[go: up one dir, main page]

WO2025237412A1 - Cathéter endoscopique - Google Patents

Cathéter endoscopique

Info

Publication number
WO2025237412A1
WO2025237412A1 PCT/CN2025/095491 CN2025095491W WO2025237412A1 WO 2025237412 A1 WO2025237412 A1 WO 2025237412A1 CN 2025095491 W CN2025095491 W CN 2025095491W WO 2025237412 A1 WO2025237412 A1 WO 2025237412A1
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
endoscopic
catheter body
cavity
coating
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.)
Pending
Application number
PCT/CN2025/095491
Other languages
English (en)
Chinese (zh)
Inventor
李晶
郑长锐
奚杰峰
沈正华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Micro Tech Nanjing Co Ltd
Original Assignee
Micro Tech Nanjing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micro Tech Nanjing Co Ltd filed Critical Micro Tech Nanjing Co Ltd
Publication of WO2025237412A1 publication Critical patent/WO2025237412A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/015—Control of fluid supply or evacuation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes

Definitions

  • This disclosure relates to the field of medical device technology, and in particular to an endoscopic catheter.
  • endoscopes There are different types of endoscopes, including gastroscopes, colonoscopes, bronchoscopes, cystoscopes, and laparoscopes. With the development of the endoscopy industry, there is a growing demand for endoscopic catheters that can smoothly enter deeper and narrower cavities.
  • the purpose of this disclosure is to provide an endoscopic catheter that alleviates the technical problem of excessive friction between existing endoscopic catheters and human tissue.
  • the endoscopic catheter disclosed herein includes: catheter components and a hydrophilic coating
  • the catheter assembly includes a catheter tip and a catheter body
  • the tip of the catheter is connected to the proximal end of the catheter body;
  • the outer surface of the catheter body has a coating area and a transition area, the transition area being located between the coating area and the catheter tip.
  • the hydrophilic coating is disposed in the coating region, and the hydrophilic coating is configured to reduce surface friction.
  • the hydrophilic coating comprises a base layer and a top layer
  • the base layer is coated on the outer surface of the catheter body, and the top layer is coated on the base layer.
  • the top layer is coated on the bottom layer and cured.
  • the underlying material is a mixture of solvent ethanol and photoinitiator dimethyl acetone;
  • the surface layer is made of a mixture of solvent ethanol and polyvinylpyrrolidone.
  • the catheter tip includes a tip body and a connecting ring;
  • One end face of the connecting ring is connected to the front end body, and the other end face of the connecting ring is connected to the catheter body.
  • the catheter body comprises a rigid segment and a soft segment
  • One end of the soft segment is connected to the front end of the catheter, and the other end of the soft segment is connected to the hard segment.
  • the catheter body also includes a connecting tube
  • One end face of the connecting tube is connected to the rigid section, and the other end face of the connecting tube is connected to the soft section.
  • the endoscopic catheter also includes a lumen tube
  • the cavity tube is disposed in the inner cavity of the catheter body, and the outer wall of the cavity tube abuts against the inner wall of the catheter body.
  • the cavity tube has a traction channel running through its length, and the traction channel is configured to allow the traction line to pass through.
  • the cavity tube has a module channel running through it along its length, and the module channel is configured to allow the camera and its cables and optical fibers to pass through.
  • the cavity tube has a liquid injection channel running through its length.
  • the liquid injection channel is configured to allow liquid to pass through, so as to clear away obstacles that may obstruct the camera's view during the operation.
  • An instrument cavity is provided running through the cavity along its length, and the instrument cavity is configured to allow surgical instruments to pass through.
  • the length of the coated area ranges from 1 mm to 500 m.
  • the endoscopic catheter provided in this embodiment has a coating area and a transition area on the surface of the catheter body.
  • a hydrophilic coating is provided in the coating area, so that a stable hydrogel film is formed on the surface of the coating area of the catheter body. After activation by physiological saline, the hydrophilic coating has good lubricity, softness and firmness. Since the hydrophilic coating is only applied to the coating area of the catheter body and the transition area does not have a hydrophilic coating, it effectively avoids the hydrophilic coating from entering the interior of the catheter body through the connection gap between the catheter body and the catheter tip when the hydrophilic coating is applied, which would affect normal use. This alleviates the technical problem of high friction between existing endoscopic catheters and human tissue in the prior art.
  • Figure 1 is a schematic diagram of the overall structure of the endoscopic catheter provided in an embodiment of this disclosure
  • Figure 2 is a schematic diagram of the structure of the catheter component in the endoscopic catheter provided in an embodiment of this disclosure
  • Figure 3 is a cross-sectional schematic diagram of the hydrophilic coating in the endoscopic catheter provided in an embodiment of this disclosure
  • Figure 4 is a schematic diagram of the cross-section A-A in Figure 2.
  • Icons 100-Catheter component; 110-Catheter tip; 111-Tip body; 112-Connecting ring; 120-Catheter body; 121-Rigid segment; 122-Soft segment; 130-Transition area; 140-Connecting tube; 200-Hydrophilic coating; 210-Bottom layer; 220-Top layer; 300-Cavity tube; 310-Traction channel; 320-Module channel; 330-Injection channel; 340-Instrument channel.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components.
  • the endoscopic catheter provided in this embodiment includes: a catheter component 100 and a hydrophilic coating 200; the catheter component 100 includes a catheter tip 110 and a catheter body 120; the catheter tip 110 is connected to the proximal end of the catheter body 120.
  • the distal end is the end of the endoscopic catheter that extends into the human body
  • the proximal end is the end of the endoscopic catheter that is away from the human body.
  • the outer surface of the catheter body 120 has a coating area and a transition area 130.
  • the transition area 130 is located between the coating area and the catheter tip 110.
  • the hydrophilic coating 200 is disposed in the coating area, and the transition area 130 does not have a coating area.
  • the hydrophilic coating 200 is configured to reduce surface friction.
  • the hydrophilic coating 200 is activated when in contact with physiological saline, increasing the thickness of the hydrophilic coating 200 and making the hydrophilic coating 200 more lubricating.
  • the hydrophilic coating 200 includes a base layer 210 and a top layer 220; the base layer 210 is coated on the outer surface of the conduit body 120, and the top layer 220 is coated on the base layer 210.
  • the bottom layer 210 is first coated onto the catheter body 120. After the bottom layer 210 has cured, the top layer 220 is then coated onto the bottom layer 210. After the top layer 220 has cured, a hydrophilic coating 200 is formed on the catheter body 120.
  • the advantage of curing the bottom layer 210 and the top layer 220 separately is that they are more stable and less likely to fall off.
  • the bottom layer 210 is a mixture of solvent ethanol and photoinitiator dimethyl acetone; the top layer 220 is a mixture of solvent ethanol and polyvinylpyrrolidone; and the substrate of the conduit body 120 is made of polyether block polyamide material, which has good resilience and elastic recovery.
  • the hydrophilic coating 200 is only applied to the coating area. During the application of the hydrophilic coating 200, the front end 110 of the catheter is first wrapped to prevent the hydrophilic coating 200 from contacting the transition area 130 and the front end 110 of the catheter, and to prevent the hydrophilic coating 200 from entering the interior of the catheter body 120 from the connection gap between the catheter body 120 and the front end 110 of the catheter.
  • the endoscopic catheter provided in this embodiment can be used with a duodenoscope, and the length of the hydrophilic coating 200 in the coating area ranges from 1 mm to 500 mm, preferably 300 mm.
  • the catheter tip 110 includes a tip body 111 and a connecting ring 112; one end face of the connecting ring 112 is connected to the tip body 111, and the other end face of the connecting ring 112 is connected to the catheter body 120.
  • the connecting ring 112 is a ring structure.
  • the two end faces of the connecting ring 112 are connected to the front body 111 of 110 and the catheter body 120 respectively.
  • the end of the front body 111 of 110 is arc-shaped. When used in surgery, the front body 111 is inserted into the human body first, and then the catheter body 120 is inserted into the human body.
  • the endoscopic catheter provided in this embodiment forms a stable hydrogel film on the surface of the catheter body 120 by providing a coating area and a transition area 130 on the surface of the catheter body 120.
  • the hydrophilic coating 200 is provided in the coating area, which has good lubricity, softness and firmness after activation by physiological saline. Since the hydrophilic coating 200 is only coated on the coating area of the catheter body 120 and the transition area 130 does not have the hydrophilic coating 200, it effectively avoids the hydrophilic coating 200 from entering the interior of the catheter body 120 through the connection gap between the catheter body 120 and the catheter tip 110 when the hydrophilic coating 200 is applied, thus avoiding affecting normal use and alleviating the technical problem of high friction between existing endoscopic catheters and human tissue in the prior art.
  • the catheter body 120 in the endoscopic catheter provided in this embodiment includes a rigid section 121 and a soft section 122; one end of the soft section 122 is connected to the catheter tip 110, and the other end of the soft section 122 is connected to the rigid section 121.
  • the catheter body 120 is divided into a rigid section 121 and a soft section 122 with different hardness.
  • the soft section 122 is connected to the catheter tip 110 through a connecting ring 112.
  • the rigid section 121 is connected to the end of the soft section 122 away from the connecting ring 112.
  • the soft section 122 is inserted into the human body first.
  • the soft section 122 has better elasticity and flexibility, and is easier to bend in the human body.
  • the rigid section 121 is configured to allow the operator to apply insertion force, making it easier to insert the entire endoscopic catheter into the human body.
  • the catheter body 120 also includes a connecting tube 140; one end face of the connecting tube 140 is connected to the rigid segment 121, and the other end face of the connecting tube 140 is connected to the soft segment 122.
  • the connecting tube 140 has a cylindrical structure, and its two ends are connected to the hard section 121 and the soft section 122 respectively.
  • the function of the connecting tube 140 is to connect the hard section 121 and the soft section 122 into a whole.
  • connecting tube 140, the rigid section 121, and the soft section 122 can be connected by heat fusion to form the conduit body 120.
  • the endoscopic catheter also includes a lumen tube 300; the lumen tube 300 is disposed in the inner cavity of the catheter body 120, and the outer wall of the lumen tube 300 abuts against the inner wall of the catheter body 120.
  • the catheter body 120 and the cavity tube 300 are heat-shrinkable, with the catheter body 120 fitted onto the outer surface of the cavity tube 300.
  • the cavity tube 300 has multiple chambers running through its interior along its length, and the specific number and function of the chambers are selected according to the actual situation.
  • a traction channel 310 is provided inside the cavity tube 300 along its length.
  • the traction wire passes through the traction channel 310 and controls the direction of the catheter tip 110 and soft section 122 through the traction wire, which makes it convenient for the operator to control the entire endoscope catheter using the traction wire.
  • a module channel 320 is provided through the interior of the cavity tube 300 along its length.
  • the module channel 320 is configured to allow the camera and its cable optical fibers to pass through, providing an optical fiber light source and camera imaging.
  • an injection cavity 330 is provided through the interior of the cavity tube 300 along its length.
  • the injection cavity 330 is configured to allow liquid to pass through, so as to flush away obstacles that block the camera's field of vision during the operation, such as blood, and to flush away the blood during the operation to ensure the camera's field of vision.
  • an instrument cavity 340 is provided through the cavity tube 300 along its length.
  • the instrument cavity 340 is configured to allow surgical instruments to pass through, and instruments such as guide wires and biopsy forceps are used through the instrument cavity 340.
  • the endoscopic catheter provided in this embodiment has a hydrophilic coating 200 formed on the catheter body 120.
  • the hydrophilic coating reduces the surface friction generated by the long catheter, enabling the catheter to enter deeper and narrower cavities.
  • the hydrophilic coating 200 is formed by applying a base coat 210 and curing it, followed by applying a top coat 220 and curing it.
  • the base coat 210 treatment can make the surface properties of the substrate uniform and increase the bonding force between the top coat 220 and the base layer.
  • the embodiments of this disclosure provide an endoscopic catheter that alleviates the technical problem of high friction between existing endoscopic catheters and human tissues.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Endoscopes (AREA)

Abstract

La présente divulgation se rapporte au domaine de la technologie des dispositifs médicaux et, en particulier, à un cathéter endoscopique. Dans le cathéter endoscopique selon les modes de réalisation de la présente invention, en disposant une région de revêtement et une région de transition sur une surface d'un corps de cathéter et en disposant un revêtement hydrophile dans la région de revêtement, un film d'hydrogel stable est formé sur la surface de la région de revêtement du corps de cathéter. Après activation par une solution saline normale, le revêtement hydrophile présente un bon pouvoir lubrifiant, une bonne flexibilité et une bonne adhérence. De plus, le revêtement hydrophile n'est appliqué qu'à la région de revêtement du corps de cathéter mais pas à la région de transition, ce qui empêche efficacement le revêtement hydrophile de pénétrer à l'intérieur du corps de cathéter à travers un espace de liaison entre le corps de cathéter et une extrémité avant de cathéter pendant l'application et ainsi d'affecter une utilisation normale. La présente divulgation atténue le problème technique de l'état de la technique de frottement excessif entre les cathéters endoscopiques existants et les tissus humains.
PCT/CN2025/095491 2024-05-17 2025-05-16 Cathéter endoscopique Pending WO2025237412A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202421098034.4U CN222693350U (zh) 2024-05-17 2024-05-17 内窥镜导管
CN202421098034.4 2024-05-17

Publications (1)

Publication Number Publication Date
WO2025237412A1 true WO2025237412A1 (fr) 2025-11-20

Family

ID=95138149

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2025/095491 Pending WO2025237412A1 (fr) 2024-05-17 2025-05-16 Cathéter endoscopique

Country Status (2)

Country Link
CN (1) CN222693350U (fr)
WO (1) WO2025237412A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN222693350U (zh) * 2024-05-17 2025-04-01 南微医学科技股份有限公司 内窥镜导管

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060263404A1 (en) * 2003-02-26 2006-11-23 Nielsen Bo R Assembly for the preparation of a medical device having a coating comprising hydrogen peroxide
JP2007252593A (ja) * 2006-03-23 2007-10-04 Olympus Medical Systems Corp 内視鏡挿入補助具
CN106421934A (zh) * 2016-09-29 2017-02-22 成都德信安创新医疗技术有限公司 一种用于医疗器械表面的亲水超滑涂层的制备方法
CN215838934U (zh) * 2021-08-09 2022-02-18 上海莱因精密管材有限公司 一种内窥镜管体及具有其的内窥镜
CN116327084A (zh) * 2022-12-28 2023-06-27 上海微创悦通医疗科技有限公司 医疗内窥镜
CN116392645A (zh) * 2023-05-24 2023-07-07 惠州市顺美医疗科技有限公司 亲水润滑涂层的制备方法
CN117844276A (zh) * 2023-12-29 2024-04-09 上海安翰医疗技术有限公司 超亲水溶液、制备超亲水涂层的方法及胶囊型内窥镜
CN222693350U (zh) * 2024-05-17 2025-04-01 南微医学科技股份有限公司 内窥镜导管

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060263404A1 (en) * 2003-02-26 2006-11-23 Nielsen Bo R Assembly for the preparation of a medical device having a coating comprising hydrogen peroxide
JP2007252593A (ja) * 2006-03-23 2007-10-04 Olympus Medical Systems Corp 内視鏡挿入補助具
CN106421934A (zh) * 2016-09-29 2017-02-22 成都德信安创新医疗技术有限公司 一种用于医疗器械表面的亲水超滑涂层的制备方法
CN215838934U (zh) * 2021-08-09 2022-02-18 上海莱因精密管材有限公司 一种内窥镜管体及具有其的内窥镜
CN116327084A (zh) * 2022-12-28 2023-06-27 上海微创悦通医疗科技有限公司 医疗内窥镜
CN116392645A (zh) * 2023-05-24 2023-07-07 惠州市顺美医疗科技有限公司 亲水润滑涂层的制备方法
CN117844276A (zh) * 2023-12-29 2024-04-09 上海安翰医疗技术有限公司 超亲水溶液、制备超亲水涂层的方法及胶囊型内窥镜
CN222693350U (zh) * 2024-05-17 2025-04-01 南微医学科技股份有限公司 内窥镜导管

Also Published As

Publication number Publication date
CN222693350U (zh) 2025-04-01

Similar Documents

Publication Publication Date Title
JP7545892B2 (ja) 内視鏡
CN102770061B (zh) 插入辅助器械和内窥镜装置
US8016749B2 (en) Vision catheter having electromechanical navigation
US6962564B2 (en) Systems and methods for providing gastrointestinal pain management
JP7032751B2 (ja) 内視鏡のための方向操作可能な超音波アタッチメント
US20080208001A1 (en) Conforming endoscope
US20030036681A1 (en) Optical transesophageal echocardiography probe
JP7450055B2 (ja) 多機能カテーテル
WO2025237412A1 (fr) Cathéter endoscopique
CN117122257A (zh) 一种内窥镜器械管、远端可扩张插入部、手柄和内窥镜
US20090240109A1 (en) Flexible endoscope with core member
JP2023521171A (ja) ロッキング要素を有する内視鏡併用デバイス
US20080015508A1 (en) Telescopic wire guide
CN214912456U (zh) 一种可视化导管及带有该可视化导管的切开刀
CN212214357U (zh) 一种多功能导管
JP2025507146A (ja) 旋回照明を備える内視鏡
CN115067859A (zh) 内窥镜插管总成及内窥镜
WO2021075230A1 (fr) Ensemble d'instruments médicaux et son utilisation
CN118633894B (zh) 固定端子、牵引机构及内窥镜
US20250057397A1 (en) Instrument wetting accessory
CN223095515U (zh) 内窥镜调向装置及内窥镜
CN215959792U (zh) 内窥镜及其末端部件
CN120770751A (zh) 内窥镜导管、内窥镜及内窥镜导管的制备方法
US20240423460A1 (en) Medical systems, devices, and related methods
JP3766754B2 (ja) 医療用内視鏡