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.

    17/30 (page 509)
    Exp. 6. Subject C, 31/12/95. For 40 minutes percentage of CO = '068 °/0. Thereafter = -059 %. After 1 hr. 24 mins, saturation of blood = 27-9 % oxygen tension = — ,, 2hrs. 0 „ 99 ,, — 30'0 ,, 99 „ =25-4% » 2 „ 24 „ 99 = 31-7,, 99 „ = 23'9 „ ,, 2 ,, 38 „ 99 „ = 33T ,, 99 „ — 22'3 „ Average 31 T% 23-9 % Exp. 7. Subject A, 5/1/96. Percentage of CO = ‘078 °/0 for first 2f hours. Thereafter reduced to= '055 °/„. After 1 hr. 20 mins. sat. of blood =23-4% . \ oxygen tension = — 1 „ 40 >• ?> n = 30-5 „ = — 2 hrs. 4 99 99 = 34-9 „ J) n = 30-6% 2 „ 23 99 99 99 = 35-5 „ >> = 29-8 „ 3 „ 12 99 99 99 = 35-5 „ jj = [19-2 to 29-8%] 4 „ 0 n 99 ») = 35-5 ,, n = [19 2 to 29-8 „] Average 35-2% 30-2 % In this experiment we intended to ascertain whether a reduction by 023 °/o of the percentage of CO breathed would be followed by a corresponding reduction in the saturation of the blood. No appreciable reduction was, however, observed within 1| hours (see p. 514). Exp. 8. Subject B, 6/1/96. Percentage of CO = *0476 throughout. After 1 hr. 37 mins, saturation of blood = 28-8% . . oxygen tension = 23-8% „ 2 hrs. 8 n )) = 27-8 „ M 99 = 23-8 „ 2 >> 38 n f) 99 = 27-8 „ n 99 - 23-8 „ n 3 „ 8 f> 99 99 = 27-8 „ >> 99 = 23-8 „ )> 3 ,, 38 99 99 99 = 26-9 „ 99 99 = 24-9 „ » 3 „ 58 9 9 99 99 = 26-4 99 99 = 25-5 „ Average 27-4 % 24-3% To the above we add the results of two experiments (Nos. 9 and 10) given in the former paper1. The stock of gas used for filling the cylinder for these experiments was analysed aud found to contain 93‘3°/o of carbonic oxide. The gas in the cylinder must therefore, judging from the other experiments, have contained about 10% of air, and the percentage of carbonic oxide in the air breathed has been corrected on this basis. We have not added the results of experi-