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FR2580504A1 - Filter for partial and at least temporary interruption of a vein and catheter carrying the filter - Google Patents

Filter for partial and at least temporary interruption of a vein and catheter carrying the filter Download PDF

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Publication number
FR2580504A1
FR2580504A1 FR8506459A FR8506459A FR2580504A1 FR 2580504 A1 FR2580504 A1 FR 2580504A1 FR 8506459 A FR8506459 A FR 8506459A FR 8506459 A FR8506459 A FR 8506459A FR 2580504 A1 FR2580504 A1 FR 2580504A1
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Prior art keywords
filter
catheter
branches
partial
end
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FR8506459A
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French (fr)
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FR2580504B1 (en )
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Pieronne Alain
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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
    • A61F2/01Filters implantable into blood vessels
    • 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
    • A61F2/01Filters implantable into blood vessels
    • A61F2002/011Instruments for their placement or removal
    • 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
    • A61F2/01Filters implantable into blood vessels
    • A61F2002/016Filters implantable into blood vessels made from wire-like elements
    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0006Rounded shapes, e.g. with rounded corners circular
    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028Shapes in the form of latin or greek characters
    • A61F2230/005Rosette-shaped, e.g. star-shaped
    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063Three-dimensional shapes
    • A61F2230/0067Three-dimensional shapes conical
    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063Three-dimensional shapes
    • A61F2230/0073Quadric-shaped
    • A61F2230/008Quadric-shaped paraboloidal
    • 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0096Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
    • A61F2250/0098Markers 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 a filter for partial and at least temporary interruption of a vein, and in particular of a lower vena cava of a human being. The filter comprises a plurality of branches 2 connected together at one of their ends, and which are contiguous at rest. It is characterised in that it comprises means such as a balloon 8 for spreading out the branches 2 of the filter 1 reversibly in the manner of the branches of an umbrella. The filter is mounted at the distal end 13 of a catheter whose proximal end is outside the body of the patient, the catheter allowing the inflation of the balloon, and possibly the infusion of therapeutic substances, to be controlled from a distance. Application to the medical equipment industry. <IMAGE>

Description

L'invention concerne un filtre pour l'interruption partielle et au moins provisoire d'une veine ainsi qu'un cathéter porteur du filtre. The invention relates to a filter for partial interruption and at least temporarily of a vein as well as a filter delivery catheter.

Notamment mais non exclusivement, l'invention se rapporte a l'interruption partielle et provisoire de la veine cave inférieure chez un être humain, dans le but d'empêcher une embolie pulmonaire ou une récidive. Particularly but not exclusively, the invention relates to the partial and temporary interruption of the inferior vena cava in a human in order to prevent a pulmonary embolism or recurrent.

On pratique actuellement de manière courante l'interruption partielle ou définitive de la veine cave inférieure au cours des phlébites pour retenir les caillots véhiculés par le sang et empêcher leur migration vers l'artère pulmonaire ou ils provoqueraient une embolie. We currently practice routinely partial or permanent interruption of the inferior vena cava during phlebitis to retain clots carried by the blood and prevent their migration to the pulmonary artery or they would cause an embolism.

Différentes techniques ont été développées jusqu a ce jour et par exemple l'une d'elles consiste a ligaturer la veine cave de manière ay interrompre définitivement la circulation du sang. Various techniques have been developed up to date and for example one of them is to be ligated how vena cava ay permanently interrupt the flow of blood.

Une autre solution voisine consiste a interrompre partiellement la circulation du sang dans la veine cave inférieure par ligature partielle notamment au moyen d'un clip connu sous le nom de clip "ADAMS WEESE" ou de "MILES". Another similar solution is partially interrupt the flow of blood in the inferior vena cava partial ligation in particular by means of a clip known as the clip name "ADAMS WEESE" or "miles".

Ces deux techniques donnent d'assez bons résultats mais elles présentent l'inconvénient majeur de nécessiter une anesthésie générale du patient, ce qui est parfois peu compatible avec son état de santé, surtout lorsqu'il vient de présenter une embolie pulmonaire. These two techniques give fairly good results but they have the major disadvantage of requiring a patient general anesthesia, which is sometimes incompatible with his health, especially when it comes to present a pulmonary embolism.

Pour remédier a cet inconvénient, ces dernières années des techniques ont été développées qui permettent d'implanter dans la veine cave inférieure un filtre sous anesthésie locale du patient, avec abord de la veine jugulaire interne ou de la veine fémorale. To remedy this problem, in recent years, techniques have been developed that enable implanted in the inferior vena cava of a patient under local anesthesia filter, with all of the internal jugular or femoral vein.

On peut citer, par exemple, des techniques qui mettent en oeuvre des filtres d'interruption partielle et définitive de la veine cave inférieure connus sous le nom de "ombrelle de MOBIN These include, for example, techniques that implement partial and final interruption filter the inferior vena cava known as the "umbrella MOBIN
UDDIN" et filtre de KIMRAY GREENFIELD. UDDIN "and filter KIMRAY GREENFIELD.

L'ombrelle de "MOBIN UDDIN" comprend six branches radiales qui sont reliées par une membrane perforée et elle peut être mise en place sous anesthésie locale en passant par la veine jugulaire interne (CLINICAL RADIOLOGY, 1982, vol 33, 577-583). The umbrella of "MOBIN UDDIN" includes six radial arms which are connected by a perforated membrane and it can be put in place under local anesthesia via the internal jugular vein (CLINICAL RADIOLOGY, 1982, vol 33, 577-583).

Des observations ont montré cependant chez le patient soigné selon cette technique une fréquence importante de thromboses précoces ou tardives de la veine cave inférieure. Observations have shown, however, in the patient treated using this technique a high frequency of early and late thrombosis of the inferior vena cava.

En outre, les pointes acérées des branches de l'ombrelle lui donnent un caractère traumatisant et sont responsables de perforations et d'hématomes rétro-péritonéaux et Interdisent l'emploi de fibrinolytiques. In addition, the sharp tips of the branches of the umbrella give it a traumatic nature and are responsible for perforations and retroperitoneal hematoma and Prohibit the use of fibrinolytic.

Le filtre de KIMRAY GREENFIELD (SURGERY, GYNECOLOGY, The filter KIMRAY GREENFIELD (SURGERY, Gynecology,
OBSTETRICS, vol 156, Feb 83, 217-219) est quant à lui constitue d'une pluralité de branches sinueuses réunies en leurs sommets. OBSTETRICS, vol 156, Feb 83, 217-219) is about constitutes it a plurality of serpentine legs joined by their vertices.

Le filtre est amené de préférence par la veine jugulaire dans la veine cave inférieure ou il est libéré ce qui entratne le déploiement de ses branches dont l'extrémité vient s'appuyer contre la paroi de la veine d'ou des risques relativement importants de migration pulmonaire. The filter is led preferably via the jugular vein into the inferior vena cava or it is released which entratne deployment of its branches, the end comes to rest against the wall of the relatively high risks or migration vein pulmonary.

Ce filtre donne de bons résultats mais présente l'inconvénient de ne pas prévenir suffisamment les récidives d'embolie pulmonaire principalement pour des patients présentant une megacave, c'est a dire une veine cave inférieure dont le diamètre est supérieur a vingt huit millimètres. This filter works well but has the disadvantage of not sufficiently prevent recurrence of pulmonary embolism mainly for patients with megacave, that is to say an inferior vena cava whose diameter exceeds twenty eight millimeters.

En outre, l'efficacité du filtre pour la capture des emboles courts est moins bonne si le filtre n'est pas centre a l'intérieur de la veine. In addition, the filter efficiency for capturing short emboli is worse if the filter is not center inside the vein.

Il existe également des techniques plus récentes qui opèrent par voie percutanée et qui mettent en oeuvre des filtres d'interruption partielle connus sous le nom de filtre Nid d'oiseau et de filtre SNITINOLS (RADIOLOGY, vol 150, 1984, 255-257 et RADIOLOGY, vol 145, Nov 1982, 351-355). There are also newer techniques that operate percutaneously and implement partial interruption of filters known as the Bird's Nest filter name and SNITINOLS filter (RADIOLOGY, vol 150, 1984, 255-257 and RADIOLOGY vol 145, November 1982, 351-355).

Ces deux dernières techniques mettent en oeuvre une fibre enchevêtrée sur elle-meme d'une manière anarchique, ou ordonnée en spirale, qui constitue ainsi un filtre. These last two techniques involve a fiber entangled on itself of uncontrolled manner, or ordered spiral, which thus constitutes a filter.

L'ensemble des techniques précédemment décrites présente d'une manière générale l'inconvénient de provoquer une interruption partielle ou totale de la veine cave inférieure qui est définitive c'est a dire qu'il n'est pas possible, sauf par une intervention chirurgicale, de retirer le filtre de la veine. The set of techniques described above has generally the disadvantage of causing a partial or total interruption of the inferior vena cava, which is final that is to say that it is not possible except by surgery , removing the filter from the vein.

En outre, s ils ne permettent #pas de mettre en oeuvre simultanément un traitement thérapeutique par infusion (perfusion continue) par exemple de substances fibrinolytiques dans la zone du filtre ou par voie générale. In addition, if they do #not possible to implement simultaneously a therapeutic treatment by infusion (continuous infusion) for example of fibrinolytic substances in the filter area or systemically.

Face a ces techniques, l'invention propose un filtre pour l'interruption partielle et provisoire de la veine cave inférieure c'est a dire un filtre qui est destine a séjourner un temps défini dans la veine et qui interrompt de manière partielle sa circulation de façon a retenir et a piéger les caillots. Faced with these techniques, the invention provides a filter for the partial and temporary interruption of the inferior vena cava that is to say a filter which is intended to stay for a time defined in the vein and interrupts partially its circulation so as to retain and trap clots.

Dans ce domaine, on connaît un ballon occlusif qui est au stade expérimental et qui permet une interruption provisoire de la veine cave, mais complète, c'est a dire une interruption totale de la circulation sanguine. In this area, known occlusive balloon which is experimental and allowing a temporary interruption of the vena cava, but complete, that is to say a total interruption of blood flow.

Un des buts de la présente invention est donc de proposer un filtre pour l'interruption partielle et provisoire d'une veine, notamment de la veine cave inférieure, qui puisse être mis en place puis retiré de la veine et qui donc, de ce fait, présente un caractère préventif, beaucoup plus marque que les filtres existants en regard notamment de l'embolie pulmonaire. One of the purposes of the present invention is therefore to provide a filter for the partial and temporary interruption of a vein, including the inferior vena cava, which can be set up and removed from the vein and thus, thereby presents a preventive nature, much more brand than existing filters look particularly pulmonary embolism.

Un autre but de la présente invention est de proposer un filtre qui permet, simultanément à son implantation, un traitement par infusion de substances thérapeutiques dans la zone du filtre ou par voie générale. Another object of the present invention is to provide a filter that allows, simultaneously with its implantation, an infusion treatment by therapeutic substances in the filter area or systemically.

Un autre but de la présente invention est de proposer un filtre qui se centre de lui-même en position à l'intérieur de la veine et qui s'adapte non seulement à son diamètre nominale mais également à ses variations temporaires de diamètre. Another object of the present invention is to provide a filter that center itself in position within the vein and adapts not only to its nominal diameter, but also to its temporary variations in diameter.

Un autre but de la présente invention est de proposer un filtre qui n'a pas de caractères traumatisants pour la paroi de la veine. Another object of the present invention is to provide a filter which has no traumatic characters for the wall of the vein.

Un autre but de la présente invention est de proposer un cathéter porteur du filtre qui lui permet d'assurer ces différentes fonctions. Another object of the present invention is to provide a delivery catheter of the filter which enables it to ensure these different functions.

D'autres buts et avantages de la présente invention apparaîtront au cours de la description qui va suivre. Other objects and advantages of the present invention appear from the following description.

Selon l'invention, le filtre pour l'interruption partielle et au moins temporaire d'une veine et notamment de la veine cave inférieure d'un être humain, comprend une pluralité de branches According to the invention, the filter for the partial and at least temporary interruption of a vein and including the inferior vena cava of a human being, includes a plurality of legs
flexibles liées les unes aux autres à leur extrémité proximale, et s'étendant au repos approximativement parallèlement les unes flexible bonded to each other at their proximal end, and extending approximately parallel to each rest
aux autres, selon les génératrices d'un cylindre, jusqu'a leur extrémité distale. to the other, along the generatrices of a cylinder, until their distal end.

Il est caractérisé par le fait qu'il comprend des moyens déformables d'expansion réversibles des branches, commandables a distance, qui sont situes a l'intérieur du cylindre défini par It is characterized in that it comprises deformable expansion means reversible branch, controllable distance, which are located within the cylinder defined by
les branches au repos et qui, par déformation, exercent sur les branches break and by deformation exerted on
branches une poussée par l'intérieur qui les déploient a la manière des branches d'une ombrelle, d'une amplitude suffisante branches a push from the inside that deploy in the manner of the branches of an umbrella, of sufficient magnitude
pour que chaque branche soit appliquée par déformation dans sa zone distale contre la paroi de la veine. so that each branch is applied by deformation in its distal area against the wall of the vein.

Le cathéter porteur du filtre présente une longueur The filter delivery catheter has a length
suffisante pour que son extrémité distale que prolonge le filtre, soit situe au niveau de la veine a obturer partiellement, notamment de la veine cave inférieure, et que son extrémité proximale soit en dehors du corps du patient. sufficient so that its distal end that extends the filter or at the level of the vein partially seal, including the inferior vena cava, and its proximal end is outside the patient's body.

Le cathéter comprend un conduit longiligne susceptible de coulisser longitudinalement a l'intérieur d'une gaine extérieur d'introduction, dans l'extrémité distale de laquelle les #branches du filtre sont susceptibles d'être logées a l'état replié. The catheter comprises an elongate duct may slide longitudinally on the inside of outer sheath introducer in the distal end of which #branches of the filter are likely to be accommodated in the folded state.

Il est caractérisé en ce qu'il comprend des moyens réversibles pour commander depuis son extrémité proximale le déploiement des branches et pour régler l'amplitude du dit déploiement. It is characterized in that it comprises reversible means for controlling from the proximal end of the deployment of the branches and for adjusting the amplitude of said deployment.

L'invention sera mieux comprise a l'aide de la description qui va suivre, a titre d'exemple non limitatif, en regard du dessin ci-annexé, qui représente schématiquement The invention will be better understood using the following description, way of non-limiting example, in light of the accompanying drawing, which shows schematically
- figure 1 : une vue partielle de côte d'un filtre raccorde a l'extrémité distale d'un cathéter, - Figure 1 is a partial side view of a filter connected to the distal end of a catheter,
- figure 2 : une vue de face du filtre de la figure 1, - Figure 2 shows a filter of the front view of Figure 1,
- figure 3 : une vue de côté de l'extrémité proximale du cathéter, - Figure 3 is a side view of the proximal end of the catheter,
- figures 4, 5 et 6 : une illustration des différentes phases de la mise en place du filtre a l'intérieur d'une veine. - Figures 4, 5 and 6: an illustration of the various stages of implementation of the filter within a vein.

Dans la description, les qualificatifs "proximal" et "distal" seront employés en prenant pour référence la zone du corps du patient par ou le filtre est introduit. In the description, the adjectives "proximal" and "distal" will be used taking as reference the patient's body area or filter is introduced. Ainsi l'extrémité distale sera l'extrémité la plus éloignée de cette zone et l'extrémité proximale la plus rapprochée. Thus the distal end will be the end furthest from the area and the closest proximal end.

En se reportant a la figure 1 et 2, le filtre 1 comprend une pluralité de branches flexibles 2 qui sont liées entre elles au niveau de leur extrémité proximale 3, et qui au repos s'étendent approximativement parallèlement entre elles selon les génératrices d'un cylindre de révolution d'axe 5. Referring to Figure 1 and 2, the filter 1 comprises a plurality of flexible arms 2 which are connected together at their proximal end 3 and which break extend approximately parallel to each other along the generatrices of a cylinder of revolution of axis 5.

Par exemple, les branches 2 sont assemblées au niveau de leur extrémité proximale 3, a la périphérie de l'extrémité d'un conduit 15, dont le rôle sera décrit ultérieurement. For example, the two branches are joined at their proximal end 3, at the periphery of the end of a duct 15, whose role will be described later.

A ce niveau, elles sont par exemple engagées dans les encoches radiales d'une bague, qui enserre -le conduit 6 au niveau de son extrémité, et fixées dans ces encoches par un clip, ou par un autre moyen. At this level, they are, for example engaged in radial slots of a ring, which surrounds -the conduit 6 at its end, and fixed in these recesses by a clip, or by other means.

Avantageusement, a ce niveau le filtre comprend une bague de marquage 7, qui est radio-opaque, et qui permet de déterminer la position du filtre dans le corps humain avec les moyens d'investigation habituels. Advantageously, at this level the filter includes a marking ring 7, which is radiopaque, and that determines the filter position in the human body with the usual means investigation.

Eventuellement, c'est cette bague de marquage qui assure l'assemblage des branches 2 sur le conduit 6. Optionally, it is this marking ring which assembles branches 2 of the duct 6.

Naturellement, toute autre disposition appropriée convient. Naturally, any other appropriate appropriate.

Le filtre comprend également des moyens déformables d'expansion des branches , qui sont commandables a distance. The filter also comprises deformable means expansion of the branches, which are controllable remotely.

Ces moyens sont situés a l'intérieur du cylindre défini par les branches 2 au repos et exercent par déformation une poussée sur les branches depuis l'intérieur ce qui les déploient a la manière des branches d'une ombrelle. These means are located within the cylinder defined by the branches 2 at rest and exert deformation by a pushing on the arms from the inside which deploy in the manner of the branches of an umbrella.

Dans les figures 1 et 2, ces moyens sont schématisés sous la forme d'un ballonnet expansible 8, gonflable a distance, qui est situé a l'intérieur du cylindre défini par les branches 2 entre leur extrémité proximale 3 et leur extrémité distale 4, de préférence, dans le voisinage proche de l'extréinité proximale 3. In Figures 1 and 2 these means are shown schematically in the form of an expandable balloon 8, inflatable distance, which is located within the cylinder defined by the two branches between their proximal end 3 and distal end 4, preferably in the immediate vicinity of the proximal extréinité 3.

Par exemple, tel que cela est visible dans la figure 1, le ballonnet 8 est monté sur l'extrémité 6 du conduit 15 en aval de la zone d'assemblage des branches 2. For example, as is visible in Figure 1, the balloon 8 is mounted on the end 6 of conduit 15 downstream of the joining region of the two branches.

De préférence, l'extrémité 6 du conduit 15 traverse de part en part de manière étanche le ballonnet 8 longitudinalement, de façon que, par gonflage, celui-ci s'expanse principalement de manière radiale. Preferably, the end 6 of conduit 15 traverses from side to side sealing the balloon 8 longitudinally such that by inflating, the latter expands primarily radially.

Le gonflage du ballonnet 8 provoque la déformation des branches 2 qu'autorise leur grande flexibilité, et de plus l'amplitude de déploiement des branches 2 varie en fonction du gonflage du ballonnet. inflating the balloon 8 causes deformation of the arms 2 allowed by their high flexibility, and further deployment amplitude branches 2 vary depending on the balloon inflation.

Cette amplitude sera décrite ultérieurement, mais dès a présent, il est possible de préciser qu'elle est suffisante pour qu'au moins la zone distale 10 des branches 2, c'est a dire la zone de leur extrémité distale, vienne s'appliquer contre la paroi de la veine, et se déformer au contact de celle-ci, de façon a épouser sa forme. This amplitude will be described later, but now it is possible to specify that it is sufficient that at least the distal region 10 of the arms 2, that is to say the region of their distal end, comes to lie against the wall of the vein, and deform in contact with the latter, so as to match its shape.

Il faut souligner que le dégonflage du ballonnet 8 entraine le repliement des branches 2 qui reviennent dans une position ou elles sont sensiblement parallèles entre elles, autour de l'axe 5. It is emphasized that the deflation of the balloon 8 causes the folding of branches 2 coming back in a position where they are substantially parallel to each other, about the axis 5.

Le ballonnet, quant a lui, se rétracte entre l'extrémité 6 du conduit 15 et la paroi interne des branches 2. The balloon, in turn, retracts between the end 6 of conduit 15 and the inner wall of the arms 2.

Tout nombre approprié de branches convient, mais de préférence, elles sont au nombre de huit, et elles sont réparties a quarante cinq degrés l'une de l'autre autour de l'axe 5. Any appropriate number of branches should, preferably, they are eight in number and are distributed forty five degrees from each other around the axis 5.

Dans la zone proximale 11, c'est a dire en arrière de la zone distale 10 dont il a été question précédemment, les branches sont reliées entre elles par au moins un filament souple 12, de façon a constituer, dans la partie proximale du filtre, un maillage apte a piéger des caillots éventuels. In the proximal region 11, that is to say behind the distal region 10 which has been discussed above, the legs are interconnected by at least one flexible filament 12, so as to constitute, in the proximal part of the filter a suitable mesh to trap any clots.

Le filament 12 est lie aux branches 2 dans leur zone proximale 11 par tout moyen approprie, et dans un mode préférentiel de la réalisation, la zone proximale 11 des branches 2 est percée d'orifices dans lesquels le filament 12 est enfilé en passant successivement d'une branche a l'autre. The filament 12 is bound to two branches in their proximal region 11 by any suitable means, and in a preferred mode of the embodiment, the proximal region 11 of the arms 2 is pierced with orifices in which the filament 12 is threaded by passing successively of one branch to another.

En outre, de préférence, le filament 12 est unique, et il est enfilé successivement dans les orifices des branches 2 en décrivant une spirale qui se referme vers le ballonnet 8. In addition, preferably, the filament 12 is unique, and it is fitted successively into the holes of the branches 2 in describing a spiral which closes to the balloon 8.

Le filament 12 peut coulisser a l'intérieur des orifices des branches 2, ce qui facilite la mise en place du filtre a l'intérieur d'une veine,- et son adaptation non seulement au diamètre nominal de la veine, mais également a ses distensions. The filament 12 may slide within apertures of the arms 2, which facilitates the establishment of the filter within a vein - and its adaptation not only to the nominal diameter of the vein, but also its distension.

Le filtre 1 est porte par un catheter, dont l'extrémité distale 13 est visible en figure 1 et l'extrémité proximale 14 est représentée d'une manière schématique en figure 3. The filter 1 is carried by a catheter, whose distal end 13 is visible in Figure 1 and the proximal end 14 is shown diagrammatically in Figure 3.

Le cathéter porteur du filtre 1 comprend principalement un conduit longitudinal souple 15 sur lequel sont assemblées les extrémités proximales 3 des branches 2 dans la zone 6 et le ballonnet 8 au niveau de son extrémité. The filter delivery catheter 1 mainly comprises a flexible longitudinal duct 15 on which are connected the proximal extremities 2 3 branches in the zone 6 and the balloon 8 at its end.

Le conduit 15 présente une longueur suffisante pour que son extrémité distale se situe au niveau de la veine ou le filtre 1 doit être implanté, par exemple la veine cave inférieure, et que son extrémité proximale se situe en dehors du corps du patient, ceci pouvant se faire en empruntant par exemple la veine jugulaire ou la veine fémorale. The conduit 15 has a sufficient length that its distal end is at the level of the vein or the filter 1 is to be implanted, for example the inferior vena cava, and its proximal end is outside the patient's body, this may be via eg the jugular or femoral vein.

Le conduit 15 peut coulisser sur une grande partie de sa longueur a l'intérieur d'une gaine 16, dont l'extrémité distale 17 présente des dimensions intérieures suffisantes pour que le filtre 1 vienne s'y loger a l'état replié notamment lors de l'introduction du filtre dans la veine. The conduit 15 can slide over a large part of its length inside a sheath 16, the distal end 17 has internal dimensions sufficient for the filter 1 to the reception therein such collapsed state during the introduction of the filter into the vein.

De préférence, la gaine 16 est fendue longitudinalement ou éventuellement préfendue. Preferably, the sheath 16 is split longitudinally or optionally pre-slit.

De cette façon, après introduction et mise en place du filtre dans la veine, il est possible d'enlever entièrement la gaine 16 en la faisant coulisser le long du conduit 15 a l'intérieur du corps du patient et en l'ouvrant le long de sa fente a l'extérieur. In this way, after introduction and installation of the filter in the vein, it is possible to fully remove the sheath 16 by sliding it along the duct 15 inside the patient's body and opening along of its slot to the outside.

Ceci est illustré schématiquement en figure 3. This is illustrated schematically in Figure 3.

L'extrémité proximale 18 du conduit 15 situe en dehors du- corps du patient, présente en outre un verrou d'étanchéité 19 que traverse les différentes canalisations qui empruntent ce conduit a destination de la zone du filtre. The proximal end 18 of the conduit 15 is outside du patient's body further has a sealing bolt 19 that passes through the various pipes which pass through this duct destined to the filter area.

Le conduit 15 présente des moyens pour commander de manière réversible depuis l'extrémité proximale du cathéter l'expansion des branches 2 du filtre 1, c'est a dire le gonflement du ballonnet 8 dans le cas du filtre représenté dans les figures. The conduit 15 has means for controlling a reversible manner from the proximal end of the catheter to expand the arms 2 of the filter 1, that is to say the inflation of the balloon 8 in the case of the filter shown in Figs.

Ces moyenstconsistent, dans ce cas, en une canalisation 20 qui parcourt le conduit 15, débouche a#l'intérleur du ballonnet 8 par exemple au travers d'un orifice schématisé en 21, et dont l'extrémité proximale présente des moyens schématisés en 22 pour injecter dans le ballonnet 8 un fluide provoquant son gonflement ou pour aspirer ce fluide. These moyenstconsistent, in this case, by a pipe 20 which traverses the duct 15 opens a # intérleur the balloon 8, for example through an orifice shown schematically at 21, and the proximal end has means shown diagrammatically at 22 to be injected into the balloon 8 fluid causing it to swell or to suck the fluid.

Il peut s'agir par exemple d'une pompe a piston qui injecte un liquide dans le ballonnet ou qui l'aspire selon le mouvement du piston. This may be for example a piston pump which injects a liquid into the balloon or sucks according to the movement of the piston.

Le conduit 6 présente par ailleurs avantageusement au moins une canalisation 23, qui permet depuis l'extrémité proximale du cathéter d'injecter directement dans la veine au niveau du filtre 1, des substances thérapeutiques. The conduit 6 has furthermore advantageously at least one conduit 23, which allows for the proximal end of the catheter to inject directly into the vein at the filter 1, therapeutic substances.

Le conduit 23 débouche de préférence, au niveau de l'extrémité distale du conduit par deux orifices 24, 25 situés l'un a l'intérieur du maillage du filtre 1, et l'autre de dimensions inférieures a l'extérieur du maillage en arrière du filtre. The duct 23 preferably opens at the distal end of the pipe via two orifices 24, 25 located one on the inside of the filter mesh 1, and the other smaller than the outside of the mesh back of the filter.

Ainsi, l'orifice 24 se situe sur l'axe 5 dans la partie extrême de l'extrémité 9 du conduit 15 au del de sa traversée du ballonnet de part en part. Thus, the orifice 24 lies on the axis 5 in the end portion of the end 9 of the conduit 15 to del it passes through the balloon through.

L'orifice 25 se situé de l'autre côté par rapport aux extrémités proximales 3 des branches 2 et débouche par exemple à la périphérie du conduit 15 en un point, ou éventuellement plusieurs répartis sur cette périphérie. The orifice 25 is located on the other side with respect to the proximal ends 3 of the legs 2 and opens for example at the periphery of the conduit 15 at a point, or possibly several spread over the periphery.

Du côte de l'extrémité proximale de la canalisation 23 se situe des moyens tels que par exemple un robinet trois voies schématisé en 26, qui permet notamment l'infusion dans la veine de manière momentanée ou continue de substances fibrinolytiques, et le rinçage au moyen de sérum héparine. The side of the proximal end of the channel 23 is such means as for example a three-way valve shown schematically at 26, which in particular infusion into the vein momentarily or continuously fibrinolytic substances, and rinsing using heparin serum.

La canalisation 23 permet donc avantageusement de combiner une obturation partielle et temporaire de la veine avec l'infusion dans la zone du filtre de substances thérapeutiques, et par exemple fibrinolytiques, ce qui n'est pas possible avec les filtres actuellement existants. The line 23 therefore advantageously allows to combine a partial and temporary blockage of the vein with the infusion in the filter area of ​​therapeutic substances, and for example fibrinolytic, which is not possible with currently existing filters.

Dans le but de faciliter l'introduction du cathéter et du filtre dans les veines, d'une manière connue, le cathéter présente un guide souple 27 le long duquel le cathéter est susceptible de coulisser et dont l'extrémité distale 28 est recourbée. In order to facilitate introduction of the catheter and the filter in the veins, in a known manner, the catheter has a flexible guide 27 along which the catheter is slidable and whose distal end 28 is bent.

Le guide 27 parcourt le conduit 15 et débouche a l'intérieur du cylindre défini par les branches 2 repliées par exemple au niveau de l'orifice 24. The guide 27 traverses the conduit 15 and opens out inside the cylinder defined by the legs 2 folded for example at the port 24.

Les figures 4 a 6 schématisent les différentes phases d'implantation du filtre dans la veine cave inférieure 29 d'un patient, ou on a schématisé en 30 le sens d'écoulement du flux sanguin. Figures 4 to 6 schematically show the different filter stages in implantation of the inferior vena cava 29 of a patient, or is diagrammatically at 30 the flow direction of the blood flow.

Dans une première phase, de façon connue, le guide 27 a été introduit par voie percutanée en empruntant la veine jugulaire ou la veine fémorale, jusqu'a ce que son extrémité 28 se trouve sensiblement en position dans la veine cave Inférieure du patient. In a first phase, in known manner, the guide 27 has been percutaneously introduced via the jugular vein or femoral vein, until its end 28 is substantially positioned in the inferior vena cava of the patient.

Ensuite, par une action depuis l'extérieur du corps du patient le cathéter a coulissé le long du guide 27 jusqu'a ce que son extrémité distale 17 vienne en position dans la veine cave inférieure. Then, by an action from outside the patient's body the catheter is slid along the guide 27 until its distal end 17 comes into position in the inferior vena cava.

Jusqu'a cette mise en position, le filtre 1 se trouve en état replié a l'intérieur de l'extrémité distale 17 de la gaine 16 qui entoure également la zone 6 du conduit 15. Up to this positioning, the filter 1 is in a folded state within the distal end 17 of the sheath 16 which also surrounds the region 6 of the duct 15.

Dans la phase suivante schématisée en figure 5, par une action depuis l'extérieur, la gaine 16 a coulisse relatiyement au conduit 15 de manière a faire sortir le filtre 1 de son extrémité distale 17. In the next stage shown schematically in Figure 5, by action from outside, the sheath 16 has slide relatiyement to the conduit 15 so as to remove the filter 1 from its distal end 17.

Il faut souligner que le filtre demeure a l'état replie et que les branches sont refermées sur l'axe 5. Note that the filter remains in the state withdraws and the branches are closed on the axis 5.

A ce stade, éventuellement, la gaine 16 est enlevée en la faisant coulisser le long du conduit 15 a l'intérieur du corps du patient et en l'ouvrant le long de sa fente a l'extérieur. At this point, optionally, the sheath 16 is removed by sliding it along the duct 15 inside the patient's body and opening along the slot on the outside.

De même, le guide 27 est éventuellement enlevé. Similarly, the guide 27 is eventually removed.

Dans la phase suivante depuis l'extérieur, une substance est Injectée dans le ballonnet 8 de façon à provoquer son gonflement et le déploiement des branches 2 du filtre 1. In the next stage from the outside, a substance is injected into the balloon 8 so as to cause it to swell and deployment of the arms 2 of the filter 1.

Tel que cela est visible en figure 6, l'amplitude du déploiement des branches 2 du filtre 1 est suffisante pour qu'au moins leur zone distale 10, c'est à dire approximativement le tiers de leur longueur, soit appliquée contre la paroi interne de la veine 29 et se déforme au contact de cette paroi. As is visible in Figure 6, the amplitude of the deployment of the arms 2 of the filter 1 is sufficient so that at least their distal region 10, i.e. approximately one third of their length, is applied against the inner wall of the duct 29 and is deformed in contact with this wall.

C'est cette zone des branches en appui contre la paroi de la veine 29 qui assure non seulement le maintien du filtre mais aussi son centrage. It is this area of ​​the support legs against the wall of the duct 29 which not only ensures the maintenance of the filter but also its centering.

Il faut souligner que la flexibilité des branches, et la possibilité de régler le gonflage du ballonnet 8 permettent d'adapter le filtre 1 a différents diamètres de veine, en particulier de l'adapter aux megacaves, dont le diamètre dépasse vingt huit millimètres, cela lui permet également de suivre les distensions de la veine au cours du temps tout en restant centré dans la veine. Note that the flexibility of the branches, and the ability to adjust the balloon inflation 8 to adapt the filter 1 has different diameters vein, particularly to adapt to megacaves whose diameter exceeds twenty eight millimeters, this also allows it to follow the distension of the vein over time while remaining centered in the vein.

Tel que cela a été précédemment décrit, lorsque le filtre est en position, il est possible d'injecter dans le sang des substances fibrinolytiques ainsi qu'un sérum héparine. As has been described above, when the filter is in position, it is possible to inject into the blood fibrinolytic substances and a heparin serum.

Dans le cas ou le filtre est implante de manière temporaire, passe le délai d'intervention, les opérations d'enlèvement du filtre s'effectuent dans l'ordre inverse, savoir le dégonflement du ballonnet pour replier les branches sur elles-même puis l'enlèvement du cathéter entier hors de la veine du patient. In case the filter is implanted temporarily, passes the response time, the filter removal operations are performed in reverse order, ie deflation of the balloon to collapse branches on them even then the removal of the entire catheter from the patient's vein.

On a obtenu de bons résultats en utilisant un filtre 1 constitué de huit bras flexibles de 0,30 millimètres de diamètre, en matériau hémocompatible, par exemple connu sous le nom de "HEPARIN-LIKE", d'une longueur de 6 centimètres environ, dont 1,5 centimètre est utilisé pour l'assemblage des bras sur l'extrémité distale du cathéter. Have been obtained good results using a filter 1 consists of eight flexible arms 0.30 mm in diameter, blood compatible material, for example known under the name of "HEPARIN-LIKE", with a length of 6 centimeters, including 1.5 centimeter is used for the arm assembly on the distal end of the catheter.

Les bras 2 sont écartés par le gonflement d'un ballonnet 8 également en matériau hémocompatible, dont le volume peut varier entre 0,25 et 1,50 centimètre/cube environ. The arms 2 are spaced apart by the inflation of a balloon 8 also hemocompatible material, whose volume can vary between 0.25 and 1.50 centimeter / cube about.

Le produit utilise pour le gonflage du ballonnet 8 est soit un sérum, soit un liquide radio-opaque. The product used for inflating the balloon 8 is either a saline or a radiopaque fluid.

Le gonflage du ballonnet est déterminé de façon a ce que la zone distale des branches 2 du filtre 1 s'applique sur environ deux centimètres sur la paroi interne de la veine cave inférieure 29. The balloon inflation is determined so that the distal region of the arms 2 of the filter 1 is applied to about two centimeters on the inner wall of the inferior vena cava 29.

Les branches 2 du filtre 1 sont reliées entre elles par un filament 12 hemocompatible, qui est enfilé a l'intérieur des orifices des branches, et qui constitue un maillage sur une longueur de #quatre centimètres environ des branches. The legs 2 of the filter 1 are interconnected by a filament 12 hemocompatible, which is threaded into the orifices of the legs, and which constitutes a mesh over a length of #quatre centimeters branches.

Le filament 12 décrit une spirale, et l'écart entre deux révolutions successives, mesure sur une branche 2, est variable et il diminue depuis le ballonnet 8 de cinq millimètres a environ deux millimètres. The filament 12 describes a spiral, and the gap between two successive revolutions, measurement on a branch 2 is variable and decreases from the balloon 8 of five millimeters to about two millimeters.

En se référant a l'échelle française des cathéters couramment utilisée, le cathéter porte-#flltre est de taille 8F, soit environ 2,66 millimètres de diamètre, il est monte dans une gaine extérieure d'introduction 16 de taille 9F dont la longueur est de cent dix centimètres environ et les matériaux utilisés sont également hemo-compatibles. Referring to the French scale commonly used catheters, the catheter is flltre carrier # 8F size, about 2.66 millimeters in diameter, is mounted in an outer sheath introducer 16 9F size whose length is one hundred and ten centimeters and the materials used are hemo-compatible.

Il va de soi que les chiffres ne sont donnes qu'a titre indicatif et n'ont pas de valeur limitative pour l'invention. Obviously the numbers are not data has indicative and have no limiting value for the invention.

Le filtre selon l'invention et son cathéter porteur de filtre permettent donc une obturation partielle et temporaire de la veine cave inférieure chez un être humain. The filter according to the invention and its filter delivery catheter thus allow a partial and temporary blockage of the inferior vena cava in a human.

Le filtre permet également de la même manière l'obturation partielle et temporaire d'une autre veine. The filter also allows the same way the partial and temporary closure of another vein.

Il présente l'avantage principale d'avoir une action temporaire c'est a dire principalement préventive. It has the main advantage of having a temporary action that is to say mainly preventive.

Cependant, le filtre selon l'invention peut également être implante de manière définitive a l'intérieur d'une veine et notamment de la veine cave inférieure. However, the filter of the invention can also be implanted permanently in the interior of a vein including the inferior vena cava.

Naturellement, la présente description n'est donnée qu'a titre indicatif et l'on pourrait adopter d'autres mises en oeuvre de l'invention sans pour autant sortir du cadre de celle-ci. Of course, this description is given only as an indication and could adopt other implementations of the invention without departing from the scope thereof.

En particulier, on pourrait adjoindre au cathéter d'autres moyens lui permettant de remplir des fonctions connues par exemple d'endoscopie. In particular, could be added to the catheter other means enabling it to fulfill functions known e.g. endoscopy.

Claims (10)

    REVENDICATIONS
  1. 1. Filtre pour l'interruption partielle et au moins temporaire d'une veine, notamment la veine cave inférieure d'un être humain, dans le but de retenir les caillots et d'éviter une embolie pulmonaire ou une récidive, comprenant une pluralité de branches (2) flexibles, réunies entre elles a leur extrémité proximale (3) s'étendant au repos approximativement parallèlement entre elles selon la génératrice d'un cylindre, jusqu'à leur extrémité distale (4) CARACTERISE par le fait qu'il comprend des moyens déformables d'expansion réversible des branches (2), commandables à distance, qui sont situés à l'intérieur du cylindre défini par les branches (2) au repos et qui, par déformation, exercent sur les branches (2) une poussée par l'intérieur de façon à les déployer à la manière des branches d'une ombrelle, d'une amplitude suffisante pour que chaque branche (2) soit appliquée au moins dans sa zone distale (10) contre la paroi de la veine (29). 1. Filter for the partial and at least temporary interruption of a vein, particularly the inferior vena cava of a human being, in order to retain the clot and prevent pulmonary embolism or recurrence, comprising a plurality of branches (2) flexible, joined together at their proximal end (3) extending at rest approximately parallel to each other along the generatrix of a cylinder to the distal end (4) cHARACTERIZED in that it comprises deformable means reversible expansion legs (2), controllable distance, which are located within the cylinder defined by the legs (2) at rest and which, by deformation, exerted on the legs (2) a thrust from the inside so as to deploy them in the manner of the branches of an umbrella, of sufficient magnitude so that each leg (2) is applied at least in its distal region (10) against the wall of the vein (29 ).
  2. 2. Filtre selon la revendication 1, caractérisé par le fait que les moyens d'expansion des branches (2) comprennent un ballonnet (8) expansible, gonflable à distance de manière réglable, qui est situe à l'intérieur du cylindre défini par les branches (2) et qui, par déformation, s'expanse au moins radialement et exerce une poussée sur celles-ci et les déploie a la manière des branches d'une ombrelle. 2. Filter according to claim 1, characterized in that the branches of the expansion means (2) comprises a balloon (8) expandable, inflatable remotely adjustable manner, which is located within the cylinder defined by the legs (2) and which, by deformation, at least radially expands and exerts a thrust on the latter and deploys in the manner of the branches of an umbrella.
  3. 3. Filtre selon la revendication 2 caractérisé par le fait que le ballonnet (8) est traverse longitudinalement de part en part par l'extrémité (6) d'un conduit (15) sur lequel il est emmanché de façon étanche et que le conduit (15) relie l'intérieur du ballonnet à des moyens de gonflage extérieurs. 3. Filter according to claim 2 characterized in that the balloon (8) passes longitudinally from one side by the end (6) of a duct (15) on which it is fitted sealingly and the conduit (15) connects the interior of the balloon external inflating means.
  4. 4. Filtre selon l'une quelconque des revendications 1 à 3 caractérisé par le fait que ces branches (2) sont, au moins dans leur zone proximale (11), reliées par au moins un filament souple (12), de façon à constituer un maillage. 4. A filter according to any one of claims 1 to 3 characterized in that the branches (2) are, at least in the proximal region (11), connected by at least one flexible filament (12), so as to constitute a mesh.
  5. 5. Filtre selon la revendication 4 caractérisé par le fait que le filament souple (12) est unique, qu'il est enfilé dans des orifices répartis sur la zone proximale 11 des branches et qu'il relie les branches successivement l'une après l'autre en décrivant sensiblement une spirale qui se referme radialement vers le ballonnet (8). 5. Filter according to claim 4 characterized in that the flexible filament (12) is unique, that is threaded through holes distributed over the proximal region 11 of the branches and that it connects the branches successively one after other substantially describing a spiral which closes radially towards the balloon (8).
  6. 6. Cathéter porteur du filtre selon l'une quelconque des revendications 1 à 5 pour l'interruption partielle ou au moins temporaire d'une veine notamment de la veine cave inférieure d'un être humain, d'une longueur suffisante pour que son extrémité distale (13) que prolonge le filtre (1) soit au niveau de la veine a obturer partiellement et que son extrémité proximale (14) soit en dehors du corps du patient, le cathéter comprenant un conduit longiligne (15) susceptible de coulisser longitudinalement a l'intérieur d'une gaine extérieure d'introduction (16) dans l'extrémité distale (17) de laquelle le filtre (1) est susceptible d'être logé à l'état replié, 6. The carrier catheter of the filter according to any one of claims 1 to 5 for the partial interruption or at least temporarily of a vein including the inferior vena cava of a human being, of a sufficient length that its end distal (13) that extends the filter (1) is at the vein partially close and that its proximal end (14) is outside the patient's body, the catheter comprising a conduit elongate (15) capable of sliding longitudinally a within an outer sheath introducer (16) in the distal end (17) of which the filter (1) can be accommodated in the folded state,
    CARACTERISE par le fait qu'il comprend des moyens réversibles pour commander depuis son extrémité proximale (14) le déploiement des branches (2) du filtre (1) et pour régler l'amplitude du dit déploiement. CHARACTERIZED in that it comprises reversible means for controlling from the proximal end (14) the deployment of the legs (2) of the filter (1) and for adjusting the amplitude of said deployment.
  7. 7. Cathéter selon la revendication 6 caractérisé par le fait qu'il comprend en outre des moyens pour infuser dans le sang, au voisinage du filtre (1), une substance liquide depuis son extrémité proximale (14). 7. The catheter of claim 6 characterized in that it further comprises means for infusing blood, in the vicinity of the filter (1), a liquid substance from its proximal end (14).
  8. 8. Cathéter selon la revendication 2 ou 6 caractérisé par le fait que les moyens comprennent une canalisation (20) parcourant le conduit (15) débouchant au niveau de son extrémité distale a l'intérieur du ballonnet (8) et présentant à son extrémité proximale des moyens (22) pour injecter dans le ballonnet un volume défini de fluide et pour aspirer le dit volume. 8. The catheter of claim 2 or 6 characterized in that the means comprise a duct (20) traversing the duct (15) opening at its distal end to the interior of the balloon (8) and having at its proximal end means (22) for injecting into the balloon a defined volume of fluid and for aspirating the said volume.
  9. 9. Cathéter selon la revendication 7 caractérisé par le fait que les dits moyens comprennent une canalisation d'infusion (23) parcourant le dit conduit (15) débouchant au niveau de son extrémité distale par un orifice (24) situé à l'intérieur des branches (2) et par au moins un orifice (25) situé en arrière du filtre et présentant du côté de son extrémité proximale, des moyens (26) pour la raccorder à des moyens d'infusion. 9. The catheter of claim 7 characterized in that said means comprises an infusion line (23) traversing said duct (15) opening at its distal end by an orifice (24) located inside the legs (2) and at least one orifice (25) located behind the filter and having the side of its proximal end, means (26) for connecting it to the infusion means.
  10. 10. Cathéter selon la revendication 6 caractérisé par le fait qu'il présente en outre un guide d'introduction (27) le long duquel il est susceptible de coulisser. 10. The catheter of Claim 6 characterized in that it further has an insertion guide (27) along which it is slidable.
FR8506459A 1985-04-22 1985-04-22 Filter for the partial and at least temporary interruption of a vein catheter and the filter carrier Expired FR2580504B1 (en)

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Cited By (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293605A1 (en) * 1987-05-22 1988-12-07 Boston Scientific Corporation Implantable filter
US4873978A (en) * 1987-12-04 1989-10-17 Robert Ginsburg Device and method for emboli retrieval
FR2632848A1 (en) * 1988-06-21 1989-12-22 Lefebvre Jean Marie Filter medical use
FR2643250A1 (en) * 1989-02-20 1990-08-24 Lg Medical Sa Device for operating on the cardiovascular system and permitting in particular the treatment of thrombi
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