WO2022009287A1 - カテーテル - Google Patents
カテーテル Download PDFInfo
- Publication number
- WO2022009287A1 WO2022009287A1 PCT/JP2020/026490 JP2020026490W WO2022009287A1 WO 2022009287 A1 WO2022009287 A1 WO 2022009287A1 JP 2020026490 W JP2020026490 W JP 2020026490W WO 2022009287 A1 WO2022009287 A1 WO 2022009287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tip
- shaft
- catheter
- distal
- main body
- 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
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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
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
-
- 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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00831—Material properties
- A61B2017/0084—Material properties low friction
- A61B2017/00849—Material properties low friction with respect to tissue, e.g. hollow organs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with a guide wire
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22094—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for for crossing total occlusions, i.e. piercing
Definitions
- the present invention relates to a catheter.
- CTO chronic complete occlusion
- the present invention has been made based on the above requirements, and an object thereof is to provide a catheter suitable for passing through a hard part.
- the catheter has a hollow shaft and a metal tip that is connected to the tip of the shaft, wherein the tip is the tip of the tip. And the tip of the shaft, there is a diameter-expanded portion that maximizes the outer diameter in the direction perpendicular to the axial direction of the shaft, and the outer diameter of the expanded portion is outside the tip of the shaft. Larger than the diameter.
- the tip may be formed with a curved surface whose outer shape between the tip side sandwiching the enlarged diameter portion and the proximal end side gradually changes in inclination. Further, in the catheter, the tip may be formed so that the outer shape between the enlarged diameter portion and the tip of the shaft is concave outward. Further, a slit may be formed on the outer peripheral surface of the tip on the tip side of the enlarged diameter portion of the tip. Further, the outer peripheral surface of the tip may be formed with a protruding portion that extends spirally and protrudes outward in the radial direction.
- the "tip side” and “tip direction” are directions along the longitudinal direction of the catheter (direction along the axial direction of the hollow shaft), and the tip is positioned with respect to the hollow shaft. It means the side and direction to do.
- the “base end side” and the “base end direction” mean a side and a direction along the direction along the longitudinal direction of the catheter, and mean a tip side and a side and a direction opposite to the tip direction.
- the “tip” refers to the end portion on the distal end side of any member or portion, and the “base end” indicates the end portion on the proximal end side of any member or portion.
- FIG. 1 is a block diagram of a catheter according to the first embodiment.
- the catheter 1 includes a shaft 10, a connector 20 provided on the proximal end side of the shaft 10, and a tip 30 connected to the distal end side of the shaft 10.
- FIG. 2 shows the configuration near the tip of the catheter shown in FIG. 1, and in particular, is an enlarged view of the cross section of the region R.
- the shaft 10 is a hollow member and includes a coil body 11, an outer layer 12, and an inner layer 13.
- the coil body 11 is an example of a reinforcing body that reinforces the shaft 10, and is formed by spirally winding a metal wire.
- the coil body 11 may be formed by winding one wire in a spiral shape (single wire coil) or by winding a plurality of wires in a spiral shape (twisted wire coil). good.
- the coil body 11 is preferably a stranded coil.
- the metal material of the wire of the coil body 11 may be stainless steel (SUS304, SUS316, etc.), gold, platinum, tungsten, platinum, nickel, an alloy containing these elements, or the like.
- the outer layer 12 is, for example, a layer made of resin, and is provided so as to cover the outer periphery of the coil body 11.
- the resin material forming the outer layer 12 is not particularly limited, and may be, for example, polyamide, polyamide elastomer, polyester, polyurethane or the like.
- the inner layer 13 is, for example, a layer made of resin, and is provided so as to cover the inner circumference of the coil body 11.
- the resin material forming the inner layer 13 is not particularly limited, and PTFE (polytetrafluoroethylene) is preferable in consideration of slidability with an instrument (guide wire or the like) inserted inside the shaft 10.
- a hollow metal tip 30 is connected to the tip 14 of the shaft 10.
- the tip 30 includes a main body 31 and a covering layer 32.
- the main body 31 is made of a metal material.
- the metal material constituting the main body 31 is not particularly limited, and may be stainless steel (SUS304, SUS316, etc.), gold, platinum, tungsten, platinum, nickel, an alloy containing these elements, or the like.
- the tip 30 may be made of a radiation-impermeable metal material so that the position of the tip of the catheter 1 can be grasped under the fluoroscopic image.
- the coating layer 32 is, for example, a layer made of resin, and is provided so as to cover the outer periphery of the main body portion 31.
- the resin material forming the coating layer 32 is not particularly limited, and may be, for example, polyamide, polyamide elastomer, polyester, polyurethane or the like.
- the tip tip 30 has a diameter-expanded portion 33 having a maximum outer diameter in a direction perpendicular to the axial direction (longitudinal direction) of the shaft 10 between the tip and the tip portion 14 of the shaft 10.
- the outer diameter DT1 in the enlarged diameter portion 33 is larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the outer diameter of the main body 31 itself in the enlarged diameter portion 33 is also larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the tip tip 30 is formed so as to have a tapered shape in which the outer diameter decreases from the diameter-expanded portion 33 toward the tip, and the outer diameter decreases from the diameter-expanded portion 33 toward the tip portion 14 of the shaft 10. ing.
- the rear end of the tip tip 30 has the same outer diameter as the outer diameter D2, and the outer peripheral edge of the rear end is connected to the outer peripheral edge of the tip portion 14 of the shaft 10.
- the shaft 10 and the tip 30 are connected so that the outer periphery thereof is continuous.
- the tip tip 30 and the shaft 10 are formed so that at least a part of the rear end surface of the tip tip 30 and the tip surface of the shaft 10 are in contact with each other. It is joined to the tip surface. As shown in FIG. 2, the coil 11 and the main body 31 may be joined by welding to the surfaces where the metal material is in contact. Further, the coating layer 32 and the outer layer 12 may be joined by heat welding at a portion where the resin is in contact.
- the shaft 10 passes through the portion through which the enlarged diameter portion 33 of the tip tip 30 has passed.
- the outer diameter of the tip portion 14 of the shaft 10 is smaller than the outer diameter of the enlarged diameter portion 33, so that the area where the lesion site and the shaft 10 come into contact with each other is reduced.
- the contact resistance due to the shaft 10 when advancing the catheter 1 can be reduced by the amount of the reduction in the contact area, and the pushing force (push ability) of the catheter 1 can be improved.
- FIG. 3 is a configuration diagram in the vicinity of the tip of the catheter according to the second embodiment, and shows a cross section of the tip of the catheter as shown in FIG.
- the catheter 1A according to the second embodiment has a different tip shape from that of the catheter 1.
- the same parts as those in the above-described embodiment are designated by the same reference numerals, and duplicate description will be omitted.
- the tip 40 according to the second embodiment includes a main body portion 41 and a covering layer 42.
- the main body portion 41 and the covering layer 42 are the same as the main body portion 31 and the covering layer 32 except that the shapes are different.
- the tip tip 40 has a diameter-expanded portion 43 having the maximum outer diameter between the tip and the tip portion 14 of the shaft 10.
- the outer diameter DT2 in the enlarged diameter portion 43 is larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the outer diameter of the main body 41 itself in the enlarged diameter portion 43 is also larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the tip tip 40 has an outer peripheral surface 44 extending from the tip side of the diameter-expanded portion 43 to the tip portion 14 of the shaft 10 via the diameter-expanded portion 43. As shown in FIG.
- the outer peripheral surface 44 is formed of an outwardly convex curved surface, that is, a gentle curved surface whose inclination gradually changes in the vertical cross section of the catheter 1A.
- the inclination means the amount of change in the radial direction of the catheter 1A with respect to the axial length of the outer peripheral surface 44 in the longitudinal section.
- the tip 40 is more based than the enlarged diameter portion 43 and the enlarged diameter portion 43. It is possible to appropriately prevent the occurrence of damage to normal blood vessels that come into contact with the outer peripheral surface on the end side.
- FIG. 4 is a configuration diagram in the vicinity of the tip of the catheter according to the third embodiment, and shows a cross section of the tip of the catheter as shown in FIG.
- the catheter 1B according to the third embodiment has a different tip shape from that of the catheter 1.
- the same parts as those in the above-described embodiment are designated by the same reference numerals, and duplicate description will be omitted.
- the tip 50 according to the third embodiment includes a main body 51 and a covering layer 52.
- the main body portion 51 and the covering layer 52 are the same as the main body portion 31 and the covering layer 32 except that the shapes are different.
- the tip tip 50 has a diameter-expanded portion 53 having the maximum outer diameter between the tip and the tip portion 14 of the shaft 10.
- the outer diameter DT3 in the enlarged diameter portion 53 is larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the outer diameter of the main body 51 itself in the enlarged diameter portion 53 is also larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the outer peripheral surface 54 of the tip portion 14 of the shaft 10 is formed with a concave curved surface on the outer side of the enlarged diameter portion 53.
- contact with the lesion can be reduced more effectively.
- the contact resistance when advancing the catheter 1B can be reduced, and the pushing force (push ability) of the catheter 1B can be improved.
- the catheter 1B is advanced toward the distal end side, it is possible to reduce the contact of the outer peripheral surface 54 of the distal end tip 50 with a normal blood vessel, and it is possible to appropriately prevent the occurrence of damage to the blood vessel.
- FIG. 5A and 5B are configuration views of the tip of the catheter according to the fourth embodiment, FIG. 5A is a cross-sectional view of the tip, and FIG. 5B is a side view of the tip.
- the tip tip 60 according to the fourth embodiment has a slit 64 formed in the tip tip 30 according to the first embodiment.
- the tip 60 includes a main body 61 and a covering layer 62.
- the main body 61 is the same as the main body 31 except that the slit 64 is formed.
- the coating layer 62 is the same as the coating layer 32 except that it penetrates into the slit 64.
- the slit 64 is formed in a spiral shape.
- the slit 64 is provided to improve the flexibility of the main body 61 by removing the meat.
- the tip tip 60 can be bent with the same ease of bending in any direction.
- the slit 64 is formed so that the pitch becomes smaller toward the tip, and the tip region of the tip tip 60 is particularly flexible. Therefore, the risk of perforating a blood vessel can be reduced by the tip 60.
- the tip 60 is configured so that the resin of the coating layer 62 penetrates into the slit 64 of the main body 61.
- the tip tip 60 is provided with a slit 64, the tip tip 60 can be easily bent while maintaining the hardness of the tip tip 60. Further, since the outer peripheral surface of the tip tip 60 is covered with the coating layer 62, the surface of the tip tip 60 can be smoothed. As a result, the catheter provided with the tip 60 can easily pass through a hard lesion and show good followability to a winding blood vessel such as a peripheral blood vessel.
- the coating layer 62 can be firmly fixed to the main body portion 61. Therefore, it is possible to appropriately prevent the coating layer 62 from peeling from the main body 61 due to friction with the outside. As a result, the smoothness of the outer peripheral surface of the tip tip 60 can be maintained even when the tip tip 60 is passed through the hard lesion.
- FIG. 6A and 6B are configuration views of the tip of the catheter according to the fifth embodiment, FIG. 6A is a side view of the tip of the tip, and FIG. 6B is a modified example modified from the form shown in FIG. It is a side view of the said tip.
- the tip 70 includes the main body 71.
- the main body 71 is the same as the main body 31 except that the shape is different.
- the tip tip 70 has a diameter-expanded portion 72 having the maximum outer diameter between the tip and the tip portion 14 of the shaft 10.
- the enlarged diameter portion 72 has a predetermined width with respect to the axial direction of the shaft 10.
- the outer diameter of the enlarged diameter portion 72 is larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- the protruding portion 73 is provided only in the range of the enlarged diameter portion 72. According to the tip 70, since the protruding portion 73 is provided, it is possible to improve the penetration into a hard lesion site.
- the tip tip may be the tip tip 80 shown in FIG. 6 (B).
- the tip 80 includes a main body 81.
- the main body 81 is the same as the main body 31 except that the shape is different.
- the tip tip 80 has a diameter-expanded portion 82 having a maximum outer diameter between the tip and the tip portion 14 of the shaft 10.
- the enlarged diameter portion 82 has a predetermined width with respect to the axial direction of the shaft 10.
- the outer diameter of the enlarged diameter portion 82 is larger than the outer diameter DS of the tip portion 14 of the shaft 10.
- a protruding portion 83 that extends spirally and projects radially outward of the main body 81 is provided on the surface of the main body 81 of the tip tip 80.
- the protruding portion 83 is provided in a range from the tip end side of the diameter-expanded portion 82 to the rear end of the diameter-expanded portion 82. According to the tip 80, since the protruding portion 83 is provided from the tip side of the enlarged diameter portion 82, the penetration into a hard lesion site can be further improved.
- the shaft 10 has a coil body 11 as an example of the reinforcing body, but the present invention is not limited to this embodiment, and for example, a blade is adopted as the reinforcing body. You may. When a blade is used for the reinforcing body, the blade and the tip tips 30, 40, 50 may be joined by welding.
- a slit is provided in the tip tip 30 according to the first embodiment.
- the tip 30 according to the first embodiment is provided with a protruding portion.
- the present invention is not limited to this, and for example, a slit may be formed in the tip tips 40, 50, or a protrusion may be formed.
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- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Vascular Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
図1は、第1実施形態に係るカテーテルの構成図である。カテーテル1は、シャフト10と、シャフト10の基端側に設けられたコネクタ20と、シャフト10の先端側に接続された先端チップ30とを含む。
図3は、第2実施形態に係るカテーテルの先端近傍の構成図であり、図2で示したようなカテーテルの先端の断面を示してある。第2実施形態に係るカテーテル1Aは、カテーテル1とは、先端チップの形状が異なっている。前述の実施形態と同様な部分については、同一符号を付し、重複する説明を省略する。第2実施形態に係る先端チップ40は、本体部41と、被覆層42とを含む。本体部41及び被覆層42は、形状が異なること以外は、本体部31及び被覆層32と同様である。
図4は、第3実施形態に係るカテーテルの先端近傍の構成図であり、図2で示したようなカテーテルの先端の断面を示してある。第3実施形態に係るカテーテル1Bは、カテーテル1とは、先端チップの形状が異なっている。前述の実施形態と同様な部分については、同一符号を付し、重複する説明を省略する。第3実施形態に係る先端チップ50は、本体部51と、被覆層52とを含む。本体部51及び被覆層52は、形状が異なること以外は、本体部31及び被覆層32と同様である。
図5は、第4実施形態に係るカテーテルの先端チップの構成図であり、(A)は、先端チップの断面図であり、(B)は、先端チップの側面図である。第4実施形態に係る先端チップ60は、第1実施形態に係る先端チップ30に対して、スリット64を形成したものである。先端チップ60は、本体部61と、被覆層62とを含む。本体部61は、スリット64が形成されている以外は、本体部31と同様である。被覆層62は、スリット64内に入り込んでいる以外は、被覆層32と同様である。
図6は、第5実施形態に係るカテーテルの先端チップの構成図であり、(A)は、先端チップの側面図であり、(B)は、(A)に示す形態から変形した変形例に係る先端チップの側面図である。
10 シャフト
11 コイル体(補強体)
12 外層
13 内層
14 先端部
20 コネクタ
30,40,50,60,70,80 先端チップ
31,41,51,61,71,81 本体部
32,42,52,62 被覆層
33,43,53,63,72,82 拡径部
44,54 外周面
64 スリット
73,83 突出部
R 領域
DT1,DT2,DT3,DT4 拡径部の外径
DS 先端部の外径
Claims (6)
- カテーテルであって、
中空状のシャフトと、
前記シャフトの先端に接続される金属製の先端チップと、を有し、
前記先端チップは、前記先端チップの先端と、前記シャフトの先端との間において、前記シャフトの軸方向に垂直な方向の外径が最大となる拡径部を有し、
前記拡径部の前記外径は、前記シャフトの先端の外径よりも大きい
カテーテル。 - 前記先端チップは、前記拡径部を挟む先端側と基端側との間の外形を有し、前記外形は、前記カテーテルの縦断面における傾きが徐々に変化する曲面で形成されている
請求項1に記載のカテーテル。 - 前記先端チップは、前記拡径部と前記シャフトの先端との間の外形が、外側に凸状となるように形成されている
請求項1に記載のカテーテル - 前記先端チップは、前記拡径部と前記シャフトの先端との間の外形が、外側に凹状となるように形成されている
請求項1に記載のカテーテル。 - 前記先端チップの前記拡径部よりも先端側の外周面には、スリットが形成されている
請求項1乃至請求項4のいずれか一項に記載のカテーテル。 - 前記先端チップの外周面には、らせん状に延び且つ径方向外側に突出する突出部が形成されている
請求項1乃至請求項4のいずれか一項に記載のカテーテル。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022534515A JP7486585B2 (ja) | 2020-07-06 | 2020-07-06 | カテーテル |
| EP20944468.6A EP4176918B1 (en) | 2020-07-06 | 2020-07-06 | Catheter |
| PCT/JP2020/026490 WO2022009287A1 (ja) | 2020-07-06 | 2020-07-06 | カテーテル |
| CN202080102560.1A CN115734797B (zh) | 2020-07-06 | 2020-07-06 | 导管 |
| US18/076,719 US20230108332A1 (en) | 2020-07-06 | 2022-12-07 | Catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/026490 WO2022009287A1 (ja) | 2020-07-06 | 2020-07-06 | カテーテル |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US18/076,719 Continuation US20230108332A1 (en) | 2020-07-06 | 2022-12-07 | Catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022009287A1 true WO2022009287A1 (ja) | 2022-01-13 |
Family
ID=79552366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2020/026490 Ceased WO2022009287A1 (ja) | 2020-07-06 | 2020-07-06 | カテーテル |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230108332A1 (ja) |
| EP (1) | EP4176918B1 (ja) |
| JP (1) | JP7486585B2 (ja) |
| CN (1) | CN115734797B (ja) |
| WO (1) | WO2022009287A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023153470A1 (ja) * | 2022-02-10 | 2023-08-17 | 株式会社カネカ | 体内に挿入される医療用装置の遠位端部に用いられるチップ、及び医療用管状体搬送装置 |
| WO2024236627A1 (ja) * | 2023-05-12 | 2024-11-21 | 朝日インテック株式会社 | 医療デバイス |
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- 2020-07-06 WO PCT/JP2020/026490 patent/WO2022009287A1/ja not_active Ceased
- 2020-07-06 EP EP20944468.6A patent/EP4176918B1/en active Active
- 2020-07-06 CN CN202080102560.1A patent/CN115734797B/zh active Active
- 2020-07-06 JP JP2022534515A patent/JP7486585B2/ja active Active
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2022
- 2022-12-07 US US18/076,719 patent/US20230108332A1/en active Pending
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Cited By (2)
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| WO2024236627A1 (ja) * | 2023-05-12 | 2024-11-21 | 朝日インテック株式会社 | 医療デバイス |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7486585B2 (ja) | 2024-05-17 |
| EP4176918B1 (en) | 2025-08-27 |
| CN115734797B (zh) | 2025-12-05 |
| CN115734797A (zh) | 2023-03-03 |
| EP4176918A1 (en) | 2023-05-10 |
| JPWO2022009287A1 (ja) | 2022-01-13 |
| EP4176918A4 (en) | 2024-02-28 |
| US20230108332A1 (en) | 2023-04-06 |
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