An endoscope manipulable tissue traction assisting device

By designing an endoscopically controlled tissue traction assist device adapted to existing endoscopes, using a slender flexible tube or snake-bone tube and an angle adjustment mechanism, the problems of uncontrollability and insufficient stability of existing endoscopic traction devices are solved, achieving efficient and safe lesion traction, and reducing costs and complexity.

CN122272086APending Publication Date: 2026-06-26LANZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LANZHOU UNIV
Filing Date
2026-05-07
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing endoscopic traction devices suffer from uncontrollable traction direction, insufficient stability, and susceptibility to entanglement and deviation. They are also costly, complex to operate, and difficult to adapt to conventional gastroscopy and colonoscopy, affecting the visual exposure of difficult lesions and operational safety.

Method used

Design an endoscopically controlled tissue traction assist device that uses a slender, flexible hose or snake-bone tube as the traction cannula, and is equipped with an angle adjustment mechanism and traction wire to achieve precise adjustment and stable traction of the instrument forceps channel, and is compatible with existing endoscopic systems.

Benefits of technology

It improves the controllability and stability of traction, reduces the outer diameter and cost of the device, enhances the safety and adaptability of operation, and improves the visual exposure effect of difficult lesions.

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Abstract

This invention discloses an endoscopically controlled tissue traction assist device, relating to the field of digestive endoscopy medical device technology. The endoscopically controlled tissue traction assist device includes a control handle and a traction cannula. The bottom of the control handle is connected to the traction cannula via a Luer connector. Depending on the surgical situation, the traction cannula can be configured as either a slender flexible tube or a snake-bone tube. Both the slender flexible tube and the snake-bone tube have a single, through-type instrument channel inside. The distal ends of both the slender flexible tube and the snake-bone tube are configured with smooth, flexible tips. The control handle contains an angle adjustment mechanism. In this invention, the device can be selectively replaced according to the requirements of the endoscopic surgery, offering advantages such as simplified structure, controllable angle, strong adaptability, and low cost. It can significantly improve the stability and accuracy of endoscopic traction operations.
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Description

Technical Field

[0001] This invention relates to the field of digestive endoscopy medical device technology, specifically to an endoscopically controlled tissue traction assist device. Background Technology

[0002] In minimally invasive treatments such as endoscopic submucosal dissection (ESD), submucosal tumor excision (ESE), and full-thickness resection (EFR), for lesions that are deep-seated, have poor visual exposure, or are difficult to retract, it is usually necessary to traction the lesion or surrounding tissues to obtain a good operating field and operating space.

[0003] Currently, commonly used traction methods in clinical practice include external gravity traction, metal clip combined with wire traction, and snare traction, but these generally suffer from problems such as uncontrollable traction direction, insufficient stability, and susceptibility to entanglement and displacement. Existing dual-lumen endoscopes, such as the Olympus GIF-H290T, Fuji EI-740D / S, and Pentax EG-3490TK, have two independent working channels. Their core advantages are two-handed operation, no instrument changing, high efficiency, and controllable safety, making them particularly suitable for difficult endoscopic procedures. However, their disadvantages include a thicker endoscope body, poor tolerance in some patients, more complex operation, higher learning and cost, and, in particular, the extremely high cost of endoscopes, preventing many institutions from routinely using them.

[0004] Therefore, there is an urgent clinical need for a specialized traction aid device that is structurally simple, retains only the instrument channel, allows for independent angle adjustment of the handle, and is compatible with conventional gastrointestinal endoscope biopsy channels, in order to improve the controllability and operational safety of traction for difficult lesions. Summary of the Invention

[0005] The purpose of this invention is to provide an endoscopically controlled tissue traction assist device to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This invention provides an endoscopically controlled tissue traction assist device, comprising: a control handle and a traction cannula. The bottom of the control handle is connected to the traction cannula via a Luer connector. The traction cannula is configured as either a slender, flexible tube or a snake-bone tube, depending on the surgical situation. Both the slender, flexible tube and the snake-bone tube have a single, through-type instrument channel inside.

[0008] The distal ends of the slender flexible hose and the snake-bone tube are both configured as smooth flexible head ends. The control handle is equipped with an angle adjustment mechanism, which is connected to the curved section of the slender flexible hose and the snake-bone tube through a winding and unwinding traction wire, thereby realizing the adjustment of the angle of the curved section of the slender flexible hose and the snake-bone tube.

[0009] As a preferred embodiment of the present invention, the instrument forceps channel is provided with a traction wire, and the curved sections of the slender flexible hose and the snake bone tube achieve bidirectional and four-directional bending.

[0010] As a preferred embodiment of the present invention, an angle lever knob is provided on the top of the control handle, and the traction wire is wound and unwound by the angle lever knob, which has an angle locking function.

[0011] As a preferred embodiment of the present invention, the smooth, flexible end of the slender flexible hose and the snake-bone tube is provided with a non-transparent marking, which is used for positioning under radiation.

[0012] As a preferred embodiment of the present invention, the slender flexible tube is made of a medical polymer flexible material.

[0013] In a preferred embodiment of the present invention, the snake-bone tube is composed of multiple snake-bone sleeves, the left and right sides of the top of the snake-bone sleeves protruding outwards and forming protrusions, and the interior of the protrusions is provided with arc-shaped embedding grooves.

[0014] The arc-shaped embedded groove is movably connected to an arc-shaped guide arm, which is movably connected to the outside of the protrusion and to both sides of the bottom of the snake-bone sleeve.

[0015] As a preferred embodiment of the present invention, the top of the snake-bone sleeve is further provided with upper protrusions on both sides, the upper protrusions being disposed on the sides of the protrusions and extending into the interior of the concave portions, the concave portions being formed on both sides of the bottom of the snake-bone sleeve.

[0016] The recessed portion is located on the side of the arc-shaped guide arm.

[0017] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0018] (1) Simplified structure: Only a single instrument forceps channel is retained, eliminating redundant channels in traditional endoscopes such as water injection and imaging, reducing the outer diameter of the tube, improving passability, and reducing manufacturing costs;

[0019] (2) Angle controllable: The handle can independently adjust the bending direction and angle of the distal end of the cannula, and the traction path is precise and controllable, without interfering with the operation of the endoscope body;

[0020] (3) High adaptability: It can be directly inserted into the standard gastroscopy / colonoscopy biopsy channel (by selecting a thin, flexible tube or snake bone tube), and is compatible with existing endoscopy systems without the need for additional equipment modification;

[0021] (4) Traction stability: The cannula provides a rigid guide path for traction consumables, reducing entanglement and displacement, and significantly improving the exposure effect of difficult lesions. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention after using a slender flexible hose;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention after using the snake bone tube;

[0026] Figure 3 This is a schematic diagram of the control handle of the present invention for controlling the winding and unwinding of the traction wire;

[0027] Figure 4 This is a schematic diagram of the structure of the snake bone tube in a partially connected state according to the present invention;

[0028] Figure 5 This is a partial exploded view of the snake-bone tube of the present invention;

[0029] Figure 6 This is a schematic diagram of the bending of the traction ribbon bending section of the present invention;

[0030] In the picture:

[0031] 10. Control handle; 101. Luer connector; 102. Angle lever knob;

[0032] 20. Traction sleeve; 200. Smooth flexible end; 2001. Non-transparent marking; 201. Slender flexible hose; 202. Snake-bone tube; 203. Bend section;

[0033] 2021. Snake-bone sleeve; 2022. Protrusion; 2023. Arc-shaped insert groove; 2024. Arc-shaped guide arm; 2025. Upper convex part; 2026. Concave part;

[0034] 30. Traction wire. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0036] Example 1

[0037] Please see Figures 1-6 An endoscopically controlled tissue traction assist device includes a control handle 10 and a traction sleeve 20. The bottom of the control handle 10 is connected to the traction sleeve 20 via a Luer connector 101. The traction sleeve 20 is configured as a slender flexible tube 201. The slender flexible tube 201 has a single through-hole instrument channel inside. The distal end of the slender flexible tube 201 is configured as a smooth flexible tip 200. The control handle 10 has an angle adjustment mechanism inside, and the angle adjustment mechanism is connected to the curved section 203 of the slender flexible tube 201 via a winding and unwinding traction wire 30, so as to adjust the angle of the curved section 203 of the slender flexible tube 201.

[0038] It should be noted that the slender flexible tube 201 is made of medical-grade polymer flexible material.

[0039] Furthermore, the endoscopically controlled tissue traction assist device has an overall length of 1800mm, an outer diameter of 2.4mm for the slender flexible tube 201, and an inner diameter of 1.8mm for the instrument forceps channel inside.

[0040] Furthermore, the smooth flexible head end 200 has a smooth arc structure, the bending section 203 is 30mm long, and the maximum bending angle is 180°.

[0041] Instructions for use: Insert the traction cannula 20 of this device into the vicinity of the lesion through the biopsy channel of a gastroscope or colonoscope. Adjust the angle of the curved section 203 to the target traction direction by using the angle lever knob 102 on the control handle 10. Insert the traction line 30 consumable (which can also be a biopsy forceps, snare, metal clip, etc.) through the instrument forceps channel to traction, lift, and expose the lesion. After the operation is completed, withdraw the traction line 30 and the traction auxiliary device from the body simultaneously.

[0042] Example 2

[0043] Please see Figures 1-6An endoscopically controlled tissue traction assist device includes a control handle 10 and a traction sleeve 20. The bottom of the control handle 10 is connected to the traction sleeve 20 via a Luer connector 101. The traction sleeve 20 is configured as a snake-bone tube 202, and the snake-bone tube 202 has a single through-hole instrument channel inside. The distal end of the snake-bone tube 202 is configured as a smooth and flexible tip 200. The control handle 10 is provided with an angle adjustment mechanism, and the angle adjustment mechanism is connected to the curved section 203 of the snake-bone tube 202 via a winding and unwinding traction wire 30 to adjust the angle of the curved section 203 of the snake-bone tube 202.

[0044] For details, please refer to the following: Figure 3 and Figure 6 The instrument forceps channel is equipped with a traction wire 30, and the curved section 203 of the slender flexible hose 201 and snake bone tube 202 enables bidirectional and four-directional bending.

[0045] For details, please refer to the following: Figure 3 An angle lever knob 102 is provided on the top of the control handle 10. The angle lever knob 102 is used to wind and unwind the traction wire 30. The angle lever knob 102 has an angle locking function.

[0046] In the endoscopically controlled tissue traction assist device of the present invention, ...

[0047] For details, please refer to the following: Figure 1 The smooth, flexible end 200 of the slender flexible tube 201 and the snake bone tube 202 is provided with a non-transparent mark 2001, which is used for positioning under radiation.

[0048] For details, please refer to the following: Figure 2 , Figure 4 and Figure 5 The snake bone tube 202 is composed of multiple snake bone sleeves 2021. The top left and right sides of the snake bone sleeve 2021 protrude outward and form a protrusion 2022. The protrusion 2022 has an arc-shaped embedding groove 2023 inside. The arc-shaped embedding groove 2023 is movably connected to the inside of the arc-shaped embedding groove 2023. The arc-shaped guide arm 2024 is movably connected to the outside of the protrusion 2022 and is connected to both sides of the bottom of the snake bone sleeve 2021.

[0049] In this design, the top two sides of the snake-bone sleeve 2021 are also equipped with upper protrusions 2025. The upper protrusions 2025 are located on the side of the protrusions 2022 and extend into the interior of the concave portion 2026. The concave portion 2026 is located on both sides of the bottom of the snake-bone sleeve 2021. The concave portion 2026 is located on the side of the arc-shaped guide arm 2024.

[0050] In the endoscopically controlled tissue traction assist device of the present invention, the serpentine sleeve 2021, through its movable connection, ensures that the traction sleeve 20 is flexible while maintaining high toughness and strength, enabling large angles (such as over 180°) and extremely small turning radii, allowing doctors to operate with precision, as if "driving" the endoscope around inside the body. Simultaneously, when doctors need to operate in difficult areas (such as the fundus of the stomach, cardia, duodenal tract), or even outside the digestive tract, the serpentine sleeve 2021 can actively bend under the traction of the traction wire 30, like a flexible "wrist," to deliver the lens to the required location.

[0051] It should be noted that the traction sleeve 20, which is composed of snake bone sleeve 2021, can withstand tens of thousands of bends and radial pressure of ≥100N. It has a stable structure, is not easily damaged, and is convenient for repeated use.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0053] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0054] Therefore, any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, should be covered within the protection scope of this invention.

Claims

1. An endoscopically controlled tissue traction assist device, characterized in that, include: The control handle (10) and traction cannula (20) are provided. The bottom of the control handle (10) is connected to the traction cannula (20) via a Luer connector (101). The traction cannula (20) is configured as either a slender flexible tube (201) or a snake bone tube (202) depending on the surgical situation. Both the slender flexible tube (201) and the snake bone tube (202) have a single through-hole instrument channel inside. The distal ends of the slender flexible hose (201) and the snake tube (202) are both set as smooth flexible head ends (200). The control handle (10) is provided with an angle adjustment mechanism. The angle adjustment mechanism is connected to the curved section (203) of the slender flexible hose (201) and the snake tube (202) through the winding and unwinding traction wire (30), so as to realize the adjustment of the angle of the curved section (203) of the slender flexible hose (201) and the snake tube (202).

2. The endoscopically controlled tissue traction assist device according to claim 1, characterized in that: The instrument forceps channel is provided with a traction wire (30), and the curved sections (203) of the slender flexible hose (201) and the snake bone tube (202) achieve bidirectional and four-directional bending.

3. The endoscopically controlled tissue traction assist device according to claim 1, characterized in that: The top of the control handle (10) is provided with an angle lever knob (102), which is used to wind and unwind the traction wire (30). The angle lever knob (102) has an angle locking function.

4. The endoscopically controlled tissue traction assist device according to claim 1, characterized in that: The smooth, flexible head end (200) of the slender flexible hose (201) and the snake bone tube (202) is provided with a non-transparent mark (2001), which is used for positioning under radiation.

5. The endoscopically controlled tissue traction assist device according to claim 1, characterized in that: The slender flexible tube (201) is made of medical polymer flexible material.

6. The endoscopically controlled tissue traction assist device according to claim 1, characterized in that: The snake bone tube (202) is composed of multiple snake bone sleeves (2021). The top left and right sides of the snake bone sleeves (2021) protrude outward and form a protrusion (2022). An arc-shaped embedding groove (2023) is provided inside the protrusion (2022). The arc-shaped embedded groove (2023) is movably connected to an arc-shaped guide arm (2024), which is movably connected to the outside of the protrusion (2022) and is connected to both sides of the bottom of the snake bone sleeve (2021).

7. The endoscopically controlled tissue traction assist device according to claim 6, characterized in that: The top of the snake-bone sleeve (2021) is also provided with upper protrusions (2025) on both sides. The upper protrusions (2025) are disposed on the side of the protrusion (2022) and extend into the interior of the concave portion (2026). The concave portion (2026) is formed on both sides of the bottom of the snake-bone sleeve (2021). The recessed portion (2026) is located on the side of the arc-shaped guide arm (2024).