Abstract
Abstract BACKGROUND AND AIMS Preservation of residual kidney function (RKF) in maintenance haemodialysis (HD) patients is associated with better survival and quality of life. RKF may be better preserved with an incremental HD (frequency < 3x/week) regimen in patients starting HD. Since 2013, incremental HD is routinely used at our centre. METHOD Incremental HD was implemented in incident HD patients with a urine output of >600 mL/day, a urea clearance (KRU) ≥2 mL/min and an interdialytic weight gain < 2.5 kg. Patients were clinically assessed every week and a 24-h urine collection was ordered every other month in order to measure RKF. RESULTS From January 2013 to December 2020, 296 patients started chronic dialysis, with 162 on thrice-weekly HD, 63 on incremental HD and 71 on peritoneal dialysis (PD). Patients on incremental HD did not differ from those on thrice-weekly HD or PD in terms of age, gender and comorbidity score. Diuresis, eGFR and KRU at incremental HD initiation were 1842 ± 749 mL/day, 6.7 ± 3.1 mL/min and 4.0 ± 1.8 mL/min, respectively. Among patients on incremental HD, four could retrieve a sufficient RKF to become dialysis-independent and two were transplanted. Among the 57 remaining patients on incremental HD, median duration until transition to a thrice-weekly HD regimen or death was 10 (6–20) months. Within the first year of dialysis, median survival and hospital-free days were higher in patients starting with incremental HD as compared with thrice-weekly HD: 91% versus 77%, P = 0.02 and 348 (316–362) versus 338 (295–354) days; P = 0.03. CONCLUSION These preliminary results show that incremental HD can be implemented in incident HD patients as long as regular clinical and RKF assessments are found adequate. A median duration of 10 months before transition to thrice-weekly HD can be expected in this setting. Results of randomised clinical trials assessing long-term survival and quality of life in incremental HD are awaited prior to its large-scale implementation.
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