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WO2016157586A1 - Cathéter et procédé pour sa fabrication. - Google Patents

Cathéter et procédé pour sa fabrication. Download PDF

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Publication number
WO2016157586A1
WO2016157586A1 PCT/JP2015/080242 JP2015080242W WO2016157586A1 WO 2016157586 A1 WO2016157586 A1 WO 2016157586A1 JP 2015080242 W JP2015080242 W JP 2015080242W WO 2016157586 A1 WO2016157586 A1 WO 2016157586A1
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WO
WIPO (PCT)
Prior art keywords
tubular member
catheter
irrigation
lumen
gap
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/JP2015/080242
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English (en)
Japanese (ja)
Inventor
一樹 中神
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 WO2016157586A1 publication Critical patent/WO2016157586A1/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
    • 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

Definitions

  • the present invention relates to a catheter used for, for example, examination (diagnosis) and treatment of arrhythmia and a method for manufacturing the same.
  • the catheter is inserted into the body (for example, the inside of the heart) through a blood vessel and used for arrhythmia examination and treatment (for example, see Patent Document 1).
  • the shape near the distal end (distal end) inserted into the body is generally used for the operation of the operation unit attached to the proximal end (proximal end, rear end, proximal side) disposed outside the body. In response, it changes (deflects, curves) in one or both directions.
  • the lead wires and the operation wires may interfere with each other during the deflection operation of the catheter shaft.
  • the presence of this gap may cause the catheter shaft itself to be kinked (buckled).
  • the present invention has been made in view of such problems, and an object thereof is to provide a catheter that prevents interference between components inside the catheter and kinking of the catheter shaft itself, and a method for manufacturing the same.
  • the catheter of the present invention is provided with a tubular member having one or more lumens, a distal end member having one or more lumens, and provided on the distal side of the tubular member and spaced apart from the tubular member, a lumen of the tubular member, and One or more linear members inserted through the lumen of the distal end side member, a transparent tube provided between the tubular member and the distal end side member and through which the linear member is passed, a tubular member, and the distal end side member And an ultraviolet curable resin portion filled in a gap formed by a transparent tube.
  • the ultraviolet curable resin portion is filled in the gap portion, an appropriate interval between the tubular member and the distal end side member is maintained even when the deflection operation is performed. Thereby, the deformation
  • the tubular member has a first end face facing the distal end side member and a first passage that is extended along the tubular direction and exposed to the first end face.
  • You may have a 2nd end surface facing a tubular member, and the 2nd channel
  • path in a 2nd end surface may differ from each other within the surface orthogonal to a tubular direction.
  • an electrode provided on the side opposite to the tubular member of the distal end member is further provided, and the linear member may be extended from the tubular member to the electrode via the gap portion and the distal end side member in order.
  • the ultraviolet curable resin part is good to fill the gap part so as to embed the linear member.
  • the linear member includes a first conductive wire and a second conductive wire, and the tubular member is sandwiched between the first conductive wire and the second conductive wire in a cross-sectional direction orthogonal to the tubular direction and in the tubular direction. It is good to have the plate-shaped spring member extended
  • the ultraviolet curable resin portion may be in close contact with the tubular member and the distal end side member.
  • the transparent tube which covers the circumference
  • the transparent tube may be formed so as to cover a part of the outer peripheral surface of the tubular member and a part of the outer peripheral surface of the distal end side member and to be in close contact with one end of the outer tube.
  • the catheter of the present invention and the manufacturing method thereof, it is possible to provide a catheter that can prevent interference between components inside the catheter and kinking of the catheter shaft itself.
  • FIG. 2 is an enlarged perspective view showing the vicinity of the distal end portion of the catheter shown in FIG. 1.
  • FIG. 6 is another perspective view showing the vicinity of the distal end portion of the catheter shown in FIG. 1 in an enlarged manner.
  • FIG. 2 is an enlarged cross-sectional view illustrating the vicinity of a distal end portion of the catheter illustrated in FIG. 1.
  • FIG. 4 is a cross-sectional view in the direction of the arrow along the line IVA-IVA in the vicinity of the distal end portion of the catheter shown in FIG. 3.
  • FIG. 4 is a cross-sectional view taken along the line IVB-IVB in the vicinity of the distal end portion of the catheter shown in FIG. 3.
  • FIG. 1 schematically shows an overall configuration example of an ablation catheter 1 (hereinafter simply referred to as a catheter 1) according to an embodiment of the present invention.
  • 2A and 2B are enlarged perspective views showing a region II surrounded by a broken line in FIG.
  • FIG. 2B shows a state in which the transparent tube 7A and the ultraviolet curable resin portion 7B shown in FIG. 2A are removed and a part of the internal structure is exposed.
  • the catheter 1 is a kind of electrode catheter, and is a device for treating arrhythmia and the like by being inserted into the body of a patient or the like through a blood vessel and ablating (cauterizing) the affected part.
  • the catheter 1 has an irrigation mechanism that causes a predetermined irrigation liquid (for example, physiological saline) to flow out (inject) from the opening 6K near the tip during ablation.
  • the catheter 1 includes a shaft 2 (catheter shaft) as a catheter body, and an operation unit 3 attached to the proximal end (proximal end, rear end, proximal side) of the shaft 2.
  • the shaft 2 has a flexible tubular structure (a tubular member 4 to be described later), and in the order from the operation unit 3 side along the axial direction (Z-axis direction) of the shaft 2, the proximal end region A1 and the intermediate region. (Boundary region) Am and tip region A2.
  • the tip region A2 of the shaft 2 is a portion that is deflected (curved) by the operation of the operation unit 3.
  • the base end region A1 of the shaft 2 is a portion that maintains a linear shape without being deflected (curved) by the operation of the operation unit 3.
  • the intermediate region Am is a portion that connects the proximal end region A1 and the distal end region A2.
  • the axial length of the shaft 2 is about 500 to 1200 mm (for example, 1100 mm), and the outer diameter of the shaft 2 (the outer diameter of the XY cross section) is about 0.6 to 3 mm (for example, 2.0 mm). ).
  • the lengths of the base region A1, the tip region A2, and the intermediate region Am in the shaft 2 are about 400 to 1200 mm (for example, 800 mm), about 100 to 400 mm (for example, 150 mm), and about 1 to 100 mm, respectively. Degree (for example, 50 mm).
  • ring-shaped electrodes 21A, 21B, 21C and a distal end electrode 22 are provided near the distal end of the shaft 2 from the proximal end side toward the distal end side. They are arranged at predetermined intervals in this order.
  • the ring electrodes 21A, 21B, 21C and the tip electrode 22 are a plurality of conductors 71B, 71C, 72, 73 (not shown in FIGS. 1, 2A, 2B), which will be described later, inserted into the tubular structure of the shaft 2. And is electrically connected to a connector provided in the operation unit 3. Further, as shown in FIG.
  • the irrigation member 6 is provided on the proximal end side of the distal electrode 22 in the distal end region A2, and a part of the outer peripheral surface of the irrigation member 6 and the outer peripheral surface of the tubular member 4 are provided. In some cases, a transparent tube 7A is provided.
  • the irrigation member 6 is a specific example corresponding to the “tip-side member” of the present invention).
  • Each of the ring electrodes 21A, 21B, 21C and the tip electrode 22 has good electrical conductivity, such as aluminum (Al), copper (Cu), stainless steel (SUS), gold (Au), platinum (Pt), etc. It is made of a simple metal material. In addition, in order to make the contrast property with respect to X-rays favorable at the time of use of the catheter 1, it is preferable to be comprised with platinum or its alloy. Further, the outer diameters of the ring-shaped electrodes 21A, 21B, 21C and the tip electrode 22 are not particularly limited, but are desirably approximately the same as the outer diameter of the shaft 2 described above.
  • the operation unit 3 is attached to the base end of the shaft 2 (end portion of the base end region A1), and includes, for example, a handle 31 (gripping unit) and a rotating plate 32 in addition to the connector described above.
  • the handle 31 is a portion that is gripped (gripped) by the operator (doctor) when the electrode catheter 1 is used.
  • a connector (not shown) having a plurality of terminals is provided at the proximal end of the handle 31, and various terminals (conductors 71B, 71C, 72, 73) to be described later from the inside of the shaft 2 are connected to the terminals of the connector.
  • the rear end is connected.
  • the rotating plate 32 is connected to rear ends of operation wires PW1 and PW2 described later.
  • the conducting wires 71B, 71C, 72, 73 and the operation wires PW1, PW2 are specific examples corresponding to the “linear members” of the present invention.
  • the rotating plate 32 is a member for performing a deflection movement operation (swing operation), which is an operation when the tip region A2 of the shaft 2 is deflected (curved).
  • the rotating plate 32 has protrusions 32A and 32B.
  • the rotating plate 32 rotates by pushing the protrusions 32A and 32B along the rotation direction d1a or the rotation direction d1b.
  • An operation of rotating the plate 32 in the direction of the arrow d1a or the arrow d1b is possible.
  • the operation wires PW1 and PW2 are wires for deflecting (curving) the distal end region A2, and the distal ends thereof are fixed to the distal end side of the shaft 2 (on the outer peripheral surface of the irrigation member 6) by an anchor, solder, or the like.
  • the proximal ends of the operation wires PW1 and PW2 are attached to the rotary plate 32 in the operation unit 3. Accordingly, the tension of the operation wires PW1 and PW2 changes according to the rotation operation of the rotation plate 32 (operation of the rotation plate 32), and the operation wire PW1 along the central axis in the shaft 2 (inside the tubular structure). , PW2 can be pulled (sliding). Therefore, when the rotating plate 32 is rotated, the distal end region A2 of the catheter 1 is deflected.
  • FIG. 3 is an enlarged sectional view showing the distal end portion of the catheter 1.
  • 4A is a schematic diagram showing a configuration example of a cross section (XY cross section) in the direction of the arrow along the line IVA-IVA shown in FIG. 3
  • FIG. 4B is an IVB- It is a schematic diagram showing the structural example of the cross section (XY cross section) of the arrow direction along the IVB line.
  • the tip region A ⁇ b> 2 includes, in addition to the ring-shaped electrodes 21 ⁇ / b> A, 21 ⁇ / b> B, 21 ⁇ / b> C and the tip electrode 22, a tubular member 4 having a plurality of lumens, and between the tubular member 4 and the tip electrode 22.
  • An irrigation member 6 that is positioned and supports the tip electrode 22 is provided.
  • the tubular member 4 is a resin tube and is a multi-lumen tube having a plurality of lumens 42AH, 42BH, 43A, 43B, 44, 45 (described later) extending in the Z-axis direction.
  • a plate spring member 41 extending in the Z-axis direction along the central axis of the tubular member 4 is provided.
  • the tubular member 4 is made of a thermoplastic resin such as polyamide, polyether polyamide, polyurethane, polyether block amide (PEBAX) (registered trademark), and nylon.
  • the outer tube 8 is provided so as to cover the tubular member 4 (FIGS. 2A and 2B), and is connected to the proximal end side of the ring-shaped electrode 21A as shown in FIG. 2A.
  • the outer tube 8 is made of the same resin as the tubular member 4.
  • the outer tube 8 and the tubular member 4 may be integrally molded to constitute a multi-lumen tube.
  • the transparent tube 7A is a transparent resin tube, is provided between the tubular member 4 and the irrigation member 6, and connects the two.
  • transparent means passing light having a wavelength capable of curing the ultraviolet curable resin portion 7B described later.
  • the transparent tube 7A may be transparent in the visible light region (410 nm to 700 nm), or may not pass through the visible light region as long as it transmits ultraviolet rays.
  • the distal end side of the transparent tube 7A is provided so as to cover the irrigation member 6, and ring-shaped electrodes 21B and 21C are provided on the outer peripheral surface thereof.
  • the base end side of the transparent tube 7A is fused and joined to the outer tube 8.
  • the transparent tube 7 ⁇ / b> A is made of the same resin as the tubular member 4 and the outer tube 8.
  • the transparent tube 7A may be in close contact with the outer tube 8 on the proximal end side and in close contact with the irrigation member 6 on the distal end side.
  • the tip electrode 22 is disposed at the forefront of the shaft 2 and supported by the irrigation member 6.
  • the tip electrode 22 has an internal space 22A that extends along the central axis CL of the shaft 2 and is opened rearward, and a convex portion 22C that includes an open end 22B of the internal space 22A.
  • a lead wire 72 for applying the potential of the tip electrode 22 and a lead wire 73 as a lead wire for the temperature sensor are inserted into the internal space 22A from the open end 22B.
  • the irrigation member 6 is a member for supporting the tip electrode 22 and irrigating the liquid. 2A and 2B, a plurality of openings 6K for ejecting (irrigating) the liquid supplied from the tubular member 4 along the outer peripheral surface of the tip electrode 22 is provided along the outer periphery of the irrigating member 6 or the like. Arranged at angular intervals.
  • the irrigation member 6 is made of, for example, a ceramic material, and is provided in the vicinity of the central axis so that the through hole 62K extends in the Z-axis direction.
  • the tube 63 is a resin tube provided to protect the conducting wire 72 and the conducting wire 73 from the irrigation member 6 made of a ceramic material, and the conducting wire 72 and the conducting wire 73 are inserted (the through-hole 62K and the lumen of the tube 63 are It corresponds to the lumen of the tip side member). Therefore, the conducting wire 72 and the conducting wire 73 are led from the internal space 22 ⁇ / b> A of the distal electrode 22 through the irrigation member 6 to the tubular member 4 on the proximal end side across the gap CR described later.
  • the conducting wires 72 and 73 inserted into one tube 63 are branched at the gap CR, they are inserted into the lumen 42BH and the lumen 42AH (both will be described in detail later) provided on the tubular member 4, respectively. It has become. Note that the center position of the tube 63 on the end face 62BS on the proximal end side of the irrigation member 6 does not match the center positions of the lumen 42BH and the lumen 42AH on the end face 4FS on the distal end side of the tubular member 4. For this reason, a gap CR is provided between the end face 62BS and the end face 4FS, and the lead wires 72 and 73 are transferred to the respective lumens using the clearances in the gap CR and passed therethrough.
  • the distal ends of the operation wires PW1, PW2 are fixed to the irrigation member 6, respectively.
  • the proximal ends of the operation wires PW1 and PW2 are guided to the tubular member 4 on the proximal end side across the gap CR.
  • the conducting wires 72 and 73 and the operation wires PW1 and PW2 have a structure in which the corresponding positions of the lumens passed between the irrigation member 6 and the tubular member 4 in the gap CR are replaced.
  • the outer peripheral surfaces of the tubular member 4 and the irrigation member 6 are covered with a transparent tube 7A.
  • the gap CR is filled with the ultraviolet curable resin portion 7B.
  • the ultraviolet curable resin portion 7B is not a liquid but a solid resin. It is desirable that the ultraviolet curable resin portion 7B is in close contact with both the tubular member 4 and the irrigation member 6.
  • a liquid ultraviolet curable resin is formed in accordance with the size of the gap CR. Filled.
  • ultraviolet rays are irradiated from above the transparent tube 7A to form a cured ultraviolet curable resin portion 7B. That is, since the transparent tube 7A is transparent, ultraviolet rays are transmitted. Therefore, after the ultraviolet curable resin is injected, the ultraviolet rays are irradiated from the outside of the transparent tube 7A so that the ultraviolet curable resin portion 7B is shaped into the tubular member 4 and the irrigation member 6. Can be cured together. At that time, by changing the ultraviolet irradiation conditions (irradiation time and illuminance) according to the filling amount, the ultraviolet curable resin portion 7B having desired physical properties can be obtained easily and stably.
  • the conducting wire 72 and the conducting wire 73 are hardened and protected by the ultraviolet curable resin portion 7B, damage due to interference with the tip edge 41T of the plate spring member 41 can be avoided.
  • the irrigation member 6 and the tubular member 4 are made of a hard material, if there is a space between the irrigation member 6 and the tubular member 4, there is a possibility that the shaft 2 itself kinks due to local stress concentration. As in the embodiment, such a kink can be prevented by using the ultraviolet curable resin portion 7B in the gap portion CR.
  • FIG. 4A shows a detailed configuration example of a cross section including the proximal end face 62BS (FIG. 3) of the irrigation member 6.
  • FIG. 4A a ring-shaped electrode 21B is fixedly disposed around the irrigation member 6 via a transparent tube 7A.
  • Storage grooves 62U1 to 62U3 are formed on the outer peripheral surface of the irrigation member 6.
  • the accommodation groove 62U1 accommodates a conductive wire 71B connected to the ring-shaped electrode 21B and a conductive wire 71C connected to the ring-shaped electrode 21C.
  • the operation wire PW1 is inserted and fixed in the accommodation groove 62U2, and the operation wire PW2 is inserted and fixed in the accommodation groove 62U3.
  • a through hole 62K is formed in the irrigation member 6 along the central axis CL, and a tube 63 is inserted into the through hole 62K. Furthermore, the conducting wire 72 and the conducting wire 73 are inserted through the lumen 63H (through hole 62K) which is the internal space of the tube 63.
  • the center position of the lumen 63H (through hole 62K) on the end face 62BS substantially coincides with, for example, the center axis CL.
  • a plurality of (two in FIG. 4B) through-holes 66 are provided around the through-hole 62K. The tube 51 is inserted into one of the two through holes 66, and the tube 52 is inserted into the other.
  • the lumens 51H and 52H which are the internal spaces of the tubes 51 and 52 respectively inserted into the two through-holes 66, function as a passage through which the irrigation liquid flows, and the liquid finally has an opening 6K (see FIGS. 2A and 2B). ).
  • FIG. 4B shows a detailed configuration example of a cross section including the end surface 4FS (FIG. 3) on the distal end side of the tubular member 4.
  • FIG. 4B a ring-shaped electrode 21A is fixedly disposed around the tubular member 4 via a transparent tube 7A.
  • the tubular member 4 is provided with a plate-like spring member 41 extending along the central axis CL so as to penetrate the inside thereof, and further, the plate-like spring member 41 is opposed to the Y-axis direction.
  • a tube 42A and a tube 42B extending in the Z-axis direction are arranged.
  • a conducting wire 73 is inserted through the lumen 42AH, which is the internal space of the tube 42A, and a conducting wire 72 is inserted through the lumen 42BH, which is the internal space of the tube 42B.
  • the center position of the lumen 42AH and the center position of the lumen 42BH on the end face 62BS are different from the center position of the lumen 63H (through hole 62K) (FIG. 4A) on the end face 62BS.
  • a lumen 43A and a lumen 43B extending in the Z-axis direction are formed so as to face each other with the tube 42A and the tube 42B sandwiched in the Y-axis direction.
  • the operation wire PW1 is inserted through the lumen 43A, and the operation wire PW2 is inserted through the lumen 43B.
  • the tubular member 4 is provided with a pair of lumens 44 provided so as to face each other with the center axis CL interposed therebetween, and a pair of lumens 45 arranged so as to face each other with the center axis CL interposed therebetween.
  • a tube 51 is inserted into one of the pair of lumens 45, and a tube 52 is inserted into the other.
  • the irrigation liquid flows through the lumens 51H and 52H, which are the internal spaces of the tubes 51 and 52, respectively. Therefore, the irrigation liquid flowing through the lumens 51H and 52H is finally ejected from the opening 6K (see FIGS. 2A and 2B).
  • the vicinity of the tip of the shaft 2 is curved along the direction d2a indicated by the arrow in FIG.
  • the operation wire PW2 is proximal to the inside of the shaft 2. Is pulled to.
  • the vicinity of the tip of the shaft 2 is curved along the direction d2b indicated by the arrow in FIG.
  • predetermined power is supplied to a counter electrode plate (not shown) mounted on the patient's body surface and the distal electrode 22 of the catheter 1 inserted into the patient's body.
  • a counter electrode plate (not shown) mounted on the patient's body surface and the distal electrode 22 of the catheter 1 inserted into the patient's body.
  • high-frequency energization is performed between the counter electrode plate and the electrode of the catheter 1.
  • the site to be treated (processed portion) in the patient is selectively ablated, and percutaneous treatment for arrhythmia or the like is performed.
  • an irrigation liquid is supplied to the catheter 1 by an external liquid supply device, and the liquid is ejected from the opening 6K in the vicinity of the tip electrode 22.
  • the irrigation liquid supply operation and the ejection operation are controlled by a control unit (not shown).
  • the gap CR is provided between the tubular member 4 and the irrigation member 6 in the shaft 2.
  • the center position of the lumen 42AH and the center position of the lumen 42BH on the end surface 4FS and the center position of the lumen 63H (through hole 62K) on the end surface 62BS do not coincide with each other in the XY plane. This is because they are different.
  • the conducting wire 72 and the conducting wire 73 extending along the central axis CL of the shaft 2 from the internal space 22A of the tip electrode 22 to the end surface 62BS of the irrigation member 6 have a margin in the gap CR.
  • the ultraviolet curable resin portion 7B is cured in accordance with the shapes of the tubular member 4 and the irrigation member 6 by the ultraviolet rays irradiated thereafter.
  • the ultraviolet curable resin portion 7B having desired physical properties can be obtained easily and stably.
  • the conducting wire 72 and the conducting wire 73 interfere with the front-end edge 41T of the plate-shaped spring member 41, and receive damage.
  • the filling amount is excessive or insufficient. Is unlikely to occur.
  • the gap CR is filled with the ultraviolet curable resin portion 7B, the lead wire extended to the tip electrode 22 through the tubular member 4, the gap CR, and the irrigation member 6 sequentially.
  • 72 and 73 and the operation wires PW1 and PW2 are held by the ultraviolet curable resin portion 7B, and movement (displacement) of the conducting wires 72 and 73 and the operation wires PW1 and PW2 in the direction orthogonal to the Z axis is restricted.
  • the conductors 72 and 73 and the operation wires PW1 and PW2 are prevented from being damaged, broken, or kinked.
  • the irrigation member 6 and the tubular member 4 are made of a hard material, if there is a space between the irrigation member 6 and the tubular member 4, there is a possibility that the shaft 2 itself kinks due to local stress concentration.
  • the ultraviolet curable resin portion 7B By filling the gap CR with the ultraviolet curable resin portion 7B as in the embodiment, such a kink can be prevented from occurring.
  • the plate spring member 41 is prevented from projecting into the gap CR during the deflection operation of the shaft 2. Thereby, it can avoid that the conducting wires 72 and 73 are damaged by the front-end edge 41T of the plate-shaped spring member 41.
  • the gap CR by filling the gap CR with the ultraviolet curable resin portion 7B, it is possible to prevent water from entering the inside of the shaft 2 from the outside, and to avoid current leakage between the electrodes.
  • the transparent tube 7A and the ultraviolet curable resin portion 7B are transparent, it can be visually confirmed that the gap portion CR and the periphery thereof are sufficiently filled with the ultraviolet curable resin portion 7B. Further, since the transparent tube 7A and the ultraviolet curable resin portion 7B are transparent, it is easy and direct to visually check that the embedded conductors 72 and 73 and the operation wires PW1 and PW2 are not damaged, broken, or kinked. Can be observed.
  • a predetermined gap CR is provided between the tubular member 4 in the shaft 2 and the irrigation member 6 that supports the tip electrode 22, and the gap CR is filled with the ultraviolet curable resin portion 7B.
  • each member described in the above embodiment are not limited, and other shapes, arrangement positions, materials, and the like may be used.
  • the number of lumens, the number of operation wires, and the like are not limited to the contents described in the above embodiment.
  • the number and positions of lumens through which the irrigation liquid flows are not limited to those in the above embodiment.
  • the material of each layer and each member demonstrated in the said embodiment is not limited, It is good also as another material.
  • the configuration of the electrode catheter (shaft) has been specifically described, but it is not always necessary to include all layers, and other layers may be further included.
  • the configuration of the electrode in the tip region A2 of the shaft 2 has been specifically described.
  • the arrangement, shape, number, and the like of the ring-shaped electrode and the tip electrode are not limited thereto.
  • an ablation catheter having an irrigation mechanism is described as an example, but the present invention is not limited to this. That is, it can also be applied to an ablation catheter that does not have an irrigation mechanism.
  • the present invention is not limited to an ablation catheter for treatment of arrhythmia and the like, and can be applied to an electrode catheter (so-called EP catheter) for examination (diagnosis) of arrhythmia and the like, for example.
  • an ablation catheter of a type in which the shape near the tip of the shaft 2 is deflected (curved) in both the direction d2a and the direction d2b (FIG. 1) according to the operation of the operation unit 3 is taken as an example.
  • the present invention is not limited to this. That is, the present invention is also applicable to a so-called steerable type ablation catheter in which the shape of the distal end region A2 of the shaft 2 changes in either the direction d2a or the direction d2b according to the operation of the operation unit 3, for example. It is possible to apply. In that case, the number of operation wires may be one.
  • the gap CR is formed by the gap between the tubular member 4 and the irrigation member 6, but the present invention is not limited to this.
  • the tip side member is not limited to the irrigation member 6, and any member can be used as long as it can form a gap with the tubular member 4.
  • a gap may be formed between the electrode and the tubular member, or different tubular members may be arranged on the front and rear sides to form the gap (in this case, the front tubular member becomes the tip side member).

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Abstract

L'invention concerne un cathéter qui peut empêcher une interférence entre ses composants internes et empêcher que la tige du cathéter ne se torde. Ce cathéter (1) est pourvu : d'un élément tubulaire (4) ayant une ou plusieurs lumières; d'un élément d'irrigation (6) qui est prévu au niveau du côté d'extrémité distale par rapport à l'élément tubulaire (4), de manière à être espacé de l'élément tubulaire (4) et qui a une ou plusieurs lumières; d'un fil conducteur (72, 73) qui est introduit à travers la lumière de l'élément tubulaire (4) et la lumière de l'élément d'irrigation (6); d'un tube transparent (7A) qui est prévu entre l'élément tubulaire (4) et l'élément d'irrigation (6) et à travers lequel le fil conducteur (72, 73) est passé; et d'une partie de résine durcie par ultraviolets (7B) remplissant un espace (CR) formé par l'élément tubulaire (4), l'élément d'irrigation (6), et le tube transparent (7A).
PCT/JP2015/080242 2015-03-31 2015-10-27 Cathéter et procédé pour sa fabrication. Ceased WO2016157586A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015073423A JP6356088B2 (ja) 2015-03-31 2015-03-31 カテーテル
JP2015-073423 2015-03-31

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WO2016157586A1 true WO2016157586A1 (fr) 2016-10-06

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PCT/JP2015/080242 Ceased WO2016157586A1 (fr) 2015-03-31 2015-10-27 Cathéter et procédé pour sa fabrication.

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