A single-channel high-frequency electrosurgical unit

Abstract

The present invention provides a single-channel high-frequency electrosurgery, belonging to the technical field of medical devices. It solves the problem that the liquid circulation pipeline of the existing high-frequency electrosurgery is small in diameter, requires an additional pressure pump, and is expensive. The present invention comprises an operating part, a main body, and an operating part connected in sequence. The operating part comprises an electrosurgery and an infusion channel arranged outside the electrosurgery. The electrosurgery can reciprocate along the length of the infusion channel. The infusion channel is used to transport physiological saline to the head of the electrosurgery. The head of the electrosurgery is provided with an opening for spraying physiological saline. A coagulation coil is also provided on the outside of the infusion channel. The main body is provided with an infusion port and a power port. The power port is used to supply power to the electrosurgery and the coagulation coil. The operating part comprises an operating slider, a core rod, and a gripping body. The two ends of the core rod are respectively connected to the operating slider and the electrosurgery. The present invention has the advantages of greatly reducing the pressure requirement for infusion, and is simple to operate, reducing wound bleeding, and facilitating rapid recovery of the patient.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a single-channel high-frequency electric knife. Background Art

[0002] Endoscopic submucosal dissection (ESD) is a minimally invasive endoscopic technique that uses high-frequency instruments to perform submucosal dissection on lesions larger than 2 cm. Compared to traditional surgical procedures, ESD not only cures tumors but also better preserves digestive tract physiological functions, significantly improving patients' postoperative quality of life. It has become the preferred treatment for early-stage digestive tract cancer and precancerous lesions, including those of the esophagus. ESD utilizes an external device to output a high-frequency current, which forms a circuit through the human body and generates a high-density current in the smaller cross-sectional area of ​​the blade to achieve cutting.

[0003] Chinese Patent Publication No. CN208808644U discloses a dual-electrode high-frequency electrosurgical unit with dual-channel fluid injection, comprising an electrode unit, a main unit, and an operating unit. The electrode unit comprises an active electrode, an insulating filling layer, and an inert electrode. The active electrode has a hollow tubular portion that, when powered, can cut the target lesion. The main unit comprises a protective tube, an insulating outer tube, a spiral member coated with an insulating coating, connectors, and a seal. The spiral member coated with an insulating coating comprises a conductive spiral member and an insulating coating covering the spiral member. The operating unit comprises a positioning structure, a slider, a core rod, a connecting sheath, an infusion tube, and a connecting cable. The positioning structure and infusion tube are both connected to a 6% Luer connector. Physiological saline can flow from the hollow tubular portion of the active electrode for submucosal injection to lift mucosal tissue and clean bleeding sites. Physiological saline can also pass through the gap between the active electrode and the insulating filling layer to cleanse tissue adhering to the active electrode and the insulator and to clean bleeding sites. However, in this structure, due to the small diameter of the physiological saline flow pipe, a higher pressure is required at the infusion end to input the physiological saline, and therefore an additional pressure pump is required to achieve this function. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to provide a single-channel high-frequency electrosurgical unit that has low requirements on physiological saline pressure, does not require a pressure pump, and is easy to operate.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a single-channel high-frequency electric knife, comprising an operating part, a main body and an operating part connected in sequence, characterized in that the operating part comprises a hollow electric knife and an insulating sheath arranged outside the electric knife, the electric knife can reciprocate along the length direction of the insulating sheath, and the side of the insulating sheath close to the main body is also provided with an infusion channel connected to the main body and the electric knife, the head of the electric knife is provided with an opening for spraying physiological saline, the outside of the insulating sheath is also provided with a coagulation coil, the main body is provided with an infusion port for inputting physiological saline into the insulating sheath and a power port for supplying power to the electric knife and the coagulation coil, the operating part comprises an operating slider, a core rod and a holding body, the two ends of the core rod are respectively connected to the operating slider and the electric knife, the operating slider drives the core rod to reciprocate along the length direction of the holding body to control the movement of the electric knife and the power-on state of the electric knife and the coagulation coil.

[0006] The working principle of the present invention is as follows: the power-on states of the electric knife and the coagulation coil are divided into two gears. When the electric knife extends out of the insulating sheath, it is in the cutting state and the electric knife is powered at this time; when the electric knife is completely retracted into the insulating sheath, the coagulation coil is powered and it is in the coagulation state. When removing a tumor, first attach the inert electrode to the patient, and by moving the operating slider, the electric knife is powered on and put into the cutting state to remove the tumor. By moving the operating slider, the electric knife is switched to the coagulation state to heat the wound and coagulate, and can quickly stop bleeding in areas with large areas of bleeding. The physiological saline in the insulating sheath is sprayed from the head of the electric knife to clean the bleeding area. With the above-mentioned structural setting, the flow rate of the insulating sheath input end is greatly improved compared to the original small pipe input end that is entirely set inside the electric knife, and the pressure requirement for the infusion end is greatly reduced. It also has the advantages of reducing costs, simple operation, reducing wound bleeding, and facilitating rapid recovery of patients.

[0007] In the above-mentioned single-channel high-frequency electric knife, the electric knife is provided with a funnel-shaped protrusion at the end away from the main body, and the protrusion can be extended or retracted into the insulating sheath along with the electric knife.

[0008] In the above-mentioned single-channel high-frequency electric knife, the electric knife is connected to the core rod via a conductive spiral connector.

[0009] In the above-mentioned single-channel high-frequency electric knife, the gripping body is provided with two contacts in sequence, namely a cutting contact and a coagulation contact, and the operating slider is provided with a power-on contact.

[0010] In the above-mentioned single-channel high-frequency electric knife, the holding body is provided with a mounting slide, which divides the holding body into two arc-shaped slides on the left and right. The operating slider is provided with a mounting hole that matches the shape of the slide. The slide is inserted into the mounting hole to realize the sliding connection between the operating slider and the holding body.

[0011] In the above-mentioned single-channel high-frequency electric knife, the main body also includes an outer insulating sleeve for connecting to the insulating sheath, the electric knife and the infusion channel are arranged in the outer insulating sleeve, the infusion channel wraps the electric knife in the middle, and the electric knife can reciprocate along the length direction of the infusion channel in the infusion channel.

[0012] In the above-mentioned single-channel high-frequency electric knife, a connecting tube which is connected to the infusion channel and can move with the electric knife is provided on the section of the electric knife wrapped by the infusion channel.

[0013] In the above-mentioned single-channel high-frequency electric knife, the surfaces of the electric knife and the insulating sheath are both covered with an anti-adhesion coating.

[0014] Compared with the existing technology, the beneficial effects of the present invention are as follows: compared with the original dual-channel design, the present invention becomes a single-channel design, the insulating sheath wraps the electric knife, and the flow rate in the insulating sheath and the electric knife is greatly improved compared with the flow rate in the original two small pipes, and the pressure requirement for infusion is greatly reduced. It also has the advantages of simple operation, reduced wound bleeding, and conducive to the rapid recovery of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 yes Figure 1 A partial enlarged view of the electrosurgical unit structure;

[0017] Figure 3 It is a structural diagram of the operating slider;

[0018] Figure 4 1. It is a schematic diagram of the structure of the operating unit;

[0019] Figure 5 It is a schematic cross-sectional view of the main body.

[0020] In the figure, 1. surgical part; 2. main body; 3. operating part; 4. electric knife; 5. insulating sheath; 6. coagulation coil; 7. infusion port; 8. power port; 9. operating slider; 10. core rod; 11. grip body; 12. protrusion; 13. infusion channel; 14. spiral connector; 15. cutting contact; 16. coagulation contact; 17. power contact; 18. installation slide; 19. slide; 20. outer insulating sleeve. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0022] The purpose of the present invention can be achieved through the following technical solutions:

[0023] like Figure 1-5 As shown, the single-channel high-frequency electric knife includes an operating part 1, a main body 2 and an operating part 3 connected in sequence. The operating part 1 includes a hollow electric knife 4 and an insulating sheath 5 arranged outside the electric knife 4. The electric knife 4 can reciprocate along the length direction of the insulating sheath 5. The side of the insulating sheath 5 close to the main body 2 is also provided with an infusion channel 13 connected to the main body 2 and the electric knife 4. The head of the electric knife 4 is provided with an opening for spraying physiological saline. The outside of the insulating sheath 5 is also provided with a coagulation coil 6. The main body 2 is provided with an infusion port 7 for inputting physiological saline into the insulating sheath 5 and a power port 8 for supplying power to the electric knife 4 and the coagulation coil 6. The operating part 3 includes an operating slider 9, a core rod 10 and a holding body 11. The two ends of the core rod 10 are respectively connected to the operating slider 9 and the electric knife 4. The operating slider 9 drives the core rod 10 to reciprocate along the length direction of the holding body 11, thereby controlling the movement of the electric knife 4 and the power-on state of the electric knife 4 and the coagulation coil 6. The electrosurgical unit 4 is an active electrode. By attaching an inert electrode to the patient, current flows through the active lead and active electrode, passing through the patient. The current then returns to the generator of the electrosurgical unit 4 via the patient plate (i.e., the inert electrode and its lead). When the high-frequency, high-voltage current generated by the electrosurgical unit 4 passes through high-impedance tissue, it generates heat, causing tissue vaporization or coagulation. During electrosurgery, the resistance ranges from 100 to 2000 ohms. As tissue coagulates, the water in the cells vaporizes, drying the tissue, causing resistance to increase and ultimately stopping the current flow.

[0024] Compared with the channel arranged in the center of the small electric knife 4, the flow rate of the insulating sheath 5 is much larger, so the pressure requirement for infusion is greatly reduced.

[0025] Specifically, the electrosurgical unit 4 is provided with a funnel-shaped protrusion 12 at the end away from the main body 2. This protrusion 12 can extend or retract with the electrosurgical unit 4 into the insulating sheath 5. This structural arrangement significantly increases the unit flow rate of saline solution within the electrosurgical unit 4 compared to the original thin pipe, and significantly reduces the pressure required at the infusion port 7. The insulating filling layer 13 effectively fills the gap between the protrusion 12 of the electrosurgical unit 4 and the insulating sheath 5.

[0026] Specifically, the electric knife 4 is connected to the core rod 10 via a conductive spiral connector 14. The conductive spiral connector 14 is elastic and torsional, and is also covered with an insulating coating. This arrangement ensures that the spiral connector 14 is flexible, easy to bend, has low resistance, and delivers excellent cutting performance.

[0027] To elaborate further, the grip body 11 is provided with two contacts, namely a cutting contact 15 and a coagulation contact 16, and the operating slider 9 is provided with a power contact 17. The cutting contact 15 is closest to the main body 2, followed by the coagulation contact 16. The cutting contact 15 corresponds to the state when the protrusion 12 of the electrosurgical knife 4 is completely extended outside the insulating filling layer 13; the coagulation contact 16 corresponds to the state when the protrusion 12 of the electrosurgical knife 4 is completely extended into the insulating filling layer 13. At this time, the coagulation coil 6 is energized. The area of ​​the coagulation coil 6 is much larger than the area of ​​the protrusion 12 of the electrosurgical knife 4, so large-scale coagulation and rapid hemostasis can be performed. The two contacts are switched by moving the operating slider 9. When the power contact 17 contacts the cutting contact 15 or the coagulation contact 16, power is supplied, thereby energizing the electrosurgical knife 4 or the coagulation coil 6.

[0028] In further detail, the grip body 11 is provided with a mounting slide 18, which divides the grip body 11 into two arc-shaped slides 19 on the left and right. The operating slider 9 is provided with a mounting hole that matches the shape of the slide 19. The slide 19 is inserted into the mounting hole to achieve a sliding connection between the operating slider 9 and the grip body 11, making operation convenient.

[0029] In further detail, the main body 2 also includes an outer insulating sleeve 20 for connecting to the insulating sheath 5. The electric knife 4 and the infusion channel 13 are arranged in the outer insulating sleeve 20. The infusion channel 13 wraps the electric knife 4 in the middle. The electric knife 4 can reciprocate along the length direction of the infusion channel 13 in the infusion channel 13.

[0030] To be more specific, the section of the electrosurgery 4 wrapped by the infusion channel 13 is provided with a connecting tube that is connected to the infusion channel 13 and can move with the electrosurgery 4. Other connecting methods are also possible.

[0031] In further detail, the surfaces of the electrosurgical unit 4 and the insulating sheath 5 are both coated with an anti-adhesion coating to prevent tissue adhesion. The coating may be made of materials including, but not limited to, titanium nitride (TiN), chromium nitride (CrN), titanium aluminum carbon nitride (TiAlCN), titanium aluminum nitride (TiAlN), diamond-like carbon (DLC), polytetrafluoroethylene (PTFE), and the like.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0033] Although this document frequently uses terms such as surgical portion 1, main body 2, operating portion 3, electrosurgical unit 4, insulating sheath 5, coagulation coil 6, infusion port 7, power supply port 8, operating slider 9, core rod 10, grip body 11, protrusion 12, infusion channel 13, spiral connector 14, cutting contact 15, coagulation contact 16, power supply contact 17, mounting slide 18, slide 19, and outer insulating sleeve 20, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations would be contrary to the spirit of the present invention.

Claims

1. A single-channel high-frequency electric knife, comprising a surgical section (1), a main body (2) and an operating section (3) connected in sequence, characterized in that: The surgical section (1) comprises a hollow electric knife (4) and an insulating sheath (5) arranged outside the electric knife (4). The electric knife (4) can make reciprocating motion along the length direction of the insulating sheath (5). The insulating sheath (5) is provided with an infusion channel (13) connected to the main body (2) and the electric knife (4). The head of the electric knife (4) is provided with an opening for spraying physiological saline. The insulating sheath (5) is also provided with a coagulation ring (6). The main body (2) is provided with an infusion channel (13) connected to the main body (2). The edge sheath (5) is provided with an infusion port (7) for inputting physiological saline and a power port (8) for supplying power to the electric knife (4) and the coagulation coil (6); the operating portion (3) comprises an operating slider (9), a core rod (10) and a holding body (11); the two ends of the core rod (10) are respectively connected to the operating slider (9) and the electric knife (4); the operating slider (9) drives the core rod (10) to perform reciprocating motion along the length direction of the holding body (11) to control the movement of the electric knife (4) and the power supply state of the electric knife (4) and the coagulation coil (6); The electric knife (4) is provided with a funnel-shaped protrusion (12) at the end away from the main body (2), and the protrusion (12) can be extended or retracted into the insulating sheath (5) along with the electric knife (4); The electric knife (4) is connected to the core rod (10) via a conductive spiral connector (14); The gripping body (11) is provided with a mounting slideway (18), and the mounting slideway (18) divides the gripping body (11) into two arc-shaped slides (19) on the left and right. The operating slider (9) is provided with a mounting hole that matches the shape of the slide (19). The slide (19) is inserted into the mounting hole to realize the sliding connection between the operating slider (9) and the gripping body (11); The main body (2) further comprises an outer insulating sleeve (20) for connecting to the insulating sheath (5); the electric knife (4) and the infusion channel (13) are arranged in the outer insulating sleeve (20); the infusion channel (13) wraps the electric knife (4) in the middle; the electric knife (4) can perform reciprocating motion in the infusion channel (13) along the length direction of the infusion channel (13); The section of the electric knife (4) wrapped by the infusion channel (13) is provided with a connecting tube that is connected to the infusion channel (13) and can move telescopically with the electric knife (4).

2. A single-channel high-frequency electrosurgical unit according to claim 1, characterized in that: The gripping body (11) is provided with two contacts in sequence, namely a cutting contact (15) and a coagulation contact (16), and the operating slider (9) is provided with a corresponding power-on contact (17).

3. The single-channel high-frequency electrosurgical unit according to claim 1, characterized in that: The surfaces of the electric knife (4) and the insulating sheath (5) are both covered with an anti-adhesion coating.

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