J. Anim Sci.
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J. Anim Sci. 1973. 36:531-534.
© 1973 American Society of Animal Science
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Comparison of Blood Source and Diurnal Variation on Blood Hydrocortisone, Growth Hormone, Lactate, Glucose and Electrolytes in Swine1

D. G. Topel, G. M. Weiss, D. G. Siers and J. H. Magilton2

Iowa State University, Ames 50010

Abstract

THIS study was conducted in two phases. Phase one involved eight swine that were catheterized to facilitate blood collections at 8 am, 4 pm and midnight to determine circulating levels of plasma hydrocortisone, growth hormone, glucose, lactate, sodium, potassium, chloride and blood pH. Growth hormone levels decreased significantly from the 8 am to the 4 pm collection. Hydrocortisone levels were highest in the morning, lowest in the afternoon and increased slightly at the midnight collection. Plasma lactate, sodium and potassium values were highest at the 8 am collection, but the differences were not significant when compared with the 4 pm and midnight values. Phase two compared arterial and venous blood from 10 pigs for the same parameters studied in phase one. No significant differences in mean values were obtained when the two blood sources were compared, except for blood pH. The venous blood had significantly lower values than did arterial blood. Postmortem longissimus muscle color and lactate values were in normal ranges for the pigs used in both studies.

Footnotes

1 Journal Paper No. J-7079 of the Iowa Agriculture and Home Economics Experiment Station, Ames. Project No. 1697.

2 The authors wish to express their appreciation to Dr. G. M. Thomson for his assistance on the statistical analysis.






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Copyright © 1973 by the American Society of Animal Science.