Anti-embolic filter
First Claim
1. An anti-embolic filter for implantation in a physiological canal, said filter comprising a single flexible wire, and means connected with said wire for anchoring said filter in a physiological canal, said wire having been subjected to a primitive predeformation into first and second substantially flat superposed loops, said loops being substantially symmetrical respectively with regard to two axes which are substantially orthogonal and convergent at a centre of said filter.
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Accused Products
Abstract
The filter is particularly for implantation in the interior vena cava by sliding through a small sized catheter of type 7F, so as to arrest the migration of all thrombi of dangerous size. The filter comprises a flexible wire having been subjected to a primitive predeformation into first and second substantially flat superposed loops. The loops are substantially symmetrical respectively with regard to two axes which are substantially orthogonal and convergent at a center of the filter. These loops can be elliptic and inscribed in a square, thus providing four contact points with the venous wall, which are in two-to-two symmetry with regard to the center on the longitudinal axis of the vein, which gives the filter high stability in the vein.
413 Citations
21 Claims
- 1. An anti-embolic filter for implantation in a physiological canal, said filter comprising a single flexible wire, and means connected with said wire for anchoring said filter in a physiological canal, said wire having been subjected to a primitive predeformation into first and second substantially flat superposed loops, said loops being substantially symmetrical respectively with regard to two axes which are substantially orthogonal and convergent at a centre of said filter.
- 19. A cylindrical pusher member intended to slide in a catheter and to receive a small revolution weight on a free extremity of a predetermined flexible wire constituting an anti-embolic filter, said pusher comprising from an extremity, a first longitudinal groove for receiving a short length of said filter wire behind said revolution weight, and a longitudinal notch connected with said groove for receiving said revolution weight whereby said weight be completely embedded in said pusher.
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21. A cylindrical pusher member intended to slide in a catheter and to receive a free extremity of a predeformed flexible wire constituting an anti-embolic filter, said wire extremity comprising a small revolution weight prolonged by a tip, and said pusher comprising from an extremity, a first longitudinal groove for receiving a short length of said filter wire behind said revolution weight, a longitudinal notch connected with said first longitudinal groove for receiving said revolution weight whereby said weight be completely embedded in said pusher, and a second groove colinear with said first groove and emerging into said notch for receiving said tip prolonging said revolution weight.
Specification