Plasma surgical electrode

Abstract

The utility model discloses a plasma surgical electrode, which belongs to the field of medical instruments and comprises a handle and a tool bit component, a cathode conductive tube of the tool bit component is sleeved on the outer side of an anode conductive tube, a water inlet channel is arranged between the cathode conductive tube and the anode conductive tube, an attraction channel is arranged in the anode conductive tube, and an insulating outer layer is sleeved on the cathode conductive tube. An insulating layer is arranged outside the positive conductive tube; the front port of the positive conductive tube is connected with an annular electrode tip, the outer diameter of the electrode tip is larger than that of the positive conductive tube, the inner diameter of the front section of the suction channel is smaller than that of the rear section, and the inner diameter of the suction port of the electrode tip is not larger than that of the front port of the suction channel; a power cable, a water inlet pipe and a water suction pipe are arranged on the handle, the power cable is connected with the positive conductive pipe and the negative conductive pipe, the water inlet pipe and the water suction pipe are communicated with the water inlet channel and the suction channel respectively, and a water outlet is formed in the front end of the water inlet channel. The electrode tip is stable in structure and has enough working area, and meanwhile blockage caused by suction of large tissue is avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a plasma surgical electrode. Background Art

[0002] The low-temperature plasma surgical system uses a 100KHz radio frequency electric field to excite the electrolyte (physiological saline) to form a thin plasma layer with a thickness of about 50 microns around the electrode. The plasma layer is composed of a large number of charged particles, which generate enough energy (electron volts) to open the molecular bonds that constitute the target tissue cells at low temperatures (40℃-70℃), so that the tissue can be quickly decomposed into low molecular weight molecules and atoms, thereby achieving both efficient tissue cutting and ablation and coagulation and hemostasis effects at lower temperatures. Since the tissue is not directly destroyed, the damage to the surrounding tissue is minimal, and the current does not flow directly through the tissue, the tissue heat is minimal, and the treatment temperature is low. Therefore, with the characteristics of "minimally invasive, precise, convenient, and safe", the low-temperature plasma system has been widely used in the treatment of diseases such as otolaryngology, urology, and spinal surgery in recent years, and has been tried in neurosurgery and has been proven to have good results.

[0003] The plasma surgical electrode breaks up or cuts the tissue by cutting or ablating, and then sucks it away through the suction channel. During use, it is easy to suck in larger tissues, blocking the suction channel inside the plasma surgical electrode and affecting normal surgical operations. Utility Model Content

[0004] The utility model provides a plasma surgical electrode, the electrode head structure is stable, and a sufficient working area is guaranteed, while avoiding the inhalation of larger tissues during the use of the electrode, blocking the suction channel, and affecting normal surgical operations.

[0005] The utility model provides the following technical solutions:

[0006] A plasma surgical electrode comprises a handle and a blade assembly connected in sequence from back to front;

[0007] The cutter head assembly comprises a positive conductive tube and a negative conductive tube, the outer diameter of the positive conductive tube is smaller than the inner diameter of the negative conductive tube, the negative conductive tube is sleeved on the outside of the positive conductive tube, the outer wall of the negative conductive tube is sleeved with an insulating outer layer, the hollow part inside the positive conductive tube serves as a suction channel, and a set gap is provided between the outer wall of the positive conductive tube and the inner wall of the negative conductive tube as a water inlet channel, and the front end of the water inlet channel has a water outlet;

[0008] The positive electrode conductive tube has an insulating layer on the outside, and a bare electrode head is connected to the front end of the positive electrode conductive tube. The electrode head is welded or integrally formed with the positive electrode conductive tube. The electrode head is a circular ring structure and is arranged perpendicular to the axis of the positive electrode conductive tube. The outer diameter of the electrode head is larger than the outer diameter of the positive electrode conductive tube. The middle part of the circular ring structure electrode head has a suction port, and the suction port is connected to the suction channel; the inner diameter of the front section of the suction channel is smaller than the inner diameter of the rear section of the suction channel, and the inner diameter of the suction port is not larger than the inner diameter of the front end of the suction channel;

[0009] The handle is provided with a power cable, a water inlet pipe and a water suction pipe, the positive wire and the negative wire of the power cable are respectively connected to the positive conductive pipe and the negative conductive pipe, the water inlet pipe is connected to the water inlet channel, and the water suction pipe is connected to the suction channel.

[0010] Furthermore, the front end of the positive conductive tube extends forward from the front end of the negative conductive tube and extends forward by a set length. An insulating sleeve is provided between the front end of the positive conductive tube and the front end of the negative conductive tube. There is a set distance between the front end of the insulating sleeve and the rear end of the electrode head.

[0011] Furthermore, the water outlet is opened on the side wall of the negative electrode conductive tube, and a set gap is provided between the negative electrode conductive tube and the insulating outer layer in front of the water outlet to form a water outlet channel connected to the water outlet.

[0012] Furthermore, the front end of the cutter head assembly has a bending portion with a set angle, and the water outlet, water outlet channel, insulating sleeve and electrode head are located at the position of the bending portion.

[0013] Furthermore, the positive electrode conductive tube and the negative electrode conductive tube are made of metal, the insulating layer of the positive electrode conductive tube is an insulating coating, the insulating coating is made of Teflon, and the insulating sleeve is made of plastic or ceramic.

[0014] Furthermore, a negative pressure suction regulator is provided on the suction channel.

[0015] Furthermore, the negative pressure suction regulator includes a plurality of adjustment holes, one end of each adjustment hole is connected to the suction channel, and the other end extends outside the handle, and each adjustment hole is equipped with a blocking member for blocking the adjustment hole.

[0016] Furthermore, the rear of the blade head assembly is arranged inside the handle, the rear of the positive conductive tube and the negative conductive tube are fixed inside the handle and sealed by epoxy glue, the positive wire and the negative wire are respectively connected to the rear of the positive conductive tube and the negative conductive tube, and the water inlet pipe and the water suction pipe are respectively connected to the rear of the water inlet channel and the suction channel.

[0017] Furthermore, the negative electrode conductive tube is provided with a forked water inlet pipe that forks backward at the rear, and the forked water inlet pipe and the negative electrode conductive tube body form an H-shaped or Y-shaped structure. The front end of the forked water inlet pipe is connected to the water inlet channel, and the rear end is connected to the water inlet pipe.

[0018] Furthermore, the ends of the power cable, the water inlet pipe and the water suction pipe are respectively provided with a cable connector, a water inlet connector and a water suction connector.

[0019] The utility model has the following beneficial effects:

[0020] The electrode head of the utility model is designed as a circular ring, which is perpendicular to the positive conductive tube and has a diameter larger than the positive conductive tube, so that the electrode head is turned outward and protrudes from the positive conductive tube, ensuring a sufficient working area. In addition, the advantages of the electrode head of the present application over the common electrode structure are that the head structure is stable, it is not easy to fall off when the electrode is heated or operated, and the distance between the positive and negative electrodes is stable and not loose. The inner diameter of the suction channel is not less than the inner diameter of the suction port of the electrode head, and the inner diameter of the suction channel is generally small in the front section and large in the rear section, and it is integrally formed without dead angles. The suction capacity is guaranteed, and it is avoided that larger tissues are sucked in during the use of the electrode, which blocks the suction channel and affects normal surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of the overall structure of a plasma surgical electrode of the present invention;

[0022] FIG2 is a schematic structural diagram of the front end of the cutter head assembly;

[0023] Figure 3 is a schematic diagram of the interior of the handle (wires omitted);

[0024] FIG4 is a schematic diagram of a negative pressure suction regulator;

[0025] FIG5 is a schematic diagram of a bifurcated water inlet pipe;

[0026] FIG. 6 is a schematic diagram of the rear structure of the plasma surgical electrode of the present invention.

[0027] The figure marks in the accompanying drawings are: handle 1, blade head assembly 2, positive conductive pipe 3, negative conductive pipe 4, insulating outer layer 5, suction channel 6, water inlet channel 7, water outlet 8, insulating layer 9, electrode head 10, power cable 11, water inlet pipe 12, water suction pipe 13, positive wire 14, negative wire 15, insulating sleeve 16, water outlet channel 17, bending part 18, negative pressure suction regulator 19, adjustment hole 20, negative pressure suction pipe 21, cable connector 22, water inlet connector 23, water suction connector 24, forked water inlet pipe 25. DETAILED DESCRIPTION

[0028] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0029] The utility model provides a plasma surgical electrode, as shown in FIGS. 1-6 , comprising a handle 1 and a blade assembly 2 which are sequentially connected from back to front, wherein the handle is made of insulating material and has a hollow space in the middle.

[0030] The cutter head assembly 2 includes a positive conductive tube 3 and a negative conductive tube 4. The outer diameter of the positive conductive tube 3 is smaller than the inner diameter of the negative conductive tube 4. The negative conductive tube 4 is sleeved on the outside of the positive conductive tube 3. The outer wall of the negative conductive tube 4 is sleeved with an insulating outer layer 5. The hollow part inside the positive conductive tube 3 serves as a suction channel 6. There is a set gap between the outer wall of the positive conductive tube 3 and the inner wall of the negative conductive tube 4, which serves as a water inlet channel 7. The front end of the water inlet channel 7 has a water outlet 8.

[0031] The positive electrode conductive tube 3 has an insulating layer 9 on the outside, and a bare electrode head 10 is connected to the front end of the positive electrode conductive tube 3, and the electrode head 10 is laser welded or integrally formed with the positive electrode conductive tube 3. The electrode head 10 is a circular ring structure and is arranged perpendicular to the axis of the positive electrode conductive tube 3. The outer diameter of the electrode head 10 is larger than the outer diameter of the positive electrode conductive tube 3. The middle part of the circular ring structure electrode head 10 has a suction port, and the suction port is connected to the suction channel 6; the inner diameter of the front section of the suction channel 6 is smaller than the inner diameter of the rear section of the suction channel 6, and the inner diameter of the suction port is not larger than the inner diameter of the front end of the suction channel 6.

[0032] The handle 1 is provided with a power cable 11, a water inlet pipe 12 and a water suction pipe 13. The positive wire 14 and the negative wire 15 of the power cable 11 are respectively connected to the positive conductive pipe 3 and the negative conductive pipe 4. The water inlet pipe 12 is connected to the water inlet channel 7, and the water suction pipe 13 is connected to the suction channel 6.

[0033] When the utility model is working, the power cable 11, the water inlet pipe 12 and the water suction pipe 13 are respectively connected to the external power supply, the external device for providing physiological saline and the external suction pump. The two-pole wires of the power cable 11 are respectively powered by the positive conductive pipe 3 and the negative conductive pipe 4. The physiological saline is stimulated at the front electrode head 10 to form plasma, and the surgical site is cut, ablated, coagulated and hemostatic. At the same time, the physiological saline is used to flush the intraoperative tissue through the water outlet 8 at the front end of the water inlet channel 7, which plays a role in assisting cooling and reducing tissue adhesion during coagulation and hemostasis. The cut or ablated tissue is sucked out through the suction channel 6.

[0034] The electrode head of the utility model is designed as a circular ring, which is perpendicular to the positive conductive tube and has a diameter larger than the positive conductive tube, so that the electrode head is turned outward and protrudes from the positive conductive tube, ensuring a sufficient working area. In addition, the advantages of the electrode head of the present application over the common electrode structure are that the head structure is stable, it is not easy to fall off when the electrode is heated or operated, and the distance between the positive and negative electrodes is stable and not loose. The inner diameter of the suction channel is not less than the inner diameter of the suction port of the electrode head, and the inner diameter of the suction channel is generally small in the front section and large in the rear section, and it is integrally formed without dead angles. The suction capacity is guaranteed, and the suction of larger tissues during the use of the electrode is avoided, which blocks the suction channel and affects normal surgical operations.

[0035] In the present invention, the front end of the positive electrode conductive tube 3 extends forward from the front end of the negative electrode conductive tube 4 and extends forward by a set length, and an insulating sleeve 16 is provided between the front end of the positive electrode conductive tube 3 and the front end of the negative electrode conductive tube 4, and a set distance is provided between the front end of the insulating sleeve 16 and the rear end of the electrode head 10. The insulating sleeve 16 is made of plastic or ceramic to ensure insulation, and is connected and sealed with the negative electrode conductive tube 4 using epoxy glue.

[0036] The aforementioned water outlet 8 is opened on the side wall of the negative electrode conductive tube 4 , and there is a set gap between the negative electrode conductive tube 4 and the insulating outer layer 5 in front of the water outlet 8 , forming a water outlet channel 17 connected to the water outlet 8 .

[0037] To facilitate operation and prevent obstruction of vision, the front end of the cutter head assembly 2 has a bent portion 18 with a set angle, and the aforementioned water outlet 8, water outlet channel 17, insulating sleeve 16 and electrode head 10 are all located at the position of the bent portion 18.

[0038] Furthermore, the positive electrode conductive tube 3 and the negative electrode conductive tube 4 are made of metal, such as stainless steel. The insulating layer 9 of the positive electrode conductive tube 3 is an insulating coating, which can be made of Teflon material, and the inner and outer surfaces of the positive electrode conductive tube 3 are both provided with Teflon coating.

[0039] In order to adjust the suction flow, a negative pressure suction regulator 19 is provided on the suction channel 6. Specifically, the negative pressure suction regulator 19 includes a plurality of adjustment holes 20, one end of each adjustment hole 20 is connected to the suction channel 6, and the other end extends outside the handle 1, and each adjustment hole 20 is equipped with a blocking member for blocking the adjustment hole.

[0040] During operation, the regulating hole is blocked by the blocking piece, and the negative pressure of suction is adjusted by the number of blocked regulating holes to achieve the purpose of adjusting the suction flow. The blocking piece can be made of soft materials such as rubber and silicone, and is sealed with an interference fit with the regulating hole. At the same time, rubber and silicone have insulating properties.

[0041] In one example, the negative pressure suction regulator 19 may include a negative pressure suction tube 21 having a plurality of adjustment holes 20 thereon. The negative pressure suction tube 21 is sleeved on the positive conductive tube 3. The positive conductive tube 3 has holes opened at positions corresponding to the adjustment holes 20. The handle also has holes or grooves opened at positions corresponding to the adjustment holes 20.

[0042] For easy connection, the rear of the blade assembly 2 is arranged inside the handle 1, and the rear of the positive conductive tube 3 and the negative conductive tube 4 are fixed inside the handle 1 and sealed by epoxy glue. The positive wire 14 and the negative wire 15 are respectively connected to the rear of the positive conductive tube 3 and the negative conductive tube 4, for example, by welding. The water inlet pipe 12 and the water suction pipe 13 are respectively connected to the rear of the water inlet channel 7 and the suction channel 6.

[0043] The insulating outer layer 5 is specifically heat-shrunk on the outer wall of the negative conductive tube 4, but the front end portion is not tightly heat-shrunk, but forms a water outlet channel 17 between the negative conductive tube 4, and the handle 1 is fixed to the rear end heat-shrunk portion.

[0044] For convenient connection, the ends of the power cable 11, the water inlet pipe 12 and the water suction pipe 13 are respectively provided with a cable connector 22, a water inlet connector 23 and a water suction connector 24.

[0045] At present, the internal design of plasma electrode handles is that a water inlet needle is inserted into the negative electrode steel tube and sealed with epoxy glue. Water is easy to enter the handle. Even if the handle is sealed with epoxy glue, it cannot achieve a good waterproof purpose.

[0046] In order to solve the above problems, the negative conductive tube 4 of the utility model is provided with a forked water inlet pipe 25 that forks backwards at the rear, and the forked water inlet pipe 25 and the main body of the negative conductive tube 4 form an H-shaped or Y-shaped structure. The front end of the forked water inlet pipe 25 is connected to the water inlet channel 6, and the rear end is connected to the water inlet pipe 13.

[0047] The bifurcated water inlet pipe of the above structure avoids the need for a water tank to be designed inside the handle, has a secure connection, simplifies assembly materials and processes, reduces water connection points, and thus reduces the risk of water leakage, ensuring that water does not overflow.

[0048] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A plasma surgical electrode, characterized in that: It includes a handle and a blade assembly connected in sequence from back to front; The cutter head assembly comprises a positive conductive tube and a negative conductive tube, the outer diameter of the positive conductive tube is smaller than the inner diameter of the negative conductive tube, the negative conductive tube is sleeved on the outside of the positive conductive tube, the outer wall of the negative conductive tube is sleeved with an insulating outer layer, the hollow part inside the positive conductive tube serves as a suction channel, and a set gap is provided between the outer wall of the positive conductive tube and the inner wall of the negative conductive tube as a water inlet channel, and the front end of the water inlet channel has a water outlet; The positive electrode conductive tube has an insulating layer on the outside, and a bare electrode head is connected to the front end of the positive electrode conductive tube. The electrode head is welded or integrally formed with the positive electrode conductive tube. The electrode head is a circular ring structure and is arranged perpendicular to the axis of the positive electrode conductive tube. The outer diameter of the electrode head is larger than the outer diameter of the positive electrode conductive tube. The middle part of the circular ring structure electrode head has a suction port, and the suction port is connected to the suction channel; the inner diameter of the front section of the suction channel is smaller than the inner diameter of the rear section of the suction channel, and the inner diameter of the suction port is not larger than the inner diameter of the front end of the suction channel; The handle is provided with a power cable, a water inlet pipe and a water suction pipe, the positive wire and the negative wire of the power cable are respectively connected to the positive conductive pipe and the negative conductive pipe, the water inlet pipe is connected to the water inlet channel, and the water suction pipe is connected to the suction channel.

2. The plasma surgical electrode according to claim 1, characterized in that: The front end of the positive conductive tube extends forward from the front end of the negative conductive tube and extends forward by a set length. An insulating sleeve is provided between the front end of the positive conductive tube and the front end of the negative conductive tube. A set distance is provided between the front end of the insulating sleeve and the rear end of the electrode head.

3. The plasma surgical electrode according to claim 2, characterized in that: The water outlet is opened on the side wall of the negative electrode conductive pipe, and a set gap is provided between the negative electrode conductive pipe and the insulating outer layer in front of the water outlet to form a water outlet channel connected to the water outlet.

4. The plasma surgical electrode according to claim 3, characterized in that: The front end of the cutter head assembly has a bending portion with a set angle, and the water outlet, water outlet channel, insulating sleeve and electrode head are located at the position of the bending portion.

5. The plasma surgical electrode according to claim 2, characterized in that: The positive electrode conductive tube and the negative electrode conductive tube are made of metal, the insulating layer of the positive electrode conductive tube is an insulating coating, the insulating coating is made of Teflon, and the insulating sleeve is made of plastic or ceramic.

6. The plasma surgical electrode according to claim 1, characterized in that: A negative pressure suction regulator is arranged on the suction channel.

7. The plasma surgical electrode according to claim 6, characterized in that: The negative pressure suction regulator includes a plurality of adjustment holes, one end of each adjustment hole is connected to the suction channel, and the other end extends outside the handle, and each adjustment hole is equipped with a blocking member for blocking the adjustment hole.

8. The plasma surgical electrode according to claim 1, characterized in that: The rear of the cutter head assembly is arranged inside the handle, the rear of the positive conductive tube and the negative conductive tube are fixed inside the handle and sealed by epoxy glue, the positive wire and the negative wire are respectively connected to the rear of the positive conductive tube and the negative conductive tube, and the water inlet pipe and the water suction pipe are respectively connected to the rear of the water inlet channel and the suction channel.

9. The plasma surgical electrode according to claim 8, characterized in that: The negative electrode conductive tube is provided with a forked water inlet pipe that forks backward at the rear, and the forked water inlet pipe and the negative electrode conductive tube body form an H-shaped or Y-shaped structure. The front end of the forked water inlet pipe is connected to the water inlet channel, and the rear end is connected to the water inlet pipe.

10. The plasma surgical electrode according to claim 8, characterized in that: The ends of the power cable, the water inlet pipe and the water suction pipe are respectively provided with a cable connector, a water inlet connector and a water suction connector.

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