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The AN69 ST haemodialysis membrane, a new membrane resulting from coating polyethyleneimine upon the polyacrylonitrile surface, binds heparin. In patients at risk of bleeding, a pilot study has demonstrated the efficient anticoagulant effect of this heparin-coated membrane. Study design. In chronic haemodialyzed patients, we evaluated whether this anticoagulant effect can be validated in a controlled, prospective, open study. Pragmatically, we tested the hypothesis of no difference of the massive clotting rate in two groups of patients haemodialyzed either with 50% reduced standard doses of nonfractionated heparin using the heparin-coated AN69 ST or with a full dose of heparin (100%) using another type of dialysis membrane that does not bind heparin. Secondary objectives included evaluation of partial clotting, changes in haemoglobin levels, erythropoietin consumption and dialyzer performances.

The clinical evaluation of low-dose heparin in haemodialysis: a prospective study using the heparin-coated AN69 ST membrane