The oxygen tension of arterial blood / by John Haldane and J. Lorrain Smith.

  • John Scott Haldane
Date:
[1896]
Catalogue details

Licence: Public Domain Mark

Credit: The oxygen tension of arterial blood / by John Haldane and J. Lorrain Smith. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    B. For tint of full saturation. 2-2 c.c. of carmine, not quite enough. 2-4 „ »» right. 2-6 „ right. 2-8 „ >» slightly too much. saturation of sample = x ^ x 100 = 23-5%. 40 4’0 Corrected for dissociation = 23-9 °/0. (2) at 1.3 p.m. A. For tint of sample. •3 c.c. of carmine, not quite enough. •4 „ „ right. •5 „ „ slightly too much. B. For tint of full saturation. 2-6 c.c. of carmine, not quite enough. 2- 8 „ „ right. 3- 0 ,, ,, slightly too much. •4 4-8 .•. saturation of sample = —-r x x 100 = 28-6%. 45*4 45*0 Corrected for dissociation = 29-1 %. (3) at 1.25 p.m., (4) at 1.50p.m., and (5) at 2.16p.m., gave exactly the same results as (2). Calculation of oxygen tension. CO tension in the (dried) air breathed was -061 % of an atmosphere. .-. CO tension in the (moist) air of the pulmonary alveoli was -057 % of an atmo- sphere. Now with the same CO tension in pure air outside the body haemoglobin would become 35% saturated, whereas the arterial blood only became 29-1 % saturated. Hence in the arterial blood the oxygen tension must have been increased above atmospheric oxygen tension (20-9 % of an atmosphere) in the proportion of 29-1 35 100-29-1 t0 100-35 , or from 20-9 to 27-5.