Filter delivery system
First Claim
1. A filter assembly comprising:
- a) a filter having a sleeve;
b) a plurality of legs extending distally from the sleeve and configured to form a filter, wherein each leg has a distally positioned hook configured to engage a vessel inner wall;
c) a delivery portion that includes a catheter with an outer surface, an inner surface and a lumen having at least one groove at a lumen distal end wherein each groove is configured for holding at least one leg hook and separating said leg hooks for preventing leg entanglement;
d) said catheter having a distal end portion;
e) each groove including a longitudinally extending surface positioned in between the catheter inner and outer surfaces and a transverse surface that extends between said longitudinally extending surface and said catheter inner surface; and
f) wherein each hook engages said transverse surface to prevent inadvertent longitudinal travel of said filter in a proximal direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A filter delivery device for implanting a vessel filter within a blood vessel of a patient'"'"'s body. The filter delivery device includes a mechanism for preventing hooks and/or legs on a vessel filter from entangling with each other while the vessel filter is loaded within the delivery device. In one variation, the filter delivery device includes a delivery catheter with grooves at the distal end lumen opening. When a vessel filter with radially expanding legs is compressed and inserted into the distal end of the delivery catheter, the hooks on the distal end of the legs are received and separated by the corresponding grooves on the delivery catheter. In another variation, a pusher rod, with a receptacle for receiving the hooks, is positioned within a delivery catheter to prevent the entanglement of the hooks and/or legs of a filter loaded within the delivery catheter.
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Citations
20 Claims
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1. A filter assembly comprising:
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a) a filter having a sleeve; b) a plurality of legs extending distally from the sleeve and configured to form a filter, wherein each leg has a distally positioned hook configured to engage a vessel inner wall; c) a delivery portion that includes a catheter with an outer surface, an inner surface and a lumen having at least one groove at a lumen distal end wherein each groove is configured for holding at least one leg hook and separating said leg hooks for preventing leg entanglement; d) said catheter having a distal end portion; e) each groove including a longitudinally extending surface positioned in between the catheter inner and outer surfaces and a transverse surface that extends between said longitudinally extending surface and said catheter inner surface; and f) wherein each hook engages said transverse surface to prevent inadvertent longitudinal travel of said filter in a proximal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A filter assembly comprising:
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a) a filter having a sleeve; b) a plurality of legs extending distally from the sleeve and configured to form a filter, c) wherein each leg has a distal anchor having a leg hook configured to engage a vessel inner wall; d) a plurality of arms extending distally from the sleeve, each said arm configured to expand to form a second filter; e) a delivery portion that includes a catheter having inner and outer surfaces, a distal end portion and a lumen having multiple circumferentially spaced apart grooves at a catheter distal end, wherein each groove is configured for holding at least one leg hook, said grooves separating the leg hooks and preventing leg entanglement, f) each groove including a longitudinal surface in between said catheter inner and outer surfaces, a transverse surface that extends from said longitudinal surface to said catheter inner surface, each leg hook having a curvature, said catheter including a tubing section; g) wherein each hook engages said transverse surface to prevent inadvertent longitudinal travel of said filter in a proximal direction; and h) a spline cap attached to the tubing section, wherein said cap contains the grooves; and i) a centering mechanism that comprises at least one loop and configured to center the catheter distal end.
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Specification