WO2020059121A1 - ダイレータ - Google Patents
ダイレータ Download PDFInfo
- Publication number
- WO2020059121A1 WO2020059121A1 PCT/JP2018/035091 JP2018035091W WO2020059121A1 WO 2020059121 A1 WO2020059121 A1 WO 2020059121A1 JP 2018035091 W JP2018035091 W JP 2018035091W WO 2020059121 A1 WO2020059121 A1 WO 2020059121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil
- dilator
- hollow shaft
- coating layer
- peripheral surface
- 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
Links
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3423—Access ports, e.g. toroid shape introducers for instruments or hands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
-
- 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
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3423—Access ports, e.g. toroid shape introducers for instruments or hands
- A61B2017/3425—Access ports, e.g. toroid shape introducers for instruments or hands for internal organs, e.g. heart ports
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B2017/3433—Cannulas with different outer diameters of the cannula
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B2017/348—Means for supporting the trocar against the body or retaining the trocar inside the body
- A61B2017/3482—Means for supporting the trocar against the body or retaining the trocar inside the body inside
- A61B2017/349—Trocar with thread on outside
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
Definitions
- the present invention relates to a dilator.
- Dilators are known that expand a hole formed in a wall, such as the digestive tract of a patient, for treatment.
- the hole is expanded by inserting the tip of the dilator into the hole formed in the wall and pushing the tapered portion into the hole.
- a dilator is disclosed, for example, in Patent Document 1.
- a sufficient propulsive force cannot be secured in the tapered portion where the resistance to pushing into the hole or the constricted portion is increased, and the dilator may not be sufficiently expanded. Therefore, a configuration is conceivable in which a coil is wound around the outer periphery of the dilator to form a helical convex portion, a propulsive force is secured by a screw effect by rotation, and the dilator is advanced.
- the object of the present invention is to provide a dilator capable of suppressing that a convex portion extending in a spiral shape is displaced along a long axis direction.
- a dilator has a hollow shaft whose outer diameter increases from a distal end toward a proximal end, provided on an outer periphery of the hollow shaft, and an outer periphery of the hollow shaft.
- a convex portion spirally extending along the longitudinal direction of the hollow shaft,
- the protrusion has a gap between the protrusions adjacent to each other along the long axis direction, and a coating layer that covers an outer peripheral surface of the hollow shaft located at least in the gap is provided, and a top of the protrusion is It is exposed.
- the convex portion may be provided in contact with the outer peripheral surface of the hollow shaft, and the coating layer may be interposed between adjacent convex portions and contact the outer peripheral surface of the convex portion.
- the coating layer may cover an outer peripheral surface of the hollow shaft, and the protrusion may be provided on the coating layer.
- the hollow shaft is formed of a first coil in which one or a plurality of wires are wound in a hollow shape, and the protrusion is formed by winding one or a plurality of wires around the outer peripheral surface of the hollow shaft. It may consist of a turned second coil.
- a dilator capable of suppressing a helically extending protrusion from being displaced along a long axis direction.
- FIG. 1 is an overall view of a dilator according to an embodiment of the present invention. It is sectional drawing of the vicinity of the boundary of the taper part and base end part of a dilator. It is sectional drawing of the vicinity of the boundary of the taper part and base end part of the dilator which concerns on a modification.
- FIG. 9 is an overall view of a dilator according to a modification. It is a front-end part drawing of the dilator concerning a modification. It is a front-end part drawing of the dilator concerning a modification. It is a front-end part drawing of the dilator concerning a modification.
- FIG. 1 is an overall view of a dilator 1 according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view near the boundary between the tapered portion 2D and the base end 2C of the dilator 1 of the present embodiment.
- the left side is the distal side (distal side) to be inserted into the body
- the right side is the proximal side (hand side, proximal side) operated by a technician such as a doctor.
- a dilator 1 includes a first coil 2 formed by winding one or a plurality of metal wires into a hollow shape, and a first coil 2 (S winding) on an outer peripheral surface 2A of the first coil 2.
- a multilayer body 4 composed of a second coil 3 made of one metal strand wound in the opposite direction (Z winding), a coating layer 5 for coating the outer peripheral surface 2A of the first coil 2,
- a hollow connector 6 connected to the base end of the multilayer body 4.
- the second coil 3 may be composed of a plurality of metal wires.
- the wires constituting the first coil 2 and the second coil 3 are, for example, metal wires such as stainless steel or a superelastic alloy such as nickel-titanium, or resin wires.
- the first coil 2 is formed by winding, for example, ten metal wires made of stainless steel.
- the first coil 2 has a hollow shape in which a lumen 2B penetrating from the proximal end to the distal end is formed.
- the first coil 2 has a base portion 2C, a tapered portion 2D, and a tip portion 2E.
- the first coil 2 corresponds to a hollow shaft.
- the base end 2C is located on the base end side of the dilator 1, and the connector 6 is connected to the base end.
- the proximal end 2C has a substantially constant outer diameter from the proximal end to the distal end.
- the tapered portion 2D is located on the distal end side of the proximal end portion 2C, extends from the distal end of the proximal end portion 2C to the distal end side, and is configured such that the outer diameter decreases toward the distal end side.
- the distal end portion 2E is located on the distal end side of the tapered portion 2D, and extends from the distal end of the tapered portion 2D to the distal end side.
- the distal end portion 2E has a substantially constant outer diameter from the base end to the distal end.
- the outer diameter of the first coil 2 which is a hollow shaft increases from the distal end toward the proximal end.
- the second coil 3 has, for example, one metal wire wound around the outer peripheral surface 2A of the first coil 2 in a direction opposite to the first coil 2 (S winding) (Z winding).
- the pitch of the metal wires is not particularly limited, but on the base end side, the metal wires are closely wound with each other.
- the metal wires are loosely wound so as to be separated from each other.
- a part (sparsely wound part) of the second coil 3 that is wound apart is provided in direct contact with the outer peripheral surface 2A of the first coil 2, and the outer periphery of the first coil 2 is A convex portion 3A extending helically along the long axis direction is formed.
- the protrusion 3A has a gap 3B between the protrusions 3A adjacent to each other along the major axis direction of the first coil 2 (between adjacent metal wires).
- the dilator 1 can be moved forward by the rotation operation of the dilator 1 by the screw action of the projection 3A.
- FIG. 2 is a cross-sectional view near the boundary between the tapered portion 2D and the base end 2C of the dilator 1.
- the coating layer 5 is made of resin and covers the outer peripheral surface 2A of the first coil 2 located in the gap 3B as shown in FIG. That is, the coating layer 5 is interposed between the adjacent convex portions 3A, contacts the outer peripheral surface 3C of the convex portion 3A, and covers the outer peripheral surface 3C of the convex portion 3A.
- the top 3D of the projection 3A is exposed from the coating layer 5 to the outside.
- the top 3D is exposed to the outside from the coating layer 5 by, for example, coating the entire periphery including the top 3D of the projection 3A with a resin, and then peeling off the resin near the top 3D.
- the resin constituting the coating layer 5 include a biocompatible resin material such as a polyamide resin and a fluororesin, or a hydrophilic coating material.
- the thickness is, for example, 0.1 to 300 ⁇ m. is there.
- the length of the dilator in this embodiment and other embodiments described hereinafter is, for example, 2000 mm, preferably 1600 mm to 2500 mm, and the length of the tip 2E is, for example, 10 mm, preferably 0 to 100 mm.
- the length of the tapered portion 2D is, for example, 30 mm, preferably 5 to 100 mm.
- the inner diameter at the distal end of the first coil 2 is, for example, 0.7 mm, preferably 0.4 to 1.0 mm, and the inner diameter at the proximal end of the first coil 2 is, for example, 1.5 mm, preferably 1.0 to 3 mm. 0.0 mm.
- the outer diameter at the distal end of the second coil 3 is, for example, 1.84 mm, preferably 0.8 to 3.0 mm, and the outer diameter at the proximal end of the second coil 3 is, for example, 2.64 mm, preferably 1.4 mm. ⁇ 5.0 mm.
- the diameter of the metal wire of the first coil 2 is, for example, 0.21 mm, preferably 0.1 to 0.5 mm, and the diameter of the metal wire of the second coil 3 is, for example, 0.36 mm, preferably 0.1 to 0.5 mm.
- the connector 6, which is a gripping portion, is a part where the technician pushes the dilator into the body or performs a rotating operation.
- the distal end of the connector 6 is connected to the proximal end of the first coil 2 and the proximal end of the second coil 3.
- the connector 6 is made of resin and has a hollow shape having a lumen communicating with the lumen 2 ⁇ / b> B of the first coil 2.
- the helically extending protrusion 3A is displaced along the long axis direction. Can be suppressed.
- the coating layer 5 is interposed between the adjacent convex portions 3A and is in contact with the outer peripheral surface 3C of the convex portion 3A, the convex portion 3A is further suppressed from shifting along the long axis direction. be able to.
- the slipperiness of the dilator 1 can be improved, and the first coil 2 can prevent the living tissue from biting. Since the top 3D of the projection 3A is exposed, the durability of the dilator 1 against rubbing against a living tissue or the like during rotation of the dilator 1 can be improved as compared with the case where the projection 3A is covered with the coating layer 5.
- the introduction needle is withdrawn.
- the covering layer 5 may cover the entire outer periphery 2 ⁇ / b> A of the first coil 2, and the protrusion 3 ⁇ / b> A (the second coil 3) may be provided on the covering layer 5.
- the convex portion 3A (second coil 3) is wound around the coating layer 5 while pressing the coating layer 5 inward in the radial direction of the first coil 2 by the convex portion 3A (second coil 3). Turn. Thereby, a concave portion is formed on the coating layer 5 along the convex portion 3A (second coil 3). And it becomes the structure where the convex part 3A (2nd coil 3) was fitted in this recessed part.
- the coating layer 5 is interposed between the adjacent protrusions 3A and is in contact with the outer peripheral surface 3C of the protrusion 3A, the protrusion 3A is prevented from shifting along the long axis direction. Thus, it is possible to prevent the living tissue from biting.
- the dilator 1 of the above embodiment may be a dilator 10 having a gap at a portion where the second coil 3 is adjacent to the base end of the first coil 3 along the axial direction thereof. .
- the first coil 2 which is a hollow shaft does not have to have the tip 2E, and as shown in FIG. (Silver-tin brazing material, gold-tin brazing material, etc.) may be poured in to form the substantially cylindrical hollow-shaped front end portion 7.
- a tip having the same shape as the tip 7 may be provided at the tip of the tapered portion 2D.
- the resin of the resin layer 5 may be additionally provided on the distal end side of the distal end portion 2E or the tapered portion 2D, and a distal tip made of resin may be formed on the distal end side with the extra resin.
- a chip may be formed on the distal end portion 2E or the distal end side of the tapered portion 2D using a resin material that can be melted with the resin of the resin layer 5.
- a dilator 20 in which the first coil 2 is constituted by a hollow shaft 21 formed by casting or the like may be used.
- the hollow shaft 21 has a hollow shape in which a lumen 21A penetrating from the proximal end to the distal end is formed.
- the hollow shaft 21 has a base end portion 22, a tapered portion 23, and a front end portion 24, and the outer diameter increases from the front end to the base end.
- the material forming the hollow shaft 21 is not particularly limited as long as the flexibility of the tapered portion 23 and the distal end portion 24 is ensured and the material has biocompatibility. It is an elastic alloy material or a synthetic resin such as a polyvinyl chloride resin, a urethane resin, a polyolefin resin, a polyamide resin, and a fluororesin.
- the second coil 3 is wound around the outer peripheral surface 21B of the hollow shaft 21 in the same manner as in the above embodiment. That is, the second coil 3 is provided in direct contact with the outer peripheral surface 21 ⁇ / b> B of the hollow shaft 21.
- the coating layer 5 covers the outer peripheral surface 21B of the hollow shaft 21 located in the gap 3B between the adjacent protrusions 3A. That is, the coating layer 5 is interposed between the adjacent convex portions 3A, contacts the outer peripheral surface 3C of the convex portion 3A, and covers the outer peripheral surface 3C of the convex portion 3A.
- the top 3D of the projection 3A is exposed from the coating layer 5 to the outside.
- the coating layer 5 may be coated on the entire outer circumference 21 ⁇ / b> B of the hollow shaft 21, and the projection 3 ⁇ / b> A (the second coil 3) may be provided on the coating layer 5.
- the convex portion 3A (second coil 3) is wound around the coating layer 5 while the coating layer 5 is pressed inward in the radial direction of the hollow shaft 21 by the convex portion 3A (second coil 3). I do.
- a concave portion is formed on the coating layer 5 along the convex portion 3A (second coil 3). And it becomes the structure where the convex part 3A (2nd coil 3) was fitted in this recessed part.
- the coating layer 5 is interposed between the adjacent protrusions 3A and is in contact with the outer peripheral surface 3C of the protrusion 3A, the protrusion 3A is prevented from shifting along the long axis direction. Thus, it is possible to prevent the living tissue from biting.
- the coating layer 5 that covers the outer peripheral surface 2A of the second coil 2 located in the gap 3B is also provided by the dilator 20, it is possible to prevent the helically extending convex portion 3A from shifting along the long axis direction. Can be suppressed. Since the coating layer 5 is interposed between the adjacent convex portions 3A and is in contact with the outer peripheral surface 3C of the convex portion 3A, it is possible to further suppress the deviation of the convex portion 3A along the long axis direction. it can. Since the top 3D of the projection 3A is exposed, the durability of the dilator 1 against rubbing against a living tissue or the like during rotation of the dilator 1 can be improved as compared with the case where the projection 3A is covered with the coating layer 5.
- the outer peripheral surface of the first coil 2 or the second coil 3 closely wound on the base end side of the hollow shaft 21 may be covered with a resin.
- the first coil 2 is described as a hollow coil body including ten strands.
- the number of strands is not limited to ten, and may be one or more. It may be.
- various coatings may be provided on the surface of the hollow shaft 21 (including the portion between the shaft and the spiral convex portion).
- the coating include a protective film (a typical example, a plating film) on the surface of the hollow shaft 21 and a base film for improving the adhesion between the hollow shaft 21 and the second coil 3.
- the spiral projection does not constitute a blade.
- the dilator of the present embodiment expands a hole previously formed in a target object (eg, a wall of a digestive tract such as a stomach of a patient). Therefore, if the spiral convex portion constitutes a blade, the living tissue on the inner surface of the hole is damaged.
- the helical projection has an acute angle at the radially outer end of the shaft of its cross-sectional shape (for example, the shape of the cross-section orthogonal to the spiral direction of the helical convex portion 3A shown in FIG. 2). It is preferable not to have a part. That is, the end portion preferably has, for example, an obtuse angled corner or a portion configured in a shape including a curve (eg, a curve including a part of a circle or an ellipse).
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Abstract
Description
前記凸部は、前記長軸方向に沿って隣り合う凸部間に隙間を有し、少なくとも前記隙間に位置する前記中空シャフトの外周面を被覆する被覆層が設けられ、前記凸部の頂部は露出している。
図1は、本発明の実施形態のダイレータ1の全体図である。図2は、本実施形態のダイレータ1のテーパ部2Dと基端部2Cとの境界付近の断面図である。
また、図1及び図2において、図示左側が体内に挿入される先端側(遠位側)、右側が医師等の手技者によって操作される基端側(手元側、近位側)である。
2 第1コイル
2A 外周面
3 第2コイル
3A 凸部
3B 隙間
3D 頂部
5 被覆層
21 中空シャフト
Claims (4)
- 先端から基端に向かって外径が増大する中空シャフトと、
前記中空シャフトの外周に設けられ、前記中空シャフトの外周を、前記中空シャフトの長軸方向に沿って螺旋状に延びる凸部と、を備え、
前記凸部は、前記長軸方向に沿って隣り合う凸部間に隙間を有し、
少なくとも前記隙間に位置する前記中空シャフトの外周面を被覆する被覆層が設けられ、
前記凸部の頂部は露出しているダイレータ。 - 前記凸部は、前記中空シャフトの前記外周面に接触して設けられ、
前記被覆層は、隣り合う凸部間に介在して、前記凸部の外周面に接触している、請求項1に記載のダイレータ。 - 前記被覆層は、前記中空シャフトの外周面を被覆しており、
前記凸部は、前記被覆層上に設けられている、請求項1に記載のダイレータ。 - 前記中空シャフトが、1本又は複数本の素線を中空形状に巻き回した第1コイルからなり、
前記凸部が、1本又は複数本の素線を前記中空シャフトの外周面に巻き回した第2コイルからなる請求項1から請求項3のいずれか一項に記載のダイレータ。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/035091 WO2020059121A1 (ja) | 2018-09-21 | 2018-09-21 | ダイレータ |
| EP18934183.7A EP3854327B1 (en) | 2018-09-21 | 2018-09-21 | Dilator |
| CN201880097701.8A CN112702963B (zh) | 2018-09-21 | 2018-09-21 | 扩张器 |
| JP2020547580A JP7036936B2 (ja) | 2018-09-21 | 2018-09-21 | ダイレータ |
| US17/193,640 US20210186559A1 (en) | 2018-09-21 | 2021-03-05 | Dilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/035091 WO2020059121A1 (ja) | 2018-09-21 | 2018-09-21 | ダイレータ |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17/193,640 Continuation US20210186559A1 (en) | 2018-09-21 | 2021-03-05 | Dilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020059121A1 true WO2020059121A1 (ja) | 2020-03-26 |
Family
ID=69888781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/035091 Ceased WO2020059121A1 (ja) | 2018-09-21 | 2018-09-21 | ダイレータ |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20210186559A1 (ja) |
| EP (1) | EP3854327B1 (ja) |
| JP (1) | JP7036936B2 (ja) |
| CN (1) | CN112702963B (ja) |
| WO (1) | WO2020059121A1 (ja) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115996685A (zh) * | 2020-09-03 | 2023-04-21 | 朝日英达科株式会社 | 扩张器 |
| WO2024085029A1 (ja) * | 2022-10-17 | 2024-04-25 | 朝日インテック株式会社 | 医療デバイス、コーティング方法 |
| EP4129218A4 (en) * | 2020-04-03 | 2024-05-01 | Asahi Intecc Co., Ltd. | Dilator |
| WO2024157745A1 (ja) * | 2023-01-23 | 2024-08-02 | 朝日インテック株式会社 | 医療デバイス |
| WO2024166254A1 (ja) * | 2023-02-08 | 2024-08-15 | 朝日インテック株式会社 | 医療器具 |
| WO2025062909A1 (ja) * | 2023-09-22 | 2025-03-27 | 朝日インテック株式会社 | 医療デバイス |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1095831S1 (en) * | 2023-04-07 | 2025-09-30 | Asahi Intecc Co., Ltd. | Medical dilator |
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- 2018-09-21 JP JP2020547580A patent/JP7036936B2/ja active Active
- 2018-09-21 EP EP18934183.7A patent/EP3854327B1/en active Active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4129218A4 (en) * | 2020-04-03 | 2024-05-01 | Asahi Intecc Co., Ltd. | Dilator |
| CN115996685A (zh) * | 2020-09-03 | 2023-04-21 | 朝日英达科株式会社 | 扩张器 |
| WO2024085029A1 (ja) * | 2022-10-17 | 2024-04-25 | 朝日インテック株式会社 | 医療デバイス、コーティング方法 |
| WO2024157745A1 (ja) * | 2023-01-23 | 2024-08-02 | 朝日インテック株式会社 | 医療デバイス |
| WO2024166254A1 (ja) * | 2023-02-08 | 2024-08-15 | 朝日インテック株式会社 | 医療器具 |
| WO2025062909A1 (ja) * | 2023-09-22 | 2025-03-27 | 朝日インテック株式会社 | 医療デバイス |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7036936B2 (ja) | 2022-03-15 |
| US20210186559A1 (en) | 2021-06-24 |
| CN112702963B (zh) | 2025-01-03 |
| EP3854327B1 (en) | 2024-01-10 |
| EP3854327A1 (en) | 2021-07-28 |
| JPWO2020059121A1 (ja) | 2021-08-30 |
| CN112702963A (zh) | 2021-04-23 |
| EP3854327A4 (en) | 2022-04-06 |
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