Correction of hyper- and hyponatraemia during continuous renal replacement therapy

Area of Science:

• Nephrology
• Critical Care Medicine
• Internal Medicine

Background:

• Severe sodium imbalances (hypernatraemia and hyponatraemia) pose significant health risks.
• Rapid or inadequate correction of these imbalances can lead to serious complications.
• Managing sodium levels during renal replacement therapy (RRT) presents unique challenges.

Observation:

• This study utilizes two case scenarios to demonstrate a novel method for safe sodium correction.
• The proposed method involves step-wise manipulation of dialysate or replacement fluid composition.
• Focus is on managing sodium levels in patients undergoing continuous RRT.

Findings:

• Hypernatraemia during continuous RRT can be safely corrected by adding calculated amounts of 30% NaCl to fluids.
• This addition aims to achieve a specific sodium concentration in the fluid for safe serum sodium equilibration.
• Hyponatraemia is managed by stepwise addition of sterile water to fluids, targeting the desired serum sodium level.

Implications:

• Step-wise adjustment of dialysate/replacement fluid sodium concentration offers a safe and effective approach.
• This method provides a reliable strategy for correcting sodium disorders in patients on RRT.
• The findings can guide clinical practice for managing complex electrolyte disturbances in critically ill patients.