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.

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    breathing, is the taking up of oxygen by the blood from the air in the lungs, and giving up of carbonic acid to the latter. These processes of the double gas exchange are not yet sufficiently explained. The ques- tion which is yet to be solved is: Does the ex- change of these gases take place in consequence of the difference between their tensions in the blood and in the air in the lungs and the tis- sues respectively, or through the laws of diffu- sion, or are there other factors in operation ? Oxygen in the blood exists for the most part as oxyhemoglobin. To find the tension of oxy- gen in the blood it is necessary, first, to consider the laws of dissociation of oxyhemoglobin. G. Huefner and others have examined this dissocia- tion under temperature of 35° and 39^ C. (95^ and 102° F.), and their experiments have shown that when the partial pressure of oxygen is re- duced to the level of the pressure existing in at- mospheric air, there is no marked influence no- ticed in regard to the quantity of oxygen, either in the blood or in a correspondingly concentrated oxyhemoglobin solution. The investigators— [10]