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Total Body Potassium in InfantsDetermination by Whole-Body Counting of Radioactive Potassium (40K)
Ladislav P. Novak, PhD;
Ken Hamamoto, MD;
Alan L. Orvis, PhD;
Edmund C. Burke, MD
Am J Dis Child. 1970;119(5):419-423.
Abstract
Total body potassium was determined by whole-body counting of radioactive potassium (40 K) in 31 white healthy male and 33 female infants 1 month old. The absolute amount of total body potassium of the male infants was 194.2 mEq or 7.6 gm; that of the female infants, 183.9 mEq or 7.2 gm. The relative amount of total body potassium of the male infants was 46.0 mEq/kg or 1.80 gm/kg of body weight; that of the female infants, 47.1 mEq/kg or 1.84 gm/kg of body weight. These differences were not statistically significant. In the male infants, total body potassium content correlated better with body weight (r = 0.67) than with height, whereas in the female infants, a slightly higher correlation of total body potassium content to body height (r = 0.74) than to weight was found.
Author Affiliations
Rochester, Minn
From the sections of clinical pathology (Dr. Novak), therapeutic radiology (Dr. Orvis), and pediatrics (Dr. Burke), Mayo Clinic and Mayo Foundation, and the Mayo Graduate School of Medicine (University of Minnesota, Rochester (Dr. Hamamoto).
Footnotes
Received for publication Aug 25, 1969.
Reprint requests to Mayo Clinic, 200 First St SW, Rochester, Minn 55901.
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