Abstract
Background/objectives
Hyponatremia is the most common electrolyte disorder, and is associated with high-morbimortality rates. The true prevalence of hyponatremia in patients on parenteral nutrition (PN) is unknown, and the relationship between PN composition and development of hyponatremia has yet to be studied. Hypoproteinemia, a common finding in patients receiving PN, induces an overestimation of serum sodium (SNa) levels, when using indirect electrolyte methodology. Thus, SNa should be corrected for serum total protein levels (TP).
The objective was to accurately determine the prevalence of hyponatremia (indirect SNa corrected for PT) and evaluate the relationship between the composition of PN and the development of hyponatremia.
Subjects/methods
Medical records of 222 hospitalized patients receiving total PN during a 7-month period were reviewed. Composition of PN, indirect SNa-mmol/l-, and SNa corrected for TP (SNa-TP)-mmol/l-, both upon initiation and during PN administration, were analyzed.
Results
Hyponatremia (SNa < 135 mmol/l) was present in 81% of subjects when SNa was corrected for TP, vs. 43% without correction (p = 0.001). In total 64% of patients that were eunatremic upon initiation of PN developed hyponatremia during PN administration, as detected by SNa-TP, vs. 28% as detected by uncorrected SNa (p < 0.001). There were no significant differences in volume, osmolarity, sodium or total osmols administered in PN between patients who developed hyponatremia and those who remained eunatremic.
Conclusions
A majority of patients receiving PN present hyponatremia, when indirect SNa levels are corrected for TP. The development of hyponatremia during PN is not related to the composition of the PN.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 12 print issues and online access
$259.00 per year
only $21.58 per issue
Rent or buy this article
Get just this article for as long as you need it
$39.95
Prices may be subject to local taxes which are calculated during checkout


References
Hoorn EJ, Lindemans J, Zietse R. Development of severe hyponatremia in hospitalized patients: treatment-related risk factors and inadecuate management. Nephrol Dial Transplant. 2006;21:70–6.
Hawkins RC. Age and gender as risk factors for hyponatremia and hypernatremia. Clin Chim Acta. 2003;337:169–72.
Waikar SS, Mount DB, Curhan GC. Mortality after hospitalization with mild, moderate, and severe hyponatremia. Am J Med. 2009;122:857–65.
Wald R, Jaber BL, Price LL. Impact of hospital-associated hyponatremia on selected outcomes. Arch Intern Med. 2010;170:294–302.
Corona G, et al. Moderate hyponatremia is associated with increased risk of mortality: evidence from a meta-analysis. PLoS ONE. 2013;8:e80451
Verbalis J, et al. Diagnosis, evaluation, and treatment of hyponatremia: expert panel recommendations. Am J Med. 2013;126:S1–S42
Verbalis JG. Disorders of body water homeostasis. Best Pract Res Clin Endocrinol Metab. 2003;17:471–503.
Hoorn EJ, Zietse R. Hyponatremia revisited: translating physiology to practice. Nephron Physiol. 2008;108:46–59.
Anderson RJ, Chung HM, kluge R, Schrier RW. Hyponatremia: a prospective analysis of its epidemiology and the pathogenetic role of vasopressin. Ann Intern Med. 1985;102:164–8.
American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.) Board of Directors. Clinical guidelines for the use of parenteral and enteral nutrition in adult and pediatric patients. J Parenter Enteral Nutr. 2009;33:255–9.
Singer P, et al. ESPEN guidelines on parenteral nutrition: intensive care. Clin Nutr.2009;28:387–400
Hillier A, Abbot R, Barrett B. Hyponatremia: evaluating the correction factor for hyperglycemia. Am J Med. 1999;106:399–403.
Dimeski G, Morgan TJ, Presneill JJ, Venkatesh B. Disagreement between ion selective electrode direct and indirect sodium measurements: estimation of the problem in a tertiary referral hospital. J Crit Care. 2012;27:326.e9–e16.
Dimeski G, Barnett RJ. Effects of total plasma protein concentration on plasma sodium, potassium and chloride measurements by an indirect ion selective electrode measuring system. Crit Care Ressusc. 2005;7:12–5.
Chow E, Fox N, Gama R. The effect of low serum total protein on sodium and potassium measurement by ion-selective electrodes in critically ill patients. Br J Biomed Sci. 2008;65:128–31.
Liamis G, Liberopoulos E, Barkas F, Elisaf M. Spurious electrolyte disorders: a diagnostic challenge for clinicians. Am J Nephrol. 2013;38:50–7.
Berl T. Impact of solute intake on urine flow and water excretion. J Am Soc Nephrol. 2008;19:1076–8.
Crook MA. Hypoalbuminemia: the importance of correct interpretation. Nutrition. 2009;25:1004–5.
Crook MA. Clinical Chemistry and Metabolic Medicine. 7th ed. London: Hodder Arnold; 2006. p. 280–300.
Smith G, Weidel SE, Fleck A. Albumin catabolic rate and protein–energy depletion. Nutrition. 1994;10:335–41.
Cuesta M, et al. The contribution of undiagnosed adrenal insufficiency to euvolaemic hyponatraemia: results of a large prospective single-centre study. Clin Endocrinol.2016;0:1–9
Sorensen JB, Andersen MK, Hansen HH. Syndrome of inappropiate secretion of antidiuretic hormone (SIADH) in malignant disease. J Intern Med. 1995;238:97–110.
Berghmans T, Paesmans M, Body JJ. A prospective study on hyponatraemia in medical cancer patients: epidemiology, aetiology and differential diagnosis. Support Care Cancer. 1999;8:192–7.
Yoon J, Hee Ahn S, Yoo Lee Y, Min Kim C. Hyponatremia as on indepent prognostic factor in patients with terminal cancer. Support Care Cancer. 2015;23:1733–40.
Choi JS, et al. Prognostic impact of hyponatremia inpatients with colorrectal cancer. Colerectal Dis.2015;15:409–16
Raftopoulos H. Diagnosis and management of hyponatremia in cancer patients. Support Care Cancer. 2007;15:1341–7.
Gómez Hoyos E., et al. Diagnosis and management of patients presenting hyponatremia while receiving parenteral nutrition. Endocrine Abstract 15th European Congress Endocrinology 2013;32:Abstract no. 457.
Cuesta M, Thompson CJ. The syndorme of inappropiate antidiuresis (SIAD). Best Pract Res Clin Endocrinol Metab. 2016;30:175–87.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no competing interest.
Additional information
Funding sources
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Dr. Isabelle Runkle has worked in an advisory capacity for Otuska, and given talks sponsored by Otsuka. Dr. Martin Cuesta has given talks sponsored by Otsuka
Rights and permissions
About this article
Cite this article
Gómez-Hoyos, E., Fernández-Peña, S., Cuesta, M. et al. Hyponatremia in patients receiving parenteral nutrition: the importance of correcting serum sodium for total proteins. The role of the composition of parenteral nutrition in the development of hyponatremia. Eur J Clin Nutr 72, 446–451 (2018). https://doi.org/10.1038/s41430-017-0026-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1038/s41430-017-0026-5