Guided measurable integrated cervical lEEP knife head assembly

Abstract

This invention relates to the field of medical device technology, specifically to a guided, measurable integrated blade assembly for cervical LEEP surgery. The assembly includes a central column, a vernier sleeve, a rotary push assembly, a pull cord, a pivot shaft, a rope-driven assembly, and a cutting module. A guide probe is located at the top of the central column, comprising a rotating and telescopic column section and a screw-in portion. The guide probe is connected to the central column via the screw-in portion. A support sleeve is fixedly mounted in the middle of the central column, and the cutting module is mounted on the support sleeve. An operating sleeve is fixedly mounted at the rear of the central column, and a rope-driven assembly for controlling the pull cord is mounted on the side of the operating sleeve. The vernier sleeve is slidably fitted onto the outside of the central column. The guide probe of this invention provides navigation constraints along the cervical canal direction to prevent blade deflection; the vernier support provides depth limiting constraints by abutting against the external cervical os, ensuring consistent circumferential resection depth.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a guided, measurable integrated blade assembly for cervical LEEP surgery, which is particularly suitable for loop electrosurgical excision procedure (LEEP) of cervical precancerous lesions and early cervical cancer. Background Technology

[0002] LEEP (Loop Electrosurgical Excision Procedure) is an important method for diagnosing and treating precancerous lesions and early cervical cancer. However, existing LEEP instruments have the following clinical drawbacks: High operational difficulty: The direction, depth, and width of resection rely entirely on the surgeon's subjective experience, making it difficult for primary care physicians to master, resulting in a long learning curve. Inaccurate resection: For patients with a history of pelvic or abdominal surgery, cervical surgery, cervical atrophy in the elderly, or abnormal cervical morphology, existing LEEP blades are prone to directional deviation, leading to residual lesions or over-resection. Impaired fertility: The depth and circumferential consistency of resection are difficult to control, easily causing complications such as cervical canal adhesions, premature birth, and miscarriage. Although some literature has proposed LEEP blades or limiters with graduations, current solutions still cannot simultaneously solve the two core problems of guiding the resection direction and accurately limiting the resection depth, and lack an integrated design that can be remotely adjusted and adapted to different cervical anatomy structures. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a guided, measurable integrated cervical LEEP blade assembly to address the shortcomings of the prior art.

[0004] The technical problem to be solved by the present invention is achieved through the following technical solution: The present invention discloses a guided, measurable integrated cervical LEEP blade assembly, including a central column, a vernier sleeve, a rotary push assembly, a pull rope, a pivot shaft, a rope-driven assembly, and a cutting module. A guide probe is provided at the top of the central column, the guide probe includes a rotating and telescopic column section, and the guide probe has a screw-in part. The guide probe is connected to the central column through the screw-in part. A support sleeve is fixedly provided in the middle of the central column, and the cutting module is installed in the support sleeve. An operating sleeve is fixedly provided at the rear. A rope-moving component for controlling the pull rope is installed on the side of the operating sleeve. The vernier sleeve is slidably fitted on the outside of the central column. A connecting support column is provided at the top of the vernier sleeve. The bearing sleeve is provided with a column hole. The connecting support column passes through the column hole and is connected to a support tray. The support tray contacts and is installed with a vernier support body. The vernier support body is used to abut against the external os of the cervix to limit the resection depth. A rotary push component for remote positioning is provided between the vernier sleeve and the operating sleeve. The central column is provided with a scale section at the front of the operating sleeve.

[0005] Furthermore, the rope-driven assembly includes a rope-controlled screw and a rope drum. The side of the operating sleeve is provided with an upwardly inclined extension screw seat. The rope-controlled screw is rotatably connected to the extension screw seat. The end of the rope-controlled screw is provided with a rope drum, and a pull rope is fixedly wound around the rope drum. The rope drum is located above the operating sleeve.

[0006] Furthermore, the vernier support body includes a pressure strip and a connecting ring. The connecting ring is a C-shaped open semi-closed ring. The side of the connecting ring is provided with an L-shaped outer support arm, and the outer support arm is provided with a pressure strip.

[0007] Furthermore, the support tray is a U-shaped cross-section disc with a central hole, and the support tray is slidably sleeved with the central column through the central hole. The outer diameter of the sleeve ring is smaller than the inner diameter of the U-shape of the support tray.

[0008] Furthermore, a cutting module is slidably mounted on the front of the bearing sleeve. The cutting module includes a deflecting arc strip, an obliquely outward extension, and a tungsten wire. The obliquely outward extension is located on the right side of the deflecting arc strip. One end of the tungsten wire is connected to the obliquely outward extension, and the other end is connected to the front of the central column. The deflecting arc strip is slidably connected to the bearing sleeve. A worm gear section is provided on the rear side of the deflecting arc strip. A turning shaft is installed on the rear of the bearing sleeve. A worm gear section that meshes with the worm gear section is provided in the middle of the turning shaft.

[0009] Furthermore, the bearing sleeve is provided with L-shaped upward inclined mounting arms on both sides, and a conical groove is provided on the inner side of the end of the mounting arm. The actuating shaft is rotatably clamped between the two mounting arms through the conical groove. The worm gear part is provided with a rope winding part on the side, and the actuating shaft is driven to the rope actuation assembly through the rope winding part.

[0010] Furthermore, the worm gear section is a worm-like structure with an incomplete arc segment, and the worm gear section includes a continuous and uniform meshing groove provided within the arc segment range, the meshing groove being used for contact with the teeth of the worm section.

[0011] Furthermore, the front part of the bearing sleeve is fixedly provided with an arc-shaped slide bar that is adapted to the curvature of the deflection arc bar. The arc-shaped slide bar is provided with an arc-shaped extending limiting groove, and the deflection arc bar is provided with an arc-shaped extending corresponding limiting protrusion. The limiting protrusion and the limiting groove cooperate to form an arc-shaped sliding connection relationship.

[0012] Furthermore, the rotary push assembly includes a spiral block, a sleeve block, and a positioning screw bolt. The spiral block is fixed to the outside of the vernier sleeve, the sleeve block is fixed to the outside of the operating sleeve, and the positioning screw bolt passes through the sleeve block and is screwed into the spiral block. The sleeve block is used for axial limiting connection with the positioning screw bolt.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) The present invention achieves precise resection through dual constraints of direction and depth: the guide probe provides navigation constraints along the direction of the cervical canal to prevent the blade from deviating; the vernier support provides depth limiting constraints by abutting against the external os of the cervix to ensure consistent circumferential resection depth. The two work together to make the resection range precise and controllable.

[0015] (2) This invention can reduce the difficulty of operation and facilitate its promotion at the grassroots level: it allows doctors to operate without relying entirely on subjective experience to judge the direction and depth of resection, and can precisely control the depth and range of resection through preset parameters, avoiding excessive resection of cervical tissue, reducing the risk of postoperative cervical canal adhesion, premature birth and miscarriage, and helping to protect fertility.

[0016] (3) The present invention improves operational flexibility by remotely driving the cutter through measurable and adjustable components: the scale segment on the central column, together with the vernier sleeve, can quantitatively set the cutting depth; the rope drive component and worm gear structure can remotely control the tungsten wire unfolding angle to achieve precise adjustment of tapered cutting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the installation structure of the vernier support 21 and the support tray 23 of the present invention;

[0019] Figure 3 This is a partial schematic diagram of the driving mechanism on the bearing sleeve 12 of the present invention;

[0020] 1-Central column, 11-Guide probe, 111-Rotating telescopic column section, 112-Screw joint, 12-Bearing sleeve, 121-Mounting support arm, 13-Operating sleeve, 14-Scale section, 2-Vernier sleeve, 21-Vernier support body, 211-Pressure bar, 212-Socket ring, 22-Connecting support column, 23-Supporting tray, 3-Rotating push assembly, 31-Spiral block, 32-Socket block, 33-Positioning bolt, 4-Pull rope, 5-Actuating shaft, 51-Worm section, 6-Rope-driven assembly, 61-Rope-controlled bolt, 62-Rope drum, 7-Cutter module, 71-Deflection arc strip, 711-Arc-shaped slide bar, 71a-Worm wheel section, 72-Slanted outward extension, 73-Tungsten wire. Detailed Implementation

[0021] Example 1

[0022] like Figure 1-3As shown, a guided, measurable integrated cervical LEEP blade assembly includes a central column 1. A guide probe 11 is located at the front end of the central column 1. The guide probe 11 includes a rotating telescopic column section 111, which is connected to the central column 1 via a screw-in part 112 (e.g., internal and external thread engagement). Rotating the rotating telescopic column section 111 changes its extension length to accommodate different cervical canal depths in different patients. The front end of the guide probe 11 is blunt and rounded to avoid tissue puncture. A support sleeve 12 is fixedly mounted in the middle of the central column 1 for mounting the cutting module 7. An operating sleeve 13 is fixedly mounted at the rear of the central column 1 for the doctor to hold and operate. A vernier sleeve 2 is slidably mounted on the central column 1 between the support sleeve 12 and the operating sleeve 13. A connecting support column 22 is fixedly mounted on the top of the vernier sleeve 2. The connecting support column 22 passes through a column hole in the support sleeve 12 and connects to a support tray 23. A vernier support body 21 is mounted on the support tray 23.

[0023] Specifically, the vernier support 21 includes a pressure strip 211 and a connecting ring 212. The connecting ring 212 is a C-shaped open semi-closed ring that fits around the outside of the central column 1 and is inserted into the support tray 23. The side of the connecting ring 212 has an L-shaped outer arm, and the pressure strip 211 is fixed to the end of the outer arm. The pressure strip 211 is an arc-shaped plate used to contact the cervical os tissue during the procedure. The support tray 23 is a U-shaped cross-section disc with a central hole. Its U-shaped inner diameter is slightly larger than the outer diameter of the connecting ring 212, allowing the connecting ring 212 to be freely inserted into the support tray 23 and to float slightly to adapt to the irregular surface of the cervical os.

[0024] A rotary push assembly 3 is provided between the vernier sleeve 2 and the operating sleeve 13. In this embodiment, the rotary push assembly 3 includes a helical block 31, a sleeve block 32, and a positioning screw 33. The helical block 31 is fixed to the outer surface of the vernier sleeve 2 and has an external thread or a continuous helical groove. The sleeve block 32 is fixed to the outer surface of the operating sleeve 13 and has a smooth through hole inside. The positioning screw 33 passes through the through hole of the sleeve block 32, and its front end has a threaded section that mates with the thread of the helical block 31. When the positioning screw 33 is rotated, the vernier sleeve 2 can be driven to move axially along the central column 1, and it has a self-locking function. The surface of the central column 1 located in front of the operating sleeve 13 has a scale section 14, and the scale section 14 is engraved with depth marks along the axial direction. The front end face of the vernier sleeve 2 is aligned with the scale section 14 to indicate the set cutting depth.

[0025] This embodiment also includes a rope-driven assembly 6. The rope-driven assembly 6 includes a rope-controlled screw 61 and a rope drum 62. The side of the operating sleeve 13 is provided with an upwardly inclined extension seat, and the rope-controlled screw 61 is rotatably installed in the extension seat. The end of the rope-controlled screw 61 (located above the operating sleeve 13) is fixed with the rope drum 62, and a pull rope 4 is wound on the rope drum 62.

[0026] The aforementioned cutter module 7 is a structure dynamically mounted on the support sleeve 12. Specifically, the cutter module 7 includes a deflection arc strip 71, an oblique outward extension 72, and a tungsten wire 73. The deflection arc strip 71 is an arc-shaped strip with its arc center located on the axis of the central column 1, used to maintain a constant tension of the tungsten wire 73 during deflection. The right side of the deflection arc strip 71 (with reference to the usage state) is provided with the oblique outward extension 72. One end of the tungsten wire 73 is fixed to the oblique outward extension 72, which is connected to a power supply module. The other end is fixed to the front of the central column 1, which is also connected to a power supply module. The tungsten wire 73 can perform cutting operations after being energized.

[0027] The deflecting arc strip 71 is slidably connected to the bearing sleeve 12. The front of the bearing sleeve 12 is fixedly provided with an arc-shaped slide bar 711 with the same curvature as the deflecting arc strip 71. An arc-shaped extending limiting groove is provided on the arc-shaped slide bar 711, and a corresponding limiting protrusion is provided on the inner side of the deflecting arc strip 71. The limiting protrusion engages in the limiting groove, thus allowing the deflecting arc strip 71 to slide only along an arc-shaped trajectory. A worm gear section 71a is provided on the rear side of the deflecting arc strip 71. In this embodiment, the worm gear section 71a is a partially arc-shaped worm gear structure, meaning that continuous meshing grooves are only provided within a certain curvature range of the deflecting arc strip 71. L-shaped upward-sloping mounting arms 121 are provided on both sides of the rear of the bearing sleeve 12, and conical grooves are provided on the inner sides of the ends of the two mounting arms 121. The two ends of the rotating shaft 5 are respectively engaged in the conical grooves on both sides, allowing free rotation. The center of the rotating shaft 5 is provided with a worm section 51 that meshes with the worm gear section 71a. The side of the worm section 51 is provided with a rope winding section, and the end of the pull rope 4 is fixed and wound around the rope winding section.

[0028] When the physician rotates the rope-controlled throttle 61, the rope drum 62 winds up the pull rope 4, which in turn drives the actuating shaft 5 to rotate. The actuating shaft 5 drives the worm gear section 71a through the worm shaft 51, causing the deflection arc strip 71 to deflect outward along the arc-shaped slide bar 711, thereby changing the unfolded width of the tungsten wire 73 and the diameter of the resection cone. The above operation only needs to be limited to unidirectional operation to meet the requirements. The entire metal surface of the blade assembly (except for the tungsten wire 73 and necessary conductive contacts) is coated with a polytetrafluoroethylene insulating coating to avoid electrical damage to non-target tissues.

[0029] In practical use, follow these steps: During the preoperative measurement phase, firstly, measure the length of the cervical canal separately using a cervical probe. It is important to emphasize that the cervical probe is a separate cervical measuring instrument with graduations. By holding it by hand and probing the cervical canal before surgery, the length can be accurately determined, which helps the doctor determine the depth of the conization procedure. In the initial positioning phase, the guide probe 11 is pre-installed on the central column 1. Gently insert the guide probe 11 into the cervical canal. Adjust the rotating telescopic column segment 111 according to the cervical canal depth so that the length of the guide probe 11 is slightly less than the cervical canal depth. In the setting the resection depth phase, based on the lesion location and referring to the graduation segment 14 on the central column 1, rotate the positioning plug 33 to push the vernier sleeve 2 to the target depth graduation (e.g., 1.2 cm). The positioning plug 33 remains stationary. Position pre-adjustment stage: The guide probe 11 is inserted along the cervical canal. During this process, the tungsten wire 73 is energized until the pressure strip 211 of the vernier support 21 is in close contact with the external cervical os tissue. At this point, the distance between the front end of the central column 1 and the vernier support 21 is the preset resection depth. Then, the aforementioned rotating shaft 5 is controlled by the rope-controlled rotating bolt 61, causing the deflection arc 71 to gradually deflect outward, and the tungsten wire 73 forms the required conical shape. Electrosurgical resection stage: By starting the LEEP main unit, the tungsten wire 73 is energized. Under the combined action of the directional guidance of the guide probe 11 and the depth limit of the vernier support 21, the tungsten wire 73 rotates at a uniform speed or the handle is pulled up to complete the conical resection. After the resection is completed, the entire blade assembly is withdrawn.

[0030] Example 2

[0031] Based on Example 1, this example further improves the vernier support 21: the side of the pressure strip 211 that contacts the tissue is provided with a medical silicone pad to reduce pressure damage to the external os of the cervix. Meanwhile, the inner wall of the sleeve ring 212 is provided with anti-slip texture to prevent accidental slippage within the support tray 23; the remaining structure is the same as in Example 1.

[0032] Example 3

[0033] This embodiment omits the rope-driven component 6 and instead uses a method of directly manually actuating the aforementioned actuating shaft 5. An operating window is provided on the side of the support sleeve 12, allowing the doctor to directly actuate the end of the actuating shaft 5 with their fingers. This solution has a simpler structure, can also perform bidirectional actuation, and is less expensive, but its operational precision is slightly inferior to the rope-driven solution. The remaining structure is the same as in Embodiment 1.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A guided measurable integrated LEEP knife head assembly for cervical, characterized in that: The device includes a central column, a vernier sleeve, a rotary push assembly, a pull cord, a pivot shaft, a rope-driven assembly, and a cutting module. The top of the central column is equipped with a guide probe, which includes a rotating telescopic column section and a screw-in part. The guide probe is connected to the central column via the screw-in part. A support sleeve is fixedly mounted in the middle of the central column, and the cutting module is installed on the support sleeve. An operating sleeve is fixedly mounted at the rear of the central column, and a rope-driven assembly for controlling the pull cord is installed on the side of the operating sleeve. The vernier sleeve is slidably fitted onto the outside of the central column. A connecting support column is provided at the top of the vernier sleeve, and the support sleeve has a column hole. The connecting support column passes through the column hole and connects to a support tray. The support tray contacts and mounts a vernier support body, which is used to abut against the external os of the cervix to limit the resection depth. A rotary push assembly for remote positioning is provided between the vernier sleeve and the operating sleeve. The central column has a graduated section located in front of the operating sleeve.

2. The guided, measurable integrated cervical LEEP blade assembly according to claim 1, characterized in that: The rope-driven assembly includes a rope-controlled screw and a rope drum. The side of the operating sleeve is provided with an upwardly inclined extension screw seat. The rope-controlled screw is rotatably connected to the extension screw seat. The end of the rope-controlled screw is provided with a rope drum, and a pull rope is fixedly wound around the rope drum. The rope drum is located above the operating sleeve.

3. The guided, measurable, integrated cervical LEEP blade assembly according to claim 1, characterized in that: The vernier support includes a pressure strip and a connecting ring. The connecting ring is a C-shaped open semi-closed ring. The side of the connecting ring is provided with an L-shaped outer support arm, and the outer support arm is provided with a pressure strip.

4. The guided, measurable integrated cervical LEEP blade assembly according to claim 3, characterized in that: The support tray is a U-shaped cross-section disc with a central hole. The support tray is slidably connected to the central column through the central hole. The outer diameter of the connecting ring is smaller than the inner diameter of the U-shape of the support tray.

5. The guided, measurable, integrated cervical LEEP blade assembly according to claim 1, characterized in that: A cutter module is slidably mounted on the front of the bearing sleeve. The cutter module includes a deflecting arc strip, an obliquely outward extension, and a tungsten wire. The obliquely outward extension is located on the right side of the deflecting arc strip. One end of the tungsten wire is connected to the obliquely outward extension, and the other end is connected to the front of the central column. The deflecting arc strip is slidably connected to the bearing sleeve. A worm gear section is provided on the rear side of the deflecting arc strip. A turning shaft is installed on the rear of the bearing sleeve. A worm gear section that meshes with the worm gear section is provided in the middle of the turning shaft.

6. The guided, measurable, integrated cervical LEEP blade assembly according to claim 5, characterized in that: The bearing sleeve is provided with L-shaped upward inclined mounting arms on both sides. The inner side of the end of the mounting arm is provided with a conical groove. The actuating shaft is rotatably clamped between the two mounting arms through the conical groove. The side of the worm gear is provided with a rope winding part. The actuating shaft is driven to the rope actuation component through the rope winding part.

7. A guided, measurable integrated cervical LEEP blade assembly according to claim 6, characterized in that: The worm gear section is a worm-like structure with an incomplete arc segment. The worm gear section includes a continuous and uniform meshing groove provided within the arc segment. The meshing groove is used for contact with the teeth of the worm.

8. A guided, measurable integrated cervical LEEP blade assembly according to claim 5, characterized in that: The front part of the bearing sleeve is fixedly provided with an arc-shaped slide bar that is adapted to the curvature of the deflection arc bar. The arc-shaped slide bar is provided with an arc-shaped extending limiting groove, and the deflection arc bar is provided with an arc-shaped extending corresponding limiting protrusion. The limiting protrusion and the limiting groove cooperate to form an arc-shaped sliding connection relationship.

9. A guided, measurable, integrated cervical LEEP blade assembly according to claim 1, characterized in that: The rotary push assembly includes a spiral block, a sleeve block, and a positioning screw bolt. The spiral block is fixed to the outside of the vernier sleeve, the sleeve block is fixed to the outside of the operating sleeve, and the positioning screw bolt passes through the sleeve block and is screwed into the spiral block. The sleeve block is used for axial limiting connection with the positioning screw bolt.

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