Summary
In order to study the haemocompatibility of metal and carbon coatings, fibrinogen
adsorption and platelet adhesion to various coatings have been investigated.Two metallic
coatings titanium and zirconium, and two carbon coatings isotropic diamondlike and
isotropic graphite-like coatings, were prepared by plasma vapour deposition onto stainless
steel substrate. It has been shown that the adsorption of fibrinogen to metal and
carbon coatings and its post-adsorptive transition are dependent on both the material
properties and the fibrinogen environment. The adsorption of fibrinogen from human
plasma on titanium and zirconium coatings is similar to that on uncoated stainless
steel surface. Both carbon coatings adsorb much greater amount of fibrinogen from
plasma, and fibrinogen retention by carbon surfaces is also greater than by metal
surfaces. Increased numbers of adhered platelets have been found on both carbon coatings
in comparison to the metal materials, although this does not correlate with the amount
of adsorbed fibrinogen.
Keywords
Haemocompatibility - fibrinogen - adsorption - platelets - adhesion