A high-frequency electric knife with coagulation and cutting functions

Abstract

The present invention belongs to the technical field of medical devices and provides a high-frequency electric knife with coagulation and cutting functions. The proximal end of an insulating sheath is mounted on a handle. A first needle electrode and a coagulation electrode are both tubular, and a second needle electrode is solid cylindrical. The first needle electrode, the second needle electrode, and the coagulation electrode are coaxially arranged. The proximal end of the coagulation electrode is inserted into and fixedly connected to the distal end of the insulating sheath, and the distal end of the coagulation electrode extends out of the insulating sheath. The first needle electrode is inserted into the coagulation electrode and fits in the gap between the coagulation electrodes. The second needle electrode is inserted into the first needle electrode and fits in the gap between the first needle electrode. The distal end of a first connector that can be driven to move linearly in a distal-proximal direction is inserted into the insulating sheath and fixedly connected to the first needle electrode. The distal end of a second connector that can be driven to move linearly in a distal-proximal direction is inserted into the insulating sheath and fixedly connected to the second needle electrode. The high-frequency electric knife can switch between different electrodes as needed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a high-frequency electric knife with coagulation and cutting functions. Background Art

[0002] A high-frequency electrosurgical unit is an electrosurgical device that replaces mechanical scalpels for tissue cutting. It uses high-frequency, high-voltage current generated by the active electrode tip to heat tissue upon contact, separating and coagulating it, thereby achieving both cutting and hemostasis. A high-frequency electrosurgical unit requires a matching neutral plate. When attached to a muscle-rich area of ​​the patient, the neutral plate directs the current trapped in the body back to the electrosurgical unit and other instruments, forming a complete high-frequency circuit. This disperses the current during high-frequency surgery, reducing the risk of current concentration and safely collecting and transferring the current outside the body, protecting the patient.

[0003] During tissue manipulation with high-frequency electrosurgical units, large-caliber needle electrodes are generally used to treat dense connective tissue with a collagen content greater than 60%, such as fascia and scars, while small-caliber needle electrodes are used to treat areas dominated by elastic fibers, such as the vascular adventitia and nerve sheaths. In complex surgeries, large-caliber and small-caliber needle electrodes are often used in combination. The diameter of the large-caliber electrode ranges from 1.5 to 2.5 mm, while the diameter of the small-caliber electrode ranges from 0.3 to 0.8 mm. Furthermore, needle electrodes are associated with a high bleeding rate during use. When bleeding occurs, a dedicated coagulation electrode must be quickly replaced. A flushing pump is used to flush away the clot, exposing the bleeding point, where the coagulation electrode is applied to achieve hemostasis. Currently, each electrosurgical unit is typically equipped with a fixed electrode, requiring the use of multiple electrosurgical units with different electrodes during a single surgery. This large number of electrosurgical units requires frequent instrument replacement, complicating the procedure and prolonging the surgical time. Furthermore, the high number of electrosurgical units can lead to high surgical costs for the patient.

[0004] Therefore, there is an urgent need to provide a high-frequency electric knife that can switch between different electrodes. Summary of the Invention

[0005] (1) Technical issues to be resolved

[0006] In view of the problems existing in the above technologies, the present invention aims to solve them at least to a certain extent. To this end, the present invention aims to provide a high-frequency electric knife with coagulation and cutting functions, which can switch between different electrodes.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] The present invention provides a high-frequency electric knife with coagulation and cutting functions, comprising an insulating sheath, a first needle-shaped electrode, a second needle-shaped electrode, a coagulation electrode, a first connecting piece, a second connecting piece and a handle; the proximal end of the insulating sheath is mounted on the handle, the first needle-shaped electrode and the coagulation electrode are both tubular, the second needle-shaped electrode is solid cylindrical, the first needle-shaped electrode, the second needle-shaped electrode and the coagulation electrode are coaxially arranged, the proximal end of the coagulation electrode is inserted into the distal end of the insulating sheath and fixedly connected to the insulating sheath, the distal end of the coagulation electrode extends out of the insulating sheath, the first needle-shaped electrode is inserted into the coagulation electrode and is gap-matched with the coagulation electrode, the second needle-shaped electrode is inserted into the first needle electrode The distal end of the first connector is inserted into the insulating sheath and fixedly connected to the first needle electrode, the proximal end of the first connector is inserted into the handle and can be driven to make linear motion along the distal and proximal directions, the distal end of the second connector is inserted into the insulating sheath and fixedly connected to the second needle electrode, the proximal end of the second connector is inserted into the handle and can be driven to make linear motion along the distal and proximal directions; when the first connector and the second connector are both in the coagulation position, the distal end face of the first needle electrode is aligned with the distal end face of the coagulation electrode and the transition is smooth, and the distal end face of the second needle electrode is aligned with the distal end face of the first needle electrode and the transition is smooth.

[0010] Optionally, the first connecting member can move between an electrocoagulation position and an electrocuting position arranged in sequence from near to far, the first connecting member is located at the electrocuting position, and the distal end of the first needle-shaped electrode extends out of the coagulation electrode; the second connecting member can move between an electrocoagulation position and an electrocuting position arranged in sequence from near to far, the second connecting member is located at the electrocuting position, and the distal end of the second needle-shaped electrode extends out of the coagulation electrode.

[0011] Optionally, the first connecting member and the second connecting member are both located at the coagulation position, and the distal end surface of the coagulation electrode, the distal end surface of the first needle electrode, and the distal end surface of the second needle electrode are all spherical cap-shaped.

[0012] Optionally, a transfer chamber is installed in the handle, the inlet of the transfer chamber is connected to the liquid outlet of the water pump, the first connecting member is tubular, the first connecting member is connected to the transfer chamber, the second connecting member is located in the tube of the first connecting member, and the first connecting member is always connected to the transfer chamber during the movement of the first connecting member; the second connecting member can move between the first water supply position, the electrocoagulation position and the electrocuting position arranged in sequence from near to far, and when the first connecting member is in the electrocoagulation position and the second connecting member is in the first water supply position, the second needle electrode is pulled out of the first needle electrode and is located on the proximal side of the first needle electrode.

[0013] Optionally, the second connecting member can move between the first water supply position, the second water supply position, the electrocoagulation position and the electrocuting position, which are arranged in sequence from near to far. When the first connecting member is at the electrocuting position and the second connecting member is at the second water supply position, the second needle electrode is pulled out of the first needle electrode and is located proximal to the first needle electrode.

[0014] Optionally, a support member is fixedly installed in the tube of the first connecting member, a first through hole is opened on the support member, and the second connecting member is arranged to pass through the first through hole and is gap-fitted with the first through hole; a channel for water flow is formed between the support member and the tube wall of the first connecting member, or a second through hole for water flow is opened on the support member.

[0015] Optionally, the high-frequency electric knife with coagulation and cutting functions also includes a first transmission member and a second transmission member; the first connecting member is fixedly connected to the transfer chamber, the second connecting member passes through the transfer chamber and is slidably connected to the transfer chamber, the first transmission member is connected to the transfer chamber or the first connecting member, and the second transmission member is connected to the part of the second connecting member extending out of the transfer chamber. The first transmission member drives the first connecting member and the transfer chamber to move, and the second transmission member drives the second connecting member to move. During the movement of the transfer chamber, the inlet of the transfer chamber is always connected to the liquid outlet of the water pump.

[0016] Optionally, the transfer chamber has a sleeve portion extending in the distal direction, the sleeve portion is arranged to pass through the proximal end of the handle shell, and the second connecting member is inserted into the sleeve portion and extends the sleeve portion proximally; a first transmission member is provided on the portion where the sleeve portion extends out of the handle shell, and a second transmission member is provided on the portion where the second connecting member extends out of the sleeve portion.

[0017] Optionally, the high-frequency electric knife with coagulation and cutting functions also includes a first transmission member and a second transmission member; the first connecting member is slidably connected and communicated with the transfer chamber, the second connecting member passes through the transfer chamber and is slidably connected with the transfer chamber, the first transmission member is connected to the first connecting member, and the second transmission member is connected to the part of the second connecting member extending out of the transfer chamber, the first transmission member drives the first connecting member to move, and the second transmission member drives the second connecting member to move; or, the first connecting member is slidably connected and communicated with the transfer chamber, the second connecting member is fixedly connected to the transfer chamber, the first transmission member is connected to the first connecting member, the second transmission member is connected to the transfer chamber, the first transmission member drives the first connecting member to move, the second transmission member drives the transfer chamber and the second connecting member to move, and during the movement of the transfer chamber, the inlet of the transfer chamber is always connected to the liquid outlet of the water pump.

[0018] Optionally, the first connecting member is made of metal, and the proximal end of the first connecting member is used to be electrically connected to the power supply, and / or the second connecting member is made of metal, and the proximal end of the second connecting member is used to be electrically connected to the power supply; or, the first connecting member includes a first supporting body and a first conductive wire buried in the first supporting body, the first end of the first conductive wire is electrically connected to the first needle-shaped electrode, and the second end of the first conductive wire is located at the proximal end of the first connecting member for electrically connecting to the power supply, and / or, the second connecting member includes a second supporting body and a second conductive wire buried in the second supporting body, the first end of the second conductive wire is electrically connected to the second needle-shaped electrode, and the second end of the second conductive wire is located at the proximal end of the second connecting member for electrically connecting to the power supply.

[0019] (3) Beneficial effects

[0020] The beneficial effects of the present invention are:

[0021] The high-frequency electric knife with coagulation and cutting functions provided by the present invention can realize the switching of the coagulation electrode, the first needle-shaped electrode, and the second needle-shaped electrode on a high-frequency electric knife, so as to be used for the coagulation working mode, the large-caliber electrode electrocuting working mode, and the small-caliber electrode electrocuting working mode of the high-frequency electric knife, respectively. This reduces the number of electric knives used in a surgery, shortens the operation time, and reduces the cost pressure on the patient. In addition, in the high-frequency electric knife provided by the present invention, by coaxially arranging the first needle-shaped electrode, the second needle-shaped electrode, and the coagulation electrode, the second needle-shaped electrode is inserted into the first needle-shaped electrode, and the first needle-shaped electrode is inserted into the coagulation electrode, the structure is more compact, and the distal end faces of the first needle-shaped electrode and the distal end faces of the second needle-shaped electrode are used as the coagulation contact surface to fill the hole on the distal end face of the coagulation electrode, which is conducive to designing a larger area of ​​the coagulation contact surface and improving the effectiveness of the coagulation. In addition, the tubular first needle-shaped electrode provides a structural basis for the subsequent realization of the water spray function of the electric knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is described with the aid of the following drawings:

[0023] Figure 1 is a schematic structural diagram of a high-frequency electrosurgical unit according to Example 1;

[0024] Figure 2 1 is a schematic diagram of the distal structure of a high-frequency electrosurgical unit in electrocoagulation mode according to Example 1;

[0025] Figure 3 1 is a schematic diagram of the distal structure of a high-frequency electrosurgical unit in a large-caliber electrode electrosurgical cutting working mode according to Example 1;

[0026] Figure 4 1 is a schematic diagram of the distal structure of a high-frequency electrosurgical unit in a small-caliber electrode electrosurgical cutting mode according to Example 1;

[0027] Figure 5 is a schematic cross-sectional view of a high-frequency electrosurgical unit in electrocoagulation mode according to Example 1;

[0028] Figure 6 yes Figure 5 A magnified schematic diagram of point A in the middle;

[0029] Figure 7 yes Figure 5 A magnified schematic diagram of point B in the middle;

[0030] Figure 8 is a schematic cross-sectional view of a high-frequency electrosurgical unit in a water injection working mode according to Example 1;

[0031] Figure 9 yes Figure 8 A magnified schematic diagram of point A in the middle;

[0032] Figure 10 yes Figure 8 Enlarged schematic diagram of point B in the middle.

[0033] [Description of Reference Numerals]

[0034] 11: Insulating sheath; 12: First needle electrode; 13: Second needle electrode; 14: Coagulation electrode; 15: First connecting piece; 16: Second connecting piece; 17: Ceramic sleeve;

[0035] 21: Transfer room; 22: Water pump; 23: Installation room; 24: First sealing ring; 25: Second sealing ring; 26: Third sealing ring; 27: Infusion port;

[0036] 211: casing;

[0037] 3: first transmission member;

[0038] 4: The second transmission member. DETAILED DESCRIPTION

[0039] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. The "near" mentioned herein refers to the side close to the operator, and the "far" refers to the side close to the patient. The directional terms "upper", "lower", "front", "back", "left", "right" and so on mentioned herein are in the order of Figure 1 The orientation is used as a reference, where the direction from near to far is also the direction from back to front.

[0040] Example 1

[0041] like Figures 1 to 10 As shown, this embodiment provides a high-frequency electric knife with coagulation and cutting functions. The high-frequency electric knife includes a handle and a shaft assembly connected in sequence from proximal to distal.

[0042] The shaft assembly includes an insulating sheath 11, a first needle-shaped electrode 12, a second needle-shaped electrode 13, a coagulation electrode 14, a first connector 15, and a second connector 16. The proximal end of the insulating sheath 11 is connected to the handle. The first needle-shaped electrode 12 and the coagulation electrode 14 are both tubular, and the second needle-shaped electrode 13 is a solid column. The first needle-shaped electrode 12, the second needle-shaped electrode 13, and the coagulation electrode 14 are coaxially arranged. The proximal end of the coagulation electrode 14 is inserted into the distal end of the insulating sheath 11 and fixedly connected to the insulating sheath 11. The distal end of the coagulation electrode 14 extends out of the insulating sheath 11. The first needle-shaped electrode 12 is inserted into the coagulation electrode 14, and the first needle-shaped electrode 12 and the coagulation electrode 14 are loosely matched. The second needle-shaped electrode 13 is inserted into the first needle-shaped electrode 12, and the second needle-shaped electrode 13 and the first needle-shaped electrode 12 are loosely matched.

[0043] The distal end of the first connecting member 15 is inserted into the insulating sheath 11 and fixedly connected to the first needle-shaped electrode 12, the proximal end of the first connecting member 15 is inserted into the handle, and the proximal end of the first connecting member 15 can be driven to make linear motion along the distal and proximal directions, the distal end of the second connecting member 16 is inserted into the insulating sheath 11 and fixedly connected to the second needle-shaped electrode 13, the proximal end of the second connecting member 16 is inserted into the handle, and the proximal end of the second connecting member 16 can be driven to make linear motion along the distal and proximal directions.

[0044] The first connecting member 15 can move between the coagulation position and the electrocuting position, which are arranged in sequence from near to far, and the second connecting member 16 can move between the coagulation position and the electrocuting position, which are arranged in sequence from near to far. When the first connecting member 15 and the second connecting member 16 are both in the coagulation position, the distal end face of the first needle-shaped electrode 12 is aligned with the distal end face of the coagulation electrode 14 and the transition is smooth, and the distal end face of the second needle-shaped electrode 13 is aligned with the distal end face of the first needle-shaped electrode 12 and the transition is smooth. When the first connecting member 15 is in the electrocuting position, the distal end of the first needle-shaped electrode 12 extends out of the coagulation electrode 14, which is used for the high-frequency electric knife to perform electrocuting operations with large-caliber electrodes. When the second connecting member 16 is in the electrocuting position, the distal end of the second needle-shaped electrode 13 extends out of the coagulation electrode 14, which is used for the high-frequency electric knife to perform electrocuting operations with small-caliber electrodes.

[0045] With the high-frequency electric knife configured in this manner, when the high-frequency electric knife is in the electric coagulation working mode, the first connecting member 15 and the second connecting member 16 are both located in the electric coagulation position, and the distal end face of the electric coagulation electrode 14, the distal end face of the first needle-shaped electrode 12, and the distal end face of the second needle-shaped electrode 13 jointly form an electric coagulation contact surface, which can effectively coagulate and stop bleeding at the bleeding point; when the high-frequency electric knife is in the large-caliber electrode electric cutting working mode, the first connecting member 15 is located in the electric cutting position, the second connecting member 16 is located in the electric coagulation position, and the first needle-shaped electrode 12 extending from the electric coagulation electrode 14 can perform electric cutting operations on tissue; when the high-frequency electric knife is in the small-caliber electrode electric cutting working mode, the second connecting member 16 is located in the electric cutting position, the first connecting member 15 is located in the electric coagulation position, and the second needle-shaped electrode 13 extending from the coagulation electrode 14 can perform electric cutting operations on tissue. Thus, the high-frequency electrosurgery provided in this embodiment can realize the switching of the coagulation electrode 14, the first needle-shaped electrode 12, and the second needle-shaped electrode 13 on a single high-frequency electrosurgery, so as to be used in the electrocoagulation working mode, the large-caliber electrode electrocuting working mode, and the small-caliber electrode electrocuting working mode of the high-frequency electrosurgery, thereby reducing the number of electrosurgeries used in a single operation, shortening the operation time while reducing the cost burden on the patient. Furthermore, in the high-frequency electrosurgery provided in this embodiment, by coaxially arranging the first needle-shaped electrode 12, the second needle-shaped electrode 13, and the coagulation electrode 14, and inserting the second needle-shaped electrode 13 into the first needle-shaped electrode 12, and the first needle-shaped electrode 12 into the coagulation electrode 14, the structure is more compact, and the distal end surfaces of the first needle-shaped electrode 12 and the distal end surfaces of the second needle-shaped electrode 13 are used as electrocoagulation contact surfaces to fill the void on the distal end surface of the coagulation electrode 14, which is conducive to designing a larger area of ​​electrocoagulation contact surface and improving the effectiveness of electrocoagulation. Moreover, the tubular first needle-shaped electrode 12 provides a structural foundation for the subsequent realization of the electrosurgery water spray function.

[0046] Specifically, in this embodiment, the coagulation electrode 14 comprises an insertion portion and a coagulation portion, connected in sequence from proximal to distal. The insertion portion is inserted into the distal end of the insulating sheath 11, while the coagulation portion extends outward from the insulating sheath 11. The insertion portion and the coagulation portion are coaxially arranged, and the radial dimension of the coagulation portion is larger than that of the insertion portion. This facilitates a larger area on the distal end face of the coagulation electrode 14, thereby improving the effectiveness of coagulation.

[0047] Preferably, the shaft assembly further includes a ceramic sleeve 17. The proximal end of the ceramic sleeve 17 is inserted into the distal end of the insulating sheath 11 and fixedly connected thereto, while the distal end of the ceramic sleeve 17 extends out of the insulating sheath 11. The proximal end of the electrocoagulation electrode 14 is inserted into and fixedly connected to the ceramic sleeve 17, while the distal end of the electrocoagulation electrode 14 extends out of the ceramic sleeve 17. Since the insulating sheath 11 is generally made of plastic with a low melting point, the ceramic sleeve 17 is provided to utilize the poor thermal conductivity of the ceramic sleeve 17 to reduce heat transfer from the electrode to the insulating sheath 11 and prevent deformation of the insulating sheath 11 due to heat.

[0048] Preferably, the first connector 15 and the second connector 16 are both located in the electrocoagulation position, and the distal end face of the coagulation electrode 14, the distal end face of the first needle electrode 12, and the distal end face of the second needle electrode 13 are all spherical. The spherical coagulation contact surface is more convenient for the user to operate the electric knife to coagulate the hemostasis point. Furthermore, in this embodiment, the first connector 15 and the second connector 16 are both located in the electrocoagulation position, and the distal end face of the coagulation electrode 14, the distal end face of the first needle electrode 12, and the distal end face of the second needle electrode 13 are all hemispherical. Optionally, the first connector 15 and the second connector 16 are both located in the electrocoagulation position, and the distal end face of the coagulation electrode 14, the distal end face of the first needle electrode 12, and the distal end face of the second needle electrode 13 are all flat or conical.

[0049] Preferably, a transfer chamber 21 is installed in the handle, the inlet of the transfer chamber 21 is connected to the liquid outlet of the water pump 22, the first connecting member 15 is tubular, the first connecting member 15 is connected to the transfer chamber 21, the second connecting member 16 is located in the tube of the first connecting member 15, and a water flow channel is formed between the second connecting member 16 and the first connecting member 15. During the movement of the first connecting member 15, the first connecting member 15 is always connected to the transfer chamber 21; the second connecting member 16 can move between the first water supply position, the electrocoagulation position and the electrocuting position arranged in sequence from near to far. When the first connecting member 15 is in the electrocoagulation position and the second connecting member 16 is in the first water supply position, the second needle electrode 13 pulls out the first needle electrode 12 and is located on the proximal side of the first needle electrode 12. In this way, when the second connector 16 is in the first water supply position and the first connector 15 is in the electrocoagulation position or the electrocuting position, the second needle electrode 13 is pulled out of the first needle electrode 12 and positioned proximal to the first needle electrode 12. At this point, the space within the tube of the first needle electrode 12 is exposed and connected to the first connector 15, thus realizing the water injection function of the high-frequency electrosurgical unit. The high-frequency electrosurgical unit has a water injection function that can spray water after electrocuting tissue to break up blood clots and expose the bleeding point, facilitating the electrocoagulation electrode 14 to perform spot coagulation and hemostasis on the bleeding point.

[0050] Preferably, a support member (not shown) is fixedly disposed within the tube of the first connector 15. The support member has a first through-hole formed in it, and the second connector 16 is disposed through the first through-hole and is loosely fitted with the first through-hole. A channel for water flow is formed between the support member and the tube wall of the first connector 15, or the support member has a second through-hole formed in it for water flow. In this manner, the support member disposed within the tube of the first connector 15 ensures normal water flow through the first connector 15 while also providing support and axial guidance for the second connector 16. This ensures that the position and structural state of the second needle-shaped electrode 13 remain stable after being separated from the first needle-shaped electrode 12, and also ensures that the second needle-shaped electrode 13 can be smoothly reinserted into the first needle-shaped electrode 12. Further preferably, the support member is disposed within the tube of the first connector 15 near the first needle-shaped electrode 12. Specifically, in this embodiment, the first through-hole is located at the axis of the first connector 15.

[0051] Preferably, the high-frequency electrosurgical unit further includes a first transmission member 3 and a second transmission member 4; the first connecting member 15 is fixedly connected to the transfer chamber 21, the second connecting member 16 extends through the transfer chamber 21 and is slidably connected thereto, the first transmission member 3 is connected to the transfer chamber 21 or the first connecting member 15, and the second transmission member 4 is connected to the portion of the second connecting member 16 that extends out of the transfer chamber 21. The first transmission member 3 drives the first connecting member 15 and the transfer chamber 21 to move, and the second transmission member 4 drives the second connecting member 16 to move. During the movement of the transfer chamber 21, the inlet of the transfer chamber 21 is always connected to the liquid outlet of the water pump 22. In this way, the first connecting member 15 can move linearly in the distal and proximal directions, and the second connecting member 16 can move linearly in the distal and proximal directions.

[0052] Further preferably, in this embodiment, the adapter chamber 21 has a sleeve portion 211 extending in the distal-proximal direction. The sleeve portion 211 is disposed through the proximal end of the handle housing, and the second connector 16 is inserted into the sleeve portion 211 and extends proximally. The first transmission member 3 is disposed at the portion where the sleeve portion 211 extends from the handle housing, and the second transmission member 4 is disposed at the portion where the second connector 16 extends from the sleeve portion 211. This facilitates the user to separately act on the first transmission member 3 and the second transmission member 4 to drive the first connector 15 and the second connector 16 to move linearly.

[0053] Specifically, in this embodiment, a mounting chamber 23 is fixedly provided within the handle. The inlet of the mounting chamber 23 is connected and fixedly coupled to the liquid outlet of the water pump 22. The transfer chamber 21 is slidably coupled within the mounting chamber 23. A first sealing ring 24 is sleeved on the proximal end of the transfer chamber 21, which is sealed to the inner wall of the mounting chamber 23 via the first sealing ring 24. A second sealing ring 25 is sleeved on the distal end of the transfer chamber 21, which is sealed to the inner wall of the mounting chamber 23 via the second sealing ring 25. An inlet of the transfer chamber 21 is provided on the side of the transfer chamber 21 corresponding to the inlet of the mounting chamber 23, which is connected to the inlet of the mounting chamber 23. During movement of the transfer chamber 21, the proximal end of the transfer chamber 21 is always sealed to the inner wall of the mounting chamber 23 via the first sealing ring 24, and the distal end of the transfer chamber 21 is always sealed to the inner wall of the mounting chamber 23 via the second sealing ring 25. The inlet of the transfer chamber 21 is always connected to the inlet of the mounting chamber 23.

[0054] Specifically, in this embodiment, a third sealing ring 26 is sleeved on the second connecting member 16, and the second connecting member 16 is sealedly connected to the inner wall of the sleeve portion 211 through the third sealing ring 26; during the movement of the second connecting member 16, the second connecting member 16 is always sealedly connected to the inner wall of the sleeve portion 211 through the third sealing ring 26.

[0055] Specifically, in this embodiment, the second connecting member 16 includes a first connecting portion and a second connecting portion connected in sequence from near to far, the first connecting portion and the second connecting portion are coaxially arranged, the radial dimension of the first connecting portion is greater than the radial dimension of the second connecting portion, the first connecting portion is arranged corresponding to the sleeve portion 211, and the second transmission member 4 is arranged at the position where the first connecting portion extends out of the sleeve portion 211, and the proximal end of the second connecting portion is connected to the second needle-shaped electrode 13.

[0056] Preferably, the first connector 15 is made of metal, and the proximal end of the first connector 15 is used to be electrically connected to the power supply. The second connector 16 is made of metal, and the proximal end of the second connector 16 is used to be electrically connected to the power supply. In this way, since the first needle electrode 12, the second needle electrode 13, and the coagulation electrode 14 are coaxially arranged, and the second needle electrode 13 is inserted into the first needle electrode 12, and the first needle electrode 12 is inserted into the coagulation electrode 14, only the first connector 15 and the second connector 16 need to be electrically connected to the power supply, and the coagulation electrode 14 does not need to be electrically connected to the power supply. When the first connector 15 and the second connector 16 are both in the coagulation position, the first connector 15 and the second connector 16 are energized. During the coagulation operation, tissue fluid will enter the gap between the first needle electrode 12 and the coagulation electrode 14 as a conductive medium, causing the first needle electrode 12 to conduct electricity to the coagulation electrode 14.

[0057] Specifically, in this embodiment, the second needle-shaped electrode 13 and the second connecting member 16 are both made of tungsten. Tungsten has high hardness, which enables the relatively thin second connecting member 16 to effectively transmit force to drive the second needle-shaped electrode 13 to move, while also providing the relatively thin second connecting member 16 with high strength for electrocautery.

[0058] Optionally, the first connecting member 15 includes a first supporting body and a first conductive wire buried in the first supporting body, the first end of the first conductive wire is electrically connected to the first needle-shaped electrode 12, and the second end of the first conductive wire is located at the proximal end of the first connecting member 15 for electrically connecting to the power supply; the second connecting member 16 includes a second supporting body and a second conductive wire buried in the second supporting body, the first end of the second conductive wire is electrically connected to the second needle-shaped electrode 13, and the second end of the second conductive wire is located at the proximal end of the second connecting member 16 for electrically connecting to the power supply.

[0059] Specifically, in this embodiment, a water pump 22 is further disposed within the handle, and the housing of the handle is provided with an infusion port 27 for communicating with a liquid storage device. The infusion port 27 is in communication with the liquid inlet of the water pump 22. Thus, by placing the water pump 22 within the handle, the water pump 22 is less susceptible to damage, improving the portability of the high-frequency electrosurgical unit. Furthermore, the number of external devices required to operate with the high-frequency electrosurgical unit is reduced, thereby reducing the space occupied by the external devices.

[0060] Example 2

[0061] Based on Example 1, this embodiment provides a high-frequency electric knife with coagulation and cutting functions. In the high-frequency electric knife, the second connecting piece can move between the first water supply position, the second water supply position, the electric coagulation position and the electric cutting position arranged in sequence from near to far. When the first connecting piece is located at the electric cutting position and the second connecting piece is located at the second water supply position, the second needle electrode is pulled out of the first needle electrode and is located on the proximal side of the first needle electrode.

[0062] In this way, the second connecting piece is located at the second water supply position, the first connecting piece is located at the electric cutting position, the second needle electrode will pull out the first needle electrode and be located proximal to the first needle electrode. At this time, the inner space of the first needle electrode is exposed and connected to the first connecting piece, realizing the water injection function of the high-frequency electric knife; since the second water supply position is located distal to the first water supply position, the second connecting piece only needs to move a shorter position to realize the water injection of the electric knife.

[0063] The rest of the contents are the same as those in Example 1 and will not be repeated here.

[0064] Example 3

[0065] The main differences between this embodiment and embodiment 1 are:

[0066] The first connecting member is slidably connected to and communicates with the transfer chamber, the second connecting member penetrates the transfer chamber and is slidably connected to the transfer chamber, the first transmission member is connected to the first connecting member, and the second transmission member is connected to the portion of the second connecting member that extends out of the transfer chamber. The first transmission member drives the first connecting member to move, and the second transmission member drives the second connecting member to move. In this way, the first connecting member can also achieve linear movement in the far-near direction, and the second connecting member can also achieve linear movement in the far-near direction.

[0067] It should be noted that the sliding connection between the first connecting member and the transition chamber is sealed, and the sliding connection between the second connecting member and the transition chamber is sealed.

[0068] The rest of the contents are the same as those in Example 1 and will not be repeated here.

[0069] Example 4

[0070] The main differences between this embodiment and embodiment 1 are:

[0071] The first connecting member is slidably connected to and communicates with the transfer chamber, the second connecting member is fixedly connected to the transfer chamber, the first transmission member is connected to the first connecting member, and the second transmission member is connected to the transfer chamber. The first transmission member drives the first connecting member to move, and the second transmission member drives the transfer chamber and the second connecting member to move. During the movement of the transfer chamber, the inlet of the transfer chamber is always connected to the liquid outlet of the water pump. In this way, the first connecting member can also move linearly in the far-near direction, and the second connecting member can also move linearly in the far-near direction.

[0072] Optionally, the second connecting member passes through the transfer chamber and is fixedly connected to the transfer chamber, and the second transmission member is connected to the transfer chamber or a portion of the second connecting member extending out of the transfer chamber.

[0073] It should be noted that the sliding connection between the first connecting member and the transfer chamber is sealed.

[0074] The rest of the contents are the same as those in Example 1 and will not be repeated here.

[0075] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0076] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0077] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0078] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0079] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high-frequency electric knife with coagulation and cutting functions, characterized in that: It comprises an insulating sheath (11), a first needle-shaped electrode (12), a second needle-shaped electrode (13), an electrocoagulation electrode (14), a first connecting piece (15), a second connecting piece (16), and a handle; The proximal end of the insulating sheath (11) is mounted on the handle, the first needle-shaped electrode (12) and the coagulation electrode (14) are both tubular, the second needle-shaped electrode (13) is solid columnar, the first needle-shaped electrode (12), the second needle-shaped electrode (13) and the coagulation electrode (14) are coaxially arranged, the proximal end of the coagulation electrode (14) is inserted into the distal end of the insulating sheath (11) and is fixedly connected to the insulating sheath (11), the distal end of the coagulation electrode (14) extends out of the insulating sheath (11), the first needle-shaped electrode (12) is inserted into the coagulation electrode (14) and is gap-matched with the coagulation electrode (14), and the second needle-shaped electrode (13) is inserted into the first needle-shaped electrode (12) and is gap-matched with the first needle-shaped electrode (12); The distal end of the first connecting member (15) is inserted into the insulating sheath (11) and fixedly connected to the first needle-shaped electrode (12), the proximal end of the first connecting member (15) is inserted into the handle and can be driven to make linear motion along the distal and proximal directions, the distal end of the second connecting member (16) is inserted into the insulating sheath (11) and fixedly connected to the second needle-shaped electrode (13), the proximal end of the second connecting member (16) is inserted into the handle and can be driven to make linear motion along the distal and proximal directions; when the first connecting member (15) and the second connecting member (16) are both located in the electrocoagulation position, the distal end face of the first needle-shaped electrode (12) is aligned with the distal end face of the electrocoagulation electrode (14) and the transition is smooth, and the distal end face of the second needle-shaped electrode (13) is aligned with the distal end face of the first needle-shaped electrode (12) and the transition is smooth; A transfer chamber (21) is installed in the handle, the inlet of the transfer chamber (21) is connected to the liquid outlet of the water pump, the first connecting member (15) is connected to the transfer chamber (21), the second connecting member (16) is located in the tube of the first connecting member (15), and the first connecting member (15) is always connected to the transfer chamber (21) during the movement of the first connecting member (15); The second connecting member (16) is capable of moving between a first water supply position, an electrocoagulation position, and an electrocuting position, which are arranged in sequence from near to far. When the first connecting member (15) is located at the electrocoagulation position and the second connecting member (16) is located at the first water supply position, the second needle-shaped electrode (13) is pulled out of the first needle-shaped electrode (12) and is located on the proximal side of the first needle-shaped electrode (12).

2. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: The first connecting member (15) is movable between an electrocoagulation position and an electrocuting position arranged in sequence from proximal to distal, the first connecting member (15) being located at the electrocuting position, and the distal end of the first needle-shaped electrode (12) extending out of the electrocoagulation electrode (14); The second connecting member (16) is movable between an electrocoagulation position and an electrocuting position arranged in sequence from near to far. The second connecting member (16) is located at the electrocuting position, and the distal end of the second needle-shaped electrode (13) extends out of the electrocoagulation electrode (14).

3. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: The first connecting member (15) and the second connecting member (16) are both located at the electrocoagulation position, and the distal end surface of the electrocoagulation electrode (14), the distal end surface of the first needle-shaped electrode (12), and the distal end surface of the second needle-shaped electrode (13) are all in a spherical cap shape.

4. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: The second connecting member (16) is capable of moving between a first water supply position, a second water supply position, an electrocoagulation position, and an electrocuting position, which are arranged in sequence from near to far. When the first connecting member (15) is located at the electrocuting position and the second connecting member (16) is located at the second water supply position, the second needle-shaped electrode (13) is pulled out of the first needle-shaped electrode (12) and is located on the proximal side of the first needle-shaped electrode (12).

5. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: A support member is fixedly arranged in the tube of the first connecting member (15), a first through hole is opened on the support member, and the second connecting member (16) is arranged to pass through the first through hole and is clearance-matched with the first through hole; a channel for water flow is formed between the support member and the tube wall of the first connecting member (15), or a second through hole is opened on the support member for water flow.

6. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: It also includes a first transmission member (3) and a second transmission member (4); The first connecting member (15) is fixedly connected to the transfer chamber (21), the second connecting member (16) passes through the transfer chamber (21) and is slidably connected to the transfer chamber (21), the first transmission member (3) is connected to the transfer chamber (21) or the first connecting member (15), and the second transmission member (4) is connected to the portion of the second connecting member (16) extending out of the transfer chamber (21). The first transmission member (3) drives the first connecting member (15) and the transfer chamber (21) to move, and the second transmission member (4) drives the second connecting member (16) to move. During the movement of the transfer chamber (21), the inlet of the transfer chamber (21) is always connected to the liquid outlet of the water pump.

7. The high-frequency electric knife with coagulation and cutting functions according to claim 6, characterized in that: The transfer chamber (21) has a sleeve portion (211) extending in a distal direction, the sleeve portion (211) is arranged through the proximal end portion of the handle housing, and the second connecting member (16) is inserted into the sleeve portion (211) and extends out of the sleeve portion (211) toward the proximal end; A first transmission member (3) is provided at the portion where the sleeve portion (211) extends out of the handle housing, and a second transmission member (4) is provided at the portion where the second connecting member (16) extends out of the sleeve portion (211).

8. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: It also includes a first transmission member (3) and a second transmission member (4); The first connecting member (15) is slidably connected to and communicates with the transfer chamber (21), the second connecting member (16) passes through the transfer chamber (21) and is slidably connected to the transfer chamber (21), the first transmission member (3) is connected to the first connecting member (15), the second transmission member (4) is connected to the portion of the second connecting member (16) extending out of the transfer chamber (21), the first transmission member (3) drives the first connecting member (15) to move, and the second transmission member (4) drives the second connecting member (16) to move; or, The first connecting member (15) is slidably connected to and communicates with the transfer chamber (21), the second connecting member (16) is fixedly connected to the transfer chamber (21), the first transmission member (3) is connected to the first connecting member (15), and the second transmission member (4) is connected to the transfer chamber (21). The first transmission member (3) drives the first connecting member (15) to move, and the second transmission member (4) drives the transfer chamber (21) and the second connecting member (16) to move. During the movement of the transfer chamber (21), the inlet of the transfer chamber (21) is always connected to the liquid outlet of the water pump.

9. The high-frequency electric knife with coagulation and cutting functions according to claim 1, characterized in that: The first connecting member (15) is made of metal, and the proximal end of the first connecting member (15) is used for electrically connecting to a power source, and / or, the second connecting member (16) is made of metal, and the proximal end of the second connecting member (16) is used for electrically connecting to a power source; or, The first connecting member (15) includes a first supporting body and a first conductive wire embedded in the first supporting body, wherein the first end of the first conductive wire is electrically connected to the first needle-shaped electrode (12), and the second end of the first conductive wire is located at the proximal end of the first connecting member (15) for electrically connecting to a power source, and / or the second connecting member (16) includes a second supporting body and a second conductive wire embedded in the second supporting body, wherein the first end of the second conductive wire is electrically connected to the second needle-shaped electrode (13), and the second end of the second conductive wire is located at the proximal end of the second connecting member (16) for electrically connecting to a power source.

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