Electrical instrument

Abstract

The invention discloses a high-frequency electric instrument especially suitable for being used in cooperation with an endoscope, and the instrument comprises a sheath tube which is internally provided with a flow guide tube in a penetrating manner; the O-shaped knife is fixed at the front end of the sheathing canal; the ceramic head is fixed at the front end part of the O-shaped knife; the pad is fixed at the front end of the sheathing canal, and the O-shaped knife is fixed at the front end of the sheathing canal through the pad; the I knife penetrates through the O knife and comprises a far-end head protruding outwards in the radial direction, the rear end of the I knife is fixedly connected with the front end of the flow guide pipe, the I knife is provided with an inner cavity communicated with the inner cavity channel of the flow guide pipe, and the liquid leaves the electric instrument only through the I knife. According to the electric instrument, the functions of an I knife, an O knife and an injection needle are integrated into one, a doctor can perform corresponding operation according to needs, and therefore the time for replacing the instrument is saved.

Description

[0001] This invention application is a divisional application of the invention patent application filed on July 8, 2020, with application number "202010653050.5" and invention title "A high-frequency electrical device for use with an endoscope". Technical Field

[0002] This invention relates to the field of medical device technology, and more specifically, to an electrical device, particularly a high-frequency electrical device used in conjunction with an endoscope. Background Technology

[0003] With the development of endoscopic technology and other related technologies, endoscopic treatment and screening for early gastrointestinal cancers have become the preferred treatment method. Currently, routine treatment for early gastrointestinal cancers often requires the use of numerous instruments. For example, a needle is first used to mark or inject the lesion to make it bulge, then an electrocautery knife is used for resection or dissection, and finally, hemostatic clips, an electrocautery knife, or a needle are used for suturing or hemostasis. The procedure is cumbersome, with frequent instrument changes, resulting in low surgical efficiency and requiring high levels of surgical skill. Instrument changes also increase patient discomfort and relatively high surgical costs.

[0004] Chinese patent application CN108523986A discloses a high-frequency cutting tool with an injection needle for endoscopy. During operation, the high-frequency cutting tool requires a locking mechanism to lock the two-finger handle to prevent accidental slippage of the axial electrode, which causes inconvenience to medical staff. If the locking mechanism is not locked, a linkage phenomenon will occur when moving the two-finger handle or the slider, which may lead to misoperation and accidental injury to the patient. At the same time, the axial electrode and the needle tube are arranged side by side in the outer sheath, resulting in a large radial dimension of the outer sheath.

[0005] Chinese patent application publication number CN109771027A discloses a multifunctional cutting knife, which is composed of a conductive injection knife head, a snare, a pull cable, an outer tube assembly, and a core rod equipped with a slip ring and an electrode plug. It has the functions of tissue stripping and water injection before and during endoscopic mucosal dissection surgery.

[0006] Chinese patent CN209074869U discloses a novel mucosal incision knife, which integrates a mucosal incision knife and an injection needle into different cavities of a dual-lumen catheter, thereby achieving the integration of the functions of an injection needle and a mucosal incision knife.

[0007] Chinese patent CN209186932U discloses an endoscopic high-frequency electrosurgical unit with a liquid injection structure, which relates to an endoscopic high-frequency electrosurgical unit that uses the gap between the blade body and the distal limiting ring to form a liquid injection channel to achieve the injection function.

[0008] Chinese patent CN209186930U discloses a high-frequency electrosurgical knife for endoscopy with dual blades. It relates to a high-frequency electrosurgical knife for endoscopy with dual blades, in which the contraction movement of one blade is controlled by the other blade through a damping structure between the two blades.

[0009] Chinese patent CN209916189U discloses a bile duct mucosa electrocoagulation ball, which relates to a bile duct mucosa electrocoagulation ball. The device has an electrocoagulator added to the front end, which can perform electrocoagulation hemostasis in time during surgery.

[0010] US Patent No. US20190298435A1 relates to a high-frequency electrosurgical device with injection function, which is connected to an electrode with an electrode cavity at the distal end of a shaft containing a central cavity, and the electrode has one or more electrode cavity outlets at different angles.

[0011] The aforementioned patents still have some drawbacks, including:

[0012] 1) The functions are not diversified enough and still cannot meet the doctors' multifunctional needs for high-frequency electrical devices;

[0013] 2) Some unnecessary procedures are required when performing injections or electrocautery, which increases the workload of doctors;

[0014] 3) The structure is relatively complex and the manufacturing cost is high. Summary of the Invention

[0015] To address the shortcomings of existing technologies, this invention provides a high-frequency electrosurgical device for use with an endoscope. This device integrates the functions of an I-knife, an O-knife, and an injection needle, achieving a three-in-one operation. Doctors can perform corresponding operations as needed, thus saving time on changing instruments and improving surgical efficiency.

[0016] To achieve the above objectives, the present invention provides the following technical solution: a high-frequency electrical device for use with an endoscope, comprising a sheath, an I-blade, an O-blade, a first handle, a second handle, an electrode base, and an injection interface;

[0017] The rear end of the sheath is fixedly connected to the second handle, and a spring guide tube is inserted inside the sheath; a first handle is slidably mounted on the second handle, and the rear end of the spring guide tube is fixedly connected to the first handle. The first handle slides back and forth on the second handle and drives the spring guide tube to slide back and forth relative to the sheath; at the same time, the spring guide tube is electrically connected to the connector on the electrode seat, and the inner cavity of the spring guide tube is connected to the injection port.

[0018] An outer sheath is fitted over the sheath tube. The front part of the outer sheath tube is through which the O-blade and the I-blade pass. The I-blade passes through the O-blade, and the rear end of the I-blade is fixedly connected to the front end of the spring guide tube. The O-blade is fixed to the front end of the sheath tube, and a radial electrode is also fixed on the O-blade. The outer sheath tube can slide backward relative to the sheath tube to expose the O-blade.

[0019] The I-blade has an inner cavity that is connected to the inner cavity of the spring guide tube; the spring guide tube moves back and forth, causing the I-blade to extend and retract from the front end of the outer sheath.

[0020] In the technical solution of this application, the spring guide tube serves as both a conduit and a conductor. During cutting, the spring guide tube, the electrodes on the electrode holder, and the I-blade connect to form an electrical circuit. During injection, the spring guide tube, the injection port, and the inner cavity of the I-blade connect to form an injection channel. Thus, on the one hand, the reverse movement of the corresponding driving components between the liquid injection and electro-cutting functions completely eliminates the possibility of accidental activation of the standby function, preventing accidental injury to the patient or interference with the surgical procedure. Simultaneously, it reduces unnecessary movements during the doctor's operation, improving surgical efficiency. Secondly, it avoids the possibility of misoperation caused by the simultaneous movement of multiple functional components. On the other hand, it reduces the radial dimension of the sheath, and the internal structure of the instrument is simpler.

[0021] Preferably, a sleeve is also fixed to the front end of the second handle.

[0022] Preferably, the outer sheath tube has an outer sheath handle fixed to its rear end. The outer sheath handle is attached to the sheath tube, and the outer sheath handle moves backward, causing the outer sheath tube to move backward relative to the sheath tube.

[0023] Preferably, the spring guide tube is covered with a plastic coating.

[0024] Preferably, the second handle includes a handle body and a thumb ring fixed to the rear end of the handle body; the first handle has a double-finger ring structure.

[0025] Preferably, a ceramic head is fixed to the front end of the O-blade.

[0026] Preferably, the injection port is fixed to the first handle.

[0027] Preferably, a ceramic pad is also inserted and fixed at the front end of the sheath, and the O-blade is fixed to the front end of the sheath through the ceramic pad.

[0028] Preferably, the ceramic pad is cylindrical, and the outer peripheral wall of the ceramic pad is serrated.

[0029] Preferably, the electrode holder and the second handle are connected by snap-fit, interference fit or threaded connection.

[0030] The present invention also provides the following technical solution: an electrical device, comprising: a sheath, wherein a flow guide tube is inserted through the sheath; an O-blade fixed to the front end of the sheath; a ceramic head fixed to the front end of the O-blade; a pad fixed to the front end of the sheath, wherein the O-blade is fixed to the front end of the sheath via the pad; and an I-blade penetrating the O-blade and including a radially outwardly protruding distal head, wherein the rear end of the I-blade is fixedly connected to the front end of the flow guide tube, the I-blade has an inner cavity communicating with the inner cavity of the flow guide tube, and liquid exits the electrical device only through the I-blade.

[0031] Preferably, the guide tube is a spring guide tube.

[0032] Preferably, the pad is a ceramic pad, and the ceramic pad is cylindrical with a toothed outer peripheral wall.

[0033] Preferably, the electrical device further includes: a first handle, the rear end of the guide tube being fixedly connected to the first handle; a second handle, the rear end of the sheath being fixedly connected to the second handle, wherein the first handle slides back and forth on the second handle and drives the guide tube to slide back and forth relative to the sheath; an outer sheath, sleeved over the sheath, with the O-blade and the I-blade passing through its front end; and a sleeve, fixed to the front end of the second handle, wherein the outer sheath slides backward to abut against the sleeve to expose the O-blade.

[0034] Preferably, the electrical device further includes: an electrode holder, which is connected to the second handle by snap-fit, interference fit, or thread, and the flow guide tube is electrically connected to the connector on the electrode holder; and an injection port, which is fixed on the first handle, and the inner cavity of the flow guide tube communicates with the injection port.

[0035] Preferably, a radial electrode is fixed on the O-blade.

[0036] Preferably, the guide tube moves back and forth, causing the I-blade to extend and retract from the front end of the outer sheath.

[0037] Preferably, the first handle has a double-finger ring structure, the second handle includes a handle body and a thumb ring fixed to the rear end of the handle body, and an outer sheath handle is fixed to the rear end of the outer sheath tube. The outer sheath handle is attached to the sheath tube, and the outer sheath handle moves backward and drives the outer sheath tube to move backward relative to the sheath tube.

[0038] Preferably, the guide tube is covered with a plastic coating.

[0039] Preferably, the electrical device is used in conjunction with an endoscope.

[0040] The present invention also provides the following technical solution: an electrical device, comprising: a sheath, wherein a spring guide tube is inserted inside the sheath; an O-blade, fixed to the front end of the sheath; and an I-blade, penetrating the O-blade, wherein the rear end of the I-blade is fixedly connected to the front end of the spring guide tube, and the I-blade has an inner cavity communicating with the inner cavity of the spring guide tube.

[0041] Preferably, a ceramic pad is fixed to the front end of the sheath, and the O-blade is fixed to the front end of the sheath by the ceramic pad. The ceramic pad is cylindrical and the outer peripheral wall of the ceramic pad is toothed.

[0042] Preferably, the electrical device further includes: a first handle, the rear end of the spring guide tube being fixedly connected to the first handle; a second handle, the rear end of the sheath being fixedly connected to the second handle, wherein the first handle slides back and forth on the second handle and drives the spring guide tube to slide back and forth relative to the sheath; an outer sheath, sleeved over the sheath, with the O-blade and the I-blade passing through its front end; and a sleeve, fixed to the front end of the second handle, wherein the outer sheath slides backward to abut against the sleeve to expose the O-blade.

[0043] Preferably, the electrical device further includes: an electrode holder, which is connected to the second handle by snap-fit, interference fit, or threaded connection, and the spring guide tube is electrically connected to the connector on the electrode holder; and an injection port, which is fixed on the first handle, and the inner cavity of the spring guide tube communicates with the injection port.

[0044] Preferably, a radial electrode is fixed on the O-blade, and a ceramic head is also fixed to the front end of the O-blade.

[0045] Preferably, the spring guide tube moves back and forth, causing the I-blade to extend and retract from the front end of the outer sheath tube.

[0046] Preferably, the outer sheath tube has an outer sheath handle fixed to its rear end. The outer sheath handle is attached to the sheath tube, and the outer sheath handle moves backward, causing the outer sheath tube to move backward relative to the sheath tube.

[0047] Preferably, the first handle has a double-finger ring structure, and the second handle includes a handle body and a thumb ring fixed to the rear end of the handle body.

[0048] Preferably, the spring guide tube is covered with a plastic coating.

[0049] Preferably, the electrical device is used in conjunction with an endoscope.

[0050] In summary, the present invention has the following beneficial effects:

[0051] 1. The spring guide tube of this application serves as both a conduit and a conductor. During cutting, the spring guide tube, the connector on the electrode holder, and the I-blade connect to form an electrical circuit. During injection, the inner cavity of the spring guide tube and the injection port connect to the inner cavity of the I-blade to form an injection channel. Thus, on the one hand, the reverse movement of the corresponding driving components between the liquid injection and electric cutting functions can completely eliminate the accidental activation of the standby function, avoiding accidental injury to the patient or interference with the surgical process. On the other hand, it can reduce unnecessary movements during the doctor's operation and improve surgical efficiency. Secondly, it can also avoid the phenomenon of misoperation caused by the linkage of multiple functional components moving in the same direction.

[0052] 2. In this application, the I-blade penetrates the O-blade, and the O-blade is inserted at the front end of the sheath and fixedly connected to the sheath, which can reduce the radial dimension of the sheath.

[0053] 3. The internal structure of this high-frequency electrical device is simpler and the manufacturing cost is lower. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the present invention;

[0055] Figure 2 This is a sectional view of the head end of this high-frequency electrical device;

[0056] Figure 3 This is a schematic diagram of the I-blade or injection needle of the present invention in the working state;

[0057] Figure 4 This is a schematic diagram of the O-blade of the present invention in the working state.

[0058] Reference numerals: 1. Thumb ring; 2. Second handle; 3. First handle; 4. Injection port; 5. Electrode seat; 6. Connector; 7. Sleeve; 8. Sheath; 9. Outer sheath handle; 10. Outer sheath tube; 11. Ceramic head; 12. I-blade; 13. Radial electrode; 14. O-blade; 15. Ceramic pad; 16. Spring guide tube; 17. Plastic coating. Detailed Implementation

[0059] The invention will be further described with reference to the accompanying drawings.

[0060] This embodiment discloses a high-frequency electrical device used in conjunction with an endoscope, such as... Figures 1-4As shown, the device includes a sheath 8, an I-blade 12, an O-blade 14, a first handle 3, a second handle 2, an electrode base 5, and an injection interface 4. The electrode base 5 is equipped with a connector 6 and is located at the front end of the second handle 2, connected to it via a snap-fit, interference fit, or threaded connection. The injection interface 4 is fixed to the first handle 3. The rear end of the sheath 8 is fixedly connected to the second handle 2, and a spring guide tube 16 passes through the sheath 8. The spring guide tube 16 is also covered with a plastic coating. The first handle 3 is slidably mounted on the second handle 2. The rear end of the spring guide tube 16 is fixedly connected to the first handle 3. The first handle 3 slides back and forth on the second handle, causing the spring guide tube 16 to move back and forth relative to the sheath. Simultaneously, the spring guide tube 16 is connected to the electrode base 5 via a connector 6. The connector 6 is electrically connected, and the inner cavity of the spring guide tube 16 is connected to the injection port 4. An outer sheath tube 10 is also provided outside the sheath tube 8. The front part of the outer sheath tube 10 is provided with an O-blade 14 and an I-blade 12. The I-blade 12 passes through the O-blade 14. A ceramic pad 15 is also inserted and fixed to the front end of the sheath tube 8. The O-blade 14 is fixed to the front end of the sheath tube 8 through the ceramic pad 15. The ceramic pad 15 is cylindrical and the outer peripheral wall of the ceramic pad 15 is toothed. The rear end of the I-blade 12 is fixedly connected to the front end of the spring guide tube 16. A radial electrode 13 is also fixed on the O-blade 14. The outer sheath tube 10 can slide backward relative to the sheath tube 8 to expose the O-blade 14. At the same time, the I-blade 12 has an inner cavity and is connected to the inner cavity of the spring guide tube 16. The spring guide tube 16 moves back and forth and drives the I-blade 12 to extend and retract from the front end of the outer sheath tube 10.

[0061] Injection needle mode: Push the first handle 3 forward along the second handle 2. The first handle 3 drives the spring guide tube 16 and the I-blade 12 to move forward, so that the I-blade 12 extends from the front end of the outer sheath tube 10 to reach the working state. At this time, the injection port 4, the inner cavity of the spring guide tube 16 and the inner cavity of the I-blade 12 are connected to form a channel. Connect the syringe to the injection port 4 to perform the injection operation.

[0062] High-frequency I-blade mode: Push the first handle 3 forward along the second handle 2. The first handle 3 drives the spring guide tube 16 and the I-blade 12 to move forward, so that the I-blade 12 extends from the front end of the outer sheath tube 10 to reach the working state. At this time, the connector 6, the spring guide tube 16 and the I-blade 12 form a connection circuit, and the high-frequency electrical connection is made to the connector 6 to perform the I-blade 12 cutting operation.

[0063] High-frequency O-blade mode: With the I-blade 12 fully retracted, pull the outer sheath 10 backward along the sheath 8 so that the O-blade 14 protrudes from the front end of the outer sheath 10. At this time, the high-frequency O-blade 14 is in working state. At this time, the connector 6, spring guide tube 16, I-blade 12, radial electrode 13 and O-blade 14 form a connection circuit. Connect the high-frequency power to the connector 6 to perform the O-blade 14 cutting operation.

[0064] This instrument integrates the functions of the I-knife 12, O-knife 14, and injection needle, achieving a three-in-one operation. Doctors can perform corresponding operations as needed, such as marking diseased tissue, injecting saline to elevate the lesion, and cutting and peeling mucosal tissue. This saves time in changing instruments, improves surgical efficiency, and minimizes patient suffering.

[0065] In the technical solution of this application, the spring guide tube 16 serves as both a conduit and a conductor. During cutting, the spring guide tube 16, the connector 6 on the electrode seat 5, and the I-blade 12 connect to form an electrical circuit. During cutting, the inner cavity of the spring guide tube 16, the injection port 4, and the inner cavity of the I-blade 12 communicate to form an injection channel. Thus, on the one hand, the reverse movement of the corresponding driving components between the liquid injection and electro-cutting functions completely eliminates the accidental activation of the standby function, preventing accidental injury to the patient or interference with the surgical process. Simultaneously, it reduces unnecessary movements during the doctor's operation, improving surgical efficiency. Secondly, it avoids the occurrence of misoperation due to the coordinated movement of multiple functional components. On the other hand, it reduces the radial dimension of the sheath 8, and the internal structure of the instrument is simpler and the manufacturing cost is lower.

[0066] Furthermore, a sleeve 7 is fixed to the front end of the second handle 2, and the outer sheath 10 slides backward until it abuts against the sleeve 7 to expose the O-knife 14; at the same time, an outer sheath handle 9 is fixed to the rear end of the outer sheath 10, and the outer sheath handle 9 is sleeved on the sheath 8. The outer sheath handle 9 moves backward and drives the outer sheath 10 to move backward relative to the sheath 8.

[0067] The first handle 3 includes a handle body and a thumb ring 1 fixed to the rear end of the handle body; the second handle 2 has a double-finger ring structure, which facilitates one-handed operation by the doctor. At the same time, a ceramic head 11 is also fixed to the front end of the O-knife 14.

[0068] The specified directions in this specific embodiment are merely for the purpose of facilitating the description of the positional relationships and mutual cooperation between the components. The above description is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0069] This disclosure also includes, but is not limited to, the following technical solutions. Technical Solution 1. A high-frequency electrical device for use with an endoscope, comprising a sheath (8), an I-blade (12), an O-blade (14), and a first handle (3). The second handle (2), electrode holder (5), and injection port (4) are characterized by: The rear end of the sheath (8) is fixedly connected to the second handle (2), and a spring guide tube (16) is inserted inside the sheath (8); a first handle (3) is slidably mounted on the second handle (2), and the rear end of the spring guide tube (16) is fixedly connected to the first handle (3). The first handle (3) slides back and forth on the second handle (2) and drives the spring guide tube (16) to slide back and forth relative to the sheath (8); at the same time, the spring guide tube (16) is electrically connected to the connector (6) on the electrode seat (5), and the inner cavity of the spring guide tube (16) is connected to the injection port (4); An outer sheath (10) is also fitted over the sheath (8). The front part of the outer sheath (10) is through which the O-blade (14) and the I-blade (12) pass. The I-blade (12) passes through the O-blade (14), and the rear end of the I-blade (12) is fixedly connected to the front end of the spring guide tube (16). The O-blade (14) is fixed to the front end of the sheath (8), and a radial electrode (13) is also fixed on the O-blade (14). The outer sheath (10) can slide backward relative to the sheath (8) to expose the O-blade (14). The I-blade (12) has an inner cavity and is connected to the inner cavity of the spring guide tube (16); the spring guide tube (16) moves back and forth and drives the I-blade (12) to extend and retract from the front end of the outer sheath tube (10). Technical Solution 2. The high-frequency electrical device used in conjunction with an endoscope as described in Technical Solution 1 is characterized in that: the front end of the second handle (2) is also fixed with a sleeve (7). Technical Solution 3. The high-frequency electrical device used in conjunction with an endoscope according to Technical Solution 1 or 2 is characterized in that: an outer sheath handle (9) is fixed at the rear end of the outer sheath tube (10), the outer sheath handle (9) is sleeved on the sheath tube (8), and the outer sheath handle (9) moves backward and drives the outer sheath tube (10) to move backward relative to the sheath tube (8). Technical Solution 4. The high-frequency electrical device used in conjunction with an endoscope as described in Technical Solution 3 is characterized in that: the spring guide tube (16) is covered with a plastic coating layer. Technical Solution 5. The high-frequency electrical device used in conjunction with an endoscope according to Technical Solution 1 is characterized in that: the second handle (2) includes a handle body and a thumb ring (1) fixed to the rear end of the handle body; the first handle (3) is a double-finger ring structure. Technical Solution 6. The high-frequency electrical device used in conjunction with an endoscope as described in Technical Solution 1 is characterized in that: the front end of the O-knife (14) is further fixed with a ceramic head (11). Technical Solution 7. The high-frequency electrical device used in conjunction with an endoscope according to Technical Solution 1 is characterized in that: the injection port (4) is fixed on the first handle (3). Technical Solution 8. The high-frequency electrical device used in conjunction with an endoscope according to Technical Solution 1 is characterized in that: a ceramic pad (15) is also inserted and fixed at the front end of the sheath (8), and the O-knife (14) is fixed at the front end of the sheath (8) through the ceramic pad (15). Technical Solution 9. The high-frequency electrical device used in conjunction with an endoscope according to Technical Solution 8 is characterized in that: the ceramic pad (15) is cylindrical, and the outer peripheral wall of the ceramic pad (15) is toothed. Technical Solution 10. The high-frequency electrical device used in conjunction with an endoscope according to Technical Solution 1 is characterized in that: the electrode seat (5) and the second handle (2) are connected by snap-fit, interference fit or threaded connection.

Claims

1. An electrical appliance, comprising: Sheath (8), with a guide tube (16) inserted inside the sheath (8); O-blade (14), fixed to the front end of the sheath (8); A ceramic head (11) is fixed to the front end of the O-blade (14); A pad (15) is fixed to the front end of the sheath (8), and the O-blade (14) is fixed to the front end of the sheath (8) by the pad (15); and I-blade (12), penetrating the O-blade (14) and including a radially outwardly projecting distal head, The rear end of the I-blade (12) is fixedly connected to the front end of the guide tube (16), the I-blade (12) has an inner cavity that communicates with the inner cavity of the guide tube (16), and the liquid leaves the electrical device only through the I-blade (12).

2. The electrical device according to claim 1, wherein The guide tube (16) is a spring guide tube.

3. The electrical device according to claim 1 or 2, wherein The pad (15) is a ceramic pad (15), and The ceramic pad (15) is cylindrical, and the outer peripheral wall of the ceramic pad (15) is toothed.

4. The electrical appliance according to any one of claims 1 to 3, further comprising: The first handle (3) is fixedly connected to the rear end of the guide tube (16); The second handle (2) is fixedly connected to the rear end of the sheath (8), wherein the first handle (3) slides back and forth on the second handle (2) and drives the guide tube (16) to slide back and forth relative to the sheath (8); An outer sheath (10) is fitted over the sheath (8), and the O-blade (14) and the I-blade (12) pass through its front portion; and The sleeve (7) is fixed to the front end of the second handle (2). The outer sheath (10) slides backward until it abuts against the sleeve (7) to expose the O-knife (14).

5. The electrical appliance according to any one of claims 1 to 4, further comprising: The electrode holder (5) is connected to the second handle (2) via a snap-fit, interference fit, or threaded connection; the guide tube (16) is electrically connected to the connector (6) on the electrode holder (5); and The injection port (4) is fixed on the first handle (3), and the inner cavity of the guide tube (16) is connected to the injection port (4).

6. The electrical device according to any one of claims 1 to 5, wherein A radial electrode (13) is fixed on the O-blade (14).

7. The electrical device according to any one of claims 4 to 6, wherein The guide tube (16) moves back and forth, causing the I-blade (12) to extend and retract from the front end of the outer sheath tube (10).

8. The electrical appliance according to any one of claims 4 to 7, wherein The first handle (3) has a double-finger ring structure. The second handle (2) includes a handle body and a thumb ring (1) fixed to the rear end of the handle body, and The outer sheath tube (10) is fixed with an outer sheath handle (9) at its rear end. The outer sheath handle (9) is sleeved on the sheath tube (8). The outer sheath handle (9) moves backward and drives the outer sheath tube (10) to move backward relative to the sheath tube (8).

9. The electrical appliance according to any one of claims 1 to 8, wherein The guide tube (16) is covered with a plastic coating.

10. The electrical appliance according to any one of claims 1 to 9, wherein The electrical instruments are used in conjunction with an endoscope.

11. An electrical appliance, comprising: Sheath (8), with a spring guide tube (16) inserted inside the sheath (8); O-blade (14), fixed to the front end of the sheath (8); and I-blade (12) penetrates the O-blade (14). The rear end of the I-blade (12) is fixedly connected to the front end of the spring guide tube (16), and the I-blade (12) has an inner cavity that communicates with the inner cavity of the spring guide tube (16).

12. The electrical device according to claim 11, wherein A ceramic pad (15) is also fixed to the front end of the sheath (8), and the O-blade (14) is fixed to the front end of the sheath (8) through the ceramic pad (15). The ceramic pad (15) is cylindrical, and the outer peripheral wall of the ceramic pad (15) is toothed.

13. The electrical appliance according to claim 11 or 12, further comprising: The rear end of the spring guide tube (16) is fixedly connected to the first handle (3); The second handle (2) is fixedly connected to the rear end of the sheath (8), wherein the first handle (3) slides back and forth on the second handle (2) and drives the spring guide tube (16) to slide back and forth relative to the sheath (8); An outer sheath (10) is fitted over the sheath (8), and the O-blade (14) and the I-blade (12) pass through its front portion; and The sleeve (7) is fixed to the front end of the second handle (2). The outer sheath (10) slides backward until it abuts against the sleeve (7) to expose the O-knife (14).

14. The electrical appliance according to any one of claims 11 to 13, further comprising: The electrode holder (5) is connected to the second handle (2) via a snap-fit, interference fit, or threaded connection; the spring guide tube (16) is electrically connected to the connector (6) on the electrode holder (5); and The injection port (4) is fixed on the first handle (3), and the inner cavity of the spring guide tube (16) is connected to the injection port (4).

15. The electrical appliance according to any one of claims 11 to 14, wherein A radial electrode (13) is fixed on the O-blade (14), and The front end of the O-blade (14) is also fixed with a ceramic head (11).

16. The electrical appliance according to any one of claims 13 to 15, wherein The spring guide tube (16) moves back and forth, causing the I-blade (12) to extend and retract from the front end of the outer sheath tube (10).

17. The electrical appliance according to any one of claims 13 to 16, wherein The outer sheath tube (10) is fixed with an outer sheath handle (9) at its rear end. The outer sheath handle (9) is sleeved on the sheath tube (8). The outer sheath handle (9) moves backward and drives the outer sheath tube (10) to move backward relative to the sheath tube (8).

18. The electrical appliance according to any one of claims 13 to 17, wherein The first handle (3) has a double-finger ring structure, and The second handle (2) includes a handle body and a thumb ring (1) fixed to the rear end of the handle body.

19. The electrical appliance according to any one of claims 11 to 18, wherein The spring guide tube (16) is covered with a plastic coating.

20. The electrical appliance according to any one of claims 11 to 19, wherein The electrical instruments are used in conjunction with an endoscope.

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