WO2008060142A1 - Procédé de fabrication d'un cathéter - Google Patents

Procédé de fabrication d'un cathéter Download PDF

Info

Publication number
WO2008060142A1
WO2008060142A1 PCT/NL2007/000282 NL2007000282W WO2008060142A1 WO 2008060142 A1 WO2008060142 A1 WO 2008060142A1 NL 2007000282 W NL2007000282 W NL 2007000282W WO 2008060142 A1 WO2008060142 A1 WO 2008060142A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
housing
basic body
mould
electrode housing
Prior art date
Application number
PCT/NL2007/000282
Other languages
English (en)
Inventor
Gheorghe Aurel Marie Pop
Original Assignee
Martil Instruments B.V.
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 Martil Instruments B.V. filed Critical Martil Instruments B.V.
Publication of WO2008060142A1 publication Critical patent/WO2008060142A1/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
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/02—Details
    • A61N1/04—Electrodes
    • A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode

Definitions

  • the invention relates to a method for making a catheter and a catheter made with this method.
  • It relates particularly to a catheter with one or more electrodes at the distal end.
  • An electric connecting line of each of these electrodes which are for instance annular, must be led from the tip of the catheter through the basic body and to the proximal end.
  • the connection of this line to the electrode is very difficult from a production engineering viewpoint.
  • a stripped end of the electrical conductor is first pulled outward from inside, for instance from a lumen, and a number of winds are laid on the bottom of a groove in a part of the catheter.
  • An annular electrode is then crimped into this groove at this position, so creating an electrical connection in that the material of the electrode makes contact with the material of the electrical conductor.
  • the sides of the ring must then be sealed in order to prevent material, such as liquids, being able to penetrate under the electrode ring.
  • the invention now relates to a method for making a catheter as specified above which can be performed more efficiently.
  • an electrode housing is provided for the catheter, which housing comprises a prismatic part in the surface of which a number of grooves is formed.
  • the electrical conductor of an electrode is connected to this latter by welding or soldering a short, stripped part fixedly to an inner surface of the electrode.
  • the conductor extends here in axial direction relative to the electrode.
  • the electrode which can for instance be annular, can then slide onto the housing, wherein the conductor slides through one of the grooves of the housing.
  • a plurality of electrodes are applied they can slide successively onto the electrode housing, wherein a different groove is chosen in each case for the relevant conductor.
  • the first electrode is pushed furthest onto the housing, and the subsequent ones slightly less far in each case.
  • the dimensioning is preferably chosen such that the electrodes slide onto the housing with a certain frictional resistance and thus retain their position once it has been set.
  • the housing with the electrodes thereon is arranged in a mould.
  • the mould cavity is here preferably such that the periphery of the electrodes comes into contact with the wall of the mould cavity.
  • a suitable flexible plastic such as for instance polyurethane or a mixture containing polyurethane, is then injected into the mould cavity.
  • a layer of this plastic, with an outer diameter the same as that of the electrodes, is hereby arranged round the housing.
  • the outer surface of the electrodes herein remains free of plastic and the electrodes can thus continue to fulfil their intended function.
  • the thus obtained end part for a catheter can then be attached to a basic body of a catheter in more or less known manner, for instance by glueing.
  • the one or more conductors are herein received in one or more lumina of the basic body.
  • the transition from the catheter tip to the basic body is finished in usual manner such that a smooth transition is obtained.
  • the catheter housing can comprise a transition part connecting to the prismatic part, wherein the grooves for instance taper gradually toward the end to one position coinciding with the position of a lumen in the basic body.
  • One or more lumina can also be formed in the electrode housing which are brought into connection with corresponding lumina in the basic body in a uniform manner via the transition part. A liquid can for instance be supplied via these lumina .
  • the electrode housing with the one or more electrodes arranged thereon is arranged against the end of the basic body before the injection moulding process.
  • the conductors are received for this purpose in the lumina arranged for the purpose in the basic body, and the basic body is pushed against the housing over these conductors.
  • the catheter housing and the end part of the catheter lying thereagainst are then arranged in a suitable mould, which has a mould cavity which fits closely onto the periphery of the basic body of the catheter and onto the periphery of the electrode.
  • the remaining mould space is then filled by injection with a suitable plastic, which provides for the finishing of the catheter end to a fully prismatic part and the connection of the housing to the end of the basic body.
  • the catheter and housing comprise one or more lumina, they can be temporarily filled with a core pin during the injection moulding process in order to prevent the plastic penetrating these lumina.
  • annular electrodes are recommended, the method and the catheter are not limited to embodiments with such annular electrodes.
  • the electrodes can for instance be shell-like and be provided with inward protruding profile parts which engage in two opposite grooves in the electrode housing. An electrode can thus be applied with an electrode surface which is effective only over a portion of the periphery.
  • annular electrode it is also possible in such a case to use an annular electrode but to have the outer surface thereof recessed to some extent over part of the periphery, whereby after the injection moulding a layer of the injected plastic will come to lie over this recessed part and only the other part of the electrode thus remains free .
  • the mould can be suitably dimensioned such that the mould cavity clampingly encloses the electrodes.
  • Another option is to arrange positioning elements in the mould which are formed for instance by shell-like magnets in each of the mould halves, which shell-like magnets form rings in the closed form of the mould.
  • the electrode rings can in this way be properly fixed in the mould.
  • Figure 1 shows a perspective view with cut-away parts of an end part of a catheter made with the method according to the invention.
  • Figure 2 shows a view with exploded parts of the end part of figure 1.
  • Catheter 1 comprises a basic body 2, only a very small portion of which is shown. At the left-hand end seen in figure 1 the basic body extends further over a considerable length to the proximal end of the catheter.
  • Numeral 3 designates the tip part.
  • this comprises an electrode housing 4 on which four electrodes 6, 7, 8, 9 are arranged.
  • each of these electrodes 6-9 is connected to a respective conductor 11-14.
  • the relevant conductor is stripped at its end, i.e. stripped of insulating material and connected by welding or soldering to the inside of the annular electrode.
  • Electrodes 6-9 are then pushed onto electrode housing 4.
  • This electrode housing 4 comprises a prismatic part which is provided with a number of grooves 15 for receiving in each case one of the conductors 11-14. It will be apparent that the most distal electrode, in this case 9, is pushed first onto housing 4, followed by 8 adjacently thereof and then 7 and 6.
  • the dimensioning of the electrode housing and the electrodes is preferably such that the annular electrodes can slide over electrode housing 4 with a light clamp fit, or in any case with a certain resistance, so that once they have been placed in their position they remain there.
  • a small ridge can optionally be formed on the inner side of the electrode and can fall into a groove formed in the housing.
  • the thus formed assembly of electrode housing with electrodes and conductors connected thereto is arranged in an injection mould, into which is then injected a suitable plastic which fills the contour up to the contour indicated with line 5 in figure 1.
  • the electrode housing can co-act or be formed integrally with a transition part 14, in which are formed lumina 17, 18 which connect between the lumina in the basic body and those in the housing. It is also possible to insert the conductors directly into the lumina in basic body 2 intended for the purpose and to incorporate in lumen 16 of the basic body a core wire which extends through lumen 20 in electrode housing 4. This assembly can then be arranged in a mould, wherein the mould cavity is filled with a suitable plastic. Transition part 14 is thus then formed in the same injection moulding operation as the filling between the electrodes. The core wire can be removed after the plastic solidifies, thereby forming the continuous lumen . Not shown in the figures is that a soft, moulded-on tip can also be situated, at the most distal end of the catheter. This is however a per se usual provision.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Cardiology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Pulmonology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Otolaryngology (AREA)
  • Biophysics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un cathéter, qui consiste : à fournir un logement d'électrode comprenant une partie prismatique dans la surface de laquelle sont formées un certain nombre de rainures; à fournir au moins une électrode; à relier un conducteur électrique à chaque électrode, le conducteur électrique s'étendant dans la direction axiale par rapport à l'électrode; à faire coulisser chaque électrode sur le logement d'électrode, le conducteur électrique associé coulissant à travers l'une des rainures du logement; à positionner l'électrode sur le logement d'électrode; à disposer le logement d'électrode coiffé de l'électrode dans la cavité d'un moule; et à disposer autour du logement d'électrode une couche de matière plastique dotée d'un diamètre externe sensiblement identique à celui de l'électrode.
PCT/NL2007/000282 2006-11-13 2007-11-13 Procédé de fabrication d'un cathéter WO2008060142A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1032858 2006-11-13
NL1032858 2006-11-13

Publications (1)

Publication Number Publication Date
WO2008060142A1 true WO2008060142A1 (fr) 2008-05-22

Family

ID=39246839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2007/000282 WO2008060142A1 (fr) 2006-11-13 2007-11-13 Procédé de fabrication d'un cathéter

Country Status (2)

Country Link
NL (1) NL1034686C2 (fr)
WO (1) WO2008060142A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013062863A1 (fr) * 2011-10-28 2013-05-02 Medtronic, Inc. Extrémité de dérivation ayant un élément fendu
US20130144224A1 (en) * 2010-08-13 2013-06-06 Cathrx Ltd Method of fabricating an electrical lead
US9138576B2 (en) 2011-10-28 2015-09-22 Medtronic, Inc. Lead end having inner support
WO2015187361A1 (fr) * 2014-06-07 2015-12-10 Mederi Terapeutics, Inc. Systèmes et procédés de traitement de tissu par de l'énergie radiofréquence
US9421362B2 (en) 2011-10-28 2016-08-23 Medtronic, Inc. Modular lead end
US9675404B2 (en) 2009-09-22 2017-06-13 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
US9750563B2 (en) 2009-09-22 2017-09-05 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
CN107184271A (zh) * 2012-05-07 2017-09-22 圣犹达医疗用品电生理部门有限公司 可偏转导管轴杆节段和包含可偏转导管轴杆节段的导管
US9775664B2 (en) 2009-09-22 2017-10-03 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
US11172841B2 (en) 2017-06-21 2021-11-16 Alandra Medical SAPI DE CV Electrode catheter assembly and method for the manufacture thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996018339A1 (fr) * 1994-12-14 1996-06-20 Arrow International Investment Corp. Catheter portant des electrodes et procede de fabrication
US5855552A (en) * 1994-09-21 1999-01-05 Ep Technologies, Inc. Catheter having ring electrodes secured thereon
WO1999043376A1 (fr) * 1998-02-27 1999-09-02 Ep Technologies, Inc. Catheter electrode a revetement superficiel lie
US20060142652A1 (en) * 2004-12-28 2006-06-29 Erick Keenan Concepts using the improved "composite flexible and conductive catheter electrode bands" and their method of construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5855552A (en) * 1994-09-21 1999-01-05 Ep Technologies, Inc. Catheter having ring electrodes secured thereon
WO1996018339A1 (fr) * 1994-12-14 1996-06-20 Arrow International Investment Corp. Catheter portant des electrodes et procede de fabrication
WO1999043376A1 (fr) * 1998-02-27 1999-09-02 Ep Technologies, Inc. Catheter electrode a revetement superficiel lie
US20060142652A1 (en) * 2004-12-28 2006-06-29 Erick Keenan Concepts using the improved "composite flexible and conductive catheter electrode bands" and their method of construction

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9750563B2 (en) 2009-09-22 2017-09-05 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
US11471214B2 (en) 2009-09-22 2022-10-18 Mederi Rf, Llc Systems and methods for treating tissue with radiofrequency energy
US10363089B2 (en) 2009-09-22 2019-07-30 Mederi Rf, Llc Systems and methods for treating tissue with radiofrequency energy
US10292756B2 (en) 2009-09-22 2019-05-21 Mederi Rf, Llc Systems and methods for treating tissue with radiofrequency energy
US9675404B2 (en) 2009-09-22 2017-06-13 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
US9775664B2 (en) 2009-09-22 2017-10-03 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
US20130144224A1 (en) * 2010-08-13 2013-06-06 Cathrx Ltd Method of fabricating an electrical lead
US9533119B2 (en) * 2010-08-13 2017-01-03 Cathrx Ltd Method of fabricating an electrical lead
US9421362B2 (en) 2011-10-28 2016-08-23 Medtronic, Inc. Modular lead end
US9713705B2 (en) 2011-10-28 2017-07-25 Medtronic, Inc. Modular lead end
US9962539B2 (en) 2011-10-28 2018-05-08 Medtronic, Inc. Modular lead end
US10076657B2 (en) 2011-10-28 2018-09-18 Medtronic, Inc. Lead end having slotted member
WO2013062863A1 (fr) * 2011-10-28 2013-05-02 Medtronic, Inc. Extrémité de dérivation ayant un élément fendu
US10413718B2 (en) 2011-10-28 2019-09-17 Medtronic, Inc. Modular lead end
US9138576B2 (en) 2011-10-28 2015-09-22 Medtronic, Inc. Lead end having inner support
CN107184271A (zh) * 2012-05-07 2017-09-22 圣犹达医疗用品电生理部门有限公司 可偏转导管轴杆节段和包含可偏转导管轴杆节段的导管
WO2015187361A1 (fr) * 2014-06-07 2015-12-10 Mederi Terapeutics, Inc. Systèmes et procédés de traitement de tissu par de l'énergie radiofréquence
US11172841B2 (en) 2017-06-21 2021-11-16 Alandra Medical SAPI DE CV Electrode catheter assembly and method for the manufacture thereof

Also Published As

Publication number Publication date
NL1034686A1 (nl) 2008-05-14
NL1034686C2 (nl) 2008-06-17

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