A suction LEEP knife

Abstract

The present invention relates to the technical field of LEEP knives, and particularly relates to a suction LEEP knife, which includes a knife head, a knife handle and a suction pump. The knife head is provided with a first channel, and the knife handle is provided with a second channel. The first channel and the second channel form a suction channel, and the suction pump draws air through the suction port via the suction channel. The first channel includes a smoke channel, a cleaning channel and a confluence channel. The smoke channel is arranged at the middle position of the knife head, and the cleaning channel is arranged at both ends of the knife head. The smoke channel and the cleaning channel communicate with the confluence channel. After the knife head and the knife handle are connected, the confluence channel outputs the smoke and the substances received by the channel to the second channel. By providing a suction port on the knife head, the present invention can not only shorten the distance between the suction port and the cutting position of the cervical tissue, but also separately suck the smoke and blood through the reasonable distribution of the suction ports on the knife head, improving the suction effect. The internal suction channel is connected to the suction pump arranged outside the knife handle, and the doctor's holding and use will not affect the suction channel.

Description

Technical Field

[0001] The present invention relates to the technical field of LEEP knives, and particularly relates to a suction LEEP knife. Background Art

[0002] A LEEP knife is a metal coil that uses high-frequency current generated by the coil to cut cervical tissue to achieve the purpose of removing lesions. It adopts a series of annular tungsten wire electrodes, and a high-frequency electric wave of 3.8 MHZ is generated at the tip of the electrode. When it contacts the cervical tissue, high heat is generated instantly, and steam waves are formed by the water in the cells to complete various surgical purposes such as cutting and hemostasis. The principle of the LEEP knife is different from that of the traditional electric knife. The traditional electric knife uses the impedance of the electrode itself to generate high heat when current passes through to achieve the surgical purpose, and the output frequency is 0.3 - 1.0 MHZ. However, the heat energy converted by the radio frequency of the high-frequency electric wave knife is generated inside the tissue. The radio frequency generates a sine wave to cause the water in the cells to oscillate and generate heat for evaporation, and the cells rupture to separate the tissue. The radio frequency emitter itself does not generate heat. Therefore, it is currently an advanced professional technology specifically used for minimally invasive diagnosis and treatment of cervical diseases.

[0003] Cervical loop electrosurgical excision procedure refers to a doctor using the high-frequency energy generated by a high-frequency electric knife to quickly excise the diseased tissue in the cervical area. Generally, less tissue is excised and less bleeding occurs. It is mainly applicable to the treatment of chronic cervicitis, cervical condyloma acuminata, cervical intraepithelial neoplasia or cervical intraepithelial neoplasia combined with condyloma acuminata, and cervical carcinoma in situ.

[0004] This method conducts high-frequency alternating current through a circular metal wire, and uses the unique drying and dehydration effect and arc cutting effect of high-frequency current to quickly cut the tissue contacted by the electrode.

[0005] During the cervical loop excision surgery, the smoke generated by the high heat of the tungsten wire of the LEEP knife and the cervical tissue needs to be sucked out of the body through a suction structure to prevent the smoke from covering the cervical tissue and affecting the doctor's operation vision. For the convenience of smoking, the suction structure of the prior art is often set at the handle position of the knife. A smoking port is set at the end of the handle, and an interface communicating with the smoking port is set on the side wall of the handle. A suction pipe is connected at the interface for air extraction. However, in the actual operation process, when the doctor holds the handle to operate, it is very easy for the suction pipe to fall off at the interface, and the smoking port set at the end of the handle is relatively far from the actual cutting position of the cervical tissue of the knife head, resulting in poor smoking effect. And the existing knife head does not have the function of sucking blood. When the wound surface is contaminated by bleeding, it is impossible to accurately find the bleeding point. Summary of the Invention

[0006] The objective of the first aspect of the present invention is to solve the problems that the suction pipe at the handle position is extremely prone to falling off, the smoking effect is poor, and the blood-sucking function is lacking. A smoking knife is provided. By setting the smoking port at the knife head position, the distance between the smoking port and the high-temperature area of the cervical tissue can be shortened. At the same time, there is a channel with a blood-sucking function, and the integrated setting has no risk of falling off. The main concept is as follows:

[0007] A suction LEEP knife includes a knife head, a handle, and a suction pump. The knife head is provided with a first channel, and the handle is provided with a second channel. After the knife head and the handle are connected, the first channel and the second channel form a suction channel. The suction pump is connected to the end of the handle. The first channel penetrates through the top of the knife head to set a suction port, and the suction pump sucks air through the suction channel from the suction port. The first channel includes a smoke channel, a cleaning channel, and a confluence channel. The smoke channel is set in the middle position of the knife head, the cleaning channel is set at both ends of the knife head, and the smoke and the channel are connected to the confluence channel. The confluence channel outputs the substances received by the smoke and the channel to the second channel. Due to the high-temperature smoke generated by the electric wire cutting of the cervical tissue with high-frequency current, according to the principle of heat convection, the hot smoke will rise with the heated air and gather above the operation site. In this solution, the smoke channel is set in the middle position of the knife head, which can better absorb the smoke converging above the cervical tissue. Since bleeding will occur during the cutting of the cervical tissue, which will contaminate the wound surface and make it impossible to see the bleeding point, which will affect the doctor's accurate hemostasis. In this solution, cleaning channels are set at both ends of the knife head, so that when the blood flowing out from the bleeding point during cutting flows out along both sides of the wound surface, it can be absorbed by the cleaning channels on the side of the knife head, keeping the wound surface clean and facilitating the doctor to find the bleeding point and stop bleeding quickly on the clean wound surface. Therefore, in this solution, by setting the suction port on the knife head, not only can the distance between the suction port and the cutting position of the cervical tissue be shortened, but also the smoke and blood can be sucked respectively through the reasonable distribution of the suction ports on the knife head, improving the suction effect. And by setting the suction channels inside the knife head and the handle respectively, when the knife head and the handle are spliced and energized, the suction channels are formed inside both of them at the same time and are connected to the suction pump arranged outside the handle, and the doctor's holding and using will not affect the suction channel.

[0008] Preferably, a diffusion mechanism is provided at the suction port of the smoke passage. The diffusion mechanism includes a strip-shaped groove and a flow equalizing plate. The two ends of the strip-shaped groove extend towards the two ends of the cutter head. A plurality of air holes are evenly distributed on the flow equalizing plate. The flow equalizing plate is installed above the strip-shaped groove, and a flow gas path is formed between the flow equalizing plate and the sunken hole. By arranging a flow equalizing plate with air holes above the sunken strip-shaped groove, a flow gas path is formed between the bottom surface of the strip-shaped groove and the flow equalizing plate. When the suction pump works, the suction port connected to the smoke passage sucks smoke from the outside. Since the sum of the areas of the air holes is smaller than the area of the air suction port, the cooperation of the strip-shaped groove and the flow equalizing plate can diffusely distribute the air suction positions on the basis of ensuring the pressure, so that there are more air suction positions when the cutter head smokes, avoiding the problem that when the smoke is distributed on the side of the smoke passage, an absorption dead angle is formed, resulting in the inability to fully absorb the smoke and affecting the operation vision of the working position.

[0009] Preferably, an adsorption filter screen is provided in the smoke passage; and / or, an adsorption filter screen is also provided at the suction port of the smoke passage. The adsorption filter screen is arranged in the strip-shaped groove, and the adsorption filter screen is provided with smoke holes connected to the smoke passage. Arranging an adsorption filter screen in the smoke passage enables various harmful gases in the smoke generated during high-temperature cutting of the electric wire to be adsorbed by the adsorption filter screen. Placing the adsorption filter screen in the strip-shaped groove at the suction port facilitates the replacement of the adsorption filter screen.

[0010] The purpose of the second aspect of the present invention is to solve the technical problem of insufficient blood cleaning during cutting. Further, a side retaining ring is provided at the suction port of the cleaning passage. The side retaining ring is a frustum of a cone structure. The large-diameter end of the side retaining ring is connected to the suction port, and strip-shaped through holes are provided on the outer wall of the side retaining ring. In this solution, a side retaining ring is provided at the suction port of the cleaning passage. When absorbing blood, the blood can be sucked in from both the small diameter and the strip-shaped holes on the side wall. And by opening holes on the side wall, the side retaining ring can suck blood in multiple directions during the operation of the cutter head. And if a large piece of residue tissue blocks the small diameter, the blood can still be sucked in from the strip-shaped holes on the side wall, avoiding the technical problem that the cleaning passage is blocked by tissue at the suction port.

[0011] Preferably, a drainage mechanism is provided in the water absorption channel. The water absorption channel includes a vertically inlet channel, a horizontally inlet channel, and an arc-shaped confluence channel connected in sequence. The vertically inlet channel is perpendicular to the upper end of the cutter head. The drainage mechanism includes a spiral conveyor shaft disposed in the vertically inlet channel, and the outlet of the spiral conveyor shaft is connected to the horizontally inlet channel. The drainage mechanism further includes a rotating wheel disposed at the connection position between the horizontally inlet channel and the arc-shaped confluence channel, and the arc-shaped confluence channel is connected to the confluence channel. The spiral conveyor shaft and the rotating wheel are connected to a driving motor, and the rotating shaft of the rotating wheel is perpendicular to the surface of the cutter head. When this solution is used, after the blood enters the suction port, the blood is conveyed along the spiral blades of the spiral conveyor shaft, so that under a certain adsorption force, the blood enters the cleaning channel and is conveyed along the spiral blades without backflow, avoiding the problem that the blood entering the vertically inlet channel may flow back due to shaking and re-pollute the wound. At the connection between the horizontally inlet channel and the arc-shaped confluence channel, a rotating wheel with a rotating shaft perpendicular to the surface of the cutter head is provided, so that the tangential force generated by the rotation of the rotating wheel can further provide assistance for the blood conveyed inside, so that it is conveyed into the arc-shaped confluence channel.

[0012] In order to align the cutter head and the handle to form a suction channel. Preferably, the cutter head further includes a blade body, an electric cutting wire, an electrode plate, and a conductive rod. Mounting openings are provided at both ends of the cutter head. The electric cutting wire extends out of the middle of the cutter head through the mounting opening to form a cutting ring, and both ends of the electric cutting wire are located inside the cutter head and connected to the electrode plate. A conductive rod is installed at the center position of the blade body and is electrically connected. The electric cutting wire is electrically connected to the conductive rod through the electrode plate, and the conductive rod extends outside the blade body; the handle is provided with a conductive groove for accommodating the conductive rod, the conductive groove cooperates with the conductive rod, the bottom of the conductive groove is connected to a high-frequency current generator through a conducting wire, and a plurality of control buttons are provided outside the handle. The control buttons respectively control the current and the driving components in the channel. The second channel of the handle is distributed outside the conductive groove, and the second channel is not communicated with the conductive groove; a positioning component is provided between the conductive rod and the conductive groove. When the positioning component is in place, the first channel extending inside the blade body is aligned with the second channel of the handle.

[0013] Preferably, the first channel includes two confluence channels, and the two confluence channels are respectively used to connect the smoke channel and the cleaning channel. The two confluence channels are respectively connected to two second channels opened in the handle. The two second channels are respectively connected to a vacuum pump and a liquid pump. The two confluence channels are symmetrically arranged on one side close to the surface of the cutter head, and the distance between the confluence channels is less than the diameter of the electrode plate.

[0014] Preferably, the cutter head is provided with a first joint for connecting to the tool handle. The first joint is arranged at the end of the cutter body of the cutter head. The second joint is arranged at the top of the tool handle. The outer part of the first joint is provided with an external thread, and the inner part of the second joint is provided with an internal thread. The first joint and the second joint are connected by threads. When the thread fit is in place, the confluence channel and the second channel are aligned. A sealing ring for sealing is arranged at the butting position of the confluence channel and the second channel. In this solution, the cutter head and the tool handle are detachably connected by means of threaded connection. The bottom of the cutter body of the cutter head is provided with a first joint with an external thread, and the tool handle is provided with a second joint and an internal thread for connecting the first joint. In order to ensure the airtight performance at the thread, raw tape is wrapped around the outside of the first joint. After the first joint and the second joint are in place, the confluence channel and the second channel can be butted and aligned.

[0015] The purpose of the third aspect of the present invention is to solve the technical problem that the sealing member arranged eccentrically will be interfered by the rotation of the thread. Further, a sealing member for positioning the sealing ring is also arranged between the confluence channel and the second channel. The sealing member includes an annular groove for restricting the sealing ring and a pressing ring for pressing the sealing ring. The annular groove is arranged on the outer edge of the confluence channel, and the pressing ring is arranged on the outer edge of the second channel; the second joint includes a guide member and an annular slider slidably matched inside the guide member. The inner wall of the annular slider is provided with an internal thread for threaded fit with the first joint; a positioning retaining ring is arranged at the bottom of the annular slider. When the first joint is in place in cooperation with the positioning retaining ring, the confluence channel and the second channel are aligned. Since the size of the sealing ring arranged at the connection of the two channels is too small, it is necessary to position and place the sealing ring by arranging an annular groove, and a pressing ring coaxial with the annular groove and capable of being snapped into its interior is arranged. The pressing ring presses the sealing ring arranged in the annular groove. The annular groove provides a clear installation position for the sealing ring. Through the geometric shape and depth design of the annular groove, the displacement and torsional deformation of the sealing ring during the working process can be effectively avoided; in this solution, the internal thread that needs to be opened in the tool handle is arranged on the inner wall of the annular slider. The annular slider is slidably matched along the inside of the guide member, so that when the first joint is connected by threads, the annular slider can be adjusted to the upper end of the guide member, so that when the first joint is in threaded fit, there is a certain distance between the annular groove of the sealing member and the conductive rod and the pressing ring and the conductive groove of the second joint, which not only avoids the interference of the eccentrically arranged sealing member on the thread rotation, but also avoids the interference of the conductive rod and the conductive groove provided with the positioning assembly on the thread rotation.

[0016] Preferably, the guide and the annular slider further include a connecting member for positioning the annular slider. The connecting member includes a first connecting portion and a second connecting portion. The guide is axially provided with a strip-shaped hole. The first connecting portion is installed outside the guide, and the second connecting portion is installed on the outer wall of the annular slider. The second connecting portion passes through the strip-shaped hole and is connected to the first connecting portion of the guide; a support retaining ring is provided at the top of the guide, and the support retaining ring and the annular slider are connected by a tension spring. This solution By providing a tension spring, when the annular slider is not positioned and connected to the guide through the connecting member, the annular slider can automatically slide to the upper end of the second joint under the action of the restoring force of the tension spring, simplifying the operation steps; in order to move the annular slider along the lower end of the guide, after the seal and the conductive rod are aligned and connected by plugging, the position of the annular slider is tightly connected through the connecting member, so that the first joint internally threaded in the annular slider is tightly connected to the tool holder.

[0017] By providing a suction port on the tool tip, not only can the distance between the suction port and the cutting position of the cervical tissue be shortened, but also the smoke and blood can be respectively suctioned through the reasonable distribution of the suction ports on the tool tip, improving the suction effect. The suction channel provided inside is connected to the suction pump provided outside the tool holder, and the doctor's holding and use will not affect the suction channel. The smoke channel is provided with an adsorption filter screen, and various harmful gases in the smoke generated during the high-temperature cutting of the electric cutting wire can be adsorbed by the adsorption filter screen, reducing human body damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structure diagram of the tool tip of the present invention Figure 1 。

[0019] Figure 2 is an enlarged structure diagram of the smoke channel of the present invention.

[0020] Figure 3 is an enlarged structure diagram of the adsorption filter screen of the present invention.

[0021] Figure 4 is a schematic structure diagram of the tool tip of the present invention Figure 2 。

[0022] Figure 5 is an enlarged structure diagram of the cleaning channel of the present invention.

[0023] Figure 6 is the structural state of the cooperation between the tool tip and the tool holder of the present invention Figure 1 。

[0024] Figure 7 is the structural state of the cooperation between the tool tip and the tool holder of the present invention Figure 2 。

[0025] Figure 8This is the structural state diagram of the seal of the present invention.

[0026] The reference numerals include: 1, cutter head; 11, cutter body; 12, electric cutting wire; 13, electrode piece; 14, conductive rod; 2, handle; 21, conductive groove; 22, positioning ring groove; 3, first channel; 31, smoke channel; 311, adsorption filter; 312, smoke hole; 32, cleaning channel; 321, vertical inlet channel; 322, horizontal inlet channel; 323, arc-shaped confluence channel; 33, confluence channel; 4, second channel; 5, diffusion mechanism; 51, strip groove; 52, flow equalizing plate; 53, air hole; 54, flow gas path; 6, side retaining ring; 61, strip through hole; 7, drainage mechanism; 71, spiral conveyor shaft; 72, rotating wheel; 8, first joint; 9, second joint; 91, guide; 92, annular slider; 93, positioning retaining ring; 94, tension spring; 95, support retaining ring; 96, connecting piece; 97, seal; 971, annular groove; 972, pressing ring. Detailed implementation mode

[0027] In order to make the purpose, technical solution and advantages of the embodiments clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" are defined according to the self-profile of the corresponding components. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another, and do not have sequence and importance.

[0029] Embodiment 1

[0030] As Figures 1-8 shown, a suction LEEP knife of this embodiment includes a cutter head 1, a handle 2 and a suction pump. The cutter head 1 is provided with a first channel 3, and the handle 2 is provided with a second channel 4. After the cutter head 1 and the handle 2 are connected, the first channel 3 and the second channel 4 form a suction channel. The suction pump is connected to the end of the handle 2. The first channel 3 penetrates through the top of the cutter head 1 to set a suction port, and the suction pump sucks air through the suction channel from the suction port; the first channel 3 includes a smoke channel 31, a cleaning channel 32 and a confluence channel 33. The smoke channel 31 is arranged in the middle position of the cutter head 1, the cleaning channel 32 is arranged at both ends of the cutter head 1, the smoke and the channel are connected and communicated with the confluence channel 33, and the confluence channel 33 outputs the substances received by connecting the smoke and the channel to the second channel 4.

[0031] Due to the high-temperature smoke generated by the electrocautery wire 12 with high-frequency current cutting the cervical tissue, according to the principle of heat convection, the hot smoke will rise with the heated air and gather above the operation site. In this solution, the smoke channel 31 is set in the middle position of the cutter head 1, which can better absorb the smoke converging above the cervical tissue.

[0032] Since the heat generated by the cutter head 1 during cutting will cause thermal damage to the surrounding normal tissues and result in bleeding, it is necessary to absorb the blood before the bleeding point of the wound surface can be found for hemostasis. In this solution, cleaning channels 32 are set at both ends of the cutter head 1, so that when the blood flows out at the edge of the cut surface, it can be received by the cleaning channels 32 on the side of the cutter head 1, keeping the wound surface clean.

[0033] In this embodiment, by setting suction ports on the cutter head 1, not only can the distance between the suction ports and the cutting position of the cervical tissue be shortened, but also the smoke and blood can be respectively suctioned through the reasonable distribution of the suction ports on the cutter head 1 to improve the suction effect. Also, by setting the suction channels inside the cutter head 1 and the handle 2 respectively, when the cutter head 1 and the handle 2 are spliced and electrified, the suction channels are formed inside both of them and connected to the suction pump set outside the handle 2, which will not affect the suction channels when the doctor holds and uses it.

[0034] Embodiment 2

[0035] As Figures 2-3 shown, a diffusion mechanism 5 is set at the suction port of the smoke channel 31 in this embodiment. The diffusion mechanism 5 includes a strip-shaped groove 51 and a flow equalizing plate 52. Both ends of the strip-shaped groove 51 extend towards both ends of the cutter head 1. A plurality of air holes 53 are evenly distributed on the flow equalizing plate 52. The flow equalizing plate 52 is installed above the strip-shaped groove 51, and a flow gas path 54 is formed between the flow equalizing plate 52 and the counterbore.

[0036] As Figure 2 shown, a flow equalizing plate 52 with air holes 53 is set above the sunken strip-shaped groove 51, so that the gap between the bottom surface of the flow equalizing plate 52 and the strip-shaped groove 51 forms a flow gas path 54. When the suction pump works, the suction port connected to the smoke channel 31 sucks the smoke outwards. Since the sum of the areas of the air holes 53 is smaller than the area of the air extraction port, the cooperation of the strip-shaped groove 51 and the flow equalizing plate 52 can diffusely distribute the air suction position on the basis of ensuring the pressure, so that there are more air suction positions when the cutter head 1 sucks the smoke, avoiding the problem that when the smoke is distributed on the side of the smoke channel 31, an absorption dead angle is formed, resulting in the smoke not being fully absorbed and affecting the operation vision of the working position.

[0037] As Figure 3As shown in the figure, an adsorption filter screen 311 is arranged in the smoke channel 31 of this embodiment. The adsorption filter screen 311 adopts a composite activated carbon filter screen with a large surface area and strong adsorption force. In one embodiment, the adsorption filter screen 311 is arranged in a cylindrical shape, and the adsorption filter screen 311 is synchronously arranged according to the layout path of the smoke channel 31. When the smoke inhaled in the smoke channel 31 is transported along the smoke channel 31 inside the cutter head 1, it comes into contact with the adsorption filter screen 311 synchronously to achieve the adsorption effect.

[0038] As Figure 3 shown in the figure, in another embodiment, an adsorption filter screen 311 is arranged at the suction port of the smoke channel 31. The adsorption filter screen 311 is a rectangular frame structure with an opening. The adsorption filter screen 311 is arranged in the strip-shaped groove 51. The flow equalizing plate 52 and the strip-shaped groove 51 in this embodiment are detachably connected. The opening of the adsorption filter screen 311 faces the direction of the flow equalizing plate 52. When the smoke enters the diffusion mechanism 5 at the suction port and the smoke flows in the flow gas path 54 towards the smoke channel 31, the smoke comes into contact with the adsorption filter screen 311 arranged in the diffusion mechanism 5 at the same time. The adsorption filter screen 311 can fully adsorb the harmful gases in the smoke; the adsorption filter screen 311 is provided with a cylindrical smoke hole 312 connected to the smoke channel 31. In order to enable the smoke entering the middle part of the flow equalizing plate 52 to be absorbed as well, the smoke hole 312 is a cylindrical structure, and the cylindrical smoke hole 312 cooperates with the side wall of the inlet end of the smoke channel 31, so that the smoke entering through the flow equalizing plate 52 can be adsorbed in all directions. Arranging the adsorption filter screen 311 in the smoke channel 31 enables various harmful gases in the smoke generated during the high-temperature cutting of the electric cutting wire 12 to be adsorbed by the adsorption filter screen 311. The flow equalizing plate 52 and the strip-shaped groove 51 are detachably connected. Placing the adsorption filter screen 311 in the strip-shaped groove 51 at the suction port facilitates the replacement of the adsorption filter screen 311.

[0039] As Figures 4-5 shown in the figure, a side retaining ring 6 is arranged at the suction port of the cleaning channel 32 in this embodiment. The side retaining ring 6 is a conical platform structure. The large-diameter end of the side retaining ring 6 is connected to the suction port, and a strip-shaped through hole 61 is arranged on the outer wall of the side retaining ring 6. A side retaining ring 6 is arranged at the suction port of the cleaning channel 32. When absorbing blood, the blood can be inhaled not only from the small diameter but also from the strip-shaped through holes 61 on the side wall. And by opening the side wall, it also enables the side retaining ring 6 to perform blood suction in all directions during the operation of the cutter head 1. And if tissue blocks the small diameter and affects the air extraction at the small-diameter end, the blood can still be inhaled from the strip-shaped through holes 61 on the side wall, avoiding the technical problem that the cleaning channel 32 is blocked at the suction port by tissue.

[0040] Embodiment 3

[0041] As Figures 4-5As shown in the figure, on the basis of Embodiment 1, a drainage mechanism 7 is provided in the cleaning channel 32 of this embodiment. The cleaning channel 32 includes a vertical inflow channel 321, a horizontal inflow channel 322, and an arc-shaped confluence channel 323 that are connected in sequence. The vertical inflow channel 321 is vertically arranged with the upper end of the cutter head 1. The drainage mechanism 7 includes a spiral conveyor shaft 71. The spiral conveyor shaft 71 is arranged in the vertical inflow channel 321, and the outlet of the spiral conveyor shaft 71 is connected to the horizontal inflow channel 322. The drainage mechanism 7 further includes a rotating wheel 72. The rotating wheel 72 is arranged at the connection position between the horizontal inflow channel 322 and the arc-shaped confluence channel 323. The arc-shaped confluence channel 323 is connected to the confluence channel 33. The spiral conveyor shaft 71 and the rotating wheel 72 are connected to a driving motor, and the rotating shaft of the rotating wheel 72 is perpendicular to the surface of the cutter head 1.

[0042] The arrangements of the vertical inflow channel 321, the horizontal inflow channel 322, and the arc-shaped confluence channel 323 are set according to the outer contour of the cutter head 1.

[0043] When this embodiment is in use, after the blood enters the suction port, the blood is conveyed along the spiral blades of the spiral conveyor shaft 71, so that under a certain adsorption force, the blood enters the cleaning channel 32 and is conveyed along the spiral blades without backflow, avoiding the problem that the blood in the vertical inflow channel 321 may flow back due to shaking and re-pollute the wound. At the connection between the horizontal inflow channel 322 and the arc-shaped confluence channel 323, a rotating wheel 72 with a rotating shaft perpendicular to the surface of the cutter head 1 is provided, so that the tangential force generated by the rotation of the rotating wheel 72 can further provide assistance for the internally conveyed blood and make it conveyed into the arc-shaped confluence channel 323.

[0044] The rotating wheel 72 includes a rotating shaft and a blade group evenly distributed along the outer wall of the rotating shaft. In order to make the assistance conveying performance in the channel higher, the blade group is arranged along the axial direction of the rotating shaft. A flow velocity sensor is provided at the end of the first channel 3. The flow velocity sensor measures the blood flow velocity in the suction channel, and the rotation speeds of the driving motors driving the spiral conveyor shaft 71 and the rotating wheel 72 can be adjusted through a controller.

[0045] Embodiment 4

[0046] As Figures 1-8As shown, in order to enable the cutter head 1 and the handle 2 to be aligned to form a smoking channel, the cutter head 1 in this embodiment further includes a cutter body 11, an electric cutting wire 12, an electrode plate 13, and a conductive rod 14. Installation openings are provided at both ends of the cutter head 1. The electric cutting wire 12 extends out of the middle of the cutter head 1 through the installation opening to form a cutting ring. Both ends of the electric cutting wire 12 are located inside the cutter head 1 and are connected to the electrode plate 13. The conductive rod 14 is installed at the central position of the cutter body 11 and is electrically connected. The electric cutting wire 12 is electrically connected to the conductive rod 14 through the electrode plate 13, and the conductive rod 14 extends outside the cutter body 11; the handle 2 is provided with a conductive groove 21 for accommodating the conductive rod 14. The conductive groove 21 cooperates with the conductive rod 14. The bottom of the conductive groove 21 is connected to a high-frequency current generator through a conducting wire. A plurality of control buttons are provided on the outside of the handle 2, and the control buttons respectively control the current and the driving components in the channel. The second channel 4 of the handle 2 is distributed outside the conductive groove 21, and the second channel 4 is not interconnected with the conductive groove 21; a positioning component is provided between the conductive rod 14 and the conductive groove 21. When the positioning component is in place, the first channel 3 extending in the cutter body 11 is aligned with the second channel 4 of the handle 2.

[0047] The handle 2 is connected to the high-frequency electrosurgical generator through a connecting wire. The high-frequency electrosurgical generator provides a 3.8 MHz high-frequency current, which is transmitted to the LEEP knife through the connecting wire to generate high temperature for cutting and coagulation. The connecting wire is connected to the middle position at the bottom of the handle 2. Two second channels 4 distributed on both sides of the handle 2 are connected to a suction pump through a hose at their ends; when a doctor holds the handle 2 during the operation, they will not come into contact with the hose connected to the suction pump, causing the suction hose to fall off; in addition, the switch for controlling the current generation of the high-frequency electrosurgical generator can also be set as a foot switch, and the doctor controls the output of the current through the foot switch, which is convenient for flexible adjustment of the operation mode during the operation.

[0048] An insulating layer is sleeved outside the cutter head 1 to prevent the current from spreading to normal tissues; the handle 2 is made of insulating material to ensure the safety of the doctor's operation. A ring-shaped or sheet-shaped metal conductive sheet is provided at the bottom of the conductive groove 21 inside the handle 2. When the conductive rod 14 is inserted into the handle 2, its end is in direct contact with the metal conductive sheet. The metal conductive sheet is connected to an external high-frequency power supply through a wire. The current is conducted to the conductive rod 14 through the metal conductive sheet in the conductive groove 21 and finally acts on the electric cutting wire 12 of the cutter head 1.

[0049] The outside of the conductive rod 14 is wrapped with an insulating layer, and the conductive material is only exposed in a specific area in contact with the metal conductive sheet to ensure the directional transmission of the current and prevent leakage.

[0050] The first channel 3 of this embodiment includes two converging channels 33, and the two converging channels 33 are respectively used to connect the smoke channel 31 and the cleaning channel 32. The two converging channels 33 are respectively connected to two second channels 4 opened in the handle 2, and the two second channels 4 are respectively connected to the vacuum pump and the liquid pump. The two converging channels 33 are symmetrically arranged on one side close to the surface of the cutter head 1, and the distance between the converging channels 33 is smaller than the diameter of the electrode sheet 13.

[0051] In this embodiment, the positions of the converging channels 33 distributed along the axial direction and the positions where the two ends of the electric cutting wire 12 are connected to the electrode sheet 13 are staggered. In this embodiment, the distribution of the electric cutting wire 12 in the cutter head 1 is staggered with the first channel 3. The electric cutting wire 12 in this embodiment includes a cutting ring and a conductive connecting wire. The cutting ring is the part extending outside the cutter head 1, and the conductive connecting wire is the part connected to the electrode sheet 13 inside the cutter head 1. The distribution of the conductive connecting wire avoids the internal first channel 3.

[0052] The positioning assembly provided between the conductive rod 14 and the conductive slot 21 is used as a reference for aligning the first channel 3 and the second channel 4. The positioning assembly of this embodiment adopts a straight-line structure, and a straight-line convex strip can be symmetrically provided along the axis of the outer side of the conductive rod 14, and a straight-line groove can be symmetrically provided along the axis of the inner wall of the conductive slot 21. When aligning and inserting, the alignment progress can be ensured, and in order to improve the accuracy, the positioning assembly can also adopt convex strips and grooves of various shapes.

[0053] Example 5

[0054] like Figures 6-8 As shown, the cutter head 1 of this embodiment is provided with a first joint 8 for connecting to the cutter handle 2, the first joint 8 is provided at the end of the blade body 11 of the cutter head 1, the second joint 9 is provided at the top of the cutter handle 2, the outside of the first joint 8 is provided with an external thread, the inside of the second joint 9 is provided with an internal thread, the first joint 8 and the second joint 9 are threadedly connected, when the threads are in place, the converging channel 33 and the second channel 4 are aligned, and a sealing ring for sealing is provided at the abutment position of the converging channel 33 and the second channel 4.

[0055] In this embodiment, the cutter head 1 and the handle 2 are detachably connected by a threaded connection. A first joint 8 with an external thread is provided at the bottom of the blade body 11 of the cutter head 1, and a second joint 9 is provided at the handle 2 and has an internal thread for connecting to the first joint 8. In order to ensure the sealing performance at the threaded part, a raw tape is wrapped on the outside of the first joint 8. After the first joint 8 and the second joint 9 are in place, the converging channel 33 and the second channel 4 can be abutted and aligned.

[0056] In this embodiment, an external thread is provided outside the first joint 8 at the end of the blade body 11, which does not change the basic appearance of the blade body. When docking with the common handle 2 in the prior art, it can be smoothly inserted for power supply, making the cutter head 1 of this embodiment universal.

[0057] A seal 97 for positioning the sealing ring is also provided between the confluence channel 33 and the second channel 4 in this embodiment. The seal 97 includes an annular groove 971 for restraining the sealing ring and a pressing ring 972 for pressing the sealing ring. The annular groove 971 is provided on the outer edge of the confluence channel 33, and the pressing ring 972 is provided on the outer edge of the second channel 4. Since the size of the sealing ring provided at the connection of the two channels is too small, it is necessary to position and place the sealing ring by setting the annular groove 971, and a pressing ring 972 coaxial with the annular groove 971 and capable of being snapped into its interior is provided. The pressing ring 972 presses the sealing ring provided in the annular groove 971. The annular groove 971 provides a clear installation position for the sealing ring. Through the geometric shape and depth design of the annular groove 971, the displacement of the sealing ring during operation can be effectively restricted, reducing the risk of deformation and displacement caused by pressure.

[0058] Embodiment 6

[0059] As Figures 6-8 shown, the second joint 9 of this embodiment includes a guide member 91 and an annular slider 92 slidably fitted inside the guide member 91. An internal thread for threaded cooperation with the first joint 8 is provided on the inner wall of the annular slider 92;

[0060] A positioning retaining ring 93 is provided at the bottom of the annular slider 92. When the first joint 8 is in place in cooperation with the positioning retaining ring 93, the confluence channel 33 and the second channel 4 are aligned;

[0061] A support retaining ring 95 is provided at the top of the guide member 91. The support retaining ring 95 and the annular slider 92 are connected by a tension spring 94;

[0062] The guide member 91 and the annular slider 92 further include a connecting member 96 for positioning the annular slider 92. The connecting member 96 includes a first connecting portion and a second connecting portion. The guide member 91 is axially provided with a strip-shaped hole. The first connecting portion is installed outside the guide member 91, and the second connecting portion is installed on the outer wall of the annular slider 92. The second connecting portion passes through the strip-shaped hole and is connected to the first connecting portion of the guide member 91. The setting of the position of the connecting member 96 enables the connecting member 96 for tight fixing and positioning not to directly act on the cutter head 1.

[0063] In this embodiment, the internal thread to be provided in the tool shank 2 is arranged on the inner wall of the annular slider 92. The annular slider 92 is slidably fitted inside the guide member 91. When threadedly connecting with the first joint 8, the annular slider 92 can be adjusted to the upper end of the guide member 91, so that when the first joint 8 is in threaded fit, a certain distance can be reserved between the annular groove 971 of the seal 97 and the conductive rod 14 and the pressing ring 972 and the conductive groove 21 of the second joint 9. This not only avoids the interference of the eccentrically arranged seal 97 with the thread rotation, but also avoids the interference of the conductive rod 14 and the conductive groove 21 provided with the positioning component with the thread rotation.

[0064] By providing the tension spring 94, when the annular slider 92 is not positioned and connected to the guide member 91 through the connecting member 96, the annular slider 92 can automatically slide to the upper end part of the second joint 9 under the action of the restoring force of the tension spring 94, which simplifies the operation steps. In order to move the annular slider 92 along the lower end of the guide member 91, after the seal 97 and the conductive rod 14 are aligned and connected by plugging, the position of the annular slider 92 is tightly connected through the connecting member 96, so that the first joint 8 internally threaded connected to the annular slider 92 is tightly connected to the tool shank 2.

[0065] Since the confluence channel 33 and the second channel 4 that need to be eccentrically arranged still need to be aligned after the thread fit, but due to the machining error in the positioning of the external thread of the first joint 8, this part of the error can be adjusted by the annular slider 92. In one embodiment, a circumferential chute is provided along the circumferential direction of the outer wall of the annular slider 92. The connecting part two of the connecting member 96 is connected to the annular slider 92 through an adjusting ring. The adjusting ring is embedded in the circumferential chute, and the thickness between the inner wall and the outer wall of the adjusting ring is lower than the depth of the circumferential chute, so that the setting of the adjusting ring will not affect the sliding of the annular slider 92 inside the guide member 91. The outer wall of the adjusting ring is provided with a connecting member two. Due to the constraint of the strip-shaped hole axially provided in the guide member 91 through which the connecting member two passes, the adjusting ring provided with the positioning member two is rotationally constrained, and the annular slider 92 can rotate under the constraint of the adjusting ring to rotate and adjust the first joint 8 installed inside the annular slider 92 until the confluence channel 33 and the second channel 4 are abutted and aligned.

[0066] Moreover, in order to avoid the interference of the tension spring 94 with the rotation of the annular slider 92, the tension spring of this embodiment is connected to the bottom of the tension spring through a thrust ball bearing, so that when the annular slider 92 rotates axially, the tension spring 94 connected to its top will not be affected.

[0067] Such as Figures 6-7As shown, after the annular slider 92 of this embodiment slides downward along the guide 91 so that the confluence channel 33 and the second channel 4 are in abutting connection and communication, at this time, the pressing ring 972 is inserted into the annular groove 971 of the seal 97. After the connecting member 96 fastens and connects the annular slider 92 and the guide 91, since the groove seal structure adopted by the seal 97 is eccentrically arranged relative to the cutter head 1 and the tool handle 2, after the annular groove 971 and the pressing ring 972 are matched, a local high-pressure contact area is generated in the threaded fit between the tool handle 2 and the cutter head 1 through geometric asymmetric design, and self-locking is formed by using friction to prevent the cutter head 1 from rotating under the conditions of vibration or force application, etc., and avoid the failure of the threaded connection and leakage.

[0068] In order to enable the end face for connecting the tool handle 2 and the cutter head 1 to be better matched, the tool handle 2 of this embodiment is provided with a positioning ring groove 22 for accommodating the positioning retaining ring 93, and a sealing ring is arranged on the surface of the positioning ring groove 22 opposite to the positioning retaining ring 93. When the positioning retaining ring 93 and the positioning ring groove 22 are in abutting connection and cooperation, under the acting force applied after the connecting member 96 is fastened, the sealing rings arranged on both end faces of the positioning retaining ring 93 and the positioning ring groove 22 are extruded, which can further improve the sealing performance between the tool body 11 and the tool handle 2.

[0069] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solutions is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A suction LEEP knife, characterized in that: The invention comprises a blade head (1), a blade handle (2) and a suction pump, wherein the blade head (1) is provided with a first channel (3), and the blade handle (2) is provided with two second channels (4); after the blade head (1) and the blade handle (2) are connected, the first channel (3) and the second channel (4) form a suction channel; the suction pump is connected to the end of the blade handle (2); the first channel (3) runs through the top of the blade head (1) and a suction port is provided; the suction pump extracts air from the suction port through the suction channel; the first channel (3) comprises a smoke channel (31), a cleaning channel (32) and two converging channels (33); the smoke channel (31) is provided in the middle of the blade head (1), the cleaning channel (32) is provided at both ends of the blade head (1), the two converging channels (33) are respectively used to connect the smoke channel (31) and the cleaning channel (32), and the two converging channels (33) are respectively connected to the two second channels (4) provided in the blade handle (2); A drainage mechanism (7) is arranged in the cleaning channel (32), the cleaning channel (32) comprising a vertical inlet channel (321), a horizontal inlet channel (322) and an arc-shaped converging channel (323) connected in sequence, the vertical inlet channel (321) being arranged perpendicular to the upper end of the cutter head (1), the drainage mechanism (7) comprising a screw conveying shaft (71), the screw conveying shaft (71) being arranged in the vertical inlet channel (321), the output port of the screw conveying shaft (71) being connected to the horizontal inlet channel (322); the drainage mechanism (7) further comprising a rotating wheel (72), the rotating wheel (72) being arranged at a connection position between the horizontal inlet channel (322) and the arc-shaped converging channel (323), the arc-shaped converging channel (323) being connected to the converging channel (33); the screw conveying shaft (71) and the rotating wheel (72) are connected to a driving motor, the rotating shaft of the rotating wheel (72) being perpendicular to the surface of the cutter head (1).

2. A suction LEEP knife according to claim 1, characterized in that: A diffusion mechanism (5) is provided at the suction port of the smoke channel (31), the diffusion mechanism (5) comprising a strip groove (51) and a flow equalizer plate (52), the two ends of the strip groove (51) extending towards the two ends of the cutter head (1), a plurality of air holes (53) are evenly distributed on the flow equalizer plate (52), the flow equalizer plate (52) is installed above the strip groove (51), and a flow air path (54) is formed between the flow equalizer plate (52) and the countersunk hole.

3. A suction LEEP knife according to claim 2, characterized in that: An adsorption filter (311) is arranged in the smoke channel (31); and / or an adsorption filter (311) is also arranged at the suction port of the smoke channel (31), the adsorption filter (311) is arranged in the strip groove (51), and the adsorption filter (311) is provided with a smoke hole (312) connected to the smoke channel (31).

4. The suction LEEP knife according to claim 1, characterized in that: The suction port of the cleaning channel (32) is provided with a side retaining ring (6), the side retaining ring (6) being a conical platform structure, the large-diameter end of the side retaining ring (6) being connected to the suction port, and the outer wall of the side retaining ring (6) being provided with a strip-shaped through hole (61).

5. The suction LEEP knife according to claim 1, characterized in that: The two second channels (4) are connected to a vacuum pump and a liquid pump respectively, and the two confluent channels (33) are symmetrically arranged on one side close to the surface of the cutter head (1), and the distance between the confluent channels (33) is smaller than the diameter of the electrode sheet (13).

6. The suction LEEP knife according to claim 1, characterized in that: The blade head (1) further comprises a blade body (11), an electric cutting wire (12), an electrode sheet (13) and a conductive rod (14); mounting openings are arranged at both ends of the blade head (1); the electric cutting wire (12) extends through the mounting openings to the middle of the blade head (1) to form a cutting ring; both ends of the electric cutting wire (12) are located inside the blade head (1) to connect to the electrode sheet (13); a conductive rod (14) is installed at the center of the blade body (11) to be electrically connected; the electric cutting wire (12) is electrically connected to the conductive rod (14) via the electrode sheet (13); and the conductive rod (14) extends to the outside of the blade body (11); and the blade handle (2) is provided with a portion for accommodating the conductive rod (14). A conductive slot (21) is provided, the conductive slot (21) cooperates with the conductive rod (14), the bottom of the conductive slot (21) is connected to a high-frequency current generator via a conductive wire, a plurality of control buttons are arranged outside the knife handle (2), the control buttons respectively control the current and the driving components in the channel, the second channel (4) of the knife handle (2) is distributed outside the conductive slot (21), and the second channel (4) and the conductive slot (21) are not intercommunication; a positioning component is provided between the conductive rod (14) and the conductive slot (21), and when the positioning component is in place, the first channel (3) extending in the blade (11) is aligned with the second channel (4) of the knife handle (2).

7. The suction LEEP knife according to claim 6, characterized in that: The cutter head (1) is provided with a first joint (8) for connecting to the cutter handle (2); the first joint (8) is provided at the end of a blade body (11) of the cutter head (1); a second joint (9) is provided at the top of the cutter handle (2); an external thread is provided on the outside of the first joint (8); an internal thread is provided on the inside of the second joint (9); the first joint (8) and the second joint (9) are threadedly connected; when the threads are in place, the converging channel (33) and the second channel (4) are aligned.

8. The suction LEEP knife according to claim 7, characterized in that: A sealing member (97) for positioning the sealing ring is also provided between the converging channel (33) and the second channel (4), the sealing member (97) comprising an annular groove (971) for constraining the sealing ring and a pressing ring (972) for pressing the sealing ring, the annular groove (971) being provided at the outer edge of the converging channel (33), and the pressing ring (972) being provided at the outer edge of the second channel (4); The second joint (9) comprises a guide member (91) and an annular slider (92) slidably engaged in the guide member (91), and an inner wall of the annular slider (92) is provided with an internal thread for threadably engaging with the first joint (8); A positioning retaining ring (93) is provided at the bottom of the annular sliding block (92); when the first joint (8) and the positioning retaining ring (93) are in place, the converging channel (33) and the second channel (4) are aligned.

9. The suction LEEP knife according to claim 8, characterized in that: The guide member (91) and the annular slider (92) further include a connecting member (96), the connecting member (96) being used to realize the positioning of the annular slider (92), the connecting member (96) including a connecting portion 1 and a connecting portion 2, the guide member (91) being provided with a strip hole along the axial direction, the connecting portion 1 being mounted on the outside of the guide member (91), the connecting portion 2 being mounted on the outer wall of the annular slider (92), the connecting portion 2 passing through the strip hole to be connected to the connecting portion 1 of the guide member (91); A support retaining ring (95) is provided on the top of the guide member (91), and the support retaining ring (95) and the annular sliding block (92) are connected via a tension spring (94).

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