SEATTLE—Residual renal function (RRF) may help to improve nutritional status, anemia, and calcium-phosphate metabolism in patients on maintenance hemodialysis (HD), according to findings presented at the 2016 Annual Dialysis Conference.

The findings are from a study of 120 maintenance HD patients by Wenly Lyu, MD, and colleagues from Fudan University in Shanghai, China. The investigators classified patients as RRF+ if their RRF was 1 mL/min/1.73 m2 or higher (48 patients) or RRF− if RRF was less than 1 mL/min/1.73 m2 (72 patients).

The 120 patients had a 24-hour residual urine volume of 489.54 mL and an average urea nitrogen clearance rate of 1.52 mL/min. The blood albumin level and hemoglobin levels were significantly higher in the RRF+ than the RRF− patients (36.21 vs. 34.25 g/L and 109 vs. 105 g/L, respectively), the researchers reported.  In addition, the RRF+ group had significantly higher proportions of patients with serum calcium levels between 2.0 and 2.5 mmol/L (33.3% vs. 27.7%), serum phosphorus levels less than 1.5 mmol/L (37.5% vs. 33.3%), and parathyroid hormone levels below 300 pg/mL (41.6% vs. 38.8%).