High-frequency electrotome with coagulation and cutting functions

Abstract

The invention belongs to the technical field of medical instruments, and provides a high-frequency electrotome with coagulation and cutting functions, the near end of an insulating sheath tube is mounted on a handle, a first needle electrode and an electrocoagulation electrode are tubular, a second needle electrode is in a solid column shape, and the first needle electrode, the second needle electrode and the electrocoagulation electrode are coaxially arranged; the near end of the electrocoagulation electrode is inserted into the far end of the insulating sheath tube and is fixedly connected with the insulating sheath tube, the far end of the electrocoagulation electrode extends out of the insulating sheath tube, the first needle electrode is inserted into the electrocoagulation electrode and is in clearance fit with the electrocoagulation electrode, and the second needle electrode is inserted into the first needle electrode and is in clearance fit with the first needle electrode; the far end of a first connecting piece capable of being driven to do linear motion in the far and near direction is inserted into the insulating sheath tube to be fixedly connected with the first needle-shaped electrode, and the far end of a second connecting piece capable of being driven to do linear motion in the far and near direction is inserted into the insulating sheath tube to be fixedly connected with the second needle-shaped electrode. The high-frequency electrotome can switch different electrodes according to requirements.

Description

Technical Field

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

[0002] A high-frequency electrotome is an electro-surgical instrument that replaces a mechanical scalpel for tissue cutting. When the high-frequency high-voltage current generated by the effective electrode tip contacts the body, it heats the tissue, realizes the separation and coagulation of the body tissue, and thus serves the purpose of cutting and hemostasis. During the use of a high-frequency electrotome, a corresponding neutral electrode plate needs to be matched. When in use, the neutral electrode plate is pasted on the part of the patient with rich muscles, which can conduct the current gathered in the human body back to instruments such as the high-frequency electrotome, thus forming a complete high-frequency circuit. In this way, during the use of high-frequency surgery, the current can be dispersed, reducing the risk of current concentration, safely collecting the current and transmitting it to the outside of the human body to protect the safety of the patient.

[0003] During the process of the high-frequency electrotome operating on tissues, generally, a large-diameter needle-shaped electrode is used to handle dense connective tissues with a collagen content > 60%, such as fascia, scars, etc., and a small-diameter needle-shaped electrode is used to handle the area dominated by elastic fibers, such as the adventitia of blood vessels, nerve sheaths, etc. In complex surgeries, the large-diameter needle-shaped electrode and the small-diameter needle-shaped electrode are often used in combination. The diameter of the large-diameter electrode is 1.5 - 2.5 mm, and the diameter of the small-diameter electrode is 0.3 - 0.8 mm. Moreover, during the use of the needle-shaped electrode, the bleeding rate is relatively high. When bleeding occurs, it is necessary to quickly replace the dedicated electrocoagulation electrode, use a flushing pump to wash away the blood clot to expose the bleeding point, and use the electrocoagulation electrode to perform spot coagulation hemostasis on the bleeding point. Currently, an electrotome is often fixedly equipped with one electrode, so that multiple electrotomes with different electrodes need to be used in one surgery. The relatively large number of electrotomes makes the instruments frequently enter and exit the trocar for replacement, with complex operations and prolonged surgery time. Moreover, the relatively large number of electrotomes will bring high surgical costs to the patient.

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

[0005] (I) Technical Problems to be Solved

[0006] In view of the problems existing in the above technology, the present invention solves at least to a certain extent. For this reason, the purpose of the present invention is to propose a high-frequency electrotome with coagulation and cutting functions that can switch different electrodes.

[0007] (II) Technical Solutions

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

[0009] The present invention provides a high-frequency electrotome with coagulation and cutting functions, including an insulating sheath tube, 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 tube is mounted on the handle, both the first needle-shaped electrode and the coagulation electrode are tubular, the second needle-shaped electrode is a solid column, 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 tube and fixedly connected to the insulating sheath tube, the distal end of the coagulation electrode extends out of the insulating sheath tube, the first needle-shaped electrode is inserted into the coagulation electrode and has a clearance fit with the coagulation electrode, the second needle-shaped electrode is inserted into the first needle-shaped electrode and has a clearance fit with the first needle-shaped electrode; the distal end of the first connecting piece is inserted into the insulating sheath tube and fixedly connected to the first needle-shaped electrode, the proximal end of the first connecting piece is inserted into the handle and can be driven to move in a linear motion along the near-far direction, the distal end of the second connecting piece is inserted into the insulating sheath tube and fixedly connected to the second needle-shaped electrode, the proximal end of the second connecting piece is inserted into the handle and can be driven to move in a linear motion along the near-far direction; when both the first connecting piece and the second connecting piece are in the coagulation position, the distal end face of the first needle-shaped electrode is aligned with the distal end face of the coagulation electrode and has a smooth transition, and the distal end face of the second needle-shaped electrode is aligned with the distal end face of the first needle-shaped electrode and has a smooth transition.

[0010] Optionally, the first connecting piece can move between a coagulation position and a cutting position arranged in sequence from near to far, when the first connecting piece is in the cutting position, the distal end of the first needle-shaped electrode extends out of the coagulation electrode; the second connecting piece can move between a coagulation position and a cutting position arranged in sequence from near to far, when the second connecting piece is in the cutting position, the distal end of the second needle-shaped electrode extends out of the coagulation electrode.

[0011] Optionally, when both the first connecting piece and the second connecting piece are in the coagulation position, the distal end face of the coagulation electrode, the distal end face of the first needle-shaped electrode and the distal end face of the second needle-shaped electrode together form a spherical crown shape.

[0012] Optionally, a transfer chamber is installed in the handle, the inlet of the transfer chamber is communicated with the liquid outlet of the water pump, the first connecting piece is tubular and is communicated with the transfer chamber, the second connecting piece is located inside the tube of the first connecting piece, and during the movement of the first connecting piece, the first connecting piece is always communicated with the transfer chamber; the second connecting piece can move between a first water supply position, a coagulation position and a cutting position arranged in sequence from near to far, when the first connecting piece is in the coagulation position and the second connecting piece is in the first water supply position, the second needle-shaped electrode is pulled out of the first needle-shaped electrode and is located on the near side of the first needle-shaped electrode.

[0013] Optionally, the second connecting piece can move between a first water supply position, a second water supply position, a coagulation position and a cutting position arranged in sequence from near to far, when the first connecting piece is in the cutting position and the second connecting piece is in the second water supply position, the second needle-shaped electrode is pulled out of the first needle-shaped electrode and is located on the near side of the first needle-shaped electrode.

[0014] Optionally, a support member is fixedly arranged inside the tube of the first connecting member. A first through hole is formed in the support member, and the second connecting member passes through the first through hole and is in clearance fit 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 formed in the support member.

[0015] Optionally, the high-frequency electrotome with coagulation and cutting functions further 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, 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, the second transmission member drives the second connecting member to move, and during the movement of the transfer chamber, the inlet of the transfer chamber is always communicated with the liquid outlet of the water pump.

[0016] Optionally, the transfer chamber has a sleeve portion extending in the near-far direction. The sleeve portion passes through the proximal end of the handle housing, and the second connecting member is inserted into the sleeve portion and extends out of the sleeve portion towards the near side; the first transmission member is arranged on the part of the sleeve portion extending out of the handle housing, and the second transmission member is arranged on the part of the second connecting member extending out of the sleeve portion.

[0017] Optionally, the high-frequency electrotome with coagulation and cutting functions further includes a first transmission member and a second transmission member; the first connecting member is slidably connected to and communicated with 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 first connecting member, 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 to 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 communicated with the liquid outlet of the water pump.

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

[0019] (III) Advantageous Effects

[0020] The advantageous effects of the present invention are as follows:

[0021] The high-frequency electrotome with coagulation and cutting functions provided by the present invention can switch between an electrocoagulation electrode, a first needle-shaped electrode, and a second needle-shaped electrode on one high-frequency electrotome, so as to be respectively used for the electrocoagulation working mode, the large-caliber electrode electrocision working mode, and the small-caliber electrode electrocision working mode of the high-frequency electrotome, reducing the number of electrotomes used in one operation, shortening the operation time, and reducing the cost pressure on patients. Moreover, in the high-frequency electrotome provided by the present invention, by coaxially arranging the first needle-shaped electrode, the second needle-shaped electrode, and the electrocoagulation electrode, with the second needle-shaped electrode inserted into the first needle-shaped electrode and the first needle-shaped electrode inserted into the electrocoagulation electrode, the structure is more compact. The distal end faces of the first needle-shaped electrode and the second needle-shaped electrode are used as electrocoagulation contact surfaces to fill the holes on the distal end face of the electrocoagulation electrode, which is beneficial to designing a larger-area electrocoagulation contact surface and improving the effectiveness of electrocoagulation. Moreover, the tubular first needle-shaped electrode provides a structural basis for realizing the water spraying function of the electrotome subsequently. 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 the high-frequency electrotome according to Embodiment 1;

[0024] Figure 2 is a schematic diagram of the distal end structure of the high-frequency electrotome in the electrocoagulation working mode according to Embodiment 1;

[0025] Figure 3 is a schematic diagram of the distal end structure of the high-frequency electrotome in the large-caliber electrode electrocision working mode according to Embodiment 1;

[0026] Figure 4 is a schematic diagram of the distal end structure of the high-frequency electrotome in the small-caliber electrode electrocision working mode according to Embodiment 1;

[0027] Figure 5 is a schematic cross-sectional view of the high-frequency electrotome in the electrocoagulation working mode according to Embodiment 1;

[0028] Figure 6 is Figure 5 an enlarged schematic view of part A in

[0029] Figure 7 is Figure 5 an enlarged schematic view of part B in

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

[0031] Figure 9 is Figure 8 an enlarged schematic view of part A in

[0032] Figure 10 is Figure 8 an enlarged schematic view of part B in

[0033]

Explanation of Attached Drawing Reference Signs

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

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

[0036] 211: Sleeve part;

[0037] 3: First transmission part;

[0038] 4: Second transmission part. Detailed Embodiment

[0039] For better explaining the present invention for easy understanding, the present invention will be described in detail below in conjunction with the attached drawings through specific embodiments. Among them, the "proximal" mentioned herein refers to the side close to the operator, and the "distal" refers to the side close to the patient. The orientation nouns such as "upper", "lower", "front", "rear", "left", and "right" mentioned herein are Figure 1 oriented with reference to

[0040] Embodiment 1

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

[0042] The shaft assembly includes an insulating sheath tube 11, a first needle-shaped electrode 12, a second needle-shaped electrode 13, an electrocoagulation electrode 14, a first connecting member 15, and a second connecting member 16. The proximal end of the insulating sheath tube 11 is connected to the handle. Both the first needle-shaped electrode 12 and the electrocoagulation electrode 14 are tubular, the second needle-shaped electrode 13 is a solid columnar shape, the first needle-shaped electrode 12, the second needle-shaped electrode 13, and the electrocoagulation electrode 14 are coaxially arranged. The proximal end of the electrocoagulation electrode 14 is inserted into the distal end of the insulating sheath tube 11 and fixedly connected to the insulating sheath tube 11. The distal end of the electrocoagulation electrode 14 extends out of the insulating sheath tube 11. The first needle-shaped electrode 12 is inserted into the electrocoagulation electrode 14, and there is a clearance fit between the first needle-shaped electrode 12 and the electrocoagulation electrode 14. The second needle-shaped electrode 13 is inserted into the first needle-shaped electrode 12, and there is a clearance fit between the second needle-shaped electrode 13 and the first needle-shaped electrode 12.

[0043] The distal end of the first connecting member 15 is inserted into the insulating sheath tube 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 perform linear motion in the proximal-distal direction. The distal end of the second connecting member 16 is inserted into the insulating sheath tube 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 perform linear motion in the proximal-distal direction.

[0044] The first connecting member 15 can move between an electrocoagulation position and an electrosection position arranged in sequence from proximal to distal. The second connecting member 16 can move between an electrocoagulation position and an electrosection position arranged in sequence from proximal to distal. When both the first connecting member 15 and the second connecting member 16 are 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 has a smooth transition. 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 has a smooth transition. When the first connecting member 15 is in the electrosection position, the distal end of the first needle-shaped electrode 12 extends out of the electrocoagulation electrode 14 for the high-frequency electrotome to perform electrosection operation with a large-diameter electrode. When the second connecting member 16 is in the electrosection position, the distal end of the second needle-shaped electrode 13 extends out of the electrocoagulation electrode 14 for the high-frequency electrotome to perform electrosection operation with a small-diameter electrode.

[0045] The high-frequency electrotome configured as such, when in the electrocoagulation working mode, both the first connecting member 15 and the second connecting member 16 are located at the electrocoagulation position. The distal end faces of the electrocoagulation electrode 14, the first needle-shaped electrode 12, and the second needle-shaped electrode 13 jointly form an electrocoagulation contact surface, capable of effectively performing spot electrocoagulation hemostasis on the bleeding point. When the high-frequency electrotome is in the large-caliber electrode electrosection working mode, the first connecting member 15 is located at the electrosection position, and the second connecting member 16 is located at the electrocoagulation position. The first needle-shaped electrode 12 extending out of the electrocoagulation electrode 14 can perform electrosection operation on the tissue. When the high-frequency electrotome is in the small-caliber electrode electrosection working mode, the second connecting member 16 is located at the electrosection position, and the first connecting member 15 is located at the electrocoagulation position. The second needle-shaped electrode 13 extending out of the electrocoagulation electrode 14 can perform electrosection operation on the tissue. Thus, the high-frequency electrotome provided in this embodiment can realize the switching of the electrocoagulation electrode 14, the first needle-shaped electrode 12, and the second needle-shaped electrode 13 on one high-frequency electrotome, respectively for the electrocoagulation working mode, the large-caliber electrode electrosection working mode, and the small-caliber electrode electrosection working mode of the high-frequency electrotome, reducing the number of electrotomes used in one operation, shortening the operation time and reducing the cost pressure on the patient. Moreover, in the high-frequency electrotome provided in this embodiment, by coaxially arranging the first needle-shaped electrode 12, the second needle-shaped electrode 13, and the electrocoagulation electrode 14, and inserting the second needle-shaped electrode 13 into the first needle-shaped electrode 12, and inserting the first needle-shaped electrode into the electrocoagulation electrode 14, the structure is more compact. The distal end faces of the first needle-shaped electrode 12 and the second needle-shaped electrode 13 are used as the electrocoagulation contact surface to fill the holes on the distal end face of the electrocoagulation electrode 14, which is beneficial to designing a larger-area electrocoagulation contact surface and improving the effectiveness of electrocoagulation. And the tubular first needle-shaped electrode 12 provides a structural basis for realizing the water spraying function of the electrotome subsequently.

[0046] Specifically, in this embodiment, the electrocoagulation electrode 14 has an insertion part and an electrocoagulation part connected in sequence from near to far. The insertion part is inserted into the distal end of the insulating sheath 11, and the electrocoagulation part extends out of the insulating sheath 11. The insertion part and the electrocoagulation part are coaxially arranged, and the radial dimension of the electrocoagulation part is larger than that of the insertion part. Thus, it is beneficial for the distal end face of the electrocoagulation electrode 14 to have a larger area and improve the effectiveness of electrocoagulation.

[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 to the insulating sheath 11. 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 the ceramic sleeve 17 and fixedly connected to the ceramic sleeve 17, and 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 material with a low melting point, by providing the ceramic sleeve 17 and utilizing the poor heat conduction performance of the ceramic sleeve 17, the heat transfer from the electrode to the insulating sheath 11 is reduced, preventing the insulating sheath 11 from being deformed by heat.

[0048] Preferably, both the first connector 15 and the second connector 16 are located at the electrocoagulation position. The distal end faces of the electrocoagulation electrode 14, the distal end face of the first needle electrode 12, and the distal end face of the second needle electrode 13 together form a spherical crown shape. The electrocoagulation contact surface in the shape of a spherical crown is more convenient for the user to operate the electrocautery to perform spot electrocoagulation on the hemostatic point. Further, in this embodiment, both the first connector 15 and the second connector 16 are located at the electrocoagulation position. The distal end faces of the electrocoagulation electrode 14, the distal end face of the first needle electrode 12, and the distal end face of the second needle electrode 13 together form a hemispherical surface. Optionally, both the first connector 15 and the second connector 16 are located at the electrocoagulation position. The distal end faces of the electrocoagulation electrode 14, the distal end face of the first needle electrode 12, and the distal end face of the second needle electrode 13 together form a flat surface or a conical surface.

[0049] Preferably, a transfer chamber 21 is installed inside the handle. The inlet of the transfer chamber 21 is communicated with the liquid outlet of the water pump 22. The first connector 15 is tubular, and the first connector 15 is communicated with the transfer chamber 21. The second connector 16 is located inside the tube of the first connector 15. A water flow channel is formed between the second connector 16 and the first connector 15. During the movement of the first connector 15, the first connector 15 is always communicated with the transfer chamber 21. The second connector 16 can move between a first water supply position, an electrocoagulation position, and an electrosection position arranged in sequence from near to far. When the first connector 15 is located at the electrocoagulation position and the second connector 16 is located at the first water supply position, the second needle electrode 13 is pulled out of the first needle electrode 12 and is located on the proximal side of the first needle electrode 12. Thus, when the second connector 16 is located at the first water supply position and the first connector 15 is located at the electrocoagulation position or the electrosection position, the second needle electrode 13 will be pulled out of the first needle electrode 12 and be located on the proximal side of the first needle electrode 12. At this time, the inner space of the first needle electrode 12 is exposed and communicated with the first connector 15, realizing the water injection function of the high-frequency electrocautery. The high-frequency electrocautery has a water injection function and can spray water after electrosecting tissues to wash away blood clots and expose the bleeding point, facilitating the electrocoagulation electrode 14 to perform spot electrocoagulation hemostasis on the bleeding point.

[0050] Preferably, a support member (not shown in the figure) is fixedly arranged inside the tube of the first connecting member 15. A first through hole is formed in the support member. The second connecting member 16 passes through the first through hole and is in clearance fit 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 for water flow is formed in the support member. In this way, by arranging the support member inside the tube of the first connecting member 15, while ensuring the normal water flow of the first connecting member 15, it can support and axially guide the second connecting member 16. On the one hand, it ensures the stability of the position and structural state of the second needle-shaped electrode 13 after separating from the first needle-shaped electrode 12. On the other hand, it ensures that the second needle-shaped electrode 13 can be smoothly inserted into the first needle-shaped electrode 12 again. Further preferably, the support member is arranged at a position close to the first needle-shaped electrode 12 inside the tube of the first connecting member 15. Specifically, in this embodiment, the first through hole is located on the axis of the first connecting member 15.

[0051] Preferably, the high-frequency electrotome 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 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. The second transmission member 4 is connected to the part 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. 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 communicated with the liquid outlet of the water pump 22. In this way, the first connecting member 15 can be made to move in a straight line in the near and far directions, and the second connecting member 16 can be made to move in a straight line in the near and far directions.

[0052] Further preferably, in this embodiment, the transfer chamber 21 has a sleeve portion 211 extending in the near and far directions. The sleeve portion 211 passes through the proximal end of the handle housing. The second connecting member 16 is inserted into the sleeve portion 211 and extends out of the sleeve portion 211 towards the near side. The first transmission member 3 is arranged on the part of the sleeve portion 211 extending out of the handle housing. The second transmission member 4 is arranged on the part of the second connecting member 16 extending out of the sleeve portion 211. In this way, it is convenient for the user to act on the first transmission member 3 and the second transmission member 4 respectively to drive the first connecting member 15 and the second connecting member 16 to move in a straight line.

[0053] Specifically, in this embodiment, an installation chamber 23 is fixedly arranged inside the handle. The inlet of the installation chamber 23 is communicated with and fixedly connected to the liquid outlet of the water pump 22. The adapter chamber 21 is slidably connected inside the installation chamber 23. A first sealing ring 24 is sleeved on the proximal end of the adapter chamber 21. The proximal end of the adapter chamber 21 is hermetically connected to the inner wall of the installation chamber 23 through the first sealing ring 24. A second sealing ring 25 is sleeved on the distal end of the adapter chamber 21. The distal end of the adapter chamber 21 is hermetically connected to the inner wall of the installation chamber 23 through the second sealing ring 25. An inlet of the adapter chamber 21 is formed on the side of the adapter chamber 21 corresponding to the inlet of the installation chamber 23 to communicate with the inlet of the installation chamber 23. During the movement of the adapter chamber 21, the proximal end of the adapter chamber 21 is always hermetically connected to the inner wall of the installation chamber 23 through the first sealing ring 24, the distal end of the adapter chamber 21 is always hermetically connected to the inner wall of the installation chamber 23 through the second sealing ring 25, and the inlet of the adapter chamber 21 is always communicated with the inlet of the installation chamber 23.

[0054] Specifically, in this embodiment, a third sealing ring 26 is sleeved on the second connecting member 16. The second connecting member 16 is hermetically 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 hermetically 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 larger than that of the second connecting portion. The first connecting portion is arranged corresponding to the sleeve portion 211. A second transmission member 4 is arranged on the portion where the first connecting portion extends out of the sleeve portion 211. The proximal end of the second connecting portion is connected to the second needle-shaped electrode 13.

[0056] Preferably, the first connecting member 15 is made of a metal material. The proximal end of the first connecting member 15 is used for electrically connecting to a power source. The second connecting member 16 is made of a metal material. The proximal end of the second connecting member 16 is used for electrically connecting to a power source. Thus, due to the coaxial arrangement of the first needle-shaped electrode 12, the second needle-shaped electrode 13, and the electrocoagulation electrode 14, and the second needle-shaped electrode 13 is inserted into the first needle-shaped electrode 12, and the first needle-shaped electrode 12 is inserted into the electrocoagulation electrode 14, only the first connecting member 15 and the second connecting member 16 need to be electrically connected to the power source, and there is no need to electrically connect the electrocoagulation electrode 14 to the power source. When both the first connecting member 15 and the second connecting member 16 are in the electrocoagulation position, the first connecting member 15 and the second connecting member 16 are energized. During the electrocoagulation operation, tissue fluid will enter the gap between the first needle-shaped electrode 12 and the electrocoagulation electrode 14 as a conductive medium, enabling the first needle-shaped electrode 12 to conduct electricity to the electrocoagulation electrode 14.

[0057] Specifically, in this embodiment, both the second needle-shaped electrode 13 and the second connecting member 16 are made of tungsten. Tungsten has high hardness, enabling the relatively thin second connecting member 16 to effectively transmit force to drive the movement of the second needle-shaped electrode 13, and at the same time enabling the relatively thin second connecting member 16 to have high strength for electrocision.

[0058] Optionally, the first connecting member 15 includes a first support body and a first conducting wire buried in the first support body. The first end of the first conducting wire is electrically connected to the first needle-shaped electrode 12, and the second end of the first conducting wire is located at the proximal end of the first connecting member 15 for electrical connection with a power source; the second connecting member 16 includes a second support body and a second conducting wire buried in the second support body. The first end of the second conducting wire is electrically connected to the second needle-shaped electrode 13, and the second end of the second conducting wire is located at the proximal end of the second connecting member 16 for electrical connection with a power source.

[0059] Specifically, in this embodiment, a water pump 22 is further provided in the handle. An infusion port 27 for communicating with a liquid storage device is provided on the housing of the handle, and the infusion port 27 is communicated with the liquid inlet of the water pump 22. In this way, by placing the water pump 22 inside the handle, the water pump 22 is not easily damaged, improving the portability of the use of the high-frequency electrotome, and reducing the external devices used in cooperation with the high-frequency electrotome, thereby reducing the occupied space of the external devices.

[0060] Embodiment 2

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

[0062] In this way, when the second connecting member is at the second water supply position and the first connecting member is at the electrocision position, the second needle-shaped electrode will be pulled out of the first needle-shaped electrode and is located on the near side of the first needle-shaped electrode. At this time, the inner space of the tube of the first needle-shaped electrode is exposed and communicated with the first connecting member, realizing the water injection function of the high-frequency electrotome; since the second water supply position is located on the far side of the first water supply position, only a short movement of the second connecting member can achieve the water injection of the electrotome.

[0063] The rest of the content that is the same as that in Embodiment 1 will not be elaborated here.

[0064] Embodiment 3

[0065] The main difference between this embodiment and Embodiment 1 is as follows:

[0066] The first connecting piece is slidably connected to and communicates with the adapter chamber. The second connecting piece penetrates through the adapter chamber and is slidably connected to the adapter chamber. The first transmission piece is connected to the first connecting piece, and the second transmission piece is connected to the part of the second connecting piece extending out of the adapter chamber. The first transmission piece drives the first connecting piece to move, and the second transmission piece drives the second connecting piece to move. In this way, the first connecting piece can also move in a straight line in the near-far direction, and the second connecting piece can move in a straight line in the near-far direction.

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

[0068] The rest of the content that is the same as that in Embodiment 1 will not be elaborated here.

[0069] Embodiment 4

[0070] The main difference between this embodiment and Embodiment 1 lies in:

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

[0072] Optionally, the second connecting piece penetrates through the adapter chamber and is fixedly connected to the adapter chamber, and the second transmission piece is connected to the adapter chamber or the part of the second connecting piece extending out of the adapter chamber.

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

[0074] The rest of the content that is the same as that in Embodiment 1 will not be elaborated here.

[0075] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0076] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly defined or limited, when a first feature is "on" or "under" a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or it merely means that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or it merely means that the horizontal height of the first feature is lower than that of the second feature.

[0078] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0079] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-frequency electrotome with coagulation and cutting functions, characterized in that, It includes an insulating sheath tube (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 tube (11) is mounted on the handle. Both the first needle-shaped electrode (12) and the electrocoagulation electrode (14) are 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 electrocoagulation electrode (14) are coaxially arranged. The proximal end of the electrocoagulation electrode (14) is inserted into the distal end of the insulating sheath tube (11) and fixedly connected to the insulating sheath tube (11). The distal end of the electrocoagulation electrode (14) extends out of the insulating sheath tube (11). The first needle-shaped electrode (12) is inserted into the electrocoagulation electrode (14) and has a clearance fit with the electrocoagulation electrode (14). The second needle-shaped electrode (13) is inserted into the first needle-shaped electrode (12) and has a clearance fit with the first needle-shaped electrode (12); The distal end of the first connecting piece (15) is inserted into the insulating sheath tube (11) and fixedly connected to the first needle-shaped electrode (12). The proximal end of the first connecting piece (15) is inserted into the handle and can be driven to move in a linear motion along the near-far direction. The distal end of the second connecting piece (16) is inserted into the insulating sheath tube (11) and fixedly connected to the second needle-shaped electrode (13). The proximal end of the second connecting piece (16) is inserted into the handle and can be driven to move in a linear motion along the near-far direction. When both the first connecting piece (15) and the second connecting piece (16) are 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 has a smooth transition. 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 has a smooth transition.

2. The high-frequency electrotome with coagulation and cutting functions according to claim 1, characterized in that, The first connecting piece (15) can move between the electrocoagulation position and the electrosection position arranged in sequence from near to far. When the first connecting piece (15) is in the electrosection position, the distal end of the first needle-shaped electrode (12) extends out of the electrocoagulation electrode (14); The second connecting piece (16) can move between the electrocoagulation position and the electrosection position arranged in sequence from near to far. When the second connecting piece (16) is in the electrosection position, the distal end of the second needle-shaped electrode (13) extends out of the electrocoagulation electrode (14).

3. The high-frequency electrotome with coagulation and cutting functions according to claim 1, characterized in that, When both the first connecting piece (15) and the second connecting piece (16) are in the electrocoagulation position, the distal end face of the electrocoagulation 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) together form a spherical crown shape.

4. The high-frequency electrotome with coagulation and cutting functions according to claim 2, characterized in that, A transfer chamber (21) is installed in the handle. The inlet of the transfer chamber (21) is communicated with the liquid outlet of the water pump. The first connecting piece (15) is tubular and is communicated with the transfer chamber (21). The second connecting piece (16) is located inside the tube of the first connecting piece (15). During the movement of the first connecting piece (15), the first connecting piece (15) is always communicated with the transfer chamber (21); The second connecting member (16) is capable of moving between a first water supply position, a electrocoagulation position, and an electrosection position arranged in sequence from near to far. When the first connecting member (15) is at the electrocoagulation position and the second connecting member (16) is at the first water supply position, the second needle-shaped electrode (13) is withdrawn from the first needle-shaped electrode (12) and is located proximal to the first needle-shaped electrode (12).

5. The high-frequency electrotome with coagulation and cutting functions according to claim 4, 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 electrosection position arranged in sequence from near to far. When the first connecting member (15) is at the electrosection position and the second connecting member (16) is at the second water supply position, the second needle-shaped electrode (13) is withdrawn from the first needle-shaped electrode (12) and is located proximal to the first needle-shaped electrode (12).

6. The high-frequency electrotome with coagulation and cutting functions according to claim 4, wherein, A support member is fixedly arranged inside the tube of the first connecting member (15). A first through hole is formed in the support member. The second connecting member (16) passes through the first through hole and is in clearance fit 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 for water flow is formed in the support member.

7. The high-frequency electrotome with coagulation and cutting functions according to claim 4, characterized in that It 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) 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). The second transmission member (4) is connected to the part 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. 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 communicated with the liquid outlet of the water pump.

8. The high-frequency electrotome with coagulation and cutting functions according to claim 7, characterized in that, The transfer chamber (21) has a sleeve portion (211) extending in the near-far direction. The sleeve portion (211) passes through the proximal end of the handle housing. The second connecting member (16) is inserted into the sleeve portion (211) and extends out of the sleeve portion (211) towards the near side. The first transmission member (3) is arranged on the part of the sleeve portion (211) extending out of the handle housing. The second transmission member (4) is arranged on the part of the second connecting member (16) extending out of the sleeve portion (211).

9. The high-frequency electrotome with coagulation and cutting functions according to claim 4, characterized in that, It further includes a first transmission member (3) and a second transmission member (4); The first connecting member (15) is slidably connected and communicated 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 part 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. 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 adapter chamber (21), the second connecting member (16) is fixedly connected to the adapter chamber (21), the first transmission member (3) is connected to the first connecting member (15), the second transmission member (4) is connected to the adapter chamber (21), the first transmission member (3) drives the first connecting member (15) to move, the second transmission member (4) drives the adapter chamber (21) and the second connecting member (16) to move, and during the movement of the adapter chamber (21), the inlet of the adapter chamber (21) is always in communication with the liquid outlet of the water pump.

10. The high-frequency electrotome 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 electrical connection 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 electrical connection to a power source; or, The first connecting member (15) includes a first support body and a first conductive wire embedded in the first support 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 electrical connection to a power source, and / or the second connecting member (16) includes a second support body and a second conductive wire embedded in the second support 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 electrical connection to a power source.

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