EP0797962A2
Expired / Lapsed
EP
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Areal implant
Assignee: Johnson and Johnson Medical GmbH
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Filing: 1997-03-13
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Granted: —
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Expires: 2017-03-13
Abstract
Abstract An areal implant, in particular for abdominal wall closure, has a flexible basic structure made from a knitted fabric comprising non-resorbable or slowly resorbable material or a combination of such materials. The knitted fabric of the basic structure is designed to stretch more than the tissue region destined to receive the implant below a critical force and stretch less than this tissue region above the critical force. The critical force lies below the highest load which is allowable for this tissue region. The basic structure is provided with a stiffening, synthetic resorbable material whose resorption time is less than that of the basic structure. <IMAGE>
Inventors
- 👤 Bernhard Dr. Hinsch
- 👤 Christian Dr. Walther
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:24
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/10; D04B21/12; A; A61; A61F; A61F2/00; A61F2/0063; A61L; A61L31/00; A61L31/04; A61L31/06; A61L31/14; A61L31/148; A61F2002/0068; A61F2250/00; A61F2250/0014; A61F2250/003; D10; D10B; D10B2509/00; D10B2509/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
143 words
Areal implant, in particular for abdominal wall closure, - with a flexible basic structure made from a knitted fabric comprising non-resorbable material or resorbable material, which has a resorption time of at least 60 days and/or an in vivo decrease in strength which leads to a tearing strength remaining after 30 days which is at least 10 % of the initial tearing strength, or a combination of such materials, - wherein the knitted fabric of the basic structure is designed to stretch more than the tissue region destined to receive the implant below a critical force and stretch less than this tissue region above the critical force, the critical force being below the highest load allowable for this tissue region, and - with a synthetic resorbable material, which stiffens the basic structure, whose resorption time is less than that of the basic structure.
Claim 2
Dependent Claim
130 words
Areal implant according to Claim 1, characterized in that the knitted fabric of the basic structure is constructed in such a way that a plunger pressing test carried out on an implant 100 cm 2 in area with semispherical plunger 50 mm in radius produces a plunger force-plunger path length diagram which corresponds to a force-length change diagram, in which the plunger force is at most 15 N up to 10 mm plunger path length, less than 50 N at 20 mm plunger path length, and less than 200 N at 30 mm plunger path length, and in which the plunger force for plunger path lengths of more than 30 mm increases sharply to a value between 200 N and 1000 N at a plunger path length of 38 mm.
Claim 3
Dependent Claim
24 words
Areal implant according to Claim 1 or 2, characterized in that the resorption time of the stiffening material is 2 days to 200 days.
Claim 4
Dependent Claim
27 words
Areal implant according to one of claims 1 to 3, characterized in that the areal weight of the basic structure is less than 50 g/m 2 .
Claim 5
Dependent Claim
31 words
Areal implant according to one of claims 1 to 4, characterized in that the knitted fabric has a honeycomb structure or approximate rectangular structure or approximate quadratic structure knitted from yarns.
Claim 6
Dependent Claim
29 words
Areal implant according to one of claims 1 to 4, characterized in that the knitted fabric has a structure as is shown in one of Figures 1 to 5.
Claim 7
Dependent Claim
30 words
Areal implant according to one of the preceding claims, characterized in that the knitted fabric has meshes with an inside width in the range from 1 mm to 8 mm.
Claim 8
Dependent Claim
27 words
Areal implant according to one of the preceding claims, characterized in that the stiffening material has resorbable yarns, preferably monofilaments and/or multifilaments, knitted into the basic structure.
Claim 9
Dependent Claim
31 words
Areal implant according to one of the preceding claims, characterized in that the stiffening material has a film which is applied to one side or both sides of the basic structure.
Claim 10
Dependent Claim
26 words
Areal implant according to one of the preceding claims, characterized in that the stiffening material has a coating applied to the material of the knitted fabric.
Claim 11
Dependent Claim
14 words
Areal implant according to Claim 10, characterized in that the coating comprises polyglactin 630.
Claim 12
Dependent Claim
51 words
Areal implant according to one of the preceding claims, characterized in that the stiffening material comprises a material which is selected from the following group of materials: polymers based on caprolactone, polyglycolide, polylactide, poly-p-dioxanone, lactide/glycolide copolymers, lactide/caprolactone copolymers, glycolide/ caprolactone copolymers, glycolide/poly-p-dioxanone copolymers, glycolide/poly-p-dioxanone/lactide copolymers, other copolymers of the listed materials.
Claim 13
Dependent Claim
22 words
Areal implant according to one of the preceding claims, characterized in that the material of the basic structure comprises polypropylene and/or polyester.
Claim 14
Dependent Claim
39 words
Areal implant according to one of the preceding claims, characterized in that the material of the basic structure comprises a material which is selected from the group of the following materials: polylactide, polyglycolide, lactide/glycolide copolymers, preferably polyglactin 910, poly-p-dioxanone.
Claim 15
Dependent Claim
21 words
Areal implant according to one of the preceding claims, characterized in that the material of the basic structure is not dyed.
Claim 16
Dependent Claim
17 words
Areal implant according to one of the preceding claims, characterized in that the stiffening material is dyed.
References Cited (Backward Citations)
No citation records indexed.
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