Medical instrument, ring prosthesis, stent and stented valve
First Claim
1. A stent, comprising:
- a tubular element with an open grid structure which is radially expandable from a compressed condition to an expanded condition, and which has a proximal and distal end; and
a ring structure provided around the tubular element,wherein the tubular element and ring structure are interconnected,wherein the ring structure is a variable-diameter ring structure with distal and proximal flange feet,wherein the ring structure has an axial direction and a radial direction disposed transverse to the axial direction,wherein the ring structure is constructed from a series of elongated closed loops lying next to one another which, in each case, at the midpoint of the longitudinal sides of the loops, are attached laterally to one another via a junction to form the ring structure, in such a way that a) an imaginary center line through all junctions forms a closed ring and divides each loop into a distal flange foot of said distal flange feet and a proximal flange foot of said proximal flange feet, and b) the ring structure is expandable,wherein the distal and proximal flange feet each have a fixed end arranged at the imaginary center line and a free end pointing away from the imaginary center line,wherein the distal and proximal flange feet have a radial position, in which the free ends of the flange feet point in the radial direction,wherein the distal and proximal flange feet have an extended position, in which the distal and proximal flange feet extend in the axial direction,wherein the distal flange feet and the proximal flange feet lie in a longitudinal direction of the tubular element when the tubular element is in the compressed condition and the distal and proximal flange feet are in the extended position,wherein the distal and proximal flange feet, when in the extended position, are under a pre-tension, which, upon release, bends the distal and proximal flange feet from the extended position to the radial position,wherein, in the extended position, the free ends of the distal flange feet point in the distal direction whilst the free ends of the proximal flange feet point in the proximal direction such that, after the distal and proximal flange feet have bent from the extended position to the radial position, the distal and proximal flange feet interact to clamp surrounding tissue between the distal and proximal flange feet, andwherein the distal flange feet, at the fixed ends of the distal flange feet, have a concave-curved part including a hollow side facing toward the proximal flange feet, and in the hollow side of the concave-curved part, a filling is provided that is configured to increase a clamping force with which the distal and proximal flange feet clamp the tissue in situ when the distal and proximal flange feet are in the radial position.
1 Assignment
0 Petitions
Accused Products
Abstract
The medical instrument includes: a first rod; a second rod which extends along the first rod; a longitudinal center line defined by the rods; and a manipulator. The manipulator includes a plurality of fingers, each with a first finger end and a second finger end. The second finger ends are free ends. The first finger ends are supported on the second rod in such a way that the fingers are operable, by moving the second rod in relation to the first rod, in order to be displaced from a first position to a second position. The distance from the free ends of the fingers to the longitudinal center line in the first position is different compared with the second position. A stent, a ring prosthesis and a prosthesis device are also described.
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Citations
36 Claims
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1. A stent, comprising:
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a tubular element with an open grid structure which is radially expandable from a compressed condition to an expanded condition, and which has a proximal and distal end; and a ring structure provided around the tubular element, wherein the tubular element and ring structure are interconnected, wherein the ring structure is a variable-diameter ring structure with distal and proximal flange feet, wherein the ring structure has an axial direction and a radial direction disposed transverse to the axial direction, wherein the ring structure is constructed from a series of elongated closed loops lying next to one another which, in each case, at the midpoint of the longitudinal sides of the loops, are attached laterally to one another via a junction to form the ring structure, in such a way that a) an imaginary center line through all junctions forms a closed ring and divides each loop into a distal flange foot of said distal flange feet and a proximal flange foot of said proximal flange feet, and b) the ring structure is expandable, wherein the distal and proximal flange feet each have a fixed end arranged at the imaginary center line and a free end pointing away from the imaginary center line, wherein the distal and proximal flange feet have a radial position, in which the free ends of the flange feet point in the radial direction, wherein the distal and proximal flange feet have an extended position, in which the distal and proximal flange feet extend in the axial direction, wherein the distal flange feet and the proximal flange feet lie in a longitudinal direction of the tubular element when the tubular element is in the compressed condition and the distal and proximal flange feet are in the extended position, wherein the distal and proximal flange feet, when in the extended position, are under a pre-tension, which, upon release, bends the distal and proximal flange feet from the extended position to the radial position, wherein, in the extended position, the free ends of the distal flange feet point in the distal direction whilst the free ends of the proximal flange feet point in the proximal direction such that, after the distal and proximal flange feet have bent from the extended position to the radial position, the distal and proximal flange feet interact to clamp surrounding tissue between the distal and proximal flange feet, and wherein the distal flange feet, at the fixed ends of the distal flange feet, have a concave-curved part including a hollow side facing toward the proximal flange feet, and in the hollow side of the concave-curved part, a filling is provided that is configured to increase a clamping force with which the distal and proximal flange feet clamp the tissue in situ when the distal and proximal flange feet are in the radial position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A stent, comprising:
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a tubular element with an open grid structure which is radially expandable from a compressed condition to an expanded condition, and which has a proximal and distal end; and a ring structure provided around the tubular element, wherein the tubular element and ring structure are interconnected, wherein the ring structure is a variable-diameter ring structure with distal and proximal flange feet, wherein the ring structure has an axial direction and a radial direction disposed transverse to the axial direction, wherein the ring structure is constructed from a series of elongated closed loops lying next to one another which, in each case, at the midpoint of the longitudinal sides of the loops, are attached laterally to one another via a junction to form the ring structure, in such a way that a) an imaginary center line through all junctions forms a closed ring and divides each loop into a distal flange foot of said distal flange feet and a proximal flange foot of said proximal flange feet, and b) the ring structure is expandable, wherein the distal flange feet and the proximal flange feet each have a fixed end arranged at the imaginary center line and a free end pointing away from the imaginary center line, wherein the distal and proximal flange feet have a radial position, in which the free ends of the flange feet point in the radial direction, wherein the distal and proximal flange feet have an extended position, in which the distal and proximal flange feet extend in the axial direction, wherein the distal flange feet and proximal flange feet lie in a longitudinal direction of the tubular element when the tubular element is in the compressed condition and the distal and proximal flange feet are in the extended position, wherein the distal and proximal flange feet, when in the extended position, are under a pre-tension, which, upon release, bends the distal and proximal flange feet from the extended to the radial position, wherein, in the extended position, the free ends of the distal flange feet point in the distal direction whilst the free ends of the proximal flange feet point in the proximal direction such that, after the distal and proximal flange feet have bent from the extended position to the radial position, the distal and proximal flange feet interact to clamp surrounding tissue between the distal and proximal flange feet, and wherein the proximal flange feet, at the fixed ends of the proximal flange feet, have a concave-curved part including a hollow side facing toward the distal flange feet, and provided in the hollow side of the concave-curved part is a filling which is configured to increase the clamping force with which the distal and proximal flange feet clamp the tissue in situ when the distal and proximal flange feet are in the radial position. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification