FR2571621A3 - X-ray opaque (radiopaque) catheter tube and its method of manufacture - Google Patents
X-ray opaque (radiopaque) catheter tube and its method of manufacture Download PDFInfo
- Publication number
- FR2571621A3 FR2571621A3 FR8409181A FR8409181A FR2571621A3 FR 2571621 A3 FR2571621 A3 FR 2571621A3 FR 8409181 A FR8409181 A FR 8409181A FR 8409181 A FR8409181 A FR 8409181A FR 2571621 A3 FR2571621 A3 FR 2571621A3
- Authority
- FR
- France
- Prior art keywords
- tungsten
- thermoplastic
- catheter
- ray opaque
- mixture
- 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- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/14—Materials characterised by their function or physical properties, e.g. lubricating compositions
- A61L29/18—Materials at least partially X-ray or laser opaque
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/02—Inorganic materials
-
- 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
Abstract
Description
L'invention concerne un tube cathéter opaque aux rayons X et son procédé de fabrication. The invention relates to an X-ray opaque catheter tube and its manufacturing method.
Les cathéters sont généralement fabriqués par extrusion à partir de thermoplastiques chargés d'un matériau opaque aux rayons
X de manière à permettre de les suivre en radioscopie.Catheters are generally manufactured by extrusion from thermoplastics loaded with a material opaque to the rays
X so that they can be followed by fluoroscopy.
Les thermoplastiques généralement utilisés -sont les résines fluorocarbonées, résines polyacétates, polyamides, polyéthy lènes, ABS, PVC. The thermoplastics generally used -are fluorocarbon resins, polyacetate resins, polyamides, polyethylenes, ABS, PVC.
Pour opacifier ces thermoplastiques, il est connu d'utiliser des sels ou des oxydes de bismuth ou de baryum qui sont faciles à microniser et à mélanger avec les matières thermoplastiques. To opacify these thermoplastics, it is known to use salts or oxides of bismuth or barium which are easy to micronize and to mix with the thermoplastic materials.
La proportion de ces produits est d'environ 110% du mélange total, ce qui a tendance à rendre cassants les produits finis. The proportion of these products is around 110% of the total mixture, which tends to make the finished products brittle.
Si on utilise couramment des sels de bismuth, il est impossible d'utiliser du bismuth pur, car celui-ci se dégrade facilement aux températures d'extrusion. Les oxydes dégagent en outre des gaz pendant la transformation, notamment avec les résines fluorocarbonées, ce qui provoque une porosité du produit fini. If bismuth salts are commonly used, it is impossible to use pure bismuth because it easily degrades at extrusion temperatures. The oxides also give off gases during processing, in particular with fluorocarbon resins, which causes porosity of the finished product.
Les cathéters doivent de plus présenter des surfaces intérieure et extérieure parfaitement lisses pour éviter notamment des coagulations étant donné les diamètres très réduits de la plupart des cathéters. The catheters must moreover have perfectly smooth interior and exterior surfaces in order to avoid in particular coagulations given the very small diameters of most catheters.
Il est très difficile de trouver la matière idéale qui présente une bonne tolérance (non toxique), qui permet d'obtenir des surfaces parfaitement lisses et qui soit mélangeable facilement. It is very difficult to find the ideal material which has good tolerance (non-toxic), which makes it possible to obtain perfectly smooth surfaces and which can be easily mixed.
L'inventeur a vaincu un préjugé et trouvé une application nouvelle du tungstène. The inventor has overcome a prejudice and found a new application for tungsten.
Le tungstène est un métal très dur et donc à priori difficile à microniser de telle sorte qu'on le trouve généralement dans le commerce-avec une granulométrie d'environ 15 microns. Ce métal dur est utilisé principalement en métallurgie. Tungsten is a very hard metal and therefore a priori difficult to micronize so that it is generally found commercially - with a particle size of about 15 microns. This hard metal is used mainly in metallurgy.
Bien que ces facteurs entraînent un préjugé défavorable dans l'utilisation du tungstène comme opacifiant d'un cathéter fabriqué par extrusion, l'inventeur a découvert que ce métal présentait une forte opacité aux rayons X, de très bonnes qualités de mélange avec les thermoplastiques, une très bonne tolérance par le corps humain, une excellente tenue en température et permettait d'obtenir des surfaces parfaitement lisses. L'inventeur a donc découvert qu'il était possible d'utiliser un métal pur comme matière opacifiante et que, parmi tous les métaux connus, le tungstène était particuliérement approprie. Although these factors lead to an unfavorable prejudice in the use of tungsten as opacifier of a catheter manufactured by extrusion, the inventor discovered that this metal exhibited a high opacity with X-rays, very good qualities of mixture with thermoplastics, very good tolerance by the human body, excellent temperature resistance and made it possible to obtain perfectly smooth surfaces. The inventor therefore discovered that it was possible to use a pure metal as an opacifying material and that, among all the known metals, tungsten was particularly suitable.
C'est pourquoi l'inventeur propose un cathéter comportant un mélange d'au moins un thermoplastique avec une matière opaque aux rayons X, qui est remarquable en ce que la matière opaque aux rayons X est du tungstène. This is why the inventor proposes a catheter comprising a mixture of at least one thermoplastic with an material opaque to X-rays, which is remarkable in that the material opaque to X-rays is tungsten.
Le tungstène qui est mélangé avec le ou les thermoplastiques est préalablement micronisé, c'est à dire réduit en particules de l'ordre du micron, tandis que sa proportion dans le mélange final est d'environ 20%, soit bien moins qu'avec un oxyde de bismuth par exemple. The tungsten which is mixed with the thermoplastic (s) is micronized beforehand, that is to say reduced to particles of the order of a micron, while its proportion in the final mixture is around 20%, which is much less than with bismuth oxide for example.
L'inventeur propose un procédé de fabrication selon la technique d'extrusion qui consiste à:
a) microniser du tungstène,
b) mélanger le tungstène micronisé avec au moins un
thermoplastique en copeaux ou en granulés,
c) extruder à chaud le mélange obtenu sous forme de joncs,
d) transformer les joncs obtenus en particules régulières,
e) extruder le cathéter à partir des particules ainsi
obtenues.The inventor proposes a manufacturing process according to the extrusion technique which consists in:
a) micronize tungsten,
b) mixing the micronized tungsten with at least one
thermoplastic in chips or granules,
c) hot extruding the mixture obtained in the form of rods,
d) transform the rods obtained into regular particles,
e) extruding the catheter from the particles as well
obtained.
Toutefois, pour obtenir encore un meilleur mélange à chaud, l'inventeur préconise d'effectuer plusieurs fois l'opération c) en procédant à chaque fois à une opération intermédiaire de broyage des joncs obtenus à la fin de chaque opération c). However, to obtain even better hot mixing, the inventor recommends performing operation c) several times, each time carrying out an intermediate operation of grinding the rods obtained at the end of each operation c).
Aprés la dernière opération c), les joncs subissent alors l'opération d) précitée de manière à obtenir un mélange mattre prêt à l'extrusion définitive des cathéters. After the last operation c), the rods then undergo the aforementioned operation d) so as to obtain a masterbatch ready for the final extrusion of the catheters.
Il est bien sûr possible de rajouter dans les mélanges des colorants pour différencier ultérieurement les cathéters obtenus. It is of course possible to add dyes to the mixtures to subsequently differentiate the catheters obtained.
En outre, si le cathéter peut ne comporter qu'une couche, il est bien sûr possible aussi de coextruder au moins un revêtement thermoplastique avec la couche comportant le tungstène. In addition, if the catheter may have only one layer, it is of course also possible to coextrude at least one thermoplastic coating with the layer comprising tungsten.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8409181A FR2571621A3 (en) | 1984-06-13 | 1984-06-13 | X-ray opaque (radiopaque) catheter tube and its method of manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8409181A FR2571621A3 (en) | 1984-06-13 | 1984-06-13 | X-ray opaque (radiopaque) catheter tube and its method of manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2571621A3 true FR2571621A3 (en) | 1986-04-18 |
Family
ID=9304929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8409181A Withdrawn FR2571621A3 (en) | 1984-06-13 | 1984-06-13 | X-ray opaque (radiopaque) catheter tube and its method of manufacture |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2571621A3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0987042A3 (en) * | 1998-09-15 | 2000-11-02 | Medtronic, Inc. | Design and method to fabricate PTCA balloon radiopaque marker band |
WO2003053235A2 (en) * | 2001-12-12 | 2003-07-03 | Medtronic Inc. | Guide catheter |
-
1984
- 1984-06-13 FR FR8409181A patent/FR2571621A3/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0987042A3 (en) * | 1998-09-15 | 2000-11-02 | Medtronic, Inc. | Design and method to fabricate PTCA balloon radiopaque marker band |
WO2003053235A2 (en) * | 2001-12-12 | 2003-07-03 | Medtronic Inc. | Guide catheter |
WO2003053235A3 (en) * | 2001-12-12 | 2004-02-26 | Medtronic Inc | Guide catheter |
US7065394B2 (en) | 2001-12-12 | 2006-06-20 | Medtronic, Inc | Guide catheter |
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Date | Code | Title | Description |
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ST | Notification of lapse |