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The hyponatramia of multiple myeloma is true and not pseudohyponatramia

, : The hyponatramia of multiple myeloma is true and not pseudohyponatramia. Medical Hypotheses 67(4): 839-840

The hyponatremia found in multiple myeloma and which is associated with a reduced anion gap (ag) is considered to be pseudohyponatremia due to the displacement of water by the high globulin content in the blood. Serum proteins participate in acid-base balance. Stewart and other authors in their approach to acid-base interpretation acknowledge electrical neutrality as a fundamental characteristic of body fluids. Furthermore, they have shown that both the strong ion difference (SID) and protein, specifically, negatively-charged albumin affect hydrogen ion concentration (H+) in the body - i.e., for example an increase in SID leads to a decrease in H+ and a decrease in albumin leads to a similar effect. The M proteins of multiple myeloma are positively charged. As a result they cause a decrease in sodium levels and the anion gap and thus a true hyponatremia. (c) 2006 Elsevier Ltd. All rights reserved.


PMID: 16707230

DOI: 10.1016/j.mehy.2006.02.051

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