WO2019053191A1 - Cathéter médical, système médical et procédé pour la fabrication d'un cathéter médical - Google Patents

Cathéter médical, système médical et procédé pour la fabrication d'un cathéter médical Download PDF

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Publication number
WO2019053191A1
WO2019053191A1 PCT/EP2018/074886 EP2018074886W WO2019053191A1 WO 2019053191 A1 WO2019053191 A1 WO 2019053191A1 EP 2018074886 W EP2018074886 W EP 2018074886W WO 2019053191 A1 WO2019053191 A1 WO 2019053191A1
Authority
WO
WIPO (PCT)
Prior art keywords
monofilament
catheter
bundle
medical catheter
degrees
Prior art date
Application number
PCT/EP2018/074886
Other languages
German (de)
English (en)
Inventor
Giorgio Cattaneo
Michael BÜCHERT
Original Assignee
Acandis Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Acandis Gmbh filed Critical Acandis Gmbh
Priority to EP18773124.5A priority Critical patent/EP3681577A1/fr
Publication of WO2019053191A1 publication Critical patent/WO2019053191A1/fr

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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
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/0012—Making of catheters or other medical or surgical tubes with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
    • 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
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • 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
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
    • 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
    • A61M2025/0046—Coatings for improving slidability
    • 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

Definitions

  • the invention relates to a medical catheter according to the preamble of patent claim 1. Furthermore, the invention relates to a medical system and a method for producing a medical catheter.
  • Such a medical catheter is known, for example, from DE 697 20 583 T2.
  • the known catheter has a tubular body with an inner lumen.
  • the tubular body may be made of a polymeric material for the catheter tube and a metal reinforcing braid.
  • the reinforcing braid is formed of stainless steel wires and extends along the tubular body.
  • the inner lumen of the catheter In the case of intracranial medical catheters for the aspiration of a thrombus, it is necessary in particular for the inner lumen of the catheter to have the largest possible cross-sectional diameter so that the thrombi to be aspirated do not completely close the inner lumen.
  • the cross-sectional diameter of the inner lumen is generally limited not only by the available outer cross-sectional diameter of the catheter, but also by the thickness of the catheter tube and the thickness of the catheter
  • the catheter may be prone to ovalization by the metallic reinforcing braid.
  • the ovalization of the catheter denotes a deformation of the catheter cross-section and thus also of the inner lumen.
  • the cross-sectional geometry of an example circular cylindrical catheter by ovalization at least locally occupy an oval cross-sectional geometry.
  • the catheter cross-section could be deformed in such a way that the inner lumen is obstructed and no longer has a free passage area.
  • the invention is therefore based on the object to provide a medical catheter in which the largest possible cross-sectional diameter of the
  • Inner lumen can be achieved with sufficient kink resistance.
  • the invention is also based on the object of specifying a medical system and a method for producing a medical catheter. This object is achieved by a medical catheter having the features of claim 1. With regard to the medical system, the object is solved by the subject-matter of claim 12 and with regard to the method by the subject-matter of claim 13.
  • the invention is based on the idea of a medical catheter
  • the reinforcing element comprises at least two reinforcing structures, wherein a first reinforcing structure of at least one monofilament and a second reinforcing structure of at least one multifilament bundle is formed.
  • the monofilament and the multifilament bundle are intertwined.
  • the monofilament has a first winding direction and the multifilament bundle has a second winding direction, wherein the first winding direction is different from the second winding direction.
  • the reinforcing element can in the context of the application one of the
  • Catheter tube be separate component or form a separate component of the catheter.
  • the reinforcing element can be fixed to the catheter
  • the reinforcing element changes the mechanical properties of the catheter tube. That's how it works
  • Reinforcement element be designed such that the bending behavior of the
  • Catheter tube is improved.
  • Catheter tube can be increased.
  • the reinforcing element has the advantage that The catheter can move well even in tight bends well in a blood vessel. The navigation capability of the catheter is preserved. Moreover, the reinforcing element ensures that the inner lumen does not deform.
  • a multifilament bundle comprises at least two individual monofilaments.
  • the monofilaments may be formed as fibers, in particular as synthetic fibers.
  • the formation of a bundle means that the individual monofilaments of the multifilament bundle, in particular at least in sections, are in contact with one another and run in the same direction, for example parallel to one another. In particular, there are two adjacent ones
  • Monofilaments in contact along a line and run there in the same winding direction.
  • the multifilament bundle can take any geometric shape,
  • the multifilament bundle has a band-like geometric shape.
  • the invention accordingly has the advantage that the wall thickness of the catheter can be significantly reduced by combining a monofilament with a multifilament bundle, in particular a flat multifilament bundle. Accordingly, the diameter of the inner lumen can advantageously be increased while the catheter outer diameter remains the same. A blockage of the
  • Inner lumen, exemplified by thrombi to be sucked can therefore be prevented.
  • the monofilament and the multifilament bundle are intertwined.
  • the multifilament bundle can be woven or woven into the monofilament.
  • Multifilament bündels different from each other.
  • the monofilament extends in a different direction than the multifilament bundle.
  • the woven multifilament bundle in particular the woven bundle of fibers, can significantly reduce the diameter of the reinforcing element. It can thus be due to the reducible diameter of the
  • Reinforcing element with constant outer diameter of the catheter preferably increase the diameter of the inner lumen.
  • Reinforcing element with constant outer diameter of the catheter preferably increase the diameter of the inner lumen.
  • the reinforcing element according to the invention which at least two
  • Catheters for various modes of operation such as delivery catheters, thermostatic catheters, or aspiration catheters. Since it can be ensured by means of the reinforcing element that the inner lumen does not deform, an impairment of the cooling capacity is avoided by way of example in inner lumens, which carry cooling fluid.
  • inner lumens which are exemplified as a passageway to medical instruments to the
  • Maintaining the site of delivery of the medical instruments is maintained even when the catheter is passed through a tight bend.
  • the medical catheter can be constructed multilayered by way of example for intracranial application.
  • the inner layer which is directly adjacent to the inner lumen, may consist of a friction-reducing material, in particular a
  • the inner layer comprises a chemically resistant material.
  • the reinforcing element On the inner layer, the reinforcing element may be attached to the at least two reinforcing structures.
  • the reinforcing element thus forms the second layer.
  • the first reinforcing structure may be exemplified as
  • Monofilament include a metal wire.
  • the second reinforcing structure may include, for example as a multifilament bundle, a polymer fiber bundle. The monofilament and the multifilament bundle are intertwined.
  • a third layer can be attached to the reinforcing element.
  • the third layer may preferably be formed as a polymer layer in various Shore hardnesses.
  • the third layer may be
  • the third layer may preferably consist of a thermoplastic elastomer, in particular polyether block amide (PEBA), polyurethane (PU), Polyamide (PA) or comparable materials.
  • PEBA polyether block amide
  • PU polyurethane
  • PA Polyamide
  • the third layer can be extruded directly onto the other layers, dipped or attached to the other layers by means of a reflow process.
  • the multifilament bundle is designed such that it can be transferred from a bundled arrangement into a planar arrangement in a braiding process with the monofilament of the first reinforcement structure orthogonal to a bundle axis.
  • the plane arrangement of the multi-purpose bundle refers to the mesh level.
  • the individual monofilaments of the multifilament bundle can be juxtaposed in one and the same plane, i. H. be arranged planar.
  • all monofilaments of the multifilament bundle lie parallel to each other in a plane.
  • the multifilament bundle is thus designed to be compressible.
  • the compressibility of the multifilament bundle further has the advantage of being flexibly adaptable to various modes of operation of the catheter.
  • the multifilament bundle can be transferable from a bundled arrangement into a flat arrangement under an occurring surface pressure.
  • a surface pressure can occur when pushing the medical catheter through tight vessel bends.
  • the braid can be bent from the multifilament bundle and the monofilament of the first reinforcing structure.
  • a surface pressure on the multifilament bundle acts at the bending point, whereby it can be converted into a planar arrangement.
  • the planar arrangement of the multifilament bundle can by the
  • the multilayered structure of the catheter can be fixed.
  • the planar arrangement can be maintained by embedding the reinforcing element in an inner and outer layer of the catheter.
  • the planar arrangement of the multifilament bundle can be determined by a ratio between the width and height of the multifilament bundle.
  • the height h of the multifilament bundle is determined substantially perpendicular to the braid plane.
  • the width b of the multifilament bundle is determined in the mesh level.
  • the bundle has a greater width b than height h.
  • the ratio h / b between height and width of the multifilament bundle can be from 0.01 to 0.8, in particular 0.5.
  • the ratio h / b between height and width of the multifilament bundle between 1/2 and 1/10, in particular 1/10 or 1/8 or 1/7 or 1/6 or 1/5 or 1/4 or 1/3 or 1/2.
  • the multfilament bundle resembles a ribbon fiber. As a result, the catheter wall thickness can be further reduced.
  • the reinforcing element can have a different number
  • Reinforcement structure and multifilament bundles of the second reinforcing structure 4/2 or 8/4 amount are Reinforcement structure and multifilament bundles of the second reinforcing structure 4/2 or 8/4 amount. For example, thus 4 wires and 2
  • Multifilamentbündel or 8 wires and 4 multifilament bundles to form the reinforcing element are intertwined.
  • the use of 8 monofilaments, in particular wires, and 4 multifilament bundles is particularly preferred.
  • the first reinforcing structure comprises a first material
  • the first reinforcing structure may be formed from at least one metal wire.
  • Preferred materials are stainless steel or a nickel-titanium alloy.
  • the wire may preferably be formed as a radiopaque wire.
  • the second reinforcing structure which is formed from at least one multifilament bundle, may for example comprise a bundle of individual synthetic fibers, in particular multifilament polymer fibers.
  • the plastic fibers may be formed of para-aramid. It is of particular advantage if the bundle is formed from a material which has a low weight or a low elongation or a has high tensile strength. Furthermore, it is of particular advantage if the bundle is formed from a material which has a temperature resistance up to 650 ° C.
  • the wire, or the wires or the individual fibers as
  • the combination of two different materials for the first and second reinforcing structure has the advantage that the reinforcing element can be flexibly adapted to various required conditions for different applications of the medical catheter with regard to friction behavior, bending flexibility, kink resistance, in particular to strong curvatures in bifurcation, ovalization behavior or navigability ,
  • the at least one monofilament forms a helical turn or a tubular braid around the longitudinal axis of the catheter tube.
  • the monofilament can be formed as a wire mesh or braiding. It can be used for this purpose a single wire or more wires.
  • the wire or wires may be braided or intertwined to form meshes.
  • the meshes of the braid form a basic structure that enhances the mechanical properties of the fabric
  • the design as a braid has the advantage that the controllability, or navigability of the catheter can be improved, especially in bifurcations.
  • the wire mesh can advantageously be a torque transmission of a proximally initiated torque.
  • the monofilament may be formed as a coil or spiral. In this case, the turn preferably extends helically or helically around the longitudinal axis of the inner lumen or catheter tube.
  • the embodiment of a coil has the advantage that compared to the mesh, the diameter of the catheter wall thickness can be further significantly reduced.
  • the reinforcing element is formed as a coil or braid with a braided polymer fiber bundle as a multifilament bundle. In this case, the winding direction of the braided multifilament bundle is different from the winding direction of the coil or the braid. In other words The multifilament bundle runs in a different direction than the coil or the braid.
  • the multifilament bundle is aligned parallel to the longitudinal axis of the catheter tube.
  • Multifilament may be arranged longitudinally in the catheter tube. Accordingly, the multifilament bundle is preferably woven into the monofilament. In particular, the multifilament bundle is not above the
  • Expansion stiffness of the reinforcing element can be increased.
  • the catheter is formed Periodlumig, wherein the reinforcing element forms a part of the wall of at least one inner lumen.
  • an inner circumference of the inner lumen can be replaced by a
  • Inner lumen supports, thus preventing deformation of the inner lumen.
  • the wall may be formed of three layers, wherein the inner layer, which is directly adjacent to the inner lumen of a
  • Reibmindernden material may be formed.
  • the reinforcing element On the inner layer, the reinforcing element may be arranged.
  • a third layer On the reinforcing element, a third layer may be arranged, which in particular as a polymer layer
  • each inner lumen is assigned a reinforcing element.
  • the multi-lumen design of the catheter comprises at least two inner lumens. This has the advantage that the catheter by means of several
  • Inner lumen can perform various functions, such as aspiration and infusion, simultaneously in a single device.
  • the reinforcing element extends over the entire length of the inner lumen.
  • the inner lumen can be completely lined by the reinforcing element. This is advantageous in order to provide the bending-resistant or kink-resistant properties of the catheter tube over all regions of the catheter tube.
  • the catheter has a diameter which is at most 8 Fr, in particular at most 7 Fr, in particular at most 6 Fr, in particular at most 5 Fr, in particular at most 4 Fr, in particular at most 3 Fr, in particular at most 2.5 Fr, in particular at most 2 Fr is.
  • a catheter diameter of 6 Fr or 7 Fr or 8 Fr is particularly preferred.
  • the monofilament and / or the multifilament bundle may have a braiding angle in relation to a projection of the longitudinal axis of the catheter tube into a
  • Form wall plane of the catheter tube Form wall plane of the catheter tube.
  • the pitch of the turns of the monofilament or the multifilament bundle is described by an angle which is between the monofilament or the
  • Multifilamentbündel and a longitudinal axis of the catheter tube extends, wherein the longitudinal axis is projected into the wall plane in which the monofilament or the multifilament bundle are arranged.
  • Monofilament and the multifilament have the same or different braiding angle.
  • the braiding angle can be at rest, d. H. in the non-powered state, in particular in the straight extended state, the catheter tube at least 60 degrees, in particular at least 65 degrees, in particular at least 67.5 degrees, in particular at least 70 degrees, in particular at least 72.5 degrees. It is possible that the braiding angle is at most 85 degrees, in particular at most 82.5 degrees, in particular at most 80 degrees, in particular at most 77.5 degrees.
  • the braiding angle of the monofilament and / or the multifilament bundle is between 75 degrees and 80 degrees.
  • the monofilament may be formed by a round wire or a flat wire. In a round wire, it is preferable if this one
  • the flat wire has a height between 20 ⁇ and 30 ⁇ , in particular 25 ⁇ , and a width between 50 ⁇ and 100 ⁇ , in particular 75 ⁇ having.
  • the monofilament is made of a steel wire, in particular
  • first reinforcing structure exclusively one monofilament or more monofilaments with the first winding direction and the second reinforcing structure exclusively
  • Multifilament bundles are preferably intertwined with each other
  • braids can be used.
  • a 1-over-1 weave or a 2-over-1 weave is possible, with 2
  • Monofilaments each cross a multifilament or cross.
  • a multifilament bundle crosses over two monofilaments, then undercuts two monofilaments and again crosses over the next two monofilaments.
  • Two monofilaments running in parallel can cross over one multifilament bundle, undercut one subsequent multifilament bundle and one next
  • Such a braiding pattern is preferred for an embodiment of the invention in which the catheter tube has twice as many monofilaments as multifilament bundles.
  • a medical system with a medical catheter according to one of the preceding embodiments which further comprises an aspiration unit for aspirating substances from a blood vessel, which is connectable to the inner lumen of the medical catheter.
  • the aspiration unit may be a suction device or a syringe.
  • catheter tube having a reinforcing element.
  • Reinforcing element comprises at least two reinforcing structures, wherein a first reinforcing structure is formed from at least one monofilament and a second reinforcing structure is formed from at least one multifilament bundle, wherein the multifilament bundle comprises a plurality of monofilaments which are pressed by means of an extruder and bundled by means of an electric field.
  • the monofilaments may be exemplified by fibers be formed, which are produced via a method which the
  • Electrospinning is similar. This means that the monofilaments or fibers are pressed out via an extruder or a die. Due to the applied electric field, the monofilaments are bundled or drawn to a point and therefore form a multifilament bundle.
  • the monofilaments are further processed after bundling.
  • the trained multifilament bundle can be processed in such a way that advantageous material properties can be set. More preferably, the monofilaments are after bundling
  • the anti-wicking properties denote a lack of wicking of the formed coated
  • Multifilament bundles referred to which can transport liquid due to the surface properties by capillary action along the fiber.
  • any type of desired surface properties of the multifilament bundle can be adjusted to optimally accommodate different modes of operation of the catheter
  • the biocompatibility or else the radiopacity of the multifilament bundle can be adjusted by means of the surface treatment. Further advantageous can be prevented by means of the surface treatment of a material fatigue.
  • the medical system and method may alternatively or additionally comprise a single or a combination of several features previously mentioned with respect to the medical catheter.
  • Fig. 1 is a detail view of a reinforcing element for a
  • Fig. 2 is a detail view of a reinforcing element for a
  • Fig. 1 shows a detailed view of a reinforcing element 10 for a medical catheter, not shown, according to a first embodiment.
  • the catheter may comprise a catheter tube, not shown, and at least one inner lumen 18, wherein the catheter tube, the reinforcing element 10 is associated.
  • the reinforcing element 10 comprises two reinforcing structures 11, 12.
  • a first reinforcing structure 11 is formed by a metallic braid 13.
  • the braid 13 comprises two monofilaments 16.
  • the monofilaments 16 are formed as wires, which are intertwined to form meshes in the braid 13.
  • Preferred materials are stainless steel or a nickel-titanium alloy.
  • the braid 13 may alternatively consist of a single wire as
  • Monofilament 16 may be formed, which is intertwined with itself.
  • the braid 13 forms a tubular body about a longitudinal axis of the inner lumen 18. Axially and longitudinally, a second reinforcing structure 12 is arranged.
  • the second reinforcing structure 12 is formed by a multifilament bundle 17, or a bundle of individual synthetic fibers 15.
  • Multifilament bundles 17 comprise a plurality of monofilaments or individual ones
  • Plastic fibers 15 By way of example, the bundle of para-aramid fibers is formed. The material of the bundle is different from the material of the braid 13.
  • the multifilament bundle 17 is interwoven with the braid 13. Specifically, the multifilament bundle 17 is woven into the braid 13. This shows that
  • Multifilament bundles 17 a different winding direction than the braid 13.
  • the multifilament bundle 17 extends axially along the longitudinal axis of the reinforcing element 10 or of the inner lumen 18.
  • the multifilament bundle 17 has a planar arrangement.
  • the individual plastic fibers 15 of the multifilament bundle lie parallel to one another and are arranged in the braiding plane. Thus, the thickness or the diameter the reinforcing element 10 and thus the catheter wall thickness are significantly reduced.
  • Multifilamentbündels 17 in direct contact with each other or in sections in adjacent loops of the braid 13th
  • the multifilament bundle 17 is designed in such a way that it is transferred in the braiding process with the braid 13 orthogonal to a bundle axis of a bundled arrangement in a planar arrangement.
  • the meshes of the braid 13 form a basic structure which largely determines the mechanical properties of the reinforcing element 10 and supports the braided multifilament bundle 17.
  • the design as braid 13 has the advantage that the controllability, or navigability of the catheter can be improved, especially in bifurcations.
  • FIG. 2 shows a detailed view of a reinforcing element 10 for a medical catheter, not shown, according to a further exemplary embodiment.
  • the catheter may comprise a catheter tube, not shown, and at least one inner lumen 18, wherein the catheter tube, the reinforcing element 10 is associated.
  • the reinforcing element 10 comprises two reinforcing structures 11, 12.
  • a first reinforcing structure 11 is formed by a metallic coil 14.
  • the coil 14 comprises a monofilament 16.
  • the monofilament 16 is formed as a wire.
  • Preferred materials are stainless steel or a nickel-titanium alloy.
  • the coil 14 forms a tubular body about a longitudinal axis of the
  • Inner lumen 18 The coil forms a helical turn.
  • the winding extends helically around the longitudinal axis of the inner lumen 18 or
  • the coil 14 has a first winding direction about the
  • Reinforcement structure 12 is arranged.
  • the second reinforcing structure 12 is formed by a multifilament bundle 17, or a bundle of individual synthetic fibers 15.
  • the bundle comprises several monofilaments or individual ones
  • the bundle of para-aramid fibers is formed.
  • the material of the bundle is different from the material of the coil 14.
  • the multifilament bundle 17 is in an opposite winding direction with the coil 14 intertwined.
  • the multifilament bundle 17 extends along the longitudinal axis of the reinforcing element 10 or of the inner lumen 18.
  • the multifilament bundle 17 has a planar arrangement.
  • the individual plastic fibers 15 of the multifilament bundle 17 lie parallel to one another and are arranged in a common braiding plane with the coil 14.
  • the coil 14 and the braided multifilament bundle 17 form a kind of braid.
  • the multifilament bundle 17 is designed such that in the braiding process with the coil 14 it is transferred orthogonal to a bundle axis from a bundled arrangement into a planar arrangement.

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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

L'invention concerne un cathéter médical, qui présente un tube flexible de cathéter et au moins une lumière interne (18), un élément de renforcement (10) étant associé au tube flexible de cathéter. L'élément de renforcement (10) comprend au moins deux structures de renforcement (11, 12), une première structure de renforcement (11) étant formée à partir d'au moins un monofilament (16) et une deuxième structure de renforcement (12) étant formée à partir d'au moins un faisceau multifilament (17). Le monofilament (16) et le faisceau multifilament (17) sont entrelacés l'un dans l'autre. Le monofilament (16) présente une première direction d'enroulement et le faisceau multifilament (17) présente une deuxième direction d'enroulement, la première direction d'enroulement étant différente de la deuxième direction d'enroulement. L'invention concerne en outre un système médical et un procédé de fabrication d'un cathéter médical.
PCT/EP2018/074886 2017-09-15 2018-09-14 Cathéter médical, système médical et procédé pour la fabrication d'un cathéter médical WO2019053191A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18773124.5A EP3681577A1 (fr) 2017-09-15 2018-09-14 Cathéter médical, système médical et procédé pour la fabrication d'un cathéter médical

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017121436.4 2017-09-15
DE102017121436.4A DE102017121436A1 (de) 2017-09-15 2017-09-15 Medizinischer Katheter, medizinisches System und Verfahren zur Herstellung eines medizinischen Katheters

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WO2019053191A1 true WO2019053191A1 (fr) 2019-03-21

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PCT/EP2018/074886 WO2019053191A1 (fr) 2017-09-15 2018-09-14 Cathéter médical, système médical et procédé pour la fabrication d'un cathéter médical

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EP (1) EP3681577A1 (fr)
DE (1) DE102017121436A1 (fr)
WO (1) WO2019053191A1 (fr)

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EP2080535A1 (fr) * 2006-11-07 2009-07-22 Kaneka Corporation Tube cathéter destiné à un usage médical

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US6942654B1 (en) * 2000-01-19 2005-09-13 Scimed Life Systems, Inc. Intravascular catheter with axial member
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