Fixing method and structure of intrauterine drug sustained release system

Abstract

The invention discloses a fixing method and structure of an intrauterine drug sustained release system, and relates to the field of medical instruments.The fixing structure comprises a mounting plate, the left side of the bottom face of the mounting plate is fixedly connected with the upper end of a fixing frame, the bottom end of the fixing frame is rotationally connected with the end of a lead screw through a bearing, and two threaded grooves opposite in spiral direction are formed in the lead screw; the two sections of threaded grooves are in threaded connection with second screw holes formed in the upper ends of two connecting frames correspondingly, the upper ends of the two connecting frames are in lap joint with the inner side face of a fixing frame, and the bottom ends of the two connecting frames are fixedly connected with the right ends of two expanding and supporting plates correspondingly. When the LNG-IUS and the fixing rope are fixed, the LNG-IUS and the fixing rope can be rapidly and accurately placed in the uterine cavity of a patient through the fixing mechanism, the LNG-IUS can be inserted into the uterine muscle layer of the patient through an ejector pin in the fixing mechanism to fix the LNG-IUS, therefore, falling and displacement of the LNG-IUS are avoided, and the method is short in treatment time consumption, low in cost and high in practicability. And the outpatient service can complete execution.

Description

Technical Field

[0001] The invention relates to a medical device, and in particular to a fixing method and structure of an intrauterine drug sustained-release system. Background Art

[0002] Adenomyosis, also known as adenomyosis, refers to the invasion of endometrial glands and stroma into the myometrium, and the periodic proliferation, exfoliation, bleeding, etc., which cause corresponding symptoms. Common symptoms are dysmenorrhea and increased menstrual blood volume. Some patients are in excruciating pain, and some patients may become infertile. In the past, it often relapsed after oral medication treatment and was called "immortal cancer" by many women. Although it is rarely life-threatening, the harm and pain it brings to patients is very great, seriously affecting their health and life, and often causing patients to have to undergo hysterectomy surgery reluctantly.

[0003] The levonorgestrel-releasing intrauterine system (LNG-IUS) should be used as the first-line treatment option for adenomyosis, avoiding the pain of surgical hysterectomy and organ loss, and is increasingly accepted by patients. However, these patients often have a significant widening and enlargement of the uterine cavity, which is too large and easy to move downward or fall off during the LNG-IUS prevention and treatment process, resulting in treatment failure. In view of this, a fixing method and structure of an intrauterine drug sustained-release system is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a fixing method and structure of an intrauterine drug sustained-release system to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for fixing an intrauterine drug sustained-release system, characterized in that it comprises the following steps:

[0006] a1. Cut off the tail wire of LNG-IUS and use the tail wire to tie LNG-IUS and fixing rope together, then expand the patient's vaginal opening by moving the two expansion plates away from each other, and adjust the height of the support column to make the support column contact with the treatment bed to support the installation plate;

[0007] a2. Then use the uterine cavity probe to check the depth and direction of the uterine cavity, and adjust the positioning plate 1 to the appropriate position according to the patient's uterine cavity depth. At this time, put the tip of the thimble into the knot, then fold the top of the LNG-IUS, and insert the LNG-IUS, the fixing rope and the thimble into the cannula 1;

[0008] a3. Then put the cannula 1 in the fixing mechanism into the patient's vagina and uterine cavity, and then use the thimble to push the LNG-IUS and the fixing rope from the cannula 1 into the uterine cavity, and use the thimble to insert the knot into the muscular layer of the bottom of the uterine cavity for 1CM, then take out the cannula 1, cannula 2 and the thimble from the patient's body, and control the contraction of the two expansion plates to take them out.

[0009] A fixing structure of an intrauterine drug sustained-release system, comprising a mounting plate, the left side of the bottom surface of the mounting plate is fixedly connected to the upper end of a fixing frame, the bottom end of the fixing frame is rotatably connected to the end of a lead screw through a bearing, the lead screw is provided with two sections of threaded grooves with opposite spiral directions, and the two sections of threaded grooves are respectively threadedly connected to two screw holes provided at the upper ends of two connecting frames, the upper ends of the two connecting frames are both overlapped with the inner side surfaces of the fixing frames, and the bottom ends of the two connecting frames are respectively fixedly connected to the right ends of two expansion plates;

[0010] The right side of the bottom surface of the mounting plate is fixedly connected to the upper end of the support plate, and a placement hole is opened at the bottom end of the support plate to be sleeved with a fixing mechanism. The front and rear ends of the bottom surface of the mounting plate are respectively fixedly connected to the upper ends of two sleeves, and the two sleeves are respectively sleeved with two support columns. The middle part of the upper surface of the mounting plate is fixedly connected to the bottom end of the handle.

[0011] As a preferred technical solution of the present invention, the outer side surfaces of the two support columns are overlapped with the left ends of the two limit screws respectively, and the two limit screws are threadedly connected with the two screw holes four respectively, and the two screw holes four are respectively opened at the bottom ends of the cylinder walls of the two sleeves.

[0012] As a preferred technical solution of the present invention, a screw hole three is provided on the bottom surface of the support plate and the upper end of the screw hole three is connected to the placement hole. The screw hole three is threadedly connected to the screw rod two. The upper end optical axis of the screw rod two is rotatably connected to the bottom surface of the fixed block through a bearing. The fixed block is rotatably connected to the bottom surface of the splint through a hinge seat.

[0013] As a preferred technical solution of the present invention, the fixing mechanism includes a sleeve 1, the left end of the sleeve 1 is sleeved in the placement hole, the sleeve 1 is also sleeved in the sleeve hole, the sleeve hole is opened in the middle of the positioning plate 1, the front and rear ends of the right side of the positioning plate 1 are respectively fixedly connected to the bottom ends of the two connecting rods, and the outer side surface of the sleeve 1 is provided with scale lines.

[0014] As a preferred technical solution of the present invention, the upper ends of the two connecting rods are fixedly connected to the right side surface of the fixing plate 2, a screw hole 1 is opened in the middle of the fixing plate 2, the screw hole 1 is threadedly connected to the screw rod 1, and the left end optical axis of the screw rod 1 is rotatably connected to the upper end of the fixing plate 1 through a bearing.

[0015] As a preferred technical solution of the present invention, the bottom end of the fixing plate 1 is fixedly connected to the outer side of the casing 1, the casing 1 is sleeved with casing 2, LNG-IUS and fixing rope, and the LNG-IUS is tied to the fixing rope.

[0016] As a preferred technical solution of the present invention, a knot is provided at the left end of the fixing rope, the upper end of the knot is sleeved with the left end of the thimble, and the thimble is sleeved in the second sleeve.

[0017] As a preferred technical solution of the present invention, the outer side surface of the sleeve 2 is fixedly connected to the bottom surface of the fixed plate 3, and a slide groove 1 is provided on the upper surface of the fixed plate 3. The slide groove 1 is slidably connected to the bottom end of the positioning plate 2, and the upper end of the positioning plate 2 is socketed with the right end of the sleeve 1.

[0018] As a preferred technical solution of the present invention, a second slide groove is opened at the right end of the outer side surface of the ejector pin, the second slide groove is sleeved with the bottom end of the positioning plate three, and the upper end of the positioning plate three is overlapped with the right end of the sleeve two.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When fixing the LNG-IUS and the fixing rope, the present invention can use the fixing mechanism to quickly and accurately place the LNG-IUS and the fixing rope in the patient's uterine cavity, and can use the thimble in the fixing mechanism to insert the knot into the patient's uterine myometrium to fix the LNG-IUS, thereby preventing the LNG-IUS from falling off and shifting. In addition, the treatment method is time-consuming and low-cost, and can be performed in an outpatient clinic.

[0021] 2. During use, the present invention can use a clamp to clamp and fix the sleeve one, so that the user does not need to hold the sleeve one to stabilize it when operating the sleeve two and the ejector pin. When in use, the positioning plate one, positioning plate two and positioning plate three can be used to judge the positions of the sleeve one, LNG-IUS, fixing rope and ejector pin, so that the entire operation process is visualized to improve the fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the expansion support plate structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the splint structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the support column structure of the present invention;

[0026] Figure 5It is a schematic diagram of the fixing mechanism structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the LNG-IUS of the present invention;

[0028] Figure 7 It is a schematic diagram of the fixing rope structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the second sleeve of the present invention.

[0030] In the figure: 1. mounting plate; 2. fixing frame; 3. lead screw; 4. grip; 5. fixing mechanism; 51. sleeve one; 52. sleeve hole; 53. positioning plate one; 54. fixing plate one; 55. screw one; 56. screw hole one; 57. fixing plate two; 58. connecting rod; 59. ejector pin; 510. sleeve two; 511. LNG-IUS; 512. fixing rope; 513. knot; 514. positioning plate two; 515. slideway one; 516. fixing plate three; 517. positioning plate three; 518. slideway two; 6. support plate; 7. support column; 8. sleeve; 9. connecting frame; 10. screw hole two; 11. expansion support plate; 12. placement hole; 13. clamping plate; 14. screw hole three; 15. screw two; 16. fixing block; 17. screw hole four; 18. limit screw. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-8 The present invention provides a technical solution of the fixing structure of an intrauterine drug sustained-release system: it comprises a mounting plate 1, the left side of the bottom surface of the mounting plate 1 is fixedly connected to the upper end of a fixing frame 2, the bottom end of the fixing frame 2 is rotatably connected to the end of a lead screw 3 through a bearing, the lead screw 3 is provided with two sections of threaded grooves with opposite spiral directions, and the two sections of threaded grooves are respectively threadedly connected to the screw holes 10 provided at the upper ends of two connecting frames 9, the upper ends of the two connecting frames 9 are overlapped with the inner side surfaces of the fixing frame 2, and the bottom ends of the two connecting frames 9 are respectively fixedly connected to the right ends of two expansion plates 11. When using the device, the user holds the handle 4 to take the mounting plate 1 and moves it, puts the left end of the expansion plate 11 into the patient's vagina, and rotates the lead screw 3 to use the screw hole 10 to drive the two expansion plates 11 to move away from each other. At this time, the patient's vaginal opening is expanded by the mutual distance between the two expansion plates 11, so as to facilitate the subsequent insertion of the sleeve 1 51 into the patient's vagina.

[0033] The right side of the bottom surface of the mounting plate 1 is fixedly connected to the upper end of the support plate 6. A placement hole 12 is opened at the bottom end of the support plate 6 to be sleeved with the fixing mechanism 5. The front and rear ends of the bottom surface of the mounting plate 1 are respectively fixedly connected to the upper ends of the two sleeves 8. The two sleeves 8 are respectively sleeved with the two support columns 7. The middle part of the upper surface of the mounting plate 1 is fixedly connected to the bottom end of the handle 4.

[0034] The outer side surfaces of the two support columns 7 are overlapped with the left ends of the two limit screws 18 respectively, and the two limit screws 18 are threadedly connected with the two screw holes 17 respectively. The two screw holes 17 are respectively opened at the bottom ends of the tube walls of the two sleeves 8. After the patient's vaginal opening is expanded by using the expansion plate 11, the user rotates the limit screw 18 to make the limit screw 18 disengage from the support column 7, and pulls the support column 7 downward so that the bottom end of the support column 7 contacts the treatment bed to support the mounting plate 1, and then rotates the limit screw 18 in the opposite direction so that the limit screw 18 contacts the support column 7 again, thereby eliminating the need to hold the mounting plate 1 in place during the treatment operation.

[0035] A screw hole three 14 is provided on the bottom surface of the support plate 6, and the upper end of the screw hole three 14 is connected with the placement hole 12, the screw hole three 14 is threadedly connected with the screw rod two 15, the upper end optical axis of the screw rod two 15 is rotatably connected with the bottom surface of the fixing block 16 through a bearing, and the fixing block 16 is rotatably connected with the bottom surface of the clamping plate 13 through a hinge seat. After the sleeve 1 51 is placed into the patient's uterine cavity, the screw rod two 15 is rotated to make the clamping plate 13 move up to contact with the sleeve 1 51 to clamp and position the sleeve 1 51, so that when operating the sleeve 2 510 and the ejector pin 59, the user does not need to hold the sleeve 1 51 to stabilize it, and the wall of the sleeve 1 51 is relatively thin to adapt to its entry and exit in the vagina.

[0036] The fixing mechanism 5 includes a sleeve 51, the left end of which is sleeved in the placement hole 12, and the sleeve 51 is also sleeved in the sleeve hole 52. The sleeve hole 52 is opened in the middle of the positioning plate 53, and the front and rear ends of the right side of the positioning plate 53 are respectively fixedly connected to the bottom ends of the two connecting rods 58, and the outer side of the sleeve 51 is provided with scale lines.

[0037] The upper ends of the two connecting rods 58 are fixedly connected to the right side surface of the fixing plate 57. A screw hole 56 is opened in the middle of the fixing plate 57. The screw hole 56 is threadedly connected to the screw rod 55. The left end optical axis of the screw rod 55 is rotatably connected to the upper end of the fixing plate 54 through a bearing. Before treatment, the uterine cavity depth and direction are checked with a uterine cavity probe, and the screw rod 55 is rotated according to the patient's uterine cavity depth to drive the fixing plate 57, the connecting rod 58 and the positioning plate 53 to move to the right using the screw hole 56. After the positioning plate 53 is adjusted to a suitable position, the screw rod 55 is stopped, thereby limiting the entry depth of the sleeve 51 using the positioning plate 53.

[0038] The bottom end of the fixing plate 1 54 is fixedly connected to the outer side surface of the casing 1 51 . The casing 1 51 is provided with a casing 2 510 , an LNG-IUS 511 and a fixing rope 512 . The LNG-IUS 511 and the fixing rope 512 are tied together.

[0039] A knot 513 is provided at the left end of the fixing rope 512 , and the upper end of the knot 513 is sleeved with the left end of the thimble 59 , and the thimble 59 is sleeved in the second sleeve 510 .

[0040] The outer side surface of the second sleeve 510 is fixedly connected to the bottom surface of the third fixing plate 516. The upper surface of the third fixing plate 516 is provided with a slide groove 515. The slide groove 515 is slidably connected to the bottom end of the second positioning plate 514. The upper end of the second positioning plate 514 is sleeved with the right end of the first sleeve 51.

[0041] A second slide groove 518 is provided at the right end of the outer side surface of the ejector pin 59, and the second slide groove 518 is sleeved with the bottom end of the positioning plate three 517, and the upper end of the positioning plate three 517 is overlapped with the right end of the second sleeve 510. After the sleeve 1 51 is placed in the patient's uterine cavity, the user can hold the second sleeve 510 and the right end of the ejector pin 59 to push the second sleeve 510 and the ejector pin 59 to move to the left. When the ejector pin 59 moves to the left, the LNG-IUS511 and the fixing rope 512 are extended from the sleeve 1 51 into the patient's uterine cavity through the knot 513. When the sleeve 2 510 moves to the left, the positioning plate 2 514 slides along the slide groove 1 515. When the positioning plate 2 514 slides to the right end of the slide groove 1 515, the folded part of the LNG-IUS511 is completely moved to the outside of the sleeve 1 51 and unfolded, and then the sleeve 1 51 is kept fixed. The thimble 59 is moved to the left, so that the thimble 59 drives the knot 513 and the LNG-IUS511 to continue to move to the left, and at this time the positioning plate three 517 slides along the slide groove two 518. When the positioning plate three 517 slides to the right end of the slide groove two 518, the thimble 59 inserts the knot 513 into the patient's uterine myometrium 1CM deep, and then pulls the thimble 59 to the right so that the thimble 59 is pulled out of the uterine myometrium, and at this time the left end of the sleeve two 510 contacts the uterine cavity wall to limit the knot 513 so that the knot 513 remains in the uterine myometrium, thereby using the knot 513 inserted into the uterine myometrium to fix the LNG-IUS511 to prevent it from falling off or shifting. A barb structure is provided on the knot 513, thereby preventing the knot 513 from naturally detaching from the myometrium after implantation.

[0042] The operating steps of the present invention are:

[0043] a1. Tie the LNG-IUS 511 and the fixing rope 512 together, then hold the handle 4 to take the mounting plate 1 and move it, put the left end of the expansion plate 11 into the patient's vagina, and turn the lead screw 3 to use the screw hole 2 10 to drive the two expansion plates 11 to move away from each other. At this time, the patient's vaginal opening is expanded by the two expansion plates 11 moving away from each other. Then the user turns the limit screw 18 to make the limit screw 18 disengage from the support column 7, and pulls the support column 7 downward so that the bottom end of the support column 7 contacts the treatment bed to support the mounting plate 1, and then reversely turns the limit screw 18 to make the limit screw 18 contact the support column 7 again;

[0044] a2. Then use the uterine cavity probe to check the depth and direction of the uterine cavity, and according to the patient's uterine cavity depth, rotate the screw 55 and use the screw hole 56 to drive the fixing plate 57, the connecting rod 58 and the positioning plate 53 to move to the right. After adjusting the positioning plate 53 to a suitable position, stop rotating the screw 55. At this time, put the tip of the ejector pin 59 into the knot 513, then fold the top of the LNG-IUS511, and insert the LNG-IUS511, the fixing rope 512 and the ejector pin 59 into the sleeve 51 until the positioning plate 514 at the left end of the slide 515 contacts the right end of the sleeve 51. At this time, the left end of the LNG-IUS511 is flush with the left end of the sleeve 51;

[0045] a3. Then, hold the sleeve 1 51, the sleeve 2 510 and the ejector pin 59 at the same time to put the sleeve 1 51 into the patient's vagina and uterine cavity. When the positioning plate 1 53 contacts the support plate 6, the left end of the sleeve 1 51 moves into the patient's uterine cavity and is at a corresponding distance from the bottom of the uterine cavity. Then, the user rotates the screw 2 15 to make the clamp 13 move up to contact with the sleeve 1 51 to clamp and position the sleeve 1 51. At this time, the user can hold the right end of the sleeve 2 510 and the ejector pin 59 to push the sleeve 2 510 and the ejector pin 59 to move to the left. When the ejector pin 59 moves to the left, it drives the LNG-IUS 511 and the fixing rope 512 to extend from the sleeve 1 51 into the patient's uterine cavity through the knot 513. When the sleeve 2 510 moves to the left, the positioning plate 2 514 slides along the slide groove 1 515. When the positioning plate 2 514 slides to the right end of the slide groove 1 515 At this time, the folded part of LNG-IUS511 is completely moved to the outside of sleeve 1 51 and unfolded, and then sleeve 1 51 is kept stationary, and the ejector pin 59 is pushed to move left so that the ejector pin 59 drives the knot 513 and LNG-IUS511 to continue to move left, and at this time, the positioning plate 3 517 slides along the slide groove 2 518, and when the positioning plate 3 517 slides to the right end of the slide groove 2 518, the ejector pin 59 inserts the knot 513 into the patient's uterine myometrium 1CM deep, and then the ejector pin 59 is pulled to the right so that the ejector pin 59 is pulled out of the uterine myometrium, and at this time, the left end of sleeve 2 510 contacts the uterine cavity wall to limit the knot 513 so that the knot 513 remains in the uterine myometrium, and then the sleeve 1 51, sleeve 2 510 and ejector pin 59 are all taken out of the patient's body, and the two expansion plates 11 are controlled to contract to take them out.

[0046] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for fixing an intrauterine drug sustained-release system, characterized in that: The following steps are involved: a1. Tie the LNG-IUS (511) and the fixing rope (512) together, then expand the patient's vaginal opening by moving the two expansion plates (11) away from each other, and adjust the height of the support column (7) so that the support column (7) contacts the treatment bed to support the mounting plate (1); a2. Then, the uterine cavity depth and direction are checked using a uterine cavity probe, and the positioning plate 1 (53) is adjusted to a suitable position according to the patient's uterine cavity depth. At this time, the tip of the ejector pin (59) is inserted into the knot (513), and then the top of the LNG-IUS (511) is folded, and the LNG-IUS (511), the fixing rope (512) and the ejector pin (59) are all inserted into the cannula 1 (51); a3. Then, insert the sleeve 1 (51) in the fixing mechanism (5) into the patient's vagina and uterine cavity, and then use the ejector pin (59) to push the LNG-IUS (511) and the fixing rope (512) out of the sleeve 1 (51) into the uterine cavity, and use the ejector pin (59) to insert the knot (513) 1 cm into the muscular layer at the bottom of the uterine cavity, and then remove the sleeve 1 (51), sleeve 2 (510) and ejector pin (59) from the patient's body, and control the two expansion plates (11) to contract to remove them.

2. The structure used in the method for fixing an intrauterine drug sustained-release system according to claim 1 comprises a mounting plate (1), characterized in that: The left side of the bottom surface of the mounting plate (1) is fixedly connected to the upper end of the fixing frame (2), the bottom end of the fixing frame (2) is rotatably connected to the end of the lead screw (3) through a bearing, the lead screw (3) is provided with two sections of threaded grooves with opposite spiral directions, and the two sections of the threaded grooves are respectively threadedly connected to the second screw holes (10) provided at the upper ends of the two connecting frames (9), the upper ends of the two connecting frames (9) are overlapped with the inner side surfaces of the fixing frame (2), and the bottom ends of the two connecting frames (9) are respectively fixedly connected to the right ends of the two expansion plates (11); The right side of the bottom surface of the mounting plate (1) is fixedly connected to the upper end of the support plate (6); the bottom end of the support plate (6) is provided with a placement hole (12) which is sleeved with the fixing mechanism (5); the front and rear ends of the bottom surface of the mounting plate (1) are respectively fixedly connected to the upper ends of two sleeves (8); the two sleeves (8) are respectively sleeved with two support columns (7); the middle part of the upper surface of the mounting plate (1) is fixedly connected to the bottom end of the handle (4).

3. The fixing structure of the intrauterine drug sustained-release system according to claim 2, characterized in that: The outer side surfaces of the two support columns (7) are overlapped with the left ends of the two limit screws (18), and the two limit screws (18) are threadedly connected with the two screw holes (17) respectively. The two screw holes (17) are respectively opened at the bottom ends of the cylinder walls of the two sleeves (8).

4. The fixing structure of the intrauterine drug sustained-release system according to claim 2, characterized in that: The bottom surface of the support plate (6) is provided with a screw hole three (14), and the upper end of the screw hole three (14) is connected to the placement hole (12). The screw hole three (14) is threadedly connected to the screw rod two (15). The upper end optical axis of the screw rod two (15) is rotatably connected to the bottom surface of the fixing block (16) through a bearing. The fixing block (16) is rotatably connected to the bottom surface of the clamping plate (13) through a hinge seat.

5. The fixing structure of the intrauterine drug sustained-release system according to claim 2, characterized in that: The fixing mechanism (5) comprises a sleeve (51), the left end of which is sleeved in the placement hole (12), and the sleeve (51) is also sleeved in a sleeve hole (52). The sleeve hole (52) is provided in the middle of a positioning plate (53), and the front and rear ends of the right side of the positioning plate (53) are respectively fixedly connected to the bottom ends of two connecting rods (58), and the outer side surface of the sleeve (51) is provided with scale lines.

6. The fixing structure of the intrauterine drug sustained-release system according to claim 5, characterized in that: The upper ends of the two connecting rods (58) are fixedly connected to the right side surface of the second fixing plate (57), and a screw hole (56) is provided in the middle of the second fixing plate (57). The screw hole (56) is threadedly connected to the screw rod (55), and the left end optical axis of the screw rod (55) is rotatably connected to the upper end of the first fixing plate (54) through a bearing.

7. The fixing structure of the intrauterine drug sustained-release system according to claim 6, characterized in that: The bottom end of the fixing plate 1 (54) is fixedly connected to the outer side surface of the casing 1 (51), and the casing 1 (51) is provided with a casing 2 (510), an LNG-IUS (511) and a fixing rope (512), and the LNG-IUS (511) is tied to the fixing rope (512).

8. The fixing structure of the intrauterine drug sustained-release system according to claim 7, characterized in that: The left end of the fixing rope (512) is provided with a knot (513), the upper end of the knot (513) is sleeved with the left end of the thimble (59), and the thimble (59) is sleeved in the second sleeve (510).

9. The fixing structure of the intrauterine drug sustained-release system according to claim 8, characterized in that: The outer side surface of the sleeve 2 (510) is fixedly connected to the bottom surface of the fixed plate 3 (516), and the upper surface of the fixed plate 3 (516) is provided with a slide groove 1 (515), and the slide groove 1 (515) is slidably connected to the bottom end of the positioning plate 2 (514), and the upper end of the positioning plate 2 (514) is sleeved with the right end of the sleeve 1 (51).

10. The fixing structure of the intrauterine drug sustained-release system according to claim 8, characterized in that: A second slide groove (518) is provided at the right end of the outer side surface of the ejector pin (59), and the second slide groove (518) is sleeved with the bottom end of the third positioning plate (517), and the upper end of the third positioning plate (517) is overlapped with the right end of the second sleeve (510).

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