Correction Rates and Clinical Outcomes in Hospitalized Adults With Severe Hyponatremia: A Systematic Review and Meta-Analysis.
A systematic review and meta-analysis found that, contrary to long-standing guidance favoring slow correction, more rapid correction of severe hyponatremia was associated with lower mortality and shorter hospital stays — without a statistically significant increase in osmotic demyelination syndrome.
Background
Guidelines limit hyponatremia correction in the first 24 hours to prevent osmotic demyelination syndrome (ODS), but emerging evidence has suggested slower correction may be associated with higher mortality. This review evaluated the association between sodium correction rate and death.
Study design
Systematic review and meta-analysis of 16 cohort studies (11,811 hospitalized adults with severe hyponatremia, mean age ~68), comparing rapid (≥8–10 mEq/L/24 h) versus slow (<8 mEq/L) and very slow (<4–6 mEq/L) correction. Primary outcomes were in-hospital and 30-day mortality; secondary outcomes were length of stay and ODS, with GRADE certainty assessment.
Key findings
Moderate-certainty evidence showed rapid correction was associated with fewer in-hospital deaths than slow (OR 0.67, 95% CI 0.55–0.82) and very slow correction (OR 0.29, 95% CI 0.11–0.79). Lower-certainty evidence linked rapid correction to fewer 30-day deaths (RR 0.55 vs slow; 0.35 vs very slow) and shorter length of stay (by 1.2–3.1 days). Rapid correction was not associated with a statistically significant increase in ODS.
Clinical implications
These findings challenge the reflexive prioritization of very slow correction and suggest overly cautious correction may carry its own harms. However, because the data are observational and confounded by comorbidity (sicker patients are corrected more slowly and die more often), guideline change is not yet warranted — most experts continue to recommend controlled correction with vigilance in high-risk patients (low sodium, alcohol use, hypokalemia, malnutrition).
Category
Research
Source
JAMA Internal Medicine
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