WO2022190583A1 - 電極カテーテル - Google Patents
電極カテーテル Download PDFInfo
- Publication number
- WO2022190583A1 WO2022190583A1 PCT/JP2021/048617 JP2021048617W WO2022190583A1 WO 2022190583 A1 WO2022190583 A1 WO 2022190583A1 JP 2021048617 W JP2021048617 W JP 2021048617W WO 2022190583 A1 WO2022190583 A1 WO 2022190583A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- catheter
- catheter shaft
- shaft
- distal end
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 41
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims description 98
- 239000002184 metal Substances 0.000 claims description 98
- 230000004323 axial length Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 229920005989 resin Polymers 0.000 description 86
- 239000011347 resin Substances 0.000 description 86
- 239000011247 coating layer Substances 0.000 description 39
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000000470 constituent Substances 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229920002614 Polyether block amide Polymers 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 210000003748 coronary sinus Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910001040 Beta-titanium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- RYECOJGRJDOGPP-UHFFFAOYSA-N Ethylurea Chemical compound CCNC(N)=O RYECOJGRJDOGPP-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- ZONODCCBXBRQEZ-UHFFFAOYSA-N platinum tungsten Chemical compound [W].[Pt] ZONODCCBXBRQEZ-UHFFFAOYSA-N 0.000 description 1
- 210000003492 pulmonary vein Anatomy 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
- A61B5/283—Invasive
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
- A61B2562/221—Arrangements of sensors with cables or leads, e.g. cable harnesses
- A61B2562/222—Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
- A61B2562/225—Connectors or couplings
- A61B2562/227—Sensors with electrical connectors
Definitions
- the present invention relates to electrode catheters.
- an electrode catheter introduced into the coronary sinus and the like to measure the internal potential it comprises a catheter shaft, a connector connected to the proximal end of the catheter shaft, a coil spring connected to the distal end of the catheter shaft, and the catheter shaft.
- a plurality of ring electrodes attached to the tip of the coil spring, a tip electrode attached to the tip of the coil spring, a lead wire of the ring electrode, a lead wire of the tip electrode, and a tip portion of the tip electrode are connected to the tip electrode.
- a core wire having a base end connected to a connector has been introduced (see Patent Document 1).
- Japanese Patent No. 6780162 (especially paragraph 0044, FIG. 5)
- the diameter of the electrode catheter should be further reduced (for example, the outer diameter of the shaft should be 0.41 mm or less). is requested.
- An object of the present invention is to provide a typically small-diameter electrode catheter for solving the above problems.
- the electrode catheter of the present invention comprises a catheter shaft, a connector connected to the proximal side of the catheter shaft, at least one electrode attached to the distal side of the catheter shaft, and a distal end connected to the inner peripheral surface of the electrode. and a lead wire passing through the interior of the catheter shaft and connected at its proximal end to a connector, wherein the ratio of the outer diameter of the lead wire to the outer diameter of the catheter shaft is 0.12 to 0.35. characterized by
- FIG. 1 is a front view of an electrode catheter according to a first embodiment
- FIG. FIG. 2 is a partially broken front view of a main portion (IIA portion) of the electrode catheter shown in FIG. 1
- FIG. 2 is a partially cutaway front view of a main portion (IIB portion) of the electrode catheter shown in FIG. 1
- FIG. 2 is a partially broken front view of a main portion (IIC portion) of the electrode catheter shown in FIG. 1
- FIG. 2 is a partially broken front view of a main portion (IID portion) of the electrode catheter shown in FIG. 1
- FIG. 2B is a cross-sectional view along IIIA-IIIA in FIG. 2A
- FIG. 2B is a cross-sectional view along IIIB-IIIB in FIG. 2A
- FIG. 2B is a cross-sectional view along IIIC-IIIC of FIG. 2B;
- FIG. 2D is a cross-sectional view along IIID-IIID of FIG. 2C;
- FIG. 2C is a cross-sectional view along IIIE-IIIE of FIG. 2C;
- FIG. 2B is a detailed view of the IVA part of FIG. 2A;
- FIG. 2B is a detailed view of the IVB part of FIG. 2A;
- Fig. 2 schematically shows an electrode catheter according to a second embodiment;
- Fig. 4 schematically shows an electrode catheter according to a third embodiment;
- Fig. 4 schematically shows an electrode catheter according to a third embodiment;
- the electrode catheter 100 of the first embodiment is used, for example, to measure electrical potentials at sites such as the pulmonary veins of the heart.
- the electrode catheter 100 includes a catheter shaft 10, a connector 20 connected to the proximal side of the catheter shaft 10, a coil spring 30 connected to the distal side of the catheter shaft 10, and a distal portion or distal side of the catheter shaft 10. Attached ring electrodes 41 to 45, a tip electrode 50 attached to the tip of a coil spring 30 provided at the tip portion or tip side of the catheter shaft 10, and the tip of each of the ring electrodes 41 to 45 on the inner peripheral surface.
- Lead wires 61 to 65 of ring electrodes 41 to 45 which are connected and pass through the interior of catheter shaft 10 and have their base ends connected to connector 20, and lead wires 61 to 65 of which are connected to tip electrode 50, coil spring 30 and and a core wire 70 as a lead wire of the tip electrode 50 having its base end connected to the connector 20 through the inside of the catheter shaft 10, the core wire 70 having a conductivity of 1 ⁇ 10 7 S/m or more.
- the outer diameter (D) of the catheter shaft 10 is 0.30 to 0.41 mm.
- the ratio (d1/D) of the outer diameter (d1) of the core wire 70 to the diameter (D) is 0.12-0.35, preferably 0.15-0.35.
- the electrode catheter 100 includes a catheter shaft 10, a connector 20, a coil spring 30, ring electrodes 41-45, a tip electrode 50, lead wires 61-65, and a core wire .
- the catheter shaft 10 comprises a shaft distal end 11 and a shaft proximal end 12 .
- the length (effective length) of the catheter shaft 10 is usually 800-2000 mm, preferably 1000-1600 mm, and a preferred example is 1500 mm.
- the outer diameter (D) of the catheter shaft 10 is 0.30-0.41 mm, preferably 0.33-0.37 mm, and a preferred example is 0.37 mm. Since the outer diameter (D) is 0.41 mm or less, it can be smoothly introduced into a narrow blood vessel, which was impossible or difficult to introduce with a conventional electrode catheter.
- the inner diameter of the catheter shaft 10 is 0.2 to 0.28 mm, preferably 0.22 to 0.24 mm, and a preferred example is 0.23 mm.
- the proximal end portion 12 of the catheter shaft 10 is made of a metal tube (hypotube) with a spiral slit 125 formed at the distal end portion.
- the metal tube has a single lumen structure, and stainless steel, NiTi, ⁇ -titanium, and the like are examples of the metal forming the shaft proximal end portion 12 .
- the rigidity of the metal tube is reduced to some extent and flexibility is imparted. It is possible to configure the shaft base end portion 12 that is both flexible and flexible. Moreover, as a result of imparting a certain degree of flexibility to the distal end portion of the shaft proximal end portion, a rapid change in rigidity at the boundary between the shaft proximal end portion 12 and the shaft distal end portion 11 can be mitigated.
- the length of the shaft base end portion 12 is usually 700 to 1950 mm, preferably 1200 to 1500 mm, and a preferred example is 1450 mm.
- the length of the tip portion of the metal tube in which the spiral slit 125 is formed is usually 20 to 300 mm, preferably 30 to 150 mm, and a preferred example is 30 mm.
- the shaft distal end portion 11 of the catheter shaft 10 includes a connecting structure formed by alternately connecting resin tubes 111 to 116 as nonmetallic tubes and metal rings 141 to 145 with their end surfaces in contact with each other; A resin coating layer 15 is formed so as to cover the outer peripheral surface of the connecting structure.
- the resin coating layer 15 is peeled off over the entire periphery, leaving the respective The outer peripheral surface is exposed, and the exposed outer peripheral surface constitutes the ring electrodes 41 to 45 .
- the “ring electrode” means an electrode formed by exposing at least part of the surface or outer peripheral surface of a ring-shaped “metal ring”.
- the term “ring electrode” does not only mean that the surface of the "metal ring” is exposed in a ring shape.
- the electrodes formed by exposing the surfaces of the metal rings 141 to 145 in an elliptical shape or other non-ring shape can also be applied to the ring electrodes 41 to 41 in this embodiment. is 45.
- the resin tube 111, the metal ring 141, the resin tube 112, the resin tube 112, the metal ring 141, the resin tube 112, Metal ring 142, resin tube 113, metal ring 143, resin tube 114, metal ring 144, resin tube 115, metal ring 145, and resin tube 116 are connected in this order.
- Examples of materials constituting the resin tubes 111 to 116 include polyether block amide copolymer resin (PEBAX (registered trademark)) and urethane elastomer (Pellethane (registered trademark)).
- the length of the resin tubes 111-116 is usually 1-5 mm, preferably 2-4 mm, and a preferred example is 4 mm.
- Metal rings 141 to 145 may be made of metals with good thermal conductivity, such as aluminum, copper, stainless steel, gold, and platinum. preferable.
- the width of the metal rings 141-145 is usually 0.5-2 mm, preferably 1-1.5 mm, and a preferred example is 1.2 mm.
- a resin coating layer 15 is laminated over the entire circumference of the outer peripheral surfaces of both ends of the metal rings 141 to 145 .
- the resin coating layer 15 is formed by heat-shrinking a heat-shrinkable tube, is fused with the resin tubes 111 to 116 constituting the connecting structure, and covers both ends of the metal rings 141 to 145 over the entire circumference. to keep them.
- the resin tubes 111 to 116 and the metal rings 141 to 145 have substantially the same outer diameter and inner diameter, and the shaft distal end portion 11 has substantially constant outer diameter and inner diameter over the entire length. As a result, the diameter of the shaft distal end portion 11 can be reduced, and a step is not formed on the inner peripheral surface of the shaft distal end portion 11. Therefore, when the electrode catheter 100 is manufactured, the lead wires 61 to 65 of the ring electrodes 41 to 45 or the core wire 70 can be smoothly inserted.
- the thickness of the resin coating layer 15 is usually 0.01 to 0.055 mm, preferably 0.02 to 0.03 mm.
- the length of the shaft tip portion 11 is usually 20 to 55 mm, preferably 24 to 30 mm, and a preferred example is 25 mm.
- the proximal end surface of the connecting structure (resin tube 116) and the distal end surface of the shaft proximal end portion 12 (metal tube) are in contact with each other, and the resin covering the outer peripheral surface of the connecting structure
- the coating layer 15 is formed up to the distal end portion of the metal tube where the slit 125 is formed, and connects the shaft distal end portion 11 and the shaft proximal end portion 12 .
- the connecting structure forming the shaft distal end portion 11 and the metal tube forming the shaft proximal end portion 12 have substantially the same outer diameter and inner diameter. As a result, the outer diameter and inner diameter of the catheter shaft 10 are substantially constant over the entire length.
- the proximal end surface of the connecting structure and the distal end surface of the shaft proximal end portion 12 are brought into contact with each other, and the contact portion and the outer peripheral surface of the distal end portion of the shaft proximal end portion 12 are covered with the resin coating layer 15 .
- the shaft distal end portion 11 and the shaft proximal end portion 12 can be reliably connected.
- the connecting structure constituting the shaft distal end portion 11 and the metal tube constituting the shaft proximal end portion 12 have substantially the same outer diameter and inner diameter
- the shaft distal end portion 11 and the shaft base end portion 11 have substantially the same outer diameter and inner diameter. It is possible to prevent the formation of steps on the outer peripheral surface and the inner peripheral surface of the connecting portion with the end portion 12 .
- the diameter of the catheter shaft can be reduced, and no step is formed on the inner peripheral surface of the connecting portion between the shaft distal end portion 11 and the shaft proximal end portion 12. Therefore, when the electrode catheter 100 is manufactured, the ring electrode 41 45 lead wires 61 to 65 and core wires 70 can be smoothly inserted. Furthermore, since the resin coating layer 15 is formed up to the distal end portion of the metal tube in which the slit 125 is formed, blood or the like can be prevented from flowing into the catheter shaft 10 when the electrode catheter 100 is used.
- a connector 20 is connected to the proximal side of the catheter shaft 10 (shaft proximal end portion 12).
- a coil spring 30 is connected to the distal end side of the catheter shaft 10 (shaft distal end portion 11).
- the length of the coil spring 30 is usually 5-25 mm, preferably 10-20 mm, and a preferred example is 15 mm.
- the outer diameter of the coil spring 30 is 0.25-0.35 mm, preferably 0.28-0.33 mm, and a preferred example is 0.30 mm.
- the inner diameter of the coil spring 30 is 0.15-0.29 mm, preferably 0.18-0.25 mm, and a preferred example is 0.20 mm.
- the constituent material of the coil spring 30 includes metal, platinum, tungsten, platinum-tungsten alloy, stainless steel, nickel-titanium alloy, and the like.
- the inside of the coil spring 30 is filled with a resin 80, and an insulating coating layer 85 made of the same resin as the filling resin is formed on the outer peripheral surface of the coil spring 30. be.
- an insulating coating layer 85 made of the same resin as the filling resin is formed on the outer peripheral surface of the coil spring 30.
- the proximal end surface of the coil spring 30 and the distal end surface of the connecting structure are in contact with each other, and the resin coating layer 15 covering the outer peripheral surface of the connecting structure is the coil. It is formed up to the base end portion of the spring 30 and connects the coil spring 30 and the catheter shaft 10 .
- Ring electrodes 41 to 45 are attached to the catheter shaft 10 (shaft distal end portion 11).
- the ring electrodes 41 to 45 are formed by portions of the metal rings 141 to 145 constituting the connecting structure, which are not covered with the resin coating layer 15 (portions peeled off during manufacture).
- the electrode width (axial length) of the ring electrodes 41 to 45 is usually 0.2 to 1.7 mm, preferably 0.5 to 1 mm, and a preferred example is 0.5 mm.
- the tip electrode 50 is attached to the tip of the coil spring 30 .
- the tip electrode 50 is configured by the tip portion of the fixed portion (tip rigid portion due to solder) between the coil spring 30 and the core wire 70 .
- an insulating coating layer 85 is formed on the outer peripheral surface of the coil spring 30 at the rear end portion of the fixed portion between the coil spring 30 and the core wire 70 , and the front end portion of the fixed portion is covered with an insulating coating layer 85 . Since the insulating coating layer 85 is not formed (it is peeled and removed during manufacturing), the tip portion can constitute the tip electrode 50 .
- the core wire 70 is formed by resin-coating a conductive wire made of a metal having a conductivity of 1 ⁇ 10 7 S/m or more and a tensile strength of 500 N/mm 2 or more.
- the conductivity of the metal forming core wire 70 (conductive wire) is set to 1 ⁇ 10 7 S/m or higher, preferably 4.5 ⁇ 10 7 S/m or higher. Core wires whose constituent metals have a conductivity of less than 1 ⁇ 10 7 S/m are not recommended for use as electrode leads.
- the tensile strength of the metal forming the core wire 70 is 500 N/mm 2 or more, preferably 1000 N/mm 2 or more.
- a core wire whose constituent metal has a tensile strength of less than 500 N/mm 2 does not have sufficient strength as a core wire required for an electrode catheter.
- Examples of metals that satisfy the above electrical conductivity and tensile strength include silver - copper alloys. mm 2 ).
- the outer diameter (d1) of the core wire 70 is usually 0.065-0.1 mm, preferably 0.07-0.09 mm, and a preferred example is 0.08 mm.
- the ratio (d1/D) of the outer diameter (d1) of the core wire 70 to the outer diameter (D) of the catheter shaft 10 is usually 0.12 to 0.35, preferably 0.15 to 0.35, more preferably. is 0.18 to 0.28, and a preferred example is 0.22 (0.08 mm/0.37 mm).
- the ratio (d1 2 /D 2 ) of the cross-sectional area of the core wire 70 to the cross-sectional area of the catheter shaft 10 is 0.0144-0.1225, preferably 0.0225-0.1225.
- the ratio (d1/D) is less than 0.15, sufficient strength cannot be imparted to the electrode catheter formed by inserting the core wire inside. In addition, the core wire is easily removed from the tip electrode 50 (fixed portion). On the other hand, if the ratio (d1/D) exceeds 0.35, a sufficient space for inserting the core wire inside the catheter shaft cannot be secured.
- the lead wires 61 to 65 of the ring electrodes 41 to 45 are formed by resin-coating a conductive wire composed of the same metal as that of the core wire 70 .
- the outer diameter (d2) of the lead wires 61-65 is preferably 0.05-0.08 mm, and a preferred example is 0.065 mm.
- the ratio (d2/D) of the outer diameter (d2) of the lead wires 61-65 to the outer diameter (D) of the catheter shaft 10 is 0.12-0.35, preferably 0.12-0.27. A preferred example is 0.176 (0.065 mm/0.37 mm). Also, the ratio (d2 2 /D 2 ) of the cross-sectional area of the lead wires 61-65 to the cross-sectional area of the catheter shaft 10 is 0.0144-0.1225, preferably 0.0144-0.0729.
- the core wire 70 is formed by resin-coating a conductive wire made of a metal having a conductivity of 1 ⁇ 10 7 S/m or more and a tensile strength of 500 N/mm 2 or more.
- the core wire 70 has both physical properties (strength) required for the core wire and electrical conductivity required for the lead wire.
- the core wire 70 inside the coil spring 30 and the catheter shaft 10 unlike the conventional electrode catheter, it is not necessary to arrange the core wire and the lead wire respectively, and the coil spring and the outer diameter of the catheter shaft can be adjusted.
- the value of the ratio (d1/D) is 0.15 or more, it is possible to prevent the core wire 70 from coming off the tip electrode 50 . Further, since the value of the ratio (d1/D) is 0.35 or less, the core wire 70 and the lead wires 61 to 65 can be inserted inside the catheter shaft 10 with a margin.
- a connecting structure formed by alternately connecting the resin tubes 111 to 116 and the metal rings 141 to 145 with their end faces in contact with each other, and the outer peripheral surface of this connecting structure (the ring electrodes 41 to 45 Since the shaft tip portion 11 is formed by the resin coating layer 15 that covers the area except for the formation region of the shaft tip portion 11, it is possible to substantially prevent the formation of a step on the outer peripheral surface of the shaft tip portion 11, and the shaft tip It is possible to reliably reduce the diameter of the portion 11 . Moreover, since the resin coating layer 15 is laminated on both ends of each of the metal rings 141 to 145, the ring electrodes 41 to 45 can be securely attached to the tip end portion 11 of the shaft.
- the base end surface of the coupling structure (resin tube 116) and the tip end surface of the shaft base end portion 12 (metal tube) are brought into contact with each other, and the resin coating layer 15 covering the outer peripheral surface of the coupling structure is attached to the shaft base. Since it is formed up to the distal end portion of the end portion 12 (the distal end portion of the metal tube including the region where the slit 125 is formed), the shaft distal end portion 11 and the shaft proximal end portion 12 can be reliably connected. In addition, it is possible to substantially prevent formation of a step on the outer peripheral surface of the connecting portion between the shaft distal end portion 11 and the shaft proximal end portion 12 .
- the proximal end surface of the coil spring 30 and the distal end surface of the connecting structure are in contact, and the resin coating layer 15 covering the outer peripheral surface of the connecting structure Since it is formed up to the part, the coil spring 30 and the catheter shaft 10 can be reliably connected.
- the lead wires 61 to 65 of the ring electrodes 41 to 45 are resin-coated conductive wires composed of the same metal as the constituent metal of the core wire 70, and the above ratio (d2/D) is 0.12 or more.
- the lead wires 61 to 65 have the same effect of reinforcing the catheter shaft 10 as the core wires.
- the catheter shaft 10 since the number of lead wires increases toward the proximal end side of the catheter shaft 10, the catheter shaft 10 has a core wire whose shaft strength increases toward the proximal end side and whose outer diameter becomes thicker toward the proximal end side. It has the same effect as Further, since the above ratio (d2/D) is 0.27 or less, the lead wires 61 to 65 can be passed through the inside of the catheter shaft 10 with a margin.
- FIG. 5 schematically shows the hardness gradient or strength gradient of the shaft distal end portion 11 due to the core wire 70 and the lead wires 61 to 65 described above.
- illustration of the resin tubes 111 to 116 and the resin coating layer 15 is omitted (only reference numerals are shown for the resin tubes 111 to 116).
- the coil spring 30, the first metal ring 141, the second metal ring 142, and the third metal ring are arranged from the tip (the left end in FIG. 5) of the shaft tip portion 11 toward the proximal end (the right end in FIG. 5).
- each interval between the coil spring 30 and the metal rings 141 to 145 (the axial length of each of the resin tubes 111 to 116) is, for example, 3 mm, and the axial length of each of the metal rings 141 to 145 is, for example, 0.75 mm to 0.75 mm. 1.25 mm.
- the ratio of the axial length of each metal ring 141-145 to the axial length of each resin tube 111-116 is 0. 0.25 to 0.42 is preferred.
- a core wire 70 as a lead wire of the tip electrode 50 attached to the tip of the coil spring 30 is provided in the first axial space between the coil spring 30 in which the first resin tube 111 (not shown) is provided and the first metal ring 141. extends axially.
- a first lead wire 61 of the first ring electrode 41 (first metal ring 141) extends in the axial direction.
- the core wire 70 and the lead wire 61 extending from the second axial space toward the proximal end side are provided in the third axial space between the second metal ring 142 and the third metal ring 143 in which the third resin tube 113 (not shown) is provided.
- the second lead wire 62 of the second ring electrode 42 extends axially.
- the core wire 70 and the lead wire 61 extending from the third axial space toward the proximal end side are provided.
- the third lead wire 63 of the third ring electrode 43 (third metal ring 143) extends axially.
- the core wire 70 and the lead wire 61 extending from the fourth axial space toward the proximal end side are provided.
- the fourth lead wire 64 of the fourth ring electrode 44 extends axially.
- a core wire 70 and lead wires 61, 62 extending from the fifth axial space toward the proximal end side are provided in the sixth axial space between the fifth metal ring 145 in which the sixth resin tube 116 (not shown) is provided and the metal tube 12.
- a fifth lead wire 65 of the fifth ring electrode 45 extends axially.
- a plurality of electrodes are provided in the shaft distal end portion 11 along the axial direction, and lead wires (core wires 70 and The number of first to fifth lead wires 61 to 65) is increased. Therefore, as described above, the desired hardness gradient of the catheter shaft 10, in which the tip side of the shaft distal end portion 11 can be flexibly bent and the hardness increases toward the proximal end side, can be naturally realized without using a special member. can.
- FIG. 6 schematically shows a second embodiment (corresponding to the modification of FIG. 3E) that achieves a desired hardness gradient at the shaft distal end portion 11.
- FIG. This is a cross-sectional view of the sixth axial space between the fifth metal ring 145 and the metal tube 12 in FIG. 5, and also shows the sixth resin tube 116 and the resin coating layer 15, which were omitted in FIG. there is
- the outer diameter D of the catheter shaft 10 is the outer diameter of the resin coating layer 15 positioned on the outermost circumference of the catheter shaft 10 .
- the first to fifth lead wires 61 to 65 are arranged around the central core wire 70, but in FIG. 6, the core wire 70 is arranged on substantially the same circumference as the first to fifth lead wires 61 to 65. ing.
- the core wire 70 and the first to fifth lead wires 61 to 65 can move around the positions shown in FIG.
- the outer diameter D of the catheter shaft 10 is, for example, 0.3-0.6 mm, and the cross-sectional area of the catheter shaft 10 at this time is 0.07-0.28 mm 2 .
- the outer diameter d1 of the core wire 70 is, for example, 0.08 mm, and the cross-sectional area of the core wire 70 at this time is 0.005 mm 2 .
- the outer diameter d2 of the first to fifth lead wires 61 to 65 is, for example, 0.065 mm, and the cross-sectional area of the first to fifth lead wires 61 to 65 at this time is 0.003 mm 2 .
- the ratio of the outer diameter d1 of the core wire 70 to the outer diameter D of the catheter shaft 10 (d1/D) is preferably 0.133 to 0.267.
- the cross-sectional area ratio of the core wire 70 is preferably between 0.018 and 0.072.
- the ratio (d2/D) of the outer diameter d2 of the first to fifth lead wires 61 to 65 to the outer diameter D of the catheter shaft 10 is preferably 0.108 to 0.217.
- the ratio of the cross-sectional area of the first to fifth lead wires 61-65 to the cross-sectional area of the catheter shaft 10 is preferably 0.012-0.047.
- the total cross-sectional area of the catheter shaft 10 in the sixth axial space (the space inside the sixth resin tube 116) where the core wire 70 and the first to fifth lead wires 61 to 65 are present
- the ratio of the total cross-sectional areas of the leads 70, 61-65 is 0.077-0.309.
- the ratio of the total cross-sectional areas is 0.065-0.261.
- Total cross-sectional area of all lead wires 70, 61-63 with respect to cross-sectional area of catheter shaft 10 in fourth axial space (space within fourth resin tube 114) where core wire 70 and first to third lead wires 61-63 exist ratio is 0.054 to 0.214.
- Total cross-sectional area of all lead wires 70, 61-62 with respect to the cross-sectional area of catheter shaft 10 in the third axial space (space within third resin tube 113) where core wire 70 and first and second lead wires 61-62 exist ratio is 0.042 to 0.167.
- the ratio of the total cross-sectional area of all the lead wires 70 and 61 to the cross-sectional area of the catheter shaft 10 in the second axial space (the space within the second resin tube 112) where the core wire 70 and the first lead wire 61 exist is 0.030. ⁇ 0.119.
- the ratio of the total cross-sectional area of all the lead wires 70 to the cross-sectional area of the catheter shaft 10 in the first axial space (the space inside the first resin tube 111) where the core wire 70 exists is 0.018 to 0.072.
- FIG. 7 and 8 schematically show a third embodiment in which the first to fifth metal rings 141-145 are exposed on the outer peripheral surface of the catheter shaft 10 as the first to fifth ring electrodes 41-45.
- FIG. 8 is obtained by rotating FIG. 7 about the central axis of the catheter shaft 10 by 90 degrees.
- the first to sixth resin tubes 111 to 116 are representatively indicated as the resin tube 110
- the first to fifth metal rings 141 to 145 are representatively indicated as the metal ring 140
- the first to fifth rings Electrodes 41 - 45 are representatively indicated as ring electrode 40 .
- the end surfaces of the resin tube 110 as the non-metallic tube and the metal ring 140 for forming the ring electrode 40 are in contact with each other, and are covered with the resin coating layer 15 from the outside. A linked structure is formed.
- the resin coating layer 15 has an exposure window 150 that exposes at least part of the outer peripheral surface of the metal ring 140 .
- the exposed window 150 is formed by covering the entire outer peripheral surface of the metal ring 140 (and the resin tube 110 and the like) with the resin coating layer 15 and then partially peeling off the resin coating layer 15 using a laser or the like.
- the outer peripheral surface of the metal ring 140 exposed on the outer peripheral surface of the catheter shaft 10 through the exposure window 150 becomes the ring electrode 40 .
- a plurality of exposed windows 150 ie, two ring electrodes 40 in the example of FIG. 8 are formed along the circumferential direction of the metal ring 140 .
- the resin coating layer 15 is axially connected (not interrupted by the exposure window 150). 15 itself and the strength of the connecting structure covered therewith can be increased.
- Each exposed window 150 has an axial length L1 longer than a circumferential width (arc length) W1. As shown in FIG. 7, each exposure window 150 is preferably elliptical in shape, but may have other shapes, such as rectangular, diamond, circular, and square.
- the axial length L0 of the metal ring 140 is, for example, 0.75 mm to 1.25 mm
- the axial length L1 of the major axis of the exposure window 150 is, for example, 0.35 mm to 0.65 mm
- the length L2 covered by the resin coating layer 15 on both sides of the major axis is, for example, 0.2 mm to 0.3 mm.
- the exposure to the axial length L0 of the metal ring 140 is The ratio (L1/L0) of the axial length L1 of the window 150 is preferably 0.35 to 0.65.
- the diameter W0 of the catheter shaft 10 is, for example, 0.3 mm to 0.6 mm.
- the covering width W2 of the resin covering layer 15 on both sides of the minor axis is, for example, 0.31 mm to 0.35 mm.
- the exposed window with respect to the circumference ( ⁇ W0) of the catheter shaft 10 is The ratio (W1/ ⁇ W0) of the circumferential width (W1) of 150 is preferably 0.13 to 0.52. In the example of FIG.
- the ratio (2W1/ ⁇ W0) of the total circumferential width (2W1) of the two exposed windows 150 to the circumferential length ( ⁇ W0) of the catheter shaft 10 is is preferably greater than 0.26.
- Item 1 a catheter shaft; a connector connected to the proximal end of the catheter shaft; a coil spring connected to the distal end of the catheter shaft; a ring electrode attached to the tip portion of the catheter shaft; a tip electrode attached to the tip of the coil spring; a lead wire of the ring electrode having its distal end connected to the inner peripheral surface of the ring electrode, passing through the inside of the catheter shaft and having its proximal end connected to the connector; a core wire having its distal end connected to the tip electrode, passing through the inside of the coil spring and the catheter shaft, and having its proximal end connected to the connector;
- the core wire is formed by resin-coating a conductive wire made of a metal having a conductivity of 1 ⁇ 10 7 S/m or more and a tensile strength of 500 N/mm 2 or more,
- the catheter shaft has an outer diameter (D) of 0.30 to 0.41 mm, An electrode catheter, wherein the ratio (d1/D) of the outer diameter (d1) of the core wire
- the catheter shaft is a connecting structure formed by alternately connecting a resin tube and a metal ring for forming a ring electrode having substantially the same outer diameter as the resin tube, with the end surfaces of the resin tubes in contact with each other.
- a shaft tip having a 2.
- Item 3 The shaft distal end portion is composed of the connecting structure and a resin coating layer formed so as to cover the outer peripheral surface of the connecting structure, The outer peripheral surface of the central portion in the width direction of the metal ring is exposed over the entire circumference of the metal ring without the resin coating layer being formed, 3.
- the electrode catheter according to item 2 wherein the exposed outer peripheral surface constitutes the ring electrode.
- Item 4 The proximal end surface of the coupling structure and the distal end surface of the shaft proximal end portion are in contact with each other, and the contact portion and the outer peripheral surface of at least the distal end portion of the shaft proximal end portion are covered with the resin coating layer. 4.
- the electrode catheter according to item 3 wherein the distal end of the shaft and the proximal end of the shaft are connected to each other.
- Item 5 An item characterized in that a spiral slit is formed in at least a tip portion of the shaft base end portion, and the outer peripheral surface of the shaft base end portion including the formation area of the slit is covered with the resin coating layer. 5.
- Item 6 The proximal end surface of the coil spring and the distal end surface of the connecting structure are brought into contact with each other, and the contact portion and the outer peripheral surface of the proximal end portion of the coil spring are covered with the resin coating layer. 6.
- Electrode catheter according to item 4 or 5 characterized in that the spring and the catheter shaft are connected.
- Item 7 The coil spring according to any one of items 1 to 6, wherein the inside of the coil spring is filled with resin, and an insulating coating layer made of the same resin as the filling resin is formed on the outer peripheral surface of the coil spring.
- Item 8 Item 8.
- the lead wire of the ring electrode is formed by resin-coating a conductive wire made of a metal that satisfies the conditions required for the constituent metal of the core wire, 9.
- the present invention relates to electrode catheters.
- Electrode 100 electrode catheter, 10 catheter shaft, 11 shaft tip, 110-116 resin tube, 140-145 metal ring, 12 shaft proximal end, 125 slit, 15 resin coating layer, 20 connector, 30 coil spring, 40-45 ring Electrode, 50 tip electrode, 61 to 65 lead wire, 70 core wire, 80 resin, 85 insulating coating layer, 150 exposed window.
Abstract
Description
カテーテルシャフトと、
前記カテーテルシャフトの基端側に接続されたコネクタと、
前記カテーテルシャフトの先端側に接続されたコイルスプリングと、
前記カテーテルシャフトの先端部分に装着されたリング電極と、
前記コイルスプリングの先端に装着された先端電極と、
前記リング電極の内周面にその先端が接続され、前記カテーテルシャフトの内部を通って、その基端が前記コネクタに接続された前記リング電極のリード線と、
前記先端電極にその先端が接続され、前記コイルスプリングおよび前記カテーテルシャフトの内部を通って、その基端が前記コネクタに接続されたコアワイヤとを備えてなり、
前記コアワイヤは、導電率が1×107S/m以上、引張強度が500N/mm2以上の金属から構成される導電性ワイヤを樹脂被覆してなり、
前記カテーテルシャフトの外径(D)が0.30~0.41mmであり、
前記カテーテルシャフトの外径(D)に対する前記コアワイヤの外径(d1)の比(d1/D)が0.15~0.35であることを特徴とする電極カテーテル。
項目2:
前記カテーテルシャフトは、樹脂チューブと、前記樹脂チューブと実質的に同一の外径を有するリング電極形成用の金属リングとを、各々の端面どうしを当接させて交互に連結してなる連結構造体を有するシャフト先端部と、
金属チューブからなるシャフト基端部とにより構成されていることを特徴とする項目1に記載の電極カテーテル。
項目3:
前記シャフト先端部は、前記連結構造体と、当該連結構造体の外周面を被覆するように形成された樹脂被覆層とにより構成され、
前記金属リングの幅方向の中央部分の外周面は、当該金属リングの全周にわたり、前記樹脂被覆層が形成されないで露出しており、
露出している前記外周面により前記リング電極が構成されていることを特徴とする項目2に記載の電極カテーテル。
項目4:
前記連結構造体の基端面と、前記シャフト基端部の先端面とが当接され、この当接箇所および前記シャフト基端部の少なくとも先端部分の外周面が前記樹脂被覆層によって被覆されていることにより、前記シャフト先端部と前記シャフト基端部とが接続されていることを特徴とする項目3に記載の電極カテーテル。
項目5:
前記シャフト基端部の少なくとも先端部分に螺旋状のスリットが形成され、前記スリットの形成領域を含む前記シャフト基端部の前記外周面が前記樹脂被覆層によって被覆されていることを特徴とする項目4に記載の電極カテーテル。
項目6:
前記コイルスプリングの基端面と前記連結構造体の先端面とが当接され、この当接箇所および前記コイルスプリングの基端部分の外周面が前記樹脂被覆層によって被覆されていることにより、前記コイルスプリングと前記カテーテルシャフトとが接続されていることを特徴とする項目4または5に記載の電極カテーテル。
項目7:
前記コイルスプリングの内部に樹脂が充填されているとともに、前記コイルスプリングの外周面に充填樹脂と同一樹脂による絶縁被覆層が形成されていることを特徴とする項目1~6の何れかに記載の電極カテーテル。
項目8:
前記先端電極は、前記コアワイヤと前記コイルスプリングとを固着する固着部の、前記絶縁被覆層が形成されていない先端部分によって構成されていることを特徴とする項目7に記載の電極カテーテル。
項目9:
前記リング電極の前記リード線は、前記コアワイヤの構成金属に要求される条件を具備する金属から構成される導電性ワイヤを樹脂被覆してなり、
前記カテーテルシャフトの外径(D)に対する前記リード線の外径(d2)の比(d2/D)が0.12~0.27であることを特徴とする項目1~8の何れかに記載の電極カテーテル。
Claims (16)
- カテーテルシャフトと、
前記カテーテルシャフトの基端側に接続されたコネクタと、
前記カテーテルシャフトの先端側に装着された少なくとも一つの電極と、
前記電極の内周面にその先端が接続され、前記カテーテルシャフトの内部を通って、その基端が前記コネクタに接続されたリード線とを備えてなり、
前記カテーテルシャフトの外径に対する前記リード線の外径の比が0.12~0.35であることを特徴とする電極カテーテル。 - 前記電極は、前記カテーテルシャフトの先端側に装着されたリング電極を含み、
前記カテーテルシャフトの外径に対する前記リング電極の前記リード線の外径の比が0.12~0.27であることを特徴とする請求項1に記載の電極カテーテル。 - 前記電極は、前記電極カテーテルの先端に装着された先端電極を含み、
前記カテーテルシャフトの外径に対する前記先端電極の前記リード線の外径の比が0.15~0.35であることを特徴とする請求項1または2に記載の電極カテーテル。 - カテーテルシャフトと、
前記カテーテルシャフトの基端側に接続されたコネクタと、
前記カテーテルシャフトの先端側に装着された少なくとも一つの電極と、
前記電極の内周面にその先端が接続され、前記カテーテルシャフトの内部を通って、その基端が前記コネクタに接続されたリード線とを備えてなり、
前記カテーテルシャフトの断面積に対する前記リード線の断面積の比が0.012~0.072であることを特徴とする電極カテーテル。 - 前記電極は、前記カテーテルシャフトの先端側に装着されたリング電極を含み、
前記カテーテルシャフトの断面積に対する前記リング電極の前記リード線の断面積の比が0.012~0.047であることを特徴とする請求項4に記載の電極カテーテル。 - 前記電極は、前記電極カテーテルの先端に装着された先端電極を含み、
前記カテーテルシャフトの断面積に対する前記先端電極の前記リード線の断面積の比が0.018~0.072であることを特徴とする請求項4または5に記載の電極カテーテル。 - カテーテルシャフトと、
前記カテーテルシャフトの基端側に接続されたコネクタと、
前記カテーテルシャフトの先端側に装着された電極と、
前記電極の内周面にその先端が接続され、前記カテーテルシャフトの内部を通って、その基端が前記コネクタに接続されたリード線とを備えてなり、
前記カテーテルシャフトは、非金属チューブと電極形成用の金属リングとを、各々の端面どうしを当接させて交互に連結してなる連結構造体を有することを特徴とする電極カテーテル。 - 前記連結構造体の外周面の少なくとも一部は被覆層によって被覆され、
前記被覆層は、前記金属リングの外周面の少なくとも一部を露出させる露出窓を備えることを特徴とする請求項7に記載の電極カテーテル。 - 前記露出窓は、前記カテーテルシャフトの基端と先端を結ぶ軸方向の長さが、前記金属リングの周方向の幅より長いことを特徴とする請求項8に記載の電極カテーテル。
- 前記露出窓は楕円形状であることを特徴とする請求項9に記載の電極カテーテル。
- 前記金属リングの軸方向の長さに対する前記露出窓の軸方向の長さの比が0.35~0.65であることを特徴とする請求項8から10のいずれかに記載の電極カテーテル。
- 前記カテーテルシャフトの周長に対する前記露出窓の周方向の幅の比が0.13~0.52であることを特徴とする請求項8から11のいずれかに記載の電極カテーテル。
- 前記露出窓は、前記金属リングの周方向に沿って複数形成されることを特徴とする請求項8から12のいずれかに記載の電極カテーテル。
- 前記カテーテルシャフトは、前記連結構造体の基端側に金属チューブを備え、
前記金属チューブの少なくとも先端部分に螺旋状のスリットが形成されていることを特徴とする請求項7から13のいずれかに記載の電極カテーテル。 - 前記非金属チューブの軸方向の長さに対する前記金属リングの軸方向の長さの比が0.25~0.42であることを特徴とする請求項7から14のいずれかに記載の電極カテーテル。
- 前記電極は、前記カテーテルシャフトの基端と先端を結ぶ軸方向に沿って複数設けられ、前記カテーテルシャフトの基端側に向かうほど前記リード線の本数が増えることを特徴とする請求項1から15のいずれかに記載の電極カテーテル。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014018531A (ja) * | 2012-07-20 | 2014-02-03 | Japan Lifeline Co Ltd | 電極カテーテルおよびその製造方法 |
JP2015100515A (ja) * | 2013-11-25 | 2015-06-04 | 日本ライフライン株式会社 | 先端偏向操作可能カテーテル |
JP2017148472A (ja) * | 2016-02-25 | 2017-08-31 | 日本ライフライン株式会社 | 電極カテーテル |
JP2019166169A (ja) * | 2018-03-23 | 2019-10-03 | 日本ライフライン株式会社 | 先端偏向操作可能カテーテル |
JP2020022564A (ja) * | 2018-08-06 | 2020-02-13 | ジェイソル・メディカル株式会社 | 電極カテーテルに使用されるカテーテルチューブユニットとその製造方法、カテーテルチューブ及び電極カテーテル |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140200639A1 (en) * | 2013-01-16 | 2014-07-17 | Advanced Neuromodulation Systems, Inc. | Self-expanding neurostimulation leads having broad multi-electrode arrays |
US9931046B2 (en) * | 2013-10-25 | 2018-04-03 | Ablative Solutions, Inc. | Intravascular catheter with peri-vascular nerve activity sensors |
-
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014018531A (ja) * | 2012-07-20 | 2014-02-03 | Japan Lifeline Co Ltd | 電極カテーテルおよびその製造方法 |
JP2015100515A (ja) * | 2013-11-25 | 2015-06-04 | 日本ライフライン株式会社 | 先端偏向操作可能カテーテル |
JP2017148472A (ja) * | 2016-02-25 | 2017-08-31 | 日本ライフライン株式会社 | 電極カテーテル |
JP2019166169A (ja) * | 2018-03-23 | 2019-10-03 | 日本ライフライン株式会社 | 先端偏向操作可能カテーテル |
JP2020022564A (ja) * | 2018-08-06 | 2020-02-13 | ジェイソル・メディカル株式会社 | 電極カテーテルに使用されるカテーテルチューブユニットとその製造方法、カテーテルチューブ及び電極カテーテル |
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