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A model describing acceleration-induced blackout

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Abstract

A mathematical model is derived that describes oxygen concentration in a retinal capillary in terms of the local rate of oxygen utilization and arterial pressure at eye level. The model is applied to describe the loss of vision that occurs upon exposure to acceleration stress.

As applied to animals, the model provides a qualitative explanation for the appearance of experimentally measured acceleration tolerance curves. As applied to man, it offers an excellent correlation of available data. Furthermore, it provides a mechanism for extrapolating experimental results using idealized exposure patterns to the more complex acceleration patterns encountered by pilots in operational situations.

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References

  • Anderson, B. andSaltzman, H. A. Retinal oxygen utilization measured by hyperbaric blackout.Archives of Opthalmology, 1964,72, 792–795.

    Google Scholar 

  • Andina, F. Über “schwarzsehen” als ausdruck von blutdruckschwankungen beim sturzflügen.Schweizerische Medizinische Wochenschrift 1937,18, 753–756.

    Google Scholar 

  • Bill, A. Ocular circulation. Chap. 6 in Moses, R. A.,Adler's physiology of the eye, 5th ed., St. Louis: C. V. Mosby, 1970.

    Google Scholar 

  • Burns, J. W. An evaluation of a tilt-back seat as a means of increasing acceleration tolerance. In Preprints of 1973 Annual Scientific Meeting. Aerospace Medical Association, Washington, D. C., 1973.

    Google Scholar 

  • Duane, T. D. Observations on the fundus oculi during blackout. A.M.A.Archives of Opthalmology 1954,51, 343–355.

    CAS  Google Scholar 

  • Gauer, O. H., andZuidema, G. D. Gravitational stress in aviation medicine. Boston: Little, Brown & Co., 1961.

    Google Scholar 

  • Green, J. F., andMiller, N. C. A model describing the response of the circulatory system to acceleration stress.Annals of Biomedical Engineering 1973,4, 455–467.

    Google Scholar 

  • Guyton, A. C. Textbook of medical physiology, 3rd ed. Philadelphia: W. B. Saunders Co., 1966.

    Google Scholar 

  • Howard, P. Accelerations. In J. A. Gillies (Ed.),A textbook of aviation physiology. New York: Pergamon Press, 1965.

    Google Scholar 

  • Krogh, A. Number and distribution of capillaries in muscles with calculations of the oxygen pressure head necessary for supplying the tissue.Journal of Physiology (London) 1919,52, 409–415.

    CAS  Google Scholar 

  • Kydd, G. H. Physiologic responses to short durationG z.Aerospace Medicine 1972,43 (9), 1014–1019.

    CAS  PubMed  Google Scholar 

  • Permutt, S., andRiley, R. L. Hemodynamics of collapsible vessels with tone: the vascular waterfall.Journal of Applied Physiology 1963,18 (2), 924–932.

    CAS  PubMed  Google Scholar 

  • Rositano, S. A., Mancini, R. E., Krutz, R. W., Jr., andSandler, H. Noninvasive determination of retrograde eye level blood flow as a+G ztolerance indicator. In Preprints of 1973 Annual Scientific Meeting. Aerospace Medical Association, Washington, D. C., 1973.

    Google Scholar 

  • Stoll, A. M. Human tolerance to positiveG or determined by the physiological end points.Journal of Aviation Medicine 1956,27, 356–367.

    CAS  PubMed  Google Scholar 

  • Wood, E. H., andLambert, E. H. Some factors which influence the protection afforded by pneumatic anti-g suits.Journal of Aviation Medicine 1952,23, 218–228.

    CAS  PubMed  Google Scholar 

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This work was supported by Air Force Contract No. F44620-72-C-0011.

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Miller, N.C., Green, J.F. A model describing acceleration-induced blackout. Ann Biomed Eng 2, 58–68 (1974). https://doi.org/10.1007/BF02368086

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  • DOI: https://doi.org/10.1007/BF02368086

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