovascular Circulation / physiology Humans Hypergravity / adverse effects Hypoxia, Brain / diagnosis*, etiology, metabolism, physiopathology Japan Male Military Personnel* Monitoring, Physiologic / instrumentation, methods* Oxygen Consumption Oxyhemoglobins / analysis* Reproducibility of Results Sensitivity and Specificity Spectroscopy, Near-Infrared / methods* |
| Chemical | |
Reg. No./Substance:
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0/Oxyhemoglobins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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