Medical handle and plasma scalpel
By designing a medical handle with adjustable electrode tip length, the problem of difficulty in surgical positioning of existing plasma scalpels in complex areas is solved, precise surgical positioning is achieved, and surgical efficiency and safety are improved.
Patent Information
- Application Number
- CN202420576107.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-03-25
AI Technical Summary
The electrode structure of the existing plasma scalpel is simple, and the working length and angle of the electrode blade cannot be adjusted, resulting in difficulty in surgical positioning in complex areas, and prone to adverse phenomena such as miscut, multiple cuts, and leaks, reducing surgical efficiency and safety.
A medical handle is designed, including the main body, pushing assembly and stopping assembly. By pushing the assembly to drive the working catheter to slide, the electrode cutting head length can be adjusted, and the complex parts can be accurately positioned based on the same plasma scalpel.
By adjusting the length of the electrode tip, precise surgical positioning can be performed in complex parts, reducing the risk of miscut, multiple cuts, and miscuts, improving surgical efficiency, reducing doctors' fatigue, saving surgical time, and reducing treatment costs.
Smart Images
Figure CN222708375U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a medical handle and a plasma scalpel. Background Art
[0002] Plasma scalpels are widely used in surgical operations. They can not only cut and ablate human lesions, but also coagulate and stop bleeding. However, the electrode structure on the market is often relatively simple. The working length or angle position distance of the electrode rod cannot be adjusted during operation, so the operation is relatively limited. In this case, if the patient's part is relatively complex, the electrode head cannot achieve precise positioning of the operation. Due to the working length of the front end of the electrode head, the angle direction distance cannot reach, etc., it is impossible to perform effective surgery on the lesion tissue, and adverse phenomena such as miscutting, overcutting, and missing cutting may occur, resulting in a large area of trauma to the patient's surgical site, and causing great psychological pain to the patient. Therefore, it is necessary to use different types of surgical electrodes alternately to complete the operation, which is very troublesome for doctors, has low safety and effectiveness of the operation, takes a long time, and has low efficiency. At the same time, it also increases the safety risks brought by the operation and the treatment cost is high. Summary of the invention
[0003] In view of this, the purpose of the utility model is to provide a medical handle and a plasma scalpel, which can adjust the length of the blade at the front end of the medical handle. There is no need to frequently replace the plasma scalpel. On the basis of the same plasma scalpel, precise surgical positioning of complex parts can be achieved, and adverse phenomena such as miscutting, overcutting, and missed cutting are not likely to occur. The risk of surgical operation is reduced, the surgical efficiency is improved, the doctor's fatigue is reduced, the operation time is saved, the pain of the patient is relieved, and the treatment cost is reduced.
[0004] The technical solution of the utility model is as follows:
[0005] The utility model provides a medical handle, comprising a main body and a pushing component and a stopping component arranged on the main body; the main body comprises a shell and a fixed tube and a working catheter connected to the shell, and the working catheter is slidably inserted into the fixed tube; the pushing component is transmission-connected with the rear end of the working catheter and is used to drive the working catheter to slide; the stopping component can lock the pushing component or the working catheter.
[0006] As an optional solution, the pushing assembly includes a gear and a rack that mesh with each other, the gear is rotatably disposed on the housing, and the rack is connected to the rear end of the working catheter in the same direction.
[0007] As an option, a portion of the gear is exposed from the housing.
[0008] As an optional solution, the stop assembly includes a metal spring, one end of which can be inserted into or disengaged from the gear.
[0009] As an optional solution, the stop assembly includes a button and a stop member that are connected to each other, and the button is movably arranged on the shell to drive the stop member to move closer to or away from the pushing assembly.
[0010] As an optional solution, the stop member is detachably connected to the button.
[0011] As an optional solution, the stop member is connected to the button via a threaded fastener.
[0012] As an optional solution, the button is slidably disposed on the shell and exposed from the shell.
[0013] As an optional solution, the front end of the fixed tube is a straight tube.
[0014] As an optional solution, a bending portion is provided at the front end of the fixing tube, and the front end of the working conduit has a bending deformation section, and the deformation section corresponds to the bending portion.
[0015] As an optional solution, the shell includes a rear shell, a middle shell and a front shell connected in sequence, and the middle shell is relatively spliced by a separable first side shell and a second side shell.
[0016] As an optional solution, the pushing assembly and the stopping assembly are arranged between the first side shell and the second side shell.
[0017] The utility model also provides a plasma surgical knife, comprising an electrode and the above-mentioned medical handle, wherein the electrode is inserted into the medical handle and exposed from the front end of the working catheter.
[0018] The beneficial effects of the utility model are:
[0019] The medical handle and plasma scalpel provided by the utility model can adjust the length of the blade head at the front end of the medical handle. There is no need to frequently replace the plasma scalpel. On the basis of the same plasma scalpel, accurate surgical positioning of complex parts can be achieved, and adverse phenomena such as miscutting, overcutting, and missed cutting are less likely to occur. The risk of surgical operation is reduced, the surgical efficiency is improved, the doctor's fatigue is reduced, the operation time is saved, the pain of the patient is relieved, and the treatment cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] 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.
[0021] Figure 1 A schematic diagram of the structure of a plasma scalpel provided in an embodiment of the utility model;
[0022] Figure 2 for Figure 1 Schematic diagram of the local structure;
[0023] Figure 3 for Figure 2 Explosion diagram of
[0024] Figure 4 for Figure 1 Schematic diagram of the connection relationship between the water suction pipe, plug cable, fixed pipe and working conduit;
[0025] Figure 5 for Figure 2 Schematic diagram of the local structure of the back end;
[0026] Figure 6 for Figure 3 Schematic diagram of the local structure;
[0027] Figure 7 for Figure 1 A schematic diagram of one of the states;
[0028] Figure 8 for Figure 7 Schematic diagram of the front-end partial structure;
[0029] Fig. 9 for Figure 1 Another state diagram of ;
[0030] Fig.10 for Fig. 9 Schematic diagram of the front-end partial structure;
[0031] Fig.11 for Figure 7 Use state reference diagram;
[0032] Fig.12 for Fig. 9 Use the state reference diagram.
[0033] Icons: 10-plasma scalpel; 20-endoscope; 11-electrode; 12-medical handle; 110-working pole tip; 111-suction tube; 112-plug cable; 120-main body; 122-fixing tube; 123-working catheter; 124-rear shell; 125-middle shell; 126-front shell; 127-first side shell; 128-second side shell; 130-pushing assembly; 131-gear; 132-rack; 140-stop assembly; 141-button; 142-stop piece. DETAILED DESCRIPTION
[0034] 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.
[0035] 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.
[0036] 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.
[0037] Please refer to Figure 1 As shown, an embodiment of the utility model provides a plasma surgical knife 10, which is mainly used for plasma surgery.
[0038] The plasma scalpel 10 is mainly composed of a medical handle 12 and an electrode 11. The electrode 11 is inserted into the medical handle 12 and exposed from the front end of the medical handle 12. It should be noted that the medical handle 12 can be independently manufactured, sold and used without relying on the electrode 11, and the medical handle 12 is not necessarily applied to the plasma scalpel 10, but can also be applied to other surgical knives. The following is a detailed discussion of each component.
[0039] For details, please combine Figure 2 , Figure 3As shown, the medical handle 12 is mainly composed of a main body 120, a pushing assembly 130 and a stopping assembly 140, wherein the pushing assembly 130 and the stopping assembly 140 are arranged on the main body 120. First of all, it should be noted that the "front" and "rear" mentioned in this embodiment are defined by the distance from the surgical site, that is, the "front" is close to the surgical site and the "rear" is far from the surgical site. Of course, this definition is only an approximate definition and cannot be used as an absolute standard.
[0040] The main body 120 includes a shell, a fixed tube 122 and a working conduit 123. The rear end of the fixed tube 122 is connected to the shell. The working conduit 123 is axially slidable in the fixed tube 122. The rear end of the working conduit 123 can be inserted into the shell.
[0041] The structure, material and shape of the shell are not limited, and can refer to the prior art. In this embodiment, the following solutions can be adopted but not limited to: the shell includes a rear shell 124, a middle shell 125 and a front shell 126 connected in sequence, and the middle shell 125 is relatively spliced by a separable first side shell 127 and a second side shell 128. The connection method between the rear shell 124 and the middle shell 125, between the middle shell 125 and the front shell 126, and between the first side shell 127 and the second side shell 128 is not limited, such as welding, gluing, clamping, screw connection, etc.
[0042] In this embodiment, the shell can adopt but is not limited to the following schemes: the first side shell 127 and the second side shell 128, the rear shell 124, and the front shell 126 can all be open-molded plastic parts, and the two are connected to each other by a gluing process or an ultrasonic process. The front end of the second side shell 128 is connected to the front shell 126 by a gluing process, and the rear end of the second side shell 128 is connected to the rear shell 124 by a gluing process.
[0043] The first side shell 127 and the second side shell 128 may be embedded with a push assembly 130 and a stop assembly 140, etc. The rear shell 124 may be penetrated by components such as the water suction pipe 111 and the plug cable 112. The front shell 126 may be provided with a through hole, and the rear end of the fixed tube 122 may be inserted into the through hole. The two may be connected by a gluing process or other processes, and the exposed length of the fixed tube 122 is fixed.
[0044] In some other embodiments, the shell may be formed in one piece, or may be formed by splicing two left and right half shells.
[0045] Please combine Figure 4 , Figure 5As shown, the water suction pipe 111 and the like are optional parts, which can be determined according to whether the design requirements of the plasma scalpel 10 require a water outlet function. The material of the water suction pipe 111 is not limited, and can be a polymer plastic material, a metal material, etc. The water suction pipe 111 is connected to the rear shell 124 through a connector, and the connection method between the water suction pipe 111 and the connector, and the connector and the rear shell 124 is not limited, for example, they can be seamlessly bonded together using a viscose process. The water suction pipe 111 runs through the rear shell 124, and the front end of the water suction pipe 111 is adapted and bonded to the corresponding empty position of the working pole head end 110 by a viscose method, etc. The rear end of the water suction pipe 111 is connected to the pipe head, and can be plugged into an aspirator device, etc. The working pole head end 110 can be composed of multiple parts, such as processed metal electrode wire, insulating solid material, etc. The tail end of the metal electrode wire can be connected to the working pole of the plug cable by welding or other methods, the middle insulating solid material can be connected to the water suction pipe 111, and the head end face position can be connected to the front end of the working conduit 123 by gluing or other methods.
[0046] The plug cable 112 is composed of a plug and a cable, the plug can be connected to the RF plasma host, the rear end of the cable is connected to the plug, the front working pole and the return pole, the working pole is connected to the metal electrode wire of the working pole head end 110, the return pole is connected to the working catheter 123, etc., and the connection method can be connected by welding or the like, and a part of the cable can pass through the rear shell 124. Of course, in other embodiments, the connection method of the working pole and the return pole with the medical handle 12 can also adopt other schemes, such as the working pole and the return pole are interchangeable.
[0047] The style of the fixed tube 122 is not limited, for example, the fixed tube 122 is a square tube, a round tube, a flat tube, etc., and both ends of the fixed tube 122 are open. In some embodiments, the fixed tube 122 can be a straight tube, so that the opening of the fixed tube 122 faces straight ahead; in some embodiments, the front end of the fixed tube 122 can also be bent, that is, the front end of the fixed tube 122 has a bending portion, so that the opening of the fixed tube 122 faces one side of the fixed tube 122, and the bending angle of the bending portion is not limited and can be set as needed, such as 5°, 10°, 20°, 30°, etc.
[0048] The material of the fixed tube 122 is not limited, for example, plastic material, etc. In the present embodiment, the fixed tube 122 can be made of a metal material such as a stainless steel pipe. An insulating layer can be provided on the inner side and / or outer side of the fixed tube 122. The insulating layer can be a heat shrinkable insulating sleeve or an insulating coating, etc. The insulating layer is used to insulate from the live part of the electrode 11 to prevent the operator from getting an electric shock.
[0049] The style of the working conduit 123 is not limited, such as a square tube, a round tube, a flat tube, etc. The style of the working conduit 123 generally needs to match the fixed tube 122. The material of the working conduit 123 is not limited, such as a plastic material, etc. In this embodiment, the working conduit 123 can be made of a metal material such as a stainless steel pipe.
[0050] The working conduit 123 is passed through the fixed tube 122. The length of the working conduit 123 can be greater than the length of the fixed tube 122. The working conduit 123 runs through the entire fixed tube 122. The rear end of the working conduit 123 extends from the rear end of the fixed tube 122 and extends into the shell. The front end of the working conduit 123 can extend from the front end of the fixed tube 122. Of course, in some conditions, it is also possible for the front end of the working conduit 123 to be retracted to the inside of the front end of the fixed tube 122.
[0051] The working conduit 123 can slide along its own axial direction in the fixed tube 122, that is, the working conduit 123 can move forward or backward, and the length of the working conduit 123 exposed from the front end of the fixed tube 122 can be adjusted.
[0052] The front end side of the working conduit 123 may be hole-free, or may be processed into multiple holes or multiple spiral cuts. The electrode 11 is disposed in the working conduit 123, and the electrode 11 is exposed from the front end of the working conduit 123 and forms a blade. The front end of the working conduit 123 is connected to the working pole end 110 of the electrode 11, and the connection method between the two is not limited, for example, the two are fixedly connected by adhesive.
[0053] The shape of the working conduit 123 needs to match the shape of the fixed tube 122. For example, if the fixed tube 122 is a straight tube, the working conduit 123 is also a straight tube. Of course, a pre-bent section can be provided at the front end of the working conduit 123: when the pre-bent section shrinks into the fixed tube 122, it can be straightened; when the pre-bent section extends from the front end of the fixed tube 122, it can be naturally bent. If the front end of the fixed tube 122 is bent, the front end of the working conduit 123 has a deformation section, which corresponds to the bending portion of the fixed tube 122. The deformation section can be bent and has a certain length. The style of the deformation section is not limited. For example, the deformation section is made of rubber material, or made of a bendable metal tube. When the working conduit 123 moves forward or backward, the deformation section can slide along the fixed tube 122 and bend at the bending portion of the fixed tube 122. When the working conduit 123 is located at the front and rear stop points, different parts of the deformation section are located near the bending portion of the fixed tube 122.
[0054] The forward and backward movement of the working conduit 123 is controlled by a pushing assembly 130 , which is disposed at the rear end of the working conduit 123 . The style of the pushing assembly 130 is not limited, as long as it can push the working conduit 123 to slide in the fixed tube 122 .
[0055] In this embodiment, the structure of the pushing component 130 can adopt but is not limited to the following solutions: Figure 6 As shown, the pushing assembly 130 includes a gear 131 and a rack 132 .
[0056] Among them, the gear 131 is rotatably arranged on the shell, and the connection method between the two is not limited. For example, the gear 131 and the shell are connected by a pin connection, that is, the pin passes through the middle of the gear 131, and the two ends of the pin are supported by the shell, etc. The setting position of the gear 131 is not limited. For example, the gear 131 is located between the first side shell 127 and the second side shell 128, and the rotating shaft of the gear 131 can extend along the left and right directions of the shell. A part of the gear 131 is located in the shell, and the other part is exposed from the shell so that the operator can push and rotate. The material of the gear 131 is not limited. For example, metal material or open mold plastic material can be used. The gear 131 can be circular, semicircular, etc., and teeth are arranged on the circumference of the gear 131. The style of the teeth is not limited, such as triangular cylindrical teeth distributed at equal intervals.
[0057] The material of the rack 132 is not limited, for example, metal material or molded plastic material can be used, the rack 132 can be strip-shaped, rectangular, etc., and one side of the rack 132 is provided with teeth, the style of the teeth is not limited, and it needs to match the teeth of the gear 131. The rack 132 can be located in the housing, of course, the rack 132 can also be exposed from the housing, the rack 132 is arranged along the axial direction of the working conduit 123, and the rack 132 is connected to the rear end of the working conduit 123. The connection method between the two is not limited, for example, connection by adhesive, integral molding, welding, etc. Since the working conduit 123 can only slide along the axial direction, the rack 132 can only slide along the working conduit 123.
[0058] The gear 131 and the rack 132 mesh with each other, and the rotation of the gear 131 can be converted into the linear motion of the rack 132. When the gear 131 rotates, it can drive the rack 132 to move forward or backward, thereby making the working conduit 123 move forward or backward, that is, the working conduit 123 slides axially in the fixed tube 122, so that the length of the working conduit 123 exposed from the front end of the fixed tube 122 changes. Figure 7-10 shown.
[0059] In some other embodiments, the pushing component 130 may also adopt other structures, for example, the pushing member includes a sliding button, the sliding button is slidably connected to the housing, the sliding button can slide back and forth along the upper edge of the housing, and the sliding button is connected to the rear end of the working conduit 123. When the sliding button is pushed, the working conduit 123 can be controlled to move forward or backward.
[0060] In actual surgery, after the working catheter 123 is pushed into place by the pushing component 130, the working catheter 123 must be locked, otherwise the working catheter 123 may slide abnormally, posing a safety hazard. In this embodiment, the pushing component 130 or the working catheter 123 is locked by the stop component 140, that is, the stop component 140 can lock the pushing component 130, and can also lock the working catheter 123. No matter whether the stop component 140 locks the pushing component 130 or the working catheter 123, the position of the working catheter 123 can be fixed and it cannot slide axially. The protruding length of the working catheter 123 from the front end of the fixed catheter is fixed.
[0061] The installation position of the stop assembly 140 is not limited. In the present embodiment, the stop assembly 140 may be disposed between the first side shell 127 and the second side shell 128 .
[0062] The structure of the stop assembly 140 is not limited. For example, the stop assembly 140 may adopt a ratchet mechanism or a rebound button. In this embodiment, the following solutions may be adopted but are not limited to: Figure 6 As shown, the stop assembly 140 includes a button 141 and a stop member 142 that are connected to each other. The button 141 is movably connected to the housing. When the button is moved, the stop member 142 can be driven to approach or move away from the push assembly 130: when the stop member 142 approaches the push assembly 130, the stop member 142 can lock the push assembly 130, and the push assembly 130 cannot drive the working conduit 123 to slide; when the stop member 142 moves away from the push assembly 130, the push assembly 130 is unlocked and can drive the working conduit 123 to slide.
[0063] The movable connection mode between the button 141 and the housing is not limited, such as a rotation connection, a sliding connection, etc. In this embodiment, the button 141 is slidably arranged on the housing, for example, the middle housing 125 can be provided with a limit groove, the limit groove extends along the front-back direction, the button 141 is embedded in the limit groove, the button 141 can slide forward or backward a certain distance in the middle housing 125, and a part of the button 141 is exposed from the housing, which is convenient for the operator to push. The material, shape, etc. of the button 141 are not limited, such as metal material, open mold plastic parts, etc.
[0064] There is no limit to the connection method between the button 141 and the stop member 142, for example, welding, detachable connection, etc. In this embodiment, the button 141 and the stop member 142 are connected by threaded fasteners, the threaded fasteners can be screws, and the screws can be ordinary metric threads or imperial self-tapping metal screws, etc.
[0065] The style of the stop member 142 is not limited. In order to match the gear 131 of the pushing assembly 130, the stop member 142 can be made of a metal spring. One end of the metal spring is connected to the button 141. When the pushing member is pushed forward to a certain position, the other end of the metal spring can be inserted into the teeth of the gear 131, thereby limiting the rotation of the gear 131.
[0066] The method of using the plasma scalpel 10 provided in this embodiment is as follows: The plasma scalpel 10 can be used in conjunction with the endoscope 20. Insert the plasma scalpel 10 into the designated position. Fig.11 As shown; when it is necessary to perform surgery on some specific surgical positions, push the button 141 backward to disengage the metal spring from the gear 131 and unlock the push assembly 130; use your fingers to drive the gear 131 to rotate, and the rotation of the gear 131 can drive the rack 132 to move forward or backward, thereby moving the working catheter 123 forward or backward, changing the extension length of the working catheter 123 from the front end of the fixed tube 122; push the case forward to make the metal spring approach and insert into the gear 131, and lock the push assembly 130; perform cutting, ablation or coagulation and hemostasis on the surgical site, please refer to Fig.12 shown.
[0067] The above steps can be increased, decreased, modified, or adjusted in order as needed. For example, if the structure of the driving component 130 changes, appropriate control steps can be adopted.
[0068] Working principle: the gear 131 and the rack 132 in the pushing component 130 are in a gear 131 transmission relationship. By manually rotating the gear 131, the effective power of the gear 131 is transmitted to the rack 132. The rack 132 and the middle shell 125 are in a slider linear motion relationship. At the same time, the rack 132 is connected to the working conduit 123, and the working conduit 123 is connected to multiple components such as the working pole head end 110. The fixed tube 122 is in a fixed and through-going relationship, so the driven working conduit 123 and the working pole head end 110 move linearly as a whole in the fixed tube 122.
[0069] Direction confirmation: When the gear 131 in the pushing component 130 rotates to the left, the effective power transmitted will drive the rack 132 to move linearly to the right in the coaxial direction. At this time, the working length of the electrode 11 is extended to the left end and is in an adjustable state; when the gear 131 in the pushing component 130 rotates to the right, the effective power transmitted will drive the rack 132 to move linearly to the left in the coaxial direction. At this time, the working length of the electrode 11 is retracted to the left end until it returns to the original basic length.
[0070] Stopping method: When the working length of the electrode 11 reaches the required position distance, the stop assembly 140 can be used to stop the electrode 11 to prevent the working length of the electrode 11 from moving further. Push the push button to the right until the stopper on the push button is stuck with the gear 131 surface of the gear 131. At this time, the gear 131 cannot be rotated, and the working length of the electrode 11 will be locked. If the push button is pushed to the left at this time, the stopper on the push button will move away from the gear 131 surface of the gear 131, and the fixed position of the working length of the electrode 11 will be unlocked. At this time, the gear 131 is in a state where it can rotate.
[0071] 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 medical handle, characterized in that: It includes a main body and a pushing component and a stopping component arranged on the main body; the main body includes a shell and a fixed tube and a working conduit connected to the shell, and the working conduit is slidably inserted into the fixed tube; the pushing component is transmission-connected to the rear end of the working conduit and is used to drive the working conduit to slide; the stopping component can lock the pushing component or the working conduit.
2. The medical handle according to claim 1, characterized in that: The pushing assembly comprises a gear and a rack meshing with each other, the gear is rotatably arranged on the housing, and the rack is connected to the rear end of the working conduit in the same direction.
3. The medical handle according to claim 2, characterized in that: The stop assembly comprises a metal spring, one end of which can be inserted into or disengaged from the gear.
4. The medical handle according to claim 1, characterized in that: The stop assembly includes a button and a stop member that are connected to each other. The button is movably arranged on the shell to drive the stop member to approach or move away from the pushing assembly.
5. The medical handle according to claim 4, characterized in that: The button is slidably disposed on the housing and exposed from the housing.
6. The medical handle according to claim 1, characterized in that: The front end of the fixed tube is a straight tube.
7. The medical handle according to claim 1, characterized in that: The front end of the fixing tube is provided with a bending portion, and the front end of the working conduit has a bending deformation section, and the deformation section corresponds to the bending portion.
8. The medical handle according to claim 1, characterized in that: The shell comprises a rear shell, a middle shell and a front shell which are connected in sequence, and the middle shell is relatively spliced by a separable first side shell and a second side shell.
9. The medical handle according to claim 8, characterized in that: The pushing assembly and the stopping assembly are disposed between the first side shell and the second side shell.
10. A plasma surgical knife, characterized in that: It comprises an electrode and the medical handle according to any one of claims 1 to 9, wherein the electrode is inserted into the medical handle and exposed from the front end of the working catheter.