caa a22 4500 465825664 CHVBK 20180323112148.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF02832177 doi (NATIONALLICENCE)springer-10.1007/BF02832177 Electroencephalographic and evoked potential monitoring in the hyperbaric environment [Elektronische Daten] [Gerhard Litscher, Gerhard Friehs, Helfrid Maresch, Gert Pfurtscheller] The purpose of this study was to investigate brain bioelectrical activity during hyperbaric oxygenation by continuous and simultaneous monitoring of electroenccphalographic 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 oxygénation, whereas the heart rate showed a significant decrease (pairedt test,P < 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 pairedt test;P < 0.2). All subjects showed insignificant increases in dominant alpha frequency and decreases in delta frequency under hyperbaric situations. Little, Brown and Company, 1990 Brain: electroencephalogram nationallicence evoked potentials nationallicence Monitoring: electroencephalography nationallicence evoked potentials nationallicence Oxygen: hypcrbaric nationallicence Heart: rate nationallicence rate variability nationallicence Litscher Gerhard Department of Medical Informatics, Institute of Biomedical Engineering, Technical University of Graz, Ludwig Boltzmann-Institute of Medical Informatics, Brockmanngasse 41, A-8010, Graz, Austria aut Friehs Gerhard Department of Thoracic and Hyperbaric Surgery, University of Graz, Graz, Austria aut Maresch Helfrid Department of Medical Informatics, Institute of Biomedical Engineering, Technical University of Graz, Ludwig Boltzmann-Institute of Medical Informatics, Brockmanngasse 41, A-8010, Graz, Austria aut Pfurtscheller Gert Department of Medical Informatics, Institute of Biomedical Engineering, Technical University of Graz, Ludwig Boltzmann-Institute of Medical Informatics, Brockmanngasse 41, A-8010, Graz, Austria aut Journal of Clinical Monitoring Springer Netherlands 6/1(1990-01-01), 10-17 0748-1977 6:1<10 1990 6 10877 https://doi.org/10.1007/BF02832177 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02832177 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Litscher Gerhard Department of Medical Informatics, Institute of Biomedical Engineering, Technical University of Graz, Ludwig Boltzmann-Institute of Medical Informatics, Brockmanngasse 41, A-8010, Graz, Austria aut NATIONALLICENCE 700 1- Friehs Gerhard Department of Thoracic and Hyperbaric Surgery, University of Graz, Graz, Austria aut NATIONALLICENCE 700 1- Maresch Helfrid Department of Medical Informatics, Institute of Biomedical Engineering, Technical University of Graz, Ludwig Boltzmann-Institute of Medical Informatics, Brockmanngasse 41, A-8010, Graz, Austria aut NATIONALLICENCE 700 1- Pfurtscheller Gert Department of Medical Informatics, Institute of Biomedical Engineering, Technical University of Graz, Ludwig Boltzmann-Institute of Medical Informatics, Brockmanngasse 41, A-8010, Graz, Austria aut NATIONALLICENCE 773 0- Journal of Clinical Monitoring Springer Netherlands 6/1(1990-01-01), 10-17 0748-1977 6:1<10 1990 6 10877 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer