Flexible electrotome pen fixed once and for all on the head of an ultrasonic aspirator

Abstract

The application discloses a flexible electric knife pen fixed on an ultrasonic suction knife head once, and belongs to the technical field of medical devices. The application provides a flexible electric knife pen capable of being combined with an ultrasonic suction knife. The electric knife pen comprises a flexible insulating shell, an electrode assembly, a plastic skeleton and an insulating barrier. The shell comprises an installation section sleeved on the outer periphery of the handle part of the ultrasonic suction knife and a working section extending outward. The plastic skeleton is embedded in the shell, so that the working section can be bent under the action of external force and keep the posture through plastic deformation, and the coagulation electrode is switched between the use position and the storage position. The insulating barrier is arranged on the surface of the working section, and when the working section is bent to the use position, the barrier is arranged between the coagulation electrode and the metal knife head of the ultrasonic suction knife. The application realizes the detachable integration of the electric knife pen on the ultrasonic suction knife, and the electric knife pen is stretched out during use and is stored and avoided during non-use, and meanwhile, the electric safety is ensured through the insulating barrier.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a flexible electrosurgical pen that can be permanently fixed to an ultrasonic aspiration blade. Background Technology

[0002] Ultrasonic aspiration scalpel (CUSA) is a surgical instrument that uses ultrasonic vibrations to pulverize and emulsify tissue while simultaneously suctioning it. It is widely used in surgeries requiring delicate dissection, such as liver resection and skull base tumor removal. A high-frequency electrosurgical unit (electrosurgical pen) uses high-frequency current to cut tissue and coagulate blood. In scenarios such as liver surgery, the two are often used in combination: the ultrasonic aspiration scalpel is used for precise dissection and separation of vascular systems, while the high-frequency electrosurgical unit is used to coagulate and stop bleeding from exposed blood vessels. Clinical studies show that the combined ultrasonic aspiration scalpel and high-frequency electrosurgical unit results in less bleeding and higher safety.

[0003] However, currently, ultrasonic aspiration scalpels and electrosurgical scalpels are two separate instruments, requiring surgeons to operate them with both hands or with the assistance of an assistant, switching between them as needed. Existing technologies have seen some attempts to integrate these two functions into a single instrument. For example, the CUSA Excel system integrates an electrosurgical module (CEM module) on the handle, enabling hemostasis at the tip of the ultrasonic scalpel. In addition, there are solutions that attach suction tubes to surgical instruments such as electrosurgical scalpels and ultrasonic scalpels, as well as technologies that integrate two different sizes of electrosurgical scalpel tips within the same housing, allowing for selective use via a sliding switch.

[0004] Nevertheless, existing technologies still have shortcomings. While integrated solutions such as CUSA Excel achieve the coexistence of ultrasound and electrocoagulation functions on the handle, the electrocoagulation function is limited to the front end of the ultrasonic scalpel tip and cannot provide electrocoagulation operations independent of the ultrasonic aspiration scalpel tip. Furthermore, solutions that simply attach an electrocautery pen to the ultrasonic scalpel or integrate multiple electrocautery tips do not solve the problems of how the electrocautery pen extends during use and retracts when not in use after being attached to the ultrasonic aspiration scalpel, nor how to prevent electrical interference between the electrocautery pen electrodes and the metal tip of the ultrasonic aspiration scalpel. Summary of the Invention

[0005] The technical problem this invention aims to solve is that existing methods of attaching an electrocautery pen to an ultrasonic aspiration scalpel cannot achieve the extension of the electrocoagulation electrode during use and its retraction when not in use, and there is a risk of electrical interference between the electrocoagulation electrode and the metal tip of the ultrasonic aspiration scalpel. To solve the above technical problem, this invention provides a flexible electrocautery pen that can be permanently fixed to the tip of an ultrasonic aspiration scalpel, comprising a shank for detachable installation on the ultrasonic aspiration scalpel. The electrocautery pen includes a housing and an electrode assembly embedded within the housing. The electrode assembly includes a wire and an electrocoagulation electrode connected to the distal end of the wire. The housing is a flexible insulating housing, including a mounting section sleeved around the outer periphery of the shank and a working section extending outward from the mounting section.

[0006] The electrosurgical pen also includes:

[0007] A malleable skeleton, embedded within the flexible insulating shell, extends at least from the mounting section to the end of the working section. It is used to allow the working section to bend around the interface between itself and the mounting section under external force, and to maintain the bent posture through the plastic deformation of the malleable skeleton, so as to switch the electrocoagulation electrode between the use position and the storage position. The working section can also be slidably disposed on the surface of the mounting section and is configured to slide along the axial direction first and then bend. The extension and positioning of the electrocoagulation electrode are achieved through the coordinated cooperation of sliding and bending.

[0008] An insulating barrier is disposed on the surface area of ​​the working section, for use when the working section is in the use position, at least a portion of the surface of the insulating barrier is positioned between the electrocoagulation electrode and the metal tip of the ultrasonic aspiration knife.

[0009] More preferably, the insulating barrier includes an arc-shaped shield fixedly disposed on the surface of the working section, a baffle hinged to one side of the arc-shaped shield, and a limiting slide block that slides with the arc-shaped shield. A positioning sleeve is fixedly disposed on the limiting slide block, and the positioning sleeve is used to install the limiting slide block to the front end of the handle of the ultrasonic suction knife.

[0010] More preferably, the surface of the limiting slide is provided with a sliding groove, the opening of the sliding groove is closed and the surface is provided with two limiting ports, an elastic sliding member is provided in the sliding groove, the top of the elastic sliding member extends out from one of the limiting ports and is fixedly connected to the inner surface of the arc-shaped cover.

[0011] More preferably, the elastic slider includes a push block and a slider, and springs at both ends fixedly connected to the surfaces of the push block and the slider, respectively. The push block extends out of the limiting opening, and the slider slides along the inside of the groove.

[0012] More preferably, the insulating barrier and the working section are separate structures, and the insulating barrier is installed on the surface of the working section. When the working section is bent to the use position, the insulating barrier abuts against the surface of the handle of the ultrasonic suction knife to maintain its barrier posture.

[0013] More preferably, the insulating barrier is disposed on the surface area of ​​the working section by at least one of sleeve, snap-fit, or adhesive.

[0014] More preferably, the insulating barrier is an arc-shaped cover plate integrally formed with the flexible insulating shell. The arc-shaped cover plate is located on the side surface of the working section facing the metal blade head. When the working section is bent to the use position, the arc-shaped cover plate blocks the side surface of the ultrasonic suction knife's metal blade head facing the electrocoagulation electrode, thereby cutting off the conductive path between the electrocoagulation electrode and the metal blade head.

[0015] More preferably, the malleable skeleton comprises:

[0016] The first reinforcing part is embedded in the installation section;

[0017] The second reinforcing part is embedded in the working section, and the stiffness of the second reinforcing part is greater than that of the first reinforcing part;

[0018] And the connecting portion between the first reinforcing portion and the second reinforcing portion.

[0019] More preferably, the first reinforcing part is a mesh-like sheet, embedded in the wall of the mounting section.

[0020] More preferably, the second reinforcing part includes a plurality of reinforcing ribs extending along the length direction of the working section, and the plurality of reinforcing ribs are distributed at intervals along the circumference of the working section.

[0021] More preferably, the surface of the mounting section is provided with a first locking position and a second locking position, wherein the first locking position and the second locking position are elastic grooves;

[0022] When the working section is bent to the usage position, the working section engages and is fixed with the first locking position;

[0023] When the working section is bent to the storage position, the working section engages and is fixed with the second locking position.

[0024] More preferably, the front end of the working section has an arc-shaped section, and when the working section is bent to the use position, the arc-shaped section is located beside the metal blade of the ultrasonic aspiration knife, and the electrocoagulation electrode is located in front of the distal end of the metal blade.

[0025] More preferably, the curvature of the inner surface of the working section is adapted to the curvature of the outer surface of the handle of the ultrasonic aspiration knife, so that when the working section is bent to the use position, the concave surface of the working section fits against the convex surface of the handle.

[0026] More preferably, the mounting section is provided with an anti-reuse structure, which is a breakable area. The breakable area is the area not covered by the first reinforcing part within the mounting section. When the electric knife pen is removed from the handle of the ultrasonic suction knife, the breakable area is cut off to achieve irreversible damage.

[0027] This application also provides a flexible electrosurgical pen that can be disposablely fixed to the tip of an ultrasonic aspiration scalpel, for detachable installation on the shank of the ultrasonic aspiration scalpel. The electrosurgical pen includes a housing and an electrode assembly embedded in the housing. The electrode assembly includes a wire and an electrocoagulation electrode connected to the distal end of the wire. The feature is that:

[0028] The outer shell is a flexible insulating shell, including a mounting section sleeved on the outer periphery of the cutter head shank and a working section sleeved in the mounting section and capable of sliding relative to each other along the axial direction of the mounting section, with the distal end of the working section extending beyond the mounting section;

[0029] The electrosurgical pen also includes:

[0030] A limiting slide is disposed between the mounting section and the working section, and is used to switch and lock the working section between the axial use position and the storage position relative to the mounting section;

[0031] An insulating barrier is disposed on the surface area of ​​the working section, for at least a portion of the surface of the insulating barrier to block the electrocoagulation electrode and the metal tip of the ultrasonic aspiration knife when the working section slides to the use position.

[0032] More preferably, the surface of the limiting slide is provided with a sliding groove, the opening of the sliding groove is closed and the surface is provided with two limiting ports, the two limiting ports correspond to the use position and the storage position respectively, and an elastic sliding member is provided in the sliding groove. The top of the elastic sliding member extends out from one of the limiting ports and is fixedly connected to the surface of the working section.

[0033] More preferably, the elastic slider includes a push block and a slider, and springs at both ends fixedly connected to the surfaces of the push block and the slider, respectively. The push block extends out of the limiting opening, and the slider slides along the inside of the groove.

[0034] Compared with the prior art, the present invention has the following beneficial effects: The present invention sets the flexible insulating shell as an installation section sleeved on the outer periphery of the blade handle and an outwardly extending working section, realizing the detachable integration of the electrocautery pen on the ultrasonic aspiration knife; by embedding a plastic skeleton in the working section, the working section can be bent under the action of external force and maintain the bent posture through plastic deformation, so that when in use, the electrocoagulation electrode can be extended to the front of the ultrasonic aspiration knife metal blade head for use, and when not in use, it can be bent back to avoid the ultrasonic aspiration knife metal blade head, effectively avoiding interference of the electrocautery pen with the normal aspiration and crushing function of the ultrasonic aspiration knife.

[0035] Meanwhile, by setting insulating barriers on the surface of the working section, when the working section is bent to the use position, at least part of the surface of the insulating barriers is blocked between the electrocoagulation electrode and the metal blade of the ultrasonic suction knife, which physically blocks the conductive path between the two, effectively preventing the accidental conduction of high-frequency high-voltage current to the metal blade and ensuring electrical safety when the two energy modes coexist in close proximity.

[0036] In addition, the arc-shaped section at the front end of the working section matches the curvature of the ultrasonic aspiration knife handle when bent to the use position, making the electrocoagulation electrode a natural extension of the metal knife head. Doctors can perform electrocoagulation without changing their grip posture, improving the comfort of operation. The first and second locking positions on the surface of the mounting section lock the working section in the use position and the storage position, respectively, preventing the working section from accidentally shifting during the operation, further improving the stability and reliability of use. Attached Figure Description

[0037] Figure 1 This is an exploded structural diagram of the electric knife pen of the present invention.

[0038] Figure 2 This is a schematic diagram of the overall structure of the movable partition structure used in this invention.

[0039] Figure 3 This is a schematic diagram of the overall structural state of the working section of the present invention when it is bent to the use position.

[0040] Figure 4 This is a schematic diagram of the overall structural state of the working section of the present invention when it is bent to the storage position.

[0041] Figure 5 This is a schematic diagram of the overall structural state of the working section of the present invention during the bending process under the action of external force, used to demonstrate the bending deformation characteristics of the plastic skeleton.

[0042] Figure 6 This is a schematic diagram illustrating how the integrally formed arc-shaped cover plate serves as an insulating barrier to physically isolate the metal blade from the electrocoagulation electrode in this invention.

[0043] Figure 7This is a schematic diagram of the structure of the plastic skeleton of the present invention.

[0044] Figure 8 This is a schematic diagram of an embodiment of the present invention in which the working section has an arc-shaped section at the front end, and the arc-shaped section is adapted to the curvature of the ultrasonic suction knife handle.

[0045] Figure 9 This is a schematic diagram of an embodiment of the present invention in which the electrosurgical pen has an overall sliding structure.

[0046] Figure 10 This is a schematic diagram of an embodiment of the present invention in which the surface of the mounting section is provided with a first locking position and a second locking position, and the working section can be respectively locked and fixed in the use position or the storage position.

[0047] Figure 11 This is a cross-sectional schematic diagram of the sliding structure scheme in this invention.

[0048] Figure 12 This is a schematic diagram of an embodiment of the present invention in which the positioning sleeve is fixed to the front end of the cutter head shank using a C-shaped or O-shaped ring structure.

[0049] Explanation of the labels in the diagram:

[0050] 1. Ultrasonic suction knife; 2. Knife head handle; 3. Electrosurgical pen; 4. Housing; 5. Wire; 6. Electrocoagulation electrode; 7. Mounting section; 8. Working section; 9. Plastic skeleton; 10. Insulating barrier (superior concept); 11. Arc-shaped cover plate (integrated embodiment of insulating barrier); 12. Metal knife head; 13. First reinforcing part; 14. Second reinforcing part; 15. Connecting part; 16. First locking position; 17. Second locking position; 18. Arc-shaped section; 19. Arc-shaped cover; 20. Baffle; 21. Limiting slide; 22. Positioning sleeve; 23. Slide groove; 24. Limiting port; 25. Elastic sliding part; 26. Push block; 27. Slider; 28. Spring. Detailed Implementation

[0051] The following embodiments further illustrate the content of the present invention, but should not be construed as limiting the present invention. Any modifications or substitutions made to the methods, steps, or conditions of the present invention without departing from the spirit and essence of the invention are within the scope of the present invention.

[0052] like Figures 1 to 12 As shown, the present invention provides a flexible electrosurgical pen that is disposablely fixed to the tip of an ultrasonic aspiration scalpel, for detachable installation on the shank 2 of an ultrasonic aspiration scalpel 1. The electrosurgical pen 3 includes a housing 4 and an electrode assembly embedded within the housing 4. The electrode assembly includes a wire 5 and an electrocoagulation electrode 6 connected to the distal end of the wire 5.

[0053] The outer shell 4 is a flexible insulating shell, made entirely of a flexible and bendable polymer material with electrical insulation properties, preferably medical-grade silicone or thermoplastic polyurethane elastomer (TPU), with a preferred Shore A hardness of 40 to 70. The flexible insulating shell 4 includes a mounting section 7 fitted around the outer periphery of the blade shank 2 and a working section 8 extending outward from the mounting section 7. The mounting section 7 is tubular and is fitted and secured to the outer periphery of the blade shank 2 of the ultrasonic aspiration knife 1 by the elasticity of the material. A wire 5 is embedded inside the working section 8. To prevent the wire 5 from breaking due to frequent bending of the working section 8, the wire 5 is spirally wound or has a reserved length in the bending area. The proximal end of the wire 5 is led out from the mounting section 7 for connection to the adapter plug of a standard high-frequency electrosurgical unit.

[0054] like Figure 7 As shown, the electrosurgical pen 3 also includes a malleable frame 9. The malleable frame 9 is embedded inside the wall of the flexible insulating shell 4, extending at least from the mounting section 7 to the end of the working section 8. The malleable frame 9 is made of a metallic material that is easily plastically deformed and can maintain its deformed posture, such as annealed pure copper wire, aluminum alloy wire, or medical-grade soft stainless steel wire. The malleable frame 9 is used to bend the working section 8 around its interface with the mounting section 7 under external force, and to maintain its bent posture through the plastic deformation of the malleable frame 9, thereby switching the electrocoagulation electrode 6 between its use position and its storage position.

[0055] To balance ease of installation with stability after bending, the malleable frame 9 employs a variable stiffness design. Specifically, the malleable frame 9 includes a first reinforcing part 13, a second reinforcing part 14, and a connecting part 15 between the two. The first reinforcing part 13 is embedded in the wall of the mounting section 7 and has a mesh-like structure. The mesh wire diameter is preferably 0.1 mm to 0.3 mm to reduce the overall radial stiffness, facilitating the elastic expansion of the mounting section 7 and its fitting into the cutter head shank 2. The second reinforcing part 14 is embedded in the working section 8 and includes multiple reinforcing ribs extending along the length of the working section 8. These reinforcing ribs are spaced apart circumferentially along the working section 8, and their diameter is preferably 0.5 mm to 1.2 mm. The stiffness of the second reinforcing part 14 is greater than that of the first reinforcing part 13, thus providing higher bending stiffness to the working section 8. The connecting part 15 serves as the force-bearing hub when the working section 8 bends.

[0056] To address electrical interference issues, the electrosurgical pen 3 also includes an insulating barrier 10 disposed on the surface area of ​​the working section 8. The insulating barrier 10 is made of a high-temperature resistant insulating material, such as polytetrafluoroethylene (PTFE) or polyetheretherketone (PEEK), preferably with a thickness of 0.5 mm to 2.0 mm and a withstand voltage rating greater than 5000V. Preferably, when the working section 8 is bent to the usage position, the electrical clearance between the electrocoagulation electrode 6 and the metal tip 12 of the ultrasonic aspiration scalpel 1 is ≥10 mm, and the creepage distance is ≥16 mm, to meet the safety requirements for basic insulation in medical electrical equipment standards. When the working section 8 is bent to the usage position, at least a portion of the surface of the insulating barrier 10 is positioned between the electrocoagulation electrode 6 and the metal tip 12 of the ultrasonic aspiration scalpel 1.

[0057] The insulating barrier 10 can adopt a movable barrier structure, which is installed on the surface of the working section 8 through a sliding and flipping linkage mechanism. Specifically, it includes an arc-shaped cover 19, a baffle 20, a limiting slide 21, and a positioning sleeve 22.

[0058] The arc-shaped baffle 19 has an arc-shaped plate structure that is adapted to the outer surface of the working section 8. It is made of high-temperature resistant insulating material (preferably polytetrafluoroethylene or polyether ether ketone), fixedly set on the surface of the working section 8, and can slide back and forth along the length direction of the front end surface of the cutter head shank (2) through the limiting slide 21.

[0059] The limiting slide 21 is block-shaped and is installed on the front end of the handle 2 of the ultrasonic suction knife 1 via a positioning sleeve 22. A groove 23 is formed inside the slide 21 along its length. A sealing structure is provided at the opening of the groove 23 to close it. Two spaced limiting openings 24 are formed on the top surface of the groove 23, corresponding to the usage position and the storage position, respectively. An elastic sliding member 25 is provided inside the groove 23. The elastic sliding member 25 includes a push block 26, a slider 27, and a spring 28 connecting the two. The top of the push block 26 extends out of one of the limiting openings 24 from the groove 23 and is fixedly connected to the inner surface of the arc-shaped baffle 19. The slider 27 is entirely located inside the groove 23 and can slide freely along its length. Both ends of the spring 28 are fixedly connected to the push block 26 and the slider 27, respectively. In its natural state, the spring 28 is in a predetermined state of compression or tension, so that the push block 26 is elastically limited in the first limiting opening 24 or the second limiting opening 24. When the operator applies external force to press down the arc-shaped baffle 19, and at the same time presses the push block 26, the spring 28 is compressed and disengaged from the current limit port 24 and returns to the slide groove 23. The arc-shaped baffle 19 is continued to be pushed, so that the push block 26 drives the slider 27 to slide along the slide groove 23 to another limit port 24. Under the elastic reset action of the spring 28, it pushes in and locks in the limit port 24, thereby realizing the switching and stable locking of the arc-shaped baffle 19 between two predetermined positions.

[0060] The baffle 20 is hinged to one end (i.e., the distal end) of the metal blade 12 near the ultrasonic aspiration knife 1 of the arc-shaped baffle 19. The baffle 20 can rotate within the range of 0° to 270°. The rotation of the baffle 20 is coordinated with the sliding position of the arc-shaped baffle 19. The specific working process and operating principle are as follows:

[0061] When the ultrasonic aspiration scalpel 1 is needed for pulverization and aspiration (i.e., the electrocoagulation electrode 6 is in the retracted position): the operator applies external force to slide the arc-shaped baffle 19 away from the metal blade head 12 along the limiting slide 21, so that the arc-shaped baffle 19 avoids the working area of ​​the metal blade head 12. During this sliding process, since the baffle 20 is hinged to the distal end of the arc-shaped baffle 19 and is in contact with or close to the surface of the metal blade head 12, the baffle 20 is blocked by the outer contour of the metal blade head 12. As the arc-shaped baffle 19 moves proximally, the baffle 20 flips outward around the hinge (or folds to one side and retracts), so that the metal blade head 12 is fully exposed in the surgical field of vision, ensuring that the normal aspiration and pulverization function of the ultrasonic aspiration scalpel 1 is not interfered with in any way.

[0062] When the electrocoagulation electrode 6 is needed for hemostasis (i.e., the electrocoagulation electrode 6 is switched to the usage position): the operator applies external force to slide the arc-shaped shield 19 along the limiting slide 21 towards the metal blade head 12. As the arc-shaped shield 19 moves to the distal end, the baffle 20 moves forward accordingly. When the baffle 20 passes the distal edge of the metal blade head 12, it loses the support of the metal blade head 12. Under the action of gravity, the baffle 20 automatically flips in the opposite direction around the hinge, switching from the unfolded state to the shielded state. At this time, the arc-shaped shield 19 and the baffle 20 together form a complete insulating barrier surface. The plate surface of the baffle 20 extends along the axial direction of the metal blade head 12 and shields the side of the metal blade head 12 facing the electrocoagulation electrode 6. The arc-shaped shield 19 covers the surface area of ​​the working section 8. The two work together to physically cut off the air path of the high-frequency current arcing to the metal blade head 12, ensuring that the electrocoagulation electrode 6 will not cause any electrical interference to the metal blade head 12 during use. It should be noted that in this embodiment, the middle section of the working section 8 is flexible to accommodate the movement of the arc-shaped baffle 19, while the area between the arc-shaped baffle 19 and the connecting electrocoagulation electrode in the working section 8 is rigid to ensure operational stability.

[0063] The front end of the limiting slide 21 is fixedly provided with a positioning sleeve 22. The positioning sleeve 22 has a C-shaped or O-shaped ring structure. It is fitted and fastened to the outer periphery of the front end of the handle 2 of the ultrasonic suction knife 1 by means of material elastic interference fit, thereby positioning the entire limiting slide 21 and the arc-shaped cover 19 at the predetermined position of the handle 2.

[0064] In this application, the flipping of the baffle 20 and the sliding of the arc-shaped shield 19 are designed as a mechanical linkage. The operator can automatically unfold and fold the baffle 20 when switching between electrocoagulation mode and ultrasound mode without any additional action, making it highly convenient to use. At the same time, the setting of two limiting ports 24 ensures that the arc-shaped shield 19 can be stably maintained in both the use position and the storage position, and will not be accidentally displaced due to vibration or touch during surgery.

[0065] The insulating barrier 10 can be of an integral or separate structure:

[0066] In a preferred embodiment, such as Figure 3 , Figure 5 and Figure 6 As shown, the insulating barrier 10 is an arc-shaped cover 11 integrally formed with the flexible insulating shell 4. The arc-shaped cover 11 is located on the side surface of the working section 8 facing the metal blade head 12. When the working section 8 is bent to the use position, the arc-shaped cover 11 blocks the side surface of the metal blade head 12 of the ultrasonic suction knife 1 facing the electrocoagulation electrode 6, physically cutting off the air path of the high-frequency current arcing to the metal blade head 12, and isolating the conductive path between the electrocoagulation electrode 6 and the metal blade head 12.

[0067] In another embodiment, such as Figure 1 As shown, the insulating barrier 10 and the working section 8 are separate structures. The bottom of the insulating barrier 10 has an elastic C-shaped retaining ring or a closing collar, which is installed on the surface of the working section 8 by at least one of the following methods: sleeve, snap-fit, or adhesive. When the working section 8 is bent to the use position, the insulating barrier 10 abuts against the surface of the blade shank 2 of the ultrasonic suction knife 1 to obtain mechanical support and maintain its stable barrier posture.

[0068] like Figure 10 As shown, to further improve the fixation reliability of the working segment 8 in a specific position, the surface of the mounting segment 7 is provided with a first locking position 16 and a second locking position 17. Both the first locking position 16 and the second locking position 17 are inwardly recessed C-shaped elastic grooves, and the opening width is preferably 80% to 95% of the outer diameter of the working segment 8. When the working segment 8 is bent to the use position by external force, the tube body of the working segment 8 is pressed and elastically locked into the first locking position 16 for fixation; when the working segment 8 is bent to the storage position, the tube body of the working segment 8 is pressed and locked into the second locking position 17 for fixation, effectively preventing the working segment 8 from accidentally popping open or shifting during the operation.

[0069] like Figure 7 and Figure 8As shown, to optimize spatial layout and improve operational convenience, the front end of the working section 8 has an arc-shaped section 18. The curvature of the inner surface of the working section 8 is adapted to the curvature of the outer surface of the handle 2 of the ultrasonic suction knife 1, and the difference between their radii of curvature is preferably within ±5%. When the working section 8 is bent to the use position, its concave surface fits against the convex surface of the handle 2, allowing the arc-shaped section 18 to naturally extend forward along the extension direction of the handle 2. At this time, the arc-shaped cover plate 11 just covers the side of the metal knife head 12 facing the electrocoagulation electrode 6, isolating the metal knife head 12 from the electrocoagulation electrode 6; the electrocoagulation electrode 6 is located in front of the distal end of the metal knife head 12, and its axis is approximately parallel or coincident with the axis of the metal knife head 12 in space. Therefore, when using the electrocoagulation function, the doctor does not need to change the hand position and operating posture of holding the ultrasonic aspiration knife 1. It is only equivalent to the distal working length of the ultrasonic aspiration knife 1 being extended forward, and the electrocoagulation electrode 6 naturally extends to the surgical area. The metal blade 12 is shielded by the arc-shaped cover plate 11 and will not interfere with the electrocoagulation operation, thereby improving the comfort of operation while ensuring the safety of the surgery.

[0070] Furthermore, to ensure from a physical structure perspective that the electric drill 3 can only be used once, and to prevent the risk of cross-infection or electrical safety hazards caused by accidental reuse, an anti-reuse structure can also be integrated into the mounting section 7. Specifically, combined with Figure 2 As shown, since the first reinforcing part 13 is a mesh-like sheet and is only embedded in part of the wall of the mounting section 7, it does not completely cover the entire circumferential area of ​​the mounting section 7 (i.e., there are weak areas in the wall of the mounting section without skeleton coverage). When the electrosurgical pen needs to be removed after the operation, the operator can directly use surgical scissors or a knife to cut it off on the side wall of the mounting section 7 that does not cover the first reinforcing part 13. After cutting, the mounting section 7 loses its complete circumferential support and binding force, and cannot be securely fitted and fixed to the blade handle 2 again, thus achieving irreversible physical destruction after single use. This solution does not require additional independent parts; it only relies on the discontinuous layout of the plastic skeleton 9 itself to achieve the purpose of preventing reuse, with a simple structure and high reliability.

[0071] The actual working process and action steps of the electric knife pen 3 of this invention are as follows:

[0072] First, the mounting section 7 of the electrosurgical pen 3 is fitted and fixed onto the handle 2 of the ultrasonic aspiration knife 1, and the proximal end of the wire 5 is connected to the high-frequency electrosurgical unit.

[0073] When only fine dissection or pulverization / aspiration is required during surgery, such as... Figure 4 and Figure 7As shown, the doctor applies external force to bend the working section 8 backward or to the side to the storage position (if a second locking position 17 is provided, the working section 8 is locked into the second locking position 17). At this time, the electrocoagulation electrode 6 avoids the metal blade head 12, and does not interfere with the normal working field of view and mechanical movement of the ultrasonic aspiration knife 1.

[0074] When bleeding points are encountered during surgery and electrocoagulation is required for hemostasis, such as Figure 3 , Figure 5 and Figure 6 As shown, the doctor applies external force to bend the working section 8 forward to the use position (if a first locking position 16 is provided, the working section 8 is locked into the first locking position 16). Supported by the plastic deformation of the malleable skeleton 9, the working section 8 stably maintains its extended position. At this time, the electrocoagulation electrode 6 extends to the front of the metal blade 12, forming a natural extension of the metal blade 12. The doctor does not need to consider the clearance between the two instrument heads or change the original grip posture to directly perform electrocoagulation. Simultaneously, the insulating barrier 10 (or the arc-shaped cover 11) is inserted and shields the electrocoagulation electrode 6 and the metal blade 12, effectively preventing the accidental conduction of high-frequency, high-voltage current to the metal blade 12, ensuring electrical safety when the two energy modes coexist in close proximity. After hemostasis is completed, the working section 8 can be bent back to the storage position.

[0075] In another independent embodiment of the invention, such as Figure 11 As shown, the flexible electrosurgical pen uses a sliding structure to switch the electrocoating electrode 6 between the usage position and the storage position.

[0076] In this design, the outer shell 4 is a flexible insulating shell, comprising a mounting section 7 and a working section 8. The mounting section 7 is tubular in shape and is fitted and secured to the outer periphery of the handle 2 of the ultrasonic aspiration knife 1 using material elasticity. The working section 8 is also tubular and slides along the length of the mounting section 7. A wire 5 is embedded inside the working section 8. The distal end of the wire 5 is connected to an electrocoagulation electrode 6, and the proximal end of the wire 5 extends from the working section 8, passes through the inner cavity of the mounting section 7, and finally connects to the adapter plug of the standard high-frequency electrosurgical unit. To prevent the wire 5 from tangling or breaking during sliding, the wire 5 is spirally wound inside the mounting section 7 with a length allowance.

[0077] A limiting slide block 21 is fixedly mounted on the outer surface of the working section 8. The limiting slide block 21 is block-shaped, and its surface has a groove 23 along the axial direction. The groove 23 has a sealing structure at the opening to close the groove 23. The top wall surface of the groove 23 has two spaced limiting openings 24 along the axial direction, corresponding to the use position and the storage position, respectively. An elastic sliding member 25 is provided inside the groove 23. The elastic sliding member 25 includes a push block 26, a slider 27, and a spring 28 connecting the two. The top of the push block 26 extends out of the groove 23 from one of the limiting openings 24 and is fixedly connected to the outer surface of the mounting section 7. The slider 27 is located entirely inside the groove 23 and can slide freely along the length of the groove 23. In its natural state, the spring 28 is in a predetermined state of compression or tension, so that the first slider 27 is elastically limited in one of the limiting openings 24.

[0078] An insulating baffle 10 is disposed on the surface area of ​​the working section 8 facing the metal cutter head 12. It can be an arc-shaped cover plate 11 structure integrally formed with the working section 8. The insulating baffle 10 is preferably made of high-temperature resistant insulating material (such as polytetrafluoroethylene or polyetheretherketone), with a thickness preferably of 0.5 mm to 2.0 mm and a withstand voltage rating greater than 5000V.

[0079] The actual working process and action steps of this sliding flexible electrosurgical pen are as follows:

[0080] In the initial state, the working section 8 is in the retracted position, that is, the push block 26 is elastically locked in the limiting port 24 away from the metal blade head 12. At this time, the working section 8 moves towards the end along the installation section 7, and the electrocoagulation electrode 6 avoids the metal blade head 12, without interfering with the normal working field of view and mechanical action of the ultrasonic suction knife 1.

[0081] When electrocoagulation is required to stop bleeding during surgery, the operator holds the proximal end of the working section 8 and applies a pushing force towards the distal end. The working section 8 moves forward (towards the metal blade head 12) along with the push block 26, which is fixedly connected to it. The first slider 27 disengages from the current limiting port 24 against the elastic force of the spring 28 and slides along the slide groove 23 towards the metal blade head 12. When the push block 26 slides to the limiting port 24 near the metal blade head 12, it is pushed in and locked in the first limiting port 24 by the elastic restoring force of the spring 28, making a "click" sound to indicate to the operator that the locking is in place. At this time, the working section 8 extends forward a predetermined distance relative to the mounting section 7, and the electrocoagulation electrode 6 located at the distal end of the working section 8 extends to the front of the metal blade head 12, forming a natural extension of the metal blade head 12. At the same time, the insulating barrier 10 moves forward with the working section 8 and is positioned precisely between the electrocoagulation electrode 6 and the metal blade 12, physically cutting off the air path for the high-frequency current to arc to the metal blade 12, ensuring the safety of the electrocoagulation operation. Doctors can directly perform electrocoagulation hemostasis without changing their grip posture.

[0082] After hemostasis is completed, the operator holds the proximal end of the working section 8 and applies a pulling force towards the proximal end. The first slider 27 overcomes the elastic force of the spring 28 and disengages from the first limiting port near the metal blade head 12 and slides along the slide groove 23 towards the proximal end until it enters the limiting port 24 away from the metal blade head 12 and is locked by the spring 28. The working section 8 then returns to the storage position, the electrocoagulation electrode 6 avoids the metal blade head 12 again, and the ultrasonic suction knife 1 resumes independent working state.

[0083] This sliding approach and the aforementioned bending approach constitute two independent implementation methods. Both share the common feature of using an insulating barrier 10 to physically isolate the electrocoagulation electrode 6 from the metal blade 12, ensuring electrical safety. The difference lies in the position switching method—the former uses axial sliding, while the latter uses bending deformation. The two approaches can be flexibly selected based on actual surgical habits and operating space.

[0084] In another implementation, the working section 8 is slidably disposed within the mounting section 7 and can slide relative to it along the axial direction of the mounting section 7. The plastic skeleton 9 adopts a variable stiffness design: the part near the working section has lower stiffness to facilitate sliding; the part in the boundary area has moderate stiffness to serve as a bending deformation zone; and the part at the far end of the working section has higher stiffness to provide stable support after bending.

[0085] In use, the operator first pushes the working section 8 along the mounting section 7 to the extended position, then applies force to bend the working section 8 at the junction area, thereby positioning the electrocoagulation electrode 6 in front of the distal end of the metal blade 12. Sliding provides axial travel, and bending adjusts the extension direction; the two actions occur sequentially in time and do not interfere with each other spatially. The insulating barrier 10 moves with the working section 8 and acts as a barrier between the electrocoagulation electrode 6 and the metal blade 12. After hemostasis is achieved, the section is first bent in the opposite direction and then slid back to the storage position.

[0086] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. The above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible electrosurgical pen that is fixed to the head of an ultrasonic aspiration knife in one piece, for detachably mounted on the handle (2) of an ultrasonic aspiration knife (1), the electrosurgical pen (3) comprising a housing (4) and an electrode assembly embedded in the housing (4), the electrode assembly comprising a wire (5) and an electrocoagulation electrode (6) connected to the distal end of the wire (5), characterized in that: The outer shell (4) is a flexible insulating shell, including a mounting section (7) sleeved on the outer periphery of the blade shank (2) and a working section (8) extending outward from the mounting section (7). The electric knife pen (3) also includes: A plastic skeleton (9) is embedded in the flexible insulating shell (4) and extends at least from the mounting section (7) to the end of the working section (8). It is used to make the working section (8) bend around the junction area with the mounting section (7) under the action of external force, and maintain the bent posture through the plastic deformation of the plastic skeleton (9) so as to switch the electrocoagulation electrode (6) between the use position and the storage position. An insulating barrier (10) is disposed on the surface area of ​​the working section (8) for at least a portion of the surface of the insulating barrier (10) to be separated between the electrocoagulation electrode (6) and the metal tip (12) of the ultrasonic aspiration knife (1) when the working section (8) is in the use position.

2. The flexible electrosurgical pen according to claim 1, characterized in that, The insulating barrier (10) includes an arc-shaped shield (19) fixedly disposed on the surface of the working section (8), a baffle (20) hinged to one side of the arc-shaped shield (19), and a limiting slide (21) that slides with the arc-shaped shield (19). A positioning sleeve (22) is fixedly disposed on the limiting slide (21), and the positioning sleeve (22) is used to install the limiting slide (21) to the front end of the blade handle (2) of the ultrasonic aspiration knife (1).

3. The flexible electrosurgical pen according to claim 2, characterized in that, The surface of the limiting slide (21) is provided with a slide groove (23). The opening of the slide groove (23) is closed and two limiting ports (24) are provided on the surface. The two limiting ports (24) correspond to the use position and the storage position respectively. An elastic sliding member (25) is provided in the slide groove (23). The top of the elastic sliding member (25) extends out from one of the limiting ports (24) and is fixedly connected to the inner surface of the arc-shaped cover (19).

4. The flexible electrosurgical pen according to claim 3, characterized in that, The elastic slider (25) includes a push block (26) and a slider (27), and a spring (28) with its two ends fixedly connected to the surfaces of the push block (26) and the slider (27) respectively. The push block (26) extends out of the limiting port (24), and the slider (27) slides along the inside of the groove (23).

5. The flexible electrosurgical pen according to claim 1, characterized in that, The insulating barrier (10) is an arc-shaped cover (11) integrally formed with the flexible insulating shell (4). The arc-shaped cover (11) is located on the side surface of the working section (8) facing the metal blade (12). When the working section (8) is bent to the use position, the arc-shaped cover (11) covers the side surface of the metal blade (12) of the ultrasonic suction knife (1) facing the electrocoagulation electrode (6) to cut off the conductive path between the electrocoagulation electrode (6) and the metal blade (12).

6. The flexible electrosurgical pen according to claim 1, characterized in that, The malleable skeleton (9) includes: The first reinforcing part (13) is embedded in the installation section (7); The second reinforcing part (14) is embedded in the working section (8), and the stiffness of the second reinforcing part (14) is greater than that of the first reinforcing part (13). And a connecting portion (15) connecting the first reinforcing portion (13) and the second reinforcing portion (14).

7. The flexible electrosurgical pen according to claim 6, characterized in that, The first reinforcing part (13) is a grid-shaped sheet body, which is embedded in the wall of the installation section (7). The second reinforcing part (14) includes multiple reinforcing ribs extending along the length direction of the working section (8), and the multiple reinforcing ribs are distributed circumferentially along the working section (8).

8. The flexible electrosurgical pen according to claim 1, characterized in that, The surface of the mounting section (7) is provided with a first locking position (16) and a second locking position (17), wherein the first locking position (16) and the second locking position (17) are elastic grooves; When the working section (8) is bent to the use position, the working section (8) engages and is fixed with the first locking position (16); When the working section (8) is bent to the storage position, the working section (8) engages and is fixed with the second locking position (17).

9. The flexible electrosurgical pen according to claim 1, characterized in that, The front end of the working section (8) has an arc-shaped section (18). When the working section (8) is bent to the use position, the arc-shaped section (18) is located next to the metal blade (12) of the ultrasonic aspiration knife (1), and the electrocoagulation electrode (6) is located in front of the far end of the metal blade (12).

10. A flexible electrosurgical pen that is fixed to the head of an ultrasonic aspiration knife in one piece, for detachably mounted on the handle (2) of an ultrasonic aspiration knife (1), the electrosurgical pen (3) comprising a housing (4) and an electrode assembly embedded in the housing (4), the electrode assembly comprising a wire (5) and an electrocoagulation electrode (6) connected to the distal end of the wire (5), characterized in that: The outer shell (4) is a flexible insulating shell, including a mounting section (7) sleeved on the outer periphery of the blade shank (2) and a working section (8) that slides along the length of the surface of the mounting section (7). The electric knife pen (3) also includes: The limiting slide (21) is fixedly disposed between the mounting section (7) and the working section (8) for switching and locking the working section (8) between the axial use position and the storage position relative to the mounting section (7); An insulating barrier (10) is disposed on the surface area of ​​the working section (8) for at least a portion of its surface to be positioned between the electrocoagulation electrode (6) and the metal tip (12) of the ultrasonic aspiration knife (1) when the working section (8) is slid to the use position.

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