FR2616666A1 - Device of the catheter type for extracting and repositioning filters of the Greenfield or similar type which are wrongly positioned, through the vein - Google Patents

Device of the catheter type for extracting and repositioning filters of the Greenfield or similar type which are wrongly positioned, through the vein Download PDF

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Publication number
FR2616666A1
FR2616666A1 FR8708709A FR8708709A FR2616666A1 FR 2616666 A1 FR2616666 A1 FR 2616666A1 FR 8708709 A FR8708709 A FR 8708709A FR 8708709 A FR8708709 A FR 8708709A FR 2616666 A1 FR2616666 A1 FR 2616666A1
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France
Prior art keywords
extractor
filter
vein
greenfield
hook
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Withdrawn
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FR8708709A
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French (fr)
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SCIT SC
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SCIT SC
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Priority to FR8708709A priority Critical patent/FR2616666A1/en
Publication of FR2616666A1 publication Critical patent/FR2616666A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/011—Instruments for their placement or removal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • 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
    • A61F2230/0067—Three-dimensional shapes conical

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to a device allowing, through the vein, a wrongly positioned filter of the Greenfield type to be detached from the internal wall and to be moved. The device is composed of an extractor situated at one end of the catheter tube, a side adaptor allowing injections being situated at the other end. It is characterised by a hook situated at the end of a semi-rigid central rod, which makes it possible to secure the cap of the filter and to cause it to return by a relative reversed movement into the case of the extractor after having detached it from the vein.

Description

La présente invention concerne un extracteur réceptacle de filtre de Greenfield ou apparentés. Depuis de très nombreuses années la maladie thrombo-embolique relève dans certains cas d'une interruption partielle de veine cave. Ces interruptions partielles de veine cave ont pour but d'éviter la récidive embolique notamment lorsqu'il y a une contre-indication au traitement classique ou traitement anticoagulant. Depuis une dizaine d'années les techniques ont beaucoup évolué. Cela consiste sous anesthésie locale à dénuder chirurgicalement une grosse veine#périphérîque soit la veine jugulaire interne, soit la veine fémorale. La voie jugulaire interne est la plus utilisée actuellement. Lorsque cette veine est denudée on introduit un cathéter de gros calibre contenant à son extrémité distale une prothèse endo-vasculaire. The present invention relates to a Greenfield or related filter receptor extractor. For many years, thromboembolic disease has in some cases been a partial interruption of the vena cava. The aim of these partial vena cava interruptions is to avoid embolic recurrence, particularly when there is a contraindication to conventional treatment or anticoagulant treatment. Over the past ten years, techniques have evolved a lot. This involves under local anesthesia to surgically strip a large peripheral vein # either the internal jugular vein or the femoral vein. The internal jugular route is the most used currently. When this vein is exposed, a large caliber catheter is inserted containing an endovascular prosthesis at its distal end.

Il s'agit soit d'une ombrelle de type MOBIN-UDDIN soit d'un filtre GREENFIELD ou apparenté.It is either a MOBIN-UDDIN type umbrella or a GREENFIELD or related filter.

Ces prothèses sont descendues dans la veine cave inférieure sous les veines rénales et larguées à cet endroit. Ces endo-prothèses ont pour rôle de filtrer le flux sanguin et de retenir les trombis éventuels, cause de récidives de la maladie#thrombo-embolique. Malheureusement dans un certain nombre de cas les filtres de type Greenfield peuvent être mal positionnés, trop bas, basculés, insertion dans une veine rénale, ou dans l'oreillette droite. Certaines de ces malpositions sont susceptibles d'entraîner un retentissement grave notamment lorsqu'il s'agit d'une insertion dans l'oreillette, ou dans la veine rénale. Il s'agit alors d'extraire ce filtre et jusqu'à présent seule la voie chirurgicale, sous anesthésie générale était possible. These prostheses are lowered into the inferior vena cava under the renal veins and released there. These endoprostheses have the role of filtering the blood flow and of retaining possible trombis, cause of recurrences of the disease # thromboembolism. Unfortunately in a number of cases Greenfield type filters can be incorrectly positioned, too low, tilted, insertion into a renal vein, or into the right atrium. Some of these malpositions are likely to cause a serious repercussion in particular when it is about an insertion in the auricle, or in the renal vein. It is then a question of extracting this filter and until now only the surgical way, under general anesthesia was possible.

Cette situation quoique rare pose de nombreux problèmes car l'intervention n'est pas toujours bien supportée par un patient déjà fragilisé. La description des différents éléments va faciliter la bonne compréhension.This situation, although rare, poses many problems because the intervention is not always well supported by an already weakened patient. The description of the different elements will facilitate good understanding.

La figure 1 est une vue de l'ensemble extracteur 1 en coupe dont la partie intérieure 2 sert de magasin pour le filtre de Greenfield 3. L'évasement ou cône 4 intérieur permet à la tête 5 du filtre de Greenfield 3 de rentrer facilement dans l'intérieur du magasin 2 tiré par le crochet 6 en forme d'hameçon se trouvant au bout de la tige 7 d'acier semi-rigide qui traverse l'extracteur 1 au point 8 et coulisse dans le tube cathéter 9. La forme extérieure de l'extracteur 1 se caractérise par sa terminaison distale en forme ovoïde 10, raccordée à la base du cône 4 intérieur par un arrondi 11. Le crochet 6 est légèrement ouvert et sa terminaison est arrondie 12 pour le rendre atraumatisante et faciliter l'accrochage de la calotte cônique 5 surmontant le filtre de Greenfield 3.Le tube cathéter 9 est fixé sur le mamelon 13 se trouvant à l'extrémité supérieure de l'extracteur 1 est maintenu à demeure par une virole 14 dont les angles extérieurs 15 sont arrondis.  Figure 1 is a view of the extractor assembly 1 in section, the inner part 2 serves as a store for the Greenfield filter 3. The flare or internal cone 4 allows the head 5 of the Greenfield filter 3 to easily enter the interior of the magazine 2 pulled by the hook 6 in the form of a hook located at the end of the rod 7 of semi-rigid steel which passes through the extractor 1 at point 8 and slides in the catheter tube 9. The external shape of the extractor 1 is characterized by its oval-shaped distal termination 10, connected to the base of the inner cone 4 by a rounded 11. The hook 6 is slightly open and its termination is rounded 12 to make it atraumatizing and facilitate attachment of the conical cap 5 surmounting the Greenfield filter 3. The catheter tube 9 is fixed to the nipple 13 located at the upper end of the extractor 1 is permanently fixed by a ferrule 14 whose external angles 15 are rounded.

La figure 2 représente l'autre extrémité#du tube cathéter 9 monté avec virole 14 sur un adaptateur 16 type Luer Lock avec dérivation latérale 17. La tige d'acier 7 le traverse et reçoit à son prolongement un système 1E de blocage diamétral par resserrement d'une pince cônique 19 serrée par un écrou 20 cônique moleté 21 qui assure par son diamètre extérieur une bonne préhension de l'opération - faisant déplacer la tige 7 dans l'ensemble. FIG. 2 represents the other end # of the catheter tube 9 mounted with a ferrule 14 on an adapter 16 of the Luer Lock type with lateral bypass 17. The steel rod 7 passes through it and receives, in its extension, a system 1E of diametric locking by tightening a conical pliers 19 tightened by a knurled conical nut 20 which ensures by its outside diameter a good grip of the operation - causing the rod 7 to move throughout.

La figure 3 représente l'extracteur dans la veine, le crochet sor et amarré à la calotte 5 du filtre 3. FIG. 3 represents the extractor in the vein, the hook sor and moored to the cap 5 of the filter 3.

La figure 4 représente schématiquement un moment de récupération l'opération de récupération du filtre 3. Un mouvement descendant de l'extra teur 1 que l'opérateur pousse par le tube cathéter 9 dans le sens de la fi che et un mouvement inverse de la tige 7 permet de décrocher les pointes du filtre 3 de la veine. En continuant la traction de la tige 7 et la descente de l'extracteur 1 on- réduit le diamètre du filtre 3 et on l'introduit inté gralement dans le magasin 2 de l'extracteur. FIG. 4 schematically represents a recovery moment the recovery operation of the filter 3. A downward movement of the extractor 1 which the operator pushes through the catheter tube 9 in the direction of the plug and a reverse movement of the rod 7 makes it possible to unhook the points of the filter 3 from the vein. By continuing to pull the rod 7 and lowering the extractor 1, the diameter of the filter 3 is reduced and it is introduced entirely into the magazine 2 of the extractor.

La présente invention a pour but de remédier à la malposition acc dentelle du filtre 3 de Greenfield dans la veine qui se présente sous forme d'une ombrelle évasée dont les fils très souples se terminent par des point pour s'accrocher à l'intérieur des veines. Ces fils sont groupés à un somme central par une petite calotte 5 conique. L'introduction dans la veine jugu laire interne droite d'un ensemble cathéter 9, muni à sa partie distale d'u extracteur 1 et à l'autre extrémité du cathéter 9 se trouve fixé un adaptateur 16 à voie latérale 17 genre Luer-Lock. Une fine tige centrale 7 d'acier traverse l'ensemble adaptateur 17, tube cathéter 9, extracteur 1, et se tel mine par un crochet 6 en forme d'hameçon.L'adaptateur 16 Luer-Lock, permet par la voie latérale l'injection de différents liquides qui circulant dans tube cathéter 7 arrive dans la veine au travers de l'extracteur 1. L'adaptE teur 17 ne permet pas au liquide injecté de s'échapper autrement que par 1' tracteur 1. The object of the present invention is to remedy the malposition acc lace of the Greenfield filter 3 in the vein which is in the form of a flared parasol, the very flexible threads of which end in dots to hang inside the veins. These wires are grouped at a central sum by a small conical cap 5. The introduction into the right internal jugu lar area of a catheter assembly 9, provided at its distal part with an extractor 1 and at the other end of the catheter 9 is fixed an adapter 16 to lateral channel 17 of the Luer-Lock type . A thin central rod 7 of steel passes through the adapter assembly 17, catheter tube 9, extractor 1, and is mine by a hook 6 in the form of a hook. The adapter 16 Luer-Lock, allows by the lateral route l injection of different liquids which circulates in catheter tube 7 arrives in the vein through the extractor 1. The adapter 17 does not allow the injected liquid to escape other than by the tractor 1.

L'extrémité opposée de la tige centrale 7 d'acier dépasse de l'at tateur 17 et reçoit un dispositif de verrouillage 18 à pinces 19 qui par si rage avec écrou moleté 21 devient solidaire de la toge 7. Par ses dimensior extérieures ce système de verrouillage permet à l'opérateur une bonne préh sion de la tige centrale de façon à la manoeuvrer, à diriger le crochet 6 la veine vers le filtre de Greenfield 3. L'ensemble tube cathéter 9 extrac 1 et adaptateur 16 Luer-Lock permet à l'opérateur de tirer, pousser ou tou: la tige centrale même si l'ensemble est courbé. The opposite end of the central steel rod 7 protrudes from the atomizer 17 and receives a locking device 18 with pliers 19 which by rage with knurled nut 21 becomes integral with the toga 7. By its external dimensions this system of locking allows the operator a good grip of the central rod so as to maneuver it, to direct the hook 6 the vein towards the Greenfield filter 3. The assembly catheter tube 9 extrac 1 and adapter 16 Luer-Lock allows the operator to pull, push or tou: the central rod even if the assembly is bent.

L'extracteur 1 a pour particularité à son intérieur de posséder un magasin 2 circulaire se terminant à sa partie distale par un cône 4 ou évasement ce qui permet à l'ombrelle ouverte formant le filtre 3 dans la veine d'y pouvoir pénétrer, en se rétreignant diamétralement. The extractor 1 has the peculiarity inside of having a circular magazine 2 ending at its distal part by a cone 4 or flare which allows the open umbrella forming the filter 3 in the vein to be able to penetrate therein. diametrically constricting.

La caractéristique principale de l'intervention réside de la manoeuvre de pénétration totale du filtre 3 dans le magasin par un premier mouvement d'amarrage de la calotte 5 du filtre par le crochet 6 sorti du magasin 2 dans un deuxième temps l'opérateur descend l'extracteur au-dessus du filtre 3 en malposition et le cône extérieur 4 vient par ce mouvement de descente, s'emboîter sur l'ombrelle du filtre 3, continuant de descendre la rampe 4 le restreint, son diamètre diminue progressivement et finalement le filtre 3 est rentré intégralement pointe entièrement masquée, dans le magasin de l'extrac- teur 1. The main characteristic of the intervention resides in the maneuver of total penetration of the filter 3 into the store by a first movement of mooring of the cap 5 of the filter by the hook 6 taken out of the store 2 in a second time the operator descends the extractor above the filter 3 in malposition and the outer cone 4 comes by this downward movement, fitting onto the umbrella of the filter 3, continuing to descend the ramp 4 restricts it, its diameter gradually decreases and finally the filter 3 is fully retracted with the tip completely hidden, in the magazine of extractor 1.

Par la suite deux manoeuvres sont réalisables :
A. Ablation de l'extracteur contenant le filtre par les méthodes traditionnelles.Thereafter two maneuvers are possible:
A. Removal of the extractor containing the filter by traditional methods.

B. Soit grâce à l'extracteur repositionner le filtre et largage au bon endroit. B. Either with the extractor reposition the filter and release it in the right place.

La partie distale externe de l'extracteur possède une forme ovoïde qui facilite l'introduction dans la veine jugulaire et qui est raccordée avec le cône 4 intérieur par un arrondi 11.  The external distal part of the extractor has an ovoid shape which facilitates introduction into the jugular vein and which is connected with the internal cone 4 by a rounded 11.

Claims (1)

REVENDICATIONS 1. Dispositif genre catéther pour extraire et repositionner les filtres 3 genre Greenfield ou apparenté en malposition par voie veineuses 1. Catether-like device for extracting and repositioning filters 3 like Greenfield or related in malposition by venous route caractérisé par-le fait qutu tige d'acier 7 inox semi-rigide terminée par un crochet 6, guidée par un tu cathéter 9 et traversant verticalement l'extracteur 1 peut amarrer un filtr 3 type Greenfield en malposition par la calotte centrale 5. characterized by the fact that a semi-rigid stainless steel rod 7 terminated by a hook 6, guided by a catheter tu and passing vertically through the extractor 1 can moor a Greenfield type filter 3 malposed by the central cap 5. Dispositif selon revendication 1 z caractérisé par le fai que l'extracteur 1 solidaire du tube cathéter 9 peut descendre indépendamme de la tige centrale 7 et coiffer la calotte 5 du filtre 3 maintenue en plac par le crochet 6. Le mouvement relatif entre le crochet et l'extracteur 1 permet à celui-ci de décrocher de la paroi veineuse, les pointes du filtre, et continuant le mouvement de restreindre le filtre et de l'introduire inté gralement dans le magasin 2 de l'extracteur 1. Device according to claim 1 z characterized in that the extractor 1 integral with the catheter tube 9 can descend independently of the central rod 7 and cover the cap 5 of the filter 3 held in place by the hook 6. The relative movement between the hook and the extractor 1 allows the latter to unhook the tips of the filter from the venous wall, and continuing the movement to restrict the filter and introduce it integrally into the magazine 2 of the extractor 1. 3, Dispositif selon revendication 1) caractérisé par le fait qu'i est possible de repositionner le filtre 3 sans avoir à l'extraire de la vei par manoeuvre inverse. 3, Device according to claim 1) characterized in that it is possible to reposition the filter 3 without having to extract it from the vei by reverse operation. 4. Dispositif selon revendication 1,caractérisé par le fait que partie externe distale de l'extracteur possède une forme ovoïde qui facilit l'introduction dans la veine jugulaire.  4. Device according to claim 1, characterized in that the distal external part of the extractor has an ovoid shape which facilitates introduction into the jugular vein.
FR8708709A 1987-06-22 1987-06-22 Device of the catheter type for extracting and repositioning filters of the Greenfield or similar type which are wrongly positioned, through the vein Withdrawn FR2616666A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8708709A FR2616666A1 (en) 1987-06-22 1987-06-22 Device of the catheter type for extracting and repositioning filters of the Greenfield or similar type which are wrongly positioned, through the vein

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8708709A FR2616666A1 (en) 1987-06-22 1987-06-22 Device of the catheter type for extracting and repositioning filters of the Greenfield or similar type which are wrongly positioned, through the vein

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950224A (en) * 1988-08-05 1990-08-21 Healthdyne, Inc. Apparatus and method for in vivo plasma separation
WO1991004716A1 (en) * 1989-10-09 1991-04-18 Fondation De L'avenir Pour La Recherche Medicale Appliquee Anti-pulmonary embolism filter and kit for storing and applying such filter
EP0484468A1 (en) 1990-03-13 1992-05-13 The Regents Of The University Of California Endovascular electrolytically detachable guidewire tip
FR2673830A1 (en) * 1991-03-14 1992-09-18 Ethnor Improved filter for protecting against pulmonary embolisms, and corresponding kit for presentation and positioning
WO1992016163A1 (en) * 1991-03-14 1992-10-01 Ethnor Improved pulmonary embolism prevention filter and associated positioning and fitting kit
US5152743A (en) * 1988-08-05 1992-10-06 Healthdyne, Inc. Apparatus and method for selective separation of blood cholesterol
US5242382A (en) * 1988-08-05 1993-09-07 Healthdyne, Inc. Apparatus and method for direct measurement of blood parameters
FR2696636A1 (en) * 1992-10-13 1994-04-15 Balt Sa Temporary wire-based blocking system for blood vessel etc. - uses coiled tubular tungsten@ wire to promote localised clotting, with hollow catheter for introduction of wire to required location
EP0616543A1 (en) 1991-12-12 1994-09-28 Target Therapeutics, Inc. Detachable pusher-vasoocclusive coil assembly with interlocking ball and keyway coupling
EP0629125A1 (en) 1992-02-24 1994-12-21 Regents Of The University Of California Microcatheter system
US5531788A (en) * 1989-10-09 1996-07-02 Foundation Pour L'avenir Pour La Recherche Medicale Appliquee Anti-Pulmonary embolism filter
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
EP0937439A2 (en) * 1991-07-16 1999-08-25 Heartport, Inc. Endovascular aortic valve replacement device
EP0948932A1 (en) * 1998-04-06 1999-10-13 Nissho Corporation Device for retrieval of defect closure devices
WO2001012082A1 (en) * 1999-08-12 2001-02-22 Salviac Limited Retrieval device
US6432122B1 (en) 1997-11-07 2002-08-13 Salviac Limited Embolic protection device
US6565591B2 (en) 2000-06-23 2003-05-20 Salviac Limited Medical device
US6726701B2 (en) 1999-05-07 2004-04-27 Salviac Limited Embolic protection device
US6752819B1 (en) 1998-04-02 2004-06-22 Salviac Limited Delivery catheter
US6887256B2 (en) 1997-11-07 2005-05-03 Salviac Limited Embolic protection system
EP1832250A1 (en) * 2006-03-11 2007-09-12 Dr. Karel Volenec - ELLA - CS Stent extractor
JP2009034246A (en) * 2007-07-31 2009-02-19 Filmec Kk Medical treatment instrument for recovering filter
US7799051B2 (en) 1999-05-07 2010-09-21 Salviac Limited Support frame for an embolic protection device
US7819893B2 (en) 2000-06-23 2010-10-26 Salviac Limited Medical device
US7854746B2 (en) 2003-10-13 2010-12-21 C. R. Bard, Inc. Retrieval catheter
US7901427B2 (en) 1997-11-07 2011-03-08 Salviac Limited Filter element with retractable guidewire tip
US7927349B2 (en) 2001-12-21 2011-04-19 Salviac Limited Support frame for an embolic protection device
US8002790B2 (en) 1999-05-07 2011-08-23 Salviac Limited Support frame for an embolic protection device
US8177790B2 (en) * 2002-04-20 2012-05-15 Friedhelm Brassel Medical retriever

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950224A (en) * 1988-08-05 1990-08-21 Healthdyne, Inc. Apparatus and method for in vivo plasma separation
US5152743A (en) * 1988-08-05 1992-10-06 Healthdyne, Inc. Apparatus and method for selective separation of blood cholesterol
US5242382A (en) * 1988-08-05 1993-09-07 Healthdyne, Inc. Apparatus and method for direct measurement of blood parameters
US5531788A (en) * 1989-10-09 1996-07-02 Foundation Pour L'avenir Pour La Recherche Medicale Appliquee Anti-Pulmonary embolism filter
WO1991004716A1 (en) * 1989-10-09 1991-04-18 Fondation De L'avenir Pour La Recherche Medicale Appliquee Anti-pulmonary embolism filter and kit for storing and applying such filter
FR2655839A2 (en) * 1989-10-09 1991-06-21 Fondation Avenir Rech Medical ANTI-EMBOLISED PULMONARY FILTER AND ITS PRESENTATION AND FITTING KIT.
EP0484468A1 (en) 1990-03-13 1992-05-13 The Regents Of The University Of California Endovascular electrolytically detachable guidewire tip
EP0484468B1 (en) * 1990-03-13 1999-06-16 The Regents Of The University Of California Endovascular electrolytically detachable guidewire tip
FR2673830A1 (en) * 1991-03-14 1992-09-18 Ethnor Improved filter for protecting against pulmonary embolisms, and corresponding kit for presentation and positioning
US5413586A (en) * 1991-03-14 1995-05-09 Ethnor Anti-pulmonary embolism filter and corresponding presentation and fitting kit
WO1992016163A1 (en) * 1991-03-14 1992-10-01 Ethnor Improved pulmonary embolism prevention filter and associated positioning and fitting kit
EP0937439A2 (en) * 1991-07-16 1999-08-25 Heartport, Inc. Endovascular aortic valve replacement device
US8915959B2 (en) 1991-07-16 2014-12-23 Heartport, Inc. Endovascular aortic valve replacement
EP0937439A3 (en) * 1991-07-16 1999-10-13 Heartport, Inc. Endovascular aortic valve replacement device
EP0616543A1 (en) 1991-12-12 1994-09-28 Target Therapeutics, Inc. Detachable pusher-vasoocclusive coil assembly with interlocking ball and keyway coupling
EP0629125A1 (en) 1992-02-24 1994-12-21 Regents Of The University Of California Microcatheter system
EP0629125B1 (en) * 1992-02-24 1998-06-24 Regents Of The University Of California Microcatheter system
FR2696636A1 (en) * 1992-10-13 1994-04-15 Balt Sa Temporary wire-based blocking system for blood vessel etc. - uses coiled tubular tungsten@ wire to promote localised clotting, with hollow catheter for introduction of wire to required location
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
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