Sensible Medicine This Fortnight in Medicine XXI
Mar 11, 2026
They discuss controversies around how fast to correct severe hyponatremia and limitations of observational data versus randomized trials. They debate designing pragmatic trials to compare correction strategies. They explore a cluster trial of neuromuscular warm-ups in urban high school girls and whether prevention programs can reduce ACL injuries.
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Faster Sodium Correction Linked To Lower 90-Day Mortality
- Faster sodium correction was associated with lower 90-day death or neurologic events in a 1,400-patient retrospective cohort with Na<120.
- Fast correction (>12 mEq/L/24h) showed ~9% absolute reduction versus slow (<8 mEq/L/24h), but groups differed in baseline sickness and admission Na.
Patient Physiology May Drive Correction Speed Effects
- Observational confounding likely explains outcome differences because patients whose sodium corrects faster are physiologically different.
- Slower-correcting patients were older, sicker, and less likely admitted principally for hyponatremia, biasing results toward higher mortality.
Mortality Difference Suggests Residual Confounding
- The large difference in 90-day death (21.3% slow vs 13.2% fast) seems unlikely to be caused solely by correction rate and suggests residual confounding.
- Neurologic events were rare, so mortality—not ODS—largely drove the association.