By Topic

IEEE Engineering in Medicine and Biology Magazine

Issue 1 • Date March 1991

Filter Results

Displaying Results 1 - 9 of 9
  • Prevention of the pathophysiologic effects of acceleration in humans: fundamentals and historic perspectives

    Publication Year: 1991, Page(s):26 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1982 KB)

    The deleterious effects of high-G environments and their relevance to the development of anti-G suits are examined. The history of efforts to protect fighter pilots against these effects is recounted. The discussion covers the discovery of cerebral anoxic reserve time, the limited power and consequent restricted sustained G capabilities of propeller-driven fighter planes, the use of M-1-type posit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cardiovascular model for studying circulatory impairment under acceleration

    Publication Year: 1991, Page(s):37 - 40
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    A model of the cardiovascular system developed for use in the study of cardiovascular responses to acceleration of the type encountered by pilots of high-performance aircraft is described. The model includes simulations of the heart; arterial, venous, and peripheral circulations; and physiological compensatory mechanisms important to acceleration studies. It can predict blood pressure and flow in ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theoretical analysis of acceleration-induced central nervous system ischemia

    Publication Year: 1991, Page(s):41 - 45
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (755 KB)

    The mechanism responsible for the +G/sub z/-induced loss of consciousness (G-LOC) experienced by fighter pilots is investigated. The nature of a G-LOC episode is described for cases of rapid onset. Evidence suggests that the G-LOC mechanism might be closely related to the mechanism for sleep. A theory of G-LOC that treats it as a protective physiological mechanism is proposed.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Non-invasive sensing systems for acceleration-induced physiologic changes

    Publication Year: 1991, Page(s):46 - 51
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (730 KB)

    The status of a system under development for detection of gravity-induced loss of consciousness (G-LOC) and subsequent recovery is presented. The physiological factors under investigation for use in the loss-of-consciousness monitoring system (LOCOMS) effort are eye blink rate, head slumping, head-level arterial pulsations, and spectral shift in EEG frequency. Also being studied for inclusion in t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Integrated systems for detecting and managing acceleration-induced loss of consciousness

    Publication Year: 1991, Page(s):52 - 55
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (543 KB)

    The requirements for an acceleration-induced loss of consciousness (G-LOC) warning and recovery system (G-WARS) are discussed, and the approach being pursued is described. A combination of sensors will work together with an acceleration monitor to formulate an accurate assessment of pilot consciousness. Warnings will be issued to prevent G-LOC from occurring, possibly in the form of a slight pulsi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Centrifuges for studying the effects of sustained acceleration on human physiology

    Publication Year: 1991, Page(s):56 - 65
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1431 KB)

    The operation, development, and use of high-performance centrifuges with high G-onset rates, similar to those found in modern fighter aircraft, are discussed. Their performance characteristics are examined, and the USAFSAM centrifuge at Brooks AFB in Texas is then described. Centrifuges for space research and large-radius track centrifuges are considered. The benefits of the latter are discussed.<... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Integrated protective systems for operational acceleration-induced loss of consciousness

    Publication Year: 1991, Page(s):66 - 75
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (941 KB)

    Systems that can protect pilots from not only acceleration-induced loss of consciousness (G-LOC) but also from exposure to chemical, biological, and nuclear weapons are discussed. Hazards such as fire, drowning, and ballistic injury are not considered. Physiological stresses, protection methods, and their impact on G capability at increased altitudes are examined, as are stresses induced by the en... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ethical issues in biomedical engineering: the Bjork-Shiley heart valve

    Publication Year: 1991, Page(s):76 - 78
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB)

    The ethical issues surrounding the failure of one type of Bjork-Shiley heart valve (due to fracture of the outflow strut), and Shiley Inc.'s handling of the problem are examined. withholding of information on the part of Shiley is discussed. The consequences of this behavior (as many as 765 fractures and 480 deaths have been estimated) are described. Regulatory changes that could prevent future pr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • For whom bell toils: medical imaging by telephone

    Publication Year: 1991, Page(s):88 - 89
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The use of the induction balance, which was invented by Alexander Graham Bell to cancel out line interference on his telephone, to determine the location of bullets inside the human body is discussed. Experiments conducted to locate a bullet in the body of US President Garfield, who had been shot by an assassin in 1881, are described. The trials on Garfield were unsuccessful, but the approach was ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Engineering in Medicine and Biology Magazine contains articles on current technologies and methods used in biomedical and clinical engineering.

 

This Magazine ceased publication in 2010. The current retitled publication is IEEE Pulse.

Full Aims & Scope