A medical article for implantation into the vascular system of a patient

Claim 2

A medical filter as claimed in claim 1, characterized in that said body of revolution (1, 2; 10, 11; 18; 30) is defined by a generatrix (6) forming a n-th order curve according to the formula y = A•x n where for a given point on the surface of the body x is the radius in the radial plane including said point, y is the distance from said radial plane to a plane parallel thereto including the geometrical apex, A is a constant and n ≥ 1.

Claim 3

A medical filter as claimed in claim 1 or 2, characterized in that said cells are of a general rhombic shape.

Claim 4

A medical filter as claimed in claim 1, 2 or 3, characterized in that anchoring members (7, 17) for fixing the article to vascular walls is provided at the circumference of said base.

Claim 5

A medical filter as claimed in any of the preceding claims, characterized in that it is provided with wire members (8) extending substantially diametrically across said base and being connected with each other at the centre to function as extraction members.

Claim 6

A medical filter as claimed in any of the preceding claims, characterized in that it comprises two bodies of revolution (1, 2; 10,11; 30) connected at their apices (4, 13).

Claim 7

A medical article as claimed in claim 2 and any of claim 3 to 6, characterized in that said body or bodies of revolution (1, 4; 10,11; 18; 30) is of a generally parabolic shape with 1 < n ≤ 2.

Claim 8

A medical occlusion device for implantation into the vascular system of a patient for closing a vessel lumen or defects in a vascular wall, comprising a self expanding body shaped substantially into the form of a body of revolution, the surface of which is defined by wire members forming cells of a generally polygonal shape over at least a part of the said surface, characterized in that said body of revolution (1, 2; 10, 11; 18; 30) has a diameter increasing continuously in an axial direction of the body from one end forming an apex (4, 13) towards the opposite end forming a base (5, 14), and that a separate relatively flat disc or umbrella shaped, elastic membrane (16, 19, 32) of a blood impermeable material is connected with said one end of said body of revolution (10,11; 18;30) and is coaxially therewith, said membrane (16, 19, 32) having a diameter (d 2 ) exceeding the maximal diameter (d 1 ) at the base of 'said body.

Claim 9

A medical occlusion device as claimed in claim 8, characterized in that said body of revolution (1, 2; 10, 11; 18; 30) is defined by a generatrix (6) forming a n-th order curve according to formula y = A•x n where for a given point on the surface of the body x is the radius in the radial plane including said point, y is the distance from said radial plane to a plane parallel thereto including the geometrical apex, A is a constant and n ≥ 1.

Claim 10

A medical occlusion device as claimed in claim 8 or 9, characterized in that said cells are of a generally rhombic shape.

Claim 11

A medical occlusion device as claimed in claim 8, 9 or 10, characterized in that said membrane (7, 17) of fixing the article to vascular walls is provided at the circumference os said base.

Claim 12

A medical occlusion device as claimed in any of claims 8 to 11, characterized in that it comprises two bodies of revolution (1, 2; 10, 11; 30) connected at their apices (4, 13).

Claim 13

A medical occlusion device as claimed in claim 9 and any of claims 10 to 12, characterized in that said body or bodies of revolution (1, 4; 10, 11; 18; 30) is of a generally parabolic shape with 1 < n ≤ 2.

Claim 14

A medical occlusion device as claimed in claim 8, characterized in that said membrane (16, 19, 32) is connected with the apical end (4, 13) of said body revolution (10, 11; 18; 30).

Claim 15

A medical occlusion device as claimed in claim 8 or 9, characterized in that said cells are of a generally pentagonal or hexagonal shape.

Claim 16

A medical occlusion device as claimed in any of claims 8 to 15, characterized in that said membrane (16, 19, 32) is connected with said body or bodies of revolution (10, 11; 18; 30) through a flexible link (15).

Claim 17

A medical occlusion device as claimed in any of claims 8 to 16, characterized in that said membrane (16, 19, 32) is formed from a porous film or non-woven fabric of polyurethane, polyamide or PTFE.

Claim 18

A medical occlusion device as claimed in any of claims 8 to 14, 16 and 17, characterized in that it comprises a single body of revolution (18) connected at its apical end with an umbrella-link supporting structure (20) for said membrane (19).

Claim 19

A medical occlusion device as claimed in claim 18, characterized in that said membrane (16, 32) is arranged between said bodies (10, 11; 30).

Claim 20

A medical occlusion device as claimed in claim 19, characterized in that said two bodies of revolution (30) have their apical ends axially separated and connected by a flexible wire member (31) to which said membrane (32) is fixed.

Claim 21

A medical occlusion device as claimed in claim 19, characterized in that an injection catheter (39) is arranged to extend substantiable axially through said bodies of revolution (40, 41).