AJCN North Carolina Research Campus
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Purchase Article
Right arrow View Shopping Cart
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Stegink, L. D.
Right arrow Articles by Baker, G. L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Stegink, L. D.
Right arrow Articles by Baker, G. L.
Agricola
Right arrow Articles by Stegink, L. D.
Right arrow Articles by Baker, G. L.

American Journal of Clinical Nutrition, Vol 36, 917-925, Copyright © 1982 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Effect of sampling site on plasma amino acid concentrations of infants: effect of skin amino acids

LD Stegink, LJ Filer and GL Baker

Plasma taurine, aspartate, threonine, serine, glycine, alanine, valine, leucine, tyrosine, phenylalanine, tryptophan, lysine, histidine, and ornithine concentrations are significantly greater (p less than 0.05, "Student's" t test) in blood samples obtained by conventional heel skin puncture techniques from 1-yr-old infants than values in venous plasma. Differences in plasma concentrations of taurine, aspartate, serine, glycine, and ornithine were particularly striking, with levels in plasma collected from the heel being 1.6 to 6.7 times higher than levels in venous plasma. These increased plasma amino acid concentrations were shown to result primarily from contamination of the plasma with amino acids present on the skin surface. Thorough washing and stimulation of blood flow to the heel by warming prior to skin puncture reduced observed differences. Plasma amino acid concentrations of blood samples obtained by conventional heel skin puncture procedures can be "normalized" to venous values through the use of data on the amino acid composition of heel skin washings.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1982 by The American Society for Nutrition