The group of useful inventions concerns the field of medical technology, more specially to surgical instruments for catching of thromoemboli and to devices for their transport to an installation site. The a set for
preventive maintenance of a thromboembolism of a
pulmonary artery comprises a filter and a mounting device for its installation and extraction. In the mounting device for the installment of the filter the pusher (3) is provided with a movement limiting stop (4), and its working block is made in the form of a
capsule (5) with an axially movable therein clamping
cartridge (6) and a mechanism for its movement. The working block (10) of the extractor device is made in the form of a casing (13) with an aperture and a loop extending therefrom in
perpendicular direction to the axis of the extractor. In the filter, the free ends (19, 20) of the fixing and centering elements are bent outwards. The threads (23) of both elements have an identical
radius of bend at the end (18). The free ends (20) of the centering element have blunted ends and are made in the form of a circular-arch segment preventing the blunted ends of the fully unfolded centering legs from touching the walls of the
vena cava and being directed to the centre of the lumen of the
vein. The free ends (19) of the fixing element (17) are provided with protective areas (20) located between the conical part and the bent outwards
fastener part and in parallel to the axis of the
vein.