FR2606642A1 - Element to be implanted in a vein, and device carrying this element - Google Patents

Element to be implanted in a vein, and device carrying this element Download PDF

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Publication number
FR2606642A1
FR2606642A1 FR8616043A FR8616043A FR2606642A1 FR 2606642 A1 FR2606642 A1 FR 2606642A1 FR 8616043 A FR8616043 A FR 8616043A FR 8616043 A FR8616043 A FR 8616043A FR 2606642 A1 FR2606642 A1 FR 2606642A1
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France
Prior art keywords
branches
hand
members
longitudinal axis
element according
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Granted
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FR8616043A
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French (fr)
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FR2606642B1 (en
Inventor
Michel Camus
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GARDETE JACQUES
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GARDETE JACQUES
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/011—Instruments for their placement or removal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/0108—Both ends closed, i.e. legs gathered at both ends
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/01—Filters implantable into blood vessels
    • A61F2002/016—Filters implantable into blood vessels made from wire-like elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • A61F2002/3008—Properties of materials and coating materials radio-opaque, e.g. radio-opaque markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364—Rotation about the common longitudinal axis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30677—Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/005—Rosette-shaped, e.g. star-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0065—Three-dimensional shapes toroidal, e.g. ring-shaped, doughnut-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0067—Means for introducing or releasing pharmaceutical products into the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
    • A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers

Abstract

The invention relates to an element to be implanted at least temporarily in a vein, and in particular an element for filtering the blood flowing in a vein. It is characterised in that the opposite ends 6, 7 of at least some of the branches 2 of the element 1 are interposed between two members 8, 9 connected together by a means 10 allowing their relative positions, and in particular separation, to be altered, so that, by acting on these means 10: - on the one hand, bringing the said members substantially along the longitudinal axis 31 of the element 1 towards a position termed the active position of the element ensures that the branches 2 will be at least slightly curved, and - on the other hand, separation of the said members 8, 9 substantially along the same longitudinal axis towards a position termed the rest position ensures that the branches 2 will straighten at least partially, and in particular proportionately to the movement of the members 8, 9.

Description

L'invention se rapporte à un élément à implanter au moins provisoirement dans une veine et notamment à un élément de filtrage du sang circulant dans une veine et au dispositif porteur de cet é1e'n'#nt.  The invention relates to an element to be implanted at least temporarily in a vein and in particular to an element for filtering the blood circulating in a vein and to the device carrying this é1e'n '# nt.

Non limitativement l'invention intéresse les éléments filtrants du type de ceux qui sont utilisés pour effectuer le filtrage temporaire et localisé du sang circulant dans la veine cave d'un être humain, notamment dans le but de retenir des caillots susceptibles d'entrainer une embolie pulmonaire chez un patient. Not limited to the invention relates to filtering elements of the type of those which are used to effect temporary and localized filtering of the blood circulating in the vena cava of a human being, in particular for the purpose of retaining clots capable of causing an embolism. pulmonary in a patient.

L'invention se rapporte plus particulièrement à un élément filtrant du type de ceux qui, sous anesthésie locale du patient, peuvent être dans un premier temps implantés dans sa veine cave inférieure par voie intraveineuse, notamment par introduction dans la veine jugulaire interne ou la veine fémorale, puis dans un second temps, notamment après dissolution des caillots au moyen d'agent à cet effet, être retirés par la même voie. The invention relates more particularly to a filter element of the type of those which, under local anesthesia of the patient, can be initially implanted in his inferior vena cava by intravenous route, in particular by introduction into the internal jugular vein or the vein femoral, then in a second time, in particular after dissolution of the clots by means of an agent for this purpose, to be removed by the same route.

Pour obtenir le filtrage localisé et temporaire de la veine cave inférieure, il est connu FR-A-2.580.504 d'utiliser un élément filtrant composé d'une pluralité de branches reliées entre elles par l'une de leurs extrémités et qui jointives au repos peuvent, à la manière des branches d'une ombrelle, être déployées de manière réversible par un moyen à cet effet, notamment actionnable à distance. To obtain localized and temporary filtering of the inferior vena cava, it is known FR-A-2,580,504 to use a filter element composed of a plurality of branches connected together by one of their ends and which adjoin the rest can, like the branches of an umbrella, be deployed in a reversible manner by a means for this purpose, in particular actuable remotely.

Pour cela, l'élément filtrant en question est porté à l'extrémité distale d'un cathéter dont l'extrémité proximale reste en dehors du corps du patient et comprend des organes pour actionner le moyen de déploiement et/ou de repli des branches. For this, the filter element in question is carried to the distal end of a catheter whose proximal end remains outside the patient's body and comprises members for actuating the means for deploying and / or folding the branches.

Le dispositif à cathéter et élément filtrant donne de très bons résultats mais on lui reproche tout de même de ne pas offir de possibilité suffisamment large de réglage de la capacité de filtrage de l'élément filtrant. The catheter and filter element device gives very good results but it is all the same criticized for not offering a sufficiently wide possibility of adjusting the filtering capacity of the filter element.

En outre, pour pouvoir être introduit dans la veine et déplacée vers son point d'action, l'élément filtrant doit être placé dans un logement prévu à cet effet à l'extrémité distale du cathéter d'où on l'extrait uniquement avant de commander son expansion.  In addition, to be able to be introduced into the vein and moved to its point of action, the filter element must be placed in a housing provided for this purpose at the distal end of the catheter from which it is extracted only before order its expansion.

En effet, a défaut d'être placé dans un logement pendant sa migration vers la veine cave inférieure, par l'extrémité distale de ses branches, l'élément filtrant accroche la paroi de la veine qu'il parcourt, ce qui risque d'altérer non seulement les dites branches mais surtout les parois de la veine contre laquelle ces dernières se déplacent. Indeed, failing to be placed in a housing during its migration towards the inferior vena cava, by the distal end of its branches, the filtering element grips the wall of the vein which it traverses, which risks alter not only the said branches but especially the walls of the vein against which the latter move.

Un résultat. que l'invention vise à obtenir est un élément filtrant et un dispositif porteur de cet élément qui ne présentent pas les inconvénients précités. A result. that the invention aims to obtain is a filter element and a device carrying this element which do not have the aforementioned drawbacks.

A cet effet, l'invention a pour objet un élément filtrant et son dispositif porteur, lequel élément étant notamment caractérisé en ce que les extrémités opposées d'au moins certaines des branches de l'élément filtrant sont interposées entre deux organes reliés par un moyen permettant d'en modifier les positions relatives et notamment l'écartement de manière telle que, par action sur ce moyen, d'une part le rapprochement des dits organes sensiblement selon l'axe longitudinal de l'élément vers une position dite position active de l'élément assure que les branches subissent au moins une certaine courbure et, d'autre part, l'éloignement des dits organes sensiblement suivant le même axe longitudinal vers une position dite position de repos de l'élément assure que les branches se redressent au moins partiellement et ce proportionnellement au déplacement des organes. To this end, the subject of the invention is a filter element and its support device, which element being in particular characterized in that the opposite ends of at least some of the branches of the filter element are interposed between two members connected by means making it possible to modify the relative positions and in particular the spacing so that, by action on this means, on the one hand the approximation of said members substantially along the longitudinal axis of the element towards a position called active position of the element ensures that the branches undergo at least a certain curvature and, on the other hand, the remoteness of said members substantially along the same longitudinal axis towards a position called position of rest of the element ensures that the branches straighten out less partially and in proportion to the displacement of the organs.

L'invention sera bien comprise à l'aide de la description ci-après faite à titre d'exemple non limitatif en regard du dessin ci-annexé qui représente schématiquement
Figure 1 : l'élément filtrant de profil,
Figure 2 : une coupe selon II-II de la figure 1,
Figure 3 : l'élément filtrant vu de profil en position partiellement contracté dans une veine,
Figure 4 : une vue selon F de la figure 3,
Figure 5 : une vue selon F de la figure 3 après décalage angulaire des organes terminaux de l'élément filtrant,
Figure 6 : une vue latérale d'une forme préférée de réalisation de l'élément filtrant,
Figure 7 : une vue en coupe longitudinale de l'élément représenté en figure 6,
Figure 8 : à plus faible échelle, l'élément filtrant selon l'invention équipé de son dispositif porteur et de mise en place.The invention will be better understood with the aid of the description below given by way of nonlimiting example with regard to the attached drawing which schematically represents
Figure 1: the profile filter element,
Figure 2: a section along II-II of Figure 1,
Figure 3: the filter element seen in profile in a partially contracted position in a vein,
FIG. 4: a view along F of FIG. 3,
FIG. 5: a view along F of FIG. 3 after angular offset of the terminal members of the filter element,
Figure 6: a side view of a preferred embodiment of the filter element,
FIG. 7: a view in longitudinal section of the element shown in FIG. 6,
Figure 8: on a smaller scale, the filter element according to the invention equipped with its carrier and positioning device.

En se reportant au dessin, on voit un élément à implanter au moins temporairement dans une veine 11 et notamment à un élément filtrant 1 qui comprend une pluralité de branches flexibles 2 qui, au repos, s'étendent sensiblement parallèlement entre elles selon les génératrices d'un cylindre virtuel 3 dont l'axe 31 définit globalement l'axe longitudinal de l'élément. Referring to the drawing, we see an element to be implanted at least temporarily in a vein 11 and in particular to a filter element 1 which comprises a plurality of flexible branches 2 which, at rest, extend substantially parallel to each other according to the generatrices of 'a virtual cylinder 3 whose axis 31 generally defines the longitudinal axis of the element.

Avantageusement, les branches pourront présenter une légère flèche vers l'extérieur du cylindre. Advantageously, the branches may have a slight arrow towards the outside of the cylinder.

Tel que cela apparaît également sur les figures, l'élément filtrant 1 est porté par l'extrémité distale 51 d'un dispositif 5 de mise en place tel un cathéter 4. As also appears in the figures, the filter element 1 is carried by the distal end 51 of a device 5 for positioning such as a catheter 4.

Selon l'invention les extrémités opposées 6, 7 d'au moins certaines des branches 2 de l'élément filtrant 1 sont interposées entre deux organes 8, S reliés entre eux par un moyen 10 permettant d'en modifier les positions relatives et notamment l'écartement de manière telle que, par action sur ce moyen 10
- d'une part, le rapprochement des dits organes sensiblement selon l'axe 31 longitudinal de l'élément 1 vers une position dite position active de l'élément assure que les branches 2 suivront au moins une certaine courbure et donc induiront l'expansion transversale de l'élément et,
- d'autre part, l'éloignement des dits organes 8, 9 sensiblement suivant le même axe longitudinal vers une position dite de repos assure que les branches 2 se redresseront au moins partiellement et ce notamment proportionnellement au déplacement des organes 8, 9.According to the invention the opposite ends 6, 7 of at least some of the branches 2 of the filter element 1 are interposed between two members 8, S connected together by means 10 making it possible to modify their relative positions and in particular the '' spacing so that, by action on this means 10
- On the one hand, the approximation of said bodies substantially along the longitudinal axis 31 of the element 1 towards a position called active position of the element ensures that the branches 2 will follow at least a certain curvature and therefore induce expansion cross section of the element and,
- on the other hand, the distance of said members 8, 9 substantially along the same longitudinal axis towards a so-called rest position ensures that the legs 2 will straighten at least partially and this in particular in proportion to the movement of the members 8, 9.

Dans un mode préféré de réalisation, toutes les branches de l'élément filtrant sont interposées entre les deux organes 8, 9 précités. De manière avantageuse les branches se plient sensiblement en V lors d'un rapprochement des organes de l'élément filtrant. In a preferred embodiment, all the branches of the filter element are interposed between the two aforementioned members 8, 9. Advantageously, the branches bend substantially in a V when the members of the filter element are brought together.

De préférence, les extrémités des branches sont solidaires des organes terminaux 8, 9.  Preferably, the ends of the branches are integral with the end members 8, 9.

La légère flèche évoquée plus haut assure que le pliage se fera dans le sens convenable. The slight arrow mentioned above ensures that folding will be done in the proper direction.

De cette manière, l'élément se centre dans la veine dans laquelle il est déployé. In this way, the element is centered in the vein in which it is deployed.

Conformément à l'invention, les extrémités 6, 7 d'au moins certaines des branches 2 de l'élément filtrant sont interposées entre des organes 8, 9 reliés entre eux par un moyen 10 permettant de commander un décalage angulaire A d'un organe par rapport à l'autre autour de l'axe longitudinal 31 de l'élément, ce décalage angulaire étant alors sensiblement indentique pour toutes les branches interposées entre les dits organes 8, 9 qui constituent l'un 8 l'extrémité proximale 81 de l'élément filtrant tandis que l'autre 9 constitue l'extrémité distale 91 du même élément. According to the invention, the ends 6, 7 of at least some of the branches 2 of the filter element are interposed between members 8, 9 connected together by means 10 making it possible to control an angular offset A of a member relative to each other around the longitudinal axis 31 of the element, this angular offset then being substantially identical for all the branches interposed between said members 8, 9 which constitute one 8 the proximal end 81 of l filter element while the other 9 constitutes the distal end 91 of the same element.

Avantageusement, la longueur des branches de l'élément est adaptée au diamètre de la veine dans laquelle l'élément est destiné à être déployé et ce manière telle que les organes terminaux 8, 9 puissent venir en butée l'un contre l'autre en position active de l'élément sans pour autant que les branches courbées ne détériorent la paroi de la veine 11. Advantageously, the length of the branches of the element is adapted to the diameter of the vein in which the element is intended to be deployed and in this way such that the end members 8, 9 can come into abutment against one another in active position of the element without the curved branches damaging the wall of the vein 11.

Suivant l'invention, le moyen d'actionnement 10 comprend au moins deux parties constitutives 12, 13 qui, d'une part sont chacune associée à l'un des organes terminaux 8, 9 de 1 'élément filtrant 1 et d'autre part sont mobiles entre elles au moins en translation selon l'axe longitudinal 31 de l'elementl.  According to the invention, the actuating means 10 comprises at least two constituent parts 12, 13 which, on the one hand are each associated with one of the terminal members 8, 9 of the filter element 1 and on the other hand are movable with each other at least in translation along the longitudinal axis 31 of the elementl.

De préférence les dites parties constitutives sont également mobiles entre elles en rotation selon l'axe longitudinal de l'élément 1. Preferably, said component parts are also movable with one another in rotation along the longitudinal axis of element 1.

Selon l'invention, le moyen d'actionnement 10 est formé par le dispositif 5 de mise en place de l'élément qui à ce effet, comprend deux parties longilignes 12, 13 qui, d'une part sont coulissantes et libres en rotation, l'une 13 dans l'autre 12 et, d'autre part dont les extrémités distales 121, 131 sont chacune associée à l'un des organes terminaux 8, 9 de l'élément 1.  According to the invention, the actuating means 10 is formed by the device 5 for placing the element which for this purpose comprises two elongated parts 12, 13 which, on the one hand are sliding and free to rotate, one 13 in the other 12 and, on the other hand, the distal ends 121, 131 are each associated with one of the terminal members 8, 9 of the element 1.

De préférence, les deux parties longilignes 12, 13 sont tubulaires et de diamètre compatible entre elles. Bien entendu le diamètre extérieur de la partie extérieure 12 est compatible avec celui de la plus petite des veines dans lesquelles va être introduit le dispositif. Preferably, the two elongated parts 12, 13 are tubular and of diameter compatible with each other. Of course the outside diameter of the outside part 12 is compatible with that of the smallest of the veins into which the device will be introduced.

La partie tubulaire extérieure 12 du dispositif de mise en place 5 de l'élément 1 est par son extrémité distale 121 liée à l'extrémité proximale 81 de l'élément filtrant et, la partie intérieure 13 du même dispositif 5 traverse quant à elle sensiblement axialement l'extrémité proximale 81 de l'élément filtrant et se trouve liée à l'extrémité distale 91 dudit élément, c'est-à-dire à l'organe terminal 9. The outer tubular part 12 of the device 5 for placing the element 1 is by its distal end 121 linked to the proximal end 81 of the filter element and, the internal part 13 of the same device 5 passes through substantially axially the proximal end 81 of the filter element and is linked to the distal end 91 of said element, that is to say to the terminal member 9.

Le dispositif 5 de mise en place de l'élément filtrant est, à son extrémité proximale 52, équipé d'au moins un moyen 14 de déplacement en translation de ces deux parties coulissantes 12, 13, l'une par rapport à l'autre. The device 5 for installing the filter element is, at its proximal end 52, equipped with at least one means 14 for translational movement of these two sliding parts 12, 13, one relative to the other .

Le dispositif 5 de ## mise en place est également à son extrémité proximale 52 équipée d'au moins un moyen 15 de déplacement en rotation de ces deux parties 12, 13 l'une par rapport à l'autre. The device 5 of ## positioning is also at its proximal end 52 equipped with at least one means 15 for rotationally moving these two parts 12, 13 relative to one another.

De préférence, tant le moyen de déplacement en translation 11 que le moyen de déplacement en rotation 15 sont constitués par des organes 16, 17 qui permettent de commander manuellement les mouvements relatifs des parties constitutives 12, 13 du dispositif 5. Preferably, both the translational displacement means 11 and the rotational displacement means 15 are constituted by members 16, 17 which make it possible to manually control the relative movements of the constituent parts 12, 13 of the device 5.

Avantageusement le dispositif est également à son extrémité proximale 5 équipé d'au moins un moyen de blocage 18 de la position relative tant en translation qu'en orientation de ses parties constitutives 12, 13. Advantageously, the device is also at its proximal end 5 equipped with at least one locking means 18 for the relative position both in translation and in orientation of its constituent parts 12, 13.

De préférence, le dispositif comprend également à son extrémité proximale 52 au moins un moyen d'indexation 19 tant en translation qu'en orientation de ses parties constitutives 12, 13 l'une par rapport à l'autre. Preferably, the device also comprises at its proximal end 52 at least one indexing means 19 both in translation and in orientation of its constituent parts 12, 13 relative to one another.

Dans un mode préféré de réalisation, l'élément filtrant 1 est directement réalisé au niveau de l'extrémité distale 121 de la partie tubulaire dite extérieure 12 du dispositif de mise en place 5, notamment au moyen de découpes 20 qui délimitent les branches 2.  In a preferred embodiment, the filter element 1 is produced directly at the distal end 121 of the so-called external tubular part 12 of the positioning device 5, in particular by means of cutouts 20 which delimit the branches 2.

Dans ce cas, on ne distingue pas les extrémités distales 121, 131 des parties tubulaires 12, 13 de celles des extrémités proximales 81 et distales de l'élément 1. In this case, the distal ends 121, 131 of the tubular parts 12, 13 are not distinguished from those of the proximal 81 and distal ends of the element 1.

En effet, les organes terminaux 8, 9 de l'élément ne sont plus a ce moment discernables. Indeed, the terminal members 8, 9 of the element are no longer discernible at this time.

C'est pour cette raison que sur la figure 6, ces organes terminaux 8, 9 sont représentés en traits mixtes fins. It is for this reason that in FIG. 6, these end members 8, 9 are shown in thin dashed lines.

Selon l'invention, les découpes 20 sont orientées sensiblement parallèlement à l'axe longitudinal 31 de l'élément filtrant. Suivant l'invention, les découpes 20 sont réalisées en hélice. According to the invention, the cutouts 20 are oriented substantially parallel to the longitudinal axis 31 of the filter element. According to the invention, the cuts 20 are made in a helix.

De préférence l'extrémité distale de l'élément filtrant est en outre équipée d'un organe radio-opaque (non représenté). Preferably, the distal end of the filter element is further equipped with a radiopaque member (not shown).

De manière également préférentielle, la partie coulissante intérieure 13 du dispositif de mise en place est tubulaire et son extrémité distale 131 est de diamètre intérieur D au moins suffisant pour recevoir un élément filtrant largable de type connu (non représenté) ou en vue de l'injection de produit, le débit dans ce tube est alors contrôlé par un organe non représenté. Also preferably, the internal sliding part 13 of the positioning device is tubular and its distal end 131 has an internal diameter D at least sufficient to receive a releasable filter element of known type (not shown) or in view of the injection of product, the flow in this tube is then controlled by a member not shown.

Dans une variante de réalisation,I 'extrémité distale de l'élément dit filtrant est pourvue d'un réceptacle tubulaire dans lequel prend place un élément filtrant largable du type précité. In an alternative embodiment, the distal end of the so-called filter element is provided with a tubular receptacle in which takes place a releasable filter element of the aforementioned type.

L'expansion transversale de l'élément 1 situe à l'extrémité distale 51 du dispositif de mise en place 5 permet donc le centrage de cette extrémité dans la veine 11 à l'intérieur de laquelle il a été introduit et donc celui du filtre largable retenu à cette extrémité avant son largage. The transverse expansion of the element 1 located at the distal end 51 of the positioning device 5 therefore allows the centering of this end in the vein 11 inside which it has been introduced and therefore that of the releasable filter retained at this end before it was dropped.

Ainsi constitué, on comprend que pour déployer ou relier les branches de l'élément filtrant, il suffit de déplacer l'une par rapport à l'autre, notamment en translation, les parties constitutives 12, 13 du dispositif de mise en place 5 notamment en agissant sur les moyens prévus à cet effet. Thus constituted, it is understood that to deploy or connect the branches of the filter element, it suffices to move one relative to the other, in particular in translation, the constituent parts 12, 13 of the positioning device 5 in particular by acting on the means provided for this purpose.

Pour, de préférence en position déployée de l'élément filtrant 1, obtenir un décalage angulaire des organes 8, 9 autour de l'axe longitudinal 31 dudit élément et par cela décaler angulairement entre elles les parties courbes de chaque branche, il suffit d'imprimer aux parties constitutives 12, 13 du dispositif 5 de mise en place, des mouvements de rotation antagonistes. To, preferably in the deployed position of the filter element 1, obtain an angular offset of the members 8, 9 around the longitudinal axis 31 of said element and thereby angularly offset between them the curved parts of each branch, it suffices to print to the constituent parts 12, 13 of the device 5 for positioning, antagonistic rotational movements.

Pour ce décalage angulaire des parties courbes des branches de l'élément filtrant sensiblement dans un plan normal à l'axe longitudinal de l'élément, on obtient le réglage de la capacité de filtrage de l'élément filtrant. For this angular offset of the curved parts of the branches of the filter element substantially in a plane normal to the longitudinal axis of the element, the filtering capacity of the filter element is adjusted.

De préférence, les branches 2 présenteront une zone 21 de pliage et/ou de courbure délimitée par exemple par un amoindrissement local de section ou une section transversale présentant localement une moindre résistance à la flexion.  Preferably, the branches 2 will have a zone 21 of folding and / or curvature delimited for example by a local reduction in cross-section or a cross-section having locally less resistance to bending.

Claims (10)

REVENDICATIONS 1. Elément à implanter au moins provisoirement dans une veine et notamment élément de filtrage (1) du sang circulant dans une veine et dispositif de mise en place (5) de cet élément, lequel élément filtant (1) comprend une pluralité de branches flexibles (2) qui au repos s'étendent sensiblement parallèlement entre elles globalement selon les génératrices d'un cylindre virtuel (3) d'axe longitudinal (31), cet élément est porté à l'extrémité distale (51) du dispositif de mise en place et CARACTERISE en ce que les extrémités opposées (6, 7) d'au moins certaines de ses branches (2) sont interposées entre deux organes (8, 9) reliés entre eux par un moyen (10) permettant d'en modifier les positions relatives et notamment l'écartement de manière telle que, par action sur ce moyen (10) 1. Element to be implanted at least temporarily in a vein and in particular filtering element (1) of the blood circulating in a vein and device for placing (5) this element, which filtering element (1) comprises a plurality of flexible branches (2) which at rest extend substantially parallel to each other generally along the generatrices of a virtual cylinder (3) of longitudinal axis (31), this element is carried at the distal end (51) of the delivery device place and CHARACTERIZED in that the opposite ends (6, 7) of at least some of its branches (2) are interposed between two members (8, 9) connected together by means (10) making it possible to modify their relative positions and in particular the spacing so that, by action on this means (10) - d'une part, le rapprochement des dits organes sensiblement selon l'axe (31) longitudinal de l'élément (1) vers une position dite position active de l'élément assure que les branches (2) suivront au moins une certaine courbure et donc induiront l'expansion transversale de l'élément et, - On the one hand, the approximation of said bodies substantially along the longitudinal axis (31) of the element (1) towards a position called the active position of the element ensures that the branches (2) will follow at least a certain curvature and therefore induce the transverse expansion of the element and, - d'autre part, l'éloignement des dits organes (8, 9) sensiblement suivant le même axe longitudinal vers une position dite de repos assure que les branches (2) se redresseront au moins partiellement et ce notamment proportionnellement au déplacement des organes (8, 9). - on the other hand, the distance of said organs (8, 9) substantially along the same longitudinal axis towards a so-called rest position ensures that the branches (2) will straighten at least partially and this in particular in proportion to the displacement of the organs ( 8, 9). 2. Elément selon la revendication (1) CARACTERISE en ce que les extrémités (6, 7) d'au moins certaines de ses branches (2) sont interposées entre des organes (8, 9) reliés entre eux par un moyen (10) permettant de commander un décalage angulaire (A) d'un organe par rapport à l'autre autour de l'axe longitudinal (31)- de l'élément, ce décalage angulaire étant alors sensiblement indentique pour toutes les branches interposées entre les dits organes (8, 9) qui constituent l'un (8) l'extrémité proximale (81) de l'élément filtrant tandis que l'autre (9) constitue l'extrémité distale (91) du même élément.  2. Element according to claim (1) CHARACTERIZED in that the ends (6, 7) of at least some of its branches (2) are interposed between members (8, 9) interconnected by means (10) making it possible to control an angular offset (A) of one member relative to the other around the longitudinal axis (31) - of the element, this angular offset then being substantially identical for all the branches interposed between said members (8, 9) which constitute one (8) the proximal end (81) of the filter element while the other (9) constitutes the distal end (91) of the same element. 3. Elêment selon la revendication 1 ou 2 CARACTERISE en ce que le moyen d'actionnement (10) comprend au moins deux parties constitutives (12, 13) qui, d'une part sont chacune associée à l'un des organes terminaux (8, 9) de l'élément filtrant (1) et d'autre part sont mobiles entre elles selon l'axe longitudinal (31) de l'élément (i) ce, au moins en translation. 3. Element according to claim 1 or 2 CHARACTERIZED in that the actuating means (10) comprises at least two constituent parts (12, 13) which, on the one hand are each associated with one of the terminal members (8 , 9) of the filter element (1) and on the other hand are movable with each other along the longitudinal axis (31) of the element (i) this, at least in translation. 4. Elément selon l'une quelconque des revendications 1 à 3 4. Element according to any one of claims 1 to 3 CARACTERISE en ce que le moyen d'actionnement (10) est forme par le dispositif (5) de mise en place de l'élément.CHARACTERIZED in that the actuating means (10) is formed by the device (5) for positioning the element. 5. Element selon l'une quelconque des revendications 1 à 4 5. Element according to any one of claims 1 to 4 CARACTERISE en ce que le dispositif (5) de mise en place comprend deux parties longilignes (12, 13) qui, d'une part sont coulissantes et libres en rotation, l'une (13) dans l'autre (12) et, d'autre part dont les extrémités distales (121, 131) sont chacune associée à l'un des organes terminaux (8, 9) de l'élément (1).CHARACTERIZED in that the positioning device (5) comprises two elongated parts (12, 13) which, on the one hand are sliding and free to rotate, one (13) in the other (12) and, on the other hand, the distal ends (121, 131) are each associated with one of the terminal members (8, 9) of the element (1). 6. Elément selon la revendication 5 CARACTERISE en ce que les deux parties longilignes (12, 13) du dispositif (5) de mise en place sont tubulaires et de diamètre compatible entre elles. 6. Element according to claim 5 CHARACTERIZED in that the two elongated parts (12, 13) of the device (5) for positioning are tubular and of diameter compatible with each other. 7. Elément selon la revendication 4 ou 5 CARACTERISE en ce que l'extrémité proximale (52) du dispositif (5) de mise en place est équipée, d'une part d'au moins un moyen (14) de déplacement en translation de ces deux parties (12, 13) l'une par rapport à l'autre et, d'autre part d'au moins un moyen (15) de déplacement en rotation de ces deux parties (12, 13) l'une par rapport à l'autre. 7. Element according to claim 4 or 5 CHARACTERIZED in that the proximal end (52) of the device (5) for positioning is equipped, on the one hand with at least one means (14) for translational movement of these two parts (12, 13) relative to one another and, on the other hand at least one means (15) for rotationally moving these two parts (12, 13) relative to one another to the other. 8. Elément selon l'une quelconque des revendications 4 à 7 8. Element according to any one of claims 4 to 7 CARACTERISE en ce que le dispositif (5) de mise en place comprend également à son extrémité proximale (52) au moins un moyen d'indexation (19) tant en translation qu'en orientation de ses parties constitutives (12, 13) l'une par rapport à l'autre.CHARACTERIZED in that the positioning device (5) also comprises at its proximal end (52) at least one indexing means (19) both in translation and in orientation of its constituent parts (12, 13). one in relation to the other. 9. Element selon l'une quelconque des revendications 5 à 8 9. Element according to any one of claims 5 to 8 CARACTERISE en ce que l'élément (1) est directement réalisé au niveau de l'extrémité distale (121) de la partie tubulaire dite extérieure (12) du dispositif de mise en place (5), notamment au moyen de découpes (20) qui délimitent les branches (2). CHARACTERIZED in that the element (1) is produced directly at the distal end (121) of the so-called external tubular part (12) of the positioning device (5), in particular by means of cutouts (20) which delimit the branches (2). 10. Elément selon l'une quelconque des revendications 5 à 9 CARACTERISE en ce que la partie coulissante intérieure (13) du dispositif de mise en place est tubulaire et son extrémité distale (131) est de diametre intérieur (D) au moins suffisant pour recevoir un élément filtrant largable de type connu où en vue de l'injection de produit, le débit dans ce tube est alors contrôlé par un organe.  10. Element according to any one of claims 5 to 9 CHARACTERIZED in that the internal sliding part (13) of the positioning device is tubular and its distal end (131) is of internal diameter (D) at least sufficient for receiving a releasable filter element of known type where, for the injection of product, the flow in this tube is then controlled by a member.
FR8616043A 1986-11-14 1986-11-14 ELEMENT TO BE IMPLANTED IN A VEIN AND CARRIER DEVICE THEREOF Expired FR2606642B1 (en)

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