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WO2014196249A1 - Cathéter muni d'une extrémité pliable - Google Patents

Cathéter muni d'une extrémité pliable Download PDF

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Publication number
WO2014196249A1
WO2014196249A1 PCT/JP2014/059107 JP2014059107W WO2014196249A1 WO 2014196249 A1 WO2014196249 A1 WO 2014196249A1 JP 2014059107 W JP2014059107 W JP 2014059107W WO 2014196249 A1 WO2014196249 A1 WO 2014196249A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor member
catheter
tip electrode
distal end
temperature sensor
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.)
Ceased
Application number
PCT/JP2014/059107
Other languages
English (en)
Japanese (ja)
Inventor
拓也 桝田
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.)
Japan Lifeline Co Ltd
Original Assignee
Japan Lifeline Co Ltd
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 Japan Lifeline Co Ltd filed Critical Japan Lifeline Co Ltd
Publication of WO2014196249A1 publication Critical patent/WO2014196249A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/003—Steerable
    • A61B2017/00318—Steering mechanisms
    • A61B2017/00323—Cables or rods
    • 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
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00791—Temperature
    • A61B2018/00821—Temperature measured by a thermocouple
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
    • A61M2025/015—Details of the distal fixation of the movable mechanical means

Definitions

  • the present invention relates to a tip-deflable catheter, and more specifically, by operating a proximal-side operation unit arranged outside the body, the orientation of the distal end of the catheter inserted into the body cavity can be changed.
  • the present invention relates to a catheter capable of tip deflection operation.
  • the orientation of the distal end of the catheter inserted into the heart (fixed end of the tip electrode) is set to the proximal end of the catheter placed outside the body ( There is a need to change (deflection) the operation unit attached to the rear end or the hand side.
  • the present applicant has a catheter tube, a tip electrode, a leaf spring for swinging, and a pair of operation wires.
  • the distal end of the leaf spring is coupled to the tip electrode, and the distal end of the manipulation wire is connected and fixed to the tip electrode independently of the coupling portion of the distal end of the leaf spring.
  • a catheter capable of tip deflection operation in which a temperature sensor protective tube is connected and fixed to the tip electrode (see Patent Document 1 below).
  • the distal end of the leaf spring is connected and fixed by solder filled in the inner concave portion of the tip electrode, and the distal end of the operation wire is connected to the solder by the solder of the leaf spring. It is connected and fixed independently of the distal end. Further, the temperature sensor protective tube is fixed to the distal end of the leaf spring independently of the connecting portion of the distal end of the leaf spring or by being fixed to the distal end of the leaf spring. Are independently connected and fixed to the tip electrode.
  • the tip electrode constituting the catheter is not only connected to the distal end of the leaf spring but also connected and fixed to the distal end of the operation wire. Therefore, even if the connection between the tip electrode and the distal end of the leaf spring is disconnected, the tip electrode is connected and fixed to the distal end of the operation wire, so that the tip electrode can be effectively prevented from falling off. Can do.
  • the distal end of the manipulation wire is connected to the tip electrode independently of the connecting portion of the distal end of the leaf spring (away from the distal end of the leaf spring). Since the connection wire is fixed, the distal end of the operation wire comes out of the solder filled in the concave portion inside the tip electrode when the operation wire is pulled (the connection with the tip electrode is lost). There is a risk. Therefore, in order to prevent the distal end of the operation wire from coming off from the solder filled in the inner concave portion of the tip electrode, a retaining portion (a large-diameter portion for retaining) is disposed at the distal end of the manipulation wire. ) Or a sleeve-like anchor member made of a material having good wettability with solder (for example, phosphor bronze) is mounted around the distal end of the operation wire.
  • the anchor member attached to each of the distal ends of the pair of operation wires occupies most of the inner recess (internal space) of the tip electrode, and the size of the tip electrode Depending on the (outer diameter of the catheter), the distal end of the temperature sensor protective tube and the lead electrode lead wire cannot be inserted into the inner recess filled with solder and fixed.
  • a first object of the present invention is to provide a distal end of an operation wire, a distal end of a lead wire of a tip electrode, and a temperature sensor protective tube in which a temperature measuring portion of the temperature sensor is inserted and fixed.
  • An object of the present invention is to provide a catheter capable of tip deflection operation which is disposed at an appropriate position of a recess and is fixed to the tip electrode.
  • a second object of the present invention is to provide a bi-directional type thin catheter having a small diameter tip deflection operation.
  • the third object of the present invention is to provide a catheter capable of tip deflection operation which is excellent in flatness of shape change of the tip flexible portion during tip deflection operation.
  • a fourth object of the present invention is to provide a catheter capable of tip deflection operation that is excellent in workability during manufacture.
  • the tip deflection operable catheter of the present invention includes a catheter tube having a tip flexible portion; A tip electrode fixed to the distal end of the catheter tube; An operation wire that is arranged so as to extend along the axial direction inside the catheter tube, and whose proximal end can be pulled; and A lead wire of the tip electrode, which is disposed so as to extend along the axial direction inside the catheter tube, and whose distal end is connected to the tip electrode; A temperature sensor comprising a thermocouple for measuring the temperature inside the tip electrode; An insulating temperature sensor protective tube into which the temperature measuring section of the temperature sensor is inserted and fixed; A columnar anchor member fitted in an inner recess of the tip electrode to fix the distal end of the manipulation wire to the tip electrode; The anchor member is formed with two through-holes extending in the axial direction so as to face each other across the central axis of the anchor member, and two inner holes extending in the axial direction and opening on the proximal end side,
  • the manipulation wire has a proximal
  • the temperature sensor protective tube is inserted and fixed in one inner hole formed in the anchor member, so that the temperature measuring portion of the temperature sensor is disposed inside the tip electrode, and the other formed in the anchor member.
  • the distal end of the conducting wire is inserted and fixed in the inner hole of the lead wire so that the conducting wire is connected to the tip electrode.
  • the anchor member is fitted in the inner concave portion of the distal electrode, and the operation wire is distant from the one end side (proximal end side) inside the catheter tube.
  • the catheter tube extends in the lateral direction, passes through one through hole of the anchor member fitted in the inner recess of the tip electrode, turns back at the distal end of the anchor member, passes through the other through hole of the anchor member, and passes through the other through hole. Since it consists of one wire extending in the proximal direction to the other end (proximal end), the distal end of the operation wire is arranged and fixed at an appropriate position of the inner recess of the tip electrode. be able to.
  • the operation wire is folded at the distal end of the anchor member fitted in the inner recess of the tip electrode and fixed to the tip electrode by passing through two through holes.
  • the distal end of the operation wire does not come off from the inner concave portion of the electrode, and can be firmly fixed to the tip electrode regardless of the type of the constituent material.
  • the two through holes formed in the anchor member are arranged so as to face each other with the central axis of the anchor member interposed therebetween, one end and the other end of the operation wire passed through the two through holes are pulled.
  • the direction of the distal end of the catheter can be changed in both directions, and the shape change flatness at the distal end flexible portion of the catheter is excellent.
  • the temperature sensor protection tube is inserted and fixed in one of the inner holes formed in the anchor member, the temperature sensor protection tube (the temperature sensor of the temperature sensor) is placed at an appropriate position in the inner recess of the tip electrode. It can be placed and secured to the tip electrode.
  • the conducting wire is disposed at an appropriate position in the inner recess of the tip electrode, and is electrically connected to the tip electrode. Can be connected.
  • the arrangement position (occupied space) of the distal end of the operation wire in the inner recess of the tip electrode can be secured by the through hole of the anchor member, and the arrangement position of the distal end of the conductor and the temperature sensor protective tube ( Occupied space) can be ensured by the corresponding inner hole of the anchor member. Then, by efficiently disposing the through hole and the inner hole in the anchor member, the size of the tip electrode is reduced and the diameter of the catheter is reduced (for example, the outer diameter is set to 5 Fr or less). Can do.
  • the distal end of the operation wire, the distal end of the lead wire of the tip electrode, the temperature sensor protective tube (the temperature sensor of the temperature sensor), Is attached to the anchor member to constitute an assembly, and this assembly is attached to the tip electrode (the anchor member is fitted into the inner recess), whereby the workability can be improved.
  • the outer diameter of the catheter tube is 5 Fr or less, and the opening diameter of the inner recess of the distal electrode is 1.3 mm or less. In such a small-diameter catheter, it is effective to employ the structure according to the present invention.
  • the anchor member is preferably made of brass.
  • the temperature sensor protective tube in which the distal end of the operation wire constituting the catheter, the distal end of the lead wire of the tip electrode, and the temperature sensor of the temperature sensor are inserted and fixed Can be disposed at an appropriate position in the inner recess of the tip electrode, and these can be fixed to the tip electrode.
  • a catheter having a small diameter for example, an outer diameter of 5 Fr or less
  • the distal deflection operable catheter of the present invention is excellent in the flatness of the shape change of the distal flexible portion during the distal deflection operation.
  • the distal deflection operable catheter of the present invention is excellent in workability at the time of manufacture.
  • FIG. 3 is a longitudinal sectional view showing a distal end portion of the electrode catheter shown in FIG. 1 (cross-sectional view taken along line III-III in FIG. 2).
  • FIG. 4 is a transverse sectional view (IV-IV sectional view of FIG. 2) showing a distal end portion of the electrode catheter shown in FIG.
  • FIG. 5 is a transverse sectional view (a VV sectional view of FIG. 2) showing a distal end portion of the electrode catheter shown in FIG.
  • the electrode catheter 100 of the present embodiment shown in FIGS. 1 to 5 is used for, for example, diagnosis or treatment of arrhythmia in the heart.
  • the electrode catheter 100 of this embodiment includes a catheter tube 10 having a tip flexible portion 15, a tip electrode 20 having an inner recess 20 ⁇ / b> C fixed to the distal end of the catheter tube 10, and the inside of the catheter tube 10 (lumen 11). And the lumen 12) are arranged so as to extend along the axial direction, and the proximal end of the manipulation wire 30 can be pulled and the catheter tube 10 (lumen 14) extends along the axial direction. And a temperature sensor 50 including a thermocouple for measuring a temperature inside the tip electrode 20, and a temperature measuring unit of the temperature sensor 50.
  • Insulating temperature sensor protective tube 60 into which 50A is inserted, and tip electrode 20 for fixing the distal end of operation wire 30 to tip electrode 20 A cylindrical anchor member 80 fitted in the inner recess 20C, and a connector (handle) 70 attached to the proximal end of the catheter tube 10; the anchor member 80 includes a center of the anchor member 80; Two through holes (through hole 81 and through hole 82) extending in the axial direction so as to face each other across the shaft, and two inner holes (inner hole 83 and inner hole 84) extending in the axial direction and opening at the proximal end side
  • One end and the other end of the operation wire 30 are proximal ends, and the inside (lumen 11) of the catheter tube 10 extends in the distal direction from one end side, and one through-hole 81 of the anchor member 80 is formed.
  • the temperature sensor protective tube 60 is inserted into and fixed to one inner hole 83 formed in the anchor member 80, and the temperature measuring unit 50A of the temperature sensor 50 is connected to the tip electrode 20 by the one end hole 83 formed in the anchor member 80.
  • the distal end of the conducting wire 40 is inserted into and fixed to the other inner hole 84 formed in the anchor member 80, so that the conducting wire 40 is electrically connected to the tip electrode 20. It is connected to the.
  • the electrode catheter 100 of the present embodiment shown in FIGS. 1 to 5 includes a catheter tube 10, a tip electrode 20, an operation wire 30, a lead electrode lead wire 40, a temperature sensor 50, and a temperature sensor protective tube 60.
  • the anchor member 80 and the connector 70 are provided.
  • reference numeral 75 denotes a knob for performing a swinging operation (catheter tip deflection operation) of the catheter tube 10.
  • 90 is a solder for fixing the anchor member 80 to the tip electrode 20.
  • the catheter tube 10 is a multi-lumen tube having a flexible distal end portion 15 and four lumens (11, 12, 13, 14) formed therein.
  • the “tip flexible portion” refers to a distal end portion of the catheter tube that can be bent (bent) by pulling the operation wire.
  • the catheter tube 10 may be formed of a tube having the same characteristics along the axial direction, but the distal end flexible portion (distal end portion) having relatively high flexibility and the distal end flexible portion It is preferable to have a rear end portion (proximal end portion) that is integrally formed in the axial direction and is relatively more rigid than the tip flexible portion.
  • the constituent material of the catheter tube 10 include synthetic resins such as polyolefin, polyamide, polyether block polyamide, and polyurethane.
  • the outer diameter of the catheter tube 10 is usually 2 Fr (0.65 mm) to 8 Fr (2.7 mm), and is preferably 5 Fr or less from the viewpoint of reducing the diameter.
  • the tip electrode 20 fixed to the distal end of the catheter tube 10 is formed by integrally forming a bullet-shaped tip portion 201 and a cylindrical portion 202 continuous therewith.
  • the cylindrical portion 202 of the tip electrode 20 is inserted into the distal end of the catheter tube 10 and is fixed to the distal end of the catheter tube 10 with an adhesive or the like.
  • the constituent material of the tip electrode 20 include metals having good thermal conductivity such as aluminum, copper, stainless steel, gold, and platinum.
  • the tip electrode 20 is preferably made of platinum or the like in order to provide good contrast properties for X-rays.
  • the outer diameter of the tip electrode 20 is preferably approximately the same as the outer diameter of the catheter tube 10.
  • the inside of the tip electrode 20 is a columnar space (inner recess 20C) for accommodating and fitting an anchor member 80 described later.
  • the opening diameter of the inner recess 20C corresponding to the inner diameter of the tip electrode 20 is 0.1 to 2.4 mm, and preferably 1.3 mm or less.
  • the operation wire 30 constituting the electrode catheter 100 extends along the axial direction inside the catheter tube 10 (lumen 11 and lumen 12).
  • an outward path portion 30 ⁇ / b> A extending in the distal direction from one end side extends to the lumen 11
  • a return path portion 30 ⁇ / b> B that is folded back and extends in the proximal direction extends to the lumen 12.
  • One end and the other end, which are proximal ends of the operation wire 30, are connected to a knob 75 for performing a deflection operation of the catheter tube 10, thereby enabling a pulling operation.
  • the distal end of the operation wire 30 is fixed to the tip electrode 20 by a columnar anchor member 80 fitted in the inner recess 20 ⁇ / b> C of the tip electrode 20.
  • the anchor member 80 has two through-holes (through-hole 81 and through-hole 82) extending in the axial direction so as to face each other across the central axis, and the center of the anchor member 80.
  • Two inner holes (an inner hole 83 and an inner hole 84 that open on the proximal end side) are formed to extend in the axial direction so as to face each other across the shaft.
  • the outer diameter of the anchor member 80 is formed to be slightly smaller than the inner diameter of the inner recess 20C of the tip electrode 20, and the anchor member 80 is inserted into the inner recess 20C of the tip electrode 20, and in a slight gap between the two. Is filled with solder 90. In this way, the anchor member 80 and the inner concave portion 20C of the tip electrode 20 are fitted (by this, the central axes of both of them match), and electrical conductivity and good thermal conductivity are ensured between them. Has been.
  • a metal material having good wettability with respect to the solder 90 is preferable. From this point of view, copper or a copper alloy can be cited as a suitable constituent material of the anchor member 80, and brass (brass) having good thermal conductivity and good wettability with respect to solder is particularly preferable.
  • the solder 90 filled in the inner recess 20C (the gap with the anchor member 80) of the tip electrode 20 is not particularly limited.
  • Pb-free solders such as Sn—Ag—Cu, Sn—Cu, Sn—Ag, Sn—Ag—Cu—Bi and the like can also be used.
  • the operation wire 30 is composed of one wire whose one end and the other end are a proximal end and whose folded portion is a distal end.
  • the operation wire 30 extends in the distal direction from one end side (proximal end side) in the lumen 11 inside the catheter tube 10, and the through hole 81 of the anchor member 80 fitted in the inner recess 20 ⁇ / b> C of the tip electrode 20.
  • the operation wire 30 extending inside the catheter tube 10 passes through the through hole 81 of the anchor member 80, is folded at the distal end surface 80D, and passes through the through hole 82.
  • the distal end of the operation wire 30 can be firmly fixed to the anchor member 80 (and thus the tip electrode 20). Even if the proximal end of the operation wire 30 is pulled, the distal end of the operation wire 30 does not come out of the inner recess 20 ⁇ / b> C of the tip electrode 20.
  • the through hole 81 and the through hole 82 are arranged so as to face each other with the central axis of the anchor member 80 (the central axis of the tip electrode 20) interposed therebetween, the through hole 81 and the through hole 82 are located close to the operation wire 30 passed through these through holes.
  • the direction of the distal end of the electrode catheter 100 can be changed in both directions, and the flatness of the shape change of the tip flexible portion of the electrode catheter 100 can be improved. Is also excellent.
  • the constituent material of the operation wire 30 is not particularly limited, and all the same constituent materials as those of the conventionally known operation wires of the tip deflection operable catheter can be used.
  • a metal material having low wettability to solder for example, (Stainless steel) can be suitably used as the constituent material of the operation wire 30, and even a non-metallic material can be used.
  • the diameter of the operation wire 30 is, for example, 0.05 to 0.5 mm, preferably 0.1 to 0.3 mm. Note that the inner diameters of the through hole 81 and the through hole 82 of the anchor member 80 are slightly larger than the diameter of the operation wire 30, and the inner peripheral surface of the through holes 81 and 82 and the outer peripheral surface of the operation wire 30. A small gap between them is filled with solder 90.
  • the conducting wire 40 constituting the electrode catheter 100 extends inside the catheter tube 10 (lumen 14) and inside the connector 70, and the proximal end of the conducting wire 40 is pulled out from the connector 70 and connected to, for example, a high frequency generator.
  • the distal end of the conducting wire 40 is inserted into an inner hole 84 formed in the anchor member 80, and solder 90 entering the inner hole 84 is used to fix the anchor member 80 to the anchor member 80. It is fixed. Thereby, the conducting wire 40 is electrically connected to the anchor member 80 (and thus the tip electrode 20).
  • the conducting wire 40 a normal resin-coated conducting wire can be used.
  • the diameter of the conductor 40 is, for example, 0.04 to 0.3 mm, and preferably 0.06 to 0.12 mm.
  • the temperature sensor 50 constituting the electrode catheter 100 is for measuring the temperature inside the distal electrode 20, and is an essential component in the ablation catheter.
  • the temperature sensor 50 is made of a thermocouple, and the portions other than the tip region including the temperature measuring unit 50A are covered with an insulating material such as polyimide.
  • a temperature measuring unit 50A of the temperature sensor 50 (a joining portion of dissimilar metals in the thermocouple) is inserted into the temperature sensor protective tube 60 and fixed to the temperature sensor protective tube 60 by an adhesive 65 filled therein. Yes. Further, as shown in FIGS. 3 and 4, the temperature sensor protective tube 60 (at least the portion to which the temperature measuring portion 50 ⁇ / b> A of the temperature sensor 50 is bonded and fixed) is inserted into the inner hole 83 formed in the anchor member 80. The anchor member 80 is fixed to the anchor member 80 by an adhesive filled in the inner hole 83. Thereby, the temperature measuring part 50A of the temperature sensor 50 can be disposed and fixed in the inner recess 20C of the tip electrode 20, and the temperature sensor protection tube 60 ensures insulation between the temperature sensor 50 and the tip electrode 20. can do.
  • Examples of the adhesive 65 for filling the temperature sensor protective tube 60 and fixing the temperature sensor 50 and the adhesive for filling the inner hole 83 of the anchor member 80 and fixing the temperature sensor protective tube 60 include: An epoxy-based thermosetting adhesive can be preferably used.
  • the temperature sensor protective tube 60 an insulating resin tube can be used, and a polyimide tube can be cited as a suitable example.
  • the inner diameter of the temperature sensor protective tube 60 is, for example, 0.1 to 0.5 mm, preferably 0.2 to 0.4 mm.
  • the outer diameter of the temperature sensor protective tube 60 is, for example, 0.2 to 0.6 mm, and preferably 0.3 to 0.5 mm.
  • the inner diameter of the inner hole 83 of the anchor member 80 is slightly larger than the outer diameter of the temperature sensor protective tube 60.
  • the temperature sensor protective tube 60 is fixed to the inner hole 83 of the anchor member 80 by filling a small amount of adhesive into the gap between the inner peripheral surface of the inner hole 83 and the outer peripheral surface of the temperature sensor protective tube 60. can do.
  • the air layer is not formed around the temperature sensor protective tube 60 by filling the adhesive, good thermal conductivity from the tip electrode 20 to the temperature sensor 50 can be ensured.
  • either one end or the other end of the operation wire 30 is pulled in the proximal direction, and the distal flexible portion of the electrode catheter 100 is bent, and the electrode catheter 100 is bent.
  • the distal end of can be deflected in the direction indicated by arrow A or B.
  • the knob 75 shown in FIG. 1 in the A1 direction, one end of the operation wire 30 is pulled in the proximal direction, and the distal end of the electrode catheter 100 is deflected in the direction indicated by the arrow A. Further, by rotating the knob 75 in the B1 direction, the other end of the operation wire 30 is pulled in the proximal direction, and the distal end of the electrode catheter 100 is deflected in the direction indicated by the arrow B. If the connector 70 is rotated around the axis, the direction in the A or B direction with respect to the electrode catheter 100 can be freely set while being inserted into the body cavity.
  • the distal end of the operation wire 30 can be disposed at an appropriate position of the inner recess 20C of the tip electrode 20 and can be firmly fixed to the tip electrode 20. Therefore, when the proximal end of the operation wire 30 is pulled, the distal end of the operation wire 30 does not come out of the inner recess 20 ⁇ / b> C of the tip electrode 20. Further, since the temperature sensor protective tube 60 is inserted and fixed in the inner hole 83 formed in the anchor member 80, the temperature measuring unit 50A of the temperature sensor 50 can be connected to the inner recess 20C of the tip electrode 20 appropriately. The tip electrode 20 can be fixed at the position.
  • the conducting wire 40 is disposed at an appropriate position of the inner recess 20C of the tip electrode 20, and the tip The electrode 20 can be electrically connected.
  • the arrangement position of the distal end of the operation wire 30 can be secured by the through hole 81 and the through hole 82 of the anchor member 80, and the arrangement position of the distal end of the conducting wire 40.
  • the diameter can be increased (for example, the outer diameter is 5 Fr or less).
  • the through hole 81 and the through hole 82 are arranged so as to face each other with the central axis of the anchor member 80 (the central axis of the tip electrode 20 with which the anchor member 80 is fitted) interposed therebetween, By pulling one end or the other end of the operation wire 30 passed through the holes 81 and 82, the direction of the distal end of the electrode catheter 100 can be changed in both directions. The flatness of the shape change in the flexible portion 15 is also excellent.
  • the distal end of the operation wire 30, the distal end of the conducting wire 40, and the temperature sensor protective tube 60 are attached to the anchor member 80 to form an assembly, and this assembly is attached to the tip electrode 20.
  • the anchor member 80 in the assembly into the inner recess 20C of the tip electrode 20, the electrode catheter 100 of this embodiment can be easily manufactured.
  • the inner hole into which the temperature sensor and the conducting wire are inserted and fixed may be a through hole.
  • a ring electrode may be attached to the distal end of the catheter tube.
  • a leaf spring may be disposed at the distal flexible portion of the catheter tube.
  • the outer diameter of the tip electrode may be larger than the outer diameter of the catheter tube.
  • Electrode catheter 10 Catheter tube 11, 12, 13, 14 Lumen 15 Tip flexible part 20 Tip electrode 20C Inner recessed part 201 Tip part 202 Cylindrical part 30 Operation wire 30A Outward part 30B Return part 40 Lead wire 50 Temperature sensor 50A Temperature measurement Portion 60 Temperature sensor protective tube 70 Connector 75 Knob 80 Anchor member 80D Distal end surface 81, 82 Through hole 83, 84 Inner hole 90 Solder

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Abstract

La présente invention concerne l'obtention d'un cathéter de type bidirectionnel muni d'une extrémité pliable et de petit diamètre. Elle concerne un cathéter muni d'une extrémité pliable comprenant un tube de cathéter (10) ; une électrode d'extrémité (20) ; un fil de commande (30) ; un fil conducteur (40) ; un capteur de température (50) ; un tube de protection du capteur de température (60) ; et un élément d'ancre (80) pour le fil de commande. Des trous traversants (81, 82) et des trous internes (83, 84) sont formés dans l'élément d'ancre (80). Le fil de commande (30) comprend un fil qui s'étend à l'intérieur du tube de cathéter (10) depuis un de ses côtés de bord dans la direction distale, traverse le trou traversant (81) de l'élément d'ancre (80), est replié vers l'arrière au niveau de l'extrémité distale (80D), traverse le trou traversant (82), s'étend à l'intérieur du tube de cathéter (10) dans la direction proximale, et rejoint l'autre bord. Le tube de protection du capteur de température (60) est inséré dans le trou interne (83) de l'élément d'ancre (80) et fixé de telle sorte que la section de mesure de la température du capteur de température (50) soit placée à l'intérieur de l'électrode d'extrémité (20). L'extrémité distale du fil conducteur (40) est insérée dans le trou traversant (84) de l'élément d'ancre (80) et fixé de telle sorte que le fil conducteur (40) soit connecté à l'électrode pointe (20).
PCT/JP2014/059107 2013-06-06 2014-03-28 Cathéter muni d'une extrémité pliable Ceased WO2014196249A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013119721A JP2014236787A (ja) 2013-06-06 2013-06-06 先端偏向操作可能カテーテル
JP2013-119721 2013-06-06

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WO2014196249A1 true WO2014196249A1 (fr) 2014-12-11

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PCT/JP2014/059107 Ceased WO2014196249A1 (fr) 2013-06-06 2014-03-28 Cathéter muni d'une extrémité pliable

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WO (1) WO2014196249A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN115607266A (zh) * 2022-10-21 2023-01-17 上海鸿电医疗科技有限公司 防脱落医疗导管

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JP5969635B2 (ja) 2015-01-15 2016-08-17 日本ライフライン株式会社 カテーテル
JP6456315B2 (ja) * 2016-02-16 2019-01-23 日本ライフライン株式会社 電極カテーテル

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JP2009291495A (ja) * 2008-06-06 2009-12-17 Japan Lifeline Co Ltd カテーテル
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JP2009291495A (ja) * 2008-06-06 2009-12-17 Japan Lifeline Co Ltd カテーテル
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CN113316447A (zh) * 2019-01-21 2021-08-27 株式会社Jms 管芯装置
CN115607266A (zh) * 2022-10-21 2023-01-17 上海鸿电医疗科技有限公司 防脱落医疗导管

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