Abstract
Surface charge effects on the newly developed penta-block copolymer and its derivatives of film-formed materials in plasma and of the glass beads column method using whole blood were examined. The results presented the mosaic-charge and the anionic materials as scarce platelet adhesion. By former Lee-White test the mosaic-charge and the cationic materials were good. These facts suggest the mosaic-charge material would become one of the ideal anti-thrombogenic materials.