Management of Hyponatremia in Hemodialysis Patients

Introduction to Hyponatremia Management

• The primary goal is preventing osmotic demyelination syndrome (ODS) by controlling the rate of sodium correction to 4-6 mEq/L per 24 hours, not exceeding 8-10 mEq/L in the first 24 hours, which requires careful manipulation of dialysate sodium concentration and blood flow rates during hemodialysis sessions 1

Dialysate Sodium Concentration Management

• Maintain dialysate sodium at 135-138 mEq/L for ongoing treatments, as this range optimizes volume and blood pressure control without promoting excessive thirst or interdialytic weight gain 1
• Avoid sustained use of dialysate sodium ≥140 mEq/L, which increases thirst, interdialytic weight gain, hypertension, and cardiovascular workload—effects that contribute to morbidity and mortality 1, 2, 3, 4

Dietary Sodium Management

• Implement dietary sodium restriction to 2-3 g/day (85-100 mmol/day) to minimize interdialytic sodium accumulation and facilitate achievement of dry weight 1, 2, 3, 5
• Dietary sodium restriction is essential for volume and blood pressure control, directly impacting cardiovascular morbidity and mortality 2, 3

Monitoring and Adjustment

• Measure serum sodium every 2-4 hours during initial dialysis sessions to ensure correction rates remain within safe limits 1
• Continuously assess neurological status for signs of ODS, including confusion, altered consciousness, or new neurological deficits 1