Drainage device for endoscope

Abstract

The utility model relates to a drainage device for an endoscope. The drainage device for an endoscope comprises: an outer tube member; the inner needle component can be contained in the outer tube component, and the inner needle component can penetrate through target tissue; the drainage component can move relative to the inner needle component and be separated from the inner needle component or the drainage component can move relative to the outer tube component and be separated from the outer tube component, so that the drainage component can enter target tissue and form a channel in the target tissue. The inner needle component penetrates through the target tissue, the drainage component is moved relative to the inner needle component and is separated from the inner needle component, or the drainage component is moved relative to the outer tube component and is separated from the outer tube component, so that the drainage component enters the target tissue to form a channel, the target tissue is drained through the channel, the operation process is simplified, and the operation efficiency is improved. And the operation risk of the surgery is reduced.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a drainage device for endoscopes. Background Art

[0002] An endoscope is an optical instrument commonly used in minimally invasive surgeries, including rigid endoscopes and flexible endoscopes. Among them, in flexible endoscope devices, there is a pipeline for instruments such as surgical forceps to pass through, and this pipeline is called the forceps channel of the endoscope. An endoscope cutting device, such as a cyst cutting knife, can enter the corresponding cyst position through the forceps channel of the endoscope to perform a puncture drainage operation.

[0003] In the related art, during a puncture drainage operation, first, a puncture needle is used to puncture the target tissue, then the puncture needle is withdrawn, a guide wire is placed, and then the cutting part is used to cut and expand along the guide wire. Finally, the cutting part is withdrawn, and a drainage stent is inserted along the guide wire for draining the target tissue. However, this method is cumbersome to operate and has a long operation time, significantly increasing the operation risk. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide a drainage device and a drainage method for endoscopes to simplify the drainage operation process and reduce the operation risk.

[0005] This application provides a drainage device for endoscopes. The drainage device for endoscopes includes: an outer tube member; an inner needle member that can be accommodated in the outer tube member and can penetrate the target tissue; and a drainage member that can move relative to the inner needle member and detach from the inner needle member, or the drainage member can move relative to the outer tube member and detach from the outer tube member, so that the drainage member can enter the target tissue and form a channel in the target tissue.

[0006] When the above drainage device for endoscopes is in use, first, the inner needle member is used to penetrate the target tissue, and then the drainage member is moved relative to the inner needle member and detached from the inner needle member, or the drainage member is moved relative to the outer tube member and detached from the outer tube member, so that the drainage member enters the target tissue and forms a channel in the target tissue. Thus, the penetrated target tissue can be directly drained through this channel, simplifying the operation process, saving operation time, and reducing the operation risk of the surgery.

[0007] In one embodiment, the drainage member is made of a superelastic material, so that the drainage member can restore its original shape after detaching from the outer tube member or the inner needle member.

[0008] In one embodiment, the original shape of the drainage member is a hollow tube with both ends curled; or, the original shape of the drainage member is a hollow tube with the cross-sectional areas of both ends of the drainage member being larger than the cross-sectional area of the middle part of the drainage member.

[0009] In one embodiment, the drainage member includes a drainage layer and a support layer. The drainage layer is disposed on the periphery of the support layer. The support layer is made of a superelastic material, so that the drainage member can return to its original shape after being separated from the outer tube member or the inner needle member.

[0010] In one embodiment, the drainage member further includes a lubricating layer. The lubricating layer is disposed on the inner side of the support layer. The lubricating layer is used to reduce the resistance when the drainage member moves relative to the outer tube member or the inner needle member.

[0011] In one embodiment, drainage portions are provided on the drainage layer. The support layer includes a plurality of support pipe sections. The drainage portions are disposed between the support pipe sections.

[0012] In one embodiment, the endoscopic drainage device further includes an insertion member. The insertion member can be received in the handle assembly. The distal end of the insertion member is connected to the drainage member. The insertion member can drive the drainage member to move axially along the outer tube member or the inner needle member, so that the drainage member is separated from the outer tube member or the inner needle member.

[0013] In one embodiment, the insertion member is detachably connected to the drainage member. There are a locked state and an unlocked state between the drainage member and the insertion member. In the locked state, the distal end of the insertion member is fixedly connected to the proximal end of the drainage member; in the unlocked state, the drainage member can be separated from the insertion member.

[0014] In one embodiment, the endoscopic drainage device further includes a recovery member. The recovery member is connected to the proximal end of the drainage member and the distal end of the insertion member.

[0015] In one embodiment, the endoscopic drainage device further includes a handle assembly. The proximal ends of the outer tube member and the inner needle member are both connected to the handle assembly. The handle assembly can drive the outer tube member to move axially along its direction. The distal end of the inner needle member is provided with a needle head capable of piercing the target tissue. The handle assembly can drive the needle head to extend out of the distal end of the outer tube member.

[0016] In one embodiment, the endoscopic drainage device further includes a locking member. The locking member is connected to the handle assembly and the insertion member. The locking member is used to lock the insertion member to prevent the insertion member from moving relative to the handle assembly.

[0017] In one embodiment, the distal end of the handle assembly is fixed to the endoscope.

[0018] In one embodiment, the handle assembly includes an inner needle handle unit and an outer tube handle unit. The inner needle handle unit is connected to the proximal end of the inner needle member. The inner needle handle unit is used to control the inner needle member to move axially along its direction. The outer tube handle unit is connected to the proximal end of the outer tube member. The outer tube handle unit is used to control the outer tube member to move axially along its direction.

[0019] In one embodiment, the inner needle member is an inner needle member that extends hollow along its axial direction so that the compatible instrument for endoscopic surgery can be inserted into or withdrawn from the inner needle member.

[0020] In one embodiment, a cutting portion is provided at the distal end of the outer tube member, and the cutting portion is used for cutting the target tissue penetrated by the inner needle member.

[0021] In one embodiment, the outer tube member sequentially includes a surface layer, a conductive layer, and an isolation layer from outside to inside. The surface layer is used to protect the conductive layer, the conductive layer is electrically connected to the cutting portion, and the isolation layer is used to isolate the cutting portion and the inner needle member. Description of the Drawings

[0022] Figure 1 Schematic diagram of a drainage device for an endoscope in an embodiment of the present application, wherein the drainage member is sleeved on the inner needle member.

[0023] Figure 2 Schematic diagram of a drainage device for an endoscope in an embodiment of the present application, wherein the drainage member is sleeved on the outer tube member.

[0024] Figure 3 Schematic diagram of a handle assembly in an embodiment of the present application.

[0025] Figure 4 Schematic diagram of a drainage member in an embodiment of the present application.

[0026] Figure 5 is Figure 4 Cross-sectional view of the drainage member in

[0027] Description of the Reference Numerals:

[0028] 100, drainage device for an endoscope; 10, outer tube member; 11, cutting portion; 12, surface layer; 13, conductive layer; 14, isolation layer; 20, inner needle member; 21, needle head portion; 30, drainage member; 31, drainage layer; 311, drainage portion; 32, support layer; 321, support pipe section; 33, lubricating layer; 40, handle assembly; 41, inner needle handle unit; 411, first core rod; 412, first handle; 413, first positioning lock; 42, outer tube handle unit; 421, second core rod; 422, second handle; 423, second positioning lock; 50, insertion member; 60, locking member. Detailed Description of the Embodiments

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0031] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0035] In particular, in the description of this application, those skilled in the art should understand that unless otherwise clearly specified and defined, the terms "proximal end" and "distal end" are relative to the operator; the "proximal end" is the end that is closer to the user in one-dimensional direction when the endoscope operation handle is held and operated, while the "distal end" is the end that is farther from the user in one-dimensional direction when the endoscope operation handle is held and operated. And those skilled in the art should understand that the "far" and "near" do not refer to the three-dimensional straight-line distance from the user.

[0036] Refer to Figure 1 , Figure 1 shows a schematic diagram of a drainage device for an endoscope in an embodiment of this application. In some embodiments, the drainage device 100 for an endoscope includes an outer tube member 10, an inner needle member 20 and a drainage member 30. The outer tube member 10 is used to accommodate the inner needle member 20 and the drainage member 30. The inner needle member 20 can be accommodated in the outer tube member 10, and the inner needle member 20 can penetrate the target tissue so as to facilitate the subsequent placement of the drainage member 30 into the target tissue. During the movement of the drainage device 100, the outer tube member 10 can protect the inner needle member 20 and the drainage member 30.

[0037] The drainage member 30 is disposed between the outer tube member 10 and the inner needle member 20. The drainage member 30 can move relative to the inner needle member 20 and separate from the inner needle member 20, or the drainage member 30 is disposed outside the outer tube member 10, and the drainage member 30 can move relative to the outer tube member 10 and separate from the outer tube member 10, so that the separated drainage member 30 can enter the target tissue and form a channel in the target tissue, and drainage of the target tissue is achieved through this channel.

[0038] When the endoscopic drainage device 100 is in use, first, the target tissue is penetrated by the inner needle member 20, and then the drainage member 30 is moved relative to the inner needle member 20 and separated from the inner needle member 20, or the drainage member 30 is moved relative to the outer tube member 10 and separated from the outer tube member 10, so that the drainage member 30 can directly drain the punctured target tissue, simplifying the surgical process, saving surgical time, and reducing the operation risk of the surgery.

[0039] It should be noted that, in addition to the drainage function, the channel formed in the target tissue by the drainage member in the present application can also be used to insert or withdraw the compatible instruments for endoscopic surgery through this channel.

[0040] In some embodiments, the drainage member 30 is made of a superelastic material, so that the drainage member 30 can automatically return to its original shape after separating from the outer tube member 10 or the inner needle member 20. The superelastic material is a material with special deformation behavior, usually a metal alloy, such as titanium-nickel (Ti-Ni) alloy, also known as shape memory alloy. The superelastic material can return to its original shape without external force after experiencing a certain deformation.

[0041] Generally, the drainage member 30 needs to have a certain flexibility and elasticity to adapt to different puncture and drainage surgical situations, and can effectively drain the accumulated liquid or gas during the surgery. The use of the superelastic material can make the drainage member 30 have good resilience and stability, thereby improving the success rate of the surgery and the comfort of the patient.

[0042] Specifically in some embodiments, refer to Figure 1 , the drainage member 30 is sleeved on the inner needle member 20 and enters the body with the inner needle member 20 to reach the target tissue site with accumulated fluid or gas. Then, the superelastic drainage member 30 can separate from the inner needle member 20 and automatically return to its original shape after the puncture and widening of the target tissue, so that the drainage member 30 can be stably fixed in the target tissue to complete the drainage process of the target tissue, which helps to reduce the damage and discomfort to the patient's tissue.

[0043] In other embodiments, the original shape of the drainage member 30 is a hollow tube, and the cross-sectional areas at both ends of the drainage member 30 are larger than the cross-sectional area in the middle of the drainage member 30. The increase in the cross-sectional areas at both ends helps to fix the drainage member 30 during the drainage process and prevent accidental detachment or displacement of the drainage member 30.

[0044] In this embodiment, in the initial state, the drainage member 30 is sleeved on the inner needle member 20, and the cross-sectional areas at each position are the same. Then, after the drainage member 30 is detached from the inner needle member 20, the cross-sectional areas at both ends of the drainage member 30 automatically increase, forming a shape with wider ends and a narrower middle, so as to facilitate the drainage member 30 to be positioned in the target tissue and drain the target tissue. Optionally, the drainage member 30 is a film-covered structure woven from wires of a superelastic material.

[0045] Feasibly, referring to Figure 2 , the drainage member 30 is sleeved on the outer tube member 10 and enters the body with the outer tube member 10 to reach the target tissue site with fluid accumulation or gas accumulation. Then, the superelastic drainage member 30 can be detached from the outer tube member 10 after puncturing and expanding the orifice of the target tissue and automatically return to its original shape, so that the drainage member 30 can be stably fixed in the target tissue, completing the drainage process of the target tissue and helping to reduce the damage and discomfort to the patient's tissue.

[0046] Combined with Figure 4 , the original shape of the drainage member 30 is a hollow tube and both ends of the drainage member 30 are curled, that is, a double-J-shaped drainage member 30 is formed. The hollow tube design can ensure the smoothness of the drainage channel inside the drainage member 30, and the bending at both ends helps to fix the drainage member 30 during the drainage process and prevent accidental detachment or displacement of the drainage member 30.

[0047] In this embodiment, in the initial state, the drainage member 30 is sleeved on the outer tube member 10 and is a tubular structure. Then, after the drainage member 30 is detached from the outer tube member 10, both ends of the drainage member 30 automatically bend and return to the double-J-shaped structure, so as to facilitate the drainage member 30 to be positioned in the target tissue and drain the target tissue.

[0048] It should be noted that as long as the drainage member 30 can achieve the drainage of the target tissue or the insertion or withdrawal of the compatible instrument for endoscopic surgery, the original shape of the drainage member 30 is not limited. For example, the drainage member 30 can also be a straight tube shape, a spherical shape, a conical shape, etc.

[0049] In some embodiments, combined with Figure 4 and Figure 5, the drainage member 30 includes a drainage layer 31 and a support layer 32. The drainage layer 31 is disposed around the support layer 32. The support layer 32 is made of a super-elastic material, enabling the drainage member 30 to restore its original shape without external force. Specifically, the support layer 32 can be tubular, so as to provide good support performance for the drainage member 30 through the elastic support tube, and the overall soft elastic support tube can reduce the irritation to the human body and improve the comfort of the patient.

[0050] The drainage layer 31 is used for drainage, so that the liquid or gas accumulated in the target tissue can enter the drainage channel of the drainage member 30 through the drainage layer 31, and then the liquid or gas is led out through the drainage channel. Feasibly, drainage parts 311 are arranged on the drainage layer 31, and the accumulated liquid or gas enters the drainage channel through the drainage parts 311. The support layer 32 is formed by a plurality of support tube sections 321. Correspondingly, the drainage parts 311 are arranged between the support tube sections 321, so as to facilitate the liquid or gas to directly enter the drainage channel without opening holes in the support layer 32, reducing the manufacturing cost of the drainage member 30. The drainage parts 311 can be drainage holes or drainage grooves, etc.

[0051] Optionally, the drainage layer 31 is formed of a polymer material. The polymer material has good biocompatibility and plasticity, so that the drainage layer 31 has good drainage performance and can effectively guide the accumulated fluid or gas out of the body.

[0052] Furthermore, the drainage member 30 further includes a lubricating layer 33. The lubricating layer 33 is disposed inside the support layer 32. The lubricating layer 33 is used to reduce the resistance when the drainage member 30 moves relative to the outer tube member 10 or the inner needle member 20 and the resistance when the drainage member 30 is sleeved on the outer tube member 10 or the inner needle member 20, and the lubricating layer 33 can reduce the possibility of bacteria breeding or blockage when the drainage member 30 is inserted into the human body. Optionally, the lubricating layer 33 is formed of a fluorine-containing highly lubricious polymer material.

[0053] Furthermore, the distal end of the inner needle member 20 is provided with a needle head 21 that can pierce the target tissue. During the movement, the needle head 21 is received in the outer tube member 10, which helps to avoid damage to normal tissues when the needle head 21 moves. The needle head 21 can extend from the distal end of the outer tube member 10, so that the needle head 21 can pierce the target tissue, thus realizing the penetration process of the target tissue.

[0054] In other embodiments, the distal end of the inner needle member 20 can be provided with an electrocautery knife. The target tissue is cut and penetrated through the electrocautery knife, and then the placement of the drainage member 30 is realized, so that the drainage member 30 can enter the target tissue and form a channel for drainage of the target tissue or for the placement or withdrawal of a compatible instrument for endoscopic surgery in the target tissue.

[0055] In some embodiments, a cutting portion 11 for cutting the target tissue is further provided at the distal end of the outer tube member 10. The cutting portion 11 can flare the punctured target tissue to facilitate the insertion of the drainage member 30. Thus, during use, the target tissue can be punctured first through the needle tip portion 21, and then the target tissue can be flared through the cutting portion 11 to facilitate placing the drainage member 30 into the target tissue.

[0056] Feasibly, referring to Figure 1 , the cutting portion 11 is selected as an electric scalpel. The electric scalpel has a fast cutting speed, good hemostatic effect, and simple operation. It can accurately cut and flare the target tissue, greatly shortening the operation time and reducing the operation risk.

[0057] Specifically in this embodiment, the outer tube member 10 sequentially includes a surface layer 12, a conductive layer 13, and an isolation layer 14 from outside to inside. The conductive layer 13 is electrically connected to the cutting portion 11, and the isolation layer 14 is used to isolate the cutting portion 11 from the inner needle member 20. The surface layer 12 is used to protect the conductive layer 13. The conductive layer 13 is electrically connected to an external power source through a wire, so that the power can be output to the cutting portion 11 through the conductive layer 13 to achieve cutting and flaring of the target tissue. When both the inner needle member and the conductive layer are made of metal materials, the sliding friction force is relatively large in the bent state. The setting of the isolation layer 14 can reduce the friction force when the inner needle member extends out of the outer tube member; and enables the current of the conductive layer 13 to be concentrated on the cutting portion 11, increasing the current density of the cutting portion 11 and enhancing the cutting performance of the cutting portion 11. It should be noted that the structure of the isolation layer 14 in this application is not limited. Any isolation layer 14 that can achieve the purpose of isolating the cutting portion 11 from the inner needle member 20 should be within the protection scope of this application.

[0058] In some embodiments, referring to Figure 1 and Figure 3 , the endoscopic drainage device 100 further includes a handle assembly 40. The proximal ends of the outer tube member 10 and the inner needle member 20 are both connected to the handle assembly 40. The handle assembly 40 can drive the outer tube member 10 to move along its axial direction, so that the outer tube member 10 can drive the cutting portion 11 to move to facilitate the cutting portion 11 to flare the punctured target tissue.

[0059] Furthermore, the handle assembly 40 can drive the needle tip portion 21 to extend out of the cutting portion 11 at the distal end of the outer tube member 10, so that the needle tip portion 21 can pierce the target tissue to achieve effective puncture of the target tissue, especially smoothly achieve puncture of two tissues away from each other.

[0060] Feasibly, the distal end of the handle assembly 40 is fixed to the forceps port of the endoscope, so that the handle assembly 40 can be relatively fixed to the endoscope, thereby improving the stability of puncture, cutting and drainage, and facilitating the smooth completion of the operation.

[0061] Specifically, the handle assembly 40 includes an inner needle handle unit 41 and an outer tube handle unit 42. The inner needle handle unit 41 is disposed at the proximal end of the outer tube handle unit 42, and the distal end of the outer tube handle unit 42 is fixed to the forceps port of the endoscope.

[0062] The inner needle handle unit 41 is connected to the proximal end of the inner needle member 20. The inner needle handle unit 41 is used to control the movement of the inner needle member 20 along its axial direction. The outer tube handle unit 42 is connected to the proximal end of the outer tube member 10. The outer tube handle unit 42 is used to control the movement of the outer tube member 10 along its axial direction.

[0063] In other embodiments not shown, the outer tube handle unit 42 is disposed at the proximal end of the inner needle handle unit 41, and the distal end of the inner needle handle unit 41 is fixed to the forceps port of the endoscope; or, the outer tube handle unit 42 and the inner needle handle unit 41 are arranged side by side.

[0064] Feasibly, the inner needle handle unit 41 includes a first core rod 411, a first handle 412 that slides along the first core rod 411, and a first positioning lock 413 that positions the relative position between the first core rod 411 and the first handle 412. The outer tube handle unit 42 includes a second core rod 421, a second handle 422 that slides along the second core rod 421, and a second positioning lock 423 that positions the relative position between the second core rod 421 and the second handle 422.

[0065] In this embodiment, when the first positioning lock 413 is loosened, the first handle 412 moves along the first core rod 411, thereby adjusting the protruding length of the inner needle member 20. After adjusting to the appropriate protruding length, it is fixed by the first positioning lock 413. When the second positioning lock 423 is loosened, the second handle 422 moves along the second core rod 421, thereby adjusting the protruding length of the outer tube member 10. After adjusting to the appropriate protruding length, it is fixed by the second positioning lock 423.

[0066] In some embodiments, referring to Figure 1 and Figure 3 , the endoscope drainage device 100 further includes an insertion member 50. The insertion member 50 passes through the handle assembly 40. The distal end of the insertion member 50 is connected to the drainage member 30. The insertion member 50 can move relative to the handle assembly 40 under an external force and drive the drainage member 30 to move along the axial direction of the inner needle member 20, so that the drainage member 30 is separated from the needle head 21, that is, by manipulating the proximal end of the insertion member 50, the position of the drainage member 30 relative to the inner needle member 20 can be adjusted, so that the drainage member 30 can be retained in the target tissue to achieve drainage of the target tissue.

[0067] Further, the implant 50 is disposed between the outer wall of the inner needle member 20 and the inner wall of the outer tube member 10, so that the distal end of the implant 50 can abut against the proximal end of the drainage member 30 and push the drainage member 30 to move relative to the inner needle member 20, realizing leaving the drainage member 30 in the target tissue. It can be understood that as long as the implant 50 can push the drainage member 30 to move, the shape of the implant 50 is not limited. For example, the implant 50 is linear, conical, tubular, etc. Further, the implant 50 may also be provided with shapes such as notches or grooves, so as to facilitate the implant 50 to maintain stability between the inner needle member 20 and the outer tube member 10.

[0068] Preferably, a part of the implant 50 is sleeved on the inner needle member 20, so that the distal end of the implant 50 and the proximal end of the drainage member 30 can have a larger contact area, which helps the implant 50 to stably push the drainage member 30 to move along the axial direction of the inner needle member 20, so that the drainage member 30 can smoothly and evenly disengage from the needle head portion 21, ensuring that the target tissue can be effectively and stably drained.

[0069] In another feasible embodiment, refer to Figure 2 and Figure 3 , the implant 50 passes through the handle assembly 40, the distal end of the implant 50 is connected to the drainage member 30, and the implant 50 can move relative to the handle assembly 40 under the action of an external force and drive the drainage member 30 to move along the axial direction of the outer tube member 10, so that the drainage member 30 disengages from the outer tube member 10, that is, by operating the proximal end of the implant 50, the position of the drainage member 30 relative to the outer tube member 10 can be adjusted, so that the drainage member 30 can be left in the target tissue to realize the drainage of the target tissue.

[0070] Further, the implant 50 is disposed outside the outer wall of the outer tube member 10, so that the distal end of the implant 50 can abut against the proximal end of the drainage member 30 and push the drainage member 30 to move relative to the outer tube member 10, realizing leaving the drainage member 30 in the target tissue. It can be understood that as long as the implant 50 can push the drainage member 30 to move, the shape of the implant 50 is not limited. For example, the implant 50 is linear, conical, tubular, etc. Further, the implant 50 may also be provided with shapes such as notches or grooves, so as to facilitate the implant 50 to maintain stability on the outer wall of the outer tube member 10.

[0071] Preferably, a part of the implant 50 is sleeved on the outer tube member 10, so that the distal end of the implant 50 and the proximal end of the drainage member 30 can have a larger contact area, which helps the implant 50 to stably push the drainage member 30 to move along the axial direction of the outer tube member 10, so that the drainage member 30 can smoothly and evenly disengage from the outer tube member 10, ensuring that the target tissue can be effectively and stably drained.

[0072] In some embodiments, the implant 50 is detachably connected to the drainage member 30, such that there are a locked state and an unlocked state between the drainage member 30 and the implant 50. In the locked state, the distal end of the implant 50 is fixedly connected to the proximal end of the drainage member 30; in the unlocked state, the drainage member 30 can be detached from the implant 50. Generally, the detachable connection includes but is not limited to screw connection, snap connection, buckle connection, and plug connection. Specifically in this embodiment, the drainage member 30 is snap-connected to the implant 50 by means of a protrusion and a groove being snapped together.

[0073] When the outer tube member 10 moves along its axial direction or the inner needle assembly moves relative to the outer tube member 10, the locked state is maintained between the drainage member 30 and the implant 50, so as to prevent the drainage member 30 from affecting the cutting process of the cutting portion 11 or the puncture process of the needle tip portion 21. When the drainage member 30 is detached from the needle tip portion 21 or the drainage member 30 is detached from the cutting portion 11, the unlocked state exists between the drainage member 30 and the implant 50. Subsequently, the implant 50 is withdrawn from the human body along with the endoscope, and the drainage member 30 remains in the target tissue to drain the target tissue.

[0074] In an embodiment not shown, the implant 50 may also be integrated on the handle assembly 40. By adding an insertion handle unit on the handle assembly 40, the movement of the implant 50 can be controlled through the insertion handle unit, and thus the movement of the drainage member 30 can be realized.

[0075] In a feasible embodiment, the endoscope drainage device 100 further includes a retrieval member (not shown), and the retrieval member is connected to the proximal end of the drainage member 30. When the drainage member 30 is detached from the needle tip portion 21 or the drainage member 30 is detached from the cutting portion 11, the retrieval member will be detached from the needle tip portion 21 or the cutting portion 11 along with the drainage member 30. Thus, the retrieval member and the drainage member 30 remain in the target tissue together. After the drainage of the target tissue is completed, the drainage member 30 can be moved by operating the retrieval member, which helps to retrieve the drainage member 30 subsequently.

[0076] Furthermore, the retrieval member is also connected to the distal end of the implant 50, so that the retrieval member can fix between the drainage member 30 and the implant 50. It should be noted that since the retrieval member needs to remain in the target tissue along with the drainage member 30, there should be a detached state between the retrieval member and the implant 50.

[0077] In a feasible embodiment, the endoscopic drainage device 100 further includes a locking member 60. The locking member 60 is connected to the handle assembly 40 and the insertion member 50. The locking member 60 is used to lock the insertion member 50 to prevent the insertion member 50 from moving relative to the handle assembly 40. During use, the locking member 60 is loosened, and the insertion member 50 is pushed to move relative to the handle assembly 40, and then the drainage member 30 is pushed to move relative to the outer tube member 10 or the inner needle member 20. After the drainage member 30 is pushed to a preset position, the insertion member 50 is fixed by the locking member 60. Specifically, when the outer tube member 10 or the inner needle member 20 moves, the insertion member 50 can be locked by the locking member 60 to facilitate maintaining a locked state between the insertion member 50 and the drainage member 30.

[0078] In some embodiments, the inner needle member 20 is an inner needle member that extends hollow along its axial direction, so that a compatible instrument for endoscopic surgery can be inserted into or withdrawn from the inner needle member 20. It should be noted that the technical feature "so that a compatible instrument for endoscopic surgery can be inserted into or withdrawn from the inner needle member 20" is a functional limitation on the size and structure of the hollow tube of the inner needle member 20, and it is not an essential feature for defining the protection scope of this embodiment. Specifically, when the product is sold on the market, the compatible instrument is sold as an independent accessory of the drainage device 100, or the compatible instrument is sold separately from the drainage device 100. During surgery, the compatible instrument is inserted through the inner needle member 20. Therefore, when the drainage device 100 is sold separately, there is no compatible instrument in its inner needle member 20 at this time, and this kind of product should of course also be within the protection scope of this embodiment.

[0079] In addition, the compatible instrument can be a guide wire, a support wire, a probe, etc. The main function of the guide wire is to play a guiding role, so as to facilitate guiding the accurate movement of the cutting part 11 and the accuracy of the placement of the drainage member 30. Through the guide wire, the cutting part 11 and the drainage member 30 can be moved along the guide wire to a preset position, avoiding damage to normal tissues by the needle tip 21 when the cutting part 11 and the drainage member 30 move along the inner needle member 20. The main function of the support wire is to enhance the rigidity of the inner needle member 20 and facilitate puncture. The probe can push out the substances in the needle cavity or play a supporting function.

[0080] When the endoscopic drainage device 100 in the present application is in use, the distal end of the endoscope can be first moved to the positions of the first target tissue and the second target tissue, and then the endoscopic drainage device 100 is inserted into the forceps channel of the endoscope, and the endoscopic drainage device 100 is brought close to the first target tissue and the second target tissue through the forceps channel of the endoscope.

[0081] The inner needle member 20 is driven by the inner needle handle unit 41 to move, so that the needle tip 21 extends out of the distal end of the outer tube member 10, and a preliminary drainage channel is formed for the first target tissue and the second target tissue through the sharp needle tip 21, so that the liquid or gas accumulated in the second target tissue can flow into the first target tissue.

[0082] After puncture, the inner needle member 20 should be in a preset position, and the preset position should meet the requirement that the drainage member 30 passes through the first puncture part and the second puncture part and both ends of the drainage member 30 are located in the first target tissue and the second target tissue respectively.

[0083] The outer tube member 10 and the cutting part 11 are moved along the extending direction of the inner needle member 20 through the outer tube handle unit 42. In the energized state, the cutting part 11 expands the first puncture part and the second puncture part, so that the sizes of the first puncture part and the second puncture part match the size of the drainage member 30, facilitating the subsequent placement of the drainage member 30. In other embodiments, a guide wire can be passed through the inner needle member 20. At this time, the inner needle member 20 can be retrieved, and the cutting part 11 cuts the first puncture part and the second puncture part along the guide wire, avoiding damage to normal tissues caused by the needle tip 21.

[0084] The drainage member 30 is pushed by the implant 50 to move relative to the inner needle member 20 and separate from the needle tip 21, or the drainage member 30 is pushed by the implant 50 to move relative to the outer tube member 10 and separate from the cutting part 11. The drainage member 30 will be left at the preset position, and the liquid or gas accumulated in the second target tissue can flow into the first target tissue through the drainage member 30. In other embodiments, a guide wire can be passed through the inner needle member 20 to make the guide wire in the preset position, so that the drainage member 30 can be placed along the guide wire. Finally, the outer tube member 10, the inner needle member 20, the implant 50 and the guide wire are withdrawn through the forceps channel of the endoscope, and then the endoscope is withdrawn from the human body to complete the drainage operation.

[0085] First, the first target tissue and the second target tissue are punctured through the needle tip 21, then the first puncture part and the second puncture part are expanded through the cutting part 11, and finally the drainage member 30 is moved relative to the inner needle member 20 and separated from the needle tip 21 or the drainage member 30 is moved relative to the outer tube member 10 and separated from the cutting part 11, so that the drainage member 30 passes through the first puncture part and the second puncture part and both ends of the drainage member 30 are located in the first target tissue and the second target tissue respectively, realizing the drainage of the first target tissue and the second target tissue, integrating puncture, cutting and drainage, simplifying the process of the drainage operation, saving the operation time and reducing the operation risk.

[0086] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0087] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An endoscope drainage device (100), characterized in that: The endoscope drainage device (100) comprises: An outer tube member (10); an inner needle member (20), the inner needle member (20) being receivable in the outer tube member (10), the inner needle member (20) being capable of penetrating a target tissue; and A drainage member (30), wherein the drainage member (30) is capable of moving relative to the inner needle member (20) and detaching from the inner needle member (20), or the drainage member (30) is capable of moving relative to the outer tube member (10) and detaching from the outer tube member (10), so that the drainage member (30) can enter the target tissue and form a channel in the target tissue.

2. The endoscopic drainage device according to claim 1, characterized in that: The drainage member (30) is made of a superelastic material, and the drainage member (30) is capable of restoring its original shape after being separated from the outer tube member (10) or the inner needle member (20).

3. The endoscopic drainage device according to claim 2, characterized in that: The original shape of the drainage member (30) is a hollow tube and both ends of the drainage member (30) are curled; or, The original shape of the flow guiding member (30) is a hollow tube, and the cross-sectional area at both ends of the flow guiding member (30) is larger than the cross-sectional area in the middle of the flow guiding member (30).

4. The endoscopic drainage device according to claim 2, characterized in that: The drainage member (30) comprises a drainage layer (31) and a support layer (32), wherein the drainage layer (31) is arranged on the periphery of the support layer (32), and the support layer (32) is made of a superelastic material, so that the drainage member (30) can restore its original shape after being separated from the outer tube member (10) or the inner needle member (20).

5. The endoscopic drainage device according to claim 4, characterized in that: The drainage member (30) further comprises a lubricating layer (33), wherein the lubricating layer (33) is arranged on the inner side of the supporting layer (32), and the lubricating layer (33) is used to reduce the resistance when the drainage member (30) moves relative to the outer tube member (10) or the inner needle member (20).

6. The endoscopic drainage device according to claim 4, characterized in that: The drainage layer (31) is provided with a drainage portion (311), the support layer (32) comprises a plurality of support pipe segments (321), and the drainage portion (311) is arranged between the support pipe segments (321).

7. The endoscopic drainage device according to claim 1, characterized in that: The endoscopic drainage device further comprises an insertion piece (50), the distal end of which is connected to the drainage member (30), and the insertion piece (50) is capable of driving the drainage member (30) to move along the axial direction of the outer tube member (10) or the inner needle member (20), so that the drainage member (30) is separated from the outer tube member (10) or the inner needle member (20).

8. The endoscopic drainage device according to claim 7, characterized in that: The insert (50) is detachably connected to the drainage member (30), and the drainage member (30) and the insert (50) have a locked state and an unlocked state. In the locked state, the distal end of the insert (50) is fixedly connected to the proximal end of the drainage member (30); in the unlocked state, the drainage member (30) can be detached from the insert (50).

9. The endoscopic drainage device according to claim 7, characterized in that: The drainage device for an endoscope further comprises a recovery component, wherein the recovery component is connected to the proximal end of the drainage member (30) and the distal end of the insertion component (50).

10. The endoscopic drainage device according to claim 7, characterized in that: The endoscopic drainage device further comprises a handle assembly (40), the proximal ends of the outer tube member (10) and the inner needle member (20) are both connected to the handle assembly (40), the handle assembly (40) is capable of driving the outer tube member (10) to move along its axial direction, the distal end of the inner needle member (20) is provided with a needle head (21) capable of piercing a target tissue, and the handle assembly (40) is capable of driving the needle head (21) to extend out from the distal end of the outer tube member (10).

11. The endoscopic drainage device according to claim 10, characterized in that: The endoscopic drainage device further comprises a locking member (60), wherein the locking member (60) is connected to the handle assembly (40) and the insertion member (50), and the locking member (60) is used to lock the insertion member (50) to prevent the insertion member (50) from moving relative to the handle assembly (40).

12. The endoscopic drainage device according to claim 11, characterized in that: The distal end of the handle assembly (40) is fixed on the endoscope.

13. The endoscopic drainage device according to claim 12, characterized in that: The handle assembly (40) comprises an inner needle handle unit (41) and an outer tube handle unit (42); the inner needle handle unit (41) is connected to the proximal end of the inner needle member (20); the inner needle handle unit (41) is used to control the inner needle member (20) to move along its axial direction; the outer tube handle unit (42) is connected to the proximal end of the outer tube member (10); the outer tube handle unit (42) is used to control the outer tube member (10) to move along its axial direction.

14. The endoscopic drainage device according to claim 1, characterized in that: The inner needle component (20) is an inner needle component (20) that is hollow and extends along its axial direction, so that compatible instruments for endoscopic surgery can be inserted into or removed from the inner needle component (20).

15. The endoscopic drainage device according to claim 1, characterized in that: A cutting portion (11) is provided at the distal end of the outer tube component (10), and the cutting portion (11) is used to cut the target tissue after being penetrated by the inner needle component (20).

16. The endoscopic drainage device according to claim 15, characterized in that: The outer tube member (10) comprises, from the outside to the inside, a surface layer (12), a conductive layer (13) and an isolation layer (14), wherein the surface layer (12) is used to protect the conductive layer (13), the conductive layer (13) is electrically connected to the cutting portion (11), and the isolation layer (14) is used to isolate the cutting portion (11) from the inner needle member (20).

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