Abstract
The new modified HFK has three pairs of dialysate connectors on the side of HFK housing symmetrically so that we are able to change its effective surface area and dialysate flow length easily and repidly. In vitro studies were made with available nine ways of dialysate flow by utilizing two dialysate connectors (others should be closed with caps). VB 12 and Chrolide clearance were measured and compared respectively. Conclusion: In practise, modified HFK should have one dialysate inlet on the lower part of housing and three outlets on the opposite side so that the values of clearance are controlled easily.
