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III. INFLUENCE ON THE EXPIRATORY POSITION OF THE CHEST IN MAN OF AN INSPIRED AIR WHICH IS LOW IN OXYGEN AND HIGH IN CARBON DIOXIDE, AND OF RESISTANCE TO INSPIRATION AND TO EXPIRATION

J. A. GREENE, M.D.

Arch Intern Med. 1933;52(3):447-453.

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In one previous study,¹ it was found that the expiratory position of the chest may be increased by slight muscular work, and in another,² evidence was presented which indicated that this alteration may be produced by a psychic or reflex mechanism. One purpose of this study was to determine whether or not anoxemia or the accumulation of carbon dioxide would alter the expiratory position of the chest.

In a previous study,² the carbon dioxide excreted was determined by the passage of dry expired air through weighed containers of soda lime and calcium chloride. This offered a slight resistance to expiration. Since Bittorf and Forschbach³ and Siebeck⁴ showed that stenosis of extrinsic air passages increased the middle position of the chest, it was decided to determine the influence of a constant resistance to expiration and to inspiration of the expiratory position of the chest.

METHOD

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Author Affiliations
IOWA CITY

From the Lily Laboratory for Clinical Research, Indianapolis City Hospital, and Indiana University School of Medicine.

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