The present book relates to the scientific records of a workshop held in Patras, Greece, in June 1989, under the auspices and with financial support of the European Economic Communities (Concerted Action EUROBIOMAT - Hemocompatibility - of the Medical Research Programme, Project: 11.1.212). This concerted action promotes the collaboration on science and technology on the particular field of hemocompatible biomaterials: exchange of experts, scholarships and scientific workshops within the EC-member countries and COST countries such as Sweden, Finland, Turkey, Switzerland. The first part of this monography refers to the oral presentations of the par­ ticipants. The second part gives the book its unique character: the scientific discussion on updated aspects of protein adsorption of synthetic polymers in contact with blood. This second part is subdivided into nine chapters where specific topics were discussed freely, open-minded and even controversially. This book intends to elucidate recurrent questions concerning the initial event when blood contacts artificial surfaces. Young investigators will consider this book to be appropriate to get familiar with the scientific background and the most relevant techniques and methods.