WO2021187153A1 - Cathéter et procédé de fixation de fil électrique à un cathéter - Google Patents

Cathéter et procédé de fixation de fil électrique à un cathéter Download PDF

Info

Publication number
WO2021187153A1
WO2021187153A1 PCT/JP2021/008617 JP2021008617W WO2021187153A1 WO 2021187153 A1 WO2021187153 A1 WO 2021187153A1 JP 2021008617 W JP2021008617 W JP 2021008617W WO 2021187153 A1 WO2021187153 A1 WO 2021187153A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
electric wire
groove
catheter
communication
Prior art date
Application number
PCT/JP2021/008617
Other languages
English (en)
Japanese (ja)
Inventor
拓 周
大久保　到
Original Assignee
テルモ株式会社
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 テルモ株式会社 filed Critical テルモ株式会社
Publication of WO2021187153A1 publication Critical patent/WO2021187153A1/fr

Links

Images

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

Definitions

  • the present invention relates to a catheter having an electrode portion at the tip portion and a method for fixing an electric wire of the catheter.
  • a catheter having an electrode portion at the tip portion is known for performing treatment by ablation and the like.
  • the electrode portions are formed in a linear shape, and a plurality of electrode portions are arranged along the circumferential direction.
  • the end of the electrode portion is fixed to the electrode support.
  • the electrode support has a plurality of groove-shaped support portions in the circumferential direction, and the electrode portions are arranged on the support portions. In this state, the end of the electrode is soldered to the wire extending from the base of the catheter.
  • Patent Document 1 As a catheter having such an electrode support, for example, there is one listed in Patent Document 1.
  • the electrode support When soldering the electrode part and the electric wire, the temperature becomes high, so the electrode support may be deformed. When the electrode support is deformed, adjacent electrode portions may come close to each other to cause dielectric breakdown, or the soldered portion may break and the electrode portions may become non-conducting. Further, since the end portion of the electrode portion is projected from the electrode support and soldered at the protruding portion, the operability of soldering is not good.
  • the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a catheter and a method for fixing an electric wire of a catheter, in which the electrodes can be easily soldered and each electrode can be fixed in a state of being reliably insulated. And.
  • the catheter according to the present invention that achieves the above object has a long shaft portion and a long shaft portion.
  • An electrode portion provided at the tip of the shaft portion and An electrode support for fixing the end of the electrode portion and It has an electric wire connected to the electrode portion and
  • the electrode support has a groove portion along the length direction of the electrode portion and a hollow portion through which the electric wire can be inserted.
  • the groove portion has a communication portion that communicates with the hollow portion and allows the electric wire to be pulled out.
  • the method for fixing the electric wire of the catheter according to the present invention that achieves the above object is to use a long shaft portion and An electrode portion provided at the tip of the shaft portion and extending by a predetermined length along the axial direction of the shaft portion, and an electrode portion.
  • a groove portion along the length direction of the electrode portion and a hollow portion through which the electric wire can be inserted are formed on the outer peripheral surface of the electrode support.
  • a communication portion that communicates with the hollow portion is formed in the groove portion. With the end portion of the electrode portion arranged in the groove portion, the electric wire is pulled out from the hollow portion to the groove portion by the communication portion, and the drawn electric wire is fixed to the electrode portion.
  • the catheter configured as described above can be connected to the electric wire drawn from the communication portion while the electrode portion is supported by the groove portion, the electrode portion can be easily soldered, and each electrode portion can be connected to the groove portion. Since it can be separated reliably with, sufficient insulation can be secured.
  • the communication portion may be formed by a slit extending from the end portion of the groove portion in the length direction of the groove portion.
  • the communication portion may be formed by a through hole formed in the groove portion.
  • the electrode support can support the electrode portion at the portion before and after the length direction of the through hole.
  • the communication portion may have a width smaller than the width of the groove portion, and the groove portion may have a mounting surface portion adjacent to the communication portion in the width direction.
  • the electrode support can support the electrode portion on both sides in the width direction of the groove portion.
  • the communication portion may have a width equivalent to that of the groove portion, and the groove portion may have a mounting surface portion adjacent to the communication portion in the length direction.
  • the electrode support can support the electrode portion on both sides in the length direction of the groove portion.
  • the end in the length direction of the electrode portion may be arranged in the groove portion.
  • the electrode portions do not protrude from the electrode support in the length direction, so that contact between the electrode portions can be prevented.
  • the electrode support may fix the tip end portion of the electrode portion. As a result, in a structure in which an electric wire is connected to the tip of the electrode portion, soldering operability can be improved.
  • the electrode portion since the electrode portion is supported by the groove portion and connected to the electric wire drawn from the communication portion, the electrode portion can be easily soldered. Since each electrode portion can be reliably separated by the groove portion, sufficient insulation can be ensured.
  • the catheter 10 of the present embodiment is percutaneously inserted into the living space, contacts the living tissue of the target site, applies an electric current, and performs ablation.
  • the target of the catheter 10 of the present embodiment is a treatment in which pulmonary vein isolation is performed to ablate the entrance of the pulmonary vein over the entire circumference.
  • the catheter 10 can also be applied to other treatments.
  • the catheter 10 has an electrode portion 21 extending by a predetermined length along the axial direction of the shaft portion 20 and a balloon 22 at the tip end portion of the long tubular shaft portion 20.
  • electrode portion 21 extending by a predetermined length along the axial direction of the shaft portion 20 and a balloon 22 at the tip end portion of the long tubular shaft portion 20.
  • a hub 23 is provided at the base end of the shaft portion 20.
  • the shaft portion 20 has an outermost pipe 30, an outer pipe 31 inserted into the outermost pipe 30, and an inner pipe 32 inserted into the outer pipe 31 and having a protruding tip portion.
  • a base end member 36 for fixing the base end portion of the electrode portion 21 is provided at the tip end portion of the outermost tube 30.
  • the base end member 36 has a cylindrical shape, and a plurality of groove portions 36a along the longitudinal direction are formed on the peripheral surface along the circumferential direction.
  • the groove portion 36a has a width in which the end portion of the electrode portion 21 can be arranged.
  • 10 electrode portions 21 are provided in the circumferential direction, so 10 groove portions 36a are also provided in the circumferential direction correspondingly.
  • the inside of the base end member 36 is a hollow portion 36b through which the electric wire 38 can be inserted.
  • an electrode support 35 for fixing the tip of the electrode portion 21 is provided at the tip of the inner tube 32. As shown in FIG. 4, the electrode portion 21 can be expanded in the radial direction as the balloon 22 expands.
  • the shaft portion 20 has an electric wire 38 for applying a voltage to the electrode portion 21 along the length direction.
  • the electric wire 38 is connected to the control unit 14 at the base end portion. Further, the tip of the electric wire 38 extends to the position of the electrode support 35 and is connected to the tip of the electrode portion 21 at the electrode support 35.
  • An expansion lumen 33 is formed between the outer pipe 31 and the inner pipe 32. Further, a guide wire lumen 34 is formed inside the inner pipe 32.
  • the inner pipe 32 projects further to the tip side than the tip of the outer pipe 31.
  • the base end side end of the balloon 22 is fixed to the outer tube 31, and the tip end side end is fixed to the inner tube 32.
  • the balloon 22 can be expanded by injecting an expansion fluid into the balloon 22 via the expansion lumen 33.
  • the expansion fluid may be a gas or a liquid, and for example, a gas such as helium gas, CO 2 gas, O 2 gas, or laughing gas, or a liquid such as physiological saline, a contrast medium, or a mixture thereof can be used.
  • the outermost pipe 30, the outer pipe 31 and the inner pipe 32 are preferably formed of a material having a certain degree of flexibility.
  • a material having a certain degree of flexibility include polyolefins such as polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof, and a soft polyvinyl chloride resin.
  • fluororesins such as polyamide, polyamide elastomer, polyester, polyester elastomer, polyurethane and polytetrafluoroethylene, silicone rubber and latex rubber.
  • the balloon 22 is formed of a thin-film balloon film, and is formed of a flexible material like the outer tube 31 and the inner tube 32. Further, the strength required to surely spread the electrode portion 21 is also required. As the material of the balloon 22, the ones mentioned above for the outer tube 31 and the inner tube 32 can be used, or other materials may be used. In particular, when ablating the surface of the heart chamber at the base of a blood vessel (pulmonary vein), the blood vessel may contract due to spasm or the like if the inside of the blood vessel is ablated. Therefore, in order to ablate the heart chamber surface at the root of the blood vessel without ablating the inside of the blood vessel, the balloon expansion diameter is set to about 15 mm to 30 mm.
  • the electrode support 35 for fixing the tip of the electrode portion 21 will be described in detail.
  • the electrode support 35 has a cylindrical shape as a whole.
  • a plurality of groove portions 41 along the length direction of the electrode portion 21 are formed on the outer peripheral surface of the electrode support 35 along the circumferential direction.
  • the groove portion 41 has a width in which the end portion of the electrode portion 21 can be arranged.
  • 10 electrode portions 21 are provided in the circumferential direction, so 10 groove portions 41 are also provided in the circumferential direction correspondingly.
  • the inside of the electrode support 35 is a hollow portion 42 through which the electric wire 38 can be inserted.
  • the groove portion 41 has a communication portion 43 that communicates with the hollow portion 42 and allows the electric wire 38 to be pulled out toward the groove portion 41.
  • the communication portion 43 is formed by a slit extending from the end portion of the groove portion 41 in the length direction of the groove portion 41.
  • the communication portion 43 is formed in all the groove portions 41.
  • the communication portion 43 has a width smaller than the width of the groove portion 41. Therefore, the groove portion 41 has a mounting surface portion 41a adjacent to the communication portion 43 in the width direction.
  • the mounting surface portions 41a are formed on both sides of the communication portion 43 in the width direction.
  • the length of the mounting surface portion 41a along the axial direction is preferably 0.5 to 2 mm or more.
  • the length of the groove portion 41 along the axial direction of the portion on the base end side of the communication portion 43 is preferably 1 mm or more because it is related to the adhesive strength of the electrode portion 21.
  • the electrode support 35 is made of a material having high heat resistance and insulating properties.
  • a material having high heat resistance and insulating properties for example, polyimide, ceramic, or the like can be used as the material.
  • the electrode support 35 may be formed of a material other than this.
  • the electric wire 38 is pulled out from the hollow portion 42.
  • the end portion of the electrode portion 21 is arranged in the groove portion 41 while the electric wire 38 is inserted through the insertion hole portion 21a formed in the tip portion of the electrode portion 21.
  • the tip position of the electrode portion 21 is arranged in the groove portion 41. That is, the electrode portion 21 is arranged so as not to protrude toward the tip end side from the electrode support 35.
  • the electrode portion 21 arranged in the groove portion 41 is supported by the mounting surface portion 41a of the groove portion 41. It is desirable that the width of one side of the mounting surface portion 41a is larger than 100 ⁇ m.
  • the electric wire 38 drawn from the hollow portion 42 via the communication portion 43 protrudes from the insertion hole portion 21a of the electrode portion 21 and is fixed in the soldered portion 45 in a state of being conductive to the electrode portion 21.
  • the tip portion of the electrode portion 21 is arranged for each of the groove portions 41, and the electric wire 38 is pulled out from the hollow portion 42 and fixed by the soldering portion 45. NS.
  • the electrode portions 21 and the electrode support 35 are fixed by the adhesive.
  • the groove portion 41 of the electrode support 35 has the communication portion 43
  • the electric wire 38 of the hollow portion 42 can be pulled out from the communication portion 43 and soldered to the electrode portion 21. Since the electrode portion 21 is soldered while being supported by the mounting surface portion 41a of the groove portion 41, the operability of soldering can be improved. Further, since the electrode portions 21 can be soldered without protruding from the electrode support 35, the electrode portions 21 can be reliably insulated from each other.
  • the communication part may have another form.
  • the communication portion 46 may be formed as a through hole instead of a slit.
  • the communication portion 47 may have a triangular end, and as shown in FIG. 7 (c), the communication portion 48 has an elliptical end. It may be.
  • the communication portion may have other shapes. In any shape, the maximum width of the communicating portion needs to be larger than the diameter of the electric wire 38 in order to allow the electric wire 38 to pass through. Further, the maximum width of the communicating portion needs to be smaller than the width of the electrode portion 21 in order to form the mounting surface portion 41a adjacent to the communicating portion in the width direction.
  • the communication portion 49 may have the same width as or larger than that of the electrode portion 21.
  • a mounting surface portion 41a adjacent to the communication portion 49 in the length direction is formed.
  • the electrode portion 21 can be soldered to the electric wire 38 while being supported by the mounting surface portion 41a.
  • the catheter 10 includes a long shaft portion 20, an electrode portion 21 provided at the tip portion of the shaft portion 20, and an electrode support 35 for fixing the end portion of the electrode portion 21.
  • the electrode support 35 has a groove 41 along the length direction of the electrode portion 21 and a hollow portion 42 through which the electric wire 38 can be inserted, and the groove portion 41 is provided.
  • the electrode portion 21 can be connected to the electric wire 38 drawn from the communication portion 43 while being supported by the groove portion 41, so that the electrode portion 21 can be easily soldered, and each electrode portion 21 can be connected to the groove portion. Since it can be reliably separated at 41, sufficient insulation can be secured.
  • the communication portion 43 may be formed by a slit extending from the end portion of the groove portion 41 in the length direction of the groove portion 41. As a result, the electrode support 35 can easily pull out the electric wire 38.
  • the communication portion 43 may be formed by a through hole formed in the groove portion 41.
  • the electrode support 35 can support the electrode portion 21 at the portion before and after the length direction of the through hole.
  • the communication portion 43 may have a width smaller than the width of the groove portion 41, and the groove portion 41 may have a mounting surface portion 41a adjacent to the communication portion 43 in the width direction.
  • the electrode support 35 can support the electrode portions 21 on both sides of the groove portion 41 in the width direction.
  • the communication portion 49 may have a width equivalent to that of the groove portion 41, and the groove portion 41 may have a mounting surface portion 41a adjacent to the communication portion 49 in the length direction.
  • the electrode support 35 can support the electrode portions 21 on both sides of the groove portion 41 in the length direction.
  • the end in the length direction of the electrode portion 21 may be arranged in the groove portion 41. As a result, the electrode portion 21 does not protrude from the electrode support 35 in the length direction, so that contact between the electrode portions 21 can be prevented.
  • the electrode support 35 may fix the tip end portion of the electrode portion 21. As a result, in a structure in which the electric wire 38 is connected to the tip of the electrode portion 21, soldering operability can be improved.
  • the method for fixing the electric wire of the catheter 10 is an electrode portion 21 provided at a long shaft portion 20 and a tip portion of the shaft portion 20 and extending by a predetermined length along the axial direction of the shaft portion 20.
  • a tubular electrode support 35 that fixes the end of the electrode portion 21, and an electric wire 38 that extends from the base end portion to the tip end portion of the shaft portion 20 along the shaft portion 20 and is connected to the electrode portion 21.
  • the electrode support 35 is formed with a groove 41 along the length direction of the electrode portion 21 and a hollow portion 42 through which the electric wire 38 can be inserted on the outer peripheral surface of the electrode support 35.
  • a communication portion 43 communicating with the hollow portion 42 is formed, and in a state where the end portion of the electrode portion 21 is arranged in the groove portion 41, the electric wire 38 is pulled out from the hollow portion 42 to the groove portion 41 by the communication portion 43. , The pulled out electric wire 38 is fixed to the electrode portion 21.
  • the electrode portion 21 since the electrode portion 21 is supported by the groove portion 41 and connected to the electric wire 38 drawn from the communication portion 43, the electrode portion 21 can be easily soldered, and each electrode portion 21 can be connected to the groove portion. Since it can be reliably separated at 41, sufficient insulation can be secured.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made by those skilled in the art within the technical idea of the present invention.
  • the electrode support 35 fixes the tip end portion of the electrode portion 21, but the electrode support body 35 may fix the base end portion of the electrode portion 21.
  • the electric wire 38 is connected to the base end portion of the electrode portion 21.
  • 10 electrode portions 21 are provided, but the number of electrode portions 21 is not limited to this, and can be set to any number, and the number of groove portions 41 of the electrode support 35 is also the number of electrode portions 21. It is formed according to.
  • the catheter 10 has the balloon 22, but it does not have to have the balloon 22 as shown in FIG.
  • the electrode portion 21 has a base end portion fixed to the outermost tube 30 and a tip end portion fixed to the inner tube 32, and the outermost tube 30 is moved in the length direction with respect to the inner tube 32 to form the electrode portion 21. Can be expanded and contracted in the radial direction.

Landscapes

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

Abstract

L'invention concerne un cathéter auquel une partie électrode est facilement soudée, et auquel il est possible de fixer des électrodes de manière isolée de manière fiable.　L'invention concerne un cathéter (10) comprenant : une partie arbre (20) longue ; une partie électrode (21) qui est disposée au niveau d'une extrémité de pointe de la partie arbre (20) et qui s'étend d'une longueur prédéterminée dans une direction axiale de la partie arbre (20) ; un corps de support d'électrode cylindrique (35) auquel est fixée une partie d'extrémité de la partie électrode (21) ; et un fil électrique (38) qui s'étend le long de la partie arbre (20) depuis une extrémité de base vers l'extrémité de pointe de la partie arbre (20), et qui est reliée à la partie électrode (21), le corps de support d'électrode (35) présente une rainure (41) qui est disposée dans une surface circonférentielle externe du corps de support d'électrode (35) et qui s'étend dans une direction longitudinale de la partie électrode (21), et une section creuse (42) dans laquelle le fil électrique (38) peut être inséré, et la rainure (41) présente une section de communication (43) qui est en communication avec la section creuse (42), et à travers laquelle le fil électrique (38) peut être tiré de la section creuse (42) vers la rainure (41).
PCT/JP2021/008617 2020-03-16 2021-03-05 Cathéter et procédé de fixation de fil électrique à un cathéter WO2021187153A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020045307A JP2023053419A (ja) 2020-03-16 2020-03-16 カテーテル及びカテーテルの電線固定方法
JP2020-045307 2020-03-16

Publications (1)

Publication Number Publication Date
WO2021187153A1 true WO2021187153A1 (fr) 2021-09-23

Family

ID=77771081

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/008617 WO2021187153A1 (fr) 2020-03-16 2021-03-05 Cathéter et procédé de fixation de fil électrique à un cathéter

Country Status (2)

Country Link
JP (1) JP2023053419A (fr)
WO (1) WO2021187153A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015100706A (ja) * 2013-11-21 2015-06-04 バイオセンス・ウエブスター・（イスラエル）・リミテッドＢｉｏｓｅｎｓｅ Ｗｅｂｓｔｅｒ （Ｉｓｒａｅｌ）， Ｌｔｄ． 円環状電極及び点電極を有する多電極バルーンカテーテル
JP2018079361A (ja) * 2014-05-06 2018-05-24 セント・ジュード・メディカル，カーディオロジー・ディヴィジョン，インコーポレイテッド 電極支持構造アセンブリ
JP2020025731A (ja) * 2018-08-10 2020-02-20 テルモ株式会社 医療デバイス
WO2020196141A1 (fr) * 2019-03-26 2020-10-01 テルモ株式会社 Dispositif médical

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015100706A (ja) * 2013-11-21 2015-06-04 バイオセンス・ウエブスター・（イスラエル）・リミテッドＢｉｏｓｅｎｓｅ Ｗｅｂｓｔｅｒ （Ｉｓｒａｅｌ）， Ｌｔｄ． 円環状電極及び点電極を有する多電極バルーンカテーテル
JP2018079361A (ja) * 2014-05-06 2018-05-24 セント・ジュード・メディカル，カーディオロジー・ディヴィジョン，インコーポレイテッド 電極支持構造アセンブリ
JP2020025731A (ja) * 2018-08-10 2020-02-20 テルモ株式会社 医療デバイス
WO2020196141A1 (fr) * 2019-03-26 2020-10-01 テルモ株式会社 Dispositif médical

Also Published As

Publication number Publication date
JP2023053419A (ja) 2023-04-13

Similar Documents

Publication Publication Date Title
WO2020026217A1 (fr) Dispositif médical
JP7279018B2 (ja) 医療デバイス
JPWO2019181612A1 (ja) 医療デバイス
JP7407119B2 (ja) 医療デバイス
US9023040B2 (en) Electrosurgical cutting devices
JP2021171658A (ja) 伸縮性灌注管を有するカテーテル
JP2019213970A (ja) 専用流体経路及び針中心合わせインサートを有するアブレーションカテーテル
CN106535982B (zh) 用于流体连通的医疗设备
EP1807013B1 (fr) Materiau composite tresse a proprietes d'isolation
CN109925049A (zh) 射频消融导管及射频消融***
WO2021187153A1 (fr) Cathéter et procédé de fixation de fil électrique à un cathéter
EP4140429A1 (fr) Cathéter à panier à gaine poreuse
US20220008128A1 (en) Medical device
JP2020025731A (ja) 医療デバイス
AU2017203970A1 (en) Catheter with micro-peltier cooling components
WO2020196142A1 (fr) Dispositif médical
WO2021065872A1 (fr) Dispositif médical
JP2022120368A (ja) カテーテル
WO2021065871A1 (fr) Dispositif médical
JP2022120367A (ja) カテーテル
JP2022118793A (ja) カテーテル
JP2000262539A (ja) 高周波処置具
CN116570823A (zh) 球囊导管、球囊导管的工作方法
JP2021142210A (ja) カテーテルシステム及びカテーテルシステムの電圧印加方法
JP2021142209A (ja) カテーテルシステム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21771350

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21771350

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP