Endoscopic device and combined medical instrument for an endoscopic device
By designing an endoscopic device that integrates a ferrule and a scalpel, the problem of alternating instruments in the surgery for multiple polyps was solved, achieving the effects of simplified operation, improved accuracy, and reduced costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MICRO-TECH (NANJING) CO LTD
- Filing Date
- 2024-12-26
- Publication Date
- 2026-06-02
AI Technical Summary
In existing technologies, surgeries for multiple polyps require the alternating use of a snare and an electrocautery knife, which increases the complexity, time, and risk of the surgery, and also increases the cost.
A combined medical device for endoscopy was designed, which combines the functions of a snare and a scalpel. Driven by a drive unit, the snare can change between contraction and expansion states, integrating the functions of an electrosurgical unit and a snare to achieve a variety of treatment operations.
It simplifies surgical procedures, reduces errors in instrument changes, improves surgical precision, shortens surgical time, and reduces costs and risks.
Smart Images
Figure CN224307366U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of endoscopic tools, and in particular to endoscopic devices and combined medical devices for endoscopic devices. Background Technology
[0002] An endoscope is a commonly used medical instrument used to examine and treat internal organs and tissues. It typically consists of a long, thin tubular structure with a light source and camera at one end and a display screen at the other. Doctors can use an endoscope to observe the inside of the body, make diagnoses, or perform minimally invasive surgery. A snare is a tool used in endoscopic surgery. Guided by the endoscope, the snare can be positioned to target tissue (such as a polyp), and then the tissue is captured and removed by tightening the metal snare. Snares are mainly used to remove smaller polyps or other lesions. An electrosurgical unit (ESU) is a medical device that uses high-frequency current for cutting and hemostasis. In endoscopic surgery, an ESU can be used to remove larger lesions because it provides more precise cutting and better hemostasis.
[0003] When a patient has multiple polyps of varying sizes, the procedure may require alternating between a snare and an electrocautery device. For example, polyps with a diameter of 20 mm or less can be removed using a snare, while polyps or lesions larger than 20 mm require an electrocautery device. This alternating use of two instruments in related techniques does increase the complexity and time of the surgery, as well as medical costs and surgical risks. Utility Model Content
[0004] Therefore, it is necessary to provide an endoscopic device that is widely applicable, saves surgical time, and reduces surgical risks, as well as a combined medical device for the endoscopic device, to address the aforementioned technical problems.
[0005] On one hand, a combined medical device for an endoscope is provided, the medical device comprising:
[0006] An outer tube has a working channel and a port. The outer tube is hollow to form the working channel, and the port is located at the distal end of the outer tube, connecting the working channel to the outside.
[0007] A cable assembly is movably disposed in the working channel. The cable assembly includes a drive member, a cutter bar, and a collar member. The collar member is connected to the distal end of the drive member, and the cutter bar is disposed at the distal end of the collar member. The collar member and / or the cutter bar can extend from the port under the drive of the drive member. The collar member is configured with a variable inner diameter structure, and can expand to increase its inner diameter after extending from the port. The cutter bar is used to perform a cutting operation on the target object.
[0008] In one embodiment, the collar component includes a first collar arm and a second collar arm, the proximal ends of the first collar arm and the second collar arm are connected to the drive member, the distal ends of the first collar arm and the second collar arm are spaced apart, and the cutter bar is embedded between the distal ends of the spaced-apart first collar arm and the distal ends of the second collar arm.
[0009] In one embodiment, the collar is a deformable memory ring structure, and the collar includes a contracted state and an expanded state;
[0010] In the contracted state, after the collar member enters at least partially into the working channel, the collar member is compressed;
[0011] In the expanded state, at least a portion of the collar extends out of the port, and at least a portion of the collar is annular under the constraint of the proximal and distal ends of the collar.
[0012] Depending on the action of the driving component and based on the change in the positional relationship between the collar component and the working channel, the collar component can change between a contracted state and an expanded state.
[0013] In one embodiment, the medical device is connected to a high-frequency generator, and the expansion state includes:
[0014] In the first operating state, the collar component is opened into a ring shape, and the high-frequency generator is not operating; and
[0015] In the second working state, the collar component opens into a ring shape, and the high-frequency generator operates.
[0016] The contraction state includes:
[0017] In the third operating state, the tool holder extends at least partially out of the port, and the high-frequency generator operates.
[0018] In one embodiment, the collar includes a limiting segment located on the periphery of the tool holder, the limiting segment being able to abut against the periphery of the port, and the limiting segment having memory, being able to change its limiting function as the inner diameter of the collar changes.
[0019] In one embodiment, the length of the limiting segment is less than the inner diameter of the outer tube but greater than the inner diameter of the port.
[0020] In one embodiment, the outer tube includes a spring tube and an insulating head, the spring tube forming the working channel, the spring tube being covered with an insulating coating, and the insulating head being located at the distal end of the spring tube, forming the port.
[0021] In one embodiment, the medical device includes a handle assembly connected to the outer tube, the handle assembly being used to operate the actuator.
[0022] In one embodiment, the handle assembly includes a base and an operating part, the base being connected to the outer tube and communicating with the working channel, the operating part being movably disposed on the base and connected to the proximal end of the drive member.
[0023] On the other hand, an endoscopic device is provided, comprising:
[0024] A catheter with an instrument channel; and
[0025] The aforementioned medical devices can enter the device channel.
[0026] The aforementioned medical device and endoscope of this application have the scalpel located at the distal end of the snare, combining the functions of an electrosurgical unit and a snare. The two do not interfere with each other during use. Depending on the degree of drive of the snare by the drive unit, it is possible to select which part to extend and perform the corresponding treatment. The structure is simplified and easy to operate, reducing the errors that may occur due to frequent instrument changes and improving surgical accuracy.
[0027] By integrating multiple functions, these medical devices allow doctors to complete more surgical steps without changing instruments, reducing interruptions during surgery and making the surgical process smoother. Reduced surgical time also lowers anesthesia and operating room costs, alleviating the financial burden on patients. Medical staff no longer need to frequently prepare and change instruments, reducing their workload and the risk of operational errors. Shorter surgical time means less time patients are exposed to surgical risks, which is extremely beneficial for patient safety and postoperative recovery. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of a medical device in an expanded state according to an embodiment of this application.
[0029] Figure 2 for Figure 1 A magnified schematic diagram of part of structure A in the middle.
[0030] Figure 3 This is a partial structural diagram of a medical device in a contracted state according to an embodiment of this application.
[0031] Figure 4 This is a partial structural schematic diagram of the collar component in one embodiment of this application.
[0032] Figure 5 This is a partial structural diagram of the collar and the tool holder in one embodiment of this application.
[0033] Explanation of icon numbers:
[0034] 1. Medical device; 100. Outer tube; 110. Bourdon tube; 120. Insulating head; 121. Port; 130. Insulating coating; 200. Cable assembly; 210. Looping part; 211. Limiting section; 212. Connecting section; 213. First looping arm; 214. Second looping arm; 220. Blade bar; 221. Passing part; 222. End; 230. Drive component; 240. Conductive base; 300. Handle assembly; 310. Base body; 320. Operating part. Detailed Implementation
[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0036] Increasingly, advancements in surgical techniques involve reducing the invasiveness of procedures. In particular, surgeons seek to perform “minimally invasive” surgeries whenever possible, meaning incisions are limited to a specific size. However, many procedures that can be performed almost entirely through very small incision sites have eliminated the need for a final step that is difficult to perform through such small incision sites. This final step is the removal of excised tissue. For example, removing a large portion of tissue (e.g., a polyp, the entire uterus, a large portion of a kidney, or a cancerous tumor) presents numerous logistical challenges.
[0037] Several factors can make the process time-consuming, difficult, chaotic, and / or pose risks to the patient. For example, if a portion of the tissue is calcified, currently available cutting equipment may take a long time to cut through that portion. In such cases, cutting the tissue during extraction can take an hour or more and require numerous hands and tools in the area. This poses an especially high risk to the patient if the tissue sample contains a cancerous tumor.
[0038] In particular, when a patient has multiple polyps of varying sizes, the procedure may require alternating use of a snare and an electrocautery device. For example, polyps with a diameter of 20 mm or less can be removed using a snare, while polyps or lesions larger than 20 mm require an electrocautery device. In related technologies, this alternating use of two instruments does increase the complexity and time of the procedure, as well as medical costs and surgical risks. This application provides an improved endoscopic device that offers wider applicability, saves surgical time, and reduces surgical risks in tool switching, along with a combined medical device for use therein.
[0039] See Figure 1-5 , Figure 1-5 A schematic diagram of a combined medical device 1 according to an embodiment of this application is shown. The combined medical device 1 provided in this embodiment is suitable for an endoscope. The endoscope also includes a catheter with an instrument channel for the entry of various surgical instruments. As described above, the medical device 1 can enter the instrument channel and extend from the distal end of the instrument channel to complete the corresponding operation.
[0040] Medical device 1 includes an outer tube 100 and a cable assembly 200. The outer tube 100 has a working channel and a port 121. The outer tube 100 is hollow to form the working channel. The port 121 is located at the distal end of the outer tube 100 and connects the working channel to the outside. The cable assembly 200 is movably disposed in the working channel. The cable assembly 200 includes a drive member 230, a cutting rod 220, and a collar member 210. The collar member 210 is connected to the distal end of the drive member 230. The cutting rod 220 is located at the distal end of the collar member 210. The collar member 210 and / or the cutting rod 220 can extend from the port 121 under the drive of the drive member 230. The collar member 210 is configured with a variable inner diameter structure, and can expand to increase its inner diameter after extending from the port 121. The cutting rod 220 is used to perform a cutting operation on the target object.
[0041] The medical device 1 and endoscope described in this application have the scalpel 220 located at the distal end of the snare 210, combining the functions of an electrosurgical unit and a snare. The two do not interfere with each other during use. Depending on the degree of drive of the drive unit 230 on the snare 210, it is possible to select which part to extend and perform the corresponding treatment. The structure is simplified and easy to operate, reducing the errors that may occur due to frequent instrument changes and improving surgical accuracy.
[0042] The aforementioned medical device 1 integrates multiple functions, allowing doctors to complete more surgical steps without changing instruments, reducing interruptions during surgery and making the surgical process smoother. Reduced surgical time also lowers anesthesia and operating room usage costs, thus alleviating the financial burden on patients. Medical staff no longer need to frequently prepare and change instruments, reducing their workload and the risk of operational errors. Shorter surgical time means less time patients are exposed to surgical risks, which is extremely beneficial for patient safety and postoperative recovery.
[0043] Understandably, in this article, all "distal" and "proximal" in different structures refer to the same direction. "Distal" is the direction that is further away from the operator when the endoscope device 1 is in use, and "proximal" is the direction that is closer to the operator when the endoscope device 1 is in use.
[0044] The outer tube 100 is formed into an elongated tubular shape from a flexible insulator and extends through the instrument channel of an endoscope. In one embodiment, the outer tube 100 includes a spring tube 110 and an insulating head 120. The spring tube 110 forms the working channel and is covered with an insulating coating 130. The insulating head 120 is located at the distal end of the spring tube 110 and forms the port 121.
[0045] Specifically, the spring tube 110 is a tubular structure formed by spirally winding fine metal filaments. The tightly connected filaments form the tube wall, and the hollow portion formed by the spiral serves as the working channel. Compared to plastic materials, the metal spring tube 110 has stronger structural performance, and the spiral spring structure also gives it flexible deformation capability. To ensure the safety of the surgical procedure, the spring tube 110 is covered with an insulating coating 130, and an insulating head 120 is provided at the end 222, making the spring tube 110 an insulator as a whole. The spring tube 110 does not directly contact the tissue radially or axially.
[0046] An insulating head 120 has a through hole in its center, which matches the inner diameter of the working channel, so that the circumference of one end of the insulating head 120 abuts against one end of the spring tube 110. An insulating coating 130 extends from the outside of the spring tube 110 to the outer surface of the insulating head 120, preventing leakage gaps and also serving as a bonding agent. The through hole in the center of the insulating head 120 forms a port 121.
[0047] In one embodiment, the medical device 1 includes a handle assembly 300 connected to the outer tube 100 and used to operate the drive member 230. The handle assembly 300 includes a base 310 and an operating part 320. The base 310 is connected to the outer tube 100 and communicates with the working channel. The operating part 320 is movably disposed on the base 310 and connected to the proximal end of the drive member 230.
[0048] like Figure 1 As shown, the seat 310 is formed approximately vertically along the axial direction of the outer tube 100. The proximal end of the outer tube 100 is connected to the distal end of the seat 310. An annular portion for the surgeon's thumb or similar object to be inserted is integrally formed on the seat 310. An operating portion 320 is provided near the distal end of the seat 310, and the operating portion 320 is formed in a generally rectangular shape with a generally constant thickness along the axial direction of the outer tube 100. The operating portion 320 is slidably disposed on the seat 310. Another annular portion for placing the index and middle fingers, etc., is integrally formed on the operating portion 320. When the operating portion 320 slides along the seat 310, the drive member 230 moves axially inside the outer tube 100 (in the working channel) to drive the collar member 210 and the blade holder 220 to move axially.
[0049] In one embodiment, the collar member 210 is a deformable memory ring structure, and the collar member 210 includes a contracted state and an expanded state. For example... Figure 3-5 As shown, in the contracted state, after the collar member 210 has at least partially entered the working channel, the collar member 210 is compressed. Figure 1-2 As shown, in the expanded state, at least a portion of the collar member 210 extends from the port 121, and the collar member 210 is annular due to the constraints of its proximal and distal ends. The collar member 210 can change between a contracted state and an expanded state depending on the action of the drive member 230 and the change in its positional relationship with the working channel.
[0050] Specifically, the loop 210 is made of metal wire, such as stainless steel wire, and therefore possesses elasticity and memory, allowing it to be repeatedly deformed. Thus, the surgeon can perform: operations such as extending the working channel using the loop 210 from a contracted state to an expanded state, operations such as re-grabbing the excision target using the loop 210, operations such as sequentially capturing multiple different excision targets using the loop 210, and operations such as retracting the working channel using the loop 210 from an expanded state to a contracted state. In this embodiment, the loop 210, as an example, has a wire diameter of approximately 0.3-0.6 mm. Therefore, the surgeon can perform both procedures: excising tissue by applying a high-frequency current to the loop 210 and excising tissue by tightly binding the tissue with the loop 210 without applying a high-frequency current.
[0051] Furthermore, the ring component 210 is processed through shaping and engraving processes, enabling it to have memory properties that can change between a contracted state and an expanded state, and to directly form a ring shape as required when the ring component 210 enters the expanded state.
[0052] In one embodiment, the collar member 210 includes a first collar arm 213 and a second collar arm 214, the proximal ends of the first collar arm 213 and the second collar arm 214 are connected to the drive member 230, the distal ends of the first collar arm 213 and the second collar arm 214 are spaced apart, and the cutter bar 220 is embedded between the distal ends of the first collar arm 213 and the distal ends of the second collar arm 214.
[0053] The first collar arm 213 and the second collar arm 214 form a deformable, memory-structured ring, wherein the collar member 210 includes a contracted state and an expanded state. In the contracted state, after at least part of the collar member 210 enters the working channel, at least parts of the first collar arm 213 and the second collar arm 214 approach each other under the constraint of the working channel. In the contracted state, the first collar arm 213 and the second collar arm 214 can abut against the inner wall of the working channel. In the expanded state, at least part of the collar member 210 extends out of the port 121, and the first collar arm 213 and the second collar arm 214 automatically extend and move away from each other. Under the constraint of the proximal and distal ends of the collar member 210, at least part of the collar member 210 is annular.
[0054] In one embodiment, the collar member 210 includes a limiting segment 211 located around the blade shank 220. The limiting segment 211 can abut against the periphery of the port 121, and the limiting segment 211 has memory and can change its limiting function as the inner diameter of the collar member 210 changes.
[0055] In one embodiment, particularly in the contracted state, the length L1 of the limiting segment 211 is less than the inner diameter L2 of the outer tube 100 and greater than the inner diameter of the port 121.
[0056] Specifically, the limiting segment 211 is located at the distal end of the collar member 210. The distal end of the collar member 210 also includes a connecting portion at the very end. The connecting portion is basically arranged along the axial direction of the outer tube 100. The connecting portion is used to clamp and connect the tool bar 220. The connecting portion is in contact with the outer surface of the tool bar 220, so the extension direction of the tool bar 220 is parallel to the axial direction of the outer tube 100. The limiting segment 211 is located on the collar member 210 after the connecting portion. The extension direction of the limiting segment 211 is different from that of the connecting portion (i.e., it is set at an angle). The limiting segment 211 is a stepped structure formed by bending the collar member 210 from the connecting portion. For example, the limiting segment 211 is set at a 90° angle to the connecting portion.
[0057] When the driving component 230 drives the collar component 210 to extend within the outer tube 100, the limiting segment 211 abuts against the outer periphery of the port 121. That is, when the tool holder 220 and connecting segment 212 pass through the port 121, the limiting segment 211 abuts against the inside of the port 121 due to its stepped bending structure. Since the collar component 210 is made of a memory material, the limiting segment 211 also has memory properties. As the driving component 230 continues to apply force, the included angle of the limiting segment 211 is flattened under the action of external force, and the collar component 210 continues to extend beyond the port 121. When it reaches the expanded state, the collar component 210 becomes annular, and the stepped structure of the limiting segment 211 returns to its original shape. Therefore, during operation, the operator can sense feedback from the remote end through the contact between the limiting segment 211 and the port 121, thus understanding the current working status of the collar component 210. When the driving component 230 drives the collar component 210 to retract the outer tube 100, due to the memory of the limiting segment 211, the limiting segment 211 undergoes the above-mentioned flattening and recovery process again.
[0058] Furthermore, the dimensions of the connecting section 212 (or the tool holder 220) are matched with the bending position of the limiting section 211, so that when the limiting section 211 abuts against the port 121, the tool holder 220 extends out a preset length L3, and the preset length L3 should meet the operating requirements of the tool holder 220.
[0059] The cutter bar 220 has a T-shaped structure, including a through-hole portion 221 and an end portion 222. The outer diameter of the through-hole portion 221 is smaller than the inner diameter of the port 121, so that it can be received into the outer tube 100 through the port 121. The outer diameter of the end portion 222 is larger than the outer diameters of the through-hole portion 221 and the port 121 to form a T-shaped structure. When the collar 210 is retracted, the end portion 222 finally stops outside the port 121. Thus, during operation, the operator can feel a feedback from the distal end through the contact between the end portion 222 and the port 121, and know that the collar 210 has been retracted and the working status of the cutter bar 220 at this time.
[0060] In one embodiment, the proximal end of the collar member 210 is connected to the drive member 230 via a conductive base 240, the drive member 230 being made of a conductive material. Specifically, the drive member 230 is sleeved on the outside of the proximal end of the collar member 210 and the distal end of the drive member 230 to achieve connection and conduction between the drive member 230 and the collar member 210; that is, a portion of the conductive base 240 is connected to the proximal ends of the first collar arm 213 and the second collar arm 214, and another portion is connected to the drive member 230.
[0061] In one embodiment, the medical device 1 is connected to a high-frequency generator (not shown), which can supply high-frequency current to the collar 210 and the blade 220 via a drive 230.
[0062] The expansion state includes: a first working state, in which the collar 210 is opened into a ring shape and the high-frequency generator is not working; and a second working state, in which the collar 210 is opened into a ring shape and the high-frequency generator is working. The contraction state includes: a third working state, in which the tool holder 220 at least partially extends out of the port 121 and the high-frequency generator is working.
[0063] The following examples illustrate the usage scenarios of the working states. When the polyp tissue size is less than 10mm, the first working state is activated. The operating unit 320 is pushed, and the driving member 230 drives the collar member 210 to move axially. The collar member 210 extends from port 121 and is in an expanded state, at which point cold ablation is performed on the target tissue. When the polyp tissue size is greater than or equal to 10mm and less than 20mm, the second working state is activated. The operating unit 320 is pushed, and the driving member 230 drives the collar member 210 to move axially. The collar member 210 extends from port 121 and is in an expanded state, and the high-frequency transmitter is activated, at which point thermal ablation is performed on the target tissue. When the polyp tissue size is greater than or equal to 20mm, the operating unit 320 is pushed, and the driving member 230 drives the collar member 210 to move axially. Feedback is received when the limiting section 211 contacts the periphery of port 121. At this point, the cutter bar 220 extends from port 121 and peels off the target tissue. Alternatively, by pushing the operating part 320, the driving member 230 drives the collar member 210 to move axially, and the collar member 210 switches from an expanded state to a contracted state. When the collar member 210 and the tool holder 220 are fully retracted, feedback is felt when the end 222 contacts the periphery of the port 121.
[0064] It is understood that when multiple polyps are continuously operating, the switching between the first, second, and third operating states can be achieved by controlling the opening and closing of the high-frequency transmitter or controlling the drive unit 230. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0065] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0067] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0068] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening 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 intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A combined medical device for an endoscope, characterized in that, The medical device includes: An outer tube has a working channel and a port. The outer tube is hollow to form the working channel, and the port is located at the distal end of the outer tube, connecting the working channel to the outside. A cable assembly is movably disposed in the working channel. The cable assembly includes a drive member, a cutter bar, and a collar member. The collar member is connected to the distal end of the drive member, and the cutter bar is disposed at the distal end of the collar member. The collar member and / or the cutter bar can extend from the port under the drive of the drive member. The collar member is configured with a variable inner diameter structure, and can expand to increase its inner diameter after extending from the port. The cutter bar is used to perform a cutting operation on the target object.
2. The combined medical device for an endoscope according to claim 1, characterized in that, The collar assembly includes a first collar arm and a second collar arm. The proximal ends of the first collar arm and the second collar arm are connected to the drive member. The distal ends of the first collar arm and the second collar arm are spaced apart. The cutter bar is embedded between the distal ends of the first collar arm and the second collar arm.
3. The combined medical device for an endoscope according to claim 1 or 2, characterized in that, The collar component is a deformable memory ring structure, and the collar component includes a contracted state and an expanded state; In the contracted state, after the collar member enters at least partially into the working channel, the collar member is compressed; In the expanded state, at least a portion of the collar extends out of the port, and at least a portion of the collar is annular under the constraint of the proximal and distal ends of the collar. Depending on the action of the driving component and based on the change in the positional relationship between the collar component and the working channel, the collar component can change between a contracted state and an expanded state.
4. The combined medical device for an endoscope according to claim 3, characterized in that, The medical device is connected to a high-frequency generator, and the expansion state includes: In the first operating state, the collar component is opened into a ring shape, and the high-frequency generator is not operating; and In the second working state, the collar component opens into a ring shape, and the high-frequency generator operates. The contraction state includes: In the third operating state, the tool holder extends at least partially out of the port, and the high-frequency generator operates.
5. The combined medical device for an endoscope according to claim 1, characterized in that, The collar component includes a limiting section located on the periphery of the tool holder. The limiting section can abut against the periphery of the port and has memory, so that the limiting function can change with the change of the inner diameter of the collar component.
6. The combined medical device for an endoscope according to claim 5, characterized in that, The length of the limiting segment is less than the inner diameter of the outer tube but greater than the inner diameter of the port.
7. The combined medical device for an endoscope according to claim 1, characterized in that, The outer tube includes a spring tube and an insulating head. The spring tube forms the working channel, and the spring tube is covered with an insulating coating. The insulating head is located at the far end of the spring tube and forms the port.
8. The combined medical device for an endoscope according to claim 1, characterized in that, The medical device includes a handle assembly connected to the outer tube, and the handle assembly is used to operate the drive unit.
9. The combined medical device for an endoscope according to claim 8, characterized in that, The handle assembly includes a base and an operating part. The base is connected to the outer tube and communicates with the working channel. The operating part is movably disposed on the base and is connected to the proximal end of the drive member.
10. An endoscopic device, characterized in that, include: A catheter, which has an instrument channel; as well as The medical device as described in any one of claims 1-9 is capable of entering the device channel.