So Mi Kim1, Eun Kyoung Lee1, Shin Sook Kang2, Soon Mi Kim3, Hye-Won Kim4, Soon Bae Kim5. 1. Division of Nephrology, Department of Internal Medicine, Dankook University Hospital, Dankook University, College of Medicine, Cheonan, Republic of Korea. 2. Department of Dietetics and Nutrition Service, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea. 3. Department of Food and Nutrition, Gachon University, Seongnam, Republic of Korea. 4. Department of Nursing, Seoul Women's College of Nursing, Seoul, Republic of Korea. 5. Division of Nephrology, Department of Internal Medicine, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea. Email: sbkim@amc.seoul.kr.
Abstract
BACKGROUND AND OBJECTIVES: Restriction of dietary sodium intake for peritoneal dialysis (PD) patients is recommended, but there is limited information on the measurement and monitoring of sodium intake. We have developed a simple method to estimate daily sodium intake during the measurement of dialysis adequacy in PD patients. METHODS AND STUDY DESIGN: A total of 83 PD patients were enrolled in the study. The patients were divided into two groups based on residual renal function (RRF). We measured total sodium removal and estimated daily sodium intake using dietary recall for one day, during the assessment of dialysis adequacy. RESULTS: There were 39 patients in the RRF(-) group and 44 in the RRF(+) group. In both groups, and all patients, there were significant positive correlations between sodium intake and total sodium removal: RRF(-) group, r=0.598; RRF(+) group, r=0.577; total patients, r=0.595. There were linear relationships between dietary sodium intake and total sodium removal in both groups: RRF(-) group, sodium intake (mg/d) = 19.3 × peritoneal sodium removal (mEq/d) + 211;RRF(+) group, sodium intake (mg/d) = 15.4 × total sodium removal (mEq/d) + 609. All PD patients, sodium intake (mg/d) = 15.6 × total sodium removal (mEq/d) + 646. CONCLUSIONS: The measurement of total sodium removal during the assessment of dialysis adequacy could be an effective and simple method to estimate dietary sodium intake in PD patients. A dietary intake of 2,000 mg of sodium corresponds to a total sodium removal of approximately 87 mEq/d.
BACKGROUND AND OBJECTIVES: Restriction of dietary sodium intake for peritoneal dialysis (PD) patients is recommended, but there is limited information on the measurement and monitoring of sodium intake. We have developed a simple method to estimate daily sodium intake during the measurement of dialysis adequacy in PDpatients. METHODS AND STUDY DESIGN: A total of 83 PDpatients were enrolled in the study. The patients were divided into two groups based on residual renal function (RRF). We measured total sodium removal and estimated daily sodium intake using dietary recall for one day, during the assessment of dialysis adequacy. RESULTS: There were 39 patients in the RRF(-) group and 44 in the RRF(+) group. In both groups, and all patients, there were significant positive correlations between sodium intake and total sodium removal: RRF(-) group, r=0.598; RRF(+) group, r=0.577; total patients, r=0.595. There were linear relationships between dietary sodium intake and total sodium removal in both groups: RRF(-) group, sodium intake (mg/d) = 19.3 × peritoneal sodium removal (mEq/d) + 211;RRF(+) group, sodium intake (mg/d) = 15.4 × total sodium removal (mEq/d) + 609. All PDpatients, sodium intake (mg/d) = 15.6 × total sodium removal (mEq/d) + 646. CONCLUSIONS: The measurement of total sodium removal during the assessment of dialysis adequacy could be an effective and simple method to estimate dietary sodium intake in PDpatients. A dietary intake of 2,000 mg of sodium corresponds to a total sodium removal of approximately 87 mEq/d.