A support frame for an embolic protection device

(57) The summary embolism prevention instrument 100 has the filter element 105 in which folding for delivering through a patient's vascular system is possible. The filter element 105 has the foldable main part 110 of a filter, and the filter support frame 111 which touches the main part 110 of a filter. The foldable main part 110 of a filter has an entrance end and an exit end, Blood and an embolism substance have an entrance end of the main part of a filter, and one or more entrance openings 117 of the size which can go into the main part 110 of a filter the exit end of the main part of a filter, Although passage of blood is permitted, it has two or more exit openings 119 of the size which holds the embolism substance which is not desirable in the main part 110 of a filter. The filter support frame 111 can be moved between the projection positions to the outside extended in order to support the main part 110 of a filter in the fold-up position and extended position for movement in a vascular system. When the main part 110 of a filter is on an arrangement extension form, elongation of the frame 111 is carried out to the direction of Nagate, and a transverse direction, and it has two or more engaging-of-clutch segments which arrange the main part 110 of a filter in a tube wall and the position which counters. An engaging-of-clutch segment demarcates a corkscrew shape-like engaging-of-clutch track substantially partially at least.