Disposable Intrauterine Stent

Abstract

The present invention relates to the technical field of medical devices, and particularly to a disposable intrauterine stent, which comprises a stent body and a fixing rod integrally connected, and further comprises a traction rope and a pushing sleeve. The pushing sleeve is slidably sleeved on the fixing rod. A first fixing point is arranged in the middle of the top end of the stent body, and a second fixing point and a third fixing point for binding the traction rope are respectively arranged on the two wings of the top end of the stent body. A channel for the vertical penetration of the traction rope is arranged in the inner cavity of the stent body. One end of the traction rope is respectively bound and connected to the first fixing point and the second fixing point, and the other end of the traction rope passes through the channel and is externally fixed to the inner side wall of the sleeve part. The present invention reduces the operation time and the operation difficulty, and at the same time reduces the discomfort of the patient; the intrauterine stent is deployed at a controlled speed, effectively avoiding the mechanical damage to the inner wall of the uterine cavity caused by the rapid expansion of the cavity stent; the structure is simple, which is convenient for postoperative removal and effectively prevents the adhesion of the anterior and posterior walls, the two side walls and the two uterine horns of the uterine cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a disposable intrauterine stent. Background Art

[0002] Intrauterine adhesion is a pathological phenomenon in which partial or complete adhesions are formed after damage to the intrauterine endometrium. For example, curettage after induced abortion, medical abortion, mid-trimester induction of labor or full-term delivery, diagnostic curettage of the non-pregnant uterus, myomectomy, submucous myoma resection, hysteroscopic endometrial resection, etc. can all cause intrauterine adhesions, which usually lead to abnormal menstruation, such as scanty menstruation or amenorrhea, etc. Patients are prone to miscarriage, premature birth, ectopic pregnancy, intrauterine fetal death, placenta accreta, placental adhesion, and even infertility or hematometra. In recent years, more and more clinicians have chosen to use methods such as hysteroscopy surgery to treat uterine diseases. In many years of clinical work, various shapes of intrauterine stents have emerged, including circular, T-shaped, and uterine-shaped. Among them, the uterine-shaped one has received more attention in clinical practice because its contour is closer to the shape of the uterine cavity and the effect of preventing intrauterine adhesions is better.

[0003] A stable uterine stent with the publication number of CN108186089A. In this patent, the uterine-shaped ring of the intrauterine stent will not cause harm to the human body, and the uterine-shaped ring, connecting ring, and film can effectively prevent the recurrence of adhesions between the anterior and posterior walls, both side walls, both uterine horns, and the lower uterine segment of the uterine cavity; and the hardness of the uterine-shaped ring can ensure that it can pass through the cervix well and can fit well with the periphery of the uterine inner wall after reaching the uterine cavity, playing a good supporting role for the uterine cavity. However, during its use, doctors still need to use an external cervical dilator to widen the channel to 7-8 cm to completely place it in, which not only adds surgical steps but also increases the discomfort of the patient.

[0004] In addition, during the process of pushing the existing uterine stent into the cervix, the uterine stent needs to be rotated and rolled up first to pass through the narrow cervix. Since the uterine stent is made of a memory flexible material, it will automatically expand. During the process of pushing it into the cervix, the expanded uterine stent will bring discomfort to the patient. If the uterine stent is wound and tied with a strap, an endoscope and surgical scissors still need to be inserted into the uterine cavity for cutting operation, which increases the operation time and difficulty. And after cutting, the suddenly expanded uterine stent may cause harm to the uterine cavity, increasing the surgical risk. Summary of the Invention

[0005] The present invention provides a disposable intrauterine stent to solve the above technical problems.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] Disposable intrauterine stent, comprising a stent body and a fixing rod. The stent body is made of an elastic material and is fixedly arranged at the top end of the fixing rod. It also includes a traction rope and a push sleeve. The push sleeve is slidably sleeved on the fixing rod. The push sleeve includes a sleeve part at the upper end and a push-pull part at the lower end. The inner cavity of the sleeve part is provided with a space for accommodating the wound-up stent body. The middle part of the top end of the stent body is provided with a first fixing point. The two wings at the top end of the stent body are respectively provided with a second fixing point and a third fixing point for tying the traction rope. The inner cavity of the stent body is provided with a channel for the vertical penetration of the traction rope. The first fixing point is provided with a first through hole communicating with the channel. The side wall at the bottom end of the stent body is provided with a second through hole communicating with the channel. One end of the traction rope is respectively tied and connected to the second fixing point and the third fixing point. The other end of the traction rope sequentially passes through the first through hole, the channel and the second through hole, and is externally fixed to the inner side wall of the sleeve part.

[0008] Further, a vertical guiding groove is provided in the channel. The upper end of the guiding groove communicates with the first through hole, and the lower end of the guiding groove communicates with the second through hole. The traction rope passes through the inner cavity of the stent body to form a traction mechanism. Through the sliding operation of the push sleeve and the limiting effect of the second through hole, the winding and unfolding adjustment of the stent body can be realized, which is convenient for being put into the push sleeve and can control the unfolding speed of the stent body to avoid mechanical damage to the inner wall of the uterine cavity.

[0009] Further, soft rubber racks are provided on the inner groove wall of the guiding groove. A speed reduction clamping seat adapted to the soft rubber racks is provided on the traction rope. Soft rubber teeth are provided on both sides of the speed reduction clamping seat. The soft rubber teeth and the soft rubber racks are mutually engaged. When the traction rope is pulled, a relative displacement occurs between the speed reduction clamping seat and the guiding groove. At this time, a resistance is generated between the soft rubber racks and the soft rubber teeth. This resistance is less than the elastic potential energy of the stent body to restore to the planar state, ensuring that the stent body can be completely restored to the flat state, but the restoration speed will be reduced due to the resistance. Through this structural design, it can ensure that during the process of the medical staff pulling the push sleeve, it can assist the medical staff in speed control and avoid mechanical damage to the inner wall of the uterine cavity caused by the rapid unfolding of the stent body due to an operation error (too fast pulling speed of the push sleeve 4).

[0010] Furthermore, the tow rope is of a Y-shaped structure. The two end vertices of the tow rope are respectively bundled and connected to the second fixed point and the third fixed point. The lower end of the tow rope passes through the guide groove and is fixedly connected to the sleeve part. The first fixed point is located between the second fixed point and the third fixed point. After the tow rope is bundled and fixed and passes through the first fixed point, by applying a pulling force to the tow rope, the second fixed point and the third fixed point are made to approach the first fixed point, that is, the two wings of the stent body approach the center, forming a retracted state. In this state, it is convenient to retract the stent body into the sleeve part, and the situation where the stent body cannot be retracted into the sleeve part when it is in the deployed state will not occur.

[0011] Furthermore, one end of the tow rope is fixedly connected to the upper end of the inner wall of the sleeve part. One end of the tow rope is fixed to the upper end of the inner wall of the sleeve part, the other end is fixed to the second fixed point and the third fixed point, and the middle section of the tow rope is clamped at the second through hole. At this time, the tow rope is in a V-shaped state. When the sleeve part moves downward, that is, when the medical staff holds the push-pull part and pulls it downward, the fixed end of the tow rope and the push-pull part approaches the second through hole. Since the other end of the straightened tow rope pulls the second fixed point and the third fixed point, the stent body will gradually be released from the retracted state to the flat state at this time. When the sleeve part moves to the second through hole, the tow rope changes from a V-shaped state to a straight line state, and the stent body is also in the deployed flat state.

[0012] Furthermore, when the push sleeve completely covers the stent body, the tow rope is in a straightened state, and when the push sleeve is completely separated from the stent body, the stent body is in a fully deployed state. Before pushing the stent body into the uterine cavity, the stent body needs to be retracted and put into the push sleeve for easy passage through the cervix guided by the push sleeve. After passing through the cervix, the stent body needs to be deployed to support the uterine cavity. In the prior art, medical staff need to separately retract the stent body, put it into the guiding push sleeve, and perform separate operations with an endoscope and surgical scissors. However, the solution of this application only needs to push and pull the push sleeve back and forth to achieve the above operation steps, greatly improving the operation efficiency. In the prior art, after the stent body 1 is placed, liquid substances such as anti-adhesion glue and anti-inflammatory drugs are injected through a catheter to prevent re-adhesion of the wound surface. Conventional techniques will set a cervical balloon tube at the upper end of the fixing rod 2. By inflating the cervical balloon tube, the drugs injected into the uterine cavity can be prevented from flowing out. Corresponding to the solution of this application, a drainage channel can be set to inject corresponding liquid substances into the uterine cavity, and the push sleeve can be regarded as the cervical balloon tube to block the cervix, prevent the drugs injected into the uterine cavity from flowing out, and effectively avoid adhesion of the cervical os.

[0013] Furthermore, several raised dots are provided on both sides of the stent body, and the raised dots are evenly distributed on the side wall of the stent body. When the stent is deployed, the raised dots come into contact with the endometrium to form micro-gaps, providing mechanical support to prevent the anterior and posterior walls of the endometrium from adhering. In addition, a round hole is designed at the lower end of the stent body, and a drainage channel for discharging intrauterine effusion is provided inside the stent body and the fixing rod. The inside of the round hole is communicated with the drainage channel of the fixing rod, and the provided raised dots also facilitate the flow of intrauterine secretions through the gaps, facilitating the discharge of intrauterine effusion and effectively reducing the risk of infection.

[0014] Furthermore, scale marks are provided on both the stent body and the fixing rod, and the scale marks are evenly arranged along the outer side walls of the stent body and the fixing rod. The scale marks on the stent body facilitate medical staff to observe the depth of the stent entering the cervical os through the scale of the stent, and can judge the position of the stent body in real time. Clinical trials show that this design controls the error between the top of the stent body and the uterine fundus within ±2 mm, and improves the operation accuracy by 85% compared with blind insertion.

[0015] Furthermore, a holding handle is provided at the bottom of the fixing rod. A pushing groove for the sliding connection of the fixing rod is provided at the end of the holding handle, and an operation port for controlling the fixing rod is also provided on the side wall of the holding handle. When medical staff holds the holding handle, fine adjustment can be achieved by pushing the pressing handle back and forth with the thumb, thereby achieving fine adjustment of the forward and backward movement of the fixing rod. If the fixing rod and the holding handle are integrally fixed, the forward and backward adjustment of the fixing rod needs to be achieved by pushing the arm back and forth. This requires a high level of stability of the arm and is not supported by a stable fixed axis, making it inconvenient to control the forward and backward fine adjustment. The solution of the present application facilitates regarding the arm as a fixed axis, and through the fine adjustment control of the thumb, it is convenient to precisely control the forward and backward movement of the fixing rod, reducing the operation difficulty of medical staff.

[0016] Furthermore, a pressing handle is provided at the bottom of the fixing rod. The pressing handle is arranged on the operation port, and anti-slip pads are provided on the side walls of the pressing handle and the pushing and pulling part. The anti-slip pads on the pressing handle and the pushing and pulling part are provided with deep diamond-shaped raised textures on the surface. When medical staff operate while wearing latex gloves, the friction coefficient between the pad and the glove can reach 0.8 - 1.2, ensuring stable force application even in an environment polluted by intrauterine secretions.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the linkage design of the push sleeve and the traction rope, the present invention enables the stent body to maintain a pre-wound compressed state within the sleeve portion. When the push-pull part moves downward, the traction rope gradually releases the stent body through the damping cooperation of the guide groove and the speed-reducing clamping seat, replacing the traditional step of cutting the binding strap, achieving efficient operation without endoscopic guidance and surgical instrument intervention, reducing the operation time and difficulty, and at the same time reducing the discomfort of the patient.

[0019] 2. By pulling down the sleeve, the present invention enables the traction rope to slowly release the expansion wings of the uterine cavity stent, so that the uterine cavity stent unfolds at a controlled speed. Compared with the instantaneous elastic release after the traditional binding strap is cut, this structure reduces the kinetic energy of the unfolding and release of the uterine cavity stent, effectively avoiding mechanical damage to the inner wall of the uterine cavity caused by the rapid expansion of the cavity stent. In addition, with the cooperation of the soft rubber rack and the speed-reducing clamping seat, a resistance system is formed to increase the friction force and further reduce the unfolding speed of the uterine cavity stent.

[0020] 3. The structure of the present invention is simple and convenient for postoperative removal. After being pushed into the uterine cavity, the uterine cavity stent restores the shape of the uterine cavity structure. This structure can effectively prevent adhesion of the anterior and posterior walls, both side walls, and both uterine horns of the uterine cavity, and can play a role in draining the fluid in the uterine cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the structural schematic diagram of the present invention;

[0022] Figure 2 is the plan view of the stent body;

[0023] Figure 3 is the exploded schematic diagram of the stent body;

[0024] Figure 4 is Figure 3 the enlarged schematic diagram at A in

[0025] Figure 5 is the structural schematic diagram of the speed-reducing clamping seat;

[0026] Figure 6 is the structural schematic diagram of the push sleeve;

[0027] Figure 7 is the cross-sectional schematic diagram of the push sleeve;

[0028] Figure 8 is the schematic diagram of the wound state of the stent body;

[0029] Figure identification: 1- bracket body, 101- first fixed point, 102- second fixed point, 103- third fixed point, 2- fixed rod, 3- traction rope, 4- push sleeve, 401- sleeve part, 402- push-pull part, 5- first through hole, 6- second through hole, 7- guide groove, 8- soft rubber rack, 9- speed reduction seat, 10- soft rubber tooth, 11- raised dot, 12- scale mark, 13- holding handle, 14- pressing handle, 15- positioning block. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0031] Embodiment 1, as Figures 1-8 As shown, the disposable intrauterine stent disclosed in the present invention comprises a stent body 1 and a fixing rod 2, wherein the stent body 1 is made of elastic material, the stent body 1 is fixedly arranged at the top of the fixing rod 2, and further comprises a traction rope 3 and a push sleeve 4, the push sleeve 4 is slidably sleeved on the fixing rod 2, the push sleeve 4 comprises a sleeve portion 401 at the upper end and a push-pull portion 402 at the lower end, the inner cavity of the sleeve portion 401 is provided with a space for accommodating the rolled stent body 1, a first fixing point 101 is provided at the middle of the top end of the stent body 1, and the top two wings of the stent body 1 are divided into The second fixing point 102 and the third fixing point 103 for binding the traction rope 3 are respectively provided, the inner cavity of the stent body 1 is provided with a groove for the traction rope 3 to vertically penetrate, the first fixing point 101 is provided with a first through hole 5 connected with the groove, the bottom side wall of the stent body 1 is provided with a second through hole 6 connected with the groove, one end of the traction rope 3 is respectively tied and connected with the second fixing point 102 and the third fixing point 103, the other end of the traction rope 3 passes through the first through hole 5, the groove and the second through hole 6 in sequence, and is externally fixed to the inner side wall of the sleeve part 401. The overall thickness of the stent body 1 is less than 5mm, and it can easily enter the uterine cavity without dilation, which greatly reduces the difficulty of surgery and relieves the discomfort of patients.

[0032] A vertical guide groove 7 is provided in the channel, the upper end of the guide groove 7 is in communication with the first through hole 5, and the lower end of the guide groove 7 is in communication with the second through hole 6. Specifically, the traction rope 3 passes through the inner cavity of the stent body 1 to form a traction mechanism, and the stent body 1 can be rolled up and unfolded by sliding operation of the push sleeve 4 and limiting action of the second through hole 6, so that the stent body 1 can be easily put into the push sleeve 4 and the unfolding speed of the stent body 1 can be controlled to avoid mechanical damage to the inner wall of the uterine cavity.

[0033] A soft rubber rack 8 is provided on the inner groove wall of the guiding groove 7. A speed reduction clamping seat 9 adapted to be clamped with the soft rubber rack 8 is provided on the traction rope 3, and soft rubber teeth 10 are provided on both sides of the speed reduction clamping seat 9. Specifically, the soft rubber teeth 10 and the soft rubber rack 8 are mutually engaged. When the traction rope 3 is pulled, a relative displacement occurs between the speed reduction clamping seat 9 and the guiding groove 7. At this time, a resistance is generated between the soft rubber rack 8 and the soft rubber teeth 10. This resistance is less than the elastic potential energy of the bracket body 1 to restore to the planar state, ensuring that the bracket body 1 can fully restore to the flat state, but the restoration speed will be reduced due to the resistance. Through this structural design, it can ensure that during the process of the medical staff pulling the push sleeve 4, it can assist the medical staff in speed control and avoid mechanical damage to the inner wall of the uterine cavity caused by the rapid unfolding of the bracket body 1 due to an operation error (too fast pulling speed of the push sleeve 4).

[0034] The traction rope 3 is of a Y-shaped structure. The two end vertices of the traction rope 3 are respectively bundled and connected to the second fixed point 102 and the third fixed point 103. The lower end of the traction rope 3 passes through the guiding groove 7 and is fixedly connected to the sleeve part 401. Specifically, the first fixed point 101 is located between the second fixed point 102 and the third fixed point 103. After the traction rope 3 is bundled and fixed and passes through the first fixed point 101, through the pulling force on the traction rope 3, the second fixed point 102 and the third fixed point 103 move closer to the first fixed point 101, that is, the two wings of the bracket body 1 move closer to the center to form a wound state. In this state, it is convenient to put the bracket body 1 into the sleeve part 401, and the situation where the bracket body 1 cannot be put into the sleeve part 401 when it is in the unfolded state will not occur.

[0035] One end of the traction rope 3 is fixedly connected to the upper end of the inner wall of the sleeve part 401. Specifically, one end of the traction rope 3 is fixed to the upper end of the inner wall of the sleeve part 401, the other end is fixed to the second fixed point 102 and the third fixed point 103, and the middle section of the traction rope 3 is clamped at the second through hole 6. At this time, the traction rope 3 is in a V-shaped state. When the sleeve part 401 moves downward, that is, when the medical staff holds the push-pull part 402 and pulls it downward, the fixed end of the traction rope 3 and the push-pull part 402 approaches the second through hole 6. The other end of the traction rope 3 in the straightened state pulls the second fixed point 102 and the third fixed point 103. At this time, the bracket body 1 will also gradually be released from the wound state to the flat state. When the sleeve part 401 moves to the second through hole 6, the traction rope 3 changes from the V-shaped state to a straight line state, and the bracket body 1 is also in the unfolded flat state.

[0036] When the pushing sleeve 4 is completely sleeved on the stent body 1, the traction rope 3 is in a straightened state. When the pushing sleeve 4 is completely separated from the stent body 1, the stent body 1 is in a fully deployed state. Specifically, before pushing the stent body 1 into the uterine cavity, the stent body 1 needs to be wound and retracted into the pushing sleeve 4 for easy passage through the cervix guided by the pushing sleeve 4. After passing through the cervix, the stent body 1 needs to be deployed to support the uterine cavity. In the prior art, medical staff need to perform separate operations such as winding the stent body 1, placing it in the guiding pushing sleeve, observing the position through an endoscope, and cutting the binding rope binding the stent body 1 with surgical scissors. However, the solution of this application only needs to push the pushing sleeve 4 forward and backward to achieve the above operation steps, greatly improving the operation efficiency.

[0037] A number of raised dots 11 are provided on both sides of the stent body 1, and the raised dots 11 are equally spaced on the side wall of the stent body 1. Specifically, when the stent body 1 is deployed, the raised dots 11 contact the endometrium to form a micro-gap, providing mechanical support to prevent the anterior and posterior walls of the endometrium from adhering. In addition, a round hole is designed at the lower end of the stent body 1, and a drainage channel for discharging intrauterine effusion is provided inside the stent body 1 and the fixing rod 2. The inside of the round hole is communicated with the drainage channel of the fixing rod 2, and the provided raised dots 11 also facilitate the flow of intrauterine secretions through the gap, facilitating the discharge of intrauterine effusion and effectively reducing the risk of infection.

[0038] Scale marks 12 are provided on both the stent body 1 and the fixing rod 2, and the scale marks 12 are equally spaced along the outer side walls of the stent body 1 and the fixing rod 2. Specifically, the scale marks 12 on the stent body 1 facilitate medical staff to judge the depth of the stent entering the cervical os by observing the stent scale, and can judge the position of the stent body 1 in real time. Clinical trials show that this design controls the error between the top of the stent body 1 and the uterine fundus within ±2 mm, and improves the operation accuracy by 85% compared with blind insertion.

[0039] A holding handle 13 is provided at the bottom of the fixing rod 2. A pushing groove for the sliding connection of the fixing rod 2 is provided at the end of the holding handle 13, and an operation port for controlling the fixing rod 2 is also provided on the side wall of the holding handle 13. Specifically, when medical staff hold the holding handle 13, they can finely adjust the forward and backward movement of the fixing rod 2 by pushing the pressing handle 14 forward and backward with the thumb. If the fixing rod 2 and the holding handle 13 are integrally fixed, the forward and backward adjustment of the fixing rod 2 needs to be achieved by pushing the arm forward and backward, which requires a high stability of the arm. Without a stable fixed axis for support, it is not convenient to control the forward and backward fine adjustment. However, the solution of this application facilitates regarding the arm as a fixed axis and precisely controlling the forward and backward movement of the fixing rod 2 through the fine adjustment of the thumb, reducing the operation difficulty of medical staff.

[0040] A pressing handle 14 is provided at the bottom of the fixing rod 2. The pressing handle 14 is arranged on the operation opening, and anti-slip gaskets are provided on the side walls of both the pressing handle 14 and the pushing and pulling part 402. Specifically, diamond-shaped convex textures with a certain depth are provided on the surfaces of the anti-slip gaskets of the pressing handle 14 and the pushing and pulling part 402. When medical staff operate while wearing latex gloves, the friction coefficient between the gasket and the gloves can reach 0.8 - 1.2, ensuring stable force application even in an environment contaminated by intrauterine secretions.

[0041] Embodiment 2: Based on Embodiment 1, this embodiment proposes an optimized structure of the disposable intrauterine stent.

[0042] A limit clamping point is further provided at the upper end of the fixing rod 2. The position of the limit clamping point is at the separation position where the pushing sleeve 4 just separates from the stent body 1. When the pushing sleeve 4 is stuck on the limit clamping point, the sleeve part 401 is at the cervix. In the prior art, after the stent body 1 is implanted, liquid substances such as anti-adhesion glue and anti-inflammatory drugs are injected through a catheter to prevent re-adhesion of the wound surface. Conventional techniques will set a cervical airbag tube at the upper end of the fixing rod 2. By inflating the cervical airbag tube, the drugs injected into the uterine cavity can be prevented from flowing out. Corresponding to the solution of this application, corresponding liquid substances can be injected into the uterine cavity through the drainage channel, and the pushing sleeve 4 can be regarded as the cervical airbag tube to block the cervix, prevent the drugs injected into the uterine cavity from flowing out, and can also effectively avoid adhesion of the cervical os. The limit clamping point is similar to the cooperation relationship between a conventional clamping groove and a clamping buckle, which can be locked by moving to a fixed position and released by pressing. Since this design is a common technical means well-known to those skilled in the art and this technology is not the core technical feature of this application, the specific structure is not described in detail here.

[0043] In addition, a positioning block 15 is provided at one end of the fixing rod 2 close to the holding handle 13. The positioning block 15 is used to position the insertion depth of the fixing rod 2. When the maximum moving distance is reached, it cannot be pushed further to ensure that no harm is caused to the patient due to the operation error of medical staff.

[0044] Embodiment 3: Based on Embodiment 1, this embodiment proposes the specific working principle of the disposable intrauterine stent.

[0045] The specific implementation principle process is as follows:

[0046] Fix the upper ends of the traction ropes 3 to the second fixed point 102 and the third fixed point 103 respectively, and wind the bracket body 1 into the sleeve part 401 of the push sleeve 4. At this time, the traction ropes 3 are in a straightened state. Observe the scale markings 12 on the fixed rod 2 and preset the moving distance of the push sleeve 4 according to the depth of the patient's uterine cavity. After inserting it into the uterine cavity through the cervix, pause every 5 mm to confirm the position (to avoid touching the uterine fundus). When the bracket body 1 completely enters the uterine cavity and the scale shows a depth of about 7-9 cm, pause the pushing operation. The medical staff slowly pull down the push-pull part 402 (the push-pull part 402 is outside the patient's body), and the push sleeve 4 moves down along the fixed rod 2. When the traction ropes 3 move, the two wings of the bracket are symmetrically unfolded to both sides through the Y-shaped traction ropes 3. When the push sleeve 4 moves down to the limit clamping point, the tension of the traction ropes 3 returns to zero, and the bracket body 1 resumes the preset uterine shape structure, and the convex dots 11 form a micro-gap with the endometrium. After the push sleeve 4 is stuck into the limit clamping point, anti-adhesion gel or medicine can be injected through the drainage channel in the fixed rod 2. The sleeve part 401 of the push sleeve 4 forms a physical barrier at the cervix to prevent the liquid medicine from flowing out. During the process of placing the bracket body 1 in the patient's body, the fixed rod 2 can be tied to the side of the patient's leg to facilitate the patient's daily activities.

[0047] When it needs to be removed after the operation, hold the holding handle 13 and push the push sleeve 4 backward. The traction ropes 3 are tightened again. The traction ropes 3 pull the two wings of the bracket body 1 to roll inwards, so that the bracket body 1 rolls up and is synchronously received into the push sleeve 4. After the bracket body 1 is completely received into the push sleeve 4, pull out the fixed rod 2 and take it out completely through the cervix.

[0048] Certainly, the present invention can also have many other implementation manners. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. Disposable intrauterine stent, comprising a stent body (1) and a fixing rod (2), the stent body (1) is made of an elastic material, the stent body (1) is fixedly arranged at the top end of the fixing rod (2), and it is characterized in that: It also includes a traction rope (3) and a pushing sleeve (4). The pushing sleeve (4) is slidably sleeved on the fixed rod (2). The pushing sleeve (4) includes a sleeve part (401) at the upper end and a pushing and pulling part (402) at the lower end. The inner cavity of the sleeve part (401) is provided with a space for accommodating the retracted bracket body (1). The middle of the top end of the bracket body (1) is provided with a first fixing point (101). The two wings at the top end of the bracket body (1) are respectively provided with a second fixing point (102) and a third fixing point (103) for tying the traction rope (3). A channel for the traction rope (3) to vertically penetrate is provided in the inner cavity of the bracket body (1). A first through hole (5) communicating with the channel is provided on the first fixing point (101). A second through hole (6) communicating with the channel is provided on the side wall at the bottom end of the bracket body (1). One end of the traction rope (3) is respectively tied and connected to the second fixing point (102) and the third fixing point (103). The other end of the traction rope (3) sequentially passes through the first through hole (5), the channel and the second through hole (6), and is externally fixed to the inner side wall of the sleeve part (401). When the pushing sleeve (4) is completely sleeved on the bracket body (1), the traction rope (3) is in a straightened state. When the pushing sleeve (4) is completely separated from the bracket body (1), the bracket body (1) is in a fully unfolded state.

2. The disposable intrauterine stent according to claim 1, wherein: A vertical guiding groove (7) is provided in the channel. The upper end of the vertical guiding groove communicates with the first through hole (5), and the lower end of the vertical guiding groove communicates with the second through hole (6).

3. The disposable intrauterine stent according to claim 2, wherein: Soft rubber racks (8) are provided on the inner groove wall of the guiding groove (7). A speed reduction clamping seat (9) adapted to be clamped with the soft rubber racks (8) is provided on the traction rope (3). Soft rubber teeth (10) are provided on both sides of the speed reduction clamping seat (9).

4. The disposable intrauterine stent according to claim 3, wherein: The traction rope (3) is of a Y-shaped structure. The two end vertices of the traction rope (3) are respectively tied and connected to the second fixing point (102) and the third fixing point (103). The lower end of the traction rope (3) passes through the guiding groove (7) and is fixedly connected to the sleeve part (401).

5. The disposable intrauterine stent according to claim 4, wherein: One end of the traction rope (3) is fixedly connected to the upper end of the inner wall of the sleeve part (401).

6. The disposable intrauterine stent according to claim 1, wherein: A number of raised dots (11) are provided on both sides of the bracket body (1). The raised dots (11) are equally spaced on the side wall of the bracket body (1).

7. The disposable intrauterine stent according to claim 1, wherein: Scale marks (12) are provided on both the bracket body (1) and the fixed rod (2). The scale marks (12) are equally spaced along the outer side walls of the bracket body (1) and the fixed rod (2).

8. The disposable intrauterine stent according to claim 1, wherein: A holding handle (13) is provided at the bottom of the fixed rod (2). A pushing groove for the sliding connection of the fixed rod (2) is provided at the end of the holding handle (13). An operation port for controlling the fixed rod (2) is further provided on the side wall of the holding handle (13).

9. The disposable intrauterine stent according to claim 8, wherein: A pressing handle (14) is provided at the bottom of the fixed rod (2). The pressing handle (14) is provided on the operation port. Anti-slip gaskets are provided on the side walls of both the pressing handle (14) and the pushing and pulling part (402).

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