Evaluation of reduced dialysis frequency using nutritional therapy

Area of Science:

• Nephrology
• Clinical Nutrition
• Renal Replacement Therapy

Background:

• Patients undergoing intermittent hemodialysis often require careful management of protein intake and dialysis frequency.
• Residual renal function in hemodialysis patients presents an opportunity for optimizing treatment protocols.

Purpose of the Study:

• To investigate the impact of modified dietary protein intake and essential amino acid supplementation on nitrogen balance and serum urea levels in hemodialysis patients.
• To assess the feasibility of reducing dialysis frequency in patients with residual renal function under specific nutritional therapy.

Main Methods:

• Seven patients on intermittent hemodialysis with residual renal function were studied under two protocols.
• Protocol 1: Weekly dialysis, 0.96 g/kg/day protein intake.
• Protocol 2: Weekly dialysis, 0.4 g/kg/day protein intake supplemented with 10 g/day essential amino acids. Subsequently, two patients continued Protocol 2 with bi-weekly dialysis.

Main Results:

• Protocol 2 demonstrated a positive corrected nitrogen balance between dialyses and a significant reduction in pre-dialysis serum urea nitrogen (SUN) compared to Protocol 1 (-33 +/- 7 mg/dl, P < 0.01).
• The nonurea space increased in six of seven patients during Protocol 2, indicating potential changes in body composition.
• Patients on bi-weekly dialysis with the Protocol 2 diet maintained positive nitrogen balance and showed further increases in nonurea space.

Conclusions:

• Nutritional therapy, specifically reduced protein intake with essential amino acid supplementation, can support adequate nitrogen balance in hemodialysis patients.
• Dialysis frequency may be reduced in select hemodialysis patients possessing residual renal function when combined with optimized nutritional strategies.
• These findings suggest a potential for personalized treatment adjustments in hemodialysis care.