Carbonic acid in medicine / by Achilles Rose, M.D. ; with the portraits of van Helmont, Priestley and Lavoisier.

  • Achilles Rose
Date:
1905
Catalogue details

Licence: Public Domain Mark

Credit: Carbonic acid in medicine / by Achilles Rose, M.D. ; with the portraits of van Helmont, Priestley and Lavoisier. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    21/288 (page 3)
    oxygen by volume in the venous blood of non- active muscles, and still smaller quantities in that of those in action. Oxygen is entirely absent, or present only in traces, in the blood of the asphyxiated. Zuntz states that the ve- nous blood of the right heart contains on an aver- ^g^ 7-15 P^r cent, less of oxygen than the arte- rial blood. The proportion of carbonic acid contained in the arterial blood is usually forty per cent, by volume, but varies between thirty and forty per cent. It always corresponds exactly, or very nearly, to the amount contained in the air of the alveoli. Every change in the composi- tion of the alveolar air must be followed by a corresponding change in the tension and the absolute quantity of the carbonic acid in the arterial blood. Again, the carbonic-acid ten- sion of the arterial blood affects primarily the diffusion between the blood and the tissues; hence any variation in the proportion of car- bonic acid in the alveolar air, when continuing for some time, will cause a corresponding change in the proportion of the carbonic acid [3]