A device for pushing up the amniotic sac in a cerclage

Abstract

The application relates to the technical field of medical devices, and discloses an amniotic sac pushing-up device used in cervical cerclage, which comprises a main shaft, a visual camera arranged at the front end of the main shaft, a contact film, a movable ring slidably sleeved outside the main shaft, an operating rod connected with the movable ring and used for driving the movable ring to slide along the axial direction of the main shaft, and a plurality of lifting skeletons, one end of each of the plurality of lifting skeletons is rotationally connected with the outer periphery of the front end of the main shaft, and the other end of each of the plurality of lifting skeletons is connected with the inner surface of the contact film. The visual camera is arranged at the front end of the main shaft and is used for acquiring real-time images in the narrow operation field of the vagina and the cervical canal, compared with the traditional catheter, the problem that the insertion depth cannot be quantified due to blind exploration is solved, the operator can intuitively confirm the specific positions of the internal orifice of the cervix and the amniotic sac, and the risks of accidental touch and rupture of the fetal membrane caused by blind exploration are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device for pushing up the amniotic sac during cervical cerclage. Background Technology

[0002] In obstetrics, cervical insufficiency during pregnancy refers to the shortening of the cervical canal and dilation of the cervix in the mid-to-late stages of pregnancy, with or without amniotic sac prolapse or rupture, due to cervical anatomical or functional defects in the absence of uterine contractions. This condition is one of the main causes of recurrent mid-pregnancy miscarriage and premature birth, and is also a significant cause of neonatal death. During emergency cervical cerclage, it is common to encounter cases where the amniotic sac is wedged into the cervical canal; in severe cases, the amniotic sac may even prolapse through the cervical os and enter the vagina. Therefore, before performing cervical cerclage, the protruding amniotic sac must be repositioned back into the uterine cavity.

[0003] Currently, there is no standardized amniotic sac repositioning device in obstetric clinical practice. Commonly used alternative methods include the head-down, hip-up position, bladder filling, amniocentesis to reduce amniotic fluid volume, and the use of Foley catheter balloons, sponge rods, or moistened gauze balls for repositioning. For patients with severe amniotic sac protrusion from the external cervical os, repositioning using existing tools and methods is difficult and has a low success rate.

[0004] In particular, the use of Foley catheters as a push-up tool in some hospitals presents significant structural defects. Due to the narrow surgical field inside the vagina, operators cannot visually determine the exact depth of insertion into the internal cervical os when inserting the catheter, relying mainly on blind exploration. Simultaneously, the volume of saline injected into the balloon cannot be accurately quantified, leading to uneven upward thrust on the amniotic sac after balloon inflation. During blind insertion and inflation, uncontrolled pressure can easily cause rupture of the amniotic membrane, resulting in surgical failure and increasing the rates of miscarriage and premature birth. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device for pushing up the amniotic sac during cervical cerclage, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for pushing up an amniotic sac during cervical cerclage, comprising: spindle; A vision camera is mounted at the front end of the main shaft; Contact membrane; The movable ring is slidably sleeved on the outside of the main shaft; An operating lever, connected to the movable ring, is used to drive the movable ring to slide along the axial direction of the main shaft; The support frame is provided in multiple ways. One end of each of the multiple support frames is rotatably connected to the outer periphery of the front end of the main shaft, and the other end of each of the multiple support frames is connected to the inner surface of the contact membrane. The driving frame is provided in multiple ways. One end of each driving frame is rotatably connected to the movable ring, and the other end of each driving frame is rotatably connected to the corresponding lifting frame.

[0007] Preferably, the outer side wall of the movable ring is provided with an assembly groove, and the front end of the operating rod is provided with a ball joint. The ball joint is engaged in the assembly groove and can rotate relative to it, so that the operating rod can drive the movable ring to move.

[0008] Preferably, the end of the operating lever away from the movable ring is provided with a pull ring, which is used by the operator to pass through to drive the operating lever.

[0009] Preferably, when the movable ring is driven by the operating lever to slide towards the front end of the main shaft, the driving frame pushes the lifting frame to deflect away from the axis of the main shaft and supports the radial expansion of the contact membrane.

[0010] Preferably, the plane where the multiple lifting frames and the rotatable connection points of the front end of the main shaft are located is behind the vision camera.

[0011] Preferably, the contact film is an integrally formed film structure, the contact film extends from the front end of the main shaft to cover the outside of the movable ring, and the visual camera is not covered by the contact film.

[0012] Preferably, the contact film includes a first film, a second film, and a third film. The first film wraps around the outer periphery of the plurality of supporting frames, the second film wraps around the outer periphery of the plurality of driving frames, and the third film covers the joint between the first film and the second film.

[0013] Preferably, the contact film is made of a flexible material, and the outer surface of the contact film is a smooth surface.

[0014] Preferably, the lens of the visual camera is oriented directly in front of the main axis extending direction to acquire images.

[0015] Preferably, the outer surface of the end of the spindle away from the vision camera is provided with an anti-slip texture to provide grip friction.

[0016] This invention provides a device for pushing up the amniotic sac during cervical cerclage. It has the following beneficial effects: 1. The present invention has a visual camera set at the front end of the main shaft to acquire images in real time in the narrow surgical field of the vagina and cervical canal. Compared with the problem of the inability to quantify the insertion depth due to blind probing of traditional catheters, this structure allows the operator to intuitively confirm the specific location of the internal cervical os and amniotic sac, realize precise control of the insertion depth, and effectively avoid the risk of accidental contact and rupture of the amniotic sac caused by blind probing.

[0017] 2. This invention drives the movable ring to slide via an operating lever, and uses the driving frame to drive the lifting frame to deflect, thereby supporting the slow expansion of the contact membrane and maintaining its fixed shape. This mechanical linkage structure replaces the uncontrollable expansion of the traditional balloon with a structured planar support, so that the contact membrane can apply a uniform and controllable upward thrust to the amniotic sac after it expands. This overcomes the defects of the traditional method, such as the inability to quantify the amount of water injected and uneven force causing membrane rupture, and improves the success rate of amniotic sac repositioning and cervical cerclage surgery.

[0018] 3. This invention uses a contact membrane made of a smooth, flexible material and wraps the entire contact membrane around the outside of the internal skeleton structure. The smooth membrane not only eliminates the sharp edges of the device surface, preventing scratches on the fragile amniotic sac during the upward push, but also isolates the mechanical skeleton, preventing cervical tissue from being pinched when the device is withdrawn after circumcision and suturing. This reduces the risk of infection and ensures the safety of the entire surgical process. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram illustrating the structure of the spindle end of the present invention; Figure 4 A schematic diagram illustrating the skeletal morphology of the present invention in its contracted state; Figure 5 This is a diagram illustrating the transitional phase of the present invention. Figure 6 A schematic diagram illustrating the skeletal state during the transition phase of the present invention; Figure 7 This is a schematic diagram illustrating the usage state of the present invention; Figure 8 A schematic diagram of the skeleton state to highlight the use state of the present invention.

[0020] The components include: 1. main shaft; 2. movable ring; 3. assembly groove; 4. ball joint; 5. operating lever; 6. pull ring; 7. contact membrane; 8. vision camera; 9. drive frame; and 10. support frame. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 - Appendix Figure 8 This invention provides a device for pushing up the amniotic sac during cervical cerclage, comprising a main shaft 1, a movable ring 2, an assembly groove 3, a ball joint 4, an operating rod 5, a pull ring 6, a contact membrane 7, a visual camera 8, a drive frame 9, and a lifting frame 10.

[0023] The main shaft 1 has a long rod-shaped structure and serves as the supporting skeleton of the entire device. The outer surface of the end of the main shaft 1 away from the visual camera 8 is provided with anti-slip texture to provide sufficient friction when the operator holds the main shaft 1 and prevent the device from slipping during the operation.

[0024] The visual camera 8 is located at the front end of the main shaft 1, with its lens facing directly in the direction of extension of the main shaft 1. Through the visual camera 8, the operator can obtain real-time images of the front within the narrow vagina and cervical canal, accurately observe the specific location of the internal cervical os and amniotic sac, and achieve visual operation.

[0025] The movable ring 2 is slidably sleeved on the outside of the main shaft 1. The movable ring 2 can reciprocate along the axial direction of the main shaft 1. The operating rod 5 is located on one side of the main shaft 1 and connected to the movable ring 2. The end of the operating rod 5 away from the movable ring 2 is provided with a pull ring 6. The pull ring 6 is used for the operator's fingers to pass through. The operator applies a pushing or pulling force along the axial direction of the main shaft 1 to the operating rod 5 through the pull ring 6, thereby driving the movable ring 2 to move along the main shaft 1.

[0026] In the connection structure between the movable ring 2 and the operating rod 5, the outer wall of the movable ring 2 is provided with an assembly groove 3, and the front end of the operating rod 5 is provided with a ball joint 4. The ball joint 4 is engaged in the assembly groove 3, and the ball joint 4 and the assembly groove 3 can rotate relative to each other. This structure allows the operating rod 5 to deflect at a certain angle when pushing or pulling the movable ring 2 to move, preventing jamming during operation.

[0027] Multiple support frames 10 are provided, and the multiple support frames 10 are evenly distributed around the outer periphery of the main shaft 1. One end of each of the multiple support frames 10 is rotatably connected to the outer periphery of the front end of the main shaft 1. The rotatable connection points of the multiple support frames 10 and the outer periphery of the front end of the main shaft 1 are located on the same arc surface. This connection plane is located on the outer periphery of the side of the vision camera 8. This layout ensures that the support frames 10 and the vision camera 8 are not on the same plane during movement, thus avoiding the support frames 10 from obstructing the frontal view of the vision camera 8. The other end of each of the multiple support frames 10 is connected to the inner surface of the contact membrane 7 to support the contact membrane 7 from the inside.

[0028] Multiple drive frames 9 are provided. One end of each drive frame 9 is rotatably connected to the movable ring 2, and the other end of each drive frame 9 is rotatably connected to the middle section of the corresponding lifting frame 10.

[0029] When the operator pushes the operating lever 5 forward using the pull ring 6, the operating lever 5 drives the movable ring 2 to slide towards the front end of the main shaft 1. During the sliding process, the movable ring 2 pushes multiple drive frames 9 forward, and the drive frames 9 apply force to the front end, pushing the lifting frame 10 to rotate around its connection point with the main shaft 1. The lifting frame 10 deflects away from the axis of the main shaft 1, and the multiple lifting frames 10 as a whole radially expand, thereby supporting the radial expansion of the contact membrane 7. Conversely, when the operator pulls the operating lever 5 backward, the movable ring 2 slides backward and pulls the drive frame 9, causing the lifting frame 10 to move closer to the axis of the main shaft 1, so that the contact membrane 7 contracts and resets.

[0030] The contact membrane 7 is made of flexible material. The outer surface of the contact membrane 7 is smooth. The smooth surface can reduce the friction between the device and the surface of human tissue and prevent damage to the amniotic sac and surrounding tissues during the radial expansion and contraction of the contact membrane 7. The contact membrane 7 is wrapped around the outside of multiple lifting skeletons 10 and driving skeletons 9, isolating the internal mechanical skeleton structure from human tissue.

[0031] In one specific embodiment of the present invention, the contact film 7 is an integrally formed film structure. The contact film 7 extends backward from the front end of the main shaft 1 and covers the outside of the movable ring 2. The front end of the contact film 7 avoids the arrangement area of ​​the visual camera 8, so that the visual camera 8 is not covered by the contact film 7, ensuring direct entry of light and field of view.

[0032] In another specific embodiment of the present invention, the contact membrane 7 is composed of multiple membrane segments spliced ​​together. The contact membrane 7 includes a first cover, a second cover and a third cover. The first cover wraps around the outer periphery of the area where multiple support frames 10 are located, the second cover wraps around the outer periphery of the area where multiple drive frames 9 are located, and the third cover covers the splice between the first cover and the second cover, thereby completing the connection and sealing of the covers in each area.

[0033] In practical use, the operator holds the anti-slip textured area at the rear end of the main shaft 1, keeping the operating rod 5 in a backward-stretched state. At this time, the supporting frame 10 and the contact membrane 7 are in a contracted state. This state requires the connection between the two frames to be arc-shaped to avoid the frames directly sticking to the outside of the main shaft 1, which would make subsequent unfolding difficult. The front end of the device is slowly inserted into the cervix, and the internal situation is observed through the image transmitted back by the visual camera 8. When the front end of the device reaches below the internal os of the cervix, the operator pushes the operating rod 5. The operating rod 5 drives the movable ring 2 forward, driving the frame 9 to push the supporting frame 10 outward. The contact membrane 7 slowly unfolds under the support of the supporting frame 10. After unfolding, the contact membrane 7 forms a large smooth contact surface. Then, the operator pushes the main shaft 1 forward as a whole, using the uniform force surface provided by the contact membrane 7 to push the amniotic sac protruding from the external os of the cervix. After the amniotic sac is returned to the uterine cavity, the doctor sutures at the connection between the cervix and the vagina. Before suturing and knotting, the operator pulls the operating rod 5 backward to contract the contact membrane 7 and the internal frame, and finally withdraws the device.

[0034] Working principle: Before the device is inserted into the human body, the operator pulls the operating rod 5 backward through the pull ring 6. The operating rod 5 drives the movable ring 2 to slide along the main shaft 1 away from the visual camera 8. At this time, the drive frame 9 moves closer to the main shaft 1, causing the lifting frame 10 to contract, so that the contact membrane 7 covering the outside of the frame is in a contracted state. The operator holds the anti-slip textured area at the rear end of the main shaft 1 and slowly inserts the front end of the device into the cervical canal. During the insertion process, the visual camera 8 at the front end of the main shaft 1 collects images from the front in real time, assisting the operator in confirming the specific location of the internal cervical os and the amniotic sac, thus achieving precise positioning.

[0035] When the device reaches the position below the internal cervical os to be lifted, the operator pushes the operating rod 5 forward through the pull ring 6. The ball joint 4 at the front end of the operating rod 5 rotates relative to the assembly groove 3 and transmits axial thrust, driving the movable ring 2 to slide forward along the main shaft 1. The forward movement of the movable ring 2 drives multiple drive frames 9 to move forward. The drive frames 9 push the lifting frames 10 outward, causing the multiple lifting frames 10 to deflect away from the axis of the main shaft 1 around their connection point with the outer periphery of the front end of the main shaft 1. As the lifting frames 10 deflect and unfold, the contact membrane 7 connected to the inner side of the lifting frames 10 expands radially, forming a support surface at the front end of the device. The operator pushes the main shaft 1 forward as a whole. The expanded contact membrane 7 contacts the amniotic sac and applies a uniform upward thrust to the amniotic sac, smoothly repositioning the wedge-in-the-cervical canal or the bulging amniotic sac back into the uterine cavity.

[0036] After the amniotic sac is repositioned and the cervical cerclage is sutured, the operator pulls the operating rod 5 backward through the pull ring 6 again. The movable ring 2 slides backward under force and pulls the drive frame 9 to reposition. The drive frame 9 drives the lifting frame 10 to retract towards the main shaft 1, so that the contact membrane 7 returns to its initial contracted state. After confirming that the frame and the contact membrane 7 are completely retracted, the operator pulls the main shaft 1 backward, so that the entire device is smoothly withdrawn from the cervical canal and vagina.

Claims

1. A device for pushing up an amniotic sac during cervical cerclage, characterized in that, include: Main spindle (1); A visual camera (8) is disposed at the front end of the main shaft (1); Contact membrane (7); The movable ring (2) is slidably sleeved on the outside of the main shaft (1); The operating lever (5) is connected to the movable ring (2) and is used to drive the movable ring (2) to slide along the axial direction of the main shaft (1); The lifting frame (10) is provided in multiple ways. One end of each of the multiple lifting frames (10) is rotatably connected to the outer periphery of the front end of the main shaft (1), and the other end of each of the multiple lifting frames (10) is connected to the inner surface of the contact film (7). The driving frame (9) is provided in multiple ways. One end of each driving frame (9) is rotatably connected to the movable ring (2), and the other end of each driving frame (9) is rotatably connected to the corresponding lifting frame (10).

2. The amniotic sac pushing device for cervical cerclage as described in claim 1, characterized in that, The outer wall of the movable ring (2) is provided with an assembly groove (3), and the front end of the operating rod (5) is provided with a ball joint (4). The ball joint (4) is engaged in the assembly groove (3) and can rotate relative to it, so that the operating rod (5) can drive the movable ring (2) to move.

3. The amniotic sac pushing device for cervical cerclage as described in claim 1, characterized in that, The operating lever (5) has a pull ring (6) at one end away from the movable ring (2), and the pull ring (6) is used for the operator to pass through to drive the operating lever (5).

4. The amniotic sac pushing device for cervical cerclage as described in claim 1, characterized in that, When the movable ring (2) is driven by the operating lever (5) to slide towards the front end of the main shaft (1), the driving frame (9) pushes the lifting frame (10) to deflect away from the axis of the main shaft (1) and supports the radial expansion of the contact membrane (7).

5. The amniotic sac pushing device for cervical cerclage as described in claim 1, characterized in that, The plane where the multiple lifting frames (10) and the rotating connection points of the front end of the main shaft (1) are located is behind the visual camera (8).

6. The amniotic sac pushing device for cervical cerclage according to claim 1, characterized in that, The contact membrane (7) is an integrally formed membrane structure. The contact membrane (7) extends from the front end of the main shaft (1) to cover the outside of the movable ring (2), and the visual camera (8) is not covered by the contact membrane (7).

7. The amniotic sac pushing device for cervical cerclage according to claim 1, characterized in that, The contact film (7) includes a first film, a second film and a third film. The first film wraps around the outer periphery of the plurality of lifting frames (10), the second film wraps around the outer periphery of the plurality of driving frames (9), and the third film covers the joint between the first film and the second film.

8. The amniotic sac pushing device for cervical cerclage according to claim 1, characterized in that, The contact membrane (7) is made of a flexible material, and the outer surface of the contact membrane (7) is a smooth surface.

9. The amniotic sac pushing device for cervical cerclage according to claim 1, characterized in that, The lens of the visual camera (8) faces directly in front of the main axis (1) in the direction of its extension, and is used to acquire images.

10. The amniotic sac pushing device for cervical cerclage according to claim 1, characterized in that, The outer surface of the end of the spindle (1) away from the vision camera (8) is provided with anti-slip texture to provide grip friction.

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