A kind of knife head auxiliary device of low temperature plasma knife

Abstract

The present invention discloses a blade auxiliary device for a low-temperature plasma knife, belonging to the technical field of surgical medical instruments. The auxiliary device comprises a plasma knife head, and a negative pressure suction auxiliary device is arranged outside the plasma knife head. The negative pressure suction auxiliary device comprises an inner sleeve and an outer sleeve, wherein the inner sleeve is arranged outside the plasma knife head and a liquid storage cavity is provided between the two; the outer sleeve is located outside the inner sleeve, and a negative pressure reflux gap is formed between the outer sleeve and the inner sleeve, wherein the negative pressure reflux gap has an open end close to the end of the plasma knife head, and the open end is connected to the liquid storage cavity. The present invention realizes the integration of the three functions of water discharge, local water storage and negative pressure water absorption of the plasma surgical knife through the negative pressure suction auxiliary device, which can reduce the risk of suffocation of patients, reduce the configuration of additional surgical medical staff, and improve the efficiency of surgery.

Description

Technical Field

[0001] The invention relates to the technical field of surgical medical instruments, and in particular to a knife head auxiliary device for a low-temperature plasma knife. Background Art

[0002] Polyp ablation surgery using a plasma scalpel is an important operation in the otolaryngology department. Since the human ear, nose and throat are mostly composed of soft tissues and sensory cells, high temperatures will destroy the functions of adjacent cell tissues, and the operation needs to be controlled at a low temperature, that is, the protection of the medium liquid is required during the operation. At the same time, since this type of operation is mostly tissue surgery, it is usually performed in the patient's mouth. If the medium liquid cannot be negatively pressured out of the patient's mouth in time, the patient will be at risk of suffocation.

[0003] Currently, the coolable blade head and negative pressure suction tube assembly are of split design. The outflowing cold medium liquid is much larger than the amount absorbed by the esophagus, which causes liquid to remain in the patient's mouth. During the operation of the chief surgeon, the surgical nurse is required to manually handle the excess liquid with an additional negative pressure suction head in time to control the volume of the flowing liquid, which seriously affects the continuity of the operation and the timeliness of the attending physician's operation. At the same time, it also blocks the surgeon's line of sight, resulting in reduced surgical efficiency.

[0004] In order to solve the problems existing in the prior art, the United States invention patent with publication number US20140276469A1 discloses a fluid discharge device, which includes a nozzle, a hose mounting seat and a discharge hose. The nozzle has a receiving portion, which can be connected to a handheld instrument. The distal end of the nozzle has an opening, and the fluid can be drawn into the nozzle through the opening; the nozzle also has a flow area, and the fluid can pass through the flow area. The hose mounting seat connects the hose to the nozzle. The hose mounting seat includes a passage, and the fluid can pass through the passage from the flow area to the discharge hose. The invention can be attached to a handheld instrument to provide the handheld instrument with a fluid discharge capability, which solves the problem of the prior art blocking the operator's line of sight and improves the doctor's operating accuracy during the operation.

[0005] However, in the prior art, for surgeries that require the output of liquid media, while the liquid media is being output, excess liquid cannot be stably discharged at the same time, which poses a risk of suffocation to the patient. Summary of the invention

[0006] The object of the present invention is to provide a low-temperature plasma knife head auxiliary device which has operational safety and convenience and can improve surgical efficiency.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] A blade auxiliary device for a low-temperature plasma knife, comprising: a plasma blade, a negative pressure suction auxiliary device is provided on the outside of the plasma blade, and is characterized in that: the negative pressure suction auxiliary device comprises an inner sleeve and an outer sleeve, the inner sleeve is provided on the outside of the plasma blade and a liquid storage cavity is provided between the two; the outer sleeve is located at the periphery of the inner sleeve, a negative pressure reflux gap is formed between the outer sleeve and the inner sleeve, the negative pressure reflux gap has an open end close to the end of the plasma blade, and the open end is connected to the liquid storage cavity. The provision of the liquid storage cavity provides a temporary accommodation space for the medium liquid, which helps to improve the ability to neutralize the high temperature generated by the plasma blade, and can effectively avoid the possibility of damage to the muscles of the patient's surgical site due to excessive temperature, and the liquid storage cavity can ensure that the medium liquid is output in a timely and stable manner and achieve cooling, thereby improving the stability of cooling during surgery;

[0009] Preferably, the outer kit is connected to a negative pressure suction hose, the front end of the negative pressure suction hose is connected to the negative pressure reflux gap, and the rear end of the negative pressure suction hose is connected to a negative pressure suction motor.

[0010] Preferably, the inner sleeve has an inner sleeve head and an inner sleeve tail, a liquid storage cavity is formed between the inner sleeve head and the plasma cutter head, and the inner sleeve tail is tightly matched with the plasma cutter head.

[0011] Preferably, the plasma cutter head has a surgical knife water outlet hole connecting the interior thereof and the liquid storage cavity. The inner sleeve head of the inner sleeve is outside the plasma cutter head, and the liquid storage cavity is outside the water outlet hole. When the medium liquid flows out of the surgical knife water outlet hole, the inner sleeve head forms a diffusion restriction on the output medium liquid. On the one hand, the medium liquid can be relatively concentrated on the cutter head working area to improve the cooling effect. On the other hand, the inner sleeve head is used to reduce the flow rate of the medium liquid when it is output, so that the speed of the medium liquid acting on the muscle is relatively gentle, reducing the possibility of liquid impact causing damage to the patient's muscle.

[0012] Preferably, the outer sleeve is entirely surrounded by the inner sleeve and forms a negative pressure reflux gap. The outer sleeve has a mounting portion at the rear, the mounting portion is tightly fitted on the outside of the plasma cutter head, and the front end of the negative pressure suction hose is tightly inserted between the mounting portion and the plasma cutter head. The outer sleeve forms a negative pressure reflux gap around the inner sleeve, that is, the negative pressure reflux gap is an annular interlayer between the inner sleeve and the outer sleeve, which is conducive to relatively balanced suction of excess medium liquid from multiple positions, thereby improving the efficiency and stability of medium liquid suction.

[0013] Preferably, there is a gap between the front end of the negative pressure suction hose and the inner sleeve, and the gap is used to increase the local suction cross-sectional area. The local gap formed between the negative pressure suction hose and the inner sleeve increases the flow path cross-sectional area for the medium liquid flowing to the negative pressure suction hose in the negative pressure reflux gap, forms a buffer area for the discharged medium liquid, effectively reduces the possibility of liquid blockage when the medium liquid is discharged, and improves the stability of the discharged liquid.

[0014] Preferably, the rear of the plasma cutter head is connected to a knife bar assembly, which is a hollow tube and has an electrode base at the front end. The rear end of the knife bar assembly is connected to a water inlet hose, a power cord and a water outlet hose. The water inlet hose is used to transport the dielectric liquid to the plasma cutter head, the power cord is used to connect the plasma power supply and the electrode base, and the outer end of the water outlet hose is connected to a negative pressure suction motor. The water inlet hose transports the dielectric liquid into the plasma cutter head, and it flows outwardly to the liquid storage chamber through the water outlet hole of the scalpel. The liquid storage chamber temporarily stores the outflowing dielectric liquid. This part of the temporarily stored dielectric liquid can neutralize the high temperature generated by the electrode base, thereby improving the cooling effect, helping to ensure that the temperature of the electrode base is moderate during surgery, avoiding damage to human tissue due to excessive temperature, and improving the reliability, safety and stability of plasma surgery in otolaryngology.

[0015] Furthermore, due to the negative pressure attraction provided by the negative pressure suction motor to the negative pressure suction hose, excess medium liquid can enter the negative pressure reflux gap and be discharged outward through the negative pressure suction hose. That is, without affecting the surgical operation, the synchronous real-time operation of water discharge, local water storage and negative pressure water absorption can be realized. On the one hand, the possibility of excessive medium liquid output by the scalpel causing suffocation of the patient is avoided, which greatly improves the safety of the operation. On the other hand, the operation of the blade and the removal of excess liquid can be completed by a single person, which reduces the configuration of additional surgical medical staff, saves labor costs, and improves surgical efficiency. At the same time, additional suction equipment is no longer required to perform suction operations in the lesion area, which increases the operating scope of the surgeon, reduces the possibility of scratching or squeezing the patient's muscles by the equipment, and improves the safety and accuracy of the operation.

[0016] Preferably, the knife bar assembly is provided with a fixing piece for fixing the negative pressure suction hose, and the negative pressure suction hose is tangent to the outer wall of the knife bar assembly. The fixing piece is used to make the negative pressure suction hose stably fit the periphery of the knife bar assembly, reduce the space occupied by the negative pressure suction hose in the patient's body during surgery, and prevent the negative pressure suction hose from shaking or twisting during the suction process, causing damage to the patient's muscles or making it difficult to safely remove the scalpel.

[0017] Preferably, the head end face of the outer sleeve is arranged beyond the head end face of the inner sleeve. The height difference between the head end faces of the outer sleeve and the inner sleeve is conducive to the medium liquid flowing out of the liquid storage cavity being guided to the negative pressure reflux gap by the wall body of the outer sleeve that exceeds the inner sleeve, thereby reducing the possibility of suffocation caused by the overflow and diffusion of the medium liquid in the liquid storage cavity.

[0018] Preferably, the inner sleeve head and the outer sleeve head are both conical sleeve bodies, the large ends of the two conical sleeve bodies are arranged toward the end of the plasma cutter head, and a negative pressure reflux gap is formed between the two conical sleeve bodies. The conical walls of the inner sleeve head and the outer sleeve head can guide the medium liquid well.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the present invention realizes the integration of the three functions of water discharge, local water storage and negative pressure water absorption of the plasma scalpel through the negative pressure suction auxiliary device of the double-layer kit; the head design of the negative pressure suction auxiliary structure can realize the synchronous real-time operation of water discharge and water absorption without affecting the surgical operation; and the local suction area is large, which can timely discharge the excess liquid in the patient's oral surgical area and reduce the risk of suffocation of the patient; in addition, the operation of the blade and the removal of excess liquid can be completed by a single person, which not only reduces the configuration of additional surgical medical staff, saves labor costs, and improves surgical efficiency, but also reduces the setting of additional suction devices in the patient's body, increases the execution space of the surgeon, and improves the surgical accuracy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the cutter head auxiliary device of the present invention;

[0022] Figure 2 It is a partial cross-sectional schematic diagram of the tool head auxiliary device of the present invention;

[0023] Figure 3 It is a three-dimensional schematic diagram of the cutter head auxiliary device;

[0024] Figure 4 It is a partial cross-sectional schematic diagram of a tool head auxiliary device in Embodiment 2 of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the inner set in the second embodiment of the present invention;

[0026] Figure 6 It is a three-dimensional schematic diagram of a tool head auxiliary device in Embodiment 3 of the present invention;

[0027] Figure 7 It is a three-dimensional schematic diagram of a tool head auxiliary device in a fourth embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the inner kit in the fourth embodiment of the present invention.

[0029] Figure numbers: knife bar assembly 1; fixing part 2; knife handle 3; water inlet hose 4; power cord 5; water outlet hose 6; negative pressure suction auxiliary device 7; plasma knife head 8; connecting part 801; knife head part 802; inner kit 9; inner sleeve head part 901; inner sleeve tail part 902; inner bottom plate 903; outflow hole 904; outer kit 10; mounting part 101; outer sleeve head part 102; outer sleeve middle part 103; scalpel water outlet hole 11; negative pressure suction hose 12; negative pressure suction connector 14; fin 15. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0031] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0032] Embodiment 1:

[0033] See attached Figure 1 - Attachment Figure 3 A blade auxiliary device for a low-temperature plasma knife comprises: a plasma blade 8, a negative pressure suction auxiliary device 7 is arranged outside the plasma blade 8, and its characteristics are: the negative pressure suction auxiliary device 7 comprises an inner sleeve 9 and an outer sleeve 10, the inner sleeve 9 is arranged outside the plasma blade 8 and a liquid storage cavity is provided between the two; the outer sleeve 10 is located outside the inner sleeve 9, and a negative pressure reflux gap is formed between the outer sleeve 10 and the inner sleeve 9, and the negative pressure reflux gap has an open end close to the end of the plasma blade 8, and the open end is connected to the liquid storage cavity.

[0034] The medium output by the plasma cutter head can reach the liquid storage chamber, enter the negative pressure reflux gap through the opening part, and be drained and output.

[0035] The setting of the liquid storage chamber provides temporary accommodation space for the medium liquid, which helps to improve the ability to neutralize the high temperature generated by the plasma cutter head 8, and can effectively avoid the possibility of the patient's muscles at the surgical site being damaged due to excessive temperature. The setting of the liquid storage chamber can ensure that the medium liquid output later does not directly contact the patient's muscles, but first merges with the medium liquid in the liquid storage chamber. In the case of unstable power of the device outputting the liquid, the liquid flow rate and liquid flow rate acting on the patient's muscles can be stabilized, thereby improving the cooling stability during the operation.

[0036] The outer set 10 is connected to a negative pressure suction hose 12 , the front end of the negative pressure suction hose 12 is connected to the negative pressure reflux gap, and the rear end of the negative pressure suction hose 12 is connected to a negative pressure suction motor.

[0037] The inner sleeve 9 has an inner sleeve head 901 and an inner sleeve tail 902 . A liquid storage cavity is formed between the inner sleeve head 901 and the plasma cutter head 8 . The inner sleeve tail 902 is tightly matched with the plasma cutter head 8 .

[0038] The inner sleeve head 901 and the inner sleeve tail 902 have cylindrical channels on the inner and outer wall surfaces. The inner sleeve head 901 is sleeved on the outer periphery of the cutter head 802, and the inner sleeve tail 902 is installed on the outer side of the horizontal portion. The inner sleeve tail 902 is smoothly connected to the inner sleeve head 901 and is connected in the middle. The inner sleeve head 901 and the inner sleeve tail 902 have an inner chamfer at the connection, which is used to guide the cooling medium in the negative pressure reflux gap.

[0039] The straight section length of the inner sleeve head 901 is 7.9 mm, the thickness of the inner sleeve head 901 and the inner sleeve tail 902 are both 1 mm, the diameter of the cylindrical channel inside the inner sleeve head 901 is 15 mm, and the diameter of the cylindrical channel inside the inner sleeve tail 902 is 4.8 mm.

[0040] The plasma cutter head 8 has a surgical cutter water outlet 11 communicating with the interior of the plasma cutter head 8 and the liquid storage cavity.

[0041] The inner sleeve head 901 of the inner sleeve 9 is outside the plasma cutter head 8, and the liquid storage chamber is outside the water outlet. When the medium liquid flows out from the scalpel water outlet 11, the inner sleeve head 901 forms a diffusion restriction on the output medium liquid. On the one hand, the medium liquid can be relatively concentrated on the working area of ​​the cutter head to improve the cooling effect. On the other hand, the inner sleeve head 901 is used to reduce the flow rate of the medium liquid during output, so that the medium liquid acts on the muscle at a slower speed, reducing the possibility of liquid impact causing damage to the patient's muscles.

[0042] The outer sleeve 10 as a whole surrounds the inner sleeve 9 and forms a negative pressure reflux gap. The outer sleeve 10 has a mounting portion 101 at the rear end. The mounting portion 101 fits tightly on the outside of the plasma cutter head 8. The front end of the negative pressure suction hose 12 is tightly inserted between the mounting portion 101 and the plasma cutter head 8.

[0043] The outer sleeve 10 forms a negative pressure reflux gap on the periphery of the inner sleeve 9, that is, the negative pressure reflux gap is an annular interlayer between the inner sleeve 9 and the outer sleeve 10, which is conducive to more evenly sucking out excess medium liquid from multiple positions, thereby improving the efficiency and stability of medium liquid suction.

[0044] There is a gap between the front end of the negative pressure suction hose 12 and the inner sleeve 9, and the gap is used to increase the local suction cross-sectional area. The length of the gap in the derivative direction is 1-2 cm.

[0045] The tail of the outer sleeve 10 has a mounting step surface, and the front end surface of the negative pressure suction hose 12 is flush with the mounting step surface. A gap is formed between the mounting step surface and the tail end of the inner sleeve 9, and the medium liquid in the negative pressure reflux gap can enter the negative pressure suction hose 12 through the gap.

[0046] The local gap formed between the negative pressure suction hose 12 and the inner sleeve 9 increases the flow path cross-sectional area for the medium liquid flowing toward the negative pressure suction hose 12 in the negative pressure reflux gap, forms a buffer area for the discharged medium liquid, effectively reduces the possibility of liquid blockage when the medium liquid is discharged, and improves the stability of the discharged liquid.

[0047] In order to facilitate the adjustment of the incision extension depth and the sealing effect during surgery, a medical adhesive strip is used to fix the tail of the outer sleeve 10 at the far end of the plasma knife head 8.

[0048] The rear of the plasma cutter head 8 is connected to a cutter rod assembly 1, which is a hollow tube and has an electrode base at the front end. The rear end of the cutter rod assembly 1 is connected to a water inlet hose 4, a power cord 5 and a water outlet hose 6. The water inlet hose 4 is used to transport the medium liquid to the plasma cutter head 8, the power cord 5 is used to connect the plasma power supply and the electrode base, and the outer end of the water outlet hose 6 is connected to a negative pressure suction motor.

[0049] It should be noted that the knife rod assembly 1 is made of stainless steel, the electrode base is extended at the front end of the knife rod assembly 1, the knife rod assembly 1 is also connected to the handle 3, the handle 3 is installed on the periphery of the knife rod assembly 1, the water inlet hose 4, the power cord 5, and the water outlet hose 6 pass through the knife rod assembly 1 and the handle 3, and the handle 3 is an insulating material.

[0050] The water inlet hose 4 is connected to a medium liquid water bag.

[0051] In actual use, the medium liquid water bag, the water inlet hose 4 and the plasma cutter head 8 form the main path for liquid output;

[0052] The liquid storage cavity, the negative pressure reflux gap, and the negative pressure reflux hose form an auxiliary path for liquid discharge. The medium liquid is output from the main path and discharged from the auxiliary path.

[0053] The water inlet hose 4 transports the dielectric liquid into the plasma cutter head 8, and flows out to the liquid storage chamber through the scalpel water outlet hole 11. The liquid storage chamber temporarily stores the outflowing dielectric liquid. The temporarily stored dielectric liquid can neutralize the high temperature generated by the electrode base, thereby improving the cooling effect, helping to ensure that the temperature of the electrode base is moderate during surgery, avoiding damage to human tissue due to excessive temperature, and improving the reliability, safety and stability of plasma surgery in otolaryngology.

[0054] Furthermore, due to the negative pressure attraction provided by the negative pressure suction motor to the negative pressure suction hose 12, excess medium liquid can enter the negative pressure reflux gap and be discharged outward through the negative pressure suction hose 12. That is, without affecting the surgical operation, the synchronous real-time operation of water discharge, local water storage and negative pressure water absorption can be achieved. On the one hand, the possibility of excessive medium liquid output by the scalpel causing suffocation of the patient is avoided, which greatly improves the safety of the operation. On the other hand, the operation of the blade and the removal of excess liquid can be completed by a single person, reducing the configuration of additional surgical medical staff, saving labor costs, and improving surgical efficiency. At the same time, additional suction equipment is no longer required to perform suction operations in the lesion area, which increases the operating scope of the surgeon, reduces the possibility of scratching or squeezing the patient's muscles by the equipment, and improves the safety and accuracy of the operation.

[0055] The outer ends of the negative pressure suction hose 12 and the water outlet hose 6 are connected to the negative pressure suction motor through the negative pressure suction connector 14. The negative pressure suction connector 14 can realize the quick connection and assembly of the negative pressure suction hose 12 and the water outlet hose 6 with the negative pressure suction motor. After the operation is completed, the used hose can be disassembled from the negative pressure connector and a new hose can be assembled for the next operation.

[0056] The knife bar assembly 1 is provided with a fixing part 2 for fixing the negative pressure suction hose 12, and the negative pressure suction hose 12 is tangent to the outer wall of the knife bar assembly 1. The fixing part 2 is used to make the negative pressure suction hose 12 stably fit the periphery of the knife bar assembly 1, reduce the space occupied by the negative pressure suction hose 12 in the patient's body during surgery, and prevent the negative pressure suction hose 12 from shaking or twisting during the suction process, causing damage to the patient's muscles or making it difficult to safely remove the scalpel.

[0057] The head end face of the outer sleeve 10 is arranged beyond the head end face of the inner sleeve 9. There is a height difference between the head end faces of the outer sleeve 10 and the inner sleeve 9, which is conducive to the medium liquid flowing out of the liquid storage cavity being guided to the negative pressure reflux gap by the wall body of the outer sleeve 10 that exceeds the inner sleeve 9, thereby reducing the possibility of suffocation caused by the overflow and diffusion of the medium liquid in the liquid storage cavity.

[0058] The plasma cutter head 8 has a connecting portion 801 and a cutter head portion 802, and there is an angle between the connecting portion 801 and the cutter head portion 802 and they are smoothly connected;

[0059] The outer sleeve 10 also has an outer sleeve head 102 and an outer sleeve middle part 103. The outer sleeve head 102 is located outside the inner sleeve head 901. The outer sleeve head 102 is smoothly connected to the mounting part 101 and the middle part is connected. The outer sleeve middle part 103 is located outside the inner sleeve tail 902. The outer sleeve head 102 and the outer sleeve middle part 103 have an outer chamfer at the connection. The outer chamfer is located outside the inner chamfer. The two cooperate to guide the medium liquid in the negative pressure reflux gap to avoid water blockage.

[0060] The inner sleeve head 901 and the outer sleeve head 102 are both conical sleeves, and the large ends of the two conical sleeves are arranged toward the outside of the end of the plasma cutter head 8, and a negative pressure reflux gap is formed between the two conical sleeves.

[0061] The conical walls of the inner sleeve head 901 and the outer sleeve head 101 can guide the medium liquid well.

[0062] The materials of the inner sleeve 9 and the outer sleeve 10 include but are not limited to plastics, and the specific types of plastics include but are not limited to: polyethylene, which has low water absorption and generally does not need to be dried, and has a melting temperature range of 170 degrees Celsius to 260 degrees Celsius;

[0063] Polypropylene, which is colorless, odorless, non-toxic, light in weight, highly transparent, and has a melting temperature range of 220 to 270 degrees Celsius;

[0064] Polycarbonate: Polycarbonate has excellent mechanical properties and high temperature resistance, creep resistance, wear resistance, heat resistance, and cold resistance. Its brittle temperature is below -100 degrees Celsius, its long-term working temperature is 120 degrees Celsius, and its melting temperature range is between 260 degrees Celsius and 340 degrees Celsius.

[0065] Thermoplastic elastomer, thermoplastic elastomer has the high elasticity, high strength and high resilience of rubber, and its melting temperature range is between 170 degrees Celsius and 230 degrees Celsius.

[0066] Embodiment 2:

[0067] See attached Figure 4 - Attachment Figure 5 On the basis of the first embodiment of the present invention, the inner side of the end of the inner sleeve head 901 has an inner bottom plate 903, the inner bottom plate 903 cooperates with the outer wall of the plasma cutter head 8, and a plurality of outflow holes 904 are evenly distributed on the inner bottom plate 903. The plasma cutter head 8, the inner sleeve head 901 and the inner bottom plate 903 form a liquid storage cavity.

[0068] After the medium liquid output by the plasma cutter head 8 flows out from the drainage hole of the scalpel, it can reach the space between the conical inner sleeve head 901 and the plasma cutter head 8, and the inner bottom plate 903 partially intercepts the medium liquid in the liquid storage chamber. On the one hand, the storage capacity of the liquid storage chamber for the medium liquid is increased, and the stored medium liquid can be used more timely and effectively to cool the muscles in the surgical area, avoiding muscle damage caused by untimely supply of the medium liquid. On the other hand, the medium liquid in the liquid storage chamber flows out through the outlet hole 904, which can effectively improve the possibility of suffocation caused by excessive leakage of the medium liquid in the patient's body.

[0069] As excess liquid medium is sucked into the negative pressure reflux gap under the action of negative pressure suction, the inner bottom plate 903 forms multiple small channels for the medium liquid to flow out of the liquid storage chamber through the outlet holes 904, which helps to increase the speed at which the medium liquid is sucked in the negative pressure reflux gap, further reducing the possibility of suffocation, and at the same time reducing the power of the negative pressure suction motor, thereby reducing energy consumption.

[0070] Embodiment three:

[0071] See attached Figure 6 On the basis of the second embodiment of the present invention, the outflow hole 904 is a narrow vertical slit, and a plurality of outflow holes 904 are arranged on the outer side of the plasma cutter head 8 in a uniformly divergent shape.

[0072] After the medium liquid outputted by the plasma cutter head 8 flows out from the surgical knife drainage hole, it can reach the space between the conical inner sleeve head 901 and the plasma cutter head 8, and is guided by the narrow vertical slit.

[0073] When the medium liquid passes through the multiple outflow holes 904, it can form a vortex and be output from the inner bottom plate 903. The vortex can flow outward along the inner wall surface of the inner sleeve head 901. Under the action of negative pressure suction, the medium liquid flowing along the inner wall surface of the inner sleeve head 901 can be guided to the outer wall surface of the inner sleeve head 901 more quickly, that is, enter the negative pressure reflux gap and be sucked, thereby increasing the speed at which excess liquid medium is sucked away and reducing the possibility of suffocation of the patient caused by the diffusion of the liquid medium.

[0074] Since the scalpel water outlet 11 is opened on the side of the plasma cutter head 8, the medium liquid is output in the form of a vortex, which reduces the instantaneous impact force of the liquid medium output on the scalpel and improves the overall stability of the plasma cutter head 8 in the patient's body during the operation, thereby effectively increasing the safety of the operation and the accuracy of the operation.

[0075] Embodiment 4:

[0076] See attached Figure 7 - Attachment Figure 8On the basis of the first embodiment of the present invention, the outer wall of the inner sleeve head 901 is surrounded by fins 15, the fins 15 are located in the negative pressure reflux gap, and the fins 15 are arranged in cooperation with the inner wall of the outer sleeve head 102. The extension direction of the fins 15 and the extension direction of the inner sleeve head 901 are at an angle.

[0077] Since the plasma cutter head 8 will generate high temperature during the operation, the surrounding fins 15 can achieve uniform support between the outer sleeve head 102 and the inner sleeve head 901, avoiding the closure of the negative pressure reflux gap caused by deformation of the outer sleeve 10 and the inner sleeve 9 due to high temperature, ensuring that the opening of the negative pressure reflux gap for the introduction of liquid medium is uniformly annular, thereby improving the stability of suction and discharge of excess liquid medium;

[0078] Since the medium fluid will flow and diffuse when it is output to the muscle area, the negative pressure reflux gap in the annular space helps to contact the muscle from multiple angles, and is more conducive to forming negative pressure conditions in the negative pressure reflux gap, thereby reducing the time consumed in adjusting the position of suction during surgery, improving surgical efficiency, and further improving the ability to prevent suffocation;

[0079] Since the fins 15 are arranged obliquely relative to the inner sleeve head 901, the fluid entering the negative pressure reflux gap can form a swirl under the guidance of the multiple fins 15, and the swirl flows along the inner wall of the outer sleeve 10, and can be received and drawn out more quickly and effectively by the tangentially arranged negative pressure suction hose 12, and can still achieve efficient suction when the power of the negative pressure suction motor is low;

[0080] The fins 15 form a position for the outer set 10 outside the inner set 9, which can increase the assembly speed and shorten the preoperative preparation time during assembly and installation.

[0081] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0082] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A tool head auxiliary device for a low-temperature plasma tool, comprising: A plasma cutter head (8), wherein a negative pressure suction auxiliary device (7) is provided on the outer side of the plasma cutter head (8). The negative pressure suction auxiliary device (7) comprises an inner sleeve (9) and an outer sleeve (10); the inner sleeve (9) is arranged outside the plasma cutter head (8) and a liquid storage cavity is provided between the inner sleeve (9); the outer sleeve (10) is located outside the inner sleeve (9), and a negative pressure reflux gap is formed between the outer sleeve (10) and the inner sleeve (9); the negative pressure reflux gap has an open end close to the end of the plasma cutter head (8), and the open end is communicated with the liquid storage cavity. The inner sleeve (9) comprises an inner sleeve head (901) and an inner sleeve tail (902), the liquid storage cavity is formed between the inner sleeve head (901) and the plasma cutter head (8), and the inner sleeve tail (902) is tightly matched with the plasma cutter head (8). An inner bottom plate (903) is provided on the inner side of the end of the inner sleeve head (901); the inner bottom plate (903) cooperates with the outer wall of the plasma cutter head (8); a plurality of outflow holes (904) are evenly distributed on the inner bottom plate (903); the plasma cutter head (8), the inner sleeve head (901) and the inner bottom plate (903) form the liquid storage cavity.

2. The blade auxiliary device of a low-temperature plasma knife according to claim 1, characterized in that: The outer sleeve (10) is connected to a negative pressure suction hose (12), the front end of the negative pressure suction hose (12) is connected to the closed end of the negative pressure reflux gap, and the rear end of the negative pressure suction hose (12) is connected to a negative pressure suction motor.

3. The blade auxiliary device of a low-temperature plasma knife according to claim 1, characterized in that: The plasma knife head (8) has a surgical knife water outlet hole (11) communicating with the interior of the plasma knife head and the liquid storage cavity.

4. The blade auxiliary device of a low-temperature plasma knife according to claim 2, characterized in that: The outer sleeve (10) as a whole surrounds the inner sleeve (9) and forms the negative pressure return gap. The outer sleeve (10) has a mounting portion (101) at the rear, the mounting portion (101) is tightly fitted on the outside of the plasma cutter head (8), and the front end of the negative pressure suction hose (12) is tightly inserted between the mounting portion (101) and the plasma cutter head (8).

5. The blade auxiliary device of a low-temperature plasma knife according to claim 2, characterized in that: There is a gap between the front end of the negative pressure suction hose (12) and the inner sleeve (9), and the gap is used to increase the local suction cross-sectional area.

6. The blade auxiliary device of a low-temperature plasma knife according to claim 2, characterized in that: The rear of the plasma cutter head (8) is connected to a cutter bar assembly (1), the cutter bar assembly (1) is a hollow tube and an electrode base is provided at the front end, the rear end of the cutter bar assembly (1) is connected to a water inlet hose (4), a power cord (5) and a water outlet hose (6), the water inlet hose (4) is used to transport medium liquid to the plasma cutter head (8), the power cord (5) is used to connect a plasma power supply and the electrode base, and the outer end of the water outlet hose (6) is connected to the negative pressure suction motor.

7. The blade auxiliary device of a low-temperature plasma knife according to claim 6 is characterized in that: The knife rod assembly (1) is provided with a fixing part (2) for fixing the negative pressure suction hose (12), and the negative pressure suction hose (12) is tangent to the outer wall of the knife rod assembly (1).

Images