Positive-pressure breathing (PPB), a technique in which air is forced into a pilot by means of a face mask to raise intrathoracic pressure, is examined. It has been shown to lengthen subjects' ability to endure +Gz acceleration epochs and has been proposed for operational use to increase G-tolerance. However, PPB can cause ear pain, ear and sinus blocks, pneumothorax, and air embolism. All these side-effects are potentially fatal to the pilot. The pressure proposed for operational use, at altitudes that occur in partially pressurized cockpits of operational aircraft, causes greater lung distension than pressure gradients known to cause pulmonary overpressurization in animals and man. Other means of increasing G-tolerance safely are also examined.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Positive-pressure breathing as a G-protection device: safety concerns


    Additional title:

    Positivdruck-Atmung als Beschleunigungsschutzmassnahme: Sicherheitsaspekte


    Contributors:
    Jennings, T. (author) / Zenetti, C. (author)


    Publication date :

    1988


    Size :

    4 Seiten, 21 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Positive pressure protection device, ship and positive pressure protection method

    REN HANG / HUANG XINNAN / ZHENG KAI | European Patent Office | 2024

    Free access

    Positive pressure protection method and positive pressure protection system

    YANG GUANGJUN | European Patent Office | 2021

    Free access

    Effects of Positive Pressure Breathing on Performance during Acceleration

    R. M. Chambers / R. Kerr / W. S. Augerson et al. | NTIS | 1962


    Medical Screening of Subjects for Acceleration and Positive Pressure Breathing

    Gray, G. / Bateman, W. / Clere, J. M. et al. | British Library Online Contents | 1997


    Van Leer's safety concerns

    British Library Online Contents | 1999