Blood filter

A filter for removing decayed blood corpuscles, aggregations of blood corpuscles and foreign components from the blood, comprising a filter housing having an inlet and an outlet, said housing containing a dense packing of fibres having substantially the same diameter as the blood corpuscles, said packing consisting of at least one plastics thread of sufficient length to prevent said at least one plastics thread from being carried away by the blood and from being released from said packing, said at least one plastics thread being crimped and arranged to form a mesh having a mesh width functioning to allow healthy blood cells to pass therethrough, said at least one plastics thread being formed from a material which will repel healthy blood cells, said decayed blood cells and said aggregations of blood corpuscles having no negative electric potential and thereby becoming deposited on said packing.