FR2530958A1 - Cylindrical catheter with one or several channels - Google Patents

Cylindrical catheter with one or several channels Download PDF

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Publication number
FR2530958A1
FR2530958A1 FR8213236A FR8213236A FR2530958A1 FR 2530958 A1 FR2530958 A1 FR 2530958A1 FR 8213236 A FR8213236 A FR 8213236A FR 8213236 A FR8213236 A FR 8213236A FR 2530958 A1 FR2530958 A1 FR 2530958A1
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FR
France
Prior art keywords
wall
catheter
channels
cylindrical
catheter according
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.)
Withdrawn
Application number
FR8213236A
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French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LACOUR GAYET FRANCOIS
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LACOUR GAYET FRANCOIS
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Publication date
Application filed by LACOUR GAYET FRANCOIS filed Critical LACOUR GAYET FRANCOIS
Priority to FR8213236A priority Critical patent/FR2530958A1/en
Publication of FR2530958A1 publication Critical patent/FR2530958A1/en
Withdrawn legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0043Catheters; Hollow probes characterised by structural features
    • A61M25/0045Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0021Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026Multi-lumen catheters with stationary elements
    • A61M2025/0037Multi-lumen catheters with stationary elements characterized by lumina being arranged side-by-side
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0009Making of catheters or other medical or surgical tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0108Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

Such a catheter is constituted of two materials which are associated by simultaneous extrusion, the one having the greatest flexibility forming the wall or outer envelope 1 of the catheter in contact with the vascular wall, and the other, having a predetermined stiffness forming the core or internal wall 2 of the catheter and allowing correct progression thereof.

Description

La présente invention concerne un catheter cylindrique a un ou plusieurs canaux et, en particulier, un cathéter a âme rigide et enveloppe souple, obtenu notamment par extrusion. The present invention relates to a cylindrical catheter with one or more channels and, in particular, a catheter with rigid core and flexible envelope, obtained in particular by extrusion.

Actuellement, les cathéters constituent un matériel médical utilisé de manière très courante en réanimation et en chirurgie. En effet, ces cathéters sont indispensables, d'une part, pour mesurer des pressions intra-cardiaques et, d'autre part, pour apporter directement dans la cir culation centrale des produits de remplissage ainsi que des drogues de très haute activité pharmacologi.que.  Currently, catheters are medical equipment used very commonly in resuscitation and surgery. In fact, these catheters are essential, on the one hand, for measuring intra-cardiac pressures and, on the other hand, for directly supplying filling products as well as drugs with very high pharmacological activity into the central circulation. .

Dans la technique médicale, il est reconnu qu'un cathéter, pour entre de bonne-qualité, doit répondre a deux impératifs contradictoi res. D'une parts il doit posséder une certaine rigidité pour permettre son introduction aisée et son parcours suivant un trajet sinueux, sans possi bilite d'un pliage accidentel et, d'autre parts avoir une souplesse maximum permettant d'éviter tout risque de perforation des veines et/ou des cavités cardiaques. In medical technology, it is recognized that a catheter, in order to be of good quality, must meet two contradictory imperatives. On the one hand it must have a certain rigidity to allow its easy introduction and its course following a winding path, without the possibility of accidental folding and, on the other hand, have maximum flexibility making it possible to avoid any risk of perforation of the veins and / or heart chambers.

D'autre part, dans les techniques modernes de réanimation, il est nécessaire d'utiliser simultanément plusieurs cathéters, soit pour perfuser des liquides différents, soit pour perfuser et réaliser des mesures de pressions diverses, soit de plus, pour perfuser des drogues dif ferventes, ayant de très hautes activités pha#macologiques, qui nécessitent un débit parfaitement constant
Les cathéters actuels ai simple canal évoluent vers le maximum de souplesse sans toutefois parvenir a la souplesse maximale idéal.e, du fait qu'une certaine raideur étant nécessaire pour obtenir une bonne progression du cathéter a travers les veines, il s'ensuit obligatoirement une certaine limite dans la souplesse de ce dernier. Nêanmoins,-on connais des cathéters a âme -rigide ou semi-rigide rétractable après introduction et trajet du cathéter. Cependant, ces cathéters, bien que fournissant une bonne rigidité alliée à une certaine souplesse, ne sont pas d'une sûreté efficace car il arrive très souvent que l'ame rétractable ne peut pas être retirée après l'introduction du cathéter ou, encore, casse a l'intérieur de celui-ci lors de sa rétraction.
On the other hand, in modern resuscitation techniques, it is necessary to use several catheters simultaneously, either to infuse different liquids, or to infuse and perform various pressure measurements, or moreover, to infuse different fervent drugs , having very high pha # macological activities, which require a perfectly constant flow
Current single-channel catheters move towards maximum flexibility without, however, achieving the ideal maximum flexibility. Because a certain stiffness is necessary to obtain good progression of the catheter through the veins, it necessarily follows some limit in the flexibility of the latter. Nevertheless, we know catheters with a rigid or semi-rigid retractable core after introduction and path of the catheter. However, these catheters, although providing good rigidity combined with a certain flexibility, are not of an effective safety because it very often happens that the retractable core cannot be withdrawn after the introduction of the catheter or, breaks inside of it during its retraction.

Par ailleurs, la mise en place de plusieurs cathéters conduit a prendre-des risques supplémentaires, tels que la multiplicite des points de piqure, les risques d'infection et le temps de manoeuvre prolongé retardant l'acte opératoire souvent très urgent. Devant ces difficultés, les médecins sont souvent obligés de se contenter d'une intervention avec un seul cathéter et de demander a celui-ci de remplir plusieurs fonctions : en particulier perfuser différentes drogues dont l'association n'est pas souhaitable, effectuer simultanément des mesures de pression et perfuser des drogues, aboutissant à des fluctuations de débit parfois dangereuses, de substances de très haute activité pharmacologique. In addition, the installation of several catheters leads to taking additional risks, such as the multiplicity of puncture points, the risks of infection and the prolonged maneuver time delaying the often very urgent surgical procedure. Faced with these difficulties, doctors are often obliged to settle for an intervention with a single catheter and to ask it to fulfill several functions: in particular to infuse different drugs whose combination is not desirable, to perform simultaneous pressure measurements and infusion of drugs, leading to sometimes dangerous flow fluctuations, of substances of very high pharmacological activity.

En conséquence, profitant de leur expérience dans la chirurgie, la réanimation et dans les techniques d'extrusion, les inventeurs ont conçu et réalisé de nouveaux cathéters extrudés à un ou plusieurs canaux, éliminant la majeure partie des inconvénients présentés par les ca théters connus actuellement et constitués de deux matières associées par extrusion simultanée, l'une ayant une souplesse maximum formant la paroi ou enveloppe externe du cathéter en contact avec la paroi vasculaire, et l'autre, une rigidité déterminée formant l'âme ou paroi interne de ce catéter et permettant sa bonne progression. Consequently, taking advantage of their experience in surgery, resuscitation and in extrusion techniques, the inventors have designed and produced new extruded catheters with one or more channels, eliminating most of the drawbacks presented by the currently known catheters. and consisting of two materials associated by simultaneous extrusion, one having maximum flexibility forming the wall or external envelope of the catheter in contact with the vascular wall, and the other, a determined rigidity forming the core or internal wall of this cateter and allowing its good progress.

Selon l1invention, ce cathéter à un ou plusieurs canaux peut avoir dans le cas où il est à simple canal, ses parois interne et externe sous forme de parois cylindriques et concentriques. According to the invention, this catheter with one or more channels can have, if it is a single channel, its internal and external walls in the form of cylindrical and concentric walls.

Par contre, dans-le cas où il est, par exemple, à deux ca naux, sa paroi interne de rigidité déterminée est sous forme d'une cloison diamétrale séparant en deuil parties seiu7-circulaires sa paroi externe, souple et de selon sensiblement cylindrique. On the other hand, in the case where it is, for example, with two channels, its internal wall of determined rigidity is in the form of a diametrical partition separating in mourning seiu7-circular parts its external wall, flexible and of substantially cylindrical .

Dans le cas d'un cathéter à plus de deux canaux, la paroi interne est constituée par plusieurs cloisons radiales divisant la section cylindrique de la paroi externe en canaux dont le nombre est égal à celui des cloisons. In the case of a catheter with more than two channels, the internal wall is formed by several radial partitions dividing the cylindrical section of the external wall into channels, the number of which is equal to that of the partitions.

Q noter que la matière constituant la paroi externe peut être transparente ou translucide pour permettre la possibilité de visualiser les substances canalisées. De même, la matière constituant la paroi interne peut être pigmentée de façon à être radio opaque et permettre la visualisation radiologique du cathéter
D'autres caractéristiques de l'invention apparaitront de la description suivante de modes de réalisation de cathéters, donnés à titre d'exemples non limitatifs et représentés dans les dessins ci joints3 dans lesquels
- la figure 1 est une vue en coupe schématique sur un cathéter à sim ple canal, conforme à l'invention,
- la figure 2 est une vue en coupe schématique sur un autre cathéter à deux canaux, conforme à l'invention.
Q note that the material constituting the external wall can be transparent or translucent to allow the possibility of viewing the channeled substances. Similarly, the material constituting the internal wall can be pigmented so as to be radiopaque and allow radiological visualization of the catheter.
Other characteristics of the invention will appear from the following description of embodiments of catheters, given by way of nonlimiting examples and represented in the attached drawings3 in which
FIG. 1 is a diagrammatic section view on a single-channel catheter according to the invention,
- Figure 2 is a schematic sectional view on another two-channel catheter, according to the invention.

Cpnme on le remarque dans la figure 1, le caeéter à simple canal représenté est formé de deux parois concentriques, la paroi externe 1 étant constituée en matière souple adaptée pour pouvoir être en contact avec la paroi vasculaire, et la paroi interne 2 étant en matière de rigidité déterminée adaptée pour permettre une bonne progression du cathéter. As can be seen in FIG. 1, the single-channel caeeter shown is formed by two concentric walls, the external wall 1 being made of flexible material adapted to be able to be in contact with the vascular wall, and the internal wall 2 being made of material of determined rigidity adapted to allow good progression of the catheter.

Dans la figure 2, le catheter represente à deux canaux comporte, comme celui de la figure 1, une paroi externe 3 constituée en ma tière souple, mais sa paroi interne 4 en matière de rigidité déterminée est sous forme d'une cloison diamétrale séparant en deux parties semicirculaires la paroi externe 3, de section sensiblement cylindrique.  In FIG. 2, the catheter represented by two channels comprises, like that of FIG. 1, an external wall 3 made of flexible material, but its internal wall 4 in terms of determined rigidity is in the form of a diametrical partition separating in two semicircular parts the outer wall 3, of substantially cylindrical section.

Claims (6)

REVENDICATIONS 1.- Cathéter cylindrique un ou plusieurs canaux, caractérisé par le fait qu'il est constitué de deux matières associées par extrusion simultanée, l'une ayant une souplesse maximum formant la paroi ou enveloppe externe (1,3) du cathéter en contact avec la paroi vasculaire, et l'autre, une rigidité déterminée formant l'âme ou paroi interne (2,4) de ce cathéter et permettant sa bonne progression. 1.- Cylindrical catheter with one or more channels, characterized in that it consists of two materials associated by simultaneous extrusion, one having maximum flexibility forming the outer wall or envelope (1,3) of the catheter in contact with the vascular wall, and the other, a determined rigidity forming the core or internal wall (2,4) of this catheter and allowing its good progression. 2.- Cathéter selon la revendication 1, comportant un simple canal, caractérisé par le fait que ses parois interne=(2) et externe (1) sont sous forme de parois cylindriques et concentriques. 2. A catheter according to claim 1, comprising a single channel, characterized in that its internal = (2) and external (1) walls are in the form of cylindrical and concentric walls. 3.- Cathéter selon la revendication 1, comportant deux canaux, caractérisé par le fait que sa paroi interne (4) de rigidité déterminée est sous forme d'une cloison diamétrale séparant en deux parties semicirculaires sa paroi externe (3) souple et de section sensiblement cylindrique. 3.- catheter according to claim 1, comprising two channels, characterized in that its internal wall (4) of determined rigidity is in the form of a diametrical wall separating into two semicircular parts its external wall (3) flexible and of section substantially cylindrical. 4.- Cathéter selon a revendication 1, comportant plus de deux canaux, caractérisé par le fait que sa paroi interne est constituée par plusieurs cloisons radiales divisant la section cylindrique de sa paroi externe en canaux dont le nombre est égal a celui des cloisons. 4. A catheter according to claim 1, comprising more than two channels, characterized in that its internal wall is constituted by several radial partitions dividing the cylindrical section of its external wall into channels, the number of which is equal to that of the partitions. 5.- Cathéter selon l'une quelconque des revendications 1 a 4, caractérisé par le fait que la matière constituant sa paroi externe est transparente ou translucide. 5.- catheter according to any one of claims 1 to 4, characterized in that the material constituting its outer wall is transparent or translucent. 6.- Cathéter selon l'une quelconque des revendications 1 a 5, caractérisé par le fait que la matière constituant sa paroi interne est pigmentée pour la rendre r#dio-opaque.  6.- Catheter according to any one of claims 1 to 5, characterized in that the material constituting its internal wall is pigmented to make it r # dio-opaque.
FR8213236A 1982-07-29 1982-07-29 Cylindrical catheter with one or several channels Withdrawn FR2530958A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8213236A FR2530958A1 (en) 1982-07-29 1982-07-29 Cylindrical catheter with one or several channels

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FR8213236A FR2530958A1 (en) 1982-07-29 1982-07-29 Cylindrical catheter with one or several channels

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333308A2 (en) * 1988-03-17 1989-09-20 Vas-Cath Incorporated Dual lumen catheter
US5009636A (en) * 1989-12-06 1991-04-23 The Kendall Company Dual-lumen catheter apparatus and method
EP0436705A1 (en) * 1989-07-07 1991-07-17 C.R. Bard, Inc. High-friction prostatic stent
EP0440992A2 (en) * 1990-01-10 1991-08-14 Sakharam Dhundiraj Mahurkar Reinforced multiple-lumen catheter
EP0600860A4 (en) * 1990-02-23 1993-01-07 New England Deaconess Hospital Apparatus and method for central venous catheterization.
US5221255A (en) 1990-01-10 1993-06-22 Mahurkar Sakharam D Reinforced multiple lumen catheter
FR2701214A1 (en) * 1993-02-08 1994-08-12 Nippon Zeon Co Catheter and method of manufacture thereof
US5348536A (en) * 1993-08-02 1994-09-20 Quinton Instrument Company Coextruded catheter and method of forming
US5374245A (en) 1990-01-10 1994-12-20 Mahurkar; Sakharam D. Reinforced multiple-lumen catheter and apparatus and method for making the same
NL9301181A (en) * 1993-07-05 1995-02-01 Cordis Europ A method of manufacturing a catheter with at least one high pressure lumen and catheter.
EP0669142A2 (en) * 1994-01-31 1995-08-30 Cordis Corporation Catheter having coextruded tubing
US5489278A (en) * 1993-08-02 1996-02-06 Quinton Instrument Company Catheter with elongated side openings
US5797869A (en) 1987-12-22 1998-08-25 Vas-Cath Incorporated Multiple lumen catheter
US5830196A (en) * 1995-09-21 1998-11-03 Tyco Group S.A.R.L. Tapered and reinforced catheter
US6595966B2 (en) 1998-02-24 2003-07-22 Scimed Life Systems, Inc. High flow rate dialysis catheters and related methods
US6620202B2 (en) 2001-10-16 2003-09-16 Scimed Life Systems, Inc. Medical stent with variable coil and related methods
US6656146B1 (en) 1995-11-07 2003-12-02 Scimed Life Systems, Inc. Medical device with tail(s)
US6719804B2 (en) 2001-04-02 2004-04-13 Scimed Life Systems, Inc. Medical stent and related methods
WO2006037608A1 (en) * 2004-10-01 2006-04-13 Covidien Ag Catheter
WO2008020241A3 (en) * 2006-08-18 2009-08-13 Renishaw Plc Neurosurgical instruments
US7678154B2 (en) 1995-11-07 2010-03-16 Boston Scientific Scimed, Inc. Ureteral stent for improved patient comfort
US10751513B2 (en) 2012-07-24 2020-08-25 Renishaw Plc Neurosurgical apparatus and methods

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR998034A (en) * 1949-08-15 1952-01-14 Ruesch Fa Balloon catheter and method of manufacture
FR1052629A (en) * 1951-09-25 1954-01-26 Dual current probe and method for its manufacture
DE1061484B (en) * 1955-01-11 1959-07-16 Willy Ruesch Injection device for the production of multiple cardiac catheters
FR2188448A7 (en) * 1972-06-07 1974-01-18 Warne Et Cy Ltd William Composite walled surgical/medical tubing - for wound drainage catheters etc with one layer of hard matrial in wall
DE2622502A1 (en) * 1976-05-20 1977-11-24 Rehau Plastiks Polyvinyl chloride test tubes, e.g. for dialysis - which are coated internally with a transparent, plasticiser-free layer of thermoplastic (NL 22.11.77)
FR2371933A1 (en) * 1976-11-26 1978-06-23 Kendall & Co DEVELOPMENT FOR CATHETERS
FR2419077A1 (en) * 1978-03-07 1979-10-05 Dow Corning Kk PERFECTED SYSTEM FOR SETTING UP A CATHETER
US4211741A (en) * 1977-04-07 1980-07-08 Sunlite Plastics, Inc. Extrusion process for laminated medical-surgical tubing

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR998034A (en) * 1949-08-15 1952-01-14 Ruesch Fa Balloon catheter and method of manufacture
FR1052629A (en) * 1951-09-25 1954-01-26 Dual current probe and method for its manufacture
DE1061484B (en) * 1955-01-11 1959-07-16 Willy Ruesch Injection device for the production of multiple cardiac catheters
FR2188448A7 (en) * 1972-06-07 1974-01-18 Warne Et Cy Ltd William Composite walled surgical/medical tubing - for wound drainage catheters etc with one layer of hard matrial in wall
DE2622502A1 (en) * 1976-05-20 1977-11-24 Rehau Plastiks Polyvinyl chloride test tubes, e.g. for dialysis - which are coated internally with a transparent, plasticiser-free layer of thermoplastic (NL 22.11.77)
FR2371933A1 (en) * 1976-11-26 1978-06-23 Kendall & Co DEVELOPMENT FOR CATHETERS
US4211741A (en) * 1977-04-07 1980-07-08 Sunlite Plastics, Inc. Extrusion process for laminated medical-surgical tubing
FR2419077A1 (en) * 1978-03-07 1979-10-05 Dow Corning Kk PERFECTED SYSTEM FOR SETTING UP A CATHETER

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6206849B1 (en) 1987-12-22 2001-03-27 Vas-Cath Incorporated Multiple lumen catheter
US5797869A (en) 1987-12-22 1998-08-25 Vas-Cath Incorporated Multiple lumen catheter
EP0333308A3 (en) * 1988-03-17 1991-04-24 Vas-Cath Incorporated Dual lumen catheter
EP0333308A2 (en) * 1988-03-17 1989-09-20 Vas-Cath Incorporated Dual lumen catheter
EP0436705A1 (en) * 1989-07-07 1991-07-17 C.R. Bard, Inc. High-friction prostatic stent
EP0436705A4 (en) * 1989-07-07 1992-03-25 C.R. Bard, Inc. High-friction prostatic stent
US5009636A (en) * 1989-12-06 1991-04-23 The Kendall Company Dual-lumen catheter apparatus and method
EP0440992A3 (en) * 1990-01-10 1992-01-02 Sakharam Dhundiraj Mahurkar Reinforced multiple-lumen catheter
US5221255A (en) 1990-01-10 1993-06-22 Mahurkar Sakharam D Reinforced multiple lumen catheter
US5374245A (en) 1990-01-10 1994-12-20 Mahurkar; Sakharam D. Reinforced multiple-lumen catheter and apparatus and method for making the same
EP0440992A2 (en) * 1990-01-10 1991-08-14 Sakharam Dhundiraj Mahurkar Reinforced multiple-lumen catheter
EP0600860A1 (en) * 1990-02-23 1994-06-15 New England Deaconess Hospital Corporation Apparatus and method for central venous catheterization
EP0600860A4 (en) * 1990-02-23 1993-01-07 New England Deaconess Hospital Apparatus and method for central venous catheterization.
FR2701214A1 (en) * 1993-02-08 1994-08-12 Nippon Zeon Co Catheter and method of manufacture thereof
NL9301181A (en) * 1993-07-05 1995-02-01 Cordis Europ A method of manufacturing a catheter with at least one high pressure lumen and catheter.
EP0637453A1 (en) * 1993-07-05 1995-02-08 Cordis Europa N.V. Method for manufacturing a catheter with at least one high-pressure lumen and catheter
US5713851A (en) * 1993-07-05 1998-02-03 Cordis Corporation Method for manufacturing a catheter with at least one high-pressure lumen
US5348536A (en) * 1993-08-02 1994-09-20 Quinton Instrument Company Coextruded catheter and method of forming
US5451206A (en) * 1993-08-02 1995-09-19 Quinton Instrument Company Triple lumen catheter
US5489278A (en) * 1993-08-02 1996-02-06 Quinton Instrument Company Catheter with elongated side openings
EP0669142A3 (en) * 1994-01-31 1996-02-07 Cordis Corp Catheter having coextruded tubing.
EP0669142A2 (en) * 1994-01-31 1995-08-30 Cordis Corporation Catheter having coextruded tubing
US5830196A (en) * 1995-09-21 1998-11-03 Tyco Group S.A.R.L. Tapered and reinforced catheter
US7678154B2 (en) 1995-11-07 2010-03-16 Boston Scientific Scimed, Inc. Ureteral stent for improved patient comfort
US6656146B1 (en) 1995-11-07 2003-12-02 Scimed Life Systems, Inc. Medical device with tail(s)
US8845752B2 (en) 1995-11-07 2014-09-30 Boston Scientific Scimed, Inc. Ureteral stent for improved patient comfort
US6595966B2 (en) 1998-02-24 2003-07-22 Scimed Life Systems, Inc. High flow rate dialysis catheters and related methods
US7951206B2 (en) 2001-04-02 2011-05-31 Boston Scientific Scimed, Inc. Medical stent
US6719804B2 (en) 2001-04-02 2004-04-13 Scimed Life Systems, Inc. Medical stent and related methods
US6620202B2 (en) 2001-10-16 2003-09-16 Scimed Life Systems, Inc. Medical stent with variable coil and related methods
WO2006037608A1 (en) * 2004-10-01 2006-04-13 Covidien Ag Catheter
AU2005291400B2 (en) * 2004-10-01 2011-03-10 Covidien Ag Catheter
US8523842B2 (en) 2004-10-01 2013-09-03 Covidien Ag Dual-lumen catheter with contrastradiography sections to identify the lumens
US9314592B2 (en) 2004-10-01 2016-04-19 Covidien Ag Dual lumen catheter with contrastradiography sections to identify the lumens
WO2008020241A3 (en) * 2006-08-18 2009-08-13 Renishaw Plc Neurosurgical instruments
US9452241B2 (en) 2006-08-18 2016-09-27 Renishaw (Ireland) Limited Neurosurgical instruments
US10857327B2 (en) 2006-08-18 2020-12-08 Renishaw Plc Neurosurgical instruments
US10751513B2 (en) 2012-07-24 2020-08-25 Renishaw Plc Neurosurgical apparatus and methods

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