An optical blood coagulation monitor and method. In the present invention, a porous base material is divided into plural functional regions and a material having different electromagnetic characteristics is filled in a pore of the porous base material of each functional region, to form a passive element or a wiring substrate. The equations define the attribute values and are based on relationships between the attribute and the attributes associated with the same type of object and different types of objects. The cart assembly is movable between an erect arrangement and a collapsed arrangement.