For more than a generation haemodialysis has been the principal method of treating patients with both acute and chronic renal failure. Initially, developments and improvements in the system were highly technical and relevant to only a relatively small number of specialists in nephrology. More recently, as advances in therapy have dem­ onstrated the value of haemofiltration in the intensive therapy unit and haemoperfusion for certain types of poisoning, the basic principles of haemodialysis have been perceived as important in many areas of clinical practice. In this volume, the potential advantages of bicarbonate haemo­ dialysis are objectively assessed, the technical and clinical aspects of both haemofiltration and haemoperfusion discussed and the con­ tinuing problems associated with such extra corporeal circuits analysed. All the chapters have been written by recognized experts in their field. The increasing availability of highly technical facilities for appropriately selected patients should ensure that the information contained in the book is relevant not only to nephrologists but to all practising clinicians. ABOUT THE EDITOR Dr Graeme R. D. Catto is Professor in Medicine and Therapeutics at the University of Aberdeen and Honorary Consultant Phy­ sician/Nephrologist to the Grampian Health Board. His current inter­ est in transplant immunology was stimulated as a Harkness Fellow at Harvard Medical School and the Peter Bent Brighton Hospital, Boston, USA. He is a member of many medical societies including the Association of Physicians of Great Britain and Ireland, the Renal Association and the Transplantation Society.