Cerclage wire drag hook scissors
By designing a loop cervical wire with blunt spear pulling hook and scissor structure, the loop cervical wire is solved in the traditional removal method, and the problem of not easy to bend, short handle, inconvenient operation and damage to the tissue is achieved, and the cervical loop cervical wire is quickly and safely removed. , relieve the pain of pregnant women.
Patent Information
- Application Number
- CN202220559909.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2022-03-15
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2032-03-15
AI Technical Summary
Traditional methods of removing the cervical ring cervical cord are difficult, such as soft vaginal tissue, making the cervical cord difficult to be palpable, the handle is short and unreachable, it is inconvenient to operate and can easily damage the cervical and vaginal wall tissues, leading to bleeding.
A ring-necking wire hook and shear is designed, using a blunt spear pulling hook and shear structure, including a blunt spear shape, cutting blades on the inner side of the hook body and serrated cutting area. The multi-collar junction wire is realized through the flare structure and the rear extension guide part. Cut to avoid damage to tissue by sharp edges.
It realizes rapid hooking and breaking the loop cervical thread, which reduces the pain of pregnant women and avoids damage to the cervical and vaginal wall tissues. It is suitable for gynecological removal of the cervical loop cervical thread for transvaginal cervical loop suture surgery.
Smart Images
Figure CN222467041U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a medical device, in particular to a cerclage wire retractor scissors suitable for removing cervical cerclage wires in obstetrics and gynecology, belonging to the technical field of medical devices. Background Art
[0002] Cervical incompetence is also called incomplete closure of the internal cervical os and cervical relaxation. It is caused by congenital cervical development or acquired surgery. The cervix of patients with cervical incompetence contains less fibrous tissue, elastic fibers and smooth muscles, or due to the rupture of the fibrous tissue of the internal cervical os, the ability of the isthmus sphincter is reduced, causing the cervix to expand and relax pathologically. The manifestations of cervical incompetence are mainly premature birth and recurrent miscarriage in the middle and late stages. The incidence of recurrent miscarriage is 8% to 15%.
[0003] The most commonly used treatment method in clinical practice is transvaginal cervical circumferential suture or transabdominal cervical circumferential suture in early pregnancy, which can significantly prolong gestational age, increase the success rate of pregnancy, and improve perinatal outcomes. Transvaginal cerclage requires the cervical cerclage to be removed after 37 weeks of pregnancy to facilitate delivery. Traditionally, there are two ways to remove the cervical cerclage: one is to probe into the vagina without using a vaginal dilator, touch the cervical cerclage, and insert the suture removal scissors to remove it blindly; the other is to use a vaginal dilator to expose the cervical cerclage, lift the reserved thread end with a vascular clamp, and then use ordinary suture removal scissors to pick up and cut the cervical cerclage.
[0004] The traditional method of removing cervical cerclage sutures has the following shortcomings:
[0005] 1. After pregnancy, the vaginal and cervical tissues become soft, and the cervical shape is different from that before pregnancy. In addition, the enlarged uterus and the continuous increase in uterine cavity pressure will cause the cervical cerclage line to sink into the cervical tissue, making it difficult to palpate when removing the suture. Repeated examinations will aggravate the pain of pregnant women.
[0006] 2. The handle of traditional suture removal scissors is too short to reach the cervical cerclage, which is especially difficult for obese pregnant women;
[0007] 3. Due to blind removal or unclear vision in the vagina, after the two handles of the suture remover are opened, although the tip of the scissors is rounded, the blade is sharp, which may cause damage to the surrounding cervical and vaginal wall tissues. Especially when cutting the cervical cerclage, the upper and lower blades bite easily to cut the surrounding cervical and vaginal wall tissues, which may damage blood vessels and cause heavy bleeding in severe cases.
[0008] 4. When the upper and lower blades of traditional stitch-removing scissors are opened and closed, the blades open and close with a large range, requiring a larger operating space, while the vaginal space is small, making operation inconvenient. Summary of the invention
[0009] In view of the problems existing in the above-mentioned prior art, the utility model provides a cerclage wire hook scissors, which is small in size and easy to use. It can avoid the sharp blade from damaging the surrounding cervical and vaginal wall tissues while realizing the rapid hook-off of the cerclage wire and alleviating the pain of pregnant women. It is particularly suitable for the removal of the cervical cerclage wire used in transvaginal cervical ring suture in gynecology.
[0010] In order to achieve the above-mentioned purpose, the cerclage wire retractor shears include a handle part and a retractor shear assembly;
[0011] The hook shear assembly includes a support rod body and a blunt spear hook shear structure located at the front end of the support rod body; the rear end of the support rod body is connected to the handle part; the blunt spear hook shear structure with a smooth surface transition is in the shape of a blunt spear along the axial direction of the support rod body, which is narrow at the front and back and wide in the middle. The blunt spear hook shear structure has a hook body with a hook head bent backwards, and the inner surface of the hook body in a semi-enclosed structure includes a front wedge-shaped part and a rear extension guide part arranged along the front and back directions. A cutting blade is arranged on the inner surface of the hook body along the direction of the inner surface of the hook body, and the cutting edges of the cutting blades are all extended inwardly, the cutting edges of the cutting blades on the front wedge-shaped part are butted together, so that the front wedge-shaped part forms a wedge-shaped cutting area with a wedge tip at the front end, and the cutting edge of the cutting blade on the rear extension guide part includes a protruding arc sawtooth section, so that the rear extension guide part forms a sawtooth cutting area, and the hook door of the hook body is a trumpet-mouth structure with a large outside and a small inside.
[0012] As a further improvement of the present invention, the cutting blade on the rear extending guide portion located at the hook head position further includes a protruding counter-cutting blade segment.
[0013] As a further improvement of the present invention, the cutting blade on the rear extension guide portion facing the hook door of the hook body further comprises an impact blade segment smoothly docked with the circular arc sawtooth segment.
[0014] As a further improvement of the present invention, the minimum gap size W of the hook door of the bell-mouth structure is not greater than 2 times the diameter of the cerclage wire.
[0015] As a further improvement of the present invention, the cross sections of the support rod body and the hook body are both flat structures.
[0016] As a further improvement of the present invention, the handle portion includes a finger ring or a finger hole for easy insertion of fingers for gripping.
[0017] As a further improvement of the present utility model, the finger ring or the finger hole is provided with a finished product-shaped structure.
[0018] As a further improvement of the present invention, the rear end of the support rod body is connected to the handle via a quick disassembly structure.
[0019] Compared with the prior art, the present cerclage wire retractor scissors has a hook body with a hook head bent backwards, and a cutting blade is arranged on the inner surface of the hook body along the direction of the inner surface of the hook body, and the cutting edges of the cutting blade are all extended inwards. Therefore, this outer ring wrapping structure can prevent the sharp cutting edge of the cutting blade from damaging the surrounding cervical and vaginal wall tissues when removing the cervical cerclage wire of transvaginal cervical ring suture surgery; the inner surface of the hook body in a semi-enclosed structure includes a front wedge-shaped part and a rear extended guide part arranged along the front-to-back direction, the front wedge-shaped part forms a wedge-shaped cutting area with a wedge tip at the front end, the extended guide part includes an arc sawtooth segment, and the extended guide part The cerclage wire can also include a reverse cutting blade section and an impact blade section. Therefore, after the double-strand cerclage wire slides into the inner surface of the hook body through the hook door of the trumpet-mouth structure under the action of its elastic contraction force, the double-strand cerclage wire can be cut multiple times by pulling the cerclage wire hook shears backward. In special circumstances, the cerclage wire hook shears are blocked when being pulled out, indicating that the cerclage wire has not been cut. The cerclage wire hook shears can be repeatedly pushed and pulled with a small amplitude, and the double-strand cerclage wire can be repeatedly cut by the cutting blades on the rear extending guide part and the front wedge-shaped part to ensure that the cerclage wire is cut. The cerclage wire is small in size and easy to use, and can quickly hook and break the cerclage wire to relieve the pain of pregnant women. The cerclage wire is particularly suitable for the removal of the cervical cerclage wire for transvaginal cervical ring suture in gynecology. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the utility model;
[0021] Figure 2 It is a structural schematic diagram of the draw hook shear assembly of the utility model;
[0022] Figure 3 yes Figure 2 KK cross-sectional view;
[0023] Figure 4 yes Figure 2 MM cross-sectional view;
[0024] Figure 5 It is a structural schematic diagram of the blunt spear hook shear structure of the utility model;
[0025] Figure 6 It is a structural schematic diagram of the utility model during use.
[0026] In the figure: 1. handle part, 2. hook and shear assembly, 21. support rod body, 22. hook body, 23. cutting blade, 231. arc sawtooth section, 232. reverse cutting blade section, 233. impact blade section, 3. double-strand cerclage wire. DETAILED DESCRIPTION
[0027] The present invention will be further described below in conjunction with the accompanying drawings (the following description is based on the handle portion 1 being located at the rear of the hook shear assembly 2).
[0028] like Figure 1 As shown, the cerclage wire hook shears include a handle portion 1 and a hook shear assembly 2.
[0029] like Figure 2 As shown, the hook shear assembly 2 includes a support rod body 21 and a blunt spear hook shear structure located at the front end of the support rod body 21; the rear end of the support rod body 21 is connected to the handle portion 1; the blunt spear hook shear structure with a smooth surface transition is in the shape of a blunt spear along the axial direction of the support rod body 21, which is narrow in front and back and wide in the middle. The blunt spear hook shear structure has a hook body 22 with a hook head bent backwards, and the inner surface of the hook body 22 in a semi-enclosed structure includes a front wedge-shaped portion and a rear extended guide portion arranged along the front and back directions, and a hook body 22 is provided on the inner surface of the hook body 2 2, and the cutting blades 23 are arranged in the inner surface direction, and the cutting edges of the cutting blades 23 are all extended in the inner direction, the cutting edges of the cutting blades 23 on the front wedge-shaped part are butted, so that the front wedge-shaped part forms a wedge-shaped cutting area with a wedge tip at the front end, and the cutting edges of the cutting blades 23 on the rear extension guide part include a protruding arc sawtooth section 231, so that the rear extension guide part forms a sawtooth cutting area, and the hook gate of the hook body 22 is a trumpet-shaped structure with a large outer side and a small inner side on the inner surface of the hook body 22 that facilitates the cervical cerclage line to enter the semi-enclosed structure.
[0030] When using the present cerclage hook shears to remove the cervical cerclage of transvaginal cervical ring suture, the physician can slowly insert the hook shear assembly 2 into the vagina with the help of the endoscope hand-held handle portion 1, adjust the angle to make the blunt spear hook shear structure close to the cervical wall, and continue to insert it until it is inserted between the double-strand cerclage wire 3 exposed on the cervical surface and the cervical wall, and continue to insert it after rotating it at an appropriate angle along the central axis of the support rod body 21. Figure 6 As shown, when the hook door of the hook body 22 reaches the position of the double-strand cerclage wire 3, the double-strand cerclage wire 3 slides into the serrated cutting area on the inner surface of the hook body 22 through the hook door of the trumpet structure under the action of its elastic contraction force. At this time, the cerclage wire hook shears are pulled backwards to achieve the cutting of the double-strand cerclage wire 3 by the cutting blade 23 with the arc serrated section 231 on the rear extended guide part. If the double-strand cerclage wire 3 is not completely cut off at this time, the cerclage wire hook shears can be pulled backwards continuously to make the double-strand cerclage wire 3 enter the wedge-shaped cutting area, so that the double-strand cerclage wire 3 can be cut by the cutting blade 23 on the front wedge-shaped part. In special cases, if the cerclage wire hook shears is blocked when being pulled out, it means that the cerclage wire is not cut off. The cerclage wire hook shears can be pushed and pulled repeatedly with a small amplitude, and the double-strand cerclage wire 3 can be repeatedly cut by the cutting blades 23 on the rear extended guide part and the front wedge-shaped part to ensure that the cerclage wire is cut off.
[0031] In order to achieve a better cutting and breaking effect, as a further improvement scheme of the utility model, Figure 5As shown, the cutting blade 23 on the rear extension guide portion located at the hook head position also includes a protruding counter-cutting blade section 232. When the double-strand cerclage wire 3 slides through the hook door of the trumpet-mouth structure to the inner surface of the hook body 22, the counter-cutting blade section 232 can cut the surface of the double-strand cerclage wire 3 in the opposite direction of its elastic contraction.
[0032] In order to achieve a better cutting and breaking effect, as a further improvement scheme of the utility model, Figure 5 As shown, the cutting blade 23 on the rear extension guide portion facing the hook door position of the hook body 22 also includes an impact blade segment 233 smoothly docked with the arc serrated segment 231. When the double-strand cerclage wire 3 slides into the inner surface of the hook body 22 through the hook door of the bell-mouth structure under the action of its elastic contraction force, the elastic contraction force can make the double-strand cerclage wire 3 quickly impact on the impact blade segment 233, so that the impact blade segment 233 cuts the surface of the double-strand cerclage wire 3 relative to its elastic contraction direction.
[0033] In order to achieve a better cutting effect, as a further improvement scheme of the utility model, Figure 5 As shown, the minimum gap size W of the hook gate of the trumpet-mouth structure is not greater than 2 times the diameter of the cerclage wire. With this arrangement, the double-strand cerclage wire 3 can be squeezed and twisted into a side-by-side structure during the process of sliding through the hook gate of the trumpet-mouth structure to the inner surface of the hook body 22 under the action of its elastic contraction force, thereby facilitating subsequent cutting and avoiding the situation where the two strands of the double-strand cerclage wire 3 in a stacked state cannot contact the cutting blade 23 at the same time.
[0034] In order to facilitate inserting the blunt spear hook scissors structure between the double-strand cerclage wire 3 exposed on the cervical surface and the cervical wall, as a further improvement of the utility model, Figure 3 , Figure 4 As shown, the cross sections of the support rod body 21 and the hook body 22 are both flat structures.
[0035] In order to facilitate the control of the cerclage wire hook shear, as a further improvement of the utility model, Figure 1 As shown, the handle portion 1 includes a finger ring or finger hole for easy insertion of fingers for gripping. To achieve a more stable grip, the finger ring or finger hole can be provided with a finished product shaped structure, so as to accurately operate the position and angle of the retractor shear assembly and improve the precision of the operation.
[0036] In order to reduce medical costs, as a further improvement scheme of the utility model, the rear end of the support rod body 21 is connected to the handle 1 through a quick disassembly structure, and the entire blunt spear retractor scissors structure can be used as a disposable consumable, and the handle part 1 can be reused, which can reduce medical costs while avoiding cross infection.
Claims
1. A cerclage wire hook scissors, characterized in that: It comprises a handle portion (1) and a draw hook shear assembly (2); The hook shear assembly (2) comprises a support rod body (21) and a blunt spear hook shear structure located at the front end of the support rod body (21); the rear end of the support rod body (21) is connected to the handle portion (1); the blunt spear hook shear structure with a smooth surface transition has an overall shape along the axial direction of the support rod body (21) that is narrow in front and back and wide in the middle; the blunt spear hook shear structure has a hook body (22) with a hook head bent backwards; the inner surface of the hook body (22) in a semi-enclosed structure comprises a front wedge-shaped portion and a rear extending guide portion arranged along the front and back directions; the hook body (22) ) is provided on the inner surface of the hook body (22) along the inner surface direction, and the cutting edges of the cutting blades (23) are all extended inwardly, the cutting edges of the cutting blades (23) on the front wedge-shaped part are butted, so that the front wedge-shaped part forms a wedge-shaped cutting area with a wedge tip at the front end, and the cutting edges of the cutting blades (23) on the rear extension guide part include a protruding arc sawtooth section (231), so that the rear extension guide part forms a sawtooth cutting area, and the hook door of the hook body (22) is a trumpet-shaped structure with a large outer side and a small inner side.
2. The cerclage wire hook scissors according to claim 1, characterized in that: The cutting blade (23) on the rear extended guide portion at the hook head position further comprises a protruding counter-cutting blade section (232).
3. The cerclage wire hook scissors according to claim 1, characterized in that: The cutting blade (23) on the rear extension guide portion facing the hook door position of the hook body (22) further comprises an impact blade segment (233) smoothly butted against the circular arc sawtooth segment (231).
4. The cerclage wire hook scissors according to claim 1, 2 or 3, characterized in that: The minimum gap size W of the hook door of the bell-mouth structure is not greater than 2 times the diameter of the cerclage wire.
5. The cerclage wire hook scissors according to claim 1, 2 or 3, characterized in that: The cross sections of the support rod body (21) and the hook body (22) are both flat structures.
6. The cerclage wire hook scissors according to claim 1, 2 or 3, characterized in that: The grip portion (1) comprises a finger ring or finger hole for easy insertion of fingers for gripping.
7. The cerclage wire hook scissors according to claim 6, characterized in that: Finger rings or finger holes are provided with a finished font structure.
8. The cerclage wire hook scissors according to claim 1, 2 or 3, characterized in that: The rear end of the support rod body (21) is connected to the handle portion (1) via a quick disassembly structure.