Plasma scalpel with convertible water flow and operation method of plasma scalpel

Abstract

The invention discloses a plasma scalpel with convertible water flow and an operation method of the plasma scalpel, and relates to the technical field of medical instruments. The scalpel comprises an electrode stem, a ceramic seat and a commutation ring. A metal water flow channel is arranged at the front end of the loop electrode tube, so that the whole-course internal circulation of water flow is realized; the ceramic seat is provided with a water absorption hole, an electrode hole, a through part and a water outlet area, and the through part is matched with the water flow channel; the commutation ring is buckled on the working end face of the ceramic base, a plurality of water outlet holes are formed in the ring and matched with the water outlet area, and the water flow mode can be switched by rotating the commutation ring. By adjusting the area of a water outlet hole of the converter ring, the water flow speed and flow are changed, the utilization rate is increased, current density distribution is optimized, and the operation effect is enhanced. And the stretching component fixes the converter ring and realizes rotary switching. The water supply device does not need to be adjusted externally and is compact in structure and convenient to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and particularly relates to a plasma scalpel with switchable high and low water flows and an operating method thereof. Background Art

[0002] Plasma scalpels are widely used in otolaryngology surgeries. Their advantages are that they can effectively reduce intraoperative pain and bleeding, have high operating precision, reduce damage to surrounding tissues and reduce the risk of postoperative complications.

[0003] However, existing plasma scalpels have the following technical defects: Inconvenient water flow adjustment: The scalpel's single water flow mode requires intraoperative adjustment of the water flow rate or volume, requiring remote vacuum suction. Because the surgeon is far from the operating room, the adjustment process requires additional round trips or the reliance on assistants, increasing the complexity of the procedure.

[0004] Low water flow utilization: The water outlet of existing equipment is often located near the working end of the return electrode tube, resulting in water flow dispersion. Increasing the water flow rate can lead to excessive water flow and suffocation risks. Furthermore, excessive amounts of saline, the conductive medium, can cause current density dispersion, affecting coagulation and cutting effectiveness.

[0005] Structural limitations: Some products attempt to create a water outlet in the ceramic base, but this still poses a risk of potential conduction problems with the return electrode. Existing designs cannot balance the need for improved water flow efficiency with the need for convenient intraoperative adjustment.

[0006] The above defects limit the adaptability of the scalpel to different working conditions, and there is an urgent need for a technical solution that can directly regulate the water flow and improve utilization. Summary of the Invention

[0007] The purpose of the embodiment of the present invention is to provide a plasma scalpel with variable water flow and an operating method thereof, which does not require an external water supply device for adjustment, has a compact structure, and is easy to operate, thereby solving at least one technical problem involved in the background technology.

[0008] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: An embodiment of the present invention provides a plasma scalpel with a changeable water flow, comprising: The electrode rod, whose main body is a loop electrode tube, is internally provided with a water suction pipe, a water outlet pipe and a stretching component; the front end of the loop electrode tube is provided with a metal water flow channel for achieving full internal water flow; A ceramic seat is sleeved on the front end of the return electrode tube and is provided with a suction hole, an electrode hole, a through channel, a groove and a water outlet area; the through channel is sealed and connected to the water flow channel of the return electrode tube; The commutation ring is buckled on the working end surface of the ceramic base and can rotate relative to the ceramic base; the commutation ring is provided with multiple water outlet holes, which are selectively connected to the water outlet area of ​​the ceramic base through rotation to switch the water flow mode.

[0009] Optionally, the metal water flow channel is integrally formed with the loop electrode tube and simultaneously serves as a loop electrode to complete circuit conduction.

[0010] Optionally, the through-channel of the ceramic seat includes four main channels and one secondary channel; the four main channels are connected to the water flow channel of the loop electrode tube, and the secondary channel is used to fix the tensile component; the water outlet area is provided with a hollow protrusion structure to prevent lateral water leakage when the commutation ring rotates.

[0011] Optionally, a circle of extension grooves is provided on the outer periphery of the ceramic seat, which is fixed to the loop electrode tube by a waterproof adhesive.

[0012] Optionally, the water outlet holes of the commutation ring include at least two types of different apertures; the area of ​​the smallest water outlet hole is smaller than the opening area of ​​the water flow channel of the loop electrode tube, which is used to increase the water flow velocity and reduce the total flow by reducing the flow area.

[0013] Optionally, the bottom surface of the commutation ring is provided with an annular groove for clamping and fixing with the tensile component.

[0014] Optionally, the stretching component includes a fixing rod, a placement tube and a spring; One end of the fixing rod is inserted into the groove of the commutation ring to achieve locking and fixing, and the other end is connected to the handle control mechanism; The spring is sleeved on the outside of the fixing rod, with two ends respectively abutting against the flanges of the placement tube and the fixing rod to provide a restoring elastic force.

[0015] Optionally, when the stretching component is pulled, the commutation ring can rotate within a limited angle to achieve docking and switching between different water outlet holes and water outlet areas of the ceramic seat; after loosening, the spring pushes the fixing rod to reset and lock the commutation ring.

[0016] Optionally, the height of the commutation ring is slightly higher than the exposed height of the working electrode, so that a cylindrical working area is formed when the working end face is close to the tissue.

[0017] The present invention also provides a method for operating the plasma scalpel, comprising: The water flows from the outlet pipe into the water flow channel of the loop electrode tube, passes through the through channel of the ceramic seat and reaches the water outlet hole of the commutation ring; The handle controls the stretching component to pull and rotate the commutation ring, switching the water outlet to adjust the water flow rate and flow rate; The water flow forms a uniform current density distribution on the working end face, completing the cutting or ablation operation.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention realizes the full internal circulation of water through the built-in metal water flow channel (integrated with the loop electrode tube), ensuring that the water flows directly to the working end face; reduces water flow dispersion, allows physiological saline to fully participate in electrical conduction, improves the uniformity of current density, and improves coagulation and cutting effects; reduces the water flow demand per unit operation, reduces the waste of physiological saline and the risk of suffocation.

[0019] (2) The present invention realizes multi-speed water flow switching by cooperating with a rotating commutation ring and a stretching component: the change in the area of ​​the water outlet of the commutation ring can adjust the water flow rate (the flow rate increases when the water pressure increases) and the flow rate (the total flow rate decreases); the doctor does not need to adjust the external water supply equipment, and can directly control it through the handle button / slide key, reducing the complexity of the operation.

[0020] (3) The water flow channel of the present invention serves as a loop electrode, shortening the distance to the working electrode and enhancing the field strength at the working end face; the inner wall of the commutation ring forms a cylindrical working area, making the water flow and current density distribution more uniform, thereby improving the consistency of ablation cutting.

[0021] (4) The metal water flow channel of the present invention is completely enclosed in an insulating layer to prevent the return electrode from contacting the human body; the ceramic seat and the return pipe are fixed with a waterproof adhesive, and the hollow protrusion design prevents lateral water leakage; the spring structure of the tensile component ensures that the commutation ring is firmly positioned and there is no water flow interruption during switching.

[0022] (5) The small water outlet mode (high flow rate, low flow) of the present invention has both flushing effects and adapts to the operation requirements of different organizations; the number / shape of the water outlet holes of the commutation ring can be expanded to support smooth adjustment of more gears.

[0023] (6) The purely mechanical structure of the present invention realizes water flow switching without the need for a motor or power supply equipment; key components (commutation ring, stretching component) can be made of low-cost insulating materials to reduce production costs; the overall diameter is only slightly larger than the front end of the loop pipe, keeping the scalpel small and avoiding obstruction of the intraoperative field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which: Figure 1 A schematic diagram of the overall structure of the plasma scalpel with switchable water flow provided by the present invention; Figure 2 Schematic diagram of the overall cross-sectional structure of the plasma scalpel with variable water flow provided by the present invention Figure 3 A schematic structural diagram of the loop electrode tube provided by the present invention; Figure 4 A schematic diagram of the three-dimensional structure of the ceramic base provided by the present invention; Figure 5 A schematic cross-sectional view of the ceramic base provided by the present invention; Figure 6 A schematic diagram of the three-dimensional structure of the commutation ring provided by the present invention; Figure 7 This is a schematic diagram of the back structure of the commutation ring provided by the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the stretching component provided by the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] The terms "first," "second," and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0027] See Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a plasma surgical knife with variable water flow, comprising an electrode rod 100 , a ceramic base 2 and a commutation ring 3 .

[0028] The main body of the electrode rod 100 is a return electrode tube 1 , which is provided with a water suction tube 10 , a return tube 12 and a stretching component 4 .

[0029] Recombination Figure 3 As shown, a metal water flow channel 101 is provided at the front end of the loop electrode tube 1 for achieving full internal circulation of water.

[0030] There are four water flow channels 101, which are evenly arranged along the circumferential direction of the open end of the loop electrode tube 1. In this way, the water flow can be circulated internally throughout the entire process, ensuring that the water flow reaches the working end face directly, reducing water flow dispersion, allowing physiological saline to fully participate in conductivity, improving current density uniformity, and improving coagulation and cutting effects; reducing the water flow demand per unit operation, reducing physiological saline waste and the risk of suffocation.

[0031] The metal water flow channel 101 is integrally formed with the return electrode tube 1 and serves as a return electrode to complete circuit conduction. Using the water flow channel 101 as a return electrode shortens the distance to the working electrode and enhances the field strength at the working end face.

[0032] Of course, in order to prevent the return electrode from contacting the human body, the water flow channel is completely enclosed in the insulation layer.

[0033] Recombination Figure 4 and Figure 5 As shown, the ceramic seat 2 is sleeved on the front end of the return electrode tube 1, and is provided with a suction hole, an electrode hole, a through channel 201, a groove 202 and a water outlet area 203; the through channel 201 is sealed and connected to the water flow channel 101 of the return electrode tube 1.

[0034] The ceramic base 2 and the return electrode tube 1 are fixedly connected by using a waterproof adhesive.

[0035] The through channel 201 of the ceramic base 2 includes four main channels and one secondary channel. The four main channels are connected to the water flow channel 101 of the return electrode tube 1, and the secondary channel is used to fix the tensile component 4.

[0036] The water outlet area 203 is provided with a hollow protrusion structure to prevent lateral water leakage when the commutator ring 3 rotates.

[0037] The outer periphery of the ceramic base 2 is provided with a circle of extension grooves 202 , which are fixed to the return electrode tube 1 by a waterproof adhesive. The outer side of the return electrode tube 1 is provided with an insulating layer 11 .

[0038] Recombination Figure 6 and Figure 7 As shown, the commutation ring 3 is buckled on the working end surface of the ceramic base 2 and can rotate relative to the ceramic base 2.

[0039] The height of the commutation ring 3 is slightly higher than the exposed height of the working electrode, so that a cylindrical working area is formed when the working end face is close to the tissue.

[0040] The commutation ring 3 is provided with a plurality of water outlet holes 301 , which are selectively connected to the water outlet area 203 of the ceramic base 2 through rotation to switch the water flow mode.

[0041] Specifically, the water outlet holes 301 of the commutation ring 3 include at least two different aperture types; the area of ​​the smallest water outlet hole is smaller than the opening area of ​​the water flow channel 101 of the loop electrode tube 1, which is used to increase the water flow velocity and reduce the total flow by reducing the flow area.

[0042] The bottom surface of the commutation ring 3 is provided with an annular groove 302 for clamping and fixing with the tensile component 4 .

[0043] The inner wall of the commutation ring 3 forms a cylindrical working area, which makes the water flow and current density distribution more uniform, thereby improving the consistency of ablation cutting.

[0044] Recombination Figure 8 As shown, the stretching component 4 includes a fixing rod 401 , a placement tube 402 and a spring 403 .

[0045] One end of the fixing rod 401 is inserted into the groove 302 of the commutation ring 3 to achieve positioning and fixing, and the other end is connected to the handle control mechanism.

[0046] The spring 403 is sleeved on the outside of the fixing rod 401, with its two ends respectively abutting the flanges of the placement tube 402 and the fixing rod 401 to provide a reset elastic force. This spring structure ensures that the commutation ring is firmly positioned and there is no interruption in water flow during switching.

[0047] When the stretching component 4 is pulled, the commutator ring 3 can rotate within a limited angle to achieve docking and switching between different water outlet holes 301 and the water outlet area 203 of the ceramic seat 2; after loosening, the spring 403 pushes the fixed rod 401 to reset and lock the commutator ring 3. In this way, multi-speed water flow switching can be achieved through the cooperation of the rotating commutator ring and the stretching component: the change in the area of ​​the water outlet hole of the commutator ring can adjust the water flow rate (the flow rate increases when the water pressure increases) and the flow rate (the total flow rate decreases); the doctor does not need to adjust the external water supply equipment, and can directly control it through the handle button / slide key, reducing the complexity of the operation.

[0048] Not only that, the small outlet mode (high flow rate, low flow) has both flushing effects and can adapt to the operational needs of different organizations; the number / shape of the outlet holes in the commutation ring can be expanded to support smooth adjustment of more gears.

[0049] This purely mechanical structure is used to achieve water flow switching without the need for a motor or power supply equipment; key components (commutation ring, stretching components) can use low-cost insulating materials to reduce production costs; the overall diameter is only slightly larger than the front end of the loop pipe, keeping the scalpel small and avoiding obstruction of the intraoperative field of view.

[0050] The present invention also provides a method for operating the plasma scalpel, comprising: The water flows from the outlet pipe into the water flow channel 101 of the return electrode tube 1, passes through the through channel 201 of the ceramic base 2 and reaches the water outlet hole 301 of the commutation ring 3; The handle controls the stretching component 4 to pull and rotate the commutation ring 3, switching the water outlet 301 to adjust the water flow speed and flow rate; The water flow forms a uniform current density distribution on the working end face, completing the cutting or ablation operation.

[0051] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0052] Furthermore, it should be noted that the scope of the methods and systems of the present invention is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order, depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A plasma scalpel with variable water flow, characterized in that: include: The electrode rod has a main body which is a loop electrode tube (1) and is provided with a water suction pipe, a water discharge pipe and a stretching component (4) inside; a metal water flow channel (101) is provided at the front end of the loop electrode tube (1) for achieving full internal circulation of water; A ceramic seat (2) is sleeved on the front end of the loop electrode tube (1), and is provided with a suction hole, an electrode hole, a through channel (201), a groove (202), and a water outlet area (203); the through channel (201) is sealed and connected to the water flow channel (101) of the loop electrode tube (1); The commutation ring (3) is buckled on the working end surface of the ceramic seat (2) and can rotate relative to the ceramic seat (2); the commutation ring (3) is provided with a plurality of water outlet holes (301), which are selectively connected to the water outlet area (203) of the ceramic seat (2) through rotation to switch the water flow mode.

2. The plasma surgical knife with variable water flow according to claim 1, characterized in that: The metal water flow channel (101) is integrally formed with the loop electrode tube (1), and simultaneously serves as a loop electrode to complete circuit conduction.

3. The plasma surgical knife with variable water flow according to claim 2, characterized in that: The through channel (201) of the ceramic seat (2) includes four main channels and one secondary channel; the four main channels are connected to the water flow channel (101) of the loop electrode tube (1), and the secondary channel is used to fix the stretching component (4); the water outlet area (203) is provided with a hollow protrusion structure to prevent lateral water leakage when the commutation ring (3) rotates.

4. The plasma surgical knife with variable water flow according to claim 1, characterized in that: The outer periphery of the ceramic seat (2) is provided with a circle of extension grooves (202), which are fixed to the return electrode tube (1) via a waterproof adhesive.

5. The plasma surgical knife with variable water flow according to claim 1, characterized in that: The water outlet holes (301) of the commutation ring (3) include at least two types of different apertures; the area of ​​the smallest water outlet hole is smaller than the opening area of ​​the water flow channel (101) of the loop electrode tube (1), and is used to increase the water flow velocity and reduce the total flow by reducing the flow area.

6. The plasma surgical knife with variable water flow according to claim 1 or 5, characterized in that: The bottom surface of the commutation ring (3) is provided with an annular groove (302) for being clamped and fixed with the stretching component (4).

7. The plasma surgical knife with variable water flow according to claim 1, characterized in that: The stretching component (4) includes a fixing rod (401), a placement tube (402) and a spring (403); One end of the fixing rod (401) is inserted into the groove (302) of the commutation ring (3) to achieve positioning and fixing, and the other end is connected to the handle control mechanism; The spring (403) is sleeved on the outside of the fixing rod (401), with its two ends respectively abutting against the flanges of the placement tube (402) and the fixing rod (401), providing a restoring elastic force.

8. The plasma surgical knife with variable water flow according to claim 7, characterized in that: When the stretching component (4) is pulled, the commutation ring (3) can rotate within a limited angle, thereby achieving docking switching between different water outlet holes (301) and the water outlet area (203) of the ceramic seat (2); after loosening, the spring (403) pushes the fixing rod (401) to reset and lock the commutation ring (3).

9. The plasma surgical knife with variable water flow according to claim 1, characterized in that: The height of the commutation ring (3) is slightly higher than the exposed height of the working electrode, so that a cylindrical working area is formed when the working end face is close to the tissue.

10. A method for operating the plasma surgical knife according to any one of claims 1 to 9, characterized in that: include: Water flows from the outlet pipe into the water flow channel (101) of the loop electrode tube (1), and reaches the water outlet hole (301) of the commutation ring (3) through the through channel (201) of the ceramic seat (2); The stretching component (4) is controlled by a handle to pull and rotate the commutation ring (3), thereby switching the water outlet (301) to adjust the water flow speed and flow rate; The water flow forms a uniform current density distribution on the working end face, completing the cutting or ablation operation.

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