Cervical conization knife

Abstract

The utility model relates to a cervical conization knife, and belongs to the field of gynecological operation instruments. Comprising a knife handle and a detachable blade. And the front end 2 of the knife handle tilts and forms an angle with the longitudinal axis of the handheld end 1 of the knife handle. According to different angles between the longitudinal axis of the front end 2 of the scalpel handle and the longitudinal axis of the handheld end 1 of the scalpel handle, the scalpel is divided into three models of A, B and C which are respectively at angles of 27 degrees, 31 degrees and 37 degrees. The cross section of the blade body is arc-shaped, the radian is consistent with that of the cervix uteri, the arc length is 1 / 8 of the circumference of the cervix uteri, namely 1cm, the two sides of the blade are both blade faces 3, the front ends of the blade faces 3 converge to enable the blade tip 4 to be an arc-shaped triangle, the rear end 5 of the blade is a parallel blunt face, and the longitudinal axis of the blade is provided with scales 6. Compared with a traditional cold knife, the novel cervical cold knife can be applied to gynecology cervical cold knife conization, surgical operation is facilitated, a cut cone can be regular, cervical injury is reduced, and the shape and the function of the cervix are reserved to the maximum extent.

Description

Technical Field

[0001] The utility model relates to a scalpel which is suitable for gynecological cervical cold knife conization and belongs to the field of gynecological surgical instruments. Background Art

[0002] Cervical cancer is the fourth most common cancer among women worldwide, posing a serious threat to women's health. Cervical squamous intraepithelial lesions (SILs) are a group of cervical lesions closely associated with cervical cancer and commonly occur in women aged 25-35. Persistent infection with high-risk human papillomavirus (HPV) is the primary cause of both cervical cancer and SILs. HPV is primarily transmitted through sexual intercourse. With increasing sexual openness and widespread cervical cancer screening, an increasing number of young women are developing SILs and require cervical conization, a procedure involving the removal of a portion of the cervical tissue. Cervical conization disrupts the original cervical structure, leading to cervical insufficiency, which can further contribute to late miscarriage and premature birth. Cervical insufficiency occurs in 0.1% to 0.2% of women, and approximately 15% of recurrent miscarriages between 16 and 28 weeks of gestation are caused by SILs. A significant proportion of women undergoing cervical conization for cervical lesions are either nulliparous or still seeking fertility, and therefore seek to preserve cervical function as much as possible. The traditional cold knife has a flat structure. The operating space is small and the operation is difficult during cone resection of the cervix. The angle and depth are difficult to control, resulting in an incision that is too small or too large, an irregular incision, excessive bleeding, and difficulty in suturing. Cervical adhesions and cervical insufficiency are likely to occur after the operation. Utility Model Content

[0003] In order to overcome the defects of the existing technology such as small operating space, difficult operation, difficult to grasp angles and depths, difficult to control the actual resection range, difficult suturing, and large damage, the utility model provides a cervical cone cutting knife, which facilitates surgical operation, regularly removes the cervix, reduces secondary damage, and preserves the cervical shape and function to the greatest extent.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: a cervical conization knife, comprising a handle and a detachable blade, wherein the front end of the handle is tilted and forms an angle with the longitudinal axis of the handle handheld end; the scalpel is divided into three models: A, B, and C, according to the different angles between the longitudinal axis of the front end of the handle and the longitudinal axis of the handle handheld end, with angles of 27°, 31°, and 37°, respectively; the cross-section of the blade body is arc-shaped, the arc being consistent with the cervix, and the arc length being 1 / 8 of the cervical circumference, i.e., 1 cm. Both sides of the blade are edged, the tip is an arc-shaped triangle, the rear of the blade is a parallel blunt surface, and the longitudinal axis of the blade is graduated.

[0005] Theoretical basis: The vagina is a tube that is wide at the top and narrow at the bottom, with a front wall length of 7-9 cm and a back wall length of 10-12 cm. The cervix of an adult woman is about 2.5-3 cm long. The cervix is divided into two parts, the upper part occupies 2 / 3 of the cervix, and the lower part occupies 1 / 3 of the cervix, which extends into the vagina and is called the cervicovaginal part. The cervix is about 2.5 cm thick, and cervical hypertrophy is greater than 3 cm. According to the "2022 NCCN Clinical Practice Guidelines for Cervical Cancer (1st Edition)", the cone cutting width is 3 mm outside the lesion, and the cone cutting length is 10-20 mm according to the CIN grade and the type of transformation zone. Professor Qian Deying, a colposcopy expert in my country, believes that the excision depth should be 15-25 mm.

[0006] If the cone is used to resect a lesion 1 cm high and 2 cm wide, the bending angle is 45°;

[0007] If the cone is used to resect a lesion 1 cm high and 3 cm wide, the bending angle is 56.31°;

[0008] If the cone is used to resect a lesion 2 cm high and 1 cm wide, the bending angle is 14.036°;

[0009] If a lesion 2 cm high and 2 cm wide is removed by cone resection, the bending angle is 26.565°;

[0010] If the cone is used to resect a lesion 2 cm high and 3 cm wide, the bending angle is 36.87°;

[0011] If the cone is used to resect a lesion 2.5 cm high and 1 cm wide, the bending angle is 11.31°;

[0012] If the cone is used to resect a lesion 2.5 cm high and 2 cm wide, the bending angle is 21.801°;

[0013] If the cone is used to resect a lesion 2.5 cm high and 3 cm wide, the bending angle is 30.564°;

[0014] According to clinical experience, the following three angles were selected: cone height 2cm, width 2cm; cone height 2.5cm, width 3cm; cone height 2cm, width 3cm. The rounded angles were 27°, 31°, and 37°, which were designated as models A, B, and C respectively.

[0015] The arc length of the blade is 1 / 8 of the cervical circumference. If the cervical diameter is 2.5 cm, the arc length is about 1 cm. The tip of the blade is triangular.

[0016] The beneficial effects of the present invention are as follows: when performing surgical operations, the knife handle with a suitable angle can be selected individually, which overcomes the problem of narrow female vaginal space and facilitates surgical operations. The curved knife head fits the shape of the cervix better, can regularly remove the cone, reduce cervical damage, facilitate suturing, reduce intraoperative bleeding and the risk of postoperative cervical adhesions, cervical insufficiency, etc. The scale of the blade is conducive to controlling the cone cutting depth, avoiding excessive or insufficient removal, and retaining the cervical shape and function to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the knife handle of the utility model, which is divided into three different models: A, B, and C;

[0019] In the figure, 1 is the hand-held end of the handle, 2 is the front end of the handle;

[0020] Figure 2 This is a schematic structural diagram of a blade of the present invention;

[0021] In the figure, 3, blade surface, 4, tip, 5, blunt side, 6, scale;

[0022] Figure 3 This is a schematic diagram of the overall structure of the handle and blade of the utility model;

[0023] In the picture, 1 is the hand-held end of the handle, 2 is the front end of the handle, 3 is the blade surface, 4 is the tip of the knife, 5 is the blunt side, and 6 is the scale. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] The utility model describes a cervical cone cutting knife, comprising: a handle and a detachable blade. The front end 2 of the handle is tilted and forms an angle with the longitudinal axis of the handheld end 1 of the handle. According to the different angles between the longitudinal axis of the front end 2 of the handle and the longitudinal axis of the handheld end 1 of the handle, the scalpel is divided into three models: A, B, and C, which are at angles of 27°, 31°, and 37°, respectively. The cross-section of the blade body is arc-shaped, the arc is consistent with the cervix, and the arc length is 1 / 8 of the circumference of the cervix, that is, 1 cm. Both sides of the blade are blade surfaces 3, and the front ends of the blade surfaces 3 converge so that the tip 4 is an arc-shaped triangle. The rear end 5 of the blade is a parallel blunt surface, and the longitudinal axis of the blade has a scale 6. When performing the surgical operation, the handle and blade of appropriate angles are assembled, and the cervix is rotated to remove the cervix. The scale on the blade can roughly estimate the cone cutting height.

[0026] This utility model can be used for gynecological cervical conization. Compared with traditional cold knives, the handle angle is adjusted, and the appropriate handle angle can be individually selected based on the scope of the lesion, the type of transformation zone, and the surgeon's rich experience. This overcomes the problem of narrow vaginal space in women, and eliminates the need for vaginal retractors to forcefully expand the vagina to expose the surgical field. The curved blade better fits the shape of the cervix, allowing for regular excision of the cone, minimizing cervical damage, facilitating suturing, and reducing the risks of intraoperative bleeding and postoperative cervical adhesions and cervical insufficiency. The blade scale facilitates control of the cone depth, avoiding excessive or insufficient excision, and preserving the cervical morphology and function to the greatest extent possible.

Claims

1. A cervical conization knife, characterized by : comprising: a handle and a detachable blade; the front end of the handle (2) is tilted and forms an angle with the longitudinal axis of the handle hand-held end (1); according to the different angles between the longitudinal axis of the front end of the handle (2) and the longitudinal axis of the handle hand-held end (1), the scalpel is divided into three types: A, B, and C, which are 27°, 31°, and 37° respectively; the cross section of the blade body is arc-shaped, the arc is consistent with the cervix, and the arc length is 1 / 8 of the circumference of the cervix, that is, 1 cm; both sides of the blade are blade surfaces (3), the front ends of the blade surfaces (3) converge, so that the tip (4) is an arc-shaped triangle, the rear end of the blade (5) is a parallel blunt surface, and the longitudinal axis of the blade is marked with a scale (6).

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