WO1989009633A1 - Catheter a plusieurs lumens - Google Patents

Catheter a plusieurs lumens Download PDF

Info

Publication number
WO1989009633A1
WO1989009633A1 PCT/EP1989/000384 EP8900384W WO8909633A1 WO 1989009633 A1 WO1989009633 A1 WO 1989009633A1 EP 8900384 W EP8900384 W EP 8900384W WO 8909633 A1 WO8909633 A1 WO 8909633A1
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
lumen
end region
catheter tube
opening
Prior art date
Application number
PCT/EP1989/000384
Other languages
German (de)
English (en)
Inventor
Raymond Glocker
Michael Greive
Original Assignee
Raymond Glocker
Michael Greive
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 Raymond Glocker, Michael Greive filed Critical Raymond Glocker
Publication of WO1989009633A1 publication Critical patent/WO1989009633A1/fr

Links

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
    • A61M25/0067—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
    • A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • 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
    • A61M25/0021—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
    • A61M25/003—Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves

Definitions

  • the subject matter of the invention is a menstrual catheter with a specially designed end region, which is formed by molding and has a lateral opening for receiving transducers.
  • a probe with pH electrodes is known with a two-lumen catheter, at the tip of which a metal electrode and a diaphragm are arranged above it.
  • a wick is arranged in one of the lumens, which enables an electrical bridge between the diaphragm and an external reference electrode.
  • micro-tip catheters are increasingly being used for improved diagnosis of the cardiovascular system, at the tip or in the end area of which measurement transducers are arranged in order to determine "on-line” mechanical, electrical or biochemical data.
  • the Hess signals are forwarded via connecting lines, for example cables and / or light guides, which are routed in separate lumens to the rear end of the catheter.
  • the energy supply for the transducers is also provided by the connection and supply line. From the rear end of the catheter, the lines are routed to corresponding facilities.
  • EP-A-074 114 describes a multi-lumen catheter, the lumens of which are separated from one another by partition walls running parallel to the longitudinal axis of the catheter tube.
  • the main lumen is arranged eccentrically to the longitudinal axis of the catheter tube and ends at the tip of the catheter. At a distance from the tip there is a lateral opening in the wall of the catheter tube. A second catheter chamber ends in front of the side opening in the catheter wall. The catheter tip is attached to the catheter tube with the help of epoxy resin adhesive.
  • the sensors are also cemented.
  • the object of the invention is to provide a multi-lumen catheter whose end area is designed in such a way that it is possible and guaranteed to correctly position and fasten transducers in the end area.
  • This object is achieved by a multi-lumen catheter whose lumens are separated from one another by partitions running parallel to the longitudinal axis of the catheter tube, the main lumen of which ends at the open catheter tip and a lateral opening is provided in the wall of the catheter tube at a distance from the catheter tip.
  • the characteristic is that in the region of the front end of the catheter the main lumen is arranged eccentrically to the longitudinal axis of the catheter tube and the lateral opening in the catheter tip is arranged in this area in the wall part with the greatest material and the opening is undercut by the Expansion of the lateral opening in the wall area next to the outer surface of the catheter is smaller than in the radially inward adjoining wall area which adjoins the main lumen and that a second lumen ends in the wall piece of the lateral opening. It is particularly preferred to retrofit this end region of the catheter to prefabricated, multi-walled catheter tubes by molding by means of injection molding or injection blowing.
  • the wall of the catheter tube at the side opening in the part facing away from the catheter tip and facing the catheter tube arranged in front of the end region is wider than undercuts in the remaining part of the side opening.
  • the second lumen ends in the edge portion of the side opening that is adjacent to the outer surface.
  • the second lumen ends in the undercut edge of the side opening that is adjacent to the main lumen.
  • Another embodiment is characterized in that the second lumen at its end in the edge piece of the lateral opening has an open connection both with the undercut edge piece and with the edge piece adjacent to the outer surface.
  • a polymer material is selected for the front end area of the catheter, the softening point of which lies at the same temperature range as that of the polymer material of the catheter tube .
  • the same plastics that are used for the multi-layer catheter tubes can be used for the end area of the catheter.
  • a tool is used with a core for keeping the main lumen open, which extends into the main lumen in the catheter tube to which the end area is molded.
  • the cross-section of the core changes continuously in the transition area from the end area to be molded to the catheter tube and enables the penetration of polymer material of the molded end area into the main lumen of the immediately adjacent th part s of the catheter tube, so that a stepless transition of the main lumen from the catheter tube to the molded end region is formed.
  • This inflow of polymer material into the main space of the catheter tube gives the additional advantage of a larger adhesive surface between the polymer material of the molded end region and the polymer material of the catheter tube and thereby a stronger connection of the catheter tube to the molded end region.
  • the inventive design of the end region of the catheter with a lateral opening in the wall enables the arrangement of one or more transducers in the lateral opening, the second lumen or, if necessary, several lumens with a narrower cross section than the main lumen as the channel serves to accommodate the connection and connecting lines of the sensor.
  • transducer or transducers it is very particularly preferred to connect the transducer or transducers to the connecting and connecting lines and, at the same time, to embed them in the polymer material with the forms of the end region on the catheter tube, where the lateral opening in the wall of the catheter tube keeps the sensitive areas of the transducer free. Embedding the transducers while molding the end area ensures an exact and reproducible arrangement of the transducers in the catheter. In the case of several transducers, one transducer is preferably also already greased during the molding process, and the further transducers are then attached to this embedded transducer.
  • FIG. 1 shows in longitudinal section the end region (8) formed on the multi-layer catheter tube with the main lumen (1) and a second lumen (6) separated from it.
  • the main lumen (1) ends at the open catheter tip (2).
  • the main lumen is arranged eccentrically in the end region (8) of the catheter and possibly changed and / or reduced in cross section.
  • the opening (3) is undercut, ie the dimension or diameter (4) of the opening (3) in the edge piece (7), which is adjacent to the outer surface, is smaller than the extent of the opening in the radially inward adjacent edge piece (5) next to the main lumen (1).
  • the second lumen (6) ends in the illustrated embodiment of the end region (8) of the catheter in the edge piece 7.
  • Figure 2 shows the cross section of the multi-lumen catheter tube along the line A-A of Figure 1 with the main lumen (1) and the second lumen (6) separated by a wall.
  • the main lumen (1) can be divided into two lumens by inserting, for example, a further partition.
  • Such a division of the lumens is also possible for certain requirements for the second lumen (6), in particular if a plurality of transducers are to be introduced into the lateral opening.
  • FIG. 3 shows the cross section of the multilayer catheter tube in the piece of the catheter tube which is directly adjacent to the molded end region.
  • the main lumen (1) is narrowed in cross section in this transition region between the line AA of FIG. 1 and the integrally formed end region (8) of FIG. 1 by polymer material (9) introduced into the main lumen (1) when the end region is formed, where a continuous transition takes place of the main lumen (1) is designed in the shape of the cross section to the shape and eccentric position of the main lumen (1) in the molded end region.
  • Figure 4 shows the cross section of the catheter in the end region along the line 3-B of Figure 1 and shows the formation of the side opening in detail.
  • the main room (1) is arranged eccentrically to the longitudinal axis net and has a round cross-section.
  • the side opening (3) is formed in the wall area with the larger material thickness on the side opposite the main lumen (1) from the longitudinal axis.
  • the opening (3) is undercut, ie the dimension of the opening in the edge part (4) of the opening (3) adjacent to the outer surface is smaller than the extent of the edge part (5) adjacent in the radial direction of the longitudinal axis.
  • the partition that divides the main lumen (1) from the other lumens is also continuous in the area of the lateral opening (3) of the catheter end area (8).
  • the lateral opening (3) then only has open connections to the second lumen (6) or, in the case of several supply channels, to the divided second lumens.
  • the subsequent shaping of the end region and the catheter tip to a multi-layer catheter tube is particularly advantageous because precision injection molding, in which the transducers are attached and embedded at the same time as the shaping, ensures correct placement of the transducers and is inexpensive.
  • the end region and the catheter tip can be made of softer or more elastic polymer material than the catheter shaft in comparison to the catheter tube. It is essential that the polymer materials of the catheter shaft and the end region are compatible with one another and adhere to one another sufficiently firmly. This can be achieved in particular in that either the same plastics are used or polymer materials with approximately the same temperature range of softening, so that a permanent and firm connection is achieved when molding in the thermoplastic state.
  • the suitable polymers or copolymers are medically compatible thermoplastic materials such as polyvinyl chloride, polyethylene, polypropylene, polyurethanes, polyamides, polyesters, polycarbonates, silicone elastomers, synthetic rubbers, where both homopolymers and copolymers can be used.
  • thermoplastic materials such as polyvinyl chloride, polyethylene, polypropylene, polyurethanes, polyamides, polyesters, polycarbonates, silicone elastomers, synthetic rubbers, where both homopolymers and copolymers can be used.
  • such cores have a crescent-shaped cross section in the part of the core which extends into the catheter shaft, a continuous transition from the crescent-shaped cross section to the round cross section in the end region and its eccentric position being formed in the piece directly adjacent to the end region of the catheter to be molded. Due to the appropriately designed transition area of the injection molding tool and the core, a connection between the end area and the shaft can be formed not only in the radial direction but also in the longitudinal direction to the catheter axis, where polymer material of the integrally formed end area can penetrate into the shaft. This increases the resilience due to tension in the axial direction of the catheter.
  • the undercut of the lateral opening in the end area of the catheter results in a safe embedding and fastening of the measurement transducers, in particular if they are also embedded directly when the end area is formed. In principle, however, it is also possible to subsequently insert the measurement transducers into the lateral opening in the end region of the catheter, in particular if the elasticity of the polymer material enables a press fit. In such a case, the extent of the lateral opening is made slightly smaller than the extent of the transducer.
  • a two-lumen catheter tube with an outer diameter of 2.3 mm and an inner diameter of 1.7 mm has a partition wall of 0.3 mm thickness running eccentrically to the longitudinal axis for separating the main lumen from a second lumen. Both lumens have a cross section in the form of a circle segment, the depth of the circle segment of the smaller lumen being 0.4 mm.
  • the main lumen has a round cross-section with a diameter of 1 mm and is arranged eccentrically to the longitudinal axis, with the outer wall thickness at the narrowest point still being 0.3 mm.
  • a 5 mm long and 0.8 mm wide lateral opening is formed in the catheter wall, which is about 1 mm thick in this piece.
  • the opening can in principle be round, oval or square and is adapted to the shape and size of the sensor or sensors. Starting at a depth of 0.5 mm from the outer surface, the opening is undercut along its edge by approximately 0.1 mm, ie the extent in this edge piece of the opening is roughly 0.2 mm larger than that adjacent to the outer surface Edge part.
  • the second lumen can end in the edge part of the opening, which is the outer surface, or in the undercut edge part l. It is particularly preferred at the end of the second lumen to expand the undercut width by up to 1 mm and to form an opening in the second lumen in the undercut area for carrying out connection and supply lines to the measurement sensor or sensors.
  • the eccentric position of the main space can be reduced again between the actual catheter tip and the lateral opening in the catheter wall, so that a concentric position of the main space is formed at the tip.

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

Cathéter à plusieurs lumens dont les lumens sont séparés par des parois de séparation parallèles à l'axe longitudinal du tube du cathéter. Le lumen principal (1) se termine dans la pointe ouverte du cathéter (2); il est agencé dans la partie ajoutée par moulage (8) de l'extrémité avant du cathéter de manière excentrique par rapport à l'axe longitudinal du tube du cathéter. Une ouverture latérale (3) dans cette partie d'extrémité (8) est agencée dans la partie la plus épaisse de la paroi et découpée en gradins, la largeur de l'ouverture latérale (3) dans la partie de la paroi (4) proche de la surface extérieure du cathéter étant inférieure à la partie de la paroi qui lui est radialement contiguë en allant vers l'intérieur (5), qui est adjacente au lumen principal (1), et un second lumen (6) se terminant dans le bord (7) de l'ouverture latérale (3). Cette ouverture latérale permet de fixer un ou plusieurs transducteurs sur le cathéter.
PCT/EP1989/000384 1988-04-13 1989-04-10 Catheter a plusieurs lumens WO1989009633A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3812187.5 1988-04-13
DE19883812187 DE3812187A1 (de) 1988-04-13 1988-04-13 Mehrlumiger katheter

Publications (1)

Publication Number Publication Date
WO1989009633A1 true WO1989009633A1 (fr) 1989-10-19

Family

ID=6351835

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1989/000384 WO1989009633A1 (fr) 1988-04-13 1989-04-10 Catheter a plusieurs lumens

Country Status (4)

Country Link
EP (1) EP0409872A1 (fr)
JP (1) JPH03503731A (fr)
DE (1) DE3812187A1 (fr)
WO (1) WO1989009633A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5246016A (en) * 1991-11-08 1993-09-21 Baxter International Inc. Transport catheter and multiple probe analysis method
US5569215A (en) * 1993-06-24 1996-10-29 Cardiovascular Dynamics, Inc. Low profile infusion catheter
US5795326A (en) * 1997-01-29 1998-08-18 Baxter International Inc. Double lumen tubing design for catheter
US5968009A (en) * 1997-01-29 1999-10-19 Baxter International Inc. Double lumen tubing design for catheter
US11464485B2 (en) 2018-12-27 2022-10-11 Avent, Inc. Transducer-mounted needle assembly with improved electrical connection to power source
US11647980B2 (en) 2018-12-27 2023-05-16 Avent, Inc. Methods for needle identification on an ultrasound display screen by determining a meta-frame rate of the data signals

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515435B1 (fr) * 1990-02-16 1996-01-31 Unilever Plc Produits de nettoyage liquides
US5382234A (en) * 1993-04-08 1995-01-17 Scimed Life Systems, Inc. Over-the-wire balloon catheter
DE19738942A1 (de) 1997-09-05 1999-03-25 Pulsion Verwaltungs Gmbh & Co Verfahren und Vorrichtung zur Injektionszeitpunkt- und Injektionsdauerbestimmung bei Thermodilutionsmessungen
JP4223798B2 (ja) * 2002-12-19 2009-02-12 川澄化学工業株式会社 薬液注入カテーテル及びバルーンカテーテルの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH338928A (de) * 1955-01-28 1959-06-15 Hauke Rudolf Sonde mit ph-Elektroden
WO1981003733A1 (fr) * 1980-06-18 1981-12-24 American Hospital Supply Corp Catheter regulateur de pression a canaux multiples et procede de montage d'un element electrique a l'interieur de celui-ci
EP0074114A1 (fr) * 1981-09-08 1983-03-16 Brown University Research Foundation Cathéter
EP0080680A2 (fr) * 1981-11-27 1983-06-08 Sentron v.o.f. Cathéter avec électrode de référence

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH338928A (de) * 1955-01-28 1959-06-15 Hauke Rudolf Sonde mit ph-Elektroden
WO1981003733A1 (fr) * 1980-06-18 1981-12-24 American Hospital Supply Corp Catheter regulateur de pression a canaux multiples et procede de montage d'un element electrique a l'interieur de celui-ci
EP0074114A1 (fr) * 1981-09-08 1983-03-16 Brown University Research Foundation Cathéter
EP0080680A2 (fr) * 1981-11-27 1983-06-08 Sentron v.o.f. Cathéter avec électrode de référence

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5246016A (en) * 1991-11-08 1993-09-21 Baxter International Inc. Transport catheter and multiple probe analysis method
US5833645A (en) * 1991-11-08 1998-11-10 Baxter International Inc. Method of use of a transport catheter
US5569215A (en) * 1993-06-24 1996-10-29 Cardiovascular Dynamics, Inc. Low profile infusion catheter
US6027487A (en) * 1993-06-24 2000-02-22 Radiance Medical Systems, Inc. Low profile infusion catheter
US5795326A (en) * 1997-01-29 1998-08-18 Baxter International Inc. Double lumen tubing design for catheter
US5968009A (en) * 1997-01-29 1999-10-19 Baxter International Inc. Double lumen tubing design for catheter
US11464485B2 (en) 2018-12-27 2022-10-11 Avent, Inc. Transducer-mounted needle assembly with improved electrical connection to power source
US11647980B2 (en) 2018-12-27 2023-05-16 Avent, Inc. Methods for needle identification on an ultrasound display screen by determining a meta-frame rate of the data signals

Also Published As

Publication number Publication date
DE3812187C2 (fr) 1990-04-26
DE3812187A1 (de) 1989-10-26
JPH03503731A (ja) 1991-08-22
EP0409872A1 (fr) 1991-01-30

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