EP0515324A1
Expired / Lapsed
EP
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A cardiac valve prosthesis, particularly for replacement of the aortic valve
Assignee: Sorin Biomedica Cardio SpA
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Filing: 1992-05-19
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Granted: —
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Expires: 2012-05-19
Abstract
Abstract A stentless prosthesis is made completely from material (10,12), for example bovine pericardium, other than valve material. The projection of the valve sleeve (10) allows any reparatory operations on surrounding tissues.
Inventors
- 👤 Franco Vallana
- 👤 Maria Curcio
- 👤 Carla Stacchino
- 👤 Stefano Rinaldi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415; A61F2220/00; A61F2220/0025; A61F2220/0075
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
20 words
A stentless cardiac valve prosthesis, characterised in that it includes valve leaflets (14) of material other than biological valve tissue.
Claim 2
Dependent Claim
20 words
A stentless cardiac valve prosthesis, characterised in that it includes valve leaflets (14) of material other than biological valve tissue.
Claim 3
Dependent Claim
22 words
A prosthesis according to Claim 1, characterised in that it is constituted substantially (10, 12) of material other than biological valve tissue.
Claim 4
Dependent Claim
26 words
A prosthesis according to Claim 1 or Claim 2, characterised in that the material is selected from the group constituted by biological tissue and synthetic material.
Claim 5
Dependent Claim
83 words
A prosthesis according to any one of Claims 1 to 3, characterised in that it comprises a valve sleeve made from two sheets of the said material (10, 12), of which one (12), intended to be on the inside of the sleeve, defines the prosthetic valve leaflets (14) while the other (10), intended be on the outside of the sleeve, constitutes a formation for the suturing (C) of the prosthesis during implantation and projects axially from the prosthesis itself for a certain distance.
Claim 6
Dependent Claim
45 words
A prosthesis according to Claim 4, characterised in that the prosthetic valve leaflets (14) have arcuate edges and in that the other sheet (10) has homologous end edges (120, 120′) located at a certain distance from the arcuate edges of the prosthetic valve leaflets (14).
Claim 7
Dependent Claim
68 words
A prosthesis according to Claim 5, characterised in that the sheets (10, 12) are connected together by at least one connecting line having a festoon course (16) with loops which follow the line of the arcuate edges of the valve leaflets (14) and in that the homologous end edges (120, 120′) of the other sheet (10) are located at a certain distance from the said festoon line (16).
Claim 8
Dependent Claim
41 words
A prosthesis according to Claim 5 or Claim 6, characterised in that the homologous end edges (120) of the other sheet (10) also have a generally festoon course which copies the course of the arcuate edges of the valve leaflets (14).
Claim 9
Dependent Claim
22 words
A prosthesis according to Claim 5 or Claim 6, characterised in that the homologous end edges (120′) have a generally straight course.
Claim 10
Dependent Claim
43 words
A prosthesis according to any one of claims 5 to 8, characterised in that the homologous end edges (120, 120′) are located at a distance of the order of at least about 1 cm from the arcuate edges of the valve leaflets (14).
Claim 11
Dependent Claim
27 words
A prosthesis according to Claim 8, characterised in that the homologous end edges (120′) are approximately complanar with the free end edges of the valve leaflets (14).
Claim 12
Dependent Claim
42 words
A valve prothesis according to Claim 4 or Claim 8, characterised in that the other sheet (10) projects substantially in an axial direction from the prosthesis whereby the prosthesis itself takes on the character of a vasco-valvular, preferably an aortic valve, prosthesis.
Claim 13
Dependent Claim
56 words
A prosthesis according to any one of Claims 4 to 10, characterised in that, at the end of the prosthesis intended to be located flowdynamically upstream of the direction of free flow of the blood through the prosthesis, the said one sheet (12) projects a certain distance beyond the corresponding edge of the other sheet (10).
Claim 14
Dependent Claim
35 words
A prosthesis according to any one of Claims 4 to 12, characterised in that at least one of the two sheets (10, 12) has a projecting appendage (124) for use in a re-constructional operation .
Claim 15
Dependent Claim
50 words
A prosthesis according to any one of Claims 4 to 12, characterised in that the said sheets (10, 12) have a generally trapezoidal shape whereby, when the sleeve is closed on itself to form the duct intended to be traversed by the blood flow, it assumes a generally frusto-conical shape.
Claim 16
Dependent Claim
18 words
A prosthesis according to Claim 3, characterised in that the synthetic material is continuous and/or micro-porous and/or composite.
Claim 17
Dependent Claim
17 words
A prosthesis according to Claim 3 or Claim 15, characterised in that the synthetic material is polyurethane.
Claim 18
Dependent Claim
24 words
A prosthesis according to Claim 4, characterised in that the two sheets (10, 12) are connected together (16) by stitching and/or welding and/or gluing.
Claim 19
Dependent Claim
20 words
A prosthesis according to any one of Claims 1 to 4 made in a single piece, for example by moulding.
Claim 20
Dependent Claim
13 words
19 An aortic valve prosthesis according to any one Claims 1 to 18.
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