Filter for medical use
First Claim
1. A medical filter adapted to be implanted in a blood vessel of a patient through the endovenous route via a catheter, said blood vessel having a flow of blood therethrough and possible clots and an inner wall, said filter comprisingfiltering means adapted to open out in said vessel when positioned within the patient,said filtering means being formed without hooking means for engaging the inner wall of said vessel,and means for holding said filtering means in place with respect to the vessel,said holding means permitting temporary use of said filter and passage from a situation of temporary use wherein the filter may be withdrawn from the vessel to a situation of definitive use of the filter.
0 Assignments
0 Petitions
Accused Products
Abstract
A medical filter and catheter for positioning and using the filter, which filter is particularly intended to be implanted in a blood vessel such as the inferior vena cava through the endovenous route via a catheter. The filter has a filtering section which opens out inthe vessel when it is in position in the patient and which has no hooks for engaging the vessel wall. The filter has a holding section which holds the filter section in position in the vessel and which facilitates transition from a temporary use of the filter to definitive use.
573 Citations
16 Claims
-
1. A medical filter adapted to be implanted in a blood vessel of a patient through the endovenous route via a catheter, said blood vessel having a flow of blood therethrough and possible clots and an inner wall, said filter comprising
filtering means adapted to open out in said vessel when positioned within the patient, said filtering means being formed without hooking means for engaging the inner wall of said vessel, and means for holding said filtering means in place with respect to the vessel, said holding means permitting temporary use of said filter and passage from a situation of temporary use wherein the filter may be withdrawn from the vessel to a situation of definitive use of the filter.
-
11. A catheter for positioning and using a filter which is to be implanted in the blood vessel of a patient, said filter having filtering means adapted to open out from a folded condition in the vessel of the patient when positioned therein and holding means, said catheter presenting a proximal end and a distal end in which said filter is placed prior to implantation in the patient, said catheter comprising
a down-sheath, the distal end of which holds the filtering means non-opened out during the introduction of the filter and fixedly to contain the holding means during introduction and temporary use and withdrawal of the filter after temporary use and a pusher maneuverable from the proximal end of the catheter for expelling the holding means out of the down-sheath at its distal end in the case of definitive use of the filter.
Specification