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Ultrafiltration and Sodium Removal in Steady Concentration Peritoneal Dialysis: A Prospective, Multicenter,
Martin Wilkie1, Olof Heimbürger2,3, Charlotte de Leon4
1Sheffield Kidney Institute, Sheffield Teaching Hospitals NHS Trust, Sheffield, United Kingdom.
Journal of the American Society of Nephrology : JASN
|June 4, 2026
Summary
Steady concentration peritoneal dialysis (PD) with the Carry Life UF system improved fluid management, increasing ultrafiltration volume and sodium removal. This novel PD therapy proved safe and effective for home use over four weeks.
Area of Science:
- Nephrology
- Renal Replacement Therapy
- Peritoneal Dialysis
Background:
- Steady concentration peritoneal dialysis (PD) offers a novel approach to fluid management.
- Continuous ambulatory peritoneal dialysis (CAPD) is a standard treatment for end-stage renal disease.
Purpose of the Study:
- To compare the efficacy and safety of steady concentration PD using the Carry Life UF system against standard 2.5% dextrose CAPD.
- To evaluate fluid removal, solute transport, and glucose ultrafiltration efficiency in a home setting.
Main Methods:
- A prospective, multicenter, randomized, crossover study involving 19 adult PD patients.
- Patients underwent 4-week home treatment phases with either Carry Life UF or 2.5% dextrose CAPD.
- Primary outcome: difference in ultrafiltration (UF) volume over 5 hours; secondary outcomes: sodium removal and glucose UF efficiency.
Main Results:
- Carry Life UF significantly increased UF volume by a mean of 381 ml compared to control (p<0.001).
- Peritoneal sodium removal was greater with Carry Life UF (mean increase 43 mmol/exchange).
- Glucose UF efficiency was enhanced with Carry Life UF (mean increase 6.4 ml/g), with no unexpected adverse events.
Conclusions:
- Steady concentration PD with the Carry Life UF system is effective in increasing ultrafiltration and sodium removal.
- The Carry Life UF system is safe and well-tolerated for home PD use.
- This therapy represents a promising advancement in home-based peritoneal dialysis.
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