FR2530958A1 - Cylindrical catheter with one or several channels - Google Patents
Cylindrical catheter with one or several channels Download PDFInfo
- 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.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M2025/0037—Multi-lumen catheters with stationary elements characterized by lumina being arranged side-by-side
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0009—Making of catheters or other medical or surgical tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0108—Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers
Landscapes
- 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
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)
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 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8213236A FR2530958A1 (en) | 1982-07-29 | 1982-07-29 | Cylindrical catheter with one or several channels |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2530958A1 true FR2530958A1 (en) | 1984-02-03 |
Family
ID=9276441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8213236A Withdrawn FR2530958A1 (en) | 1982-07-29 | 1982-07-29 | Cylindrical catheter with one or several channels |
Country Status (1)
Country | Link |
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FR (1) | FR2530958A1 (en) |
Cited By (22)
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)
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 |
-
1982
- 1982-07-29 FR FR8213236A patent/FR2530958A1/en not_active Withdrawn
Patent Citations (8)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Withdrawal of published application |