[Attempt to solve technical problems involved in the re-utilization of coil filters for hemodialysis]

The problem of the reutilization of coil filters in haemodialysis is discussed. The methodologies in current use are examined and the technical risks and inconveniences that limit any real economic advantage are pointed out. On the basis of these observations, a system of reutilization is proposed which does not call for any direct handling of the filter nor any special techniques for eliminating risks of transmitting infection, and cuts to the minimum extra work involving the use of hospital staff. The proposed equipment is illustrated in detail. It consists of a small accessory individual monitor which has opened the way to the concept of "weekly dialyser". Attention is called to the need for further research into the physiopathology of the regenerated membrane, particularly in relation to the type of filter, the number of reutilizations, and the behaviour of ultrafiltration and the various solutes.