Tool bit of plasma scalpel and plasma scalpel

Abstract

The utility model relates to a tool bit of a plasma scalpel and the plasma scalpel, and belongs to the technical field of medical instruments. The plasma scalpel comprises a handle and a scalpel head, the scalpel head comprises a tubular electrode, an insulating base, a sheet electrode and a wire electrode, a notch is formed in one side of the front end of the tubular electrode, the insulating base is embedded in the notch and provided with a suction hole, the sheet electrode is arranged on the insulating base, and the wire electrode penetrates through the sheet electrode. A suction through hole is formed in the center of the sheet-shaped electrode, and a plurality of sharp corners are arranged in the suction through hole. According to the tool bit of the plasma scalpel and the plasma scalpel, the situation of suction blockage or suction force dispersion is not prone to occurring, and the suction effect is better; moreover, due to the fact that the suction through hole is provided with a sharp corner, strong discharge can be achieved around, focus tissue can be cut to be finer, and waste tissue can pass through the suction through hole more easily.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a blade head of a plasma scalpel and a plasma scalpel. Background Art

[0002] The existing plasma active medical device products used in UBE are mainly used for cutting or hemostasis. Please refer to the utility model patent with application number CN202021119111.1 and the name of "a plasma scalpel head". The plasma scalpel usually includes a tubular electrode, a sheet electrode and a filament electrode. The front end of the tubular electrode is usually provided with an insulating seat, and the sheet electrode is located on the insulating seat. The filament electrode is passed through the sheet electrode and the sheet electrode is fixed on the insulating seat. In addition, a suction hole is usually provided on the insulating seat, and a plurality of suction through holes matching the suction tube are usually provided on the sheet electrode. Due to the structural problems of the suction through holes, blockages often occur. The main cause of the blockage is that the tissue debris after cutting and ablation blocks the suction hole at the front end of the electrode. Once blocked, the tissue debris cannot be removed, blocking the endoscope, making the surgical field unclear and unable to see the diseased tissue, resulting in the inability to carry out the operation. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a blade head of a plasma scalpel and a plasma scalpel, which are not prone to suction blockage or suction dispersion, and have a better suction effect; and, because the suction through hole has a sharp corner, it can cause strong discharge around it, which will cut the diseased tissue into smaller pieces and make it easier for waste tissue to pass through the suction through hole.

[0004] The technical solution of the utility model is as follows:

[0005] The utility model provides a blade head of a plasma surgical knife, which is used for UBE procedure, and comprises a tubular electrode, an insulating seat, a sheet electrode and a wire electrode. A notch is arranged on one side of the front end of the tubular electrode, the insulating seat is embedded in the notch and has a suction hole, the sheet electrode is arranged on the insulating seat, the wire electrode is passed through the sheet electrode, a suction through hole is arranged at the central part of the sheet electrode, and a plurality of sharp corners are arranged in the suction through hole.

[0006] As an optional solution, the tubular electrode includes a first electrode and a second electrode, the second electrode is tubular and coated with an insulating layer on the outside, the first electrode is arranged at the front end of the second electrode, and the notch is arranged on one side of the second electrode.

[0007] As an optional solution, the front end of the tubular electrode is spherical.

[0008] As an optional solution, a plurality of protrusions extending inwardly are arranged in the suction through hole, and the protrusions form sharp corners.

[0009] As an optional solution, a plurality of auxiliary through holes are arranged around the attraction through hole, and the wire-shaped electrode is inserted into the auxiliary through holes. The auxiliary through holes include strip holes, and triangular holes and circular holes that are alternately arranged.

[0010] The utility model also provides a plasma surgical knife, comprising a handle and the above-mentioned knife head, wherein the rear end of the knife head is connected to the handle.

[0011] As an optional solution, the plasma surgical knife further comprises a nerve probe, the front end of which is exposed and adjacent to the sheet electrode.

[0012] As an optional solution, the nerve detector is disposed between the third electrode and the insulating layer, and is exposed from the front end of the insulating layer.

[0013] As an optional solution, a warning light is provided on the handle, and the warning light displays the detection result of the nerve detector by changing color and lighting frequency.

[0014] As an optional solution, the plasma surgical knife further includes a suction tube and a plug, wherein the suction tube is communicated with the suction hole, and the plug is electrically connected to the tubular electrode and the wire electrode.

[0015] The beneficial effects of the utility model are:

[0016] The blade head and plasma scalpel provided by the utility model are not prone to suction blockage or suction dispersion, and the suction effect is better; and because the suction through hole has a sharp corner, strong discharge can be caused around it, which can cut the lesion tissue into smaller pieces and make it easier for waste tissue to pass through the suction through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. As shown in the drawings, the above and other purposes, features and advantages of the utility model will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled according to the actual size, and the focus is on showing the main purpose of the utility model.

[0018] Figure 1A schematic diagram of the structure of a plasma scalpel provided in an embodiment of the utility model;

[0019] Figure 2 A reference diagram of the use state of the plasma scalpel provided in the embodiment of the utility model;

[0020] Figure 3 for Figure 1 A partial enlarged schematic diagram of part A;

[0021] Figure 4 for Figure 3 A structural diagram from another perspective;

[0022] Figure 5 A schematic structural diagram of an insulating seat of a plasma surgical knife provided in an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the structure of a sheet electrode of a plasma surgical knife provided in an embodiment of the utility model Figure 1 ;

[0024] Figure 7 A schematic diagram of the structure of a sheet electrode of a plasma surgical knife provided in an embodiment of the utility model Figure 2 ;

[0025] Figure 8 A schematic structural diagram of a plug for a plasma surgical knife provided in an embodiment of the utility model.

[0026] Icons: 10-plasma scalpel; 110-handle; 111-nerve detector; 112-warning light; 113-suction tube; 114-plug; 120-knife head; 121-tubular electrode; 122-insulating seat; 123-sheet electrode; 124-filament electrode; 130-first electrode; 131-second electrode; 132-insulating layer; 133-suction hole; 134-suction through hole; 135-protrusion; 136-auxiliary through hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0031] Please refer to Figure 1 , Figure 2 As shown, the embodiment of the utility model provides a plasma scalpel 10, which can be used in conjunction with a radio frequency host, a foot switch and an aspirator, etc., and is mainly used for UBE procedures, and is used for ablation and cutting of human spinal tissue, coagulation and hemostasis, etc. The UBE procedure is a new type of minimally invasive procedure, which refers to a spinal surgery under a unilateral double-channel endoscope, and can be applied to various types of lumbar disc herniation, spinal stenosis and mild lumbar spondylolisthesis, etc.

[0032] The radio frequency host refers to a radio frequency plasma surgical device. The radio frequency host is electrically connected to the plasma electrode and controlled by a foot switch. The suction device is connected to the plasma electrode and is used for negative pressure suction.

[0033] The structures of the radio frequency host, the foot switch and the suction device, and the corresponding connection relationship can refer to the prior art, and will not be described in detail here. The foot switch and the plasma electrode can be controlled separately without interfering with each other.

[0034] The plasma surgical knife 10 can be manufactured and sold independently of a radio frequency host, a foot switch, an aspirator, and the like.

[0035] First of all, it should be noted that the "front" and "back" mentioned in this embodiment are defined based on the positional relationship with the lesion site, that is, close to the lesion site is "front" and far from the lesion site is "back".

[0036] Specifically, the plasma surgical knife 10 includes a handle assembly and a blade head 120 , and a rear end of the blade head 120 is connected to the handle assembly.

[0037] The structure of the handle assembly can be adopted but not limited to the following solutions: Figure 1 As shown, the handle assembly includes a handle 110, a nerve detector 111 (please refer to Figure 3 , Figure 4as shown) and suction tube 113.

[0038] The handle 110 is mainly used for holding. The shape and structure of the handle 110 are not limited and can refer to the prior art.

[0039] The nerve detector 111 extends from the front end of the cutter head 120 , and the nerve detector 111 is adjacent to the working surface of the cutter head 120 , the front end of the nerve detector 111 is in contact with the outer surface of the cutter head 120 , and the outer side of the nerve detector 111 can be covered with insulating material.

[0040] A warning light 112 is provided on the handle 110. The size and position of the warning light 112 are not limited. In the present embodiment, the diameter of the warning light 112 is 2 mm-6 mm, preferably 3 mm. The warning light 112 is close to the front end of the handle 110. The distance between the warning light 112 and the front end of the handle 110 is 1 cm-5 cm, preferably 2 cm. The warning light 112 can be located on the back of the handle 110, and the warning light 112 protrudes 1-5 mm from the surface of the handle 110, preferably 2 mm. The warning light 112 displays the detection result of the nerve detector 111 by changing the color and the frequency of on and off. For example, when the front end of the electrode assembly is close to the nerve, the nerve detector 111 can detect the nerve, the host will make a sound, and the warning light 112 will alarm to prompt the doctor to pay attention. When the distance to the nerve is 3cm-2cm, the host can beep once, and the warning light 112 is green and always on; when the distance to the nerve is 2cm-1cm, the host can beep twice, and the warning light 112 is yellow and always on; when the distance to the nerve is 1cm-5mm, the host can beep three times, and the warning light 112 is yellow and flashing; when the distance to the nerve is ≤5mm, the host keeps beeping, and the warning light 112 is red and flashing. Such a setting will give the doctor a prompt, and the doctor can easily judge the distance between the front end of the electrode assembly and the nerve, so as to adjust the position according to the actual situation to prevent electrical stimulation; the nerve detector 111 and the warning light 112 can prompt while the plasma electrode is working, which can not only facilitate the doctor to perform surgery, but also not delay the search for the nerve location, which can greatly improve the efficiency of the operation, reduce the operation time, and reduce the pain of the patient. The warning light 112 and the host alarm at the same time, which can prevent the doctor from missing the sound alarm, and the prompt can be seen intuitively. Of course, in some embodiments, it is also possible for the host not to alarm.

[0041] Please combine Figure 3 , Figure 4 As shown, the cutter head 120 includes a tubular electrode 121 , an insulating seat 122 , a sheet electrode 123 and a wire electrode 124 .

[0042] The tubular electrode 121 is tubular, and may be a round tube, a square tube, an elliptical tube, etc., and is hollow inside, and may or may not have openings at both ends. The material of the tubular electrode 121 may be a metal material that is conductive. The tubular electrode 121 includes a first electrode 130 and a second electrode 131, wherein the first electrode 130 is tubular and is coated with an insulating layer 132 on the outside, and the second electrode 131 is disposed at the front end of the first electrode 130, and the front end of the second electrode 131 may be spherical.

[0043] The rear end of the first electrode 130 is connected to the handle 110 , and the connection method between the two is not limited, such as plugging, welding, integral molding, etc. The suction tube 113 is inserted into the first electrode 130 .

[0044] The insulating layer 132 is made of insulating material and covers the outer side of the first electrode 130, wherein the front end of the first electrode 130 and the second electrode 131 are exposed. The neural detector 111 can be disposed between the insulating layer 132 and the first electrode 130 and exposed from the front end of the insulating layer 132.

[0045] A notch is disposed on one side of the second electrode 131 , and the size of the notch is not limited and can refer to the prior art.

[0046] The insulating seat 122 is made of insulating material. The insulating seat 122 is connected to the second electrode 131 to form a boss. The connection method between the two is not limited. The insulating seat 122 closes the gap of the second electrode 131 .

[0047] The shape of the insulating seat 122 is not limited. For example, the insulating seat 122 can be cylindrical, elliptical, prism, etc. Figure 5 As shown, the insulating seat 122 is provided with a suction hole 133, which may be L-shaped, and the suction through hole 134 includes an axial section and a radial section, the diameter of the radial section is 0.4mm-2.2mm, preferably 1.6mm, and the front end of the suction tube 113 can be inserted into the suction hole 133, and the suction tube 113 is used for negative pressure suction. A plurality of small holes may be provided around the radial section, the number of small holes is 2-5, preferably 2, and the small holes are used to pass the filament electrode 124, and the diameter of the small holes is 0.2mm-0.8mm, preferably 0.6mm.

[0048] The sheet electrode 123 is disposed on the insulating seat 122. Figure 6 , Figure 7 As shown, the sheet electrode 123 is sheet-shaped, and the thickness of the sheet electrode 123 is 0.1 mm-0.5 mm, preferably 0.3 mm. The sheet electrode 123 can be circular, and its diameter is 2.0 mm-5.0 mm, preferably 3.3 mm.

[0049] The central part of the sheet electrode 123 is provided with a suction through hole 134, which is opposite to the suction hole 133, and the diameter of the suction through hole 134 is smaller than the size of the insulating seat 122, and the diameter of the suction through hole 134 is smaller than the diameter of the suction hole 133. This arrangement increases the area of ​​the hollow hole of the sheet electrode 123, allowing more and larger tissues to pass through, and does not cause the situation of dispersed attraction, so that the attraction can be fully effective; since the size of the suction through hole 134 is smaller than the size of the suction hole 133, the attraction will be increased, and the tissue that can pass through the suction through hole 134 will definitely pass through the suction hole 133 smoothly.

[0050] The diameter of the suction through hole 134 is 0.3mm-2.0mm, preferably 1.2mm. The suction through hole 134 has several sharp corners, which can be acute angles, right angles or obtuse angles, etc. Specifically, the sharp corners can adopt but are not limited to the following schemes: a plurality of protrusions 135 are provided in the suction through hole 134, the number of the protrusions 135 is not limited, the protrusions 135 extend toward the inside of the suction through hole 134, and the protrusions 135 form sharp corners. The sharp corners can make the surroundings of the suction through hole 134 discharge strongly, cut the lesion tissue smaller, so that the waste tissue can pass through the suction through hole 134 more easily.

[0051] The shape of the suction through hole 134 is not limited, that is, the shape of the protrusion 135 is not limited. For example, the protrusion 135 can be a triangle, a rectangle, a polygon, etc., so that the suction through hole 134 presents a star shape, a cross shape, a polygon, etc.

[0052] A plurality of auxiliary through holes 136 may be arranged around the attraction through hole 134, and the filament electrode 124 is passed through the auxiliary through holes 136. The auxiliary through holes 136 include bar holes, triangular holes and circular holes. The number of bar holes, triangular holes and circular holes may be set as needed, and the triangular holes and circular holes are arranged alternately.

[0053] The number of the wire electrodes 124 is not limited and can be set as needed. The wire electrodes 124 are wire-shaped, and the diameter of the electrode wire is 0.1mm-2mm, preferably 0.3mm. Among them, the wire electrode 124 is inserted into the sheet electrode 123 and extends into the first electrode 130 through the insulating seat 122. In this embodiment, the wire electrode 124 can be inserted into the circular auxiliary through hole 136, and the wire electrode 124 can penetrate the insulating seat 122 and extend into the first electrode 130. The wire electrode 124 fixes the sheet electrode 123 on the insulating seat 122. The wire electrode 124 can be connected to a wire, an electrode wire, etc., and the wire, the electrode wire, etc. are inserted into the first electrode 130.

[0054] In addition, the handle assembly may also include a plug 114 for powering on. Figure 8As shown, the first electrode 130, the sheet electrode 123, the wire electrode 124, the nerve detector 111 and the warning light 112 are respectively connected to different pins of the plug 114. The number of pins of the plug 114 is 3-27, preferably 10 pins or 18 pins.

[0055] The plasma scalpel 10 provided in this embodiment is installed in conjunction with a radio frequency host, a foot switch, and an aspirator to form a plasma system. When the plasma system is in use, the front end of the plasma knife head 120 is inserted into a specified position so that the sheet electrode 123 and the filament electrode 124 are adjacent to the lesion tissue, and the sheet electrode 123 is opposite to the lesion tissue, thereby ablating, cutting, coagulating, and stopping bleeding the lesion tissue. Under the negative pressure suction of the aspirator, soft tissue debris and bubbles can enter the suction tube 113 through the suction through hole 134 and the suction hole 133 and be discharged, thereby ensuring a clear field of view and reducing the temperature around the knife head 120.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blade of a plasma surgical knife, used for UBE procedure, characterized in that: It includes a tubular electrode, an insulating seat, a sheet electrode and a wire electrode. A notch is arranged on one side of the front end of the tubular electrode. The insulating seat is embedded in the notch and has a suction hole. The sheet electrode is arranged on the insulating seat. The wire electrode passes through the sheet electrode. A suction through hole is arranged at the center of the sheet electrode. Several sharp corners are arranged in the suction through hole.

2. The blade head of the plasma surgical knife according to claim 1, characterized in that: The tubular electrode comprises a first electrode and a second electrode. The sheet electrode is tubular and is covered with an insulating layer on the outside. The second electrode is arranged at the front end of the first electrode. The notch is arranged at one side of the second electrode.

3. The blade head of the plasma surgical knife according to claim 1, characterized in that: The front end of the tubular electrode is spherical.

4. The blade head of the plasma surgical knife according to claim 1, characterized in that: A plurality of protrusions extending inwards are arranged in the suction through hole, and the protrusions form sharp corners.

5. The blade head of the plasma surgical knife according to claim 1, characterized in that: A plurality of auxiliary through holes are arranged around the attraction through hole, and the wire-shaped electrodes are inserted into the auxiliary through holes. The auxiliary through holes include strip holes, and triangular holes and circular holes that are alternately arranged.

6. A plasma surgical knife, characterized in that: It comprises a handle and a cutter head according to any one of claims 1 to 5, wherein the rear end of the cutter head is connected to the handle.

7. The plasma surgical knife according to claim 6, characterized in that: The plasma surgical knife further comprises a nerve detector, the front end of which is exposed and adjacent to the sheet electrode.

8. The plasma surgical knife according to claim 7, characterized in that: The handle is provided with a warning light, and the warning light displays the detection result of the nerve detector by changing color and on and off frequency.

9. The plasma surgical knife according to claim 6, characterized in that: The plasma surgical knife further comprises a suction tube and a plug, wherein the suction tube is communicated with the suction hole, and the plug is electrically connected with the tubular electrode and the wire electrode.

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