Electrosurgical knife

Abstract

The utility model provides a kind of electric knife for operation, it is related to medical instrument technical field, by being set rotatable switching connecting member between electric knife main body and injection device, it is realized in different working conditions, namely non-plugging state and plugging state, the technical scheme of injecting liquid into electric knife main body using different injection mode, when electric knife main body does not occur plugging, user can rotate connecting member relative to injection device to lift state, at this time, by manually pushing injection device, liquid can be injected into electric knife main body, it is easy to operate, response is quick, applicable to conventional injection scene, when electric knife main body appears plugging situation, connecting member can be rotated to connection state, so that the first threaded section on injection device and the second threaded section on connecting member form stable screw thread connection, at this time, user can be pressurized by rotating mode, liquid is injected into electric knife main body using screw thread drive, to realize the effective dredging of plugging site.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an electrosurgical knife for surgery. Background Technology

[0002] Endoscopic submucosal dissection (ESD) is a minimally invasive surgical technique used to treat early-stage gastrointestinal tumors, offering advantages such as minimal trauma and rapid recovery. With the development of endoscopic technology, ESD has become one of the important methods for treating early-stage gastrointestinal cancers. During ESD surgery, the surgeon uses a high-frequency electrosurgical unit to precisely dissect the submucosal layer, while simultaneously injecting fluid to form a submucosal pad to ensure surgical safety.

[0003] Existing ESD electrosurgical systems typically consist of an electrosurgical handle, a high-frequency electrogenerator, and a liquid injection device, with the electrosurgical handle integrating the cutting electrode and the liquid injection channel.

[0004] However, during surgery, surgeons frequently need to perform submucosal fluid resuscitation to maintain a clear surgical field. This often requires attaching a syringe to the electrosurgical handle for intraoperative fluid resuscitation. Furthermore, during prolonged tissue cutting, carbonized tissue adhering to the electrosurgical tip can easily clog the injection port, affecting the effectiveness of fluid perfusion. In such cases, an additional pressure pump device is needed to clear the blockage. This alternating use of multiple devices not only increases the complexity of the surgery but also affects its continuity and efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a surgical electrosurgical unit to alleviate the technical problem in the prior art that an external syringe or pressure pump is required when unblocking the blade, which is both time-consuming and inconvenient to operate.

[0006] The surgical electrosurgical unit provided by this utility model includes an electrosurgical unit body, and also includes: a shell, an injection device and a connecting component; The main body of the electrosurgical unit is at least partially disposed within the outer casing; The injection device is partially disposed in the housing, and the injection device is used to inject liquid into the electrosurgical body; The connecting member is rotatably connected to the injection device so that the connecting member can switch between a raised state and a connected state. The injection device has a first limiting section, and the connecting member has a second limiting section. When in the connected state, the first limiting section and the second limiting section are coupled together.

[0007] In an optional implementation, The first limiting segment is set as the first threaded segment, and the second limiting segment is set as the second threaded segment. When in the connected state, the first threaded segment and the second threaded segment are threadedly connected.

[0008] In an optional implementation, The injection device includes an injection syringe, a plunger, and an injection syringe cap; The injection syringe is disposed inside the outer shell, and the injection syringe cap is provided on the opening at the end of the injection syringe away from the electrosurgical body; The push rod passes through the syringe cap and extends into the syringe barrel, and the push rod is provided with the first threaded section.

[0009] In an optional implementation, The connecting component includes a rotating connection part; The rotating connection part is rotatably connected to the syringe cap, and the rotating connection part is provided with a second threaded section on the side near the push rod.

[0010] In an optional implementation, The rotating connecting part is provided with a rotating protrusion, and the syringe cap is provided with a rotating hole. The rotating hole is used for the rotating protrusion to be inserted so that the rotating connecting part can rotate around the rotating hole.

[0011] In an optional implementation, The connecting component also includes a locking part; The locking part is slidably connected to the rotating connecting part so that the locking part can move between the locked position and the unlocked position; When in the locked position, the locking part abuts against the syringe cap to restrict the rotation of the rotating connection part relative to the syringe cap.

[0012] In an optional implementation, The locking part extends toward the syringe cap and forms a locking protrusion; The syringe cap extends toward the locking part and forms an abutting protrusion; When in the locked position, the locking protrusion is located at the bottom of the abutment protrusion, and the locking protrusion abuts against the abutment protrusion.

[0013] In an optional implementation, The rotating connection part is provided with a sliding groove, and the locking part has a sliding protrusion that extends into the sliding groove, so that the locking part can slide along the sliding path formed by the sliding groove, so that the locking part can move between the locked position and the unlocked position.

[0014] In an optional implementation, The connecting member also includes a locking elastic element; The locking elastic element is disposed in the sliding groove, the locking elastic element is sleeved on the sliding protrusion, and one end of the locking elastic element is connected to the bottom of the sliding groove, and the other end of the locking elastic element is connected to the locking part. The locking elastic element is used to make the locking part have a tendency to move towards the direction of the syringe cap.

[0015] In an optional implementation, The end opening of the injection syringe near the electrosurgical body is connected to a manifold, which is connected to an injection connection tube and a replenishment connection tube. The injection connection tube is used to allow the liquid in the injection syringe to flow into the electrosurgical body, and the replenishment connection tube is used to allow external liquid to flow into the injection syringe.

[0016] In an optional implementation, The surgical electrosurgical unit also includes a flow control component; The flow direction control component is disposed inside the manifold, and the flow direction control component is configured to rotate along its own axis so that the flow direction control component can rotate and switch between a first position and a second position. When the flow direction control component is in the first position, the flow direction control component is used to connect the injection syringe with the injection communication tube. When the flow control component is in the second position, the flow control component is used to connect the injection syringe to the fluid infusion tube.

[0017] In an optional implementation, The flow control component has three interconnected holes spaced apart along the circumferential direction. When the flow control component is in the first position, the two connecting holes are respectively connected to the injection syringe and the injection connecting tube; When the flow control component is in the second position, the two connecting holes are respectively connected to the injection syringe and the fluid replenishment connecting tube.

[0018] In an optional implementation, The surgical electrosurgical unit also includes a flow control handle; The flow direction control handle protrudes from the outer shell and is fixedly connected to the flow direction control component. The flow direction control handle is used to drive the flow direction control component to rotate along its own axis.

[0019] In an optional implementation, The surgical electrosurgical unit also includes a sliding connection part; The electrosurgical unit includes a cutting head, a drive tube, and an outer tube. The cutting head is located at the distal end of the outer tube and has an injection hole. The outer tube is connected to the outer shell. The drive tube is located inside the outer tube. One end of the drive tube is connected to the cutting head, and the other end of the drive tube is connected to the injection device. The drive tube is hollow so that the liquid in the injection device can enter the injection hole along the drive tube. One end of the sliding connection protrudes from the outer shell, the outer shell is provided with a moving groove, the other end of the sliding connection passes through the moving groove and is connected to the drive tube, the sliding connection is configured to move along the moving groove so as to drive the cutter head to move telescopically relative to the outer tube through the drive tube.

[0020] In an optional implementation, The inner wall of the outer casing is provided with a snap-fit ​​groove, and the sliding connection part is provided with a snap-fit ​​protrusion. The snap-fit ​​protrusion is configured to be inserted into the snap-fit ​​groove to restrict the movement of the sliding connection part relative to the outer casing.

[0021] The surgical electrosurgical unit provided by this utility model achieves a technical solution for injecting liquid into the electrosurgical unit body using different injection methods in different working states, namely, non-blocked and blocked states, by setting a rotatable and switchable connecting component between the electrosurgical unit body and the injection device. When the electrosurgical unit body is not blocked, the user can rotate the connecting component relative to the injection device to the raised state. At this time, the liquid can be injected into the electrosurgical unit body by manually pushing the injection device. The operation is simple and the response is fast, which is suitable for conventional liquid injection scenarios. When the electrosurgical unit body is blocked, the connecting component can be rotated to the connected state, so that the first limiting segment on the injection device is coupled to the second limiting segment on the connecting component. At this time, the user can inject the liquid into the electrosurgical unit body under pressure by rotating and using the threaded transmission, thereby effectively clearing the blockage. This alleviates the technical problem of existing technologies that require external syringes or pressure pumps to clear the blade head, which is both time-consuming and inconvenient to operate. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall structure of the surgical electrosurgical unit provided in this embodiment of the utility model; Figure 2A schematic diagram of the structure of the surgical electrosurgical unit after removing the outer shell and the main body of the electrosurgical unit, as provided in this embodiment of the utility model; Figure 3 A front view of a surgical electrosurgical unit provided in an embodiment of this utility model; Figure 4 A top view of a surgical electrosurgical unit provided in an embodiment of this utility model; Figure 5 A schematic diagram of the surgical electrosurgical unit in the raised state provided in an embodiment of this utility model; Figure 6 A cross-sectional view of the overall structure of the surgical electrosurgical unit provided in this embodiment of the utility model; Figure 7 An enlarged structural schematic diagram of the connecting component in a surgical electrosurgical unit provided in this embodiment of the utility model; Figure 8 A schematic diagram of the flow control component in a surgical electrosurgical unit provided in this embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the main body of the electrosurgical unit in the surgical electrosurgical unit provided in an embodiment of the present utility model; Figure 10 An enlarged view of the connection between the electrosurgical body and the sliding connection portion in a surgical electrosurgical unit provided in an embodiment of this utility model; Figure 11 This is a schematic diagram of the outer shell of the surgical electrosurgical unit provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the sliding connection part in a surgical electrosurgical unit provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the injection cylinder cap in a surgical electrosurgical unit provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of the connecting component in a surgical electrosurgical unit provided in an embodiment of the present invention; Figure 15 This is a schematic diagram of the locking part in a surgical electrosurgical unit provided in an embodiment of the present invention; Figure 16 This is a schematic diagram of another embodiment of the rotating connecting part in the surgical electrosurgical unit provided in this utility model.

[0024] Icons: 10-Electrosurgical unit body; 11-Scalpel head; 12-Drive tube; 13-Outer tube; 100-Outer shell; 110-Moving groove; 120-Snap-fit ​​groove; 130-Observation window; 140-Conductive plug; 200-Injection device; 210-Injection syringe; 211-Manifold; 212-Injection connection tube; 213-Replenishment connection tube; 214-Scale line; 220-Push rod; 221-First threaded section; 230-Injection syringe cap; 231-First syringe body; 232-Second syringe body Body; 233-Rotating hole; 234-Abutting protrusion; 300-Connecting member; 310-Rotating connection part; 311-Second threaded section; 312-Rotating protrusion; 313-Sliding groove; 320-Locking part; 321-Locking protrusion; 322-Sliding protrusion; 330-Locking elastic element; 340-Protrusion; 410-Flow direction control member; 411-Connecting hole; 420-Flow direction control handle; 500-Sliding connection part; 510-Snap-fit ​​protrusion; 520-Connecting connector. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0029] like Figure 1-7 As shown, the surgical electrosurgical unit provided in this embodiment includes an electrosurgical body 10, a housing 100, an injection device 200, and a connecting member 300; the electrosurgical body 10 is at least partially disposed within the housing 100, such as... Figure 9 As shown, the main body 10 of the electrosurgical unit specifically includes a cutting head 11, a drive tube 12, and an outer tube 13. The cutting head 11 is located at the distal end of the outer tube 13 and has an injection hole. The middle part of the distal end of the outer shell 100 has an opening. The outer tube 13 is partially inserted into the outer shell 100 and connected to the outer shell 100 as a whole. The outer tube 13 is made of insulating material. The drive tube 12 is located inside the outer tube 13. One end of the drive tube 12 is connected to the cutting head 11, and the other end of the drive tube 12 is connected to the injection device 200. The drive tube 12 is configured as a hollow structure, and the hollow structure forms a flow channel so that the liquid in the injection device 200 can enter the injection hole along the drive tube 12.

[0030] In addition, a conductive plug 140 is fixedly installed on the outer casing 100. The conductive plug 140 is used to connect an external high-frequency generator. The conductive plug 140 contacts the drive tube 12 to form a current path. During cutting, the high-frequency generator is connected to the conductive plug 140, and the negative electrode plate is attached to the tissue to realize the cutting function.

[0031] The injection device 200 is partially disposed in the housing 100 and is used to inject liquid into the electrosurgical body 10. The connecting member 300 is rotatably connected to the injection device 200, so that the connecting member 300 can rotate relative to the injection device 200, thereby switching the connecting member 300 between a raised state and a connected state. The injection device 200 has a first limiting section, and the connecting member 300 has a second limiting section. When in the connected state, the first limiting section and the second limiting section are coupled together. The first limiting section is specifically configured as a first threaded section 221, and the second limiting section is configured as a second threaded section 311. When in the connected state, the first threaded section 221 and the second threaded section 311 are threadedly connected, thereby injecting liquid by rotating the injection device 200.

[0032] Alternatively, the first limiting section can also be set as a spiral groove, such as... Figure 16 As shown, the connecting member 300 is provided with a protrusion 340, that is, the second limiting section is the protrusion 340. When in the connected state, the protrusion 340 is located in the spiral groove, so that liquid is injected by rotating the injection device 200.

[0033] The surgical electrosurgical unit provided in this embodiment achieves a technical solution by setting a rotatable and switchable connecting member 300 between the electrosurgical unit body 10 and the injection device 200, thereby realizing different liquid injection methods to inject liquid into the electrosurgical unit body 10 in different working states, namely, non-blocking state and blocked state. Details are as follows: 1. Technical effects in non-blocking mode: Easy to operate: When the electrosurgical body 10 is not blocked, the user can rotate the connecting member 300 relative to the injection device 200 to the raised position. At this time, the threaded connection between the connecting member 300 and the injection device 200 is released, so that the liquid can be injected into the electrosurgical body 10 by manually pushing the injection device 200.

[0034] Rapid response: Since no additional mechanical structure or external equipment is required, the push-in method can quickly respond to the user's needs, improving work efficiency.

[0035] Suitable for routine injection scenarios: The push injection method is suitable for most routine surgical procedures, in which the electrosurgical body 10 is usually in an unobstructed state.

[0036] 2. Technical effects under congestion conditions: Effective unblocking of blockages: When the electrosurgical body 10 is blocked, the connecting member 300 can be rotated to the connected state, so that the first threaded section 221 on the injection device 200 and the second threaded section 311 on the connecting member 300 form a stable threaded connection. The user can then inject liquid into the electrosurgical body 10 by rotating the device and using the pressure generated by the threaded transmission, thereby effectively unblocking the blockage.

[0037] Improved unblocking efficiency: Compared with the existing technology that requires an external syringe or pressure pump to unblock the blade 11, this utility model can achieve the same unblocking effect through a simple rotation operation, which greatly simplifies the operation steps, reduces time waste, and also reduces the risk of infection that may be caused by frequent equipment changes.

[0038] Enhanced user experience: It avoids the increased costs that may result from using additional equipment, providing users with a more convenient and efficient solution.

[0039] Based on the above, the shape and structure of the injection device 200 are specifically as follows: The injection device 200 includes an injection syringe 210, a push rod 220, and an injection syringe cap 230. The injection syringe 210 is disposed inside the housing 100, and the injection syringe cap 230 covers the opening of the injection syringe 210 away from the electrosurgical body 10. The push rod 220 extends into the injection syringe 210 through the injection syringe cap 230. The push rod 220 is movable relative to the injection syringe 210 to push the liquid in the injection syringe 210 into the electrosurgical body 10. The outer surface of the push rod 220 is provided with a first threaded section 221.

[0040] In addition, a scale line 214 is provided on the syringe 210, and an observation window 130 is provided on the outer shell 100 at the position corresponding to the scale line 214, so that the user can know the liquid volume in the syringe.

[0041] like Figure 13 As shown, the syringe cap 230 is specifically a cylindrical structure with a through hole in the middle for the push rod 220 to pass through. The cylindrical structure includes two cylindrical sections with different diameters: a first cylindrical section 231 with a larger diameter and a second cylindrical section 232 with a smaller diameter. The first cylindrical section 231 covers the proximal opening of the syringe 210, and the second cylindrical section 232 is located on the side of the first cylindrical section 231 near the proximal end. The connecting member 300 is rotatably mounted on the second cylindrical section 232. Alternatively, the first cylindrical section 231 and the second cylindrical section 232 can also be set as cylindrical structures with the same diameter, but this would cause the size of the connecting member 300 rotatably connected to the second cylindrical section 232 to increase, affecting the overall operation. Therefore, preferably, the diameter of the second cylindrical section 232 is smaller than the diameter of the first cylindrical section 231.

[0042] The syringe cap 230 can be a one-piece molded structure or a split structure. The split caps are connected as a whole by screws. Preferably, the syringe cap 230 adopts a split structure to facilitate the disassembly and assembly of the syringe cap 230.

[0043] Regarding the shape and structure of the connecting member 300, specifically: like Figure 14 As shown, the connecting member 300 includes a rotating connecting part 310; the rotating connecting part 310 is rotatably connected to the second cylinder 232 in the syringe cap 230. Specifically, the rotating connecting part 310 is provided with a rotating protrusion 312, and the second cylinder 232 is provided with a rotating hole 233. The rotating hole 233 is used for the rotating protrusion 312 to be inserted so that the rotating connecting part 310 can rotate around the rotating hole 233.

[0044] To ensure rotational stability, two rotating holes 233 are symmetrically arranged along the axis of the syringe cap 230, and two rotating protrusions 312 are correspondingly arranged on the rotating connection part 310. The two rotating protrusions 312 correspond one-to-one with the two rotating holes 233, thereby achieving rotational stability of the rotating connection part 310.

[0045] The rotating connection part 310 is provided with a second threaded section 311 on the side near the push rod 220. The second threaded section 311 is located at the bottom of the rotating connection part 310, so that the connecting member 300 is located above the push rod 220, making it convenient for the user to connect the first threaded section 221 and the second threaded section 311 by pressing.

[0046] like Figure 15 As shown, the connecting member 300 also includes a locking part 320; the locking part 320 is located on the side of the threaded connection part near the injection syringe 210; the locking part 320 is slidably connected to the rotating connection part 310 so that the locking part 320 can move between the locked position and the unlocked position; when in the locked position, the locking part 320 abuts against the injection syringe 210 to restrict the rotation of the rotating connection part 310 relative to the injection syringe 210, ensuring that the first threaded section 221 and the second threaded section 311 are in a stable threaded connection state.

[0047] The locking portion 320 extends toward the syringe cap 230 and forms a locking protrusion 321. The syringe cap 230 extends toward the locking portion 320 and forms an abutment protrusion 234. When in the locked position, the locking protrusion 321 is located at the bottom of the abutment protrusion 234 and abuts against the abutment protrusion 234, so that the rotating connection portion 310 cannot rotate relative to the syringe 210, ensuring that the first threaded section 221 and the second threaded section 311 are in a stable threaded connection state.

[0048] The rotating connection part 310 is provided with a sliding groove 313, and the locking part 320 has a sliding protrusion 322, which extends into the sliding groove 313 so that the locking part 320 can slide along the sliding path formed by the sliding groove 313, so that the locking part 320 can move between the locked position and the unlocked position. The sliding groove 313 enables a smooth switch from the free rotation state to the locked state.

[0049] In an optional embodiment, the connecting member 300 further includes a locking elastic element 330; the locking elastic element 330 is disposed in the sliding groove 313, and one end of the locking elastic element 330 is connected to the bottom of the sliding groove 313, and the other end of the locking elastic element 330 is connected to the locking part 320. The locking elastic element 330 is used to make the locking part 320 have a tendency to move towards the direction of the syringe cap 230. The locking elastic element 330 is specifically configured as a compression spring. The locking elastic element 330 is used to make the locking part 320 have a tendency to move towards the direction of the syringe 210.

[0050] In addition, in order to ensure that the elastic force direction of the locking elastic member 330 is stable, the locking elastic member 330 is sleeved on the sliding protrusion 322, thereby preventing the locking elastic member 330 from bending in the sliding groove 313.

[0051] In summary, by rotating the connecting part 310 and the locking part 320, the user can easily switch between different working states without the need for additional tools or complicated operating procedures.

[0052] Furthermore, the liquid inlet and outlet of the injection syringe 210 near the end of the electrosurgical body 10 are connected to a manifold 211. The manifold 211 is connected to an injection connection tube 212 and a replenishment connection tube 213. The injection connection tube 212 is used to allow the liquid in the injection syringe 210 to flow into the electrosurgical body 10 to achieve injection, and the replenishment connection tube 213 is used to allow external liquid to flow into the injection syringe 210 to achieve replenishment.

[0053] To facilitate connection of the replenishment connecting pipe 213 to external replenishment equipment, the end of the replenishment connecting pipe 213 away from the manifold 211 protrudes from the outer casing 100.

[0054] In alternative implementations, such as Figure 8 As shown, the surgical electrosurgical unit also includes a flow control component 410. The flow control component 410 is disposed within the manifold 211 and is configured to rotate along its own axis, allowing it to switch between a first position and a second position. When the flow control component 410 is in the first position, it connects the injection syringe 210 to the injection connection tube 212, allowing the liquid flowing from the injection syringe 210 to flow into the blade head 11 through the flow control component 410 and the injection connection tube 212. When the flow control component 410 is in the second position, it connects the injection syringe 210 to the replenishment connection tube 213, enabling replenishment of the injection syringe 210. This switching process is simple to operate and responds quickly, avoiding the risks of leakage, cross-contamination, or misoperation that may occur in traditional multi-valve switching methods.

[0055] The flow control component 410 has three interconnecting holes 411 spaced apart along the circumferential direction. When the flow control component 410 is in the first position, two of the interconnecting holes 411 are connected to the injection syringe 210 and the injection tube 212, respectively. When the flow control component 410 is in the second position, two of the interconnecting holes 411 are connected to the injection syringe 210 and the replenishment tube 213, respectively. Specifically, the three interconnecting holes 411 on the flow control component 410 are labeled as hole A, hole B, and hole C, respectively.

[0056] When the flow control component 410 is in the first position, two of the connecting holes 411 on the flow control component 410, such as hole A and hole B, are connected to the injection syringe 210 and the liquid injection connecting tube 212, respectively. At this time, the liquid in the injection syringe 210 can flow into the cutter head 11 through hole A and hole B and the liquid injection connecting tube 212 to realize the liquid injection function.

[0057] When the flow control component 410 is in the second position, two of the connecting holes 411 on the flow control component 410, such as holes B and C, are connected to the injection syringe 210 and the replenishment tube 213, respectively. At this time, external liquid can flow into the injection syringe 210 through the replenishment tube 213 and holes B and C to realize the replenishment function.

[0058] The flow direction control component 410 is a cylindrical structure with three holes A, B and C evenly spaced along the circumference inside. For example, the angle between hole A and hole B is 90°, the angle between hole B and hole C is 90°, and the angle between hole C and hole A is 180°. By rotating 90°, the flow direction control component 410 can be switched between a first position and a second position.

[0059] The surgical electrosurgical unit also includes a flow direction control handle 420; the flow direction control handle 420 is configured as a handle or knob that is easy to operate manually. The flow direction control handle 420 protrudes from the housing 100 and is fixedly connected to the flow direction control component 410 through the housing 100. The flow direction control handle 420 is used to drive the flow direction control component 410 to rotate along its own axis.

[0060] To facilitate the user's control of the rotation of the flow direction control component 410 from the top of the housing 100, the manifold 211 is arranged vertically, thereby placing the flow direction control handle 420 on the top of the housing 100. The user can rotate the flow direction control component 410 between the first position and the second position by using the protruding flow direction control handle 420 on the top of the housing 100.

[0061] In alternative implementations, such as Figure 10 , Figure 12As shown, the surgical electrosurgical unit also includes a sliding connection part 500; one end of the sliding connection part 500 protrudes from the outer shell 100, and the outer shell 100 is provided with a moving groove 110, which is arranged along the axial direction of the electrosurgical unit body 10. The other end of the sliding connection part 500 passes through the moving groove 110 and is connected to the drive tube 12. Through the cooperation between the sliding connection part 500 and the moving groove 110 on the outer shell 100, the user can push the sliding connection part 500 to drive the drive tube 12 and the blade 11 to slide axially, thereby realizing the adjustment of the extension length of the blade 11 relative to the outer shell 100. This structure allows the electrosurgical unit to flexibly adjust the extension length of the blade 11 according to the size of the operating space and the surgical needs in different surgical scenarios, improving the adaptability and operational flexibility of the electrosurgical unit.

[0062] The sliding connection 500 extends into the end of the housing 100 and is provided with a connecting connector 520. The connecting connector 520 is connected to the end of the injection connecting tube 212 away from the injection syringe 210 so that the injection connecting tube 212 is connected to the drive tube 12. It should be noted that the injection connecting tube 212 is a flexible hose structure, so that the injection connecting tube 212 is always connected to the drive tube 12 during the movement of the drive tube 12.

[0063] like Figure 11 As shown, the inner wall of the outer casing 100 is provided with a snap-fit ​​groove 120. Multiple snap-fit ​​grooves 120 can be provided along the sliding path of the moving groove 110. A snap-fit ​​protrusion 510 is provided in the sliding connection part 500. The snap-fit ​​protrusion 510 can be snapped into the snap-fit ​​groove 120, thereby locking the sliding connection part 500, restricting the movement of the sliding connection part 500, and thus controlling the length of the blade.

[0064] Optionally, to improve the user's feel and operational stability when operating the sliding connector 500, a concave structure is provided on the end face of the sliding connector 500 extending out of the outer shell 100, and anti-slip texture is provided on the concave surface. This design not only increases the friction between the operator's fingers and the sliding connector 500, preventing slippage during sliding, but also effectively prevents misoperation, thereby improving operational stability and safety during surgery.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A surgical electrotome comprising an electrotome body (10), characterized in that, Also includes: The outer casing (100), the injection device (200), and the connecting member (300); The electrosurgical body (10) is at least partially disposed within the outer casing (100); The injection device (200) is partially disposed in the housing (100), and the injection device (200) is used to inject liquid into the electrosurgical body (10); The connecting member (300) is rotatably connected to the injection device (200) so that the connecting member (300) can switch between a raised state and a connected state; The injection device (200) has a first limiting section, and the connecting member (300) has a second limiting section. When in the connected state, the first limiting section and the second limiting section are coupled together.

2. The surgical electrosurgical unit according to claim 1, characterized in that, The first limiting segment is set as the first threaded segment (221), and the second limiting segment is set as the second threaded segment (311). When in the connected state, the first threaded segment (221) and the second threaded segment (311) are threadedly connected.

3. The surgical electrosurgical unit according to claim 2, characterized in that, The injection device (200) includes an injection syringe (210), a push rod (220), and an injection syringe cap (230). The injection syringe (210) is disposed inside the outer shell (100), and the injection syringe cap (230) is disposed on the opening at the end of the injection syringe (210) away from the electrosurgical body (10); The push rod (220) passes through the syringe cap (230) and extends into the syringe (210), and the push rod (220) is provided with the first threaded section (221).

4. The surgical electrosurgical unit according to claim 3, characterized in that, The connecting member (300) includes a rotating connecting part (310); The rotating connection part (310) is rotatably connected to the syringe cap (230), and the rotating connection part (310) is provided with a second threaded section (311) on the side near the push rod (220).

5. The surgical electrosurgical unit according to claim 4, characterized in that, The rotating connecting part (310) is provided with a rotating protrusion (312), and the syringe cap (230) is provided with a rotating hole (233). The rotating hole (233) is used for the rotating protrusion (312) to be inserted so that the rotating connecting part (310) can rotate around the rotating hole (233).

6. The surgical electrosurgical unit according to claim 4, characterized in that, The connecting member (300) also includes a locking part (320); The locking part (320) is slidably connected to the rotating connection part (310) so that the locking part (320) can move between the locked position and the unlocked position; When in the locked position, the locking part (320) abuts against the syringe cap (230) to restrict the rotation of the rotating connection part (310) relative to the syringe cap (230).

7. The surgical electrosurgical unit according to claim 6, characterized in that, The locking part (320) extends toward the syringe cap (230) and forms a locking protrusion (321). The syringe cap (230) extends toward the locking part (320) and forms an abutment protrusion (234). When in the locked position, the locking protrusion (321) is located at the bottom of the abutment protrusion (234), and the locking protrusion (321) abuts against the abutment protrusion (234).

8. The surgical electrosurgical unit according to claim 7, characterized in that, The rotating connection part (310) is provided with a sliding groove (313), and the locking part (320) has a sliding protrusion (322), and the sliding protrusion (322) extends into the sliding groove (313) so that the locking part (320) can slide along the sliding path formed by the sliding groove (313) so that the locking part (320) can move between the locked position and the unlocked position.

9. The surgical electrosurgical unit according to claim 8, characterized in that, The connecting member (300) further includes a locking elastic element (330); The locking elastic element (330) is disposed in the sliding groove (313), the locking elastic element (330) is sleeved on the sliding protrusion (322), and one end of the locking elastic element (330) is connected to the bottom of the sliding groove (313), and the other end of the locking elastic element (330) is connected to the locking part (320). The locking elastic element (330) is used to make the locking part (320) have a tendency to move towards the direction of the syringe cap (230).

10. The surgical electrosurgical unit according to claim 3, characterized in that, The injection syringe (210) has an opening at the end near the electrosurgical body (10) connected to a manifold (211). The manifold (211) is connected to an injection connection tube (212) and a replenishment connection tube (213). The injection connection tube (212) is used to allow the liquid in the injection syringe (210) to flow into the electrosurgical body (10), and the replenishment connection tube (213) is used to allow external liquid to flow into the injection syringe (210).

11. The surgical electrosurgical unit according to claim 10, characterized in that, The surgical electrosurgical unit also includes a flow control component (410). The flow direction control member (410) is disposed inside the manifold (211), and the flow direction control member (410) is configured to rotate along its own axis so that the flow direction control member (410) can rotate and switch between a first position and a second position; When the flow direction control component (410) is in the first position, the flow direction control component (410) is used to connect the injection syringe (210) with the injection communication tube (212); When the flow control component (410) is in the second position, the flow control component (410) is used to connect the injection syringe (210) with the fluid replenishment tube (213).

12. The surgical electrosurgical unit according to claim 11, characterized in that, The flow control component (410) has three interconnecting holes (411) that are spaced apart along the circumferential direction and communicate with each other. When the flow control component (410) is in the first position, the two connecting holes (411) are respectively connected to the injection syringe (210) and the injection connecting tube (212); When the flow control component (410) is in the second position, the two connecting holes (411) are respectively connected to the injection syringe (210) and the fluid replenishment connecting tube (213).

13. The surgical electrosurgical unit according to claim 12, characterized in that, The surgical electrosurgical unit also includes a flow control handle (420). The flow direction control handle (420) protrudes from the outer shell (100) and is fixedly connected to the flow direction control component (410). The flow direction control handle (420) is used to drive the flow direction control component (410) to rotate along its own axis.

14. The surgical electrosurgical unit according to claim 1, characterized in that, The surgical electrosurgical unit also includes a sliding connection (500); The main body (10) of the electrosurgical unit includes a cutting head (11), a drive tube (12) and an outer tube (13). The cutting head (11) is located at the far end of the outer tube (13) and has an injection hole. The outer tube (13) is connected to the outer shell (100). The drive tube (12) is located inside the outer tube (13). One end of the drive tube (12) is connected to the cutting head (11), and the other end of the drive tube (12) is connected to the injection device (200). The drive tube (12) is hollow so that the liquid in the injection device (200) can enter the injection hole along the drive tube (12). One end of the sliding connection (500) protrudes from the outer shell (100), the outer shell (100) is provided with a moving groove (110), and the other end of the sliding connection (500) passes through the moving groove (110) and is connected to the drive tube (12). The sliding connection (500) is configured to move along the moving groove (110) so as to drive the cutter head (11) to extend and retract relative to the outer tube (13) through the drive tube (12).

15. The surgical electrosurgical unit according to claim 14, characterized in that, The inner wall of the outer casing (100) is provided with a snap-fit ​​groove (120), and the sliding connection part (500) is provided with a snap-fit ​​protrusion (510). The snap-fit ​​protrusion (510) is configured to be inserted into the snap-fit ​​groove (120) to restrict the movement of the sliding connection part (500) relative to the outer casing (100).

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