EP1088529A2
Expired / Lapsed
EP
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A device for cardiac valve replacement or repair operations
Assignee: Sorin Biomedica Cardio SpA
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Filing: 2000-09-29
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Granted: —
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Expires: 2020-09-29
Abstract
Abstract The device, such as a ring for annuloplasty or a cardiac valve prosthesis comprises at least one support formation (12, 100, 102) of shape-memory material which can have a first, generally contracted shape, in which the formation (12, 100, 102) can be wound on itself or folded for the purpose of locating it in the implant position, for example with low-invasive surgical techniques, and a second, generally unfolded shape, to which the shape-memory material is brought after location of the support formation (12, 100, 102) in the implant position. Anchorage formations (16, 104) are also envisaged, which permit fixing of the device in the implant position.
Inventors
- 👤 Pietro Arru
- 👤 Franco Vallana
- 👤 Gioachino Bona
- 👤 Carla Stacchino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2442; A61F2/2445; A61F2/2448; A61F2/2412; A61F2210/00; A61F2210/0014; A61F2210/0023
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
94 words
A device (10, 10a, 88) for cardiac valve replacement or
repair operations, characterised in that it comprises at
least one support formation (12, 100, 102) of shape-memory
material which can adopt: a first, generally contracted shape, in which the
said formation (12, 100, 102) can be wound on itself or
folded for the purpose of location in the implant position,
for example with low-invasive surgical techniques, and a second, generally unfolded shape, to which the said
shape memory material is brought after positioning of the
support formation (12, 100, 102) in the implant position.
Claim 2
Dependent Claim
36 words
A device (10, 10a, 88) according to Claim 1,
characterised in that the said shape memory material is a
metal and the passage from the said first to the said second
shape is achieved by heating.
Claim 3
Dependent Claim
17 words
A device (10, 10a, 88) according to Claim 2,
characterised in that the said metal is nitinol.
Claim 4
Dependent Claim
44 words
A device (10, 10a, 88) according to Claim 2 or Claim 3,
characterised in that the said shape memory material passes
from the said first to the said second shape by the effect of
heating to a temperature of the order of about 50°C.
Claim 5
Independent Claim
28 words
A device (10, 10a, 88) according to any preceding claim,
characterised in that the said at least one support formation
(12, 100, 102) is of generally annular shape.
Claim 6
Dependent Claim
31 words
A device (10, 88) according to Claim 5, characterised in
that the said at least one support formation (12, 100, 102)
is formed in the shape of a continuous annular body.
Claim 7
Independent Claim
24 words
A device (10, 10a, 88) according to any preceding claim,
characterised in that it includes anchorage means for fixing
it in the implant position.
Claim 8
Dependent Claim
30 words
A device (10, 10a, 88) according to Claim 7,
characterised in that the said anchorage means comprise
formations capable of extending outwardly from the said
support formation (12, 100, 102).
Claim 9
Dependent Claim
30 words
A device (10, 10a, 88) according to Claim 8,
characterised in that the said formations are projections
(16, 104) of the said at least one support formation (12,
100, 102).
Claim 10
Dependent Claim
130 words
A device (10, 10a, 88) according to Claim 9,
characterised in that the said projections (16, 104) are made
of a shape-memory material different from that utilised for
the said support formation and which can adopt: a first shape, usable upon implant of the device,
in which the said projections (16, 104) are generally
contracted, and a second shape, usable when the device is in the
unfolded position, in which the said projections (16, 104)
extend outwardly from the device itself, the passage from the
said first to the said second shape occurring by the effect
of heating to a temperature greater than that at which the
passage from one shape to the other of the shape memory
material used for the said support formation (12, 100, 102)
takes place.
Claim 11
Independent Claim
18 words
A device (10, 10a) according to any preceding claim
characterised in that it is a ring for annuloplasty.
Claim 12
Independent Claim
73 words
A device (88) according to any of Claims from 1 to 10,
characterised in that it is a valve prosthesis comprising a
valve sleeve (90, 92) of generally flexible material having
respective inlet and outlet edges (99) with respect to the
direction of free flow of blood through the prosthesis, the
said support formation (100, 102) of shape-memory material
being associated with at least one of the said inlet and
outlet edges (99).
Claim 13
Dependent Claim
38 words
A device (88) according to Claim 12, characterised in
that there are provided first (100) and second (102) support
formations located respectively in correspondence with the
said inlet edge and the said outlet edge (99) of the
prosthesis.
Claim 14
Independent Claim
55 words
A device (88) according to any of Claims 12 or 13,
characterised in that the said at least one support formation
(100) is located in correspondence with the inlet edge of the
prosthesis and has a generally festoon configuration with
crests located in correspondence with the commissures of the
valve membranes (94) of the prosthesis.
Claim 15
Independent Claim
56 words
A device (88) according to any of Claims from 12 to 14,
characterised in that the said at least one support formation
(102) is located in correspondence with the outlet edge of
the prosthesis and has a generally festoon configuration with
crests located in correspondence with the commissures of the
valve membranes (94) of the prosthesis.
Claim 16
Dependent Claim
82 words
A device (88) according to Claim 15, characterised in
that the said valve sleeve comprises an outer layer (90) and
an inner layer (92) carrying the valve membranes (94) of the
prosthesis, the said outer layer (90) and the said inner
layer (92) being connected together by a line of stitching
(96) having a generally festoon configuration and in that a
respective support formation (102) is located in
correspondence with the said outlet edge (99) closely
adjacent the said stitch line (96).
Claim 17
Independent Claim
44 words
A device (88) according to any of Claims from 12 to 16,
characterised in that it comprises, in correspondence with
the said inlet edge, a seal strip of sheet material (106)
which can be fitted in contact with the wall of the implant
site.
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