US20030171774A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implant for the closing of defect openings in the body of a human or animal and a system for the placement of such an implant
Assignee: PFM Medical AG
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Filing: 2001-01-03
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Granted: —
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Expires: 2021-01-03
Abstract
Abstract An implant for the closing of defect openings in the body of a human or animal is proposed, with a load-bearing structure which, in a first operating state (primary form), has a great ratio of length to transverse extent along an axis ( 9 ) and, at least in a further operating state (secondary form), has a much smaller ratio of length to transverse extent along the axis ( 9 ), the load-bearing structure ( 1 ) being capable of being reversibly transformed from the secondary form into the primary form by exertion of a force against elastic material forces, the secondary form assuming approximately the form of a double disc with a proximal disc element ( 7 ) and a distal disc element ( 6 ) for receiving the surroundings of the defect opening between the disc elements, and the load-bearing structure ( 1 ) being formed essentially in one piece without joining connections, and a placement system.
Inventors
- 👤 Franz Freudenthal
- 👤 Georg Siegner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/0057; A61B2017/00575; A61B2017/00592; A61B2017/00597; A61B2017/00606; A61B2017/00619
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
154 words
1 . Implant for the closing of defect openings in the body of a human or animal, with a load-bearing structure which, in a first operating state (primary form), has a great ratio of length to transverse extent along an axis ( 9 ) and, at least in a further operating state (secondary form), has a much smaller ratio of length to transverse extent along the axis ( 9 ), the load-bearing structure ( 1 ) being capable of being reversibly transformed from the secondary form into the primary form by exertion of a force against elastic material forces, the secondary form assuming approximately the form of a double disc with a proximal disc element ( 7 ) and a distal disc element ( 6 ) for receiving the surroundings of the defect opening between the disc elements, and the load-bearing structure ( 1 ) being formed essentially in one piece without joining connections.
Claim 2
Dependent Claim
154 words
1 . Implant for the closing of defect openings in the body of a human or animal, with a load-bearing structure which, in a first operating state (primary form), has a great ratio of length to transverse extent along an axis ( 9 ) and, at least in a further operating state (secondary form), has a much smaller ratio of length to transverse extent along the axis ( 9 ), the load-bearing structure ( 1 ) being capable of being reversibly transformed from the secondary form into the primary form by exertion of a force against elastic material forces, the secondary form assuming approximately the form of a double disc with a proximal disc element ( 7 ) and a distal disc element ( 6 ) for receiving the surroundings of the defect opening between the disc elements, and the load-bearing structure ( 1 ) being formed essentially in one piece without joining connections.
Claim 3
Dependent Claim
28 words
2 . Implant according to claim 1 , characterized in that the load-bearing structure is formed by a tube ( 1 ) slit over part of its length.
Claim 4
Dependent Claim
22 words
3 . Implant according to claim 2 , characterized in that the tube ( 1 ) consists of a metallic shape-memory material.
Claim 5
Dependent Claim
51 words
4 . Implant according to either of claims 2 and 3 , characterized in that strips ( 2 ) are formed along the slit part of the length along the tube ( 1 ), with the width of the strips varying along the slit part of the tube ( 1 ).
Claim 6
Dependent Claim
57 words
5 . Implant according to one of claims 2 to 4 , characterized in that strips ( 2 ) are formed along the slit part of the length along the tube ( 1 ), with holes ( 3 ) being formed in the strips, at least partly along the slit part of the tube ( 1 ).
Claim 7
Dependent Claim
57 words
6 . Implant according to one of claims 2 to 5 , characterized in that strips ( 2 ) are formed along the slit part of the length along the tube ( 1 ), with the strips arranged spirally with respect to the axis ( 9 ) of the implant, at least over part of their length.
Claim 8
Dependent Claim
65 words
7 . Implant according to one of claims 2 to 6 , characterized in that strips ( 2 ) are formed along the slit part of the length along the tube ( 1 ), with the mutually facing contours of respectively neighbouring strips ( 2 ) formed in such a way as to be complementary to one another, at least along part of their length.
Claim 9
Dependent Claim
68 words
8 . Implant according to one of claims 2 to 6 , characterized in that strips ( 2 ) are formed along the slit part of the length along the tube ( 1 ), with the mutually facing contours of respectively neighbouring strips ( 2 ) being formed in such a way as to be mirror-inverted in relation to one another, at least along part of their length.
Claim 10
Dependent Claim
63 words
9 . Implant according to one of the preceding claims, characterized in that the load-bearing element ( 1 ) has a variable rigidity along part of its length, the rigidity being less in particular in the region in which the proximal disc element ( 7 ) is formed than in the region in which the distal disc element ( 6 ) is formed.
Claim 11
Dependent Claim
31 words
10 . Implant according to claim 9 , characterized in that the surface of the load-bearing element ( 1 ) is etched and/or electrochemically polished in the region of reduced rigidity.
Claim 12
Dependent Claim
89 words
11 . Implant according to one of the preceding claims, characterized in that strips ( 2 ) are formed along a slit part of the length along the tube ( 1 ), with a strip ( 2 ) in the secondary form describing along the axis ( 9 ) from the proximal end ( 13 ) of the implant an arc which is open in the direction of the axis ( 9 ) and is adjoined towards the distal end ( 12 ) in opposed curvature by a loop.
Claim 13
Dependent Claim
58 words
12 . Implant according to one of claims 5 to 11 , characterized in that one or more membranes ( 8 ) are fastened to at least some of the holes ( 3 ) in the strips ( 2 ) at least for covering the proximal disc element ( 6 ) in the secondary form of the implant.
Claim 14
Dependent Claim
39 words
13 . Implant according to claim 12 , characterized in that said one or more membranes are formed by a stringing ( 21 ) of metallic wire or yarn, preferably in a helix arrangement when assuming the secondary form.
Claim 15
Dependent Claim
85 words
14 . Implant according to one of the preceding claims, characterized in that the load-bearing element ( 1 ) has at its proximal end ( 13 ) and its distal end ( 12 ) in each case at least one through-hole, which are arranged approximately in line with one another and approximately on the axis ( 9 ), and the hole ( 14 ) at the distal end ( 12 ) having a smaller diameter than the hole at the proximal end ( 13 ).
Claim 16
Dependent Claim
47 words
15 . Implant according to one of the preceding claims, characterized in that the load-bearing element ( 1 ) has at its proximal end ( 13 ) at least one eyelet ( 16 ) for the fastening of holding elements ( 17 ) of a placement system.
Claim 17
Dependent Claim
94 words
16 . Implant according to one of the preceding claims, characterized in that the load-bearing structure is formed by a tube ( 1 ) slit over two portions of part of its length, so that an unslit portion ( 26 ) remains approximately in the middle of the tube ( 1 ), and in the secondary form the proximal disc element ( 7 ) and the distal disc element ( 6 ) are respectively formed on one side of the unslit portion for receiving the surroundings of the defect opening between the disc elements.
Claim 18
Dependent Claim
48 words
17 . Implant according to claim 16 , characterized in that the unslit portion ( 26 ) comprises a hollow passageway in general along the axis ( 9 ) of the tube ( 1 ), having a predetermined cross sectional area allowing a desired shunt flow when implanted.
Claim 19
Dependent Claim
22 words
18 . Use of an implant according to one of claims 1 to 11 or 14 to 17 as a vascular filter.
Claim 20
Dependent Claim
114 words
19 . Placement system, in particular for an implant according to one of claims 1 to 18 , with a stretching element ( 18 ) and at least one, preferably two, holding wires ( 17 ), the stretching element ( 18 ) serving for interacting with a distal end ( 12 ) of an implant and the holding wire or wires ( 17 ) serving for interacting with a proximal end ( 13 ) of an implant, the implant being capable of being transformed from a primary form into a secondary form and vice versa by relative movement of the holding wires ( 17 ) in relation to the stretching element ( 18 ).
Claim 21
Dependent Claim
111 words
20 . Placement system according to claim 19 , in particular for an implant according to one of claims 1 to 17 , in which the stretching element is formed by a stretching cannula ( 18 ), and which furthermore has a guiding wire ( 19 ) led through the stretching cannula ( 18 ), and at least one, preferably two, holding wires ( 17 ), with the implant being capable of being transformed from a primary form into a secondary form and vice versa by relative movement of the holding wires ( 17 ) in relation to the stretching cannula ( 18 ) along the guiding wire ( 19 ).
Claim 22
Dependent Claim
54 words
21 . Placement system according to either of claims 19 and 20 , characterized in that the stretching element ( 18 ) is intended to interact with a loss-preventing means provided at the distal end ( 12 ) of an implant, preventing unintentional separation of the implant from the stretching element ( 18 ).
Claim 23
Dependent Claim
202 words
22 . Placement system, in particular for an implant according to one of claims 1 to 18 , with a stretching element ( 18 ) and at least one holding wire ( 17 ), the stretching element ( 18 ) serving for interacting with an end ( 12 , 13 ) of an implant, the implant being capable of being transformed from a primary form into a secondary form and vice versa, and which furthermore has one or more guiding wires ( 19 ) led in general through the implant and at least one guiding wire ( 19 ) is led through a loop formed in the holding wire ( 17 ), wherein at least one of the guiding wires ( 19 ) is led over a part of the length of the implant over the outer circumference of the same and the holding wire or wires ( 17 ) serving for interacting with at least one of the guiding wires ( 19 ) so that the implant is secured to the placement system unless the guiding wires ( 19 ) or the holding wire or wires ( 17 ) are removed, preventing unintentional separation of the implant from the placement system.
Claim 24
Dependent Claim
50 words
23 . Placement system according to one of claims 20 to 22 , characterized in that the stretching element ( 18 ) is formed by a section of a guiding wire ( 19 ) having a larger cross sectional dimension than the remainder of the guiding wire ( 19 ).
Claim 25
Dependent Claim
49 words
24 . Implant according to one of claims 14 to 17 , characterized in that the distal end ( 12 ) and/or the proximal end ( 13 ) of the implant are configured to allow, when implanted, proper grasping by a snare type probe for removal of the implant.
Claim 26
Dependent Claim
43 words
25 . Use of a device according to one of claims 1 to 17 and optionally a placement system according to one of claims 19 to 24 for removal of stones or other agglomerates or foreign bodies from a human or animal body.
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