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. 2015 Mar 12;19(1):106. doi: 10.1186/s13054-015-0844-6

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© Liebau et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Statistical correlations between total amino acid and/or protein feeding and whole protein balance (A) and protein oxidation rate (B) in 13 critically ill patients during baseline and parenteral amino acid supplementation (AA) on 2 study days. On the first study day, 13 patients were studied, and on the second study day, 7 of these patients were still being treated in the intensive care unit and were studied again. All measurements performed for all patients are included. The protein balance is presented in grams of protein per kilogram of body weight per day. This was calculated assuming that the phenylalanine content of the human whole-body protein pool is 4% [12]. A positive correlation with r =0.80 (P <0.0001) was observed between the amino acid and/or protein feeding and whole-body protein balance. No correlation with phenylalanine oxidation was observed (r =0.02; P =0.88).