Nutritional support in chronic renal failure: systematic review

Area of Science:

• Nephrology
• Clinical Nutrition
• Evidence-Based Medicine

Background:

• Chronic renal disease (CRD) management requires effective nutritional strategies.
• Assessing the evidence for nutritional support in CRD is crucial for treatment guidelines.
• Diabetic nephropathy progression necessitates careful dietary interventions.

Purpose of the Study:

• To systematically review and evaluate the scientific evidence quality for nutritional support in CRD patients.
• To establish graded recommendations based on the efficacy and effectiveness of nutritional interventions.
• To assess nutritional support's role in slowing disease progression and improving patient outcomes.

Main Methods:

• Comprehensive literature search of MEDLINE, EMBASE, Cochrane Library, and Healthstar databases (1975-1999).
• Initial screening of 593 studies, with 45 selected based on methodological quality.
• Expert review and consensus reached on the selected studies.

Main Results:

• Low and very low-protein diets with enteral supplements are recommended for most CRD patients and those with incipient diabetic nephropathy (Grade A).
• Protein-restricted diets are specifically indicated for type I diabetes mellitus with nephropathy (Grade A).
• Nutritional parameters improved in CRD patients receiving specific dietary interventions (Grade C).

Conclusions:

• Nutritional support, particularly protein-restricted diets, plays a vital role in managing CRD and diabetic nephropathy.
• Evidence supports the use of specific enteral supplements alongside low-protein diets for CRD.
• Dietary interventions can slow disease progression, improve patient status, and enhance survival in CRD.