Electrosurgical scalpel pen and electrosurgical system

Abstract

The utility model relates to an electrosurgical operating knife pen and an electrosurgical operating system. The electrosurgical operating knife pen comprises a shell, a pen body and a pen body, the cutter bar is installed in the shell, the cutter bar comprises a far end and a near end which are opposite to each other, the far end is used for installing an electrode assembly, and the cutter bar further comprises a cutter bar cavity communicated between the far end and the near end; the pipeline assembly selectively communicates with the cutter bar cavity and comprises a first pipeline and a second pipeline; the switching valve is arranged between the pipeline assembly and the near end of the cutter bar and used for enabling one of the first pipeline and the second pipeline to be communicated with the cutter bar cavity. By arranging the switching valve, one of the first pipeline and the second pipeline is selectively communicated with or not communicated with the cutter bar cavity, functions corresponding to different pipelines are selected through switching of the switching valve, switching is achieved through single action of a single component, switching is convenient and fast, different functions share the cutter bar cavity in the cutter bar, and the structure of the knife pen is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an electrosurgical pencil and an electrosurgical system. BACKGROUND

[0002] Electrosurgery Unit (ESU) has become an indispensable device in the operating room. In a narrow sense, ESU refers to a high-frequency electric knife that directly uses high-frequency high-voltage current to cause thermal effects on tissues to achieve cutting and hemostasis. In a broad sense, ESU refers to a device that uses high-frequency electric energy to achieve the purpose of cutting, separating, and hemostasis of tissues, including high-frequency electric knives, argon knives, radiofrequency knives, and ion knives. A high-frequency electric knife is an electrosurgical instrument that generates high-frequency high-voltage current through the tip of the active electrode, which, when in contact with the body, heats the tissue to achieve separation and coagulation of the tissue, thereby achieving the purpose of cutting and hemostasis. In monopolar mode, the current forms a complete circuit through the electrode, the patient plate, and the connecting wire to cut and coagulate the tissue. Bipolar coagulation provides high-frequency electric energy to the body tissue through the two tips of the bipolar forceps, causing the blood vessels between the two tips of the bipolar forceps to dehydrate and coagulate to achieve the purpose of hemostasis. However, the living tissue being treated dehydrates and carbonizes at high temperatures during the use of the high-frequency electric knife, which can generate smoke / dust, posing a threat to the health of the doctor, so it is usually used in combination with a smoke suction device. For a plasma knife, it can cut and cauterize tissues at the same time by spraying a small amount of high-temperature gas onto the tissue surface, and in some cases it can seal blood vessels up to 3 mm in diameter. During use, the plasma electric knife needs to continuously supply sodium chloride solution to the tip (electrode head) to form and maintain low-temperature plasma. Under a stable electric field at 100 kHz, the excitation of one molecule of NaCl generates 8 electron volts of kinetic energy, and the breaking of a peptide bond requires 4 electron volts of kinetic energy, causing the target tissue cells to disintegrate in molecules, and the proteins and other tissues to be vaporized into low-molecular-weight gases such as hydrogen, oxygen, carbon dioxide, nitrogen, and methane, forming a cutting and ablation effect at low temperatures.

[0003] In related technologies, a high-frequency electric knife cannot provide deionized water and cannot be used as a plasma knife. A plasma knife does not have a smoke suction device and needs to be equipped with a smoke suction device when used as a high-frequency electric knife. Therefore, the conventional electric knife has a single power supply and cannot meet the needs of electrosurgical instruments in complex surgical operations. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide an electrosurgical pencil and an electrosurgical system that have wide applicability, diverse functions, and convenient operation.

[0005] An electrosurgical pencil, comprising:

[0006] a housing;

[0007] a blade bar mounted inside the housing, the blade bar comprising opposite distal and proximal ends, the distal end being configured to mount an electrode assembly, the blade bar further comprising a blade bar cavity communicating between the distal and proximal ends;

[0008] a conduit assembly selectively communicating with the blade bar cavity, the conduit assembly comprising a first conduit and a second conduit; and

[0009] a switching valve disposed between the conduit assembly and the proximal end of the blade bar, the switching valve being configured to communicate one of the first conduit and the second conduit with the blade bar cavity.

[0010] In one embodiment, the switching valve comprises:

[0011] a valve body connected between the conduit assembly and the proximal end of the blade bar; and

[0012] a switching member movably disposed in the valve body, the switching member having a switching passage therein communicating with an outside through the valve body;

[0013] wherein, when the switching member is in a first position, the switching passage communicates the first conduit with the blade bar cavity; when the switching member is in a second position, the switching passage communicates the second conduit with the blade bar cavity; and when the switching member is in a third position, the switching member seals the blade bar cavity at the proximal end.

[0014] In one embodiment, the blade bar, the first conduit and the second conduit are spaced apart on the valve body, the switching passage forms at least first and second ports on a surface of the switching member, the spacing between the first and second ports is equal to the spacing between the blade bar and the first conduit, and the spacing between the first and second ports is equal to the spacing between the blade bar and the second conduit.

[0015] In one embodiment, at least a portion of the switching member is cylindrical or spherical, and the switching member is rotatable relative to the valve body to switch between the first position, the second position and the third position.

[0016] In one embodiment, the switching member is provided with an indicating portion configured to indicate at least one of the first position, the second position and the third position.

[0017] In one of the embodiments, the valve body is provided with a first interface pipe, a second interface pipe and a third interface pipe extending radially, the first interface pipe is used for cooperating with the cutter bar cavity, the second interface pipe is used for detachably connecting with the first pipe, and the third interface pipe is used for detachably connecting with the second pipe.

[0018] In one of the embodiments, the electrosurgical pencil further comprises an electrode assembly, the electrode assembly comprises an electrode head and an electrode seat, the electrode head is installed on the electrode seat, and the electrode seat is detachably connected with the distal end.

[0019] In one of the embodiments, the cutter bar comprises:

[0020] an inner pipe forming the cutter bar cavity; and

[0021] an outer pipe covering the inner pipe, the outer pipe is made of insulating material.

[0022] In one of the embodiments, the first pipe is used for connecting a liquid supply pump, and the second pipe is used for connecting a smoke suction pump.

[0023] An electrosurgical system comprises:

[0024] a power supply device comprising one of a high-frequency power supply and a plasma source; and

[0025] The electrosurgical pencil as described above is provided with a wiring part for connecting the power supply device.

[0026] When the power supply device is the plasma source, the switching valve is used for making the first pipe communicate with the cutter bar cavity; when the power supply device is the high-frequency power supply, the switching valve is used for making the second pipe communicate with the cutter bar cavity.

[0027] The electrosurgical pencil as described above realizes the first pipe and the second pipe to be in communication or not in communication with the cutter bar cavity alternatively through the switching valve, the first pipe and the second pipe are connected with different devices respectively to realize different functions, the functions corresponding to different pipes are switched through the switching valve, the switching is realized through single action of a single component, and the switching is convenient and fast; the pipes with different functions are switched, and the electrosurgical pencil is suitable for electrosurgical pencils of different principles, i.e., the pencil structure is suitable for both high-frequency electrosurgical pencils and plasma electrosurgical pencils; the first pipe and the second pipe are converged in the cutter bar cavity, different functions share the cutter bar cavity in the cutter bar through the switching valve, and the pencil structure is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is an exploded structural schematic view of the electrosurgical pencil in one of the embodiments of the present application.

[0029] Figure 2 Part structure schematic diagram of the electrosurgical pencil in an embodiment of the present application.

[0030] Figure 3 Part structure schematic diagram of the electrosurgical pencil in an embodiment of the present application.

[0031] Figure 4 Liquid supply passage communication schematic diagram of the three-port switching valve in an embodiment of the present application.

[0032] Figure 5 Exhaust passage communication schematic diagram of the three-port switching valve in an embodiment of the present application.

[0033] Figure 6 Exhaust passage communication schematic diagram of the two-port switching valve in an embodiment of the present application, wherein the left drawing is an exhaust passage communication schematic diagram, and the right drawing is a liquid supply passage communication schematic diagram.

[0034] Figure 7 Structure schematic diagram of the switching valve in an embodiment of the present application.

[0035] BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 1, electrosurgical pencil; 11, distal end; 12, proximal end; 100, shell; 110, button; 120, wiring part; 130, control assembly; 140, variable-diameter sleeve; 200, blade rod; 201, blade rod cavity; 210, outer tube; 220, inner tube; 300, pipeline assembly; 310, first pipeline; 320, second pipeline; 400, switching valve; 401, switching passage; 402, first port; 403, second port; 410, valve main body; 411, first interface tube; 412, second interface tube; 413, third interface tube; 420, switching piece; 421, rotating part; 422, operating part; 423, indicating part; 500, electrode assembly; 510, electrode head; 520, electrode seat. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0038] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0039] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0041] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a layer is referred to as being "connected", "coupled", or "adjacent" to another element, it can be directly connected, coupled, or adjacent to the other element, or intervening elements can also be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "exemplary" means "an example of." As used herein, the term "about" means approximately or nearly as understood by one of ordinary skill in the art. The term "comprising" as used herein is synonymous with "including", "containing", or "comprising", and is inclusive or open-ended and does not exclude additional, unrecited elements or method steps. As used herein, the term "consisting of" excludes any element not specified. As used herein, the term "consisting essentially of" excludes any element not specified, but does include elements that affect the basic and novel characteristics of the composition or method. As used herein, the term "horizontal" refers to a direction that is parallel to the plane of the substrate. As used herein, the term "vertical" refers to a direction that is perpendicular to the plane of the substrate.

[0043] Referring to Figures 1-7 , Figures 1-7 A schematic diagram of an electrosurgical pencil 1 according to an embodiment of the present application is shown. The electrosurgical pencil 1 according to an embodiment of the present application comprises a housing 100, a blade 200, a conduit assembly 300, and a switching valve 400.

[0044] The blade 200 is mounted inside the housing 100. The blade 200 comprises a distal end 11 and a proximal end 12. The distal end 11 is configured to mount an electrode assembly 500. The blade 200 further comprises a blade cavity 201 that is in communication between the distal end 11 and the proximal end 12. The conduit assembly 300 is in selective communication with the blade cavity 201 and comprises a first conduit 310 and a second conduit 320. The switching valve 400 is disposed between the conduit assembly 300 and the proximal end 12 of the blade 200 and is configured to selectively communicate one of the first conduit 310 and the second conduit 320 with the blade cavity 201.

[0045] The electrosurgical pencil 1 described above allows selective communication of the first conduit 310 and the second conduit 320 with the blade cavity 201 by the switching valve 400. The first conduit 310 and the second conduit 320 are connected to different devices to perform different functions. The switching valve 400 is used to switch between the functions of the different conduits. The switching is achieved by a single action of a single component, which is convenient and fast. The switching between the conduits with different functions is suitable for electrosurgical pencils 1 of different principles, i.e. the pencil structure is suitable for both a high-frequency electrosurgical pencil and a plasma pencil. The first conduit 310 and the second conduit 320 are merged in the blade cavity 201, and the switching valve 400 is used to allow the different functions to share the blade cavity 201 in the blade 200, which simplifies the structure of the pencil.

[0046] The housing 100 forms a cavity in which the blade rod 200 is accommodated, or the blade rod 200 can pass through the housing 100, and the end of the housing 100 can fix the blade rod 200. The switching valve 400 can be connected to the part of the blade rod 200 located in the housing 100, or the part of the blade rod 200 located outside the housing 100. When the switching valve 400 is connected to the part of the blade rod 200 located in the housing 100, the housing 100 is provided with a space for accommodating the switching valve 400, and / or a through hole through which the switching valve 400 and the pipe assembly 300 pass.

[0047] The housing 100 is provided with a button 110 for controlling the start and stop of the electrosurgical pencil 1, and / or for controlling the switching function of the switching valve 400 of the electrosurgical pencil 1, i.e. for controlling the switching valve 400 to realize the communication of one of the first pipe 310 and the second pipe 320 with the blade rod cavity 201.

[0048] In one embodiment, the first pipe 310 is used to connect a liquid supply pump, and the second pipe 320 is used to connect a smoke suction pump.

[0049] As shown in Figures 1-3 The first pipe 310 is connected to the switching valve 400 at one end and to an external liquid supply pump at the other end, and the liquid supply pump provides a predetermined liquid substance into the inside of the electrosurgical pencil 1. In addition, a container for storing the predetermined liquid substance, such as physiological saline, can be further included, and the container is connected between the liquid supply pump and the first pipe 310. When the switching valve 400 communicates the blade rod cavity 201 with the first pipe 310, the blade rod cavity 201 and the first pipe 310 constitute a liquid supply passage.

[0050] The second pipe 320 is connected to the switching valve 400 at one end and to an external smoke suction pump at the other end, and the smoke suction pump extracts a gas substance from the inside of the electrosurgical pencil 1 to the outside, and the gas substance is a mixed gas including but not limited to hydrogen, oxygen, carbon dioxide, nitrogen, and methane. In addition, a container for storing the gas substance can be further included, and the container is connected between the smoke suction pump and the first pipe 310. When the switching valve 400 communicates the blade rod cavity 201 with the second pipe 320, the blade rod cavity 201 and the second pipe 320 constitute a smoke exhaust passage. The blade rod cavity 201 realizes the multiplexing of the liquid supply passage and the smoke exhaust passage through the switching valve 400.

[0051] As shown in Figures 4-7As shown, the switching valve 400 can be a mechanical switching structure or an electromagnetic switching structure. In one embodiment, the switching valve 400 includes: a valve body 410 connected between the pipe assembly 300 and the proximal end 12 of the knife bar 200; and a switching element 420 movably disposed in the valve body 410, wherein the switching element 420 has a switching channel 401 communicating with the outside through the valve body 410; wherein, when the switching element 420 is in the first position, such as Figure 4 or Figure 6 As shown on the right, the switching channel 401 connects the first pipe 310 and the tool holder cavity 201; when the switching element 420 is in the second position, as... Figure 5 or Figure 6 As shown on the left, the switching channel 401 connects the second pipe 320 and the tool holder cavity 201; when the switching element 420 is in the third position, the switching element 420 closes the tool holder cavity 201 at the proximal end 12.

[0052] When the switching valve 400 is a mechanical switching structure, the switching element 420 is operated by the user through mechanical transmission or directly. When the switching valve 400 is an electromagnetic switching structure, the switching element 420 is operated by a driving element, which is controlled by a command signal.

[0053] Specifically, the valve body 410 provides a cavity for accommodating the switching element 420 and a channel for communicating the switching element 420 with the piping assembly 300. The valve body 410 surrounds the periphery of the switching element 420 and at least encloses a portion of the structure of the switching element 420; in this embodiment, the valve body 410 at least encloses the side of the switching element 420. The portion of the switching element 420 protruding from the valve body 410 allows the valve body 410 to be operated externally.

[0054] The switching valve 400 is also used to prevent both the first pipe 310 and the second pipe 320 from communicating with the tool holder cavity 201. For example... Figures 4-6 As shown, when the switch 420 is in the first position and the second position, the electrosurgical scalpel pen 1 is in the external function connected state. The connected state includes the first function corresponding to the first position and the second function corresponding to the second position. When the switch 420 is in the third position, the electrosurgical scalpel pen 1 is in the external function closed state.

[0055] In some other embodiments, the electrosurgical pen 1 may not include the tubing assembly 300, or the tubing assembly 300 may be an optional accessory for the electrosurgical pen 1.

[0056] In one embodiment, the blade 200, the first conduit 310, and the second conduit 320 are connected to the valve body 410 at intervals. The switching channel 401 forms at least a first port 402 and a second port 403 at intervals on the surface of the switching member 420. The interval between the first port 402 and the second port 403 is equal to the interval between the blade 200 and the first conduit 310, and the interval between the first port 402 and the second port 403 is equal to the interval between the blade 200 and the second conduit 320.

[0057] Specifically, such as Figures 4-6 As shown, a through switching channel 401 is formed inside the valve body 410. The switching channel 401 forms at least one spaced first port 402 and a second port 403 on the surface of the switching element 420. Simultaneously, through holes communicating with the blade cavity 201, the first pipe 310, and the second pipe 320 are respectively provided on the valve body 410. When the switching element 420 is in the first position, the switching channel 401 connects the first pipe 310 and the blade cavity 201, with the first port 402 and the second port 403 respectively connecting to the first pipe 310 and the blade cavity 201. When the switching element 420 is in the second position, the switching channel 401 connects the second pipe 320 and the blade cavity 201, with the first port 402 and the second port 403 respectively connecting to the blade cavity 201 and the second pipe 320. When the switching element 420 is in the third position, the switching element 420 closes the knife bar cavity 201 at the proximal end 12, and the positions of the first port 402 and the second port 403 match the wall surface of the valve body 410 without abutting the aforementioned through hole.

[0058] Furthermore, the switching channel 401 forms a bend inside the switching member 420, such that both the first port 402 and the second port 403 are located on the surface of the switching member 420. The bending angle is related to the interval; preferably, the bending angle is 90°, and the switching channel 401 has an L-shaped cross-section. In other embodiments, the switching channel 401 can also be arc-shaped, irregularly shaped, or other shapes.

[0059] In other embodiments, the switching channel 401 forms at least a first port 402, a second port 403, and a third port spaced apart on the surface of the switching member 420. The switching channel 401 is Y-shaped, and at a certain position, the first port 402, the second port 403, and the third port can all connect to the tool holder cavity 201, the first pipe 310, and the second pipe 320.

[0060] In one embodiment, at least a portion of the switching element 420 is cylindrical or spherical, and the switching element 420 is rotatable relative to the valve body 410 to switch between the first position, the second position, and the third position.

[0061] The switching member 420 comprises a rotating part 421 located inside the valve body 410 and an operating part 422 located outside the valve body 410, the rotating part 421 is cylindrical or spherical, the switching channel 401, the first port 402 and the second port 403 are formed on the rotating part 421, and the operating part 422 is exposed from the valve body 410 for being operated by a user. When the rotating part 421 is cylindrical or spherical, the switching channel 401 is located at the central axis or the center of the cylinder or sphere at the bending part inside the switching member 420. Further, the rotating part 421 and the operating part 422 can be integrally formed.

[0062] The first port 402 and the second port 403 are located at different positions on the outer circumferential surface of the rotating part 421, and the interval between the first port 402 and the second port 403 is an arc connection. As preferred, the first port 402 and the second port 403 are located at different positions on the same circumference of the same horizontal plane.

[0063] The valve body 410 provides a cavity for accommodating the switching member 420, and the cavity has an opening, and the part of the switching member 420 extending out of the opening is the operating part 422. The diameter of the operating part 422 is greater than the diameter of the opening, so that the operating part 422 is clamped on the edge of the opening.

[0064] In one embodiment, as shown in Figure 7 The switching member 420 is provided with an indicating part 423 for indicating at least one of the first position, the second position and the third position.

[0065] Specifically, the indicating part 423 is located on the operating part 422, the indicating part 423 is an indicating mark protruding from the edge of the operating part 422, and / or the indicating part 423 is a mark provided on the surface of the operating part 422. The indicating part 423 corresponds to the positions of the first port 402 and the second port 403 inside the switching member 420, and the indicating part 423 also includes a part indicating that the switching channel 401 is in a non-communication position, and the indicating part 423 is used to indicate that the switching member 420 is located in the first position, the second position and the third position. Preferably, the indicating part 423 corresponding to each port or state has different identification shapes and patterns.

[0066] In one embodiment, the valve body 410 is provided with a first interface pipe 411, a second interface pipe 412 and a third interface pipe 413 extending radially, the first interface pipe 411 is used for cooperating with the tool bar cavity 201, the second interface pipe 412 is used for being detachably connected with the first pipe 310, and the third interface pipe 413 is used for being detachably connected with the second pipe 320.

[0067] The first interface pipe 411, the second interface pipe 412 and the third interface pipe 413 are pipes extending outwardly from the valve body 410 along a radial direction, and the structures of the first interface pipe 411, the second interface pipe 412 and the third interface pipe 413 are adapted to the objects to be connected. One end of the first interface pipe 411 penetrates into the valve body 410 and can be aligned with the first port 402 or the second port 403 of the switching piece 420, and the other end of the first interface pipe 411 is detachably connected with the shell 100 and is connected with the tool bar cavity 201 through the cavity in the shell 100. One end of the second interface pipe 412 penetrates into the valve body 410 and can be aligned with the first port 402 or the second port 403 of the switching piece 420, and the other end of the second interface pipe 412 is detachably connected with one end of the first pipe 310. One end of the third interface pipe 413 penetrates into the valve body 410 and can be aligned with the first port 402 or the second port 403 of the switching piece 420, and the other end of the third interface pipe 413 is detachably connected with one end of the second pipe 320.

[0068] A reducing sleeve 140 is arranged at the connection between the first interface pipe 411 and the shell 100, and the reducing sleeve 140 has a small-diameter end and a large-diameter end, the small-diameter end is arranged in the shell 100, the large-diameter end is sleeved on the outside of the first interface pipe 411, and the reducing sleeve 140 is in communication with the tool bar cavity 201 and the first interface pipe 411. At least one of the first interface pipe 411, the second interface pipe 412 and the third interface pipe 413 is a quick-release pipe joint.

[0069] In one embodiment, the electrosurgical pencil 1 further comprises an electrode assembly 500, which comprises an electrode head 510 and an electrode holder 520, the electrode head 510 is mounted on the electrode holder 520, and the electrode holder 520 is detachably connected with the distal end 11.

[0070] Specifically, the electrode head 510 can be of the following types: a knife-shaped electrode head, a needle-shaped electrode head, a spherical electrode head, a ring-shaped tungsten wire electrode head, a triangular tungsten wire electrode head, and the like, and of course other types of electrode heads. The electrode assembly 500 of the present embodiment is detachably connected with the tool bar 200, and the electrode holder 520 is arranged at the distal end 11 of the tool bar 200, i.e. the electrode head 510 is connected with the distal end 11 of the tool bar 200 and can be detached from the electrosurgical pencil 1. Therefore, when the doctor needs to use an electrode head 510 of a different shape, the doctor only needs to detach the electrode assembly 500 from the tool bar 200 and replace it with the desired electrode head structure. At the same time, since a liquid suction channel and a smoke suction channel need to be formed inside the electrosurgical pencil 1, the electrode head 510 and the electrode holder 520 are hollow structures and are in communication with the tool bar cavity 201. The electrode head 510 and the electrode holder 520 are integrally formed or detachably connected, and when integrally formed, the electrode head 510 and the electrode holder 520 are made of the same material.

[0071] The electrode assembly 500 further comprises a knob and a sealing ring. In some embodiments, the knob is rotatably connected with the blade rod 200, and an integral structure is detachably connected with the rod assembly through the knob. By rotating the knob, the electrode seat 520 is separated from or combined with the guide rod. The electrode head 510 and the electrode seat 520 can be connected as an integral structure. A sealing ring is arranged between the knob and the rod assembly, which is used for waterproofing to prevent water from entering the shell 100 from the gap between the knob and the blade rod 200, thereby preventing the control assembly 130 from short-circuiting.

[0072] In one of the embodiments, the blade rod 200 comprises an inner tube 220 forming the blade rod cavity 201, and an outer tube 210 covering the inner tube 220, which is made of an insulating material. Specifically, one end of the inner tube 220 is connected with the first interface tube 411, especially through the variable-diameter sleeve 140, and the other end of the inner tube 220 is connected with the electrode assembly 500. The outer tube 210 is arranged to completely cover the inner tube 220, and the outer tube 210 and the inner tube 220. Preferably, the outer tube 210 is made of plastic material, which can be a rubber sleeve or a thermoplastic film. Smoke / water is transmitted through the path of the first interface tube 411, the blade rod cavity 201 of the inner tube 220, and the electrode assembly 500 (specifically the electrode head 510).

[0073] An embodiment of the present application further comprises an electrosurgical system, which comprises: a power supply device comprising one of a high-frequency power supply and a plasma source; and the electrosurgical pencil 1 as described above, wherein the electrosurgical pencil 1 is provided with a wiring part 120 for connecting the power supply device; when the power supply device is the plasma source, the switching valve 400 is used to make the first pipe 310 communicate with the blade rod cavity 201; and when the power supply device is the high-frequency power supply, the switching valve 400 is used to make the second pipe 320 communicate with the blade rod cavity 201.

[0074] The surgical system using the electrosurgical pencil 1 described above realizes different functions through the switching valve 400, the first pipe 310 and the second pipe 320 connecting different power supply devices respectively, and realizes the functions of the high-frequency electrotome and the plasma pencil through the switching of the switching valve 400 to select the functions corresponding to different pipes, which realizes the switching through a single action of a single component. The system realizes the functions of the high-frequency electrotome and the plasma pencil, and the function switching is convenient. The first pipe 310 and the second pipe 320 are respectively connected with the blade rod cavity 201, so that different functions share the blade rod cavity 201 in the blade rod 200, and the structure of the system is simplified.

[0075] The connecting part 120 is led out from the shell 100, and the connecting part 120 includes a plug at an end, which is used to connect the energy supply interface of the energy supply device. The high-frequency power supply and the plasma source are high-frequency electrosurgical energy platforms and plasma devices, respectively. The shell 100 is provided with a control assembly 130, which can be used to control the start and stop of the electrosurgical pencil 1, the operation of the electrode assembly 500, and the operation of the switching valve 400.

[0076] The plug is inserted at one end into the energy supply interface of the high-frequency electrosurgical energy platform or the plasma device energy platform, and at the other end is electrically connected to the circuit board of the control assembly 130, which is in conductive contact with the inner tube 220, which is in conductive contact with the electrode head 510, thereby completing the transmission of electric energy. When smoke needs to be discharged, the electrosurgical pencil 1 is used as a high-frequency electrotome, the plug is inserted into the energy supply interface of the high-frequency electrosurgical energy platform, the switching piece 420 of the switching valve 400 is moved to the second position, and a smoke discharge channel is formed. When liquid needs to be supplied, the electrosurgical pencil 1 is used as a plasma pencil, the plug is inserted into the energy supply interface of the plasma device, the switching piece 420 of the switching valve 400 is moved to the first position, and a liquid supply channel is formed.

[0077] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0078] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An electrosurgical pencil, characterized in that, The electrosurgical pencil comprises: a housing; a blade rod mounted inside the housing, the blade rod comprising opposite distal and proximal ends, the distal end being configured to mount an electrode assembly, the blade rod further comprising a blade rod cavity communicating between the distal and proximal ends; a pipe assembly selectively communicating with the blade rod cavity, the pipe assembly comprising a first pipe and a second pipe; and a switching valve disposed between the pipe assembly and the proximal end of the blade rod, the switching valve being configured to communicate one of the first pipe and the second pipe with the blade rod cavity.

2. The electrosurgical pencil of claim 1, wherein, The switching valve comprises: a valve body connected between the pipe assembly and the proximal end of the blade rod; and a switching member movably disposed in the valve body, the switching member having a switching passage therein communicating with an outside through the valve body; wherein the switching passage communicates the first pipe with the blade rod cavity when the switching member is in a first position, the switching passage communicates the second pipe with the blade rod cavity when the switching member is in a second position, and the switching member seals the blade rod cavity at the proximal end when the switching member is in a third position.

3. The electrosurgical pencil of claim 2, wherein, The blade rod, the first pipe and the second pipe are spacedly connected to the valve body, the switching passage forms at least first and second ports spacedly on a surface of the switching member, the spacing of the first and second ports being equal to the spacing of the blade rod and the first pipe, and the spacing of the first and second ports being equal to the spacing of the blade rod and the second pipe.

4. The electrosurgical pencil of claim 2 or 3, wherein, At least a portion of the switching member is cylindrical or spherical, and the switching member is rotatable relative to the valve body to switch between the first, second and third positions.

5. The electrosurgical pencil of claim 2 or 3, wherein, The switching member is provided with an indicating portion for indicating at least one of the first, second and third positions.

6. The electrosurgical pencil of claim 2 or 3, wherein, The valve body is provided with first, second and third interface tubes extending radially therefrom, the first interface tube being configured to cooperate with the blade rod cavity, the second interface tube being configured to detachably connect with the first pipe, and the third interface tube being configured to detachably connect with the second pipe.

7. The electrosurgical pencil of claim 1, wherein, The electrosurgical pencil further comprises an electrode assembly, the electrode assembly comprising an electrode head and an electrode holder, the electrode head being mounted to the electrode holder, and the electrode holder being detachably connected with the distal end.

8. The electrosurgical pencil of claim 1, wherein, The blade rod comprises: an inner tube forming the blade rod cavity; and an outer tube covering the inner tube, the outer tube being made of an insulating material.

9. The electrosurgical pencil of claim 1, wherein, The first pipe is configured to connect with a liquid supply pump, and the second pipe is configured to connect with a smoke suction pump.

10. An electrosurgical system, comprising: The electrosurgical pencil comprises: a power supply device comprising one of a high-frequency power supply and a plasma source; and the electrosurgical pencil according to any one of claims 1-9 is provided with a wiring portion configured to connect with the power supply device; when the power supply device is the plasma source, the switching valve is configured to communicate the first pipe with the blade rod cavity, and when the power supply device is the high-frequency power supply, the switching valve is configured to communicate the second pipe with the blade rod cavity. wherein, ​

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