FR2645028A1 - Improvement to the devices for positioning a releasable element, such as an expandable and releasable filter, inside a vascular conduit - Google Patents
Improvement to the devices for positioning a releasable element, such as an expandable and releasable filter, inside a vascular conduit Download PDFInfo
- Publication number
- FR2645028A1 FR2645028A1 FR8904636A FR8904636A FR2645028A1 FR 2645028 A1 FR2645028 A1 FR 2645028A1 FR 8904636 A FR8904636 A FR 8904636A FR 8904636 A FR8904636 A FR 8904636A FR 2645028 A1 FR2645028 A1 FR 2645028A1
- Authority
- FR
- France
- Prior art keywords
- pusher
- catheter
- hand
- diameter
- releasable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- A61F2/0105—Open ended, i.e. legs gathered only at one side
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
-
- 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
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/30—Surgical pincettes without pivotal connections
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
- A61B2017/00473—Distal part, e.g. tip or head
-
- 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
- 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
- A61F2230/0073—Quadric-shaped
- A61F2230/0078—Quadric-shaped hyperboloidal
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Surgery (AREA)
- Ophthalmology & Optometry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
L'invention se rapporte à un perfectionnement aux dispositifs de pose dans un conduit vasculaire d'un élément largable tel un filtre expansible largable qui présente au moins une portée globalement cylindrique et sensiblement axiale. The invention relates to an improvement to devices for placing a releasable element in a vascular conduit such as a releasable expandable filter which has at least a generally cylindrical and substantially axial bearing.
L'invention concerne spécialement les dispositifs de pose qui mettent principalement en oeuvre un cathéter tubulaire et un poussoir monté coulissant dans le dit cathéter et permettant de chasser un élément filtrant pour le larguer en une zone prédéterminée au niveau de laquelle l'extremité distale du dit cathéter a préalablement été amenée, pour y déboucher. The invention especially relates to delivery devices which mainly use a tubular catheter and a plunger slidingly mounted in said catheter and making it possible to drive out a filter element in order to release it into a predetermined area at which the distal end of said device catheter has previously been brought in to open.
Par extrémité distale, on désigne l'extrémité qui, engagée dans le conduit vasculaire, est opposée a celle dite proximale par laquelle le chirurgien manoeuvre le poussoir. By distal end, we mean the end which, engaged in the vascular duct, is opposite to that called proximal by which the surgeon operates the pusher.
Plus particulierement mais non exclusivement, l'invention concerne un perfectionnement aux dispositifs de pose de filtres du type comportant une pluralité de branches relativement flexibles, sensiblement courbes et réunies par l'une de leurs extrémités de manière à former un faisceau d'enveloppe sensiblement conique du fait de la divergence des branches depuis leur point de réunion. More particularly but not exclusively, the invention relates to an improvement to devices for fitting filters of the type comprising a plurality of relatively flexible branches, substantially curved and joined by one of their ends so as to form a bundle of substantially conical envelope. due to the divergence of the branches from their meeting point.
Sur ces filtres, au moins certaines des extrémités libres des branches sont pourvues d'un crochet d'ancrage dans la paroi vasculaire évidemment pour autant que le diamètre du cercle sur lequel se situent les crochets d'ancrage en position expansée du filtre, ait été choisi légèrement supérieur à celui qu'a le conduit vasculaire au niveau de la zone de largage. On these filters, at least some of the free ends of the branches are provided with an anchoring hook in the vascular wall obviously provided that the diameter of the circle on which the anchoring hooks are located in the expanded position of the filter, has been chosen slightly higher than that of the vascular duct at the level of the release zone.
Egalement, la flexibilité des branches est ajustée de manière telle que, par l'action qu'elles développent à leurs extrémités. les crochets puissent trouver un ancrage suffisant dans la dite paroi. Also, the flexibility of the branches is adjusted in such a way that, by the action that they develop at their ends. the hooks can find sufficient anchoring in said wall.
Pour sa pose, tel que cela a été évoqué, le filtre est expulsé d'un conduit tubulaire dit cathéter dans lequel on le place en position contractée, c'est à dire avec ses branches sensiblement parallèles en appui contre la paroi intérieure du tube. For its installation, as has been mentioned, the filter is expelled from a tubular conduit called catheter in which it is placed in the contracted position, that is to say with its substantially parallel branches bearing against the inner wall of the tube.
Comme, d'une part, généralement les crochets d'ancrage de tels filtres sont particulièrement acérés et orientés pour produire l'immobilisation de chaque filtre essentiellement dans la direction de convergence des branches vers leur point de réunion et, d'autre part, le matériau qui constitue la paroi tubulaire du cathéter est relativement plastique, pour éviter l'ancrage du filtre dans la paroi dudit cathéter, lors de la pose, on expulse évidemment ce filtre dans la direction opposée a celle dans laquelle se produit l'ancrage. As, on the one hand, generally the hooks for anchoring such filters are particularly sharp and oriented to produce the immobilization of each filter essentially in the direction of convergence of the branches towards their meeting point and, on the other hand, the material constituting the tubular wall of the catheter is relatively plastic, to avoid anchoring the filter in the wall of said catheter, during installation, this filter is obviously expelled in the direction opposite to that in which the anchoring occurs.
Tel que cela a pu être constaté de nombreuses fois, lors de l'expulsion du filtre, ses branches viennent en s'ouvrant prendre appui sur la périphérie de l'ouverture distale du cathéter ce qui, a un moment donné en raison de la courbure des dites branches et de leur flexibilité, induit par réaction élastique des branches l'éjection non contrôlée du filtre. As it has been observed many times, during the expulsion of the filter, its branches come to open and bear on the periphery of the distal opening of the catheter which, at some point due to the curvature said branches and their flexibility, induced by elastic reaction of the branches uncontrolled ejection of the filter.
La réaction élastique est telle que l'éjection induit le déplacement du filtre a plusieurs centimètres de l'extrémité distale du cathéter. The elastic reaction is such that the ejection induces the displacement of the filter several centimeters from the distal end of the catheter.
On déplore surtout que cette éjection peut induire un mauvais positionnement du filtre, voire un défaut d'ancrage dans la paroi vasculaire. We especially deplore that this ejection can induce a bad positioning of the filter, even a defect of anchoring in the vascular wall.
Pour entraver l'éjection du filtre, on pourrait être tenté, tel que cela est prévu dans le brevet FR-A-2.606.64l d'équiper la partie terminale du filtre au niveau de laquelle sont réunies ses branches d'un anneau dans lequel serait passé un fil de longueur au moins suffisante pour que ses extrémités dépassent du cathéter au niveau de son extrémité proximale. To hinder the ejection of the filter, one could be tempted, as provided in patent FR-A-2,606.64l to equip the terminal part of the filter at the level of which are joined its branches with a ring in which would have passed a wire of at least sufficient length so that its ends project beyond the catheter at its proximal end.
Par cela, le chirurgien pourrait alors en contrlant la tension de la boucle conjointement au déplacement du poussoir, provoquer l'expulsion totalement contrôlée du filtre. By this, the surgeon could then by controlling the tension of the loop in conjunction with the movement of the pusher, cause the totally controlled expulsion of the filter.
Pour libérer le filtre du fil, il suffirait ensuite au chirurgien de tirer sur l'une des extrémités du dit fil jusqu'à désengaoer l'autre extrémité de l'anneau. To release the filter from the wire, the surgeon would then only have to pull on one end of the said wire until the other end of the ring is disengaged.
Cette solution reste en fait tres théorique car se pose au moins, le problème du montage de l'ensemble que constituent le cathéter, le poussoir, le fil et le filtre s'il doit être effectué en salle d'opération. This solution remains in fact very theoretical because at least there is the problem of mounting the assembly which constitutes the catheter, the plunger, the wire and the filter if it is to be carried out in the operating room.
Egalement, d'autres problèmes entravent l'utilisation de cette solution technologique telle la conception du poussoir pour éviter le risque de coincement du a la présence du fil au long de ses génératrices. Also, other problems hamper the use of this technological solution such as the design of the pusher to avoid the risk of jamming due to the presence of the wire along its generatrices.
Un résultat que l'invention vise à obtenir est un perfectionnement aux dispositifs de pose d'éléments largables qui permette de remédier à l'ensemble de ces Inconvénients. A result which the invention aims to obtain is an improvement to the devices for placing releasable elements which makes it possible to remedy all of these drawbacks.
A cet effet, l'invention a pour objet un perfectionnement aux dispositifs précités, lequel est notamment caractérisé en ce que
- l'extrémité distale du poussoir d'une part, comprend, au moins lorsqu'elle est observée en position engagée dans le cathéter, un alésage sensiblement axial qui, lorsqu'il est vide, est de diamètre légèrement Inférieur au diamètre de la portée cylindrique de l'élément largable,
- d'autre part, au moins au niveau de cet alésage distal, la paroi du poussoir qui le délimite est au moins diamétralement élastiquement déformable.To this end, the subject of the invention is an improvement to the aforementioned devices, which is in particular characterized in that
- the distal end of the pusher on the one hand, comprises, at least when observed in the position engaged in the catheter, a substantially axial bore which, when empty, is of diameter slightly less than the diameter of the seat cylindrical of the releasable element,
- on the other hand, at least at the level of this distal bore, the wall of the pusher which delimits it is at least diametrically elastically deformable.
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
- figures 1 à 2 : vu à grande échelle et en coupe longitudinale un dispositif de pose doté du perfectionnement selon l'invention.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
- Figures 1 to 2: seen on a large scale and in longitudinal section a laying device with the improvement according to the invention.
En se reportant au dessin, on voit un dispositif 1 de pose d'un élément 2 largable tel un filtre dans un conduit 3 notamment vasculaire. Referring to the drawing, we see a device 1 for installing a releasable element 2 such as a filter in a duct 3, in particular vascular.
Tel que cela apparatt, le dispositif J de pose comprend
- d'une part, au moins un cathéter 4 c'est à dire un tube en matériau semi-rigide, d'assez grande longueur il par rapport à son diamètre notamment interne D1 et qui présente deux extrémités 5, 6 opposées et ouvertes et,
- d'autre part, au moins un poussoir 7 c'est à dire une tige longiligne en matériau également semi-rigide, comportant évidemment deux extrémités opposées 8, 9 et qui est de longueur
L2 comparable à celle L1 du cathéter et de diamètre D2 légèrement inférieur à celui D1 interne du dit cathéter, de manière à pouvoir y etre montée coulissante.As it appears, the installation device J comprises
on the one hand, at least one catheter 4, that is to say a tube made of semi-rigid material, of relatively long length relative to its notably internal diameter D1 and which has two ends 5, 6 opposite and open and ,
- on the other hand, at least one pusher 7, that is to say a long rod made of also semi-rigid material, obviously having two opposite ends 8, 9 and which is of length
L2 comparable to that L1 of the catheter and of diameter D2 slightly smaller than that D1 internal of said catheter, so as to be able to be mounted therein sliding.
Tel que cela est représenté, le poussoir 7 comporte par exemple un canal axial 7a
Tant sur le cathéter 4 que sur le poussoir 7 on distingue d'une part, une extrémité dite proximale 5, 8 destinée à rester hors du vaisseau choisi pour le passage du cathéter vers une zone 10 choisie pour la pose de l'élément largable 2 et, d'autre part, une extrémité dite distale 6, 9 précisément destinée à étre engagée dans le conduit vasculaire 3usgu'au niveau de la zone 10 intéressée pour la pose de l'élément largable.As shown, the pusher 7 comprises for example an axial channel 7a
Both on the catheter 4 and on the pusher 7 there is on the one hand, a so-called proximal end 5, 8 intended to remain outside the vessel chosen for the passage of the catheter towards a zone 10 chosen for the placement of the releasable element 2 and, on the other hand, a so-called distal end 6, 9 precisely intended to be engaged in the vascular conduit 3usgu' at the level of the zone 10 concerned for the placement of the releasable element.
Classiquement, les extrémités distales 6, 9 du cathéter 4 et du poussoir 7 sont adoucies voire arrondies. Conventionally, the distal ends 6, 9 of the catheter 4 and of the pusher 7 are softened or even rounded.
Sur les figures, compte-tenu de l'échelle de représentation, seules les parties distale et proximale de ces organes ont été représentées. In the figures, taking into account the scale of representation, only the distal and proximal parts of these organs have been represented.
Comme cela est représenté, l'élément 2 largable est, par exemple, un filtre du type comportant une pluralité de branches
Il relativement flexibles, sensiblement courbes, et réunies par l'une 12 de leurs extrémités 12,- 13 de manière à former un faisceau d'enveloppe sensiblement conique du fait de la divergence des branches depuis leur point de réunion.As shown, the releasable element 2 is, for example, a filter of the type comprising a plurality of branches
It relatively flexible, substantially curved, and joined by one 12 of their ends 12, - 13 so as to form a bundle of substantially conical envelope due to the divergence of the branches from their meeting point.
Quoiou'il en soit, l'élément largable 2 présente au moins une portée globalement cylindrique 14 de longueur L3 dont d'une part l'axe 15 est sensiblement aligné sur celui longitudinal 16 du dit élément et d'autre part dont le diamètre d'enveloppe D3 est inférieur à celui D2 du poussoir 7. Anyway, the releasable element 2 has at least one generally cylindrical bearing surface 14 of length L3, on the one hand the axis 15 is substantially aligned with that longitudinal 16 of said element and on the other hand, the diameter d envelope D3 is less than that D2 of pusher 7.
Selon l'invention, le perfectionnement apporte au dispositif de pose est caractérisé en ce que :
- l'extrémité distale 9 du poussoir d'une part comprend, au moins lorsqu'elle est observée en position engagée dans le cathéter, un alésage 17 sensiblement axial qui, lorsqu'il est vide, est de diamètre D4 légèrement inférieur au diamètre D3 de la portée cylindrique 14 de l'élément largable 2f
- d'autre part, au moins au niveau de cet alésage distal, 17 la paroi 18 du poussoir qui le délimite est au moins diamétralement élastiquement déformable.According to the invention, the improvement brought to the laying device is characterized in that:
on the one hand, the distal end 9 of the pusher comprises, at least when it is observed in the position engaged in the catheter, a substantially axial bore 17 which, when empty, is of diameter D4 slightly less than the diameter D3 of the cylindrical seat 14 of the releasable element 2f
- on the other hand, at least at this distal bore, 17 the wall 18 of the pusher which delimits it is at least diametrically elastically deformable.
Le respect de ces premières caractéri#tiques techniques permet en quelque sorte de former à l'extrémité distale 9 du poussoir 7, une pince dans laquelle la portée cylindrique 14 de l'élément largable 2 peut être engagée pour y autre maintenue au moins par le serrage de la paroi de cet alésage sur la dite portée, serrage qui est induit lorsque l'extrémité distale du poussoir se trouve engagée dans le cathéter. Compliance with these first technical characteristics makes it possible, in a way, to form, at the distal end 9 of the pusher 7, a clamp in which the cylindrical bearing surface 14 of the releasable element 2 can be engaged for the other held there at least by the tightening of the wall of this bore on said bearing, tightening which is induced when the distal end of the pusher is engaged in the catheter.
En effet, l'introduction de la portée cylindrique 14 dans l'alésage distal du poussoir provoque une augmentation du diamètre D2 distal du dit poussoir, laquelle augmentation supprime localement le jeu de coulissement entre le cathéter et le poussoir et induit donc un certain serrage de la portée cylindrique de l'élément sans toutefois empêcher le coulissemest lui-meme. Indeed, the introduction of the cylindrical seat 14 in the distal bore of the pusher causes an increase in the distal diameter D2 of said pusher, which increase locally eliminates the sliding clearance between the catheter and the pusher and therefore induces a certain tightening of the cylindrical bearing of the element without, however, preventing the sliding itself.
De préférence, dans la paroi 18 du poussoir qui délimite l'alésage 17 distal est aménagée au moins une fente 19 longitudinale de longueur 15 prédéterminée, ce qui lui confère au moins en partie l'élasticité diamétrale recherchée. Preferably, in the wall 18 of the pusher which delimits the distal bore 17 is arranged at least one longitudinal slot 19 of predetermined length, which gives it at least in part the desired diametrical elasticity.
Conformément à l'invention, le diamètre D4 de l'alésage distal 17 du poussoir 7 est inférieur au diamètre D3 de la portée cylindrique 14 de l'élément largable d'une valeur sensiblement égale à la différence entre le diamètre intérieur
Dl du cathéter et celui D2 externe du poussoir 7.According to the invention, the diameter D4 of the distal bore 17 of the pusher 7 is less than the diameter D3 of the cylindrical seat 14 of the releasable element by a value substantially equal to the difference between the internal diameter
Dl of the catheter and D2 of the external pusher 7.
Selon l'invention, l'alésage distal 17 du poussoir a une longueur L4 et cette longueur est sensiblement inférieure celle L3 de la portée cylindrique 14 de l'élément largable. According to the invention, the distal bore 17 of the pusher has a length L4 and this length is substantially less than that L3 of the cylindrical seat 14 of the releasable element.
Suivant l'invention, la longueur L5 de la fente 19 distale du poussoir est sensiblement égale à la longueur L4 de l'alésage distal du dit poussoir. According to the invention, the length L5 of the distal slot 19 of the pusher is substantially equal to the length L4 of the distal bore of said pusher.
De préférence, dans la paroi 18 du poussoir qui délimite l'alésage 17 distal, sont aménagées deux fentes globalement diamètrement opposées. Preferably, in the wall 18 of the pusher which delimits the distal bore 17, two generally diametrically opposite slots are arranged.
Le canal axial 7a du poussoir 7 permet avantageusement s'il y a lieu de chasser la portée cylindrique de l'élément largable, de l'alésage distal du poussoir au moyen d'un fil semi-rigide introduit dans ledit canal depuis l'extrémité proximale du poussoir. The axial channel 7a of the pusher 7 advantageously makes it possible, if there is reason to drive the cylindrical seat of the releasable element, from the distal bore of the pusher by means of a semi-rigid wire introduced into said channel from the end proximal of the pusher.
On conçoit que ces particularités techniques permettent de maintenir efficacement l'élément largable 2 jusqu'à ce que l'extrémité distale 9 du poussoir 7 ait été complètement dégagée du cathéter 4 (figure 2). It will be appreciated that these technical features make it possible to effectively maintain the releasable element 2 until the distal end 9 of the plunger 7 has been completely disengaged from the catheter 4 (FIG. 2).
Egalement on note que la technologie mise en oeuvre est loin d'être complexe et/ou onéreuse. We also note that the technology used is far from being complex and / or expensive.
Notamment, la mise en oeuvre du perfectionnement considéré n'implique normalement pas d'augmenter les diamètres interne et externe du cathéter initialement prévus pour la pause des éléments largables. In particular, the implementation of the improvement considered does not normally imply increasing the internal and external diameters of the catheter initially planned for the pause of the releasable elements.
Le montage du poussoir 7 et de l'élément largable 2 dans le cathéter 4 est reste simple et peut donc étre effectué par le chirurgien préalablement a l'utilisation. The mounting of the pusher 7 and the releasable element 2 in the catheter 4 is simple and can therefore be carried out by the surgeon before use.
Avantageusement la stérilisation des organes précités peut donc être réalisée tres efficacement puisqu'elle peut être effectuée sur chacun desdits organes lorsqu'ils sont séparés. Advantageously, the sterilization of the aforementioned organs can therefore be carried out very effectively since it can be carried out on each of said organs when they are separated.
A titre d'exemple, on signale qu'un prototype a pu être réalisé pour un cathéter de diamètre externe de quatre millimètres et de diamètre interne de trois millimètres quatre, dans lequel coulisse un poussoir de trois millimètres trois. By way of example, it is reported that a prototype could have been produced for a catheter with an external diameter of four millimeters and an internal diameter of three millimeters four, in which a pusher of three millimeters three slides.
Le diamètre de la portée cylindrique de l'élément largable étant de deux millimètres, on a obtenu un serrage efficace en réalisant dans l'extrémité distale du poussoir un alésage d'un diagnetre d'un millimètre neuf. The diameter of the cylindrical bearing surface of the releasable element being two millimeters, an effective tightening was obtained by carrying out in the distal end of the pusher a bore of a diagnosis of one new millimeter.
Par serrage efficace on comprendra un serrage au moins suffisant pour entraver l'éjection d'un élément largable tel un filtre expansible qui a tendance a développer contre l'ouverture distale du cathéter une réaction d'expulsion élastique. By effective clamping is understood a clamping at least sufficient to hinder the ejection of a releasable element such as an expandable filter which tends to develop against the distal opening of the catheter an elastic expulsion reaction.
Evidemment la longueur L2 du poussoir est au moins suffisante pour permettre a celui-ci, en position avancée, de dégager au moins les fentes ménagées a son extrémité distale, ce qui alors supprime l'effet de retenue puisqu'au sortir du cathéter at hé ter les machoires des pinces formées a cette extrémité distale du poussoir redeviennent libres et s'entrouvrent naturellenent pour libérer alors le filtre. Obviously the length L2 of the pusher is at least sufficient to allow it, in the advanced position, to release at least the slots provided at its distal end, which then removes the retaining effect since leaving the catheter at hey ter the jaws of the pliers formed at this distal end of the pusher become free again and open naturally to release the filter.
La manipulation de retrait du poussoir favorise en outre l'ancrage des griffes du filtre dans les parois de la veine cave. The manipulation of withdrawal of the pusher further promotes the anchoring of the claws of the filter in the walls of the vena cava.
Dans la pratique, la libération de la portée cylindrique 14 d'un filtre largable 2 s'effectue par déplacement du cathéter par rapport au poussoir, puisque le filtre a dejà trouve ancrage dans la paroi du vaisseau 3 qui le reçoit. In practice, the release of the cylindrical seat 14 of a releasable filter 2 is effected by displacement of the catheter relative to the pusher, since the filter has already found anchoring in the wall of the vessel 3 which receives it.
Le déplacement du cathéter a d'ailleurs été symbolisé en figure 2 par une flèche repérée 20. The displacement of the catheter has moreover been symbolized in FIG. 2 by an arrow marked 20.
On notera qu'en figure 2, l'alésage 17 se trouve également représenté en pointillés lorsqu'il est vide et en position engagée de l'extrémité distale 9 du poussoir 7 dans le cathéter 4. It will be noted that in FIG. 2, the bore 17 is also shown in dotted lines when it is empty and in the engaged position of the distal end 9 of the pusher 7 in the catheter 4.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8904636A FR2645028B1 (en) | 1989-03-30 | 1989-03-30 | IMPROVEMENT IN DEVICES FOR LAYING IN A VASCULAR CONDUIT OF A WIDTHABLE ELEMENT SUCH AS A WIDE EXPANDABLE FILTER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8904636A FR2645028B1 (en) | 1989-03-30 | 1989-03-30 | IMPROVEMENT IN DEVICES FOR LAYING IN A VASCULAR CONDUIT OF A WIDTHABLE ELEMENT SUCH AS A WIDE EXPANDABLE FILTER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2645028A1 true FR2645028A1 (en) | 1990-10-05 |
| FR2645028B1 FR2645028B1 (en) | 1991-07-12 |
Family
ID=9380512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8904636A Expired - Fee Related FR2645028B1 (en) | 1989-03-30 | 1989-03-30 | IMPROVEMENT IN DEVICES FOR LAYING IN A VASCULAR CONDUIT OF A WIDTHABLE ELEMENT SUCH AS A WIDE EXPANDABLE FILTER |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2645028B1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0587782A1 (en) * | 1991-06-07 | 1994-03-23 | MARKS, Michael P. | Retractable-wire catheter device and method |
| FR2718950A1 (en) * | 1994-04-21 | 1995-10-27 | Braun Celsa Sa | Temporary or long-term blood filter |
| FR2718949A1 (en) * | 1994-04-21 | 1995-10-27 | Braun Celsa Sa | Device for implanting and using a blood filter for temporary or permanent use and corresponding filter. |
| EP0717969A2 (en) * | 1994-12-22 | 1996-06-26 | Target Therapeutics, Inc. | Implant delivery assembly with expandable coupling/decoupling mechanism |
| US5634942A (en) * | 1994-04-21 | 1997-06-03 | B. Braun Celsa | Assembly comprising a blood filter for temporary or definitive use and a device for implanting it |
| EP0903110A1 (en) * | 1997-09-12 | 1999-03-24 | B. Braun Medical Inc. | Introducer for an expandable vascular occlusion device |
| US5895410A (en) * | 1997-09-12 | 1999-04-20 | B. Braun Medical, Inc. | Introducer for an expandable vascular occlusion device |
| EP0947168A3 (en) * | 1998-03-13 | 1999-11-03 | B. Braun Celsa | Covered self-expanding vascular occlusion device |
| WO2004026393A2 (en) * | 2002-09-23 | 2004-04-01 | Medtronic, Inc. | Medical device delivery system |
| WO2006041587A1 (en) * | 2004-10-05 | 2006-04-20 | Boston Scientific Limited | Detachable shaft medical retrieval device and related methods of use |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2103284A5 (en) * | 1970-07-28 | 1972-04-07 | Vyzk Ustav Kozedelny | |
| US3952747A (en) * | 1974-03-28 | 1976-04-27 | Kimmell Jr Garman O | Filter and filter insertion instrument |
| US4627420A (en) * | 1983-10-31 | 1986-12-09 | Katz Harry R | Needle inserting instrument for interstitial radiotherapy |
| EP0276104A2 (en) * | 1987-01-21 | 1988-07-27 | American Medical Systems, Inc. | Apparatus for removal of objects from body passages |
-
1989
- 1989-03-30 FR FR8904636A patent/FR2645028B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2103284A5 (en) * | 1970-07-28 | 1972-04-07 | Vyzk Ustav Kozedelny | |
| US3952747A (en) * | 1974-03-28 | 1976-04-27 | Kimmell Jr Garman O | Filter and filter insertion instrument |
| US4627420A (en) * | 1983-10-31 | 1986-12-09 | Katz Harry R | Needle inserting instrument for interstitial radiotherapy |
| EP0276104A2 (en) * | 1987-01-21 | 1988-07-27 | American Medical Systems, Inc. | Apparatus for removal of objects from body passages |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0587782A1 (en) * | 1991-06-07 | 1994-03-23 | MARKS, Michael P. | Retractable-wire catheter device and method |
| EP0587782A4 (en) * | 1991-06-07 | 1994-07-13 | Michael P Marks | Retractable-wire catheter device and method |
| US5634942A (en) * | 1994-04-21 | 1997-06-03 | B. Braun Celsa | Assembly comprising a blood filter for temporary or definitive use and a device for implanting it |
| FR2718949A1 (en) * | 1994-04-21 | 1995-10-27 | Braun Celsa Sa | Device for implanting and using a blood filter for temporary or permanent use and corresponding filter. |
| FR2718950A1 (en) * | 1994-04-21 | 1995-10-27 | Braun Celsa Sa | Temporary or long-term blood filter |
| EP0717969A2 (en) * | 1994-12-22 | 1996-06-26 | Target Therapeutics, Inc. | Implant delivery assembly with expandable coupling/decoupling mechanism |
| EP0717969A3 (en) * | 1994-12-22 | 1996-11-27 | Target Therapeutics Inc | Implant delivery assembly with expandable coupling/decoupling mechanism |
| US6849081B2 (en) | 1994-12-22 | 2005-02-01 | Scimed Life Systems, Inc. | Implant delivery assembly with expandable coupling/decoupling mechanism |
| US5814062A (en) * | 1994-12-22 | 1998-09-29 | Target Therapeutics, Inc. | Implant delivery assembly with expandable coupling/decoupling mechanism |
| EP1537838A1 (en) * | 1994-12-22 | 2005-06-08 | Boston Scientific Limited | Implant delivery assembly with expandable coupling/decoupling mechanism |
| EP1290988A1 (en) * | 1994-12-22 | 2003-03-12 | Boston Scientific Limited | Implant delivery assembly with expandable coupling/decoupling mechanism |
| EP0903110A1 (en) * | 1997-09-12 | 1999-03-24 | B. Braun Medical Inc. | Introducer for an expandable vascular occlusion device |
| US5895410A (en) * | 1997-09-12 | 1999-04-20 | B. Braun Medical, Inc. | Introducer for an expandable vascular occlusion device |
| US5984944A (en) * | 1997-09-12 | 1999-11-16 | B. Braun Medical, Inc. | Introducer for an expandable vascular occlusion device |
| EP0947168A3 (en) * | 1998-03-13 | 1999-11-03 | B. Braun Celsa | Covered self-expanding vascular occlusion device |
| US6589256B2 (en) | 1998-03-13 | 2003-07-08 | B. Braun Medical Sas | Covered self-expanding vascular occlusion device |
| US6221086B1 (en) | 1998-03-13 | 2001-04-24 | B. Braun Medical Sas | Covered self-expanding vascular occlusion device |
| WO2004026393A2 (en) * | 2002-09-23 | 2004-04-01 | Medtronic, Inc. | Medical device delivery system |
| WO2004026393A3 (en) * | 2002-09-23 | 2004-05-06 | Medtronic Inc | Medical device delivery system |
| WO2006041587A1 (en) * | 2004-10-05 | 2006-04-20 | Boston Scientific Limited | Detachable shaft medical retrieval device and related methods of use |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2645028B1 (en) | 1991-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1713414B1 (en) | Tubular prosthesis | |
| EP0925763B1 (en) | Assembly for placing an implant into an internal body conduit | |
| EP1909695B1 (en) | Device for treating a blood vessel | |
| EP1406543B1 (en) | Kit comprising a medical fixing element and a device for placing said fixing element | |
| EP1315458B1 (en) | Vascular occlusion device and apparatus for using same | |
| EP1898847B1 (en) | Kit for inserting a cavity-treatment element | |
| EP0191747B1 (en) | Contraceptive intra-uterine device and device for insertion and attachment to the uterine cavity wall | |
| EP1842508A1 (en) | Device for treating a blood circulation conduit and method of preparing this device | |
| FR2645028A1 (en) | Improvement to the devices for positioning a releasable element, such as an expandable and releasable filter, inside a vascular conduit | |
| FR2779939A1 (en) | Tubular mesh-support for a vein or artery insertion device | |
| FR2694687A1 (en) | Intra-vascular prosthesis for blood filtration and clot prevention - comprises series of flexible threads formed into arrangement of shaped loops, secured to distal end of tubular support portion | |
| FR2764500A1 (en) | APPLICATOR FOR THE PLACEMENT OF A SURGICAL NEEDLE | |
| FR2828263A1 (en) | IMPLANT IMPLANTATION DEVICE AND DEVICE IMPLANTATION METHOD | |
| FR2894131A1 (en) | DEVICE FOR TREATING A BLOOD VESSEL, AND ASSOCIATED TREATMENT NECESSARY. | |
| CA2399174A1 (en) | Hyper-elastic needle | |
| FR2777446A1 (en) | Anastomosis coupling for tubular prosthetic implant and duct such as blood vessel | |
| FR2696092A1 (en) | Kit for medical use composed of a filter and its device for placement in the vessel. | |
| FR2916959A1 (en) | NECESSARY TO BE IMPLANTED IN A BLOOD CIRCULATION CONDUIT | |
| FR2883062A1 (en) | FIXING DEVICE WITH AUTOMATIC CLOSING OF AN ELEMENT ON A FIXED SUPPORT | |
| EP1414372A2 (en) | Device for assembling blood vessels | |
| EP2005918B1 (en) | Tubular prosthesis and associated kit | |
| FR2946865A1 (en) | DEVICE FOR TREATING A BLOOD CIRCULATION CONDUIT | |
| WO2006102778A1 (en) | Self-locking connecting device | |
| EP2485680B1 (en) | Safety cartridge for a removable vena cava filter | |
| EP1006632A1 (en) | Device for maintaining a resilient sleeve in expansion, and process and device for expanding a resilient sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |