Drainage apparatus for endoscope and drainage method

Abstract

The embodiments of the present application relate to a drainage apparatus for an endoscope and a drainage method. The drainage apparatus for the endoscope comprises: a cutting assembly and a drainage member. The cutting assembly is configured to cut a target tissue. The drainage member is sleeved on the cutting assembly, and the drainage member can move relative to the cutting assembly and disengage from the cutting assembly, such that the drainage member can enter the target tissue and form a channel in the target tissue. The target tissue is cut by means of the cutting assembly, and then the drainage member moves relative to the cutting assembly and disengages from the cutting assembly, such that the drainage member enters the target tissue and forms the channel in the target tissue, enabling direct drainage of the punctured target tissue by means of the channel, and thus simplifying the surgical process, saving the surgical time, and reducing the operation risk of surgery.

Description

Drainage device for endoscope and drainage method

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410994331.5 filed on July 23, 2024, and entitled "Drainage device for endoscope and drainage method"; the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of medical devices, and in particular, to a drainage device for endoscope and a drainage method. BACKGROUND

[0004] An endoscope is an optical instrument commonly used in minimally invasive surgery, including hard endoscopes and soft endoscopes. In soft endoscope devices, a pipeline is provided for instruments such as surgical forceps to pass through, which is referred to as a forceps channel of the endoscope. A cutting device for endoscope, such as a cyst cutting knife, can enter the corresponding cyst position from the forceps channel of the endoscope to perform a puncture and drainage surgery.

[0005] In related technologies, when performing a puncture and drainage surgery, a puncture needle is first used to puncture the target tissue, then the puncture needle is withdrawn, a guide wire is placed, and then a cutting part is used to cut and expand along the guide wire. Finally, the cutting part is withdrawn, and a drainage stent is placed along the guide wire to drain the target tissue. However, this method is complicated to operate and takes a long time, significantly increasing the risk of operation.

[0006] SUMMARY

[0007] Therefore, it is necessary to provide a drainage device for endoscope and a drainage method to simplify the drainage surgery process and reduce the risk of operation.

[0008] In one aspect, the present application provides a drainage device for endoscope, which comprises: a cutting assembly configured to cut a target tissue; and a drainage member sleeved on the cutting assembly, and the drainage member is movable relative to the cutting assembly and detachable from the cutting assembly, so that the drainage member can enter the target tissue and form a channel in the target tissue.

[0009] In use, the above-mentioned drainage device for endoscope first cuts the target tissue by the cutting assembly, and then moves the drainage member relative to the cutting assembly and detaches the drainage member from the cutting assembly, so that the drainage member enters the target tissue and forms a channel in the target tissue. Thus, the target tissue after puncture can be directly drained through the channel, which simplifies the surgery process, saves the surgery time, and reduces the risk of operation.

[0010] In an optional embodiment, the drainage member is made of a super-elastic material, so that the drainage member can restore its original shape after being detached from the cutting assembly.

[0011] In an optional embodiment, the original shape of the drainage member is a hollow tube shape and the two ends of the drainage member are curled; or, the original shape of the drainage member is a hollow tube shape and the cross-sectional area of the two ends of the drainage member is larger than that of the middle part of the drainage member.

[0012] In an optional embodiment, the drainage member comprises a drainage layer and a support layer, the drainage layer is arranged at the periphery of the support layer, and the support layer is made of a super-elastic material, so that the drainage member can restore its original shape after being detached from the cutting assembly.

[0013] In an optional embodiment, the drainage member further comprises a lubricating layer, the lubricating layer is arranged on the inner side of the support layer, and the lubricating layer is configured to reduce the resistance when the drainage member moves relative to the inner needle member.

[0014] In an optional embodiment, the drainage layer is provided with a drainage part, and the support layer comprises a plurality of support tube segments, and the drainage part is arranged between the support tube segments.

[0015] In an optional embodiment, the cutting assembly comprises an outer tube member and an inner needle member, the inner needle member can be accommodated in the outer tube member, the drainage member is sleeved on the inner needle member, and the drainage member can move relative to the inner needle member and be detached from the inner needle member.

[0016] In an optional embodiment, the endoscope drainage device further comprises an insertion member, the distal end of the insertion member is connected to the drainage member, part of the insertion member is arranged between the outer wall of the inner needle member and the inner wall of the outer tube member, and the insertion member can drive the drainage member to move along the axial direction of the inner needle member, so that the drainage member is detached from the inner needle member.

[0017] In an optional embodiment, the cutting assembly comprises an outer tube member and an inner needle member, the inner needle member can be accommodated in the outer tube member, the drainage member is sleeved on the outer tube member, and the drainage member can move relative to the outer tube member and be detached from the outer tube member.

[0018] In an optional embodiment, the endoscope drainage device further comprises an insertion member, the distal end of the insertion member is connected to the drainage member, part of the insertion member is arranged outside the outer tube member, and the insertion member can drive the drainage member to move along the axial direction of the outer tube member, so that the drainage member is detached from the outer tube member.

[0019] In an optional embodiment, the insertion member is detachably connected to the drainage member, and the drainage member and the insertion member have a locked state and an unlocked state, in the locked state, the distal end of the insertion member is fixedly connected to the proximal end of the drainage member, and in the unlocked state, the drainage member can be detached from the insertion member.

[0020] In an alternative embodiment, the endoscope drainage device further comprises a recovery member connected to the proximal end of the drainage member and the distal end of the insertion member.

[0021] In an alternative embodiment, the endoscope drainage device further comprises a handle assembly, the proximal end of the outer tube member and the inner needle member are connected to the handle assembly, the handle assembly is capable of driving the outer tube member to move along its axial direction, the distal end of the inner needle member is provided with a needle head capable of piercing the target tissue, and the handle assembly is capable of driving the needle head to extend out of the distal end of the outer tube member.

[0022] In an alternative embodiment, the endoscope drainage device further comprises a locking member, the insertion member is capable of moving relative to the handle assembly and driving the drainage member to move relative to the cutting assembly, and the locking member is connected to the handle assembly and the insertion member, and is configured to lock the insertion member to prevent the insertion member from moving relative to the handle assembly.

[0023] In an alternative embodiment, the distal end of the handle assembly is fixed to the endoscope.

[0024] In an alternative embodiment, the handle assembly comprises 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, and is configured to control the inner needle member to move along its axial direction, and the outer tube handle unit is connected to the proximal end of the outer tube member, and is configured to control the outer tube member to move along its axial direction.

[0025] In an alternative embodiment, the inner needle member is hollow along its axial direction, so that a compatible instrument for endoscope surgery can be inserted into or withdrawn from the inner needle member.

[0026] In an alternative embodiment, the distal end of the outer tube member is provided with a cutting portion, and the cutting portion is configured to cut the target tissue after being pierced by the needle head.

[0027] In an alternative embodiment, the outer tube member comprises, from outside to inside, a surface layer, a conductive layer and an isolation layer, the surface layer is configured to protect the conductive layer, the conductive layer is electrically connected to the cutting portion, and the isolation layer is configured to isolate the cutting portion and the inner needle member.

[0028] Another aspect of the present application provides a drainage method, comprising the following steps:

[0029] An endoscope drainage device as described above is arranged close to the first target tissue and the second target tissue;

[0030] The first target tissue and the second target tissue are cut by the cutting assembly to obtain a first piercing portion and a second piercing portion;

[0031] The drainage member is pushed to move relative to the cutting assembly and away from the cutting assembly, so that the drainage member passes through the first piercing portion and the second piercing portion, and the two ends of the drainage member are located in the first target tissue and the second target tissue, respectively.

[0032] The first target tissue and the second target tissue are cut by the cutting assembly, and then the drainage member is moved relative to the cutting assembly and separated from the cutting assembly, so that the drainage member is arranged through the first puncture part and the second puncture part, and the two ends of the drainage member are located in the first target tissue and the second target tissue respectively, so that the first target tissue and the second target tissue are drained through the drainage member, thereby simplifying the operation process, saving the operation time, and reducing the operation risk. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 is a schematic view of an endoscope drainage device according to an embodiment of the present application, wherein the drainage member is sleeved on the inner needle member.

[0034] Fig. 2 is a schematic view of an endoscope drainage device according to an embodiment of the present application, wherein the drainage member is sleeved on the outer tube member.

[0035] Fig. 3 is a schematic view of a handle assembly according to an embodiment of the present application.

[0036] Fig. 4 is a schematic view of a drainage member according to an embodiment of the present application.

[0037] Fig. 5 is a sectional view of the drainage member in Fig. 4.

[0038] Fig. 6 is a flowchart of a drainage method according to an embodiment of the present application.

[0039] Reference signs: 100, endoscope drainage device; 10, outer tube member; 11, cutting part; 12, surface layer; 13, conductive layer; 14, isolation layer; 20, inner needle member; 21, needle head; 30, drainage member; 31, drainage layer; 311, drainage part; 32, support layer; 321, support tube joint; 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 piece; 60, locking piece. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings. In the following description, a large number of specific details are set forth in order 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 spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0041] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0042] In addition, if there are these terms "first", "second", these terms are only configured for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one feature. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0043] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0044] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under the second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] It is to be noted that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In addition, the term "connected" as used herein means the element that is connected can be directly connected to the other element or can be indirectly connected through one or more intervening elements. As used herein, the term "vertical", "horizontal", "upper", "lower", "left", "right", and the like are merely used for the purpose of illustration and do not indicate an exclusive orientation.

[0046] In particular, in the description of the present application, the skilled in the art should understand that, unless otherwise explicitly specified and limited, the terms "proximal end" and "distal end" are relative to the operator; the "proximal end" is the end of the endoscope operating handle that is closer to the user in one-dimensional direction when being held and operated, while the "distal end" is the end of the endoscope operating handle that is farther away from the user in one-dimensional direction when being held and operated. And the skilled in the art should understand that the "far" and "near" do not refer to the three-dimensional straight-line distance from the user.

[0047] Referring to FIG. 1, FIG. 1 shows a schematic diagram of a drainage device for endoscope in embodiments of the present application. In some embodiments, the drainage device for endoscope 100 comprises a cutting assembly and a drainage member 30. The cutting assembly is configured to cut target tissue, and the drainage member 30 is sleeved on the cutting assembly, and the drainage member 30 can move relative to the cutting assembly and be detached from the cutting assembly, so that the drainage member 30 can enter the target tissue and form a channel in the target tissue.

[0048] In use, the drainage device for endoscope 100 first cuts the target tissue through the cutting assembly, and then moves the drainage member 30 relative to the cutting assembly and detaches it from the cutting assembly, so that the drainage member 30 can directly drain the punctured target tissue, simplifying the surgical process, saving the operation time and reducing the operation risk.

[0049] It should be noted that the channel formed in the target tissue by the drainage member in the present application can also place or withdraw compatible instruments used in endoscopic surgery from or into the channel in addition to the drainage function.

[0050] In some embodiments, the drainage member 30 is made of super-elastic material, so that the drainage member 30 can automatically restore its original shape after being detached from the cutting assembly. Super-elastic 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. Super-elastic material can restore to its original shape without external force after a certain deformation.

[0051] Generally, the drainage member 30 needs to have certain flexibility and elasticity to adapt to different puncture and drainage situations and effectively drain accumulated liquid or gas during the operation. The use of super-elastic material can make the drainage member 30 have good resilience and stability, thereby improving the success rate of the operation and the comfort of the patient.

[0052] Specifically, the cutting assembly includes an outer tube member 10 and an inner needle member 20. The outer tube member 10 is configured to accommodate the inner needle member 20. The outer tube member 10 can protect the inner needle member 20 during movement of the drainage device 100.

[0053] The distal end of the inner needle member 20 is provided with a needle head 21 that can pierce the target tissue. The inner needle member 20 can be accommodated in the outer tube member 10, which helps to avoid damage to normal tissue when the needle head 21 moves. The needle head 21 can protrude from the distal end of the outer tube member 10, so that the needle head 21 can pierce the target tissue, thereby achieving the puncture process of the target tissue.

[0054] In an available embodiment, referring to FIG. 1, the drainage member 30 is sleeved on the inner needle member 20 and enters the body along with the inner needle member 20 to reach the target tissue site of the effusion or gas. Then, the super-elastic drainage member 30 can be separated from the inner needle member 20 after the target tissue is punctured and expanded, and automatically restores to the 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 damage and discomfort to the patient's tissue.

[0055] The original shape of the drainage member 30 is a hollow tube, and the cross-sectional area of both ends of the drainage member 30 is larger than that of the middle part of the drainage member 30. The increase in the cross-sectional area of both ends helps to fix the drainage member 30 during the drainage process and prevent accidental shedding or displacement of the drainage member 30.

[0056] In this embodiment, in the initial state, the drainage member 30 is sleeved on the inner needle member 20, and the cross-sectional area of each position is consistent. Then, after the drainage member 30 is separated from the needle head 21, the cross-sectional area of both ends of the drainage member 30 automatically increases, forming a shape with wide ends and a narrow middle, so as to position the drainage member 30 in the target tissue and drain the target tissue. Alternatively, the drainage member 30 is a covered film structure woven by super-elastic material wires.

[0057] In another possible embodiment, referring to FIG. 2, the drainage member 30 is sleeved on the outer tube member 10, enters the body together with the outer tube member 10, reaches the target tissue site of the effusion or the gas accumulation, and then the super-elastic drainage member 30 can be separated from the outer tube member 10 and automatically restored to the original shape after the target tissue is punctured, cut and flared, so that the drainage member 30 can be stably fixed in the target tissue, complete the drainage process of the target tissue, and help to reduce the damage and discomfort to the patient's tissue.

[0058] Referring to FIG. 4, the original shape of the drainage member 30 is a hollow tubular shape, and both ends of the drainage member 30 are curled, that is, the drainage member 30 is formed in a double J shape. The hollow tubular design can ensure the smoothness of the drainage channel in the drainage member 30, and the bending of both ends helps to fix the drainage member 30 during the drainage process, preventing accidental falling or displacement of the drainage member 30.

[0059] In the present embodiment, in the initial state, the drainage member 30 is sleeved on the outer tube member 10 and is in a tubular structure, and then after the drainage member 30 is separated from the outer tube member 10, both ends of the drainage member 30 are automatically bent and restored to a double J structure, so as to position the drainage member 30 in the target tissue and drain the target tissue.

[0060] It should be noted that as long as the drainage member 30 can realize 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, such as a straight pipe, a ball, a cone, etc.

[0061] It should be noted that in the embodiment in which the drainage member 30 is sleeved on the outer tube member 10, the cutting assembly can also only include the outer tube member 10, and the distal end of the outer tube member 10 is provided with a cutting portion 11, that is, without the inner needle member 20 to puncture the target tissue, the cutting portion 11 directly cuts the target tissue, and then the drainage member sleeved on the outer tube member 10 is moved relative to the outer tube member 10 and separated from the cutting portion 11, thereby positioning the drainage member 30 in the target tissue and draining the target tissue.

[0062] It should be noted that in the embodiment in which the drainage member 30 is sleeved on the inner needle member 20, the cutting assembly can also only include the inner needle member 20, and the distal end of the inner needle member 20 is provided with the needle head 21, i.e., the outer tube member 10 does not need to cut and expand the target tissue, and the target tissue is directly punctured by the needle head 21, and then the drainage member sleeved on the inner needle member 20 is moved relative to the inner needle member 20 and separated from the needle head 21, thereby realizing positioning of the drainage member 30 in the target tissue and drainage of the target tissue. In other embodiments, the distal end of the inner needle member 20 is provided with a cutting portion, i.e., the outer tube member 10 does not need to cut and expand the target tissue, and the target tissue is directly cut by the inner needle member 20, and then the drainage member sleeved on the inner needle member 20 is moved relative to the inner needle member 20 and separated from the cutting portion.

[0063] In some embodiments, in combination with FIGS. 4 and 5, the drainage member 30 includes a drainage layer 31 and a support layer 32, the drainage layer 31 is arranged at the periphery of the support layer 32, and the support layer 32 is made of a super-elastic material, so that the drainage member 30 can restore the original shape under the action of no external force. Specifically, the support layer 32 can be tubular, so as to provide good support performance for the drainage member 30 by the elastic support tube, and the elastic support tube is overall soft, which can reduce the stimulation to the human body and improve the comfort of the patient.

[0064] The drainage layer 31 is configured to drain, so that the accumulated liquid or gas in the target tissue can enter the drainage passage of the drainage member 30 through the drainage layer 31, and then the liquid or gas is drained through the drainage passage. Feasibly, the drainage layer 31 is provided with a drainage portion 311, and the accumulated liquid or gas enters the drainage passage through the drainage portion 311. The support layer 32 is formed by a plurality of support tube segments 321, and correspondingly, the drainage portion 311 is arranged between the support tube segments 321, so as to facilitate the liquid or gas to directly enter the drainage passage, without the need to further perforate the support layer 32, thereby reducing the preparation cost of the drainage member 30. The drainage portion 311 can be a drainage hole or a drainage groove, etc.

[0065] Optionally, the drainage layer 31 is formed by a high polymer material, and the high polymer material has good biocompatibility and plasticity, so that the drainage layer 31 has good drainage performance and can effectively guide the effusion or gas flow out of the body.

[0066] Further, the drainage member 30 further comprises a lubricating layer 33, which is arranged on the inner side of the supporting layer 32, and is configured to reduce the resistance when the drainage member 30 moves relative to the outer tube member 10 or the inner needle member 20, and reduce the resistance when the drainage member 30 is sleeved on the outer tube member 10 or the inner needle member 20, and can reduce the possibility of breeding bacteria or clogging when the drainage member 30 is placed in the human body. Optionally, the lubricating layer 33 is formed of a fluorine-containing high-lubricity polymer material.

[0067] In some embodiments, the distal end of the outer tube member 10 is further provided with a cutting portion 11 configured to cut the target tissue, and the cutting portion 11 can cut and flared the target tissue after puncture, so as to facilitate the placement of the drainage member 30, so that in use, the target tissue can be punctured by the needle portion 21 first, and then flared by the cutting portion 11, so as to facilitate the placement of the drainage member 30 in the target tissue.

[0068] Feasibly, referring to FIGS. 1 and 2, the cutting portion 11 is selected as an electrotome, which has fast cutting speed, good hemostatic effect, simple operation, can accurately cut and flared the target tissue, greatly shortens the operation time and reduces the operation risk.

[0069] Specifically in this embodiment, the outer tube member 10 comprises, from outside to inside, a surface layer 12, a conductive layer 13 and an isolation layer 14, the conductive layer 13 is electrically connected to the cutting portion 11, and the isolation layer 14 is configured to isolate the cutting portion 11 and the inner needle member 20. The surface layer 12 is configured to protect the conductive layer 13. The conductive layer 13 is electrically connected to an external power supply through a wire, so that the power supply can be output to the cutting portion 11 through the conductive layer 13 to achieve cutting and flaring of the target tissue. When the inner needle member and the conductive layer are both metal materials, the sliding friction is large in the curved state, and the setting of the isolation layer 14 can reduce the friction when the inner needle member extends out of the outer tube member; and the current of the conductive layer 13 can 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 is not limited in the present application, and any isolation layer 14 as long as it can achieve the purpose of isolating the cutting portion 11 and the inner needle member 20 should be within the protection scope of the present application.

[0070] In some embodiments, referring to FIGS. 1 and 3, the endoscopic drainage device 100 further comprises a handle assembly 40, the proximal end of the outer tube member 10 and the proximal end of the inner needle member 20 are both connected to the handle assembly 40, and the handle assembly 40 can drive the outer tube member 10 to move along the axial direction thereof, so that the outer tube member 10 can drive the cutting portion 11 to move, so as to cut and flared the target tissue after puncture by the cutting portion 11.

[0071] Further, the handle assembly 40 can drive the needle portion 21 to extend out of the distal end of the outer tube member 10 to the cutting portion 11, so that the needle portion 21 can pierce the target tissue to effectively puncture the target tissue, especially to smoothly puncture two tissues away from each other.

[0072] Feasibly, the distal end of the handle assembly 40 is fixed to the channel port of the endoscope, so that the handle assembly 40 can be relatively fixed with the endoscope to improve the stability of puncture, cutting and drainage, and facilitate the smooth completion of the operation.

[0073] 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 arranged 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 channel port of the endoscope.

[0074] The inner needle handle unit 41 is connected to the proximal end of the inner needle member 20, and is configured to control the movement of the inner needle member 20 in the axial direction thereof. The outer tube handle unit 42 is connected to the proximal end of the outer tube member 10, and is configured to control the movement of the outer tube member 10 in the axial direction thereof.

[0075] In other embodiments not shown in the drawings, the outer tube handle unit 42 is arranged 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 channel port of the endoscope; or, the outer tube handle unit 42 and the inner needle handle unit 41 are arranged side by side.

[0076] Feasibly, the inner needle handle unit 41 includes a first core rod 411, a first handle 412 sliding along the first core rod 411, and a first positioning lock 413 positioning 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 sliding along the second core rod 421, and a second positioning lock 423 positioning the relative position between the second core rod 421 and the second handle 422.

[0077] In this embodiment, the first positioning lock 413 is released, the first handle 412 moves along the first core rod 411 to adjust the extension length of the inner needle member 20, and after being adjusted to the appropriate extension length, the first positioning lock 413 is fixed. The second positioning lock 423 is released, the second handle 422 moves along the second core rod 421 to adjust the extension length of the outer tube member 10, and after being adjusted to the appropriate extension length, the second positioning lock 423 is fixed.

[0078] In some embodiments, the endoscope drainage device 100 further comprises an implant 50, as shown in FIG. 1 and FIG. 3, the implant 50 is arranged in 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 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, the position of the drainage member 30 relative to the inner needle member 20 can be adjusted by manipulating the proximal end of the implant 50, so that the drainage member 30 can be left in the target tissue to achieve the drainage of the target tissue.

[0079] Further, the implant 50 is arranged 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, so as to leave 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, such as linear, conical, tubular and the like, and further, the implant 50 can be provided with notches or grooves and the like, so that the implant 50 can be stably arranged between the inner needle member 20 and the outer tube member 10.

[0080] Preferably, 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 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 uniformly separate from the needle head 21, and the target tissue can be effectively and stably drained.

[0081] In another possible embodiment, as shown in FIG. 2 and FIG. 3, the implant 50 is arranged in 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 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 is separated from the outer tube member 10, that is, the position of the drainage member 30 relative to the outer tube member 10 can be adjusted by manipulating the proximal end of the implant 50, so that the drainage member 30 can be left in the target tissue to achieve the drainage of the target tissue.

[0082] Further, the implant 50 is configured outside the outer wall of the outer tube member 10, so that the distal end of the implant 50 can abut the proximal end of the drainage member 30 and push the drainage member 30 to move relative to the outer tube member 10, so as to realize the retention of 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, such as linear, conical, tubular and the like. Further, the implant 50 can also be provided with notches or grooves and the like in shape, so as to facilitate the implant 50 to be kept stable on the outer wall of the outer tube member 10.

[0083] Preferably, 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 uniformly separate from the outer tube member 10, and the target tissue can be effectively and stably drained.

[0084] In some embodiments, the implant 50 can be detachably connected to the drainage member 30, so that the drainage member 30 and the implant 50 have a locked state and an unlocked state. 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 separated from the implant 50. Generally, the detachable connection includes but is not limited to threaded connection, buckling connection, snap connection and plug-in connection. In particular to the present embodiment, the drainage member 30 is snap-connected to the implant 50 by the protrusion and the groove buckling.

[0085] When the outer tube member 10 moves along the axial direction thereof or the inner needle assembly moves relative to the outer tube member 10, the drainage member 30 and the implant 50 remain in the locked state, so as to avoid the drainage member 30 from affecting the cutting process of the cutting portion 11 or the puncture process of the needle head 21. When the drainage member 30 is separated from the outer tube member 10 or the needle head 21, the drainage member 30 and the implant 50 are in the unlocked state. Subsequently, the implant 50 is withdrawn from the human body with the endoscope, and the drainage member 30 is retained in the target tissue to drain the target tissue.

[0086] In an embodiment not shown, the implant 50 can also be integrated on the handle assembly 40, by increasing the implant handle unit on the handle assembly 40, so as to control the movement of the implant 50 through the implant handle unit, and then realize the movement of the drainage member 30.

[0087] In an embodiment, the endoscope drainage device 100 further comprises a retrieval member (not shown) connected to the proximal end of the drainage member 30. When the drainage member 30 is detached from the outer tube member 10 or the needle part 21, the retrieval member is detached from the outer tube member 10 or the needle part 21 along with the drainage member 30, so that the retrieval member and the drainage member 30 are left in the target tissue together. After the drainage of the target tissue is completed, the drainage member 30 can be removed by operating the retrieval member, which facilitates the subsequent retrieval of the drainage member 30.

[0088] Further, the retrieval member is also connected to the distal end of the insertion member 50, so that the retrieval member can fix the drainage member 30 and the insertion member 50. It should be noted that, since the retrieval member needs to be left in the target tissue along with the drainage member 30, the retrieval member and the insertion member 50 should have a detached state.

[0089] In an embodiment, the endoscope drainage device 100 further comprises a locking member 60 connected to the handle assembly 40 and the insertion member 50, and the locking member 60 is configured to lock the insertion member 50 to prevent the insertion member 50 from moving relative to the handle assembly 40. In use, the locking member 60 is loosened, and the insertion member 50 is pushed to move relative to the handle assembly 40, thereby pushing the drainage member 30 to move relative to the outer tube member 10 or the inner needle member 20. After the drainage member 30 is pushed to the 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, so as to keep the insertion member 50 and the drainage member 30 in a locked state.

[0090] In some embodiments, the inner needle member 20 is a hollow member extending along the 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 is not a necessary feature for limiting the protection scope of the present embodiment. Specifically, when the product is sold on the market, the compatible instrument is sold as a separate accessory of the drainage device 100, or the compatible instrument is sold separately from the drainage device 100. When performing surgery, the compatible instrument is inserted through the inner needle member 20. Thus, when the product is sold, the drainage device 100 is sold alone, and at this time, the inner needle member 20 of the drainage device 100 is not provided with the compatible instrument, and such a product should of course be within the protection scope of the present embodiment.

[0091] In addition, the compatible device can be a guide wire, a support wire, a probe, etc. The main function of the guide wire is to play a guiding role, thereby facilitating the accurate movement of the cutting part 11 and the accuracy of the placement of the drainage member 30. By means of the guide wire, the cutting part 11 and the drainage member 30 can be moved to the preset position along the guide wire, thereby avoiding damage to normal tissues caused by the needle head 21 when the cutting part 11 or the drainage member 30 moves along the inner needle member 20. The main function of the support wire is to enhance the rigidity of the inner needle member 20, thereby facilitating puncture. The probe can push out the substances in the needle cavity or play a supporting function.

[0092] Referring to FIG. 6, FIG. 6 shows a flowchart of a drainage method in the embodiment of the present application. In some embodiments, another aspect of the present application provides a drainage method, comprising the following steps:

[0093] S10, the endoscope drainage device 100 in the above embodiment is close to the first target tissue and the second target tissue.

[0094] Specifically, the distal end of the endoscope can be moved to the position of the first target tissue and the second target tissue first, and then the endoscope drainage device 100 is placed in the channel of the endoscope, and the endoscope drainage device 100 is close to the first target tissue and the second target tissue through the channel of the endoscope.

[0095] S20, the first target tissue and the second target tissue are cut by the cutting assembly to obtain the first puncture part and the second puncture part.

[0096] Specifically, step S20 includes: S21, the needle head 21 is extended out of the distal end of the outer tube member 10 and sequentially punctures the first target tissue and the second target tissue to obtain the first puncture part and the second puncture part, and the puncture process is completed.

[0097] The inner needle member 20 is driven to move by the inner needle handle unit 41, so that the needle head 21 is extended out of the distal end of the outer tube member 10, and a preliminary drainage channel is formed on the first target tissue and the second target tissue by the sharp needle head 21, so that the liquid or gas accumulated in the second target tissue can flow into the first target tissue.

[0098] It should be noted that in step S20, the inner needle member 20 should be at a preset position after puncture, and the preset position should meet the requirements that the drainage member 30 passes through the first puncture part and the second puncture part, and the two ends of the drainage member 30 are located in the first target tissue and the second target tissue, respectively.

[0099] In an embodiment, the distal end of the outer tube member 10 is further provided with a cutting portion 11 configured to cut the target tissue, and the cutting portion 11 is capable of flaring the first puncture portion and the second puncture portion after the puncture, so as to facilitate the placement of the drainage member 30. Accordingly, after step S21, step S20 further comprises step S22 of cutting and flaring the first puncture portion and the second puncture portion by the cutting portion 11.

[0100] Specifically, the outer tube handle unit 42 moves the outer tube member 10 and the cutting portion 11 along the extension direction of the inner needle member 20, and in the energized state, the cutting portion 11 cuts and flares the first puncture portion and the second puncture portion, so that the sizes of the first puncture portion and the second puncture portion match the size of the drainage member 30, so as to facilitate the subsequent placement of the drainage member 30. In other embodiments, a guide wire can be passed through the inner needle member 20, and at this time, the inner needle member 20 can be recycled, and the cutting portion 11 cuts the first puncture portion and the second puncture portion along the guide wire, avoiding damage to normal tissue by the needle head 21.

[0101] S30, moving the drainage member 30 relative to the cutting assembly and away from the cutting assembly, so that the drainage member 30 passes through the first puncture portion and the second puncture portion and the two ends of the drainage member 30 are located in the first target tissue and the second target tissue, respectively.

[0102] The drainage member 30 is moved relative to the inner needle member 20 by the placement member 50 and away from the needle head 21, or the drainage member 30 is moved relative to the outer tube member 10 by the placement member 50 and away from the outer tube member 10, and the drainage member 30 is left in 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, so that the guide wire is in the preset position, and thus the drainage member 30 can be placed along the guide wire. Finally, the outer tube member 10, the inner needle member 20, the placement member 50 and the guide wire are withdrawn through the channel of the endoscope, and then the endoscope is withdrawn from the human body, and the drainage operation is completed.

[0103] The drainage method first punctures the first target tissue and the second target tissue by the needle head 21, then flares the first puncture portion and the second puncture portion by the cutting portion 11, and finally moves the drainage member 30 relative to the inner needle member 20 and away from the needle head 21 or moves the drainage member 30 relative to the outer tube member 10 and away from the outer tube member 10, so that the drainage member 30 passes through the first puncture portion and the second puncture portion and the two ends of the drainage member 30 are located in the first target tissue and the second target tissue, respectively, and realizes the drainage of the first target tissue and the second target tissue. The drainage method integrates puncture, cutting and drainage, simplifies the process of the drainage operation, saves the operation time, and reduces the operation risk.

[0104] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as there is no conflict, any combination of the technical features should be considered within the scope of the present disclosure.

[0105] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims. Industrial applicability

[0106] In summary, the present application provides a drainage device and method for an endoscope to simplify the drainage operation process and reduce the operation risk.

Claims

1. A drainage device (100) for an endoscope, characterized in that, The endoscope drainage device (100) comprises: a cutting assembly configured to cut target tissue; and a drainage member (30) sleeved on the cutting assembly, and the drainage member (30) is movable relative to the cutting assembly and detachable from the cutting assembly, so that the drainage member (30) can enter the target tissue and form a channel in the target tissue.

2. The drainage device for endoscopy according to claim 1, characterized in that The drainage member (30) is made of a super-elastic material, and the drainage member (30) can restore its original shape after being detached from the cutting assembly.

3. The drainage device for endoscopy 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 drainage member (30) is a hollow tube, and the cross-sectional area of both ends of the drainage member (30) is greater than that of the middle part of the drainage member (30).

4. The drainage device according to claim 2 or 3, characterized in that, The drainage member (30) comprises a drainage layer (31) and a support layer (32), the drainage layer (31) is arranged on the periphery of the support layer (32), and the support layer (32) is made of a super-elastic material, so that the drainage member (30) can restore its original shape after being detached from the cutting assembly.

5. The drainage device for endoscopy according to claim 4, characterized in that The drainage member (30) further comprises a lubricating layer (33) arranged on the inner side of the support layer (32), and the lubricating layer (33) is configured to reduce the resistance when the drainage member (30) moves relative to the cutting assembly.

6. The drainage device according to claim 4 or 5, characterized in that The drainage layer (31) is provided with a drainage part (311), the support layer (32) comprises a plurality of support tube segments (321), and the drainage part (311) is arranged between the support tube segments (321).

7. The endoscopic drainage device in accordance with any one of claims 1-6, characterized in that, The cutting assembly comprises an outer tube member (10) and an inner needle member (20), the inner needle member (20) can be accommodated in the outer tube member (10), the drainage member (30) is sleeved on the inner needle member (20), and the drainage member (30) is movable relative to the inner needle member (20) and detachable from the inner needle member (20).

8. The drainage device for endoscopy according to claim 7, characterized in that The endoscope drainage device further comprises an insertion part (50), a distal end of the insertion part (50) is connected to the drainage member (30), part of the insertion part (50) is arranged between the outer wall of the inner needle member (20) and the inner wall of the outer tube member (10), and the insertion part (50) can drive the drainage member (30) to move along the axial direction of the inner needle member (20), so that the drainage member (30) is detached from the inner needle member (20).

9. The drainage device for endoscopy according to any one of claims 1-8, characterized in that, The cutting assembly comprises an outer tube member (10) and an inner needle member (20), the inner needle member (20) can be accommodated in the outer tube member (10), the drainage member (30) is sleeved on the outer tube member (10), and the drainage member (30) is movable relative to the outer tube member (10) and detachable from the outer tube member (10).

10. The drainage device for endoscopy according to claim 9, characterized in that The endoscope drainage device further comprises an insertion member (50), a distal end of the insertion member (50) is connected to the drainage member (30), part of the insertion member (50) is arranged outside the outer tube member (10), the insertion member (50) can drive the drainage member (30) to move along the axial direction of the outer tube member (10), so that the drainage member (30) is separated from the outer tube member (10).

11. The endoscopic drainage device according to any one of claims 7-10, wherein, The endoscope drainage device further comprises a handle assembly (40), a proximal end of the outer tube member (10) and the inner needle member (20) are connected to the handle assembly (40), the handle assembly (40) can drive the outer tube member (10) to move along the axial direction thereof, a distal end of the inner needle member (20) is provided with a needle head (21) capable of piercing the target tissue, and the handle assembly (40) can drive the needle head (21) to extend out of the distal end of the outer tube member (10).

12. The endoscopic drainage device according to claim 11, characterized in that The endoscope drainage device further comprises a locking member (60), the insertion member (50) can move relative to the handle assembly (40) and drive the drainage member (30) to move relative to the cutting assembly, the locking member (60) is connected to the handle assembly (40) and the insertion member (50), and the locking member (60) is arranged to lock the insertion member (50) to prevent the insertion member (50) from moving relative to the handle assembly (40).

13. The drainage device for endoscopy according to claim 11 or 12, characterized in that A distal end of the handle assembly (40) is fixed to an endoscope.

14. The endoscopic drainage device according to any one of claims 11-13, wherein, 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 a proximal end of the inner needle member (20), and the inner needle handle unit (41) is arranged to control the inner needle member (20) to move along the axial direction thereof, the outer tube handle unit (42) is connected to a proximal end of the outer tube member (10), and the outer tube handle unit (42) is arranged to control the outer tube member (10) to move along the axial direction thereof.

15. The endoscopic drainage device according to any one of claims 8-14, wherein, The insertion member (50) is detachably connected to the drainage member (30), and the drainage member (30) and the insertion member (50) have a locked state and an unlocked state, in the locked state, a distal end of the insertion member (50) is fixedly connected to a proximal end of the drainage member (30), and in the unlocked state, the drainage member (30) can be separated from the insertion member (50).

16. The endoscopic drainage device in accordance with any one of claims 8-15, characterized in that, The endoscope drainage device further comprises a recovery member, the recovery member is connected to a proximal end of the drainage member (30) and a distal end of the insertion member (50).

17. The endoscopic drainage device in accordance with any one of claims 1-16, characterized by, The inner needle member (20) is an inner needle member (20) extending hollow along the axial direction thereof, so that a compatible instrument for endoscope surgery can be inserted into or withdrawn from the inner needle member (20).

18. The endoscopic drainage device in accordance with any one of claims 1-17, characterized by, A distal end of the outer tube member (10) is provided with a cutting portion (11), and the cutting portion (11) is arranged to cut the target tissue pierced by the needle head (21).

19. The drainage device for endoscopy according to claim 17 or 18, characterized in that The outer tube member (10) comprises, from outside to inside, a surface layer (12), an electrically conductive layer (13) and an isolation layer (14), the surface layer (12) is configured to protect the electrically conductive layer (13), the electrically conductive layer (13) is electrically connected to the cutting part (11), and the isolation layer (14) is configured to isolate the cutting part (11) and the inner needle member (20).

20. A method of draining, characterized by, The method comprises the following steps: An endoscope drainage device as claimed in any one of claims 1-19 is arranged close to the first target tissue and the second target tissue; The first target tissue and the second target tissue are cut by the cutting assembly to obtain a first puncture part and a second puncture part; The drainage member is pushed to move relative to the cutting assembly and to be separated from the cutting assembly, so that the drainage member is threaded through the first puncture part and the second puncture part, and two ends of the drainage member are located in the first target tissue and the second target tissue respectively.

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