Sodium Correction Practice and Clinical Outcomes in Profound Hyponatremia

Area of Science:

• Internal Medicine
• Nephrology
• Critical Care Medicine

Background:

• Hyponatremia, a condition of low serum sodium, requires careful management to avoid complications.
• Profound hyponatremia (sodium <120 mmol/L) presents significant clinical challenges.
• Nonoptimal correction of hyponatremia can lead to adverse outcomes.

Purpose of the Study:

• To determine the frequency of nonoptimal hyponatremia correction.
• To identify factors associated with nonoptimal correction.
• To assess the impact of hyponatremia correction on morbidity and mortality.

Main Methods:

• Retrospective analysis of electronic medical records for patients with profound hyponatremia (2008-2012).
• Classification of patients based on sodium correction at 24 hours: optimal (6-10 mmol/L), undercorrected, or overcorrected.
• Statistical analysis using Kruskal-Wallis, chi-squared, logistic regression, and t-tests to compare groups and assess outcomes, including osmotic demyelination syndrome (ODS) and length of stay (LOS).

Main Results:

• Of 412 patients, 51.2% had optimal correction, 21.1% were undercorrected, and 27.9% were overcorrected.
• Both patient and treatment factors contributed to nonoptimal correction.
• Undercorrection was associated with a significantly increased hospital LOS (9.3 days).
• Osmotic demyelination syndrome occurred in only one patient; overcorrection was not linked to mortality or ICU LOS.

Conclusions:

• Nonoptimal correction of profound hyponatremia is frequent.
• Serious morbidity, such as ODS, is infrequent despite nonoptimal correction.
• Undercorrection poses a risk for prolonged hospitalization.