A multi-functional electrosurgical unit with adjustable length for water injection

Abstract

This utility model discloses a multi-functional electrosurgical unit with adjustable length and water injection capability. The distal end of the delivery tube is fixedly connected to the I-blade body via a connecting tube, and the proximal end of the delivery tube is fixed to the main handle. The proximal end of the O-blade body is fixedly connected to the distal end of the inner sheath tube, which is sleeved outside the delivery tube. The proximal end of the inner sheath tube is fixedly connected to the inner sheath handle, and the outer sheath tube is sleeved outside the inner sheath tube. The distal end of the outer sheath tube is limited by a ceramic head, and the proximal end of the outer sheath tube is fixedly connected to the outer sheath handle. The relative positions of the outer sheath handle and the main handle can be moved to adjust the overall blade extension length. The relative positions of the inner and outer sheath handles can also be moved to switch between the O-blade and I-blade functions. This solution can meet the surgeon's needs for different electrosurgical unit lengths during surgery and provide multiple functions in a single electrosurgical unit.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a water-injection multifunctional electrosurgical unit with adjustable length. Background Technology

[0002] Common electrosurgical devices used for ESD on the market include needle knives, IT knives (with ceramic tips), hook knives, triangular knives, and Flush knives (with flushing holes in the tip). Each type of knife has its own characteristics: the rod-shaped electrode of the needle knife can quickly mark and cut the mucosa; the IT knife tip is protected by a ceramic insulator to prevent cutting unnecessary areas when peeling off the mucosal layer, thus preventing perforation and bleeding; the L-shaped tip of the hook knife can be rotated to a suitable angle to quickly cut the edge of the lesion; the three-lobed radial electrode of the triangular knife is beneficial for marking and cauterizing bleeding points for hemostasis; the Flush knife tip has flushing holes to rinse bleeding points during the operation and improve the field of vision.

[0003] During endoscopic submucosal dissection, the surgeon involves multiple steps and instruments. These include injecting saline solution to elevate the lesion, marking points with a needle knife or triangular knife, cutting along the marked edges with a hook knife or needle knife, dissecting the tissue with an IT knife (with a ceramic tip), and cauterizing bleeding points to stop bleeding. The surgeon will change instruments as needed during the procedure. Frequent instrument changes are tedious and time-consuming, which is detrimental to the patient's recovery. Furthermore, during mucosal dissection, the electrocautery knife requires selecting different blade lengths depending on the location, thickness, and elevation of the tissue being dissected, as well as the surgeon's preferred technique.

[0004] Patent document CN108523986A discloses a high-frequency endoscopic knife with an injection needle, comprising a vertical injection connector, a double-finger ring, a handle, a connector, a slider, an outer sheath, a hollow tube, a needle tube, an axial electrode, an insulating head, a radial electrode, a spring hose, and a steel cable. The spring hose and outer sheath are both fixedly connected to the handle. The needle tube and axial electrode are both housed within the spring hose. The vertical injection connector is slidably mounted on the handle. The connector is mounted on the double-finger ring. The slider is housed within the handle, with the connector and slider having an interference fit. The double-finger ring is slidably mounted on the handle. The hollow tube is inserted into the slider. The needle tube passes through the hollow tube and connects to the vertical injection connector to form a liquid channel. The distal end of the hollow tube is fixed to one end of the steel cable, and the other end of the steel cable is fixed to the axial electrode via an axial electrode connector. This device integrates the functions of an IT knife and an injection needle, reducing instrument change time and effort, and is more efficient and safer. However, the overall blade extension length is not adjustable.

[0005] Patent document CN111658128A discloses a multifunctional high-frequency cutting tool, including a head assembly and a handle assembly. The rear end of an outer sheath on the head assembly is connected to a first handle, and a spring tube passes through the outer sheath. An injection tube passes through the spring tube and is fixedly connected to a second handle. The second handle moves back and forth, causing the injection tube to move back and forth as well. A conductive seat passes through the front of the outer sheath, and the front end of the spring tube is fixedly connected to the conductive seat. The rear end of the spring tube is connected to a connector on an electrode base. An O-blade, with an inner cavity, also passes through the front of the outer sheath and communicates with the injection tube. The injection tube moves back and forth, causing the O-blade to extend and retract from the front end of the outer sheath. This high-frequency cutting tool integrates cutting, marking, electrocoagulation, and liquid spraying functions into one, allowing doctors to perform corresponding operations as needed, saving time on instrument changes and improving surgical efficiency. However, the overall blade extension length is not adjustable.

[0006] Patent document CN219147890U discloses a multifunctional high-frequency surgical instrument for endoscopy, including a handle and a double-finger ring handle that slides with it. The upper end of the inner catheter of the handle can be electrically connected or pass through to the electrode and water injection connector at the lower end of the handle. The lower end of the handle is connected to an elastic tube assembly through a connecting component. The lower part of the tube assembly slides with a flushing connector that is fixed to the bottom of the outer sheath. The lower end of the tube assembly passes through the flushing connector and the outer sheath and is connected to a type I blade. The type I blade is fitted with an O-type blade. The upper end of the O-type blade is connected to the tube assembly and has a radial electrode and an insulating head at the bottom. The inner cavity and circuit of the catheter, tube assembly, and type I blade can realize injection and I-blade marking, cutting, or electrocoagulation functions, respectively. The circuit of the electrode, catheter, tube assembly, O-type blade, and radial electrode can realize O-blade cutting or electrocoagulation functions. The water injection channel between the flushing connector, the central hole of the outer sheath, and the tube assembly can realize the flushing function, reducing the frequency of instrument replacement. However, the overall blade extension length is not adjustable. Summary of the Invention

[0007] To address the technical problem that existing electrosurgical units can only provide electrosurgical heads of fixed length, the purpose of this invention is to provide a multi-functional electrosurgical unit with adjustable length that can be injected with water, so as to meet the doctor's needs for different electrosurgical head lengths during surgery and to provide multiple functions in one electrosurgical unit.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An adjustable-length water-filled multifunctional electrosurgical unit includes an I-blade body, a ceramic head, a radial electrode, an O-blade body, an outer sheath, an inner sheath, a connecting tube, a delivery tube, an outer sheath handle, an inner sheath handle, and a main handle. The distal end of the delivery tube is fixedly connected to the I-blade body via the connecting tube, and the proximal end of the delivery tube is fixed to the main handle. The O-blade body is fitted over the I-blade body. The distal end of the O-blade body is fixedly fitted with the ceramic head and the radial electrode and is limited by the distal end of the I-blade body. The proximal end of the O-blade body is fixedly connected to the distal end of the inner sheath. The inner sheath is fitted over the delivery tube, and the proximal end of the inner sheath is fixedly connected to the inner sheath handle. The outer sheath is fitted over the inner sheath, and the distal end of the outer sheath is limited by the ceramic head. The proximal end of the outer sheath is fixedly connected to the outer sheath handle. The relative positions of the outer sheath handle and the main handle can be moved to change, thereby adjusting the overall blade extension length. The relative positions of the inner sheath handle and the outer sheath handle can be moved to change, thereby enabling the conversion between the O-blade and the I-blade.

[0010] Preferably, the I-blade body has a hollow structure, with the central hole of the I-blade body connected to the tube hole of the delivery tube, and the delivery tube connected to the Luer connector on the main handle, thereby enabling injection.

[0011] Preferably, the outer sheath handle and the main handle are connected by threaded fit, interference fit, or concave-convex stop fit to achieve a connection that can both adjust the relative position and fix the relative position.

[0012] Preferably, the inner sheath handle is provided with a limiting buckle. The limiting buckle is used to restrict the relative movement between the inner sheath handle and the outer sheath handle by interference fit with the outer sheath handle or by clamping the limiting buckle on the outer sheath handle, thereby maintaining the working state of O-blade extension or I-blade extension.

[0013] Preferably, the main handle is provided with an electrode, which is fixedly connected to the proximal end of the delivery tube. The delivery tube is made of conductive material, so that the blade body can be energized.

[0014] Preferably, the main handle has a scale marking indicating the length of the blade extension at the connection point with the outer sheath handle.

[0015] Preferably, the ceramic head and the O-blade body are fixedly connected by a radial electrode.

[0016] Preferably, the proximal end of the O-blade body is fixedly connected to the distal end of the inner sheath via a ceramic pad.

[0017] Preferably, the outer sheath handle is sleeved over the inner sheath handle, and the outer sheath handle has an opening to expose the inner sheath handle. The limiting buckle is a flat clip structure, which clamps the outer sheath handle and the inner sheath handle to fix them in place.

[0018] This utility model, employing the above-mentioned technical solution, comprises an insertion part for intervention into the patient's body, consisting of an I-blade body, an O-blade body, an outer sheath, an inner sheath, a connecting tube, and a delivery tube. When energized, this insertion part is controlled by a handle to perform functions such as injection, marking, and electrocautery. The handle part, composed of an outer sheath handle, an inner sheath handle, and a main handle, allows adjustment of the overall blade extension length of both the I-blade and O-blade bodies by adjusting the position between the outer sheath handle and the main handle, thus adjusting the relative movement of the outer sheath and the blade head. Similarly, adjusting the relative position between the inner and outer sheath handles allows adjustment of the relative movement of the O-blade and I-blade bodies, enabling the extension of either the I-blade or O-blade body. A limiting latch restricts the movement of the inner sheath handle, ensuring that the I-blade does not extend when the O-blade is extended, or vice versa. Therefore, this electrosurgical unit not only offers an adjustable overall blade extension length to meet the surgeon's needs for different blade lengths during surgery, but also provides multiple functions with a single unit, reducing instrument change time and effort and improving surgical efficiency. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention (sectional view, enlarged distal portion).

[0021] Figure 2 This is a schematic diagram of the structure of this utility model (enlarged handle portion).

[0022] Figure 3 This is a perspective view of the present invention.

[0023] Figure 4 This is a schematic diagram showing the blade of this utility model extending 3mm.

[0024] Figure 5 This is a schematic diagram showing the O-blade of this utility model extending 3mm.

[0025] Figure 6 This is a cross-sectional view of the O-blade of this utility model protruding.

[0026] The components are as follows: 1. I-blade body; 2. Ceramic head; 3. Radial electrode; 4. O-blade body; 5. Outer sheath; 6. Ceramic pad; 7. Inner sheath; 8. Connecting tube; 9. Delivery tube; 10. Outer sheath handle; 11. Inner sheath handle; 12. Limiting buckle; 13. Main handle; 14. Electrode; 15. Luer connector. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Example 1:

[0036] like Figures 1 to 3 The diagram shows a multi-functional electrosurgical unit with adjustable length and water injection capability, comprising an I-blade body 1, a ceramic head 2, a radial electrode 3, an O-blade body 4, an outer sheath tube 5, an inner sheath tube 7, a connecting tube 8, a delivery tube 9, an outer sheath handle 10, an inner sheath handle 11, and a main handle 13. The distal end of the delivery tube 9 is fixedly connected to the I-blade body 1 via the connecting tube 8, and the proximal end of the delivery tube 9 is fixed to the main handle 13. The O-blade body 4 is sleeved outside the I-blade body 1, and the distal end of the O-blade body 4 is fixedly fitted with the ceramic head 2 and the radial electrode 3 and is limited by the distal end of the I-blade body 1. The proximal end of the blade body 4 is fixedly connected to the distal end of the inner sheath tube 7. The inner sheath tube 7 is sleeved outside the delivery tube 9. The proximal end of the inner sheath tube 7 is fixedly connected to the inner sheath handle 11. The outer sheath tube 5 is sleeved outside the inner sheath tube 7. The distal end of the outer sheath tube 5 is limited by the ceramic head 2. The proximal end of the outer sheath tube 5 is fixedly connected to the outer sheath handle 10. The relative position of the outer sheath handle 10 and the main handle 13 can be moved and changed to adjust the overall blade extension length. The relative position of the inner sheath handle 11 and the outer sheath handle 10 can be moved and changed to realize the conversion between O-blade and I-blade.

[0037] Thus, the insertion unit, consisting of the I-blade body, O-blade body, outer sheath, inner sheath, connecting tube, and delivery tube, is inserted into the patient's body. When energized, this insertion unit is controlled by the handle to perform functions such as injection, marking, and electrocautery. The handle unit, composed of the outer sheath handle, inner sheath handle, and main handle, allows adjustment of the overall blade extension length of both the I-blade and O-blade bodies by adjusting the position between the outer sheath handle and the main handle, thus adjusting the relative movement between the outer sheath and the blade head. Similarly, adjusting the relative position between the inner and outer sheath handles allows adjustment of the relative movement between the O-blade and I-blade bodies, enabling the extension of either the I-blade or O-blade body. A limiting latch restricts the movement of the inner sheath handle, ensuring that the I-blade does not extend when the O-blade is extended, or vice versa. Therefore, this electrosurgical unit not only offers adjustable overall blade extension length to meet the surgeon's needs for different blade lengths during surgery, but also provides multiple functions with a single unit, reducing instrument change time and effort and improving surgical efficiency.

[0038] In this preferred embodiment, such as Figure 1 As shown, the blade body 1 is a hollow structure. The central hole of the blade body 1 is connected to the pipe hole of the delivery pipe 9. The delivery pipe 9 is connected to the Luer connector 15 on the main handle 13, thereby enabling water injection.

[0039] In this preferred embodiment, the outer sheath handle 10 and the main body handle 13 are connected by a threaded fit, an interference fit, or a concave-convex stop fit, so that the two can be moved to adjust their position and can also be fixed.

[0040] In this preferred embodiment, such as Figures 4 to 6 As shown, the inner sheath handle 11 moves back and forth within the outer sheath handle 10, causing the O-blade body 4 to move back and forth, thus forming the O-blade extension. Figure 4 ) and I knife extended ( Figure 5 and Figure 6 There are two working states. The inner sheath handle 11 is provided with a limiting buckle 12. The limiting buckle 12 is either interference-fitted with the outer sheath handle 10 or clamped onto the outer sheath handle 10 to restrict the relative movement between the inner and outer sheath handles, thereby maintaining the O-blade extension (e.g., ...). Figure 4 (as shown) or I-blade extended (as shown) Figure 5 and Figure 6 The working status shown is as shown.

[0041] In this preferred embodiment, the main handle 13 is provided with an electrode 14, which is fixedly connected to the proximal end of the delivery tube 9. The delivery tube 9 is made of conductive material, so that the blade body 1 can be energized.

[0042] In this preferred embodiment, such as Figure 2As shown, the main handle 13 has a scale marking indicating the blade extension length at the connection point with the outer sheath handle 10. This allows the blade extension length to be displayed, facilitating operation.

[0043] In this preferred embodiment, the ceramic head 2 and the O-blade body 4 are fixedly connected by a radial electrode 3.

[0044] In this preferred embodiment, the proximal end of the O-blade body 4 is fixedly connected to the distal end of the inner sheath tube 7 via a ceramic pad 6.

[0045] In this preferred embodiment, such as Figure 3 As shown, the outer sheath handle 10 is sleeved on the outside of the inner sheath handle 11. The outer sheath handle 10 has an opening to expose the inner sheath handle 11. The limiting buckle 12 is a flat clamp structure. The limiting buckle 12 clamps the outer sheath handle 10 and the inner sheath handle 11 to fix the two.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "one implementation," "specific implementation," "other implementation," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment, implementation, or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described above can also be combined in any suitable manner in one or more embodiments, implementations, or examples. The technical solutions described in this utility model also include technical solutions formed by any one or more specific features, structures, materials, or characteristics described above, either individually or in combination.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A multi-functional electrosurgical unit with adjustable length and water injection capability, characterized in that: The device includes an I-blade body (1), a ceramic head (2), a radial electrode (3), an O-blade body (4), an outer sheath (5), an inner sheath (7), a connecting tube (8), a delivery tube (9), an outer sheath handle (10), an inner sheath handle (11), and a main handle (13). The distal end of the delivery tube (9) is fixedly connected to the I-blade body (1) via the connecting tube (8), and the proximal end of the delivery tube (9) is fixed to the main handle (13). The O-blade body (4) is fitted over the I-blade body (1). The distal end of the O-blade body (4) is fixedly fitted with the ceramic head (2) and the radial electrode (3) and is limited by the distal end of the I-blade body (1). (4) The proximal end is fixedly connected to the distal end of the inner sheath (7). The inner sheath (7) is sleeved outside the delivery tube (9). The proximal end of the inner sheath (7) is fixedly connected to the inner sheath handle (11). The outer sheath (5) is sleeved outside the inner sheath (7). The distal end of the outer sheath (5) is limited by the ceramic head (2). The proximal end of the outer sheath (5) is fixedly connected to the outer sheath handle (10). The relative position of the outer sheath handle (10) and the main handle (13) can be moved and changed so as to adjust the overall blade extension length. The relative position of the inner sheath handle (11) and the outer sheath handle (10) can be moved and changed so as to realize the conversion between O-blade and I-blade.

2. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The I-blade body (1) has a hollow structure. The central hole of the I-blade body (1) is connected to the tube hole of the delivery tube (9). The delivery tube (9) is connected to the Luer connector (15) on the main handle (13), so that injection can be performed.

3. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The outer sheath handle (10) and the main handle (13) are connected by threaded fit, interference fit, or concave-convex stop fit to achieve a connection that can both adjust the relative position and fix the relative position.

4. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The inner sheath handle (11) is provided with a limiting buckle (12). The limiting buckle (12) is interference-fitted with the outer sheath handle (10) or clamped on the outer sheath handle (10) to limit the relative movement between the inner sheath handle (11) and the outer sheath handle (10), thereby maintaining the working state of O-blade extension or I-blade extension.

5. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The main handle (13) is provided with an electrode (14), which is fixedly connected to the proximal end of the delivery tube (9). The delivery tube (9) is made of conductive material, so that the blade body (1) can be energized.

6. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The main handle (13) has a scale marking indicating the length of the blade extension at the connection point with the outer sheath handle (10).

7. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The ceramic head (2) and the O-blade body (4) are fixedly connected by a radial electrode (3).

8. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The proximal end of the O-blade body (4) is fixedly connected to the distal end of the inner sheath tube (7) via a ceramic pad (6).

9. The adjustable-length, water-injection multifunctional electrosurgical unit according to claim 1, characterized in that, The outer sheath handle (10) is sleeved on the outside of the inner sheath handle (11). The outer sheath handle (10) has an opening to expose the inner sheath handle (11). The limiting buckle (12) is a flat clip structure. The limiting buckle (12) clamps the outer sheath handle (10) and the inner sheath handle (11) to fix them together.

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