Cervical coagulation instrument

Abstract

The application discloses a cervical heat coagulation instrument and relates to the technical field of surgical diagnosis and treatment instruments, which comprises a basic assembly, an operating rod, a handle and a shaft tube, a treatment head connected to one end of the shaft tube, an expansion assembly, an elastic net tube, a fixed ring and a permanent magnet ring, a jujube core shape of the elastic net tube in a natural state, the fixed ring fixedly connected to one end of the shaft tube close to the treatment head, and the permanent magnet ring sleeved on the shaft tube and located on the side away from the treatment head of the fixed ring. The cervical heat coagulation instrument is characterized in that the elastic net tube is radially expanded to form a hollow channel and prop open the cervical wall, so that the lesion is fully exposed and the operation field is continuously clear, the treatment head can be flexibly adjusted within a safe range by virtue of the super-elasticity of the elastic net tube, and the safety hazard of scalding the cervical canal or normal tissues in the uterus caused by inserting too deep due to misoperation is avoided.

Description

Technical Field

[0001] This invention relates to the field of surgical diagnostic and therapeutic instruments, and more specifically, to a cervical thermocoagulation device. Background Technology

[0002] Cervical thermocoagulation is a common surgical instrument. It is a commonly used gynecological treatment device that uses heat energy to coagulate and ablate cervical lesions. It has the advantages of simple operation, minimal bleeding, and can be performed in outpatient settings. It is widely used in the treatment of diseases such as cervical erosion and cervical polyps. Current cervical thermocoagulation devices usually consist of a main unit, a handle, a shaft tube, and a treatment probe. During treatment, the treatment probe needs to be inserted into the cervix so that the treatment head contacts the cervical lesion for thermocoagulation treatment.

[0003] However, existing cervical thermocoagulation devices have the following problems in use: First, the operation lacks safety protection. The existing operating rod is just a bare rod structure without a physical depth limiting structure. The insertion depth of the treatment head depends entirely on the operator's feel. It is easy to accidentally insert too deeply, which may burn the cervical canal or normal tissue inside the uterus, posing a safety hazard. At the same time, the field of view (surgical field) is not exposed enough. There is no dilation structure designed next to the treatment probe to extend into the deep cervix along with the treatment probe. Even if there is a dilator to expand the field of view when the treatment probe is inserted into the cervix, the extension length of the dilator itself is limited. It is difficult to maintain a good dilation effect in the deep cervix. Therefore, under the natural tightening of the human vaginal and cervical tissue, it is difficult for doctors to directly observe the contact between the treatment head and the lesion. They are often in a state of "blind operation" or "semi-blind operation", which affects the accuracy of treatment. Second, the treatment head is inconvenient to replace. In order to adapt to different lesion morphologies, multiple models of treatment heads are usually required. The existing treatment head and shaft tube are mostly connected by threaded screws or snap-fit ​​structures. When replacing, it is necessary to repeatedly screw or press, which is cumbersome. In addition, there are small gaps in the connection parts, making it difficult to thoroughly clean and disinfect after use, which poses a risk of cross-infection.

[0004] To address the above problems, a cervical thermocoagulation device is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, a cervical thermocoagulation device is provided, which solves the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention can be implemented using the following technical solutions: This invention provides a cervical thermocoagulation device, comprising: The basic components include an operating lever, which consists of a handle and a shaft tube, and a treatment head connected to one end of the shaft tube; The expansion assembly includes an elastic mesh tube, a fixing ring and a permanent magnet ring fixedly connected to both ends of the elastic mesh tube. In its natural state, the elastic mesh tube is shaped like a date pit with a radial bulge in the middle. The fixing ring is fixedly connected to one end of the shaft tube near the treatment head. The permanent magnet ring is sleeved on the shaft tube and located on the side of the fixing ring away from the treatment head. It also includes an electromagnetic coil fixedly connected to the shaft tube and located on the side of the permanent magnet ring away from the elastic mesh tube. When energized, the electromagnetic coil is used to drive the permanent magnet ring to move axially along the shaft tube through magnetic field force. When the permanent magnet ring moves toward the elastic mesh tube, it compresses axially and expands radially. The expanded elastic mesh tube simultaneously forms: a hollow channel that opens the cervical wall and exposes the lesion area, a depth-limiting structure located behind the treatment head to prevent it from going too deep, and a flexible support structure that passively deforms and maintains support as the treatment head moves. The quick-release assembly includes a thin-walled tube, one end of which is fixedly connected to the treatment head, and the other end of which is sleeved on the outside of the shaft tube away from the handle. A circumferential anti-dislodgement flange is provided around the other end of the thin-walled tube, and multiple axially extending notches are provided on the other end of the tube wall to divide it into several elastic flaps. It also includes a rubber locking ring sleeved on the outside of the thin-walled tube to force the elastic flaps to contract radially so that the inner wall of the thin-walled tube is tightly attached to the shaft tube.

[0007] Furthermore, the basic components also include a main unit, an external cable, and an internal cable that runs through the control lever. The main unit is connected to one end of the internal cable located inside the handle via the external cable, and the other end of the internal cable located inside the shaft tube is connected to the treatment head.

[0008] Furthermore, the elastic mesh tube is laser-cut from a super-elastic nickel-titanium alloy, and its mesh is in the shape of a diamond grid.

[0009] Furthermore, the permanent magnet ring is axially magnetized, with the end facing the elastic vascular bundle as the first magnetic pole and the end away from the elastic vascular bundle as the second magnetic pole. When the electromagnetic coil is supplied with a current in the first direction, the electromagnetic coil attracts the permanent magnet ring to move towards the electromagnetic coil, causing the elastic vascular bundle to elongate axially and contract radially, thus forcing the elastic vascular bundle to become thinner and smoothly enter and exit the cervix. When the electromagnetic coil is supplied with a current in the second direction, the electromagnetic coil repels the permanent magnet ring to move towards the elastic vascular bundle, causing the elastic vascular bundle to compress axially and expand radially.

[0010] Furthermore, the expansion assembly also includes several protrusions that extend axially along the shaft tube and are uniformly fixedly connected around the circumference of the shaft tube. The protrusions abut against the inner wall of the permanent magnet ring to guide the permanent magnet ring to move axially and allow the permanent magnet to rotate around the shaft tube axis. An axially extending cleaning channel is formed between adjacent protrusions.

[0011] Furthermore, the outer surface of the end of the shaft tube that mates with the inner wall of the thin-walled tube is configured with a frosted surface.

[0012] Furthermore, it also includes auxiliary components, including a miniature camera fixedly connected to the shaft tube and located between the treatment head and the fixation ring, with its lens facing the treatment head, and an air intake on the side wall of the shaft tube opposite the miniature camera, which is used to remove smoke that obscures the surgical field.

[0013] Furthermore, the auxiliary components also include an exhaust channel fixedly installed inside the operating lever. The exhaust channel extends along the axial direction of the operating lever, with one end connected to the air intake and the other end extending to the handle for connection with the air pump. An auxiliary air port connected to the exhaust channel is provided on the side wall of the shaft tube near the handle for injecting disinfectant into the exhaust channel for cleaning. The orifice area of ​​the auxiliary air port is smaller than that of the air intake port.

[0014] As described above, the features and advantages of the cervical thermocoagulation device of the present invention are: This invention fixes one end of an elastic mesh tube to the shaft tube near the treatment head via a fixing ring, and the other end is fixedly connected to a permanent magnet ring. When the permanent magnet ring moves towards the elastic mesh tube, causing the elastic mesh tube to compress axially and expand radially, the expanded elastic mesh tube simultaneously forms a depth-limiting structure and a flexible support structure located behind the treatment head. The depth-limiting structure utilizes the physical boundary formed by the expanded mesh to prevent the treatment head from going too deep as it moves forward, thus avoiding the safety hazard of burning the cervical canal or normal uterine tissue due to accidental insertion. The flexible support structure relies on the hyperelasticity of the elastic mesh tube itself, and passively deforms locally as the treatment head moves during operation, conforming to the direction of the operator's force. This allows the treatment head to flexibly adjust its angle within a safe range to align with lesions in different locations. Through the above structure, the problem of the lack of physical depth limitation in existing bare rod operating rods is solved, achieving a balance between operational safety and flexibility. At the same time, the elastic mesh tube is also a follow-up structure that can extend into the depths of the cervix along with the treatment probe, effectively compensating for the insufficient dilation effect of vaginal dilators on the deep cervical region.

[0015] This invention utilizes an elastic mesh tube laser-cut from a highly elastic nickel-titanium alloy. In its natural state, the mesh tube is pre-shaped like a date pit with a radial bulge in the center. When the elastic mesh tube is axially compressed and radially expanded, it forms a hollow channel that opens the cervical wall, allowing light to penetrate the rhomboid mesh and reach the lesion area. Simultaneously, a miniature camera is fixed to the side wall of the axial tube, positioned between the treatment head and the fixing ring, with its lens facing the treatment head. An air intake is located on the opposite side of the camera, allowing smoke generated during treatment to be drawn away through the air intake. Through the synergistic effect of these structures, full exposure of the lesion area and continuous clarity of the surgical field are achieved. This solves the problem of "blind operation" or "semi-blind operation" caused by tissue obstruction and smoke accumulation in existing instruments, significantly improving treatment accuracy and operational continuity.

[0016] This invention features a quick-release assembly. During installation, the rubber locking ring is placed over the anti-detachment flange and fitted onto the outer circumference of the elastic flap, forcing the elastic flap to contract radially and tightly press the inner wall of the thin-walled tube against the frosted surface of the shaft tube, achieving reliable fixation. During disassembly, the rubber locking ring is simply detached from the elastic flap, which automatically springs open, allowing the treatment head to separate from the shaft tube. This structure eliminates the need for screwing or snap-fitting, enabling quick manual replacement. Furthermore, all components have no internal precision mating surfaces, allowing direct exposure to cleaning solutions and eliminating the possibility of dirt and grime accumulating in small gaps. This structure solves the problems of inconvenient replacement and sterilization blind spots inherent in existing threaded or snap-fit ​​structures, achieving the dual goals of rapid treatment head replacement and thorough sterilization.

[0017] This invention utilizes an elastic mesh tube that naturally forms a jujube-shaped structure with a radial bulge in the center, allowing the rhomboid mesh to fully open under normal conditions. This enables the cleaning fluid to penetrate all the mesh openings without obstruction, avoiding the problem of narrow gaps formed by the compression of straight cylindrical mesh tubes, which can trap dirt and grime.

[0018] This invention features raised strips that abut against the inner wall of a permanent magnet ring, allowing the permanent magnet to rotate around the axis of the shaft tube. A cleaning channel is formed between adjacent raised strips. Rotating the permanent magnet ring allows the contact surfaces of its inner wall and the raised strips to be alternately exposed to the cleaning solution, avoiding the disinfection dead zones formed by the contact surfaces always being in contact in traditional sliding fits. At the same time, an auxiliary air port is provided on the side wall of the shaft tube near the handle. The diameter of the auxiliary air port is smaller than that of the air inlet. During cleaning, disinfectant can be injected into the exhaust channel through the auxiliary air port to achieve internal rinsing and disinfection of the slender closed tube, solving the problem that conventional soaking disinfection cannot ensure that the inner wall is completely in contact with the disinfectant. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the cervical thermocoagulation device shown in this invention; Figure 2 for Figure 1 Another perspective diagram of the structure; Figure 3 This is a schematic diagram of the expansion assembly of the cervical thermocoagulation device shown in this invention. Figure 4 This is a schematic diagram of the permanent magnet ring and the raised strip structure of the cervical thermocoagulation instrument shown in this invention. Figure 5 This is a schematic diagram of the quick-release assembly of the cervical thermocoagulation device shown in this invention. Figure 6 This is an exploded view of the quick-release component structure of the cervical thermocoagulation device shown in this invention. Figure 7 This is a schematic diagram of the internal structure of the operating lever of the cervical thermocoagulation device shown in this invention. Figure 8 This is a schematic diagram of the operating lever handle of the cervical thermocoagulation device shown in this invention.

[0020] The reference numerals in the accompanying drawings of this invention are as follows: Basic components: 11. Control lever; 12. Treatment head; 13. Main unit; 14. External cable; Expansion components: 21. Flexible mesh tube; 22. Fixing ring; 23. Permanent magnet ring; 24. Raised strip; 25. Electromagnetic coil; Quick-release components: 31. Thin-walled tube; 32. Anti-detachment flange; 33. Notch; 34. Rubber locking ring; Auxiliary components: 41. Miniature camera; 42. Air intake; 43. Exhaust channel; 44. Auxiliary air intake. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] See Figures 1-8 As shown, an embodiment of the present invention is provided, and a cervical thermocoagulation device will be described in detail below: See Figures 1-2 As shown, a cervical thermocoagulation device includes a basic component, which includes an operating lever 11. The operating lever 11 includes a handle and a shaft tube, and a treatment head 12 connected to one end of the shaft tube. Further, the basic component includes a main unit 13, an external cable 14, and an internal cable inserted inside the operating lever 11. The main unit 13 is connected to the end of the internal cable located inside the handle via the external cable 14, and the end of the internal cable located inside the shaft tube is connected to the treatment head 12. The external cable 14 has a standard medical plug at one end, and a matching socket at the end of the handle for quick insertion and removal. The internal cable and the treatment head 12 can use concentric ring contacts or pin-type interfaces to ensure stable signal and energy transmission. The treatment head 12 has a Teflon coating to prevent adhesion to mucosal tissue, and integrates a temperature sensor to detect whether the temperature of the treatment head 12 meets the set value. The operating methods of the main unit 13 and the electrical connection methods described above are conventional techniques in the field and will not be elaborated further.

[0023] See Figures 1-4As shown, the cervical thermocoagulation device also includes an expansion component, which includes an elastic mesh tube 21, a fixing ring 22 and a permanent magnet ring 23 fixedly connected to both ends of the elastic mesh tube 21. In its natural state, the elastic mesh tube 21 has a date-shaped structure with a radial bulge in the center. Furthermore, the elastic mesh tube 21 is laser-cut from a superelastic nickel-titanium alloy, with a rhomboid mesh. The superelastic nickel-titanium alloy is chosen because of its excellent superelasticity, biocompatibility, and corrosion resistance, allowing it to maintain constant stress and fully recover within a large strain range. During axial compression, the rhomboid mesh shortens its long axis and lengthens its short axis, achieving uniform radial expansion. The date-shaped pre-bulge ensures that the mesh is fully open in its normal state, allowing the cleaning fluid to penetrate all the meshes without obstruction, preventing dirt accumulation in narrow gaps. Simultaneously, during axial compression, the pre-existing bulge in the center is more likely to arch outwards, ensuring reliable expansion. The fixing ring 22 is fixedly connected to the shaft tube near the treatment head 12. The permanent magnet ring 23 is sleeved on the shaft tube and located on the side of the fixed ring 22 away from the treatment head 12. It also includes an electromagnetic coil 25 fixedly connected to the shaft tube and located on the side of the permanent magnet ring 23 away from the elastic mesh tube 21. When energized, the electromagnetic coil 25 is used to drive the permanent magnet ring 23 to move axially along the shaft tube through magnetic force. Furthermore, the permanent magnet ring 23 is axially magnetized, with the end facing the elastic mesh tube 21 as the first magnetic pole and the end away from the elastic mesh tube 21 as the second magnetic pole. When the electromagnetic coil 25 is supplied with a current in the first direction, the electromagnetic coil 25 attracts the permanent magnet ring 23 to move in the direction of the electromagnetic coil 25, causing the elastic mesh tube 21 to extend axially and contract radially, so as to force the elastic mesh tube 21 to become thinner as a whole and smoothly enter and exit the cervix. When the electromagnetic coil 25 is supplied with a current in the second direction, the electromagnetic coil 25 repels the permanent magnet ring 23 to move in the direction of the elastic mesh tube 21, causing the elastic mesh tube 21 to compress axially and expand radially, thereby dilating the inner wall of the cervix.

[0024] As the permanent magnet ring 23 moves toward the elastic mesh tube 21, it is axially compressed and radially expanded. The expanded elastic mesh tube 21 simultaneously forms: a hollow channel that opens the cervical wall and exposes the lesion area (the line of sight is guaranteed by the mesh); a depth-limiting structure located behind the treatment head 12 to prevent it from penetrating too deeply; and a flexible support structure that passively deforms and maintains support as the treatment head 12 moves. Among them, the depth-limiting structure uses the physical boundary formed by the expanded mesh to limit the penetration range of the treatment head 12, avoiding burns to normal tissue; the flexible support structure relies on the hyperelastic properties of the elastic mesh tube 21 itself, and is locally passively deformed when the treatment head 12 touches it to conform to the direction of the operator's force. At the same time, the mesh as a whole maintains the state of opening the cervical wall, which does not hinder fine operation and continuously maintains the exposure of the surgical field. That is, after expansion, it not only limits the large-range movement of the treatment head 12 to prevent accidental movement, but also allows it to swing and move freely within a small range to ensure the flexibility of treatment, achieving a high structural synergy effect.

[0025] For further details, please refer to [link / reference]. Figure 4As shown, the expansion assembly also includes several protrusions 24. The protrusions 24 extend axially along the shaft tube and are uniformly fixedly connected around the circumference of the shaft tube. The protrusions 24 abut against the inner wall of the permanent magnet ring 23 to guide the permanent magnet ring 23 to move axially and allow the permanent magnet ring 23 to rotate around the shaft tube axis. An axially extending cleaning channel is formed between adjacent protrusions 24. In this structure, the protrusions 24 and the inner wall of the permanent magnet ring 23 are abutted rather than tightly sliding, with a small gap between them. By rotating the permanent magnet ring 23, the contact surface between its inner wall and the protrusions 24 can be alternately exposed to the cleaning liquid, avoiding the disinfection dead corners formed by the contact surfaces always being in contact in the traditional sliding fit. The cleaning channel between adjacent protrusions 24 further ensures that the cleaning liquid flows to all areas, achieving thorough disinfection without dead corners.

[0026] See Figures 5-6 As shown, the cervical thermocoagulation device also includes a quick-release assembly, which includes a thin-walled tube 31. One end of the thin-walled tube 31 is fixedly connected to the treatment head 12, and the other end is sleeved on the outside of the end of the shaft tube away from the handle. A circumferential anti-detachment flange 32 is provided around the other end of the thin-walled tube 31. Multiple axially extending notches 33 are formed in the wall of the other end of the thin-walled tube 31 to divide it into several elastic flaps. A rubber locking ring 34 is also included on the outside of the thin-walled tube 31 to force the elastic flaps to contract radially so that the inner wall of the thin-walled tube 31 is tightly attached to the shaft tube. Furthermore, the outer surface of the end of the shaft tube that mates with the inner wall of the thin-walled tube 31 is configured with a frosted surface. The frosted surface increases friction to prevent accidental detachment of the treatment head 12, and the surface is free of small grooves or gaps, making it easy to clean and disinfect. During installation, the thin-walled tube 31 is fitted onto the distal end of the shaft tube, and the rubber locking ring 34 is pushed onto the shaft tube towards the treatment head 12. After passing the anti-dislodgement flange 32, it is fitted onto the outer periphery of the elastic flap. The elastic flap is radially tightened by the circumferential contraction of the rubber itself, thus achieving reliable fixation between the thin-walled tube 31 and the shaft tube. During disassembly, the rubber locking ring 34 is pulled off the elastic flap, and the elastic flap automatically pops open, allowing the treatment head 12 to separate from the shaft tube. Compared with existing quick-release structures (such as threaded quick-release mechanisms, ball-sliding sleeve quick-release mechanisms, etc.), this structure has no internal precision mating surfaces, and all components can be directly exposed to the cleaning solution. There are no small gaps for dirt to accumulate, making it more targeted to the needs of the application environment in this field and achieving better application results.

[0027] See Figures 5-8As shown, the cervical thermocoagulation device also includes auxiliary components, including a miniature camera 41 fixedly connected to the shaft tube and located between the treatment head 12 and the fixing ring 22, with its lens facing the treatment head 12. In this embodiment, the miniature camera 41 integrates a miniature LED light and is connected to a display (existing conventional technology, not shown in the figure) to allow the operator to observe the inside of the cervix more clearly. The connection wiring is consistent with the internal cable wiring method, both running through the shaft tube and the handle. Furthermore, an air intake 42 is located on the side wall of the shaft tube opposite to the miniature camera 41, which is used to remove smoke that obstructs the surgical field (such as smoke produced when burning lesions). Furthermore, the auxiliary components also include an exhaust channel 43 fixedly disposed inside the operating rod 11. The exhaust channel 43 extends along the axial direction of the operating rod 11, with one end communicating with the air intake 42 and the other end extending to the handle portion. Figure 8 A tubular structure extending obliquely at a certain angle to the axis of the operating lever 11 is used for connection and conduction with an air pump (existing conventional technology, not shown in the figure). In this embodiment, see [reference]. Figures 7-8 As shown, the exhaust channel 43 is built into the operating rod 11 and occupies only half of the space. The other half of the space inside the operating rod 11 is the space for the various cables. An auxiliary air port 44 is opened on the side wall of the shaft tube near the handle, which is connected to the exhaust channel 43. It is used to inject disinfectant into the exhaust channel 43 for cleaning. The orifice area of ​​the auxiliary air port 44 is smaller than that of the inhalation port 42. With this design, the negative pressure is mainly concentrated in the inhalation port 42 during normal suction, ensuring smoke extraction efficiency. During cleaning, disinfectant can be injected through the auxiliary air port 44 and fill the exhaust channel 43 to achieve thorough disinfection of the internal pipeline. The auxiliary air port 44 can also be used as a rinsing port. Before using the instrument, physiological saline is injected to moisten the channel to prevent tissue debris from adhering. In addition, if the inhalation port 42 is blocked by human tissue, the auxiliary air port 44 can ensure the smooth operation of the suction pump. On the one hand, it avoids the discomfort caused to the patient as the negative pressure inside the exhaust channel 43 gradually increases when only the inhalation port 42 is set. On the other hand, it can also prevent the suction pump from "suffocating" and buy time for the operator to deal with abnormal situations.

[0028] Working principle: The cervical thermocoagulation device of the present invention operates according to the following steps: Entry Stage: The electromagnetic coil 25 is energized with a current in the first direction, generating a magnetic field opposite to the second magnetic pole of the permanent magnet ring 23. This magnetic field attracts the permanent magnet ring 23 to move towards the electromagnetic coil 25. The permanent magnet ring 23 causes the elastic mesh tube 21 to extend axially. Due to the axial stretching, the elastic mesh tube 21 contracts radially, reducing its overall diameter. At this time, the operator holds the handle and inserts the treatment head 12 along with the elastic mesh tube 21 into the cervix until the treatment head 12 reaches the cervical lesion area. The elastic mesh tube 21 is in a contracted state with a smaller outer diameter, allowing it to pass smoothly through the cervix and reducing patient discomfort.

[0029] During the expansion phase: After the treatment head 12 is in place, the electromagnetic coil 25 switches to the second direction current, generating a magnetic field identical to the second magnetic pole of the permanent magnet ring 23. This repels the permanent magnet ring 23 from moving towards the elastic mesh tube 21. The permanent magnet ring 23 axially compresses the elastic mesh tube 21, causing it to expand radially due to the axial compression. Its pre-bulged date-shaped cross-section further arches outward, opening the cervical wall to form a hollow channel and exposing the lesion area. The expanded elastic mesh tube 21 simultaneously achieves three functions: 1. The openwork design allows light to penetrate the mesh and reach the lesion directly, ensuring an unobstructed surgical field; 2. The expanded elastic mesh tube 21 is located behind the treatment head 12. When the treatment head 12 moves forward, it is "pulled" by the elastic mesh tube 21 and cannot penetrate too deeply, forming a physical depth limit boundary to prevent burns to surrounding tissues. 3. While the elastic mesh tube 21 remains in an overall open state, its super-elastic material properties allow the elastic mesh tube 21 to be locally passively deformed when the treatment head 12 swings or moves forward and backward in a small range during operation, conforming to the direction of the operator's force and not hindering the fine operation, while still maintaining the overall support for the cervical wall.

[0030] Treatment phase: The miniature camera 41 acquires real-time images of the lesion. The operator observes the lesion area through a monitor and performs thermocoagulation treatment using the treatment head 12. Smoke generated during treatment is suctioned out by an air pump through the suction port 42 and exhaust channel 43, maintaining a clear surgical field. The position and angle of the treatment head 12 are flexibly controlled by the operator via a handle. The flexible support structure of the elastic mesh tube 21 allows for slight movement of the treatment head 12 while maintaining cervical wall dilation and depth protection.

[0031] Withdrawal and Disinfection Phase: After treatment, the electromagnetic coil 25 resumes current in the first direction, and the elastic mesh tube 21 retracts radially due to axial elongation, allowing the operator to withdraw the entire device. After withdrawal, the rubber locking ring 34 is removed from the thin-walled tube 31, and the elastic flap automatically opens, separating the treatment head 12 from the shaft tube. The shaft tube can be soaked or rinsed as a whole. The cleaning solution flows in through the gap between the convex strip 24 and the permanent magnet ring 23 and the cleaning channel. Rotating the permanent magnet ring 23 alternately exposes the contact surface between its inner wall and the convex strip 24, ensuring thorough cleaning. In its natural state, the mesh of the elastic mesh tube 21 is fully open, allowing the cleaning solution to penetrate all meshes without obstruction. The exhaust channel 43 is disinfected by injecting disinfectant through the auxiliary air port 44. The diameter of the auxiliary air port 44 is smaller than that of the intake port 42, ensuring that the smoke extraction efficiency is not affected during normal use. All components can be disinfected without dead angles, meeting the hygiene requirements for reusable medical devices.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cervical thermocoagulation device, characterized in that, include: The basic components include an operating lever (11), which includes a handle and a shaft tube, and also includes a treatment head (12) connected to one end of the shaft tube. The expansion assembly includes an elastic mesh tube (21), a fixing ring (22) and a permanent magnet ring (23) fixedly connected to both ends of the elastic mesh tube (21). In its natural state, the elastic mesh tube (21) is shaped like a date pit with a radial bulge in the middle. The fixing ring (22) is fixedly connected to one end of the shaft tube near the treatment head (12). The permanent magnet ring (23) is sleeved on the shaft tube and located on the side of the fixing ring (22) away from the treatment head (12). It also includes an electromagnetic coil (25) fixedly connected to the shaft tube and located on the side of the permanent magnet ring (23) away from the elastic mesh tube (21). When energized, it is used to drive the permanent magnet ring (23) to move along the shaft tube axially through magnetic field force. When the permanent magnet ring (23) axially compresses the elastic mesh tube (21) to make it expand radially, the expanded elastic mesh tube (21) simultaneously forms: A hollow channel that opens the cervical wall and exposes the lesion area, a depth-limiting structure located behind the treatment head (12) to prevent it from going too deep, and a flexible support structure that passively deforms and maintains support as the treatment head (12) moves. The quick-release assembly includes a thin-walled tube (31), one end of which is fixedly connected to the treatment head (12), and the other end is sleeved on the outside of the end of the shaft tube away from the handle. A circumferential anti-dislodgement flange (32) is provided around the other end of the thin-walled tube (31). The other end of the thin-walled tube (31) has multiple axially extending notches (33) to divide it into several elastic flaps. It also includes a rubber locking ring (34) sleeved on the outside of the thin-walled tube (31) to force the elastic flaps to contract radially so that the inner wall of the thin-walled tube (31) is tightly attached to the shaft tube. The permanent magnet ring (23) is axially magnetized. The end facing the elastic reticular tube (21) is the first magnetic pole, and the end away from the elastic reticular tube (21) is the second magnetic pole. When the electromagnetic coil (25) is supplied with a current in the first direction, the electromagnetic coil (25) attracts the permanent magnet ring (23) to move towards the electromagnetic coil (25), causing the elastic reticular tube (21) to lengthen axially and contract radially, so as to force the elastic reticular tube (21) to become thinner and smoothly enter and exit the cervix. When the electromagnetic coil (25) is supplied with a current in the second direction, the electromagnetic coil (25) repels the permanent magnet ring (23) to move towards the elastic reticular tube (21), causing the elastic reticular tube (21) to compress axially and expand radially. It also includes auxiliary components, including a miniature camera (41) fixedly connected to the shaft tube and located between the treatment head (12) and the fixation ring (22), with its lens facing the treatment head (12), and an air intake (42) located on the side wall of the shaft tube opposite the miniature camera (41), which is used to remove smoke that obscures the surgical field.

2. The cervical thermocoagulation device according to claim 1, characterized in that: The basic components also include a main unit (13), an external cable (14) and an internal cable that runs through the operating lever (11). The main unit (13) is connected to one end of the internal cable inside the handle via the external cable (14), and the other end of the internal cable inside the shaft tube is connected to the treatment head (12).

3. The cervical thermocoagulation device according to claim 1, characterized in that: The elastic mesh tube (21) is laser-cut from a super-elastic nickel-titanium alloy, and its mesh is in the shape of a diamond grid.

4. The cervical thermocoagulation device according to claim 1, characterized in that: The expansion assembly also includes several protrusions (24), which extend axially along the shaft tube and are uniformly fixedly connected around the circumference of the shaft tube. The protrusions (24) abut against the inner wall of the permanent magnet ring (23) to guide the permanent magnet ring (23) to move axially and allow the permanent magnet ring (23) to rotate around the shaft tube axis. An axially extending cleaning channel is formed between adjacent protrusions (24).

5. The cervical thermocoagulation device according to claim 1, characterized in that: The outer surface of the end of the shaft tube that mates with the inner wall of the thin-walled tube (31) is configured with a frosted surface.

6. A cervical thermocoagulation device according to claim 5, characterized in that: The auxiliary components also include an exhaust channel (43) fixedly installed inside the operating lever (11). The exhaust channel (43) extends along the axial direction of the operating lever (11), with one end connected to the air intake (42) and the other end extending to the handle for connection with the air pump. An auxiliary air port (44) connected to the exhaust channel (43) is provided on the side wall of the shaft tube near the handle for injecting disinfectant into the exhaust channel (43) for cleaning. The orifice area of ​​the auxiliary air port (44) is smaller than that of the air intake (42).

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