Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Litscher, G; Friehs, G; Maresch, H; Pfurtscheller, G.
Electroencephalographic and evoked potential monitoring in the hyperbaric environment.
J Clin Monit. 1990; 6(1):10-17
Doi: 10.1007/BF02832177
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- Führende Autor*innen der Med Uni Graz
- Litscher Gerhard
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- Abstract:
- The purpose of this study was to investigate brain bioelectrical activity during hyperbaric oxygenation by continuous and simultaneous monitoring of electroencephalographic and bimodal (auditory, somatosensory) evoked potentials. Multivariable recordings (electroencephalogram, brainstem auditory evoked potentials, early somatosensory evoked potentials, heart rate, heart rate variability, and transcutaneous partial pressure of oxygen) were measured with a new technique in 12 healthy male volunteers 26 to 52 years old (mean +/- SD, 35.9 +/- 9.5 years). Recordings were obtained while the subjects breathed (1) air at normal atmospheric pressure, (2) 100% oxygen at normal atmospheric pressure, (3) air at 2 atm (10 meters sea water [msw]), and (4) 100% oxygen at 2 atm (10 msw). Spontaneous brain electrical activity, somatosensory evoked potentials, and heart rate variability were not significantly affected during hyperbaric oxygenation, whereas the heart rate showed a significant decrease (paired t test, P less than 0.05). Alterations in brainstem auditory evoked potentials were seen under hyperbaric conditions and did not reach statistical significance (increase of the I-V interpeak latency by paired t test; P less than 0.2). All subjects showed insignificant increases in dominant alpha frequency and decreases in delta frequency under hyperbaric situations.
- Find related publications in this database (using NLM MeSH Indexing)
- Adult -
- Alpha Rhythm - standards
- Delta Rhythm - standards
- Electrocardiography - standards
- Electroencephalography - standards
- Evoked Potentials, Auditory - physiology
- Evoked Potentials, Somatosensory - physiology
- Heart Rate - physiology
- Humans - physiology
- Hyperbaric Oxygenation - adverse effects
- Male - adverse effects
- Middle Aged - adverse effects
- Monitoring, Physiologic - instrumentation
- Reference Values - instrumentation
- Research Support, Non-U.S. Gov't - instrumentation