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Published on: October 2, 2020
Sodium balance in maintenance hemodialysis.
1Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea.
Electrolyte & Blood Pressure : E & BP
|March 20, 2013
Summary
Maintaining sodium balance is crucial for hemodialysis patients. Fixed dialysate sodium can lead to positive sodium balance, potentially increasing thirst, weight gain, and mortality. Sodium alignment is a method to improve this balance.
Area of Science:
- Nephrology
- Physiology
- Biochemistry
Background:
- Sodium is the primary determinant of extracellular fluid volume and serum osmolality.
- Sodium homeostasis relies on dietary intake versus urinary output in healthy individuals.
- In hemodialysis patients, sodium balance depends on dietary intake and removal during dialysis sessions.
Purpose of the Study:
- To explain the mechanisms of sodium removal during hemodialysis.
- To highlight the importance of the sodium gradient in achieving sodium balance.
- To discuss methods for reducing positive sodium balance in hemodialysis patients, such as sodium alignment.
Main Methods:
- Analysis of sodium removal via convective and diffusive processes during hemodialysis.
- Examination of the role of the sodium gradient between dialysate and plasma.
- Discussion of fixed versus individualized dialysate sodium concentrations.
Main Results:
- Sodium removal during hemodialysis occurs through convection (approximately 78%) and diffusion (approximately 22%).
- A fixed dialysate sodium concentration can result in a persistent positive sodium balance for many patients.
- Positive sodium balance may contribute to increased thirst, interdialytic weight gain, and mortality.
Conclusions:
- Optimizing sodium removal during hemodialysis is essential for patient well-being.
- Individualized approaches, like sodium alignment, may be necessary to prevent positive sodium balance.
- Careful management of sodium balance can mitigate adverse outcomes in hemodialysis patients.
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