T-shaped external fixator for intrauterine device

Abstract

The utility model relates to the technical field of intrauterine devices, in particular to a T-shaped intrauterine device external hanging fixator which comprises a fixing portion and an installation portion, the fixing portion comprises a fixing cylinder and a fixing plate arranged at the top of the fixing cylinder, two through hanging holes are oppositely formed in the side wall of the fixing cylinder, and a fixing rod is arranged at the position, corresponding to the axis of the fixing cylinder, of the top of the fixing plate. The fixing rod is spiral; the mounting part comprises a mounting cylinder coaxially and movably arranged on the fixing cylinder in a sleeving mode, the top of the mounting cylinder abuts against the bottom of the fixing plate, and a limiting piece is arranged between the mounting cylinder and the fixing cylinder and used for limiting relative rotation of the mounting cylinder and the fixing cylinder. By adopting the technical scheme provided by the utility model, the technical problem that the expected contraception and treatment effects cannot be achieved due to the fact that the contraception device is easy to move downwards in the uterus and even prolapse from the uterus after the contraception device is put in the uterus in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of contraceptive devices, in particular to an external fixing device for a T-shaped contraceptive device. Background Art

[0002] An intrauterine device, or IUD for short, is a contraceptive device placed inside the uterus. Depending on whether it contains medication or not, IUDs are divided into inert IUDs and active IUDs. Among them, active IUDs include two basic types: copper-releasing IUDs and progestin-releasing IUDs. Currently, a more commonly used progestin-releasing IUD is the levonorgestrel intrauterine system, which includes an IUD and an inserter. The overall shape of the IUD is T-shaped, as shown in the attached Figure 1 As shown, the contraceptive device 1 comprises a ring body 11 , the top end of the ring body 11 is symmetrically connected to two ring arms 12 , and the bottom end of the ring body 11 is connected to a tail wire 13 .

[0003] When in use, the contraceptive device is placed in the uterus through the placement device, which specifically includes the following steps: (1) Use a speculum to expose the cervix, and thoroughly clean the cervix and vagina with an appropriate disinfectant; (2) Use a cervical clamp to clamp the upper lip of the cervix and straighten the cervical opening. During the entire placement process, the cervical clamp should always keep the cervical opening lightly clamped to relieve the thrust during the placement process; (3) Insert the uterine probe into the vagina and gently move the uterine probe inward to determine the direction of the cervical opening and the depth of the uterine cavity; (4) Take out the placement device from the sterile packaging bag. At this time, the contraceptive device is loaded on the end of the placement device. The end of the placement device is inserted into the uterus through the cervical opening to send the contraceptive device into the uterus, and then the placement device is released in the uterus; (5) The end of the placement device is removed from the uterus. At this time, the tail thread hangs from the uterus into the vagina. The tail thread is cut short to leave about 2 cm outside the cervix.

[0004] In addition to the contraceptive effect of ordinary contraceptive devices, the levonorgestrel intrauterine system also has a therapeutic effect, mainly through the continuous and slow release of levonorgestrel in the uterine cavity to achieve the effect of treating adenomyosis. Adenomyosis is a common disease in women of childbearing age, with the main symptoms being increased menstrual flow, uterine enlargement, and dysmenorrhea. Since adenomyosis causes increased menstrual flow and uterine enlargement, it often causes the IUD to move down in the uterus or even fall out of the uterus after placement. Not only does it fail to achieve the expected contraceptive and therapeutic effects, but re-placement of the IUD will also increase the patient's pain and financial burden.

[0005] Therefore, there is an urgent need for a T-shaped contraceptive device external fixer for fixing the T-shaped contraceptive device in the uterine cavity to prevent the contraceptive device from moving downward in the uterus or even falling out of the uterus, thereby ensuring the contraceptive and therapeutic effects. Utility Model Content

[0006] The utility model aims to provide a T-shaped contraceptive device external fixing device to solve the technical problem that after the contraceptive device is placed in the uterus, the contraceptive device is easily moved down in the uterus or even falls out of the uterus, and the expected contraceptive and therapeutic effects cannot be achieved.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The T-shaped IUD external fixer comprises a fixing part and a mounting part, wherein the fixing part comprises a fixing cylinder and a fixing plate arranged on the top of the fixing cylinder, two penetrating hanging holes are relatively opened on the side wall of the fixing cylinder, a fixing rod is arranged at the top of the fixing plate corresponding to the axial position of the fixing cylinder, and the fixing rod is spiral; the mounting part comprises a mounting cylinder coaxially movably sleeved on the fixing cylinder, the top of the mounting cylinder is abutted against the bottom of the fixing plate, a limiting member is arranged between the mounting cylinder and the fixing cylinder, and the limiting member is used to limit the relative rotation of the mounting cylinder and the fixing cylinder.

[0009] The principle and beneficial effects of this program:

[0010] In actual application, the fixing tube is inserted into the mounting tube from the top of the mounting tube, so that the top of the mounting tube is against the bottom of the fixing plate, and the relative rotation of the fixing tube and the limiting tube is limited by the limiting piece, so as to realize the connection of the fixing part at the top of the mounting tube; the fixing part is placed into the uterus through the mounting tube until the top of the fixing rod is against the uterine wall, the mounting tube is rotated, and the fixing part is driven to rotate synchronously under the limiting action of the limiting piece, so that the spiral fixing rod is screwed into the uterine wall, so as to realize the fixed connection between the fixing part and the uterine wall, at which time the two hanging holes are relative to the positions of the fallopian tubes on both sides of the uterus; then the placement device is used to send the contraceptive device into the fixing tube through the mounting tube, and the two ring arms of the contraceptive device are kept horizontal, so that the two ring arms of the contraceptive device are relative to the positions of the two hanging holes; the mounting tube is moved outward so that the hanging hole is not blocked by the mounting tube, and the contraceptive device is released in the fixing tube by the placement device, and the two ring arms of the contraceptive device extend from the hanging holes at the corresponding positions, and finally the mounting tube and the placement device are taken out together, so as to complete the installation and fixation of the contraceptive device.

[0011] This solution achieves fixation of the relative position of the fixing part and the uterine wall by screwing the spiral fixing rod into the uterine wall, and then releases the contraceptive device in the fixing tube through the placement device, so that the two ring arms of the contraceptive device are suspended on the two hanging holes of the fixing part, thereby fixing the relative position of the contraceptive device and the fixing part. This achieves fixation of the relative position of the contraceptive device with respect to the uterine wall, and can effectively avoid the problem of the contraceptive device moving downward in the uterus or even falling out of the uterus. Not only can the expected contraceptive and therapeutic effects be achieved, but also the pain and economic burden of patients caused by re-placing the contraceptive device can be avoided.

[0012] In this solution, after the fixing part is fixed on the uterine wall by rotating the installation tube, the connection between the installation tube and the fixing part is maintained, and the IUD is sent into the fixing tube through the installation tube using the placement device. The installation tube can guide the movement of the IUD during the movement of the IUD into the fixing tube. Compared with the method of removing the installation tube immediately after the fixing part is fixed, the time for aligning the placement device with the fixing tube can be reduced, which is not only beneficial to improving the overall operating efficiency, but also beneficial to ensuring the accuracy of the placement position of the IUD, avoiding the IUD from being released outside the fixing tube, thereby ensuring that the IUD is effectively fixed.

[0013] Preferably, as an improvement, the limit member includes a limit block and a matching block, a plurality of limit blocks are circumferentially provided on the outer wall of the fixed cylinder, a corresponding number of matching blocks are circumferentially provided on the inner wall of the mounting cylinder, and the matching block is axially slidably connected between two adjacent limit blocks.

[0014] Beneficial effect: This solution aligns the bottom of the fixed tube with the top of the installation tube, and makes the matching block correspond to the gap between the two adjacent limit blocks, and then inserts the fixed tube into the installation tube from the top of the installation tube along the axial direction. During this process, the matching block slides axially between the two adjacent limit blocks until the top of the installation tube abuts against the bottom of the fixed plate. At this time, the matching block is located between the two adjacent limit blocks. Through the cooperation between the matching block and the limit block, the relative rotation restriction between the installation tube and the fixed tube is realized, so that the installation tube drives the fixed tube to rotate, and the spiral fixing rod is screwed into the uterine wall for fixing. This solution has a simple structure and can effectively fix the position of the fixing part on the uterine wall through the installation tube.

[0015] Preferably, as an improvement, the limit member includes a limit block and a limit groove, a plurality of limit blocks are provided on the outer wall of the fixed cylinder along the circumferential direction, and a limit groove is provided on the inner wall of the mounting cylinder along the axial direction at the position of the limit block, the limit groove passes through the top of the mounting cylinder, and the limit block is slidably connected in the limit groove.

[0016] Beneficial effect: This solution aligns the bottom of the fixed tube with the top of the installation tube, and makes the position of the limiting groove and the limiting block relative to each other, and then inserts the fixed tube into the installation tube from the top of the installation tube along the axial direction. During this process, the limiting block is axially slidably connected in the limiting groove at the corresponding position until the top of the installation tube abuts against the bottom of the fixed plate. Since the limiting groove runs through the top of the installation tube, the limiting block is still located in the limiting groove at this time. Through the cooperation of the limiting block and the limiting groove, the relative rotation restriction between the fixed tube and the installation tube is realized, so that the installation tube drives the fixed tube to rotate, and the spiral fixing rod is screwed into the uterine wall for fixing. This solution has a simple structure and can effectively realize the position fixation of the fixing part on the uterine wall through the installation tube.

[0017] Preferably, as an improvement, a pulling wire is provided at the bottom of the fixing tube, and the pulling wire is used to pull the fixing tube.

[0018] Beneficial effect: In this scheme, a pulling line is arranged at the bottom of the fixing tube. When the contraceptive device reaches the service life, the fixing part is taken out of the uterus by pulling the pulling line outward, thereby taking out the contraceptive device suspended on the fixing part together. Compared with the method of directly pulling out the tail thread of the contraceptive device to take out the contraceptive device connected to the fixing part together, it can avoid the problem that only outward pulling force is applied to the contraceptive device, causing the contraceptive device to slip out of the fixing tube, thereby causing the fixing part to not be taken out together.

[0019] Preferably, as an improvement, a position mark is provided on the outer wall of the installation tube close to the bottom, and the position mark is used to indicate the position status of the two hanging holes.

[0020] Beneficial effects: In this scheme, a position mark is set on the outer wall of the installation tube near the bottom. When the position mark is in a certain position, for example, when the installation tube is in a horizontal position and the position mark is located at the top of the installation tube along the radial direction, it indicates that the two hanging holes are relative to the positions of the fallopian tubes on both sides of the uterus. In this way, after the fixing part is fixed on the uterine wall by rotating the installation tube, the position status of the two hanging holes can be judged conveniently and accurately to ensure that when the contraceptive device is released in the fixing tube, the two ring arms of the contraceptive device can be smoothly extended from the two hanging holes, and the two ring arms are relative to the positions of the fallopian tubes on both sides of the uterus, ensuring the smooth release and fixation of the contraceptive device, thereby ensuring the contraceptive and therapeutic effects.

[0021] Preferably, as an improvement, a conical positioning block is provided at the bottom of the fixing plate, the size of the positioning block gradually decreases from top to bottom, and the positioning block is coaxially arranged with the fixing cylinder.

[0022] Beneficial effect: In this scheme, an inverted cone-shaped positioning block is arranged at the bottom of the fixed plate, and the positioning block is arranged coaxially with the fixed cylinder. When the IUD is released in the fixed cylinder, the inverted cone-shaped positioning block can be offset against the top center position of the IUD, thereby realizing the center positioning of the IUD in the fixed cylinder, ensuring that the two ring arms of the IUD can effectively extend out of the hanging holes at the corresponding positions, thereby realizing the effective suspension and fixation of the IUD.

[0023] Preferably, as an improvement, the fixing plate is coaxially arranged with the fixing tube, the outer diameter of the fixing plate is larger than the outer diameter of the fixing tube, and the outer diameter of the fixing plate is less than or equal to the outer diameter of the mounting tube.

[0024] Beneficial effects: The restrictions on the position and size of the fixing plate in this solution can ensure that the bottom of the fixing plate is against the top of the mounting tube, thereby realizing axial limitation of the mounting tube and the fixing tube, and avoiding the problem that the fixing part slides toward the mounting tube along the axial transition during the process of placing the fixing part into the uterus through the mounting tube, causing the fixing rod to be located inside the mounting tube and the fixed connection between the fixing part and the uterine wall to be unable to be achieved; it can also avoid the problem that the size of the fixing plate is too large and exceeds the outer diameter of the mounting tube, resulting in the fixing plate being too large to cause movement obstruction during the process of sending the fixing part into the uterus through the mounting tube.

[0025] Preferably, as an improvement, a vertical connecting section is provided at the top of the fixing rod, the connecting section is coaxially arranged with the fixing tube, and the top of the connecting section is conical.

[0026] Beneficial effect: This scheme adds a connecting section with a conical top at the top of the fixing rod. Before the fixing rod is screwed into the uterine wall, the connecting section can be inserted into the uterine wall first to achieve a preliminary connection between the fixing rod and the uterine wall, avoiding displacement of the fixing rod during the process of rotating and inserting it into the uterine wall, thereby helping to reduce damage to the connection between the uterine wall and the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a prior art contraceptive device.

[0028] Figure 2 This is a schematic diagram of the structure of the fixing part in Example 1 of the utility model.

[0029] Figure 3 for Figure 2 Schematic diagram of the internal structure of the fixed cylinder.

[0030] Figure 4 This is a schematic diagram of the structure of the installation part in Example 1 of the utility model.

[0031] Figure 5 It is a top view of the connection between the fixing part and the mounting part in Example 1 of the utility model.

[0032] Figure 6 It is a top view of the connection between the fixing part and the mounting part in Example 2 of the utility model.

[0033] Figure 7 This is a schematic diagram of the structure of the fixing part in Example 3 of the utility model. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The figure marks in the drawings of the specification include: contraceptive device 1, ring body 11, ring arm 12, tail wire 13, fixing part 2, fixing cylinder 21, fixing plate 22, hanging hole 23, fixing rod 24, limiting block 25, pulling line 26, positioning block 27, connecting section 28, mounting part 3, mounting cylinder 31, matching block 32, position mark 33, limiting groove 34.

[0036] Example 1

[0037] T-shaped IUD external fixator, including Figure 2 The fixing part 2 shown and Figure 4 The mounting portion 3 shown, the fixing portion 2 includes a fixing tube 21 and a fixing plate 22 coaxially fixedly connected to the top of the fixing tube 21, and two penetrating hanging holes 23 are opened on the side wall of the fixing tube 21, and the two hanging holes 23 are symmetrically arranged relative to the axis of the fixing tube 21. A fixing rod 24 is fixedly connected to the top of the fixing plate 22 corresponding to the axis position of the fixing tube 21, and the fixing rod 24 is spiral, and the spiral center point of the fixing rod 24 is located on the axis of the fixing tube 21.

[0038] The mounting portion 3 includes a mounting tube 31, which is coaxially slidably sleeved on the fixed tube 21, and the top of the mounting tube 31 abuts against the bottom of the fixed plate 22. A stopper is provided between the mounting tube 31 and the fixed tube 21, and the stopper is used to limit the relative rotation of the mounting tube 31 and the fixed tube 21. Specifically, the stopper includes: Figure 5 The limit blocks 25 and matching blocks 32 shown in the figure have a plurality of limit blocks 25 fixedly connected to the outer wall of the fixed cylinder 21 along the circumferential direction, and the plurality of limit blocks 25 are evenly distributed along the circumference of the fixed cylinder 21; the inner wall of the mounting cylinder 31 has the same number of matching blocks 32 as the limit blocks 25 fixedly connected to the inner wall of the mounting cylinder 31 along the circumferential direction, and the plurality of matching blocks 32 are evenly distributed along the circumference of the mounting cylinder 31; the matching blocks 32 are axially slidably connected between two adjacent limit blocks 25.

[0039] A pulling wire 26 is fixedly connected to the bottom of the fixed cylinder 21, and the pulling wire 26 is used to pull the fixed cylinder 21. In this embodiment, there are two pulling wires 26, and the two pulling wires 26 are symmetrically arranged relative to the axis of the fixed cylinder 21. By pulling the fixed cylinder 21 with the two symmetrically arranged pulling wires 26, the fixed cylinder 21 can be moved axially, making it easier to pull the fixed rod 24 out of the uterine wall, so that the fixed part 2 together with the IUD 1 therein can be taken out of the uterus.

[0040] Combination Figure 3As shown, the bottom of the fixing plate 22 is coaxially fixedly connected with a conical positioning block 27, and the size of the positioning block 27 gradually decreases from top to bottom. The outer diameter of the fixing plate 22 is greater than the outer diameter of the fixing tube 21, and the outer diameter of the fixing plate 22 is less than or equal to the outer diameter of the mounting tube 31. In this embodiment, the outer diameter of the fixing plate 22 is equal to the outer diameter of the mounting tube 31. When the fixing rod 24 is screwed into the uterine wall by rotating the mounting tube 31, the fixing plate 22 and the mounting tube 31 are restrained against each other to prevent the fixing part 2 from sliding into the mounting tube 31 as a whole, thereby ensuring that the fixing part 2 is smoothly fixed to the uterine wall.

[0041] The outer wall of the installation tube 31 near the bottom is provided with Figure 4 The position mark 33 shown in the figure is set on the mounting tube 31 by pasting or etching. The position mark 33 is used to indicate the position status of the two hanging holes 23. Specifically, when the mounting tube 31 is in a horizontal position and the position mark 33 is located at the top of the mounting tube 31 along the radial direction, it indicates that the two hanging holes 23 are relative to the fallopian tubes on both sides of the uterus.

[0042] The specific implementation process is as follows:

[0043] (1) Assembling the fixing portion 2 and the mounting portion 3: Align the bottom of the fixing tube 21 with the top of the mounting tube 31 so that the matching block 32 corresponds to the gap between the two adjacent limit blocks 25, and then axially insert the fixing tube 21 into the mounting tube 31 from the top. During this process, the matching block 32 slides axially between the two adjacent limit blocks 25 until the top of the mounting tube 31 abuts against the bottom of the fixing plate 22. At this time, the matching block 32 is located between the two adjacent limit blocks 25, and the assembly of the fixing portion 2 and the mounting portion 3 is completed.

[0044] (2) Insert and connect the fixing part 2: insert the fixing part 2 into the uterus through the installation tube 31 until the top of the fixing rod 24 abuts against the uterine wall, continue to move the installation tube 31 inward along the axis, and rotate the installation tube 31. Through the limit cooperation between the matching block 32 and the limit block 25, the fixing tube 21 is driven to rotate synchronously, thereby driving the fixing rod 24 to rotate synchronously, and screwing the fixing rod 24 into the uterine wall to achieve a fixed connection between the fixing part 2 and the uterine wall; when the rotation of the installation tube 31 is stopped, the position mark 33 is located at the top of the installation tube 31 along the radial direction, that is, the position mark 33 is facing upward, ensuring that the two hanging holes 23 are relative to the fallopian tubes on both sides of the uterus.

[0045] (3) Inserting and fixing the IUD 1: Use the placement device to insert the IUD 1 into the fixing cylinder 21 through the installation cylinder 31. During the insertion process, keep the two ring arms 12 of the IUD 1 horizontal. When the top of the IUD 1 is against the top of the positioning block 27, the two ring arms 12 of the IUD 1 are opposite to the two hanging holes 23. Move the installation cylinder 31 outward for a distance so that the hanging holes 23 are not blocked by the installation cylinder 31. Release the IUD 1 in the fixing cylinder 21 through the placement device. The two ring arms 12 of the IUD 1 extend from the hanging holes 23 at the corresponding positions. The IUD 1 is suspended and fixed on the fixing cylinder 21 by the ring arms 12, thereby fixing the position of the IUD 1 and the uterine wall.

[0046] (4) Take out the installation part 3 and the placement device: Take out the installation tube 31 and the placement device together, cut short the tail thread 13 and the pull line 26 of the IUD 1, and leave about 2 cm of the tail thread 13 and the pull line 26 of the Shudie IUD 1 outside the cervix.

[0047] (5) Removing the fixing part 2 and the IUD 1: When the IUD 1 reaches its service life, the fixing part 2 is pulled outward along the axis by the pulling wire 26, and the fixing part 2 together with the IUD 1 suspended thereon is removed from the uterus.

[0048] Example 2

[0049] T-shaped IUD external fixator, such as attached Figure 6 As shown, the difference between it and embodiment 1 is that: the limiting member includes a limiting block 25 and a limiting groove 34, a plurality of limiting blocks 25 are fixedly connected to the outer wall of the fixed cylinder 21 along the circumferential direction, and the plurality of limiting blocks 25 are evenly distributed along the circumferential direction of the fixed cylinder 21; a limiting groove 34 is opened on the inner wall of the mounting cylinder 31 at the position corresponding to the limiting block 25, the limiting groove 34 axially penetrates the top of the mounting cylinder 31, and the limiting block 25 is slidably connected in the limiting groove 34. This solution provides another limiting member structure.

[0050] Example 3

[0051] T-shaped IUD external fixator, such as attached Figure 7 As shown, the difference from Embodiment 1 or 2 is that a vertical connecting section 28 is integrally formed at the top of the fixing rod 24, the connecting section 28 is coaxially arranged with the fixing cylinder 21, and the top of the connecting section 28 is conical.

[0052] Before the fixing rod 24 is screwed into the uterine wall, the connecting section 28 can be inserted into the uterine wall to achieve a preliminary connection between the fixing rod 24 and the uterine wall, thereby avoiding displacement of the fixing rod 24 during the process of rotating and inserting it into the uterine wall, thereby helping to reduce damage to the connection between the uterine wall and the connecting rod.

[0053] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. T-shaped IUD external fixator, characterized in that: It includes a fixing part and a mounting part. The fixing part includes a fixing cylinder and a fixing plate arranged on the top of the fixing cylinder. Two penetrating hanging holes are relatively opened on the side wall of the fixing cylinder. A fixing rod is arranged on the top of the fixing plate corresponding to the axial position of the fixing cylinder. The fixing rod is spiral-shaped. The mounting part includes a mounting cylinder coaxially movably sleeved on the fixing cylinder. The top of the mounting cylinder is abutted against the bottom of the fixing plate. A limit piece is arranged between the mounting cylinder and the fixing cylinder. The limit piece is used to limit the relative rotation of the mounting cylinder and the fixing cylinder.

2. The T-shaped IUD external fixator according to claim 1, characterized in that: The limiting member includes a limiting block and a matching block. A plurality of limiting blocks are circumferentially arranged on the outer wall of the fixed cylinder, and a corresponding number of matching blocks are circumferentially arranged on the inner wall of the mounting cylinder. The matching blocks are axially slidably connected between two adjacent limiting blocks.

3. The T-shaped IUD external fixator according to claim 1, characterized in that: The limiting member includes a limiting block and a limiting groove. A plurality of limiting blocks are arranged circumferentially on the outer wall of the fixed cylinder. A limiting groove is axially provided on the inner wall of the mounting cylinder at the position corresponding to the limiting block. The limiting groove runs through the top of the mounting cylinder, and the limiting block is slidably connected in the limiting groove.

4. The T-shaped IUD external fixator according to claim 2 or 3, characterized in that: A pulling wire is provided at the bottom of the fixing tube, and the pulling wire is used to pull the fixing tube.

5. The T-shaped IUD external fixator according to claim 4, characterized in that: A position mark is provided on the outer wall of the installation tube close to the bottom, and the position mark is used to indicate the position status of the two hanging holes.

6. The T-shaped IUD external fixator according to claim 5, characterized in that: A conical positioning block is arranged at the bottom of the fixing plate, the size of the positioning block gradually decreases from top to bottom, and the positioning block is coaxially arranged with the fixing cylinder.

7. The T-shaped IUD external fixator according to claim 6, characterized in that: The fixing plate is coaxially arranged with the fixing tube, the outer diameter of the fixing plate is larger than the outer diameter of the fixing tube, and the outer diameter of the fixing plate is smaller than or equal to the outer diameter of the mounting tube.

8. The T-shaped IUD external fixator according to claim 7, characterized in that: A vertical connecting section is provided on the top of the fixing rod. The connecting section is coaxially arranged with the fixing tube, and the top of the connecting section is conical.

Images