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Nephrology Dialysis Transplantation, Vol 12, Issue 11 2349-2354, Copyright © 1997 by Oxford University Press

ORIGINAL ARTICLES

Individualized anticoagulation with dermatan sulphate for haemodialysis in chronic renal failure

P Boccardo, D Melacini, S Rota, G Mecca, A Boletta, F Casiraghi and F Gianese
Mario Negri Institute for Pharmacological Research, Villa Camozzi, I-24020 Ranica, Bergamo, Italy; Division of Nephrology and Dialysis, Azienda Ospedaliera Ospedali Riuniti, Bergamo, Italy; Medical Department, Mediolanum Farmaceutici, Milano, Italy; Corresponding author

Background: Dermatan sulphate (DS) is a selective thrombin inhibitor with antithrombotic properties and low bleeding potential. In preliminary studies it was reported to be effective for preventing clot formation in the haemodialysis circuit. Methods: Ten patients on maintenance haemodialysis for chronic renal failure underwent three consecutive investigation phases. In phase 1 (individual dose titration), repeated dialyses were preformed with increasing doses of DS until successful dialysis was obtained in two sessions at the same dose. In phase 2, individualized DS doses were validated by a randomized crossover comparison with the individual heparin dose of each patient. In phase 3, each patient underwent 24 consecutive dialyses with DS over 8 weeks. Successful dialysis was defined as completion of the procedure without visible clot formation in the bubble traps and lines or a greater than 20% decrease in dialyser capacity. Dialysis efficiency (decrease in serum urea and creatinine, Kt/V), APTT prolongation, bleeding time, and DS plasma concentrations were also assessed. Results: Phase 1: successful dialysis was achieved in nine patients with 4 mg/kg DS as a predialysis intravenous bolus followed by continuous infusion of 0.65 mg/kg/h. One patient required 5 mg/kg plus 1.3 mg/kg/h. Phase 2: no statistically significant differences were found between DS and heparin in any of the investigated variables. Residual dialyser capacity and dialysis efficiency indexes indicated equivalent efficacy. Phase 3: residual dialyser capacity and dialysis efficiency did not change with time. There was no accumulation of DS in plasma. No bleeding or thrombocytopenia were observed. Conclusions: The dose of DS can be individually titrated to suppress clot formation during haemodialysis as efficiently as with individualized heparin. Such an individualized DS regimen maintains its anticoagulant efficacy and is safe in prolonged use. Key words: anticoagulation; clinical trial; dermatan sulphate; haemodialysis; heparin
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