A blade and plasma scalpel

Abstract

The application relates to a knife head and a plasma scalpel, and belongs to the technical field of medical instruments for surgery. The plasma scalpel comprises a handle and a knife head, the knife head comprises a first electrode, a second electrode, a first insulating layer and a second insulating layer, the end of the first electrode is provided with a main body part and a flared part, the second insulating layer is sleeved outside the first insulating layer, and part of the second insulating layer is inserted into the flared part. The end of the first electrode of the knife head is formed in a trumpet mouth shape, a second insulating layer is additionally arranged between the flared part and the second electrode, the insulation between the first electrode and the second electrode is enhanced, the service life of the knife head is prolonged, and the use effect of the knife head is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of surgical medical device technology, specifically relating to a blade and a plasma surgical scalpel. Background Technology

[0002] Radiofrequency plasma scalpels can use ultra-low frequency electrical energy to excite sodium chloride molecules in blood, mucous membranes, and soft tissues to generate a plasma state. Within the temperature range of 40-70°C, where proteins undergo reversible denaturation, molecular bonds are broken, directly decomposing proteins and other biomolecules into gases such as oxygen, carbon dioxide, or nitrogen. This allows for multiple functions such as cutting, drilling, ablation, shrinkage, and hemostasis of tissues at the cost of "minimally invasive" procedures, and has therefore been widely used in clinical practice.

[0003] Existing radiofrequency plasma surgical scalpels have relatively short lifespans for the two electrodes on the scalpel tip. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a cutting head that increases the end diameter of the first electrode, forming a flared shape at the end of the first electrode, thereby adding a second insulating layer between the flared portion and the second electrode, enhancing the insulation between the first electrode and the second electrode, extending the service life of the cutting head, and effectively improving the performance of the cutting head.

[0005] Another objective of this invention is to provide a plasma scalpel that can effectively enhance the insulation performance between the first and second electrodes, extend the service life of the scalpel tip, and improve the performance of the scalpel tip.

[0006] The embodiments of the present invention are implemented as follows:

[0007] This invention provides a cutting head, which includes a first electrode, a second electrode, a first insulating layer, and a second insulating layer. The second electrode passes through the interior of the first electrode and extends out of the first electrode. The first insulating layer is sleeved on the second electrode and separates the second electrode from the first electrode.

[0008] The first electrode has a main body and a flared part at its end. The cross-sectional area of ​​the flared part is larger than that of the main body. The second insulating layer is sleeved on the outside of the first insulating layer, and a portion of the second insulating layer is inserted into the flared part.

[0009] As an optional embodiment of the above, the first electrode further includes a gradient portion located between the main body portion and the flared portion. The outer surface of the first electrode is covered with a third insulating layer. The diameter of the gradient portion gradually increases from the proximal end to the distal end. The second insulating layer abuts against the gradient portion, and the third insulating layer covers the main body portion and the gradient portion.

[0010] As an optional embodiment of the above, the end of the second electrode is provided with an electrode head, the ends of the first insulating layer and the second insulating layer respectively abut against the electrode head, the electrode head includes a first head and a second head, the first head is closer to the second electrode than the second head, and in the direction from the proximal end to the distal end, the cross-sectional area of ​​the first head gradually increases, and the cross-sectional area of ​​the second head gradually decreases and forms a tip.

[0011] A 100μm-130μm plasma layer can be formed around the tip of the blade. The strong electric field gives the plasma enough kinetic energy to break molecular bonds, causing the target tissue to disintegrate at the molecular level. This results in cutting and ablation effects at low temperatures, effectively improving the ablation, coagulation, and hemostasis effects on the tissue.

[0012] As an optional embodiment of the above, both the second head and the first head have circular cross-sections, the generatrix of the first head bends away from the center of the electrode head, and the generatrix of the second head bends towards the center of the electrode head.

[0013] As an optional embodiment of the above, the cutting head further includes a third electrode, which is sleeved outside the first electrode and the flared portion is located outside the third electrode.

[0014] The third electrode can enhance the strength of the cutting head and prevent it from bending during use. In addition, the third electrode can also act as an electrode, working together with the first and second electrodes to form a three-electrode structure for the cutting head, thus achieving two different functions.

[0015] As an optional embodiment of the above, the cutter head further includes a positioning member, which is movably disposed on the third electrode so that the positioning member is selectively fixed at different positions on the third electrode.

[0016] The positioning element mainly serves a positioning function. When the blade is working, it needs to be used in conjunction with the puncture needle and the guide needle. The positioning element can hold the guide needle in place, allowing the doctor to directly observe the depth of the blade insertion and preventing the blade from being inserted too deeply.

[0017] The position of the positioning element on the third electrode is adjustable, so that the insertion size of the cutter head can be selected as needed.

[0018] As an optional embodiment of the above, the positioning element includes a torsion spring and two pinch ears. The third electrode is a cylindrical structure. The torsion spring is slidably sleeved on the third electrode. The two pinch ears are adjacent to each other and are located at both ends of the torsion spring. The relative position between the two pinch ears is adjustable so that the torsion spring has an adjustable state in which it unfolds under the action of external force and can slide along the third electrode, and a positioning state in which it contracts and is locked and fixed to the third electrode without the action of external force.

[0019] Pinch the two tabs to change their relative position, which increases the diameter of the torsion spring and creates a gap between the torsion spring and the third electrode. The position of the torsion spring is adjustable. When the tabs are released, the torsion spring returns to its original position, and its diameter decreases, allowing it to be locked onto the third electrode and its position to remain fixed. This achieves the fixation of the positioning component, making the operation simple and convenient.

[0020] As an optional embodiment of the above, the torsion spring is provided with connecting arms at both ends, and the pinch lug is provided at the end of the connecting arm. With a plane perpendicular to the center line of the third electrode as the reference plane, the projections of the two connecting arms in the reference plane intersect in an X shape.

[0021] The two X-shaped connecting arms allow the torsion spring to unfold simply by bringing the two pinch ears close together when pinching them, making it easy to operate with one hand and simplifying the operation.

[0022] As an optional embodiment of the above, the third electrode is made of an electrode material, and a third insulating layer is provided between the third electrode and the first electrode.

[0023] The third insulating layer can prevent the third electrode from interfering with the second and first electrodes.

[0024] As an optional embodiment of the above, the end of the cutter head is bent, and the angle of the bend at the end of the cutter head is in the range of 2°-8°.

[0025] The curved tip of the cutter head allows the electrode head to face different directions, adapting to different locations.

[0026] As an optional embodiment of the above, the angle of bending at the tip of the cutter head is 5°.

[0027] This invention also provides a plasma scalpel, which includes a handle and the aforementioned blade, one end of which is connected to the handle.

[0028] The beneficial effects of this invention are:

[0029] The plasma scalpel provided by this invention mainly consists of a handle and a blade. The end of the first electrode of the blade is formed into a trumpet shape, thereby adding a second insulating layer between the flared part and the second electrode, which enhances the insulation between the first electrode and the second electrode, increases the service life of the blade, and effectively improves the performance of the blade. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0031] Figure 1 A schematic diagram of the structure of a cutting head provided in the first embodiment of the present invention is shown;

[0032] Figure 2 A schematic diagram of the end structure of the cutter head is shown;

[0033] Figure 3 It shows Figure 2 A magnified view of a portion of the image;

[0034] Figure 4 A schematic diagram of the positioning component is shown;

[0035] Figure 5 A structural schematic diagram of the positioning component is shown from another perspective.

[0036] Figure 6 A schematic diagram of a plasma surgical knife provided in the second embodiment of the present invention is shown.

[0037] icon:

[0038] 10-Plasma Surgical Knife;

[0039] 11-Handle; 12-Cutter head;

[0040] 110-Cable; 111-Plug; 120-First electrode; 121-Second electrode; 122-First insulating layer; 123-Second insulating layer; 124-Third electrode; 125-Third insulating layer; 126-Scale area; 127-Main body; 128-Flanged part; 129-Gradual transition part; 130-Electrode head; 131-First head; 132-Second head; 140-Positioning element; 141-Torsion spring; 142-Pinch ear; 143-Connecting arm. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] First Embodiment

[0046] Please refer to Figure 1 As shown, the first embodiment of the present invention provides a blade 12, which is a component of a plasma scalpel and is used to ablate and coagulate human tissue for hemostasis. In this embodiment, the blade 12 is used to ablate and coagulate human joint and spinal tissue for hemostasis.

[0047] In this regard, please combine Figure 2 As shown, the cutter head 12 includes a first electrode 120, a second electrode 121, a first insulating layer 122, a second insulating layer 123, a third electrode 124, and a positioning member 140.

[0048] The end of the cutter head 12 can be bent, and the bending angle of the end of the cutter head 12 is in the range of 2°-8°. For example, the bending angle of the end of the cutter head 12 can be 2°, 3.5°, 5°, 6.5°, 8°, etc. In this embodiment, the bending angle of the end of the cutter head 12 is 5°. According to the test results in actual application, the bending angle of the end of the cutter head 12 is 5°, which has the best effect.

[0049] The tip of the cutter head 12 is bent so that the electrode head 130 can be oriented in different directions to adapt to different parts.

[0050] Specifically, the first electrode 120 can adopt a tubular structure, such as a square tube or a round tube. In this embodiment, the first electrode 120 adopts a circular tubular structure.

[0051] Specifically, the end of the first electrode 120 is provided with a main body 127, a gradient part 129 and a flared part 128 in sequence.

[0052] The cross-sectional area of ​​the flared portion 128 is larger than that of the main body portion 127. Since the first electrode 120 adopts a tubular structure, the diameter of the flared portion 128 is larger than that of the main body portion 127.

[0053] It should be noted that the wall thickness of the first electrode 120 is basically the same at all points. Therefore, the above scheme is a limitation made without considering the wall thickness of the first electrode 120. If the wall thickness of the first electrode 120 is considered, there are two meanings: First, the cross-sectional area of ​​the inner surface of the flared portion 128 is greater than the cross-sectional area of ​​the inner surface of the main body 127, that is, the inner diameter of the flared portion 128 is greater than the inner diameter of the main body 127; Second, the cross-sectional area of ​​the inner surface of the flared portion 128 is greater than the cross-sectional area of ​​the inner surface of the main body 127 and the cross-sectional area of ​​the outer surface of the flared portion 128 is greater than the cross-sectional area of ​​the outer surface of the main body 127, that is, the inner diameter of the flared portion 128 is greater than the inner diameter of the main body 127 and the outer diameter of the flared portion 128 is greater than the outer diameter of the main body 127.

[0054] The second insulating layer 123 is sleeved on the outside of the first insulating layer 122, and a portion of the second insulating layer 123 is inserted into the flared portion 128.

[0055] The outer surface of the first electrode 120 is covered with a third insulating layer 125.

[0056] The diameter of the gradient section 129 gradually increases from the proximal end to the distal end.

[0057] The second insulating layer 123 abuts against the gradient portion 129, the third insulating layer 125 covers the main body portion 127 and the gradient portion 129, and the flared portion 128 is exposed.

[0058] The third insulating layer at position 125 is designed to facilitate puncture, thus avoiding the safety hazard of damage during puncture and use, leaving fragments inside the body.

[0059] The second electrode 121 can adopt a tubular or rod-shaped structure. The second electrode 121 is inserted inside the first electrode 120, and one end of the second electrode 121 extends out of the first electrode 120.

[0060] A first insulating layer 122 is disposed between the second electrode 121 and the first electrode 120. The first insulating layer 122 is used for insulation, so that the end of the second electrode 121 and the first electrode 120 are separated.

[0061] The end of the second electrode 121 is provided with an electrode head 130, which is used to interact with the first electrode 120 to form a plasma thin layer.

[0062] The ends of the first insulating layer 122 and the second insulating layer 123 respectively abut against the electrode head 130. The gradient portion 129 and the electrode head 130 work together to limit the position of the second insulating layer 123 and prevent the second insulating layer 123 from sliding.

[0063] Please refer to Figure 3 As shown, the electrode head 130 includes a first head 131 and a second head 132, with the first head 131 being closer to the second electrode 121 than the second head 132.

[0064] In the direction from the proximal end to the distal end, the cross-sectional area of ​​the first head 131 gradually increases, while the cross-sectional area of ​​the second head 132 gradually decreases and forms a tip.

[0065] It should be noted that, in this embodiment, "proximal end" refers to the end of the structure that is closer to the handle 11, and "distal end" refers to the end of the structure that is farther away from the handle 11.

[0066] In this embodiment, the cross-sections of the second head 132 and the first head 131 are both circular. The generatrix of the first head 131 bends away from the center of the electrode head 130, and the generatrix of the second head 132 bends towards the center of the electrode head 130. That is, the middle part of the first head 131 protrudes outward, and the middle part of the second head 132 is concave inward.

[0067] The electrode head 130 is generally shaped like a trumpet. Of course, in other embodiments, the first head 131 is shaped like a frustum, the second head 132 is shaped like a cone, etc.

[0068] The second insulating layer 123 is sleeved on the outside of the first insulating layer 122.

[0069] Without the addition of a second insulation layer 123, the cutter head 12 can still function, but it is prone to short circuits and outgoing wire failures.

[0070] The third electrode 124 is sleeved outside the first electrode 120, and the flared portion 128 and the gradient portion 129 are located outside the third electrode 124.

[0071] In this embodiment, the outer diameter of the flared portion 128 can be slightly smaller than the outer diameter of the third electrode 124 to facilitate the puncture of the blade 12.

[0072] The third electrode 124 can enhance the strength of the cutter head 12 and prevent it from bending during use. It can also work with the first electrode 120 and the second electrode 121 to form a three-electrode structure for the cutter head 12, thus achieving two different functions. Of course, whether the third electrode 124 is used as an electrode can be selected as needed.

[0073] When the cutter head 12 has a two-electrode structure, the first electrode 120 is the circuit electrode and the second electrode 121 is the working electrode.

[0074] When the cutter head 12 has a three-electrode structure, the second electrode 121 is the working electrode, and the first electrode 120 can be used as an intermediate stage. The first electrode 120 and the third electrode 124 have opposite polarities, and they can be either working electrodes or circuit electrodes, respectively.

[0075] The third electrode 124 is made of electrode material, and the third insulating layer 125 can prevent the third electrode 124 from interfering with the second electrode 121 and the first electrode 120.

[0076] The third electrode 124 mainly serves to enhance the strength of the cutter head 12.

[0077] The positioning member 140 can be structured in the following way: the positioning member 140 is movably disposed on the third electrode 124 so that the positioning member 140 can be selectively fixed at different positions of the third electrode 124.

[0078] The structure of the positioning element 140 is not limited. For example, the positioning element 140 can be a clamp or the like, as long as it meets two conditions: First, the positioning element 140 can move along the third electrode 124; Second, the positioning rod can be fixed relative to the third electrode 124, so that the positioning rod cannot be fixed along the third electrode 124.

[0079] The positioning element 140 mainly serves a positioning function. When the blade head 12 is working, it needs to be used in conjunction with the puncture needle and the guide needle. The positioning element 140 can hold the guide needle in place, allowing the doctor to directly observe the insertion depth of the blade head 12 and prevent the blade head 12 from being inserted too deeply.

[0080] The position of the positioning element 140 on the third electrode 124 is adjustable, so that the insertion size of the cutter head 12 can be selected as needed.

[0081] In addition, a scale area 126 can be set on the third electrode 124, with scale markings inside the scale area 126 to facilitate doctors' observation and positioning.

[0082] This embodiment provides the following solution, please refer to it. Figure 4 As shown, the positioning element 140 includes a torsion spring 141 and two pinch lugs 142.

[0083] The third electrode 124 has a cylindrical structure, and the torsion spring 141 is slidably sleeved on the third electrode 124. Two pinch ears 142 are adjacent to each other and are located at both ends of the torsion spring 141.

[0084] The relative position between the two pinch ears 142 is adjustable. The pinch ears 142 can drive the two ends of the torsion spring 141 to move, thereby increasing the torque of the torsion spring 141.

[0085] Based on whether or not an external force acts on the pinch ear 142, the torsion spring 141 can be divided into an adjustment state and a positioning state.

[0086] The adjusted state of the torsion spring 141 means that when a force is applied to the pinch ear 142, the torsion spring 141 can unfold, that is, the torque of the torsion spring 141 increases, the diameter of the torsion spring 141 increases, the torsion spring 141 disengages from the surface of the third electrode 124, and the gap between the torsion spring 141 and the surface of the third electrode 124 allows the torsion spring 141 to slide along the third electrode 124.

[0087] The positioning state of the torsion spring 141 refers to the fact that after the pinch ear 142 is released, the torsion spring 141 returns to its initial state under its own torque, that is, the diameter of the torsion spring 141 decreases, the torsion spring 141 abuts against the surface of the third electrode 124, and the torsion spring 141 is locked onto the third electrode 124 and its position cannot be changed, thereby fixing the positioning component 140. The operation is simple and convenient.

[0088] To facilitate the control of the torsion spring 141, this embodiment provides the following solution, please refer to it. Figure 5 As shown, the torsion spring 141 has connecting arms 143 at both ends, and pinch ears 142 are provided at the ends of the connecting arms 143.

[0089] With the plane perpendicular to the center line of the third electrode 124 as the reference plane, the projections of the two connecting arms 143 on the reference plane intersect in an X shape.

[0090] The two X-shaped connecting arms 143 allow the torsion spring 141 to be unfolded simply by bringing the two pinch ears 142 close together when pinched, making it easy to operate with one hand and simplifying the operation.

[0091] Second Embodiment

[0092] Please refer to Figure 6As shown, the second embodiment of the present invention provides a plasma scalpel 10, which needs to be used in conjunction with a radio frequency plasma host for ablation, coagulation and hemostasis of human joint and spinal tissues. Its contraindications are the same as those of radio frequency plasma surgical equipment.

[0093] The plasma scalpel 10 mainly consists of a handle 11, a cable 110, a plug 111, and a blade 12.

[0094] The handle 11 is connected to the plug 111 via a cable 110, and one end of the blade 12 is connected to the handle 11.

[0095] The cutter head 12 can adopt the structure of the first embodiment.

[0096] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cutting head, characterized in that, The cutting head (12) includes a first electrode (120), a second electrode (121), a first insulating layer (122), and a second insulating layer (123). The second electrode (121) passes through the interior of the first electrode (120) and extends out of the first electrode (120). The first insulating layer (122) is sleeved on the second electrode (121) and separates the second electrode (121) from the first electrode (120). The first electrode (120) has a main body (127) and a flared part (128) at its end. The cross-sectional area of ​​the flared part (128) is larger than that of the main body (127). The second insulating layer (123) is sleeved on the outside of the first insulating layer (122), and a part of the second insulating layer (123) is inserted into the flared part (128). The first electrode further includes a gradient portion (129) located between the main body portion (127) and the flared portion (128). The outer surface of the first electrode (120) is covered with a third insulating layer (125). The diameter of the gradient portion (129) gradually increases from the proximal end to the distal end. The second insulating layer (123) abuts against the gradient portion (129). The third insulating layer (125) covers the main body portion and the gradient portion. The end of the second electrode (121) is provided with an electrode head (130). The ends of the first insulating layer (122) and the second insulating layer (123) respectively abut against the electrode head (130). The electrode head (130) includes a first head (131) and a second head (132). The first head (131) is closer to the second electrode (121) than the second head (132). In the direction from the proximal end to the distal end, the cross-sectional area of ​​the first head (131) gradually increases, and the cross-sectional area of ​​the second head (132) gradually decreases and forms a tip. The cross-sections of the second head (132) and the first head (131) are both circular. The generatrix of the first head (131) bends away from the center of the electrode head (130), and the generatrix of the second head (132) bends towards the center of the electrode head (130).

2. The cutting head according to claim 1, characterized in that, The cutting head (12) also includes a third electrode (124), which is sleeved outside the first electrode (120) and the flared part (128) is located outside the third electrode (124).

3. The cutting head according to claim 2, characterized in that, The cutter head (12) also includes a positioning element (140), which is movably disposed on the third electrode (124) so ​​that the positioning element (140) can be selectively fixed at different positions of the third electrode (124).

4. The cutting head according to claim 3, characterized in that, The positioning element (140) includes a torsion spring (141) and two flaps (142). The third electrode (124) is a cylindrical structure. The torsion spring (141) is slidably sleeved on the third electrode (124). The two flaps (142) are adjacent and located at both ends of the torsion spring (141). The relative position between the two flaps (142) is adjustable so that the torsion spring (141) has an adjustable state in which it unfolds under external force and can slide along the third electrode (124), and a positioning state in which it contracts and is locked and fixed to the third electrode (124) without external force.

5. The cutting head according to claim 4, characterized in that, The torsion spring (141) has connecting arms (143) at both ends, and the pinch ear (142) is located at the end of the connecting arm (143). The plane perpendicular to the center line of the third electrode (124) is used as the reference plane, and the projections of the two connecting arms (143) in the reference plane intersect in an X shape.

6. The cutting head according to claim 1, characterized in that, The end of the cutter head (12) is bent, and the angle of the bend at the end of the cutter head (12) is in the range of 2°-8°.

7. A plasma surgical scalpel, characterized in that, The plasma scalpel (10) includes a handle (11) and a blade (12) as described in any one of claims 1-6, one end of the blade (12) being connected to the handle (11).

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