Kit for medical use composed of a filter and a device for placing it in the vessel

Claim 1

A kit for medical use, comprising a filter adapted to be inserted into a vein, a flexible metal guide, a push-rod and an insertion tube, in which a) the filter, which includes radially expandable elastic lugs each having a distal end and a proximal end, said distal ends of said lugs extending outwardly approximately in a shape of a conical corolla, said distal ends of said lugs are capable of being folded inwardly, said proximal ends of said lugs are joined at a head which has a small circular orifice of diameter D1 to receive said guide, b) the metal guide formed from a flexible wire has a cross-sectional diameter D2, c) the push-rod having a distal end is a hollow tube of internal diameter D3, and receives said guide therein, d) the insertion tube having a distal end is hollow and surrounds said push-rod, wherein said distal end of said lugs are capable of being folded inwardly and received in said distal end of said insertion tube; said distal end of said insertion tube having a rigid cylindrical cap of internal diameter D4, said cap having an annular internal shoulder at a distal end, which is capable of acting as a stop for said distal end of the lugs of the filter, diameters of each component being such that D4>D3>D1>D2, such that when said distal ends of said lugs are folded back inside said cap, the distal end of said push rod bears against said head.