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Sodium and fluid management in the conservative management of chronic kidney disease
Morgan Marcuccilli1, Jessica Kendrick1,2, Michel Chonchol3
1Division of Renal Diseases and Hypertension, University of Colorado, Aurora, CO, USA.
Insights
Managing sodium and fluid intake is crucial for chronic kidney disease (CKD) patients. This review explores evidence and barriers for sodium restriction and fluid management in CKD care.
Area of Science:
- Nephrology
- Internal Medicine
- Public Health
Background:
- Chronic kidney disease (CKD) affects over 28 million Americans, posing a significant global health challenge.
- While traditional risk factors like hypertension are treated, the role of sodium and fluid management in CKD progression remains under-explored.
- Pharmacologic agents like renin-angiotensin system (RAAS) blockers are established, but conservative therapies require further investigation.
Purpose of the Study:
- To review existing evidence on the benefits of sodium restriction and fluid management in patients with CKD.
- To explore the underlying mechanisms and clinical barriers associated with implementing sodium and fluid management strategies.
- To highlight the need for more randomized controlled trials in this area.
Main Methods:
- Literature review of experimental and observational studies on sodium restriction and fluid intake in CKD.
- Analysis of existing data regarding hypertension and cardiovascular outcomes related to sodium intake.
- Examination of studies concerning fluid management in specific kidney conditions like polycystic kidney disease and nephrolithiasis.
Main Results:
- Sodium restriction (≤2.3 g/day) shows promise for improving hypertension and cardiovascular outcomes in observational studies.
- Evidence for sodium reduction's direct benefit on CKD prevention or progression via randomized controlled trials is limited.
- Fluid intake has shown benefits in polycystic kidney disease and nephrolithiasis, but lacks randomized controlled trial data for general CKD patients.
Conclusions:
- Sodium restriction and fluid management are critical conservative therapies for CKD patients.
- Further high-quality randomized controlled trials are needed to establish definitive benefits and guidelines for sodium and fluid management in CKD.
- Understanding and overcoming clinical barriers is essential for effective implementation of these management strategies.
Abstract:
Chronic kidney disease (CKD) imposes a significant global health burden. In the United States, one in three adults are at risk for CKD currently affecting over 28 million Americans. While several studies have demonstrated the benefit of treating traditional risk factors in CKD, including hypertension with pharmacologic agents such as blockade of the renin-angiotensin system (RAAS), there is scarce data on the advantages of sodium and fluid management in this population. Both experimental and observational studies have shown improvement in hypertension and cardiovascular outcomes with sodium restriction to ≤2.3 grams per day, however, to date there are very few randomized controlled trials demonstrating a benefit in sodium reduction for the prevention or progression of CKD. Similarly, studies on increasing fluid consumption have shown to be advantageous in polycystic kidney disease as well as chronic nephrolithiasis, yet no randomized controlled trials exist on the fluid management in patients with kidney disease. This review aims to explore the evidence of sodium restriction and fluid management in the CKD population as well as underlying mechanisms and clinical barriers of sodium and water management as conservative therapy.
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