EP0410994A1 - Catheter with distally moulded-on catheter point and securing fibre - Google Patents

Catheter with distally moulded-on catheter point and securing fibre

Info

Publication number
EP0410994A1
EP0410994A1 EP19890904554 EP89904554A EP0410994A1 EP 0410994 A1 EP0410994 A1 EP 0410994A1 EP 19890904554 EP19890904554 EP 19890904554 EP 89904554 A EP89904554 A EP 89904554A EP 0410994 A1 EP0410994 A1 EP 0410994A1
Authority
EP
European Patent Office
Prior art keywords
catheter
fiber
securing
catheter tube
bundle
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Withdrawn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
EP19890904554
Other languages
German (de)
French (fr)
Inventor
Theodor Greive
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0410994A1 publication Critical patent/EP0410994A1/en
Withdrawn legal-status Critical Current

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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
    • A61M25/005—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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/0069—Tip not integral with tube

Definitions

  • the invention relates to a catheter with a distally shaped catheter tip, in particular attached by injection molding, a continuous securing fiber being embedded in the catheter tube and in the molded tip to secure the connection between the catheter tube and the molded tip.
  • Catheters in particular with coarser lengths, are produced by extruding ⁇ ati ⁇ e terrohre from a suitable polymer material and then dividing a practically endless tube into catheters of the desired length. Then connecting pieces are attached to the Ronrabscnni tte of the appropriate length at the rear end of the catheter for later coupling of suction devices in fusion lines and the like.
  • a catheter tip must be formed on the distal side, the design of which depends on the function of the catheter. The tip must be rounded so that there are no injuries when it is introduced into vessels. Furthermore, some catheters should have a closed tip instead of an open tip and the lumens end in side holes or there should be a space in the tip for a sensor.
  • the tube sections were previously reworked using cutting or / and thermoforming methods. Attempts have also been made to weld on, glue on separate tips or to form them by means of injection molding. When the catheter tips are subsequently formed, the firm adhesion of the connecting surfaces is of particular importance.
  • the object of the present invention is to provide a constructive design of a tip which is subsequently molded onto a catheter tube and which offers the highest possible degree of security against undesired detachment of the tip during use.
  • a catheter with a distally formed catheter tip or is characterized in that a securing fiber or a securing fiber bundle is arranged in the wall of the catheter tube or in a lumen of the catheter terronre, the end of which protrudes beyond the end of the catheter tube and into that by injection molding molded catheter end made of polymer material is embedded on the catheter tube.
  • a spherical, cylindrical, disc-shaped, conical, cuboid or ellipsoidal end piece to the end of the securing fiber, which is firmly connected to the securing fiber or the securing fiber bundle, in order to increase the volume of the end.
  • the volume can also be increased by attaching a ring attached to the fiber end.
  • Both the securing fiber or the securing fiber bundle and the end piece can be made of glass, metal, plastic or carbon; when using a fiber bundle, a mixture of individual fibers made from these materials can be used.
  • the end piece for increasing the volume of the security fiber can also be a measurement receiver, in which case the securing fiber bundle contains the connecting and supply lines of the measurement receiver, and the end piece in this case is arranged in the molded-on catheter end so that the sensor surface of the measurement receiver is not from Polymer material is covered and is arranged on the outer surface of the catheter end. If necessary, the sensor can also be placed in such a way that the sensor surface is open to one of the lumens of the catheter in the vicinity of the tip.
  • the polymer material of the molded catheter end is compatible with the polymer material of the catheter tube and allows a firm connection to the adjoining surfaces.
  • thermoplastics which become plastic in the same temperature range, so that when the injection molding is carried out, the prefabricated catheter tube end is heated at least at the connection surface to such an extent that there is an adhesive connection between the catheter tube and the molded-on catheter end.
  • the particular advantage of the separately molded tip is that a softer material or one with better formability can optionally be used and the catheter tip can be designed according to the special requirements of the catheter, for example in the case of multi-layer catheters the lumens can end at a distance from one another. Lateral openings or a closed catheter tip can optionally be formed.
  • Securing fiber attached end piece under X-rays provides contrast, the position of the catheter can be easily monitored during use.
  • Fig. 1 shows in longitudinal section the tip 1 of a catheter, which was subsequently attached to a multi-lumen catheter tube 2 by injection molding.
  • the main lumen 3 ends in several lateral openings.
  • the front catheter end 5 is closed and rounded.
  • a securing fiber 7 or a fiber bundle the end of which over the end of the catheter tube, has been arranged in the manufacture of the catheter tube 2 in a second lumen 6 separated from the main lumen 3 or in the wall of the catheter tube 2 2 protrudes.
  • a section of the catheter material can be removed at one end of the section after being divided into the desired lengths, so that a piece of the securing fiber projects beyond the end of the catheter tube 2 for embedding in the catheter tip 5.
  • the securing fiber 7 At the end of the securing fiber 7, its volume is coarsened by attaching an end piece 8 which is embedded in the catheter end 5 which is subsequently molded by injection molding.
  • the Enostuck can take various forms
  • the decisive factor is the increase in volume of the end and the firm connection with the security fiber or the security fiber bundle.
  • the end piece is preferably spherical, cylindrical, disk-shaped, cuboid, ellipsoidal or conical.
  • the securing fiber 7 with the end piece 8 embedded in the catheter end 5 secures the connection point 9 between the catheter tube 2 and the integrally formed catheter end 5 against undesired loosening of the tip.
  • the connecting surface 9 between the catheter tube 2 and the molded catheter end 5 extends at right angles to the longitudinal axis of the catheter.
  • the catheter tube 2 can also be provided with a connecting surface that extends obliquely to the axis when dividing long pieces of pipe to the desired length, or an oblique connecting surface can be produced when the end of the fiber 7 is exposed.
  • the connecting surface of the catheter end 5 to be injection molded is correspondingly bevelled with a tool designed in this way.
  • a stepped design of the end of the catheter tube 2 is also possible, but this is not preferred because of the additional processing step required.
  • the securing fiber 5 is arranged in a second lumen 6 laterally to the main lumen 3 and has an end that is embedded in the molded tip 5 with a diameter de r fiber enlarged end piece 8.
  • the end piece 8 is arranged in the tip 5 so eccentrically to the axis of the catheter that part of the surface of the end piece is no longer covered by the mandrel material. Such an arrangement of the end piece 8 is preferred if the end piece is simultaneously designed as a measuring sensor.
  • the securing fiber 7 slips in such a construct tive design of the connection and supply line of the transducer.
  • the securing fiber 7 is arranged on the inner wall of the catheter tube 2 and is not particularly separated from the main lumen 3.
  • the end piece 8 on the securing fiber 7 is designed as a ring which is embedded in the integrally formed end part 5. If the ring 8 is made, for example, of a material that produces contrast under X-rays, this embodiment allows the insertion of the inserted catheter end.
  • the ring is arranged within the end piece 5 such that the sensor surface is not covered by the polymer material, but is free and is located, for example, on the outer surface of the end part 5 .
  • Thermoplastic materials are particularly suitable for molding on the end part. These include polyvinyl chloride, polyethylene, polypropylene, polyurethanes, polyamides, polyesters, polycaroonates, polystyrenes, silicone elastomers and synthetic rubbers as well as copolymers in addition to homopolymers.
  • the plastic materials are medically compatible, so that the catheters according to the invention can also be permanently implanted.

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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)
  • Endoscopes (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Ledit cathéter (1) comprend, dans la paroi du tube du cathéter (2) ou dans un lumen (3, 6) du tube du cathéter (2), une fibre de retenue ou un faisceau de fibres de retenue (7) dont l'extrémité, qui dépasse l'extrémité du tube du cathéter (2), est incorporée dans l'extrémité du cathéter (5) en polymère fixée par moulage par injection au tube du cathéter (2).Said catheter (1) comprises, in the wall of the catheter tube (2) or in a lumen (3, 6) of the catheter tube (2), a retaining fiber or a bundle of retaining fibers (7), the l The end, which extends beyond the end of the catheter tube (2), is incorporated into the end of the polymer catheter (5) attached by injection molding to the catheter tube (2).

Description

Katheter mit distal angeformter Katheterspitze und SicherungsfaserCatheter with distally formed catheter tip and securing fiber
υie Erfindung ricntet sich auf einen Katheter mit distal angeformter, insbesondere durch Spritzgieben angebrachter Katheterspitze, wobei zur Sicherung der Verbindung zwischen dem Katheterronr und der angespritzten Spitze eine durchgehende Sicherungsfaser in das Katheterrohr und in die angespritzte Spitze eingebettet ist.The invention relates to a catheter with a distally shaped catheter tip, in particular attached by injection molding, a continuous securing fiber being embedded in the catheter tube and in the molded tip to secure the connection between the catheter tube and the molded tip.
Katheter, insbesondere mit gröberen Längen, werden dadurch hergestellt, daß man κatiιe terrohre aus einem geeigneten Polymermaterial durch Extrudieren herstellt und dann aas praktiscn endlos nergestellte Rohr in Katheter der gewünschten Lange aufteilt. Anschl iebend werden an die Ronrabscnni tte der passenden Länge ein am hinteren Ende des Katheters Anschlübstücke angebracht zum späteren Ankoppeln von Absaugvorrichtungen in Fusionsleitungen und dergleichen. An der distalen Seite mub eine Katheterspitze ausgebildet werden, deren konstruktive Gestaltung von der Funktion des Katheters abhängt. Die Spitze mub so abgerundet sein, daß es beim Einfuhren in Gefäße nicht zu Verletzungen kommt. Weiterhin sollen manche Katheter anstelle einer offenen Spitze eine geschlossene Spitze aufweisen und dafür die Lumen in seitlichen Lochern enden oder in der Spitze mub ein Platz für einen Mebwertaufnehmer vorhanden sein. Zur Ausbildung der speziellen Gestaltung der Katheterspitze wurden die Schlauchabschnitte bisher mit spanabhebenden oder/und tnermoformenden Methoden nachbearbeitet. Es ist auch schon versucht worden, separate Spitzen anzuschweißen, anzukleben oder mittels Einlegespritzguß anzuformen. Beim nachträglichen Anformen von Katheterspitzen kommt der festen Haftung der Verbindungsflächen Desondere Bedeutung zu.Catheters, in particular with coarser lengths, are produced by extruding κatiιe terrohre from a suitable polymer material and then dividing a practically endless tube into catheters of the desired length. Then connecting pieces are attached to the Ronrabscnni tte of the appropriate length at the rear end of the catheter for later coupling of suction devices in fusion lines and the like. A catheter tip must be formed on the distal side, the design of which depends on the function of the catheter. The tip must be rounded so that there are no injuries when it is introduced into vessels. Furthermore, some catheters should have a closed tip instead of an open tip and the lumens end in side holes or there should be a space in the tip for a sensor. To form the special design of the catheter tip, the tube sections were previously reworked using cutting or / and thermoforming methods. Attempts have also been made to weld on, glue on separate tips or to form them by means of injection molding. When the catheter tips are subsequently formed, the firm adhesion of the connecting surfaces is of particular importance.
Die nachträglich angebrachten Katheterspitzen dürfen sich bei Gebrauch nicht ablösen, denn dies wurde zu schwerwiegenden Koinpl iκatιonen bei der Verwendung fuhren und die Patienten gefanrden.The retrofitted catheter tips must not become detached during use, because this would lead to serious problems during use and the patients would be endangered.
Aufgabe der vorliegenden Erfindung ist es, eine konstruktive Gestaltung einer nachtraglich an ein Katheterrohr angeformten Spitze zu schaffen, die ein Höchstmaß an Sicherheit gegenüber unerwünschtem Ablösen der Spitze bei Gebrauch bietet.The object of the present invention is to provide a constructive design of a tip which is subsequently molded onto a catheter tube and which offers the highest possible degree of security against undesired detachment of the tip during use.
Diese Aufgabe wird gelost durch einen Katheter mit distal angeformter Katheterspitze, oer dadurch gekennzeichnet ist, dab in der wand des Katneterrohres oder in einem Lumen des Katneterronres eine Sicherungsfaser oder ein Sicherungsfaserbundel angeordnet ist, dessen Ende über das Ende des Katheterronres hinausragt und in das durch Spritzgieben an das Katheterrohr angeformte Katheterende aus Polymermaterial eingebettet ist.This object is achieved by a catheter with a distally formed catheter tip, or is characterized in that a securing fiber or a securing fiber bundle is arranged in the wall of the catheter tube or in a lumen of the catheter terronre, the end of which protrudes beyond the end of the catheter tube and into that by injection molding molded catheter end made of polymer material is embedded on the catheter tube.
Durch die feste Einbettung einer Sicherungsfaser oder eines Sicherungsfaserbundels, insbesondere in das Polymermaterial des angeformten Katheterendes ist gewährleistet, daß bei unzureichender Haftung an der Verbindungsflache des Katheterrohres und oer angespritzten Spitze ein vollständiges Ablösen oer Katheterspitze verhindert ist. Um die Verankerung der Sicherungsfaser in dem angeformten Katheterende zu verbessern, ist es bevorzugt, das vordere Ende der Sicne rungsfaser oder des Faserbundels im Volumen zu vergröbern. Diese Volumenvergroberung kann durch Anbringen eines Knotens in der Nahe des Faserendes erfolgen oder durch Auftrennen des Sicherungsfaserbundels in Einzelfasern. Ganz besonders bevorzugt ist es, am Ende der Sicherungsfaser zur Volumenvergroßerung des Endes ein kugelförmiges, zylindrisches, scheibenförmiges, kegelförmiges, quaderförmiges oder ellipsoides Endstuck anzubringen, das fest mit der Sicherungsfaser oder dem Sicherungsfaserbündel verbunden ist. Die Volumenvergrößerung kann auch durch das Anbringen eines am Faserende befestigten Ringes erfolgen.The firm embedding of a securing fiber or a securing fiber bundle, in particular in the polymer material of the molded catheter end, ensures that complete detachment of the catheter tip is prevented if there is insufficient adhesion to the connecting surface of the catheter tube and the molded tip. In order to improve the anchoring of the securing fiber in the molded catheter end, it is preferred to use the front end of the sicne fiber or bundle of fibers to coarsen in volume. This increase in volume can be done by attaching a knot near the end of the fiber or by separating the security fiber bundle into individual fibers. It is very particularly preferred to attach a spherical, cylindrical, disc-shaped, conical, cuboid or ellipsoidal end piece to the end of the securing fiber, which is firmly connected to the securing fiber or the securing fiber bundle, in order to increase the volume of the end. The volume can also be increased by attaching a ring attached to the fiber end.
Sowohl die Sicherungsfaser oder das Sicherungsfaserbundel als auch das Endstück Können aus Glas, Metall, Kunststoff oder Kohlenstoff sein, bei Verwendung eines Faserbundeis können eine Mischung von Einzelfasern aus diesen Werkstoffen verwendet werden.Both the securing fiber or the securing fiber bundle and the end piece can be made of glass, metal, plastic or carbon; when using a fiber bundle, a mixture of individual fibers made from these materials can be used.
Das Endstuck zur Volumenvergroßerung der Sicherungsfaser kann auch ein Mebwertaufnenmer sein, wobei in diesem Falle aas Si cherungsfaserbundel die Anschluß- und Versorgungsleitungen des Mebwertaufnehmer s enthalt, uas Endstuck ist in diesem Falle in dem angespritzten Katneterende so angeordnet, dab die Sensorflache des Mebwertaufnehmer s nicht von Polymermaterial oedeckt ist und an der Außenooerflache des Katheterendes angeordnet ist. Gegebenenfalls kann der Mebwertaufnehmer auch so plaziert sein, daß die Sensorflache gegenüber einem der Lumen des Katheters in der Nahe der Spitze offen ist. Das Polymermaterial des angespritzten Katheterendes ist mit dem Polymermaterial des Katheterrohres vertraglich und erlaubt eine feste Verbindung an den aneinandergrenzenden Flachen. Besonders bevorzugt ist es, Thermoplaste zu wählen, die im gleichen Temperaturbereich plastisch werden, so daß beim Anspritzen das vorgefertigte Katheterrohrende zumindest an der Veroindungsflache so weit erwärmt wird, dab es zu einer haftenden Verbindung zwischen dem Katheterrohr und dem angespritzten Katneterende kommt. Der besondere Vorteil oer separat angeformten Spitze besteht darin, daß man gegebenenfalls ein weicheres Material oder eines mit besserer Formbarkeit verwenden kann und die Katheterspitze entsprechend den speziellen Anforderungen des Katheters ausbilden kann, beispielsweise bei mehrl umigen Kathetern die Lumen in Abstand voneinander enden können. Es können gegebenenfalls seitliche Öffnungen oder eine geschlossene Katheterspitze ausgebildet werden.The end piece for increasing the volume of the security fiber can also be a measurement receiver, in which case the securing fiber bundle contains the connecting and supply lines of the measurement receiver, and the end piece in this case is arranged in the molded-on catheter end so that the sensor surface of the measurement receiver is not from Polymer material is covered and is arranged on the outer surface of the catheter end. If necessary, the sensor can also be placed in such a way that the sensor surface is open to one of the lumens of the catheter in the vicinity of the tip. The polymer material of the molded catheter end is compatible with the polymer material of the catheter tube and allows a firm connection to the adjoining surfaces. It is particularly preferred to choose thermoplastics which become plastic in the same temperature range, so that when the injection molding is carried out, the prefabricated catheter tube end is heated at least at the connection surface to such an extent that there is an adhesive connection between the catheter tube and the molded-on catheter end. The particular advantage of the separately molded tip is that a softer material or one with better formability can optionally be used and the catheter tip can be designed according to the special requirements of the catheter, for example in the case of multi-layer catheters the lumens can end at a distance from one another. Lateral openings or a closed catheter tip can optionally be formed.
Wenn das Material der Sicherungsfaser oder des an derIf the material of the securing fiber or of the
Sicherungsfaser angebrachten Endstückes unter Rontgenstrahlen Kontrast ergibt, läßt sich die Lage des Katheters bei der Verwendung leicht überwachen.Securing fiber attached end piece under X-rays provides contrast, the position of the catheter can be easily monitored during use.
Die Erfindung wird nun anhand der Figuren noch naher erl autert.The invention will now be explained in more detail with reference to the figures.
Fig. 1 zeigt im Längsschnitt die Spitze 1 eines Katheters, die an ein mehrlumiges Katheterrohr 2 nachträglich durch Spritzgieben angebracht wurde. Das Hauptlumen 3 endet in mehreren seitlichen Öffnungen. Das vordere Katheterende 5 ist geschlossen und abgerundet. Zur Sicherung der Haftung der angespritzten Katheterspitze 1 am Katheterrohr 2 ist bei der Herstellung des Katheterrohres 2 in einem vom Hauptlumen 3 abgetrennten zweiten Lumen 6 oder in der Wand des Katheterrohres 2 eine Sicherungsfaser 7 oder ein Faserbündel angeordnet worden, dessen Ende über das Ende des Katheterrohres 2 hinausragt. Bei endlos mit eingelegter Sicherungsfaser hergestellten Katheterrohren kann nach dem Aufteilen auf die gewünschten Längen ein Teilstück des Kathetermaterials an einem Ende des Abschnittes entfernt werden, so dab ein Stück der Sicherungsfaser über das Ende des Katheterrohres 2 zum Einbetten in die Katheterspitze 5 hinausragt. Am Ende der Sicherungsfaser 7 ist deren Volumen ourch Anbringen eines Endstückes 8 vergröbert, das in das nachtraglich ourch Spritzgießen angeformte Katheterende 5 eingebettet ist. Das Enostuck kann verscniedene Formen haben, entscheidend ist die Volumenvergroßerung des Endes und die feste Verbindung mit oer Sicnerungsfaser oder dem Sicherungsfaserbündel. Bevorzugt ist das Endstuck kugelförmig, zylindriscn, scheibenförmig, quaderförmig, ellipsoid oder kegelförmig ausgebildet. Durch die Sicherungsfaser 7 mit dem in das Katheterende 5 eingebettete Endstück 8 ist die Verbindungsstelle 9 zwischen Katheterrohr 2 und angeformtem Katheterende 5 gegen unerwünschtes Aolösen der Spitze gesichert.Fig. 1 shows in longitudinal section the tip 1 of a catheter, which was subsequently attached to a multi-lumen catheter tube 2 by injection molding. The main lumen 3 ends in several lateral openings. The front catheter end 5 is closed and rounded. To ensure the adhesion of the injection-molded catheter tip 1 to the catheter tube 2, a securing fiber 7 or a fiber bundle, the end of which over the end of the catheter tube, has been arranged in the manufacture of the catheter tube 2 in a second lumen 6 separated from the main lumen 3 or in the wall of the catheter tube 2 2 protrudes. In the case of catheter tubes produced endlessly with inserted securing fiber, a section of the catheter material can be removed at one end of the section after being divided into the desired lengths, so that a piece of the securing fiber projects beyond the end of the catheter tube 2 for embedding in the catheter tip 5. At the end of the securing fiber 7, its volume is coarsened by attaching an end piece 8 which is embedded in the catheter end 5 which is subsequently molded by injection molding. The Enostuck can take various forms The decisive factor is the increase in volume of the end and the firm connection with the security fiber or the security fiber bundle. The end piece is preferably spherical, cylindrical, disk-shaped, cuboid, ellipsoidal or conical. The securing fiber 7 with the end piece 8 embedded in the catheter end 5 secures the connection point 9 between the catheter tube 2 and the integrally formed catheter end 5 against undesired loosening of the tip.
In Fig. 1 verlauft die Verbindungsfläche 9 zwischen dem Katheterrohr 2 und dem angeformten Katheterende 5 rechtwinklig zur Längsachse des Katheters. Zur Vergrößung der Verbindungsflachen Kann das Katheterrohr 2 beim Teilen langer Kohrstucke auf die gewünschte Lange aucn mit einer schräg zur Achse verlaufenden Verbindungsfläche versehen oder beim Freilegen des Endes der Sicnerungsfaser 7 eine schräg verlaufende Verbindungsfläche hergestellt werden. Entsprechend abgeschrägt wird die Verbindungsflache des anzuspritzenden Katheterendes 5 mit einem derart ausgebildeten Werkzeug ausgebildet. Möglich ist auch eine stufenförmige Ausbildung des Endes des Katheterrohres 2, diese ist jedoch wegen des zusätzlich erforderlichen Bearoeitungsschrittes nicht bevorzugt.In Fig. 1, the connecting surface 9 between the catheter tube 2 and the molded catheter end 5 extends at right angles to the longitudinal axis of the catheter. To enlarge the connecting surfaces, the catheter tube 2 can also be provided with a connecting surface that extends obliquely to the axis when dividing long pieces of pipe to the desired length, or an oblique connecting surface can be produced when the end of the fiber 7 is exposed. The connecting surface of the catheter end 5 to be injection molded is correspondingly bevelled with a tool designed in this way. A stepped design of the end of the catheter tube 2 is also possible, but this is not preferred because of the additional processing step required.
Fig. 2 zeigt im Längsschnitt die angetormte Spitze 1 des Katheters mit einem zur Spitze offenen Hauptlumen 3. Die Sicherungsfaser 5 ist in einem zweiten Lumen 6 seitlich neoen dem Hauptlumen 3 angeordnet und weist an dem in die angeformte Spitze 5 eingebetteten Ende ein gegenüber dem Durchmesser de r Faser vergrößertes Endstück 8 auf. Bei der in Fig. 2 gezeigten Ausführungsform ist aas Endstück 8 in der Spitze 5 so weit exzentrisch zur Achse des Katheters angeordnet, daß ein Teil der überfläche des Endstückes nicht mehr vom Mandmaterial Dedeckt ist. Eine solche Anordnung des Endstückes 8 ist dann bevorzugt, wenn das Endstück gleicnzeitig als Meßwertaufnehmer ausgebildet ist. Die Sicherungsfaser 7 schliebt bei einer solchen konstruk tiven Gestaltung die Anschluß- und Versorgungsleitung des Meßwertaufnehmers ein.2 shows in longitudinal section the molded tip 1 of the catheter with a main lumen 3 open to the tip. The securing fiber 5 is arranged in a second lumen 6 laterally to the main lumen 3 and has an end that is embedded in the molded tip 5 with a diameter de r fiber enlarged end piece 8. In the embodiment shown in FIG. 2, the end piece 8 is arranged in the tip 5 so eccentrically to the axis of the catheter that part of the surface of the end piece is no longer covered by the mandrel material. Such an arrangement of the end piece 8 is preferred if the end piece is simultaneously designed as a measuring sensor. The securing fiber 7 slips in such a construct tive design of the connection and supply line of the transducer.
Bei der in Fig. 3 im Längsschnitt wiedergegebenen konstruktiven Gestaltung der angeformten Katheterspitze 1 ist die Sicherungsfaser 7 an der Innenwand des Katheterrohres 2 angeordnet und nicht vom Hauptlumen 3 besonders abgetrennt. Das Endstück 8 an der Sicherungsfaser 7 ist als ein Ring ausgebildet, der in das angeformte Endteil 5 eingebettet ist. Wenn der Ring 8 beispielsweise aus einem Material besteht, das unter Röntgenstrahlen Kontrast ergibt, erlaubt diese Ausfuhrungsform die Ortung des eingeführten Katheterendes. Bei Verwendung eines ringförmigen Meßwertaufnehmers als Endstuck 8 an den als Sicherungsfaser dienenden Versorgungs- und Zuführungsleitungen zum Hebwertaufnehmer wird der Ring innerhalb des Endstückes 5 so angeordnet, daß die Sensorflache nicht vom Polymermaterial bedeckt, sondern frei ist und sich beispielsweise an der Außenooerflache des Endteiles 5 befindet.3, the securing fiber 7 is arranged on the inner wall of the catheter tube 2 and is not particularly separated from the main lumen 3. The end piece 8 on the securing fiber 7 is designed as a ring which is embedded in the integrally formed end part 5. If the ring 8 is made, for example, of a material that produces contrast under X-rays, this embodiment allows the insertion of the inserted catheter end. When using an annular transducer as an end piece 8 on the supply and supply lines serving as a securing fiber to the lifting transducer, the ring is arranged within the end piece 5 such that the sensor surface is not covered by the polymer material, but is free and is located, for example, on the outer surface of the end part 5 .
Zum Anformen oes Endteils sind insbesondere thermoplastische Kunststoffe geeignet. Dazu genoren Polyvinylchlorid, Polyethylen, Polypropylen, Polyurethane, Polyamide, Polyester, Polycaroonate, Polystyrole, Siliconelastomere und syntnetiscne Kautschuke sowie neben Homopolymeren auch Copolymere. Die Kunststoffmaterialien sind medizinisch verträglich, so daß die erfindungsgemäßen Katheter auch dauerhaft implantiert werden können. Thermoplastic materials are particularly suitable for molding on the end part. These include polyvinyl chloride, polyethylene, polypropylene, polyurethanes, polyamides, polyesters, polycaroonates, polystyrenes, silicone elastomers and synthetic rubbers as well as copolymers in addition to homopolymers. The plastic materials are medically compatible, so that the catheters according to the invention can also be permanently implanted.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Katneter mit distal angeformter Katheter spitze (1), d a d u r c h g e k e n n z e i c h n e t , daß in der Wand des Katheterrohres (2) oder in einem Lumen (3, b) des Katheterrohres (2) eine Sicherungsfaser oder ein Sicnerungsfaserbundel (7) angeordnet ist, oeren über das Ende des Katheterronres (2) hinausragendes Ende in das durch Spritzgießen an das Katheterrohr (2) angeformte Katheterende (5) aus Polymermaterial eingebettet ist.1. Catheter with distally formed catheter tip (1), characterized in that in the wall of the catheter tube (2) or in a lumen (3, b) of the catheter tube (2) a securing fiber or a bundle of security fibers (7) is arranged over the end of the catheter tube (2) protruding end is embedded in the catheter end (5) made of polymer material by injection molding onto the catheter tube (2).
2. Katheter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dab das vordere Ende der Sicnerungsfaser oder des - faserbundeis (7) im Volumen vergröbert ist. 2. The catheter according to claim 1, which also means that the front end of the security fiber or fiber bundle ice (7) is coarsened in volume.
3. Katheter nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dab die Volumenvergroberung des Endes der Sicherungsfaser durch einen Knoten in der Nahe des Faserendes oder durch Auftrennen des Sicnerungsf aserbundels (7) in Einzelfasern realisiert ist.3. Catheter according to claim 2, d a d u r c h g e k e n n z e i c h n e tab that the volume coarsening of the end of the securing fiber is realized by a node near the fiber end or by separating the Sicnerungsfaser bundle (7) into individual fibers.
4. Katheter nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dab am Enoe der Sicherungsfaser oder des - faserbundels (7) zur Volumenvergrößerung des Endes ein kugelförmiges, zylindrisches, kegelförmiges, pyramidenförmiges, scheibenförmiges oder ellipsoides Endstuck (6) vorhanden ist, das fest mit der Sicherungsfaser (7) oder dem Sicherungsfaserbundel verbunden ist.4. Catheter according to claim 2, characterized in that a spherical, cylindrical, conical, pyramid-shaped, disk-shaped or ellipsoidal end piece (6) is present on the enoe of the securing fiber or the fiber bundle (7) for increasing the volume of the end, which is fixed to the securing fiber ( 7) or the security fiber bundle is connected.
5. Katheter nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dab das Volumen der Sicherungsfaser oder des Sicherungsfaserbundels (7) durch einen am Faserende befestigten Ring5. Catheter according to claim 2, d a d u r c h g e k e n n z e i c h n e t dab the volume of the securing fiber or the securing fiber bundle (7) by a ring attached to the fiber end
(8) vergröbert ist. (8) is coarsened.
6. Katheter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Sicherungsfaser oder das Sicherungsfaseroündel aus Glas, Metall, Kunststoff oder Kohlenstoff oder einer Mischung von Einzelfasern aus diesen Werkstoffen ist.6. Catheter according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the securing fiber or the securing fiber bundle is made of glass, metal, plastic or carbon or a mixture of individual fibers made of these materials.
7. Katheter nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß aas an der Sicherungsfaser oder dem Sicherungsfaseröündel (7) befestigte Endstück (8) aus Glas, Metall , Kunststoff oder Kohlenstoff ist.7. Catheter according to claim 4, d a d u r c h g e k e n n z e i c h n e t that aas on the securing fiber or the securing fiber bundle (7) attached end piece (8) made of glass, metal, plastic or carbon.
8. Katheter nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß das Endstück (8) ein Meßwertaufnehmer ist und das8. Catheter according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the end piece (8) is a transducer and that
Sicherungsfaseroündel (7) die Anschluß- und Versorgungsleitung des Mebwertaufnehmers enthält und das Endstuck (8) in dem angespritzten Katheterende (5) so angeordnet ist, daß die Sensorflacne des Meßwertaufnehmers an der Außenooerflache des Katheterendes (5) angeordnet und nicht von Polymermaterial oedeckt ist.Security fiber bundle (7) contains the connection and supply line of the transducer and the end piece (8) in the molded catheter end (5) is arranged so that the sensor sheet of the transducer is arranged on the outer surface of the catheter end (5) and is not covered by polymer material.
y. Katheter nacn Ansprucnen 1 bis 8, d a d u r c h g e k e n n z e i c h n e t , daß das Polymermaterial des angespritzten Katheterendes (5) im gleichen Temperaturbereich thermoplastisch wird, wie das Polymere ooer Copolymere des Katheterrohres. Ende des Katheterrohres (2) hinausragendes Ende in das durch Spritzgießen an das Katheterronr (2) angeformte Katheterende (5) aus Polymermaterial eingebettet ist. y. Catheter according to claims 1 to 8, so that the polymer material of the molded catheter end (5) becomes thermoplastic in the same temperature range as the polymer or copolymer of the catheter tube. End of the catheter tube (2) protruding end is embedded in the catheter end (5) made of polymer material by injection molding onto the catheter tube (2).
EP19890904554 1988-04-13 1989-04-10 Catheter with distally moulded-on catheter point and securing fibre Withdrawn EP0410994A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812188 1988-04-13
DE19883812188 DE3812188C1 (en) 1988-04-13 1988-04-13

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EP (1) EP0410994A1 (en)
JP (1) JPH03504447A (en)
DE (1) DE3812188C1 (en)
WO (1) WO1989009634A1 (en)

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US5569184A (en) * 1992-04-29 1996-10-29 Cardiovascular Dynamics, Inc. Delivery and balloon dilatation catheter and method of using
US5299571A (en) * 1993-01-22 1994-04-05 Eli Lilly And Company Apparatus and method for implantation of sensors
US5509910A (en) * 1994-05-02 1996-04-23 Medtronic, Inc. Method of soft tip attachment for thin walled catheters
US6245053B1 (en) 1998-11-09 2001-06-12 Medtronic, Inc. Soft tip guiding catheter and method of fabrication
US7758624B2 (en) 2000-11-13 2010-07-20 C. R. Bard, Inc. Implant delivery device
DE19954330C2 (en) * 1999-11-11 2002-12-05 Angiomed Ag Stent delivery system for delivery of flexible stents
JP6558773B2 (en) * 2015-10-27 2019-08-14 朝日インテック株式会社 catheter
JP6782510B2 (en) * 2019-07-10 2020-11-11 朝日インテック株式会社 catheter
JP2022166871A (en) * 2021-04-22 2022-11-04 朝日インテック株式会社 catheter

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US2688329A (en) * 1953-03-19 1954-09-07 American Cystoscope Makers Inc Catheter
US3690323A (en) * 1970-12-01 1972-09-12 Us Army Device for draining ventricular fluid in cases of hydrocephalus
DE2541919A1 (en) * 1975-09-19 1977-03-24 Hoffmann Klaus Intestinal probe for enteral admin. of fluids and draining secretions - has soft tube with enlarged head portion and flexible guide element
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DE3812188C1 (en) 1989-05-03
WO1989009634A1 (en) 1989-10-19

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