FR2791071A1 - Knitted fabric for replacing portion of artery wall following endartherectomy is made from two layers of plain knitted textured yarns - Google Patents

Knitted fabric for replacing portion of artery wall following endartherectomy is made from two layers of plain knitted textured yarns Download PDF

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Publication number
FR2791071A1
FR2791071A1 FR9903404A FR9903404A FR2791071A1 FR 2791071 A1 FR2791071 A1 FR 2791071A1 FR 9903404 A FR9903404 A FR 9903404A FR 9903404 A FR9903404 A FR 9903404A FR 2791071 A1 FR2791071 A1 FR 2791071A1
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FR
France
Prior art keywords
layers
knitted fabric
knitted
threads
endartherectomy
Prior art date
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Granted
Application number
FR9903404A
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French (fr)
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FR2791071B1 (en
Inventor
Alfredo Meneghin
Michel Therin
Francois Regis Ory
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Sofradim Production SAS
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Sofradim Production SAS
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Filing date
Publication date
Application filed by Sofradim Production SAS filed Critical Sofradim Production SAS
Priority to FR9903404A priority Critical patent/FR2791071B1/en
Publication of FR2791071A1 publication Critical patent/FR2791071A1/en
Application granted granted Critical
Publication of FR2791071B1 publication Critical patent/FR2791071B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/04Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06Blood vessels
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B21/00Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes

Abstract

The fabric consists of two layers of plain knitted textured yarns of between 40 and 80 decitex, each having between 30 and 70 filaments of a biocompatible plastic material, produced on a knitting machine with two hook bars having an English gauge of 32 - 40 needles per inch. The two layers are in a 1:1 ratio and they are subjected to a thermo-fixing procedure as they come off the knitting machine. The fabric is coated with a sealing substance, preferably resorbable, such as a collagen.

Description

ii

L'invention concerne un tricot pour substitut de paroi artérielle.  The invention relates to a knitted fabric for arterial wall substitute.

Pour débarrasser une artère d'un athérome, il est procédé à une endarterectomie. Lors de celle-ci il est connu, après ouverture et traitement de l'artère, d'insérer dans l'intervalle délimité par les bords de l'ouverture un substitut de paroi artérielle qui garde en forme la zone ayant fait l'objet du traitement et évite donc que la liaison par suture directe des bords de  To rid an artery of an atheroma, an endarterectomy is performed. During this it is known, after opening and treatment of the artery, to insert in the interval delimited by the edges of the opening a substitute of arterial wall which keeps in shape the zone having been the object of treatment and therefore avoids that the direct suture connection of the edges of

l'ouverture entraîne une réduction de la section interne de l'artère.  the opening results in a reduction of the internal section of the artery.

Ce substitut de paroi artérielle est en général obtenu par  This arterial wall substitute is generally obtained by

découpage, à la forme de l'ouverture.  cutting, to the shape of the opening.

Ce tricot présente une élasticité proche de celle de la paroi et est préalablement enduit par une substance assurant l'étanchéité, le plus souvent résorbable, par exemple de collagène. Cette pièce est fixée au bord  This knit has an elasticity close to that of the wall and is previously coated with a sealing substance, most often absorbable, for example collagen. This piece is attached to the edge

de la fente par des points de suture réalisés près de ses bords.  from the slit by stitches made near its edges.

Cela impose que le tricot soit indémaillable dans tous les sens puisque les bords des pièces découpées dans une nappe tricotée de base varient en forme et position en fonction de la dimension et de la forme de  This requires that the knitted fabric can not be broken in all directions since the edges of the pieces cut from a basic knitted tablecloth vary in shape and position depending on the size and shape of

l'ouverture mais aussi de la dimension diamétrale de l'artère.  the opening but also the diametrical dimension of the artery.

Les tricots actuellement utilisés satisfont en général aux conditions d'extensibilité et de porosité mais sont en général plus épais que  The knits currently used generally satisfy the conditions of extensibility and porosity but are generally thicker than

la paroi artérielle pour offrir l'indémaillabilité recherchée.  the arterial wall to provide the desired resistance.

La présente invention a pour objet de fournir un tricot qui tout en étant aussi fin que la paroi artérielle satisfait aux autres conditions de porosité et d'indémaillabilité et permet donc de réaliser des points de suture  The object of the present invention is to provide a knitted fabric which, while being as thin as the arterial wall, satisfies the other conditions of porosity and non-scalability and therefore makes it possible to make stitches.

de faible largeur à proximité immédiate des bords de la pièce découpée.  of small width in the immediate vicinity of the edges of the cut piece.

Le tricot selon l'invention comprend deux nappes de fils en liage simple tricot croisé, lesdits fils texturés de titre compris entre 40 et 80 décitex comprenant chacun entre 30 et 70 filaments d'une matière plastique biocompatible, par exemple polyester, et les deux nappes étant susceptibles d'être obtenues avec un métier à tricoter avec deux barres à passettes et une jauge anglaise comprise entre 32 et 40 aiguilles, en  The knitting according to the invention comprises two plies of yarns in single woven cross-knit binding, said textured yarns of title between 40 and 80 decitex each comprising between 30 and 70 filaments of a biocompatible plastic material, for example polyester, and the two plies being capable of being obtained with a knitting loom with two guide bars and an English gauge of between 32 and 40 needles,

fournissant les fils des deux nappes dans un rapport 1/1.  providing the yarns of the two layers in a 1/1 ratio.

Ce tricot, qui n'est formé que par deux nappes ayant un liage simple symétrique et au rapport 1/1 avec une fine jauge, est beaucoup plus  This knit, which is formed only by two plies having a simple symmetrical binding and in the ratio 1/1 with a fine gauge, is much more

mince que ceux actuels tout en présentant une excellente indémaillabilité.  thinner than the current ones while having excellent non-runability.

Le choix du fil utilisé: la grosseur, le nombre de filaments, sa frisure ou texturation, lié au choix de la jauge, permet d'obtenir un remplissage de la maille et une couverture intéressante par rapport à sa faible épaisseur; ce qui facilite son imperméabilisation ultérieure par enduction.  The choice of the wire used: the size, the number of filaments, its crimping or texturing, linked to the choice of the gauge, makes it possible to obtain a filling of the mesh and an interesting cover compared to its small thickness; which facilitates its subsequent waterproofing by coating.

L'invention sera mieux comprise à l'aide de la description qui  The invention will be better understood using the description which

suit en référence au dessin schématique annexé. Les figures 1 et 2 sont des graphiques représentant l'allure des  follows with reference to the accompanying schematic drawing. Figures 1 and 2 are graphs showing the appearance of

mailles des deux nappes.meshes of the two layers.

Figures 3 et 4 sont des vues partielles en plan par-dessus montrant à échelle très agrandie les mailles respectivement de la première  Figures 3 and 4 are partial plan views from above showing on a very enlarged scale the meshes respectively of the first

nappe et des deux nappes superposées.  tablecloth and two superimposed tablecloths.

A titre d'exemple, le tricot est réalisé avec un fil en polyester texturé ayant un titre de 50 décitex et 36 filaments, sur un métier chaîne  For example, knitting is made with a textured polyester yarn having a count of 50 decitex and 36 filaments, on a warp loom

ayant une jauge de 36 (nombre d'aiguilles par pouce anglais).  having a gauge of 36 (number of needles per English inch).

Les graphiques de figures 1 et 2 représentent schématiquement la forme du liage de chacune des deux nappes 1 et 2 qu'ils mettent en évidence. Il s'agit d'un liage simple et symétrique entre les deux nappes. Le barème du liage est le suivant:  The graphs in FIGS. 1 and 2 schematically represent the shape of the binding of each of the two plies 1 and 2 which they highlight. It is a simple and symmetrical bond between the two layers. The tying scale is as follows:

BARRE 1 BARRE 2BAR 1 BAR 2

1 11 1

0 20 2

I 1I 1

2 02 0

Les figures 3 et 4 qui représentent les mailles obtenues respectivement d'une nappe et de deux nappes superposées montrent que chacune des mailles d'une nappe est liée à une maille de l'autre nappe, ce qui donne au tricot son caractère indémaillable. Le fil représenté en noir à la figure 3 montre la formation des mailles, ceux représentés à la figure 4  FIGS. 3 and 4 which represent the stitches obtained respectively from one ply and from two superimposed plies show that each of the stitches of a ply is linked to a stitch of the other ply, which gives the knitted fabric its flawless nature. The wire shown in black in Figure 3 shows the formation of the stitches, those shown in Figure 4

montrent la formation d'une nappe et sa liaison avec l'autre nappe.  show the formation of a sheet and its connection with the other sheet.

Les fils noirs de figure 4 pourraient par ailleurs correspondre à la réalisation, dans le tricot, de l'une des rayures longitudinales espacées qui sont ménagées pour permettre au chirurgien d'orienter la pièce découpée  The black wires of FIG. 4 could moreover correspond to the production, in knitting, of one of the spaced apart longitudinal stripes which are provided to allow the surgeon to orient the cut piece.

par rapport à l'axe de l'artère ou de la fente.  relative to the axis of the artery or cleft.

Ces diverses figures mettent en évidence que la combinaison des deux nappes permet d'obtenir un tricot indémaillable fin ayant, pour l'exemple ci-dessus, une épaisseur de 0,3 mm, léger, opaque et serré et dont les bords, quel que soit leur emplacement sur le tricot, ne sont pas effilochables et résistent à la suture. Ainsi le substitut de paroi artérielle obtenu par découpage de ce tricot peut être suturé très près de ses bords en améliorant ainsi l'étanchéité de la jonction bord à bord entre cette pièce et la fente réalisée  These various figures show that the combination of the two plies makes it possible to obtain a fine nonwoven knit having, for the example above, a thickness of 0.3 mm, light, opaque and tight and whose edges, whatever either their location on the knit, are not frayable and resistant to suturing. Thus the arterial wall substitute obtained by cutting this knitting can be sutured very close to its edges, thereby improving the tightness of the edge-to-edge junction between this piece and the slit produced.

dans l'artère.in the artery.

Claims (4)

REVENDICATIONS 1/ Tricot caractérisé en ce qu'il comprend deux nappes de fils en liage simple tricot croisé, lesdits fils textures de titre compris entre 40 et décitex comprenant chacun entre 30 et 70 filaments d'une matière plastique biocompatible, par exemple polyester, et les deux nappes étant susceptibles d'être obtenues avec un métier à tricoter avec deux barres à passettes et une jauge anglaise comprise entre 32 et 40 aiguilles, en  1 / Knitted fabric, characterized in that it comprises two plies of threads in single woven cross-knit binding, said texture textured threads between 40 and decitex each comprising between 30 and 70 filaments of a biocompatible plastic material, for example polyester, and the two tablecloths being capable of being obtained with a knitting loom with two guide bars and an English gauge of between 32 and 40 needles, fournissant les fils des deux nappes dans un rapport 1/1.  providing the yarns of the two layers in a 1/1 ratio. 2/ Tricot selon la revendication 1, caractérisé en ce que les fils sont des fils polyester texturés de 50 décitex à 36 filaments travaillés avec  2 / knit according to claim 1, characterized in that the threads are textured polyester threads of 50 decitex with 36 filaments worked with une jauge anglaise de 36 aiguilles au pouce.  an English gauge of 36 needles per inch. 3/ Tricot selon la revendication 1, caractérisée en ce que en  3 / knitting according to claim 1, characterized in that in sortie du métier, il est soumis à une opération de thermofixation.  leaving the profession, it is subjected to a heat-setting operation. 4/ Substitut de paroi artérielle, caractérisé en ce qu'il comprend  4 / Arterial wall substitute, characterized in that it comprises une pièce d'un tricot selon l'une quelconque des revendications 1 et 2.  a piece of a knit according to any one of claims 1 and 2.
FR9903404A 1999-03-16 1999-03-16 ARTERIAL WALL SUBSTITUTE KNIT Expired - Lifetime FR2791071B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9903404A FR2791071B1 (en) 1999-03-16 1999-03-16 ARTERIAL WALL SUBSTITUTE KNIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9903404A FR2791071B1 (en) 1999-03-16 1999-03-16 ARTERIAL WALL SUBSTITUTE KNIT

Publications (2)

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FR2791071A1 true FR2791071A1 (en) 2000-09-22
FR2791071B1 FR2791071B1 (en) 2001-04-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945052A (en) * 1972-05-01 1976-03-23 Meadox Medicals, Inc. Synthetic vascular graft and method for manufacturing the same
EP0306690A2 (en) * 1987-08-07 1989-03-15 Vyzkumny Ustav Pletarsky Unruffled or ruffled knitted vessel prosthesis
EP0582232A1 (en) * 1992-08-06 1994-02-09 SORIN BIOMEDICA CARDIO S.p.A. A process for the manufacture of textile prostheses, for example vascular prostheses, and prostheses obtainable by this process
US5456711A (en) * 1992-05-15 1995-10-10 Intervascular Inc. Warp knitted carotid patch having finished selvedged edges
US5732572A (en) * 1993-04-01 1998-03-31 Vascutek Limited Textile prostheses having particular knit configuration including two-needle overlap stitch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945052A (en) * 1972-05-01 1976-03-23 Meadox Medicals, Inc. Synthetic vascular graft and method for manufacturing the same
EP0306690A2 (en) * 1987-08-07 1989-03-15 Vyzkumny Ustav Pletarsky Unruffled or ruffled knitted vessel prosthesis
US5456711A (en) * 1992-05-15 1995-10-10 Intervascular Inc. Warp knitted carotid patch having finished selvedged edges
EP0582232A1 (en) * 1992-08-06 1994-02-09 SORIN BIOMEDICA CARDIO S.p.A. A process for the manufacture of textile prostheses, for example vascular prostheses, and prostheses obtainable by this process
US5732572A (en) * 1993-04-01 1998-03-31 Vascutek Limited Textile prostheses having particular knit configuration including two-needle overlap stitch

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