This text presents the transactions of the Brooklyn meeting, held in April 1993, including an analysis by Scribner and Schreiner and an introduction by Edmund Bourke. Authors include the heads of dialysis registries for Japan, Europe, and the United States, as well as protagonists of dialyser reuse and short dialysis times. The book examines the view which champions the determination of adequacy of dialysis by formulae or by clinical assessment. The reader will be able to judge the data on key controversies in planning dialysis protocols and schedules.