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Red blood cell intracellular electrolyte concentration in children with acute hyponatremia
Ron Ben-Abraham1, Oded Szold, Shefi Menachem
1The Department of Anesthesiology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel.
Insights
In children with acute hyponatremia, red blood cell (RBC) sodium levels inversely correlate with plasma sodium. Plasma sodium may not accurately reflect intracellular sodium in these cases.
Area of Science:
- Pediatric Nephrology
- Clinical Chemistry
- Hematology
Background:
- Acute hyponatremia in children presents diagnostic challenges.
- Accurate assessment of sodium levels is crucial for effective treatment.
Purpose of the Study:
- To investigate the relationship between intracellular and extracellular red blood cell (RBC) sodium and potassium concentrations in pediatric patients with acute hyponatremia.
Main Methods:
- A prospective case-control study was conducted in a pediatric intensive care unit.
- Plasma and RBC sodium and potassium levels were measured in 9 children with acute hyponatremia and 9 healthy controls using atomic absorption spectrophotometry over 48 hours.
Main Results:
- A significant inverse correlation (p < 0.016, r = -0.76) was observed between RBC intracellular sodium concentration and plasma sodium levels in the acute hyponatremic group.
Conclusions:
- Plasma sodium levels may not reliably indicate intracellular sodium concentrations in children experiencing acute hyponatremia.
- Further research is needed to elucidate the complex relationship between acute hyponatremia and RBC sodium levels.
Objective:
To determine the relationship between intra- and extracellular red blood cell (RBC) sodium and potassium concentration in children with acute hyponatremia.
Design:
Prospective case control study.
Setting:
Pediatric intensive care unit of a tertiary care university-affiliated community hospital.
Patients And Methods:
Plasma and RBC sodium and potassium concentrations were measured in nine consecutive children with acute hyponatremia (sodium <136) (hyponatremic group) and compared to those in nine healthy children with normal plasma sodium levels (control group). Measurements were taken on admission and after 12, 24, 36 and 48 hours by means of an atomic absorption spectrophotometric method.
Results:
An inverse correlation was found between RBC intracellular sodium concentration and plasma levels in the acute hyponatremic group (p < 0.016, r = -0.76).
Conclusions:
Plasma levels of sodium may not accurately reflect intracellular concentration in the assessment of acute hyponatremia in children. Further studies on the relationship between acute hyponatremia and red blood cell sodium concentration are warranted.