Disposable cervical dilatation balloon catheter and assembling method thereof

Abstract

The invention belongs to the technical field of medical instruments, particularly relates to a disposable cervical dilatation balloon catheter and an assembling method thereof, and aims to solve the problem that when an existing disposable cervical dilatation balloon catheter is used for dilating the cervix of a puerpera, a large space is still reserved between a uterus balloon and a vagina balloon on the catheter after normal saline is injected into the uterus balloon and the vagina balloon for dilation, and the uterus balloon and the vagina balloon cannot be used for dilating the cervix of the puerpera. In order to solve the problem that the mature state of the cervix uterus and the success rate of labor induction are affected due to incomplete expansion of the cervix uterus of a lying-in woman, the following scheme is provided: the device comprises an outer catheter, and a vagina balloon and a uterus balloon are arranged outside the outer catheter. According to the disposable cervical dilation balloon catheter and the assembling method thereof, the disposable cervical dilation balloon catheter can fully dilate the cervix of a puerpera during labor induction, so that the size of a gap between the vagina balloon and the uterus balloon after dilation is reduced, and the cervix of the puerpera reaches a completely dilated mature state; the labor induction success rate of the puerpera is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a disposable cervical dilation balloon catheter and an assembling method thereof. Background Art

[0002] The cervical dilation balloon catheter is a gynecological induction tool. It is a non-drug midwifery device. For parturients, it can make the cervix reach a mature state more naturally and safely. The dilation and maturation of the cervix is ​​achieved by the balloon providing a long-lasting and gentle dilation force at the internal and external openings of the cervix, which greatly improves the success rate of induced labor.

[0003] When the existing disposable cervical dilation balloon catheter dilates the cervix of a parturient, there is still a large space between the uterine balloon and the vaginal balloon on the catheter after they are expanded by injecting normal saline, which often leads to incomplete dilation of the parturient's cervix, thereby affecting the maturity of the cervix and the success rate of induced labor. Summary of the invention

[0004] The invention discloses a disposable cervical dilatation balloon catheter and an assembly method thereof, aiming to solve the technical problem in the background art that the space between balloons on the disposable cervical dilatation balloon catheter is relatively large after expansion.

[0005] The present invention provides a disposable cervical dilatation balloon catheter, comprising an outer catheter, wherein a vaginal balloon and a uterine balloon are arranged on the outside of the outer catheter, a filling balloon is arranged on the side of the uterine balloon close to the vaginal balloon, the filling balloon is located outside the outer catheter, and a fine hole is opened on the outer catheter, an infusion tube 2 is bonded in the fine hole of the outer catheter, a three-way joint is inserted at one end of the outer catheter away from the uterine balloon, a uterine filling joint and a vaginal filling joint are arranged at two ends of the three-way joint away from the outer catheter, an end of the infusion tube 2 away from the vaginal balloon is located in the vaginal filling joint, an infusion tube 1 is arranged in the outer catheter, one end of the infusion tube 1 and the uterine balloon are located on the same plane, and the infusion tube 1 and the infusion tube 2 are connected to each other. A valve is provided at the end of tube 2 away from the outer catheter, a sleeve is provided on the outside of infusion tube 1, a space filling module is provided in the sleeve, and a manifold is provided on the outer catheter, and a winding module is provided at the end of the manifold away from the outer catheter, the space filling module includes an annular water-filling seat, the annular water-filling seat is located on the outside of infusion tube 1, the outside of the annular water-filling seat is slidably connected to the inner wall of the sleeve, the inner wall of the sleeve is fixedly connected with a stop ring, the stop ring is located on the side of the annular water-filling seat close to the filling balloon, and four liquid outlet holes equidistantly distributed around the circumference are provided on the outer catheter, the liquid outlet holes are all located on the side of the annular water-filling seat away from the filling balloon, and four injection holes equidistantly distributed around the circumference are provided on the sleeve and the outer catheter.

[0006] By providing an external catheter, a vaginal balloon, a uterine balloon, a filling balloon, a three-way joint, a space filling module, a winding module, a uterine filling joint and a vaginal filling joint, the device uses the space filling module to enable the disposable cervical dilation balloon catheter to fully dilate the cervix of the parturient during induction of labor, thereby reducing the size of the gap between the vaginal balloon and the uterine balloon after expansion, allowing the parturient's cervix to reach a fully dilated mature state, and improving the success rate of induction of labor for the parturient.

[0007] In a preferred embodiment, the outside of the infusion tube 1 is fixedly connected to a ring-shaped part, the outside of the ring-shaped part is slidably connected to the inner wall of the annular water-blocking seat, an annular groove is provided on the ring-shaped part, the inner wall of the annular groove is fixedly connected to a closed bag, and drainage ports are provided on the ring-shaped part and the infusion tube 1, and the drainage ports are located on the same plane as the closed bag; the ring-shaped part and the closed bag are provided with narrow openings on the side away from the annular water-blocking seat, a shunt tube is fixedly connected to the narrow opening, one end of the shunt tube is connected to the closed bag, and the other end passes through the outside of the infusion tube 1 into the infusion tube 1, and a water-blocking plate is fixedly connected to the inner wall of the infusion tube 1, and the water-blocking plate is located at the drainage port. Between the port and the shunt tube, and on the side of the annular water-blocking seat close to the filling balloon, three circumferentially equidistantly distributed grooves are provided, and a retaining piece is slidably connected in the groove; the retaining piece is fixedly connected with a short shaft on the side away from the annular water-blocking seat, and the side of the retaining piece close to the annular water-blocking seat is clamped with the side of the annular piece away from the closed bag, and a rotating frame is provided on the outside of the infusion tube, the outside of the rotating frame is slidably connected to the inner wall of the sleeve, and the rotating frame is movably connected to the side opposite to the annular water-blocking seat; the rotating frame is provided with three circumferentially equidistantly distributed curved grooves, and the inner walls of the three curved grooves are respectively slidably connected to the outside of the three short shafts, and the inner wall of the rotating frame A coil spring is fixedly connected to the wall, and one end of the coil spring away from the rotating frame is fixedly connected to the side of the annular water-blocking seat close to the rotating frame, and a mounting seat is slidably connected to the inner wall of the sleeve, and the mounting seat is slidably connected to the side opposite to the rotating frame. An annular opening is provided on the outside of the mounting seat, and a sealing ring is provided in the annular opening. The outside of the sealing ring fits with the inner wall of the sleeve, and a U-shaped groove is provided on the side of the mounting seat away from the annular water-blocking seat. Two symmetrical insertion ports are provided on the inner wall of the sleeve, and the insertion ports are connected to the U-shaped groove; two symmetrical fixing pins are slidably connected in the U-shaped groove, and one end of the two fixing pins are respectively clamped with the inner walls of the two insertion ports, and the two fixing pins are respectively clamped with the inner walls of the two insertion ports. The pin is fixedly connected to one end away from the insertion port with a thin wire, which is located in the U-shaped groove. The outside of the thin wire is slidably connected to two symmetrical connecting parts, the outsides of the two connecting parts are fixedly connected to the inner wall of the U-shaped groove, and the outside of the thin wire is surrounded by two symmetrical springs, one end of the two springs is respectively fixedly connected to the outside of the fixed pin on the same side, and the other ends are respectively fixedly connected to the outside of the connecting parts on the same side. The outside of the thin wire is fixedly connected to a pull rope, and a covering plate is provided on the outside of the pull rope. The side of the covering plate close to the mounting seat is fixedly connected to the outside of the U-shaped groove, and the end of the pull rope away from the mounting seat enters the manifold along the inside of the outer conduit.

[0008] By providing a space filling module, the space filling module utilizes an annular water-blocking seat and a mounting seat so that the device can be quickly and conveniently adjusted according to the thickness of the cervix when dilating the cervix of a parturient, thereby avoiding the need to replace catheters of different sizes between different parturients and improving the applicability of the device.

[0009] In a preferred embodiment, the winding module includes a accommodating frame, a circular opening is provided on a side of the accommodating frame close to the manifold, the inner wall of the circular opening is fixedly connected to the outside of the manifold, a notch is provided on the accommodating frame, a wire winding roller is movably connected in the notch, the outside of the wire winding roller is fixedly connected to the end of the pull rope away from the outer guide tube, and the outside of the wire winding roller is fixedly connected to a circular shaft; the outside of the circular shaft is fixedly connected to an external toothed ring, a locking ring is provided on the outside of the external toothed ring, the locking ring is slidably connected to the side opposite to the accommodating frame, and the outside of the locking ring is slidably connected to a fastener, the fastener is fixedly connected to the side opposite to the accommodating frame, the inner wall of the locking ring is fixedly connected to an arc-shaped rack, and the arc-shaped rack is clamped with the external toothed ring; the side of the fastener away from the circular shaft is fixedly connected to spring 2, the end of the spring 2 away from the fastener is fixedly connected to the inner wall of the locking ring, and the side of the circular shaft away from the wire winding roller is fixedly connected to a knob.

[0010] By providing a winding module, the winding module uses an external tooth ring and an arc-shaped rack to enable the device to achieve a self-locking effect on the winding roller, thereby reducing accidental touching of the pull rope during the use of the catheter, which may affect the dilation effect of the catheter on the mother's cervix and even cause discomfort to the mother.

[0011] A method for assembling a disposable cervical dilatation balloon catheter, using the disposable cervical dilatation balloon catheter as described above, comprises the following steps: Step 1: Before using the disposable cervical dilation balloon catheter for dilation, insert one end of the infusion tube 1 with the ring into the outer catheter and make the ring enter the ring water-proof seat to fix it, put the ends of the infusion tube 1 and the infusion tube 2 away from the outer catheter into the uterine filling connector and the vaginal filling connector connected to the three-way connector and fix them, and put the cervical dilation balloon catheter into the cervix so that the two balloons can pass through the cervix evenly; Step 2, insert the syringe into the uterine filling connector and inject normal saline, the normal saline enters the uterine balloon through infusion tube 1 to fill the uterine balloon, and then pulls the balloon back and close to the cervix. At this time, the vaginal balloon is located at the external opening of the cervix, and then uses a syringe to insert it into the vaginal filling connector, and normal saline enters the vaginal balloon through infusion tube 2 to fill the vaginal balloon. When the distance between the filled vaginal balloon and the uterine balloon is large, use the winding module to wind up the pull rope, so that the space filling module drives the infusion tube 1 that injects normal saline into the uterine balloon to contract in the external catheter and inject normal saline into the filling balloon to fill the filling balloon, so that the filling balloon expands, and then fills the distance between the vaginal balloon and the uterine balloon.

[0012] From the above, it can be seen that the disposable cervical dilation balloon catheter provided by the present invention can fully dilate the cervix of the parturient during induction of labor, thereby reducing the gap size between the vaginal balloon and the uterine balloon after expansion, allowing the parturient's cervix to reach a fully dilated mature state, thereby improving the success rate of induction of labor for the parturient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a disposable cervical dilatation balloon catheter proposed by the present invention; Figure 2 A schematic cross-sectional view of a disposable cervical dilatation balloon catheter proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a space filling module of a disposable cervical dilatation balloon catheter proposed by the present invention; Figure 4 This is a schematic diagram of the structure of an annular water-blocking seat and annular member of a disposable cervical dilatation balloon catheter proposed by the present invention; Figure 5 This is a schematic diagram of the structure of a mounting base of a disposable cervical dilatation balloon catheter proposed by the present invention; Figure 6 This is a schematic structural diagram of a reeling module of a disposable cervical dilatation balloon catheter proposed by the present invention; Figure 7 The present invention provides a schematic diagram of a locking ring structure of a disposable cervical dilatation balloon catheter.

[0014] In the figure: 1, external catheter; 2, vaginal balloon; 3, uterine balloon; 4, filling balloon; 5, three-way connector; 6, space filling module; 601, annular water-blocking seat; 602, injection hole; 603, stop ring; 604, cutting groove; 605, positioning member; 606, short shaft; 607, annular member; 608, rotating frame; 609, curved groove; 610, coil spring; 611, annular groove; 612, closing capsule; 613, water-blocking plate; 614, drainage port; 615, shunt tube; 616, mounting seat; 617, U-shaped groove; 618, insertion port; 619, fixing pin; 620, thin wire; 621, connecting piece; 622, spring one; 623, covering plate; 624, pull rope; 625, sealing ring; 7, winding module; 701, containing frame; 702, winding roller; 703, round shaft; 704, outer gear ring; 705, locking ring; 706, fastener; 707, spring two; 708, arc-shaped rack; 709, knob; 8, uterine filling connector; 9, vaginal filling connector; 10, manifold; 11, sleeve; 12, liquid outlet; 13, infusion tube one; 14, infusion tube two; 15, valve. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] The disposable cervical dilatation balloon catheter disclosed in the present invention is mainly used in the scenario where the space between balloons on the disposable cervical dilatation balloon catheter is relatively large after expansion.

[0017] Reference Figure 1-Figure 7A disposable cervical dilatation balloon catheter comprises an outer catheter 1, a vaginal balloon 2 and a uterine balloon 3 are arranged on the outside of the outer catheter 1, a filling balloon 4 is arranged on the side of the uterine balloon 3 close to the vaginal balloon 2, the filling balloon 4 is located on the outside of the outer catheter 1, and a fine hole is opened on the outer catheter 1, an infusion tube 2 14 is bonded in the fine hole of the outer catheter 1, a three-way joint 5 is inserted at the end of the outer catheter 1 away from the uterine balloon 3, and a uterine filling joint 8 and a vaginal filling joint 9 are respectively arranged at the two ends of the three-way joint 5 away from the outer catheter 1, an end of the infusion tube 2 14 away from the vaginal balloon 2 is located in the vaginal filling joint 9, an infusion tube 1 13 is arranged in the outer catheter 1, one end of the infusion tube 13 and the uterine balloon 3 are located on the same plane, and the ends of the infusion tube 1 13 and the infusion tube 2 14 away from the outer catheter 1 are both provided with valves Door 15, a sleeve 11 is arranged outside the infusion tube 13, a space filling module 6 is arranged inside the sleeve 11, and a manifold 10 is arranged on the outer catheter 1, and a winding module 7 is arranged on the end of the manifold 10 away from the outer catheter 1, the space filling module 6 includes an annular water-blocking seat 601, the annular water-blocking seat 601 is located outside the infusion tube 13, the outside of the annular water-blocking seat 601 is slidably connected to the inner wall of the sleeve 11, the inner wall of the sleeve 11 is connected with a stop ring 603 by bolts, the stop ring 603 is located on the side of the annular water-blocking seat 601 close to the filling balloon 4, and four circumferentially equidistantly distributed liquid outlets 12 are opened on the outer catheter 1, the liquid outlets 12 are all located on the side of the annular water-blocking seat 601 away from the filling balloon 4, and four circumferentially equidistantly distributed liquid injection holes 602 are opened on the sleeve 11 and the outer catheter 1.

[0018] Specifically, before using the disposable cervical dilation balloon catheter for dilation operation, insert one end of the infusion tube 13 with the annular member 607 into the outer catheter 1 and make the annular member 607 enter the annular water-blocking seat 601 and fix it, put the ends of the infusion tube 13 and the infusion tube 2 14 away from the outer catheter 1 into the uterine filling connector 8 and the vaginal filling connector 9 connected to the three-way connector 5 and fix them, put the cervical dilation balloon catheter into the cervix so that the two balloons can pass through the cervix evenly, insert the syringe into the uterine filling connector 8 and inject physiological saline, the physiological saline enters the uterine balloon 3 through the infusion tube 13 to fill the uterine balloon 3, and then pull the balloon back and buckle it close to the cervix. At this time, the vaginal balloon 2 is located at the external opening of the cervix, and then use the syringe to insert it into the vaginal filling connector 9 , physiological saline enters the vaginal balloon 2 through the infusion tube 14 to fill the vaginal balloon 2. When the distance between the filled vaginal balloon 2 and the uterine balloon 3 is large, the winding module 7 is used to wind up the pull rope 624, so that the space filling module 6 drives the infusion tube 13 that injects physiological saline into the uterine balloon 3 to contract in the outer catheter 1 and inject physiological saline into the filling balloon 4 to fill the filling balloon 4, so that the filling balloon 4 expands, and then fills the distance between the vaginal balloon 2 and the uterine balloon 3; the device uses the space filling module 6 to enable the disposable cervical dilation balloon catheter to fully dilate the cervix of the parturient during induction of labor, thereby reducing the gap between the vaginal balloon 2 and the uterine balloon 3 after expansion, so that the cervix of the parturient reaches a fully dilated mature state, and improves the success rate of induction of labor for the parturient.

[0019] Reference Figure 3 , Figure 4 and Figure 5In a preferred embodiment, the outside of the infusion tube 13 is connected to a ring member 607 by bolts, the outside of the ring member 607 is slidably connected to the inner wall of the annular water-blocking seat 601, an annular groove 611 is provided on the ring member 607, the inner wall of the annular groove 611 is connected to a closed bag 612 by bolts, the ring member 607 and the infusion tube 13 are both provided with a drainage port 614, and the drainage port 614 is located on the same plane as the closed bag 612; the ring member 607 and the closed bag 612 are both provided with a narrow opening on the side away from the annular water-blocking seat 601, and the narrow opening is connected by bolts. There is a shunt tube 615, one end of which is connected to the closed balloon 612, and the other end passes through the outside of the infusion tube 13 and enters the infusion tube 13. The inner wall of the infusion tube 13 is connected with a water-blocking plate 613 by bolts. The water-blocking plate 613 is located between the drainage port 614 and the shunt tube 615, and the side of the annular water-blocking seat 601 close to the filling balloon 4 is provided with three circumferentially equidistantly distributed grooves 604, and the grooves 604 are slidably connected with a retaining member 605; the side of the retaining member 605 away from the annular water-blocking seat 601 is connected with a short shaft 606 by bolts, and the retaining member 605 The side close to the annular water-blocking seat 601 is clamped with the side of the annular member 607 away from the closing bag 612, and a rotating frame 608 is arranged on the outside of the infusion tube 13, the outside of the rotating frame 608 is slidably connected to the inner wall of the sleeve 11, and the rotating frame 608 is rotatably connected to the side opposite to the annular water-blocking seat 601 through a bearing; three circumferentially equidistantly distributed curved grooves 609 are opened on the rotating frame 608, the inner walls of the three curved grooves 609 are respectively slidably connected to the outside of the three short shafts 606, and the inner wall of the rotating frame 608 is connected with a coil spring 610 through bolts, and the coil spring 610 is away from the rotating frame 6 One end of 08 is connected to the side of the annular water-blocking seat 601 close to the rotating frame 608 by bolts, and the inner wall of the sleeve 11 is slidably connected with a mounting seat 616, and the mounting seat 616 is slidably connected to the side opposite to the rotating frame 608. The outside of the mounting seat 616 is provided with an annular opening, and a sealing ring 625 is arranged in the annular opening. The outside of the sealing ring 625 is fitted with the inner wall of the sleeve 11. The side of the mounting seat 616 away from the annular water-blocking seat 601 is provided with a U-shaped groove 617, and the inner wall of the sleeve 11 is provided with two symmetrical insertion ports 618, and the insertion ports 618 and the U-shaped grooves 617 are both connected;Two symmetrical fixing pins 619 are slidably connected in the U-shaped groove 617. One end of the two fixing pins 619 is respectively engaged with the inner wall of the two insertion ports 618. The ends of the two fixing pins 619 away from the insertion ports 618 are connected to the same thin wire 620 by bolts. The thin wire 620 is located in the U-shaped groove 617. The outside of the thin wire 620 is slidably connected to two symmetrical connecting pieces 621. The outside of the two connecting pieces 621 is connected to the inner wall of the U-shaped groove 617 by bolts. There are two symmetrical connecting pieces 621 surrounding the outside of the thin wire 620. The springs 622 are connected at one end to the outside of the fixing pin 619 on the same side by bolts, and at the other end to the outside of the connecting piece 621 on the same side by bolts. The outside of the thin wire 620 is connected with a pull rope 624 by bolts, and a covering plate 623 is provided on the outside of the pull rope 624. The side of the covering plate 623 close to the mounting seat 616 is connected to the outside of the U-shaped groove 617 by bolts. The end of the pull rope 624 away from the mounting seat 616 enters the manifold 10 along the inside of the outer conduit 1. ;

[0020] Specifically, after normal saline is injected into the uterine balloon 3 and the vaginal balloon 2, if the gap between the vaginal balloon 2 and the uterine balloon 3 is too large, the cervix of the parturient cannot be fully dilated. When normal saline is injected into the uterine balloon 3, the normal saline in the infusion tube 13 is blocked by the water-blocking plate 613 and can only flow into the closed bag 612 from the drainage port 614, so that the closed bag 612 expands rapidly and seals the gap between the annular member 607 and the annular water-blocking seat 601 to prevent backflow. The normal saline in the infusion tube 13 enters the closed bag 612 through the drainage port 614 and then enters the side of the infusion tube 13 blocked by the water-blocking plate 613 through the shunt tube 615. Then it flows into the uterine balloon 3, pulling the pull rope 624, and the pull rope 624 drives the thin wire 620 to contract, thereby pulling the fixing pin 619, and the pulled fixing pin 619 overcomes the elastic force of the spring 622 and withdraws from the insertion port 618. Under the pressure of the saline injected into the uterine balloon 3, the annular water-proof seat 601 drives the mounting seat 616 to retreat in the sleeve 11 toward the filling balloon 4. Finally, the mounting seat 616 contacts the stop ring 603 and no longer moves. Continue to inject saline into the infusion tube 13, and the saline is injected into the filling balloon 4 through the injection hole 602, so that the filling balloon 4 expands and fills the gap between the vaginal balloon 2 and the uterine balloon 3.

[0021] In specific application scenarios, the space filling module 6 is mainly suitable for the space filling link in the space filling process, that is, the space filling module 6 uses the annular water-blocking seat 601 and the mounting seat 616 to enable the device to quickly and conveniently adjust according to the thickness of the cervix when dilating the cervix of the parturient, thereby avoiding the situation of replacing catheters of different sizes between different parturients and improving the applicability of the device.

[0022] Reference Figure 6 and Figure 7 In a preferred embodiment, the winding module 7 includes a accommodating frame 701, a circular opening is provided on one side of the accommodating frame 701 close to the manifold 10, the inner wall of the circular opening is connected to the outside of the manifold 10 by bolts, a notch is provided on the accommodating frame 701, a winding roller 702 is rotatably connected in the notch by a bearing, the outside of the winding roller 702 is connected to the end of the pull rope 624 away from the outer conduit 1 by bolts, and the outside of the winding roller 702 is connected to a round shaft 703 by bolts; the outside of the round shaft 703 is connected to an outer toothed ring 704 by bolts, and a locking ring 705 is provided on the outside of the outer toothed ring 704, and the locking ring 705 is slidably connected to the side opposite to the containing frame 701, and the outer side of the locking ring 705 is slidably connected with a fastener 706, the fastener 706 is connected to the side opposite to the containing frame 701 by bolts, the inner wall of the locking ring 705 is connected with an arc rack 708 by bolts, and the arc rack 708 is clamped with the outer gear ring 704; the side of the fastener 706 away from the circular shaft 703 is connected with a spring 2 707 by bolts, the end of the spring 2 707 away from the fastener 706 is connected to the inner wall of the locking ring 705 by bolts, and the side of the circular shaft 703 away from the winding roller 702 is connected with a knob 709 by bolts.

[0023] Specifically, when the pull rope 624 is pulled, the locking ring 705 is gently pushed to overcome the thrust of the spring 2 707, so that the locking ring 705 slides on the fastener 706, thereby releasing the arc-shaped rack 708 on the locking ring 705 from locking the outer gear ring 704, and turning the knob 709, which drives the circular shaft 703 to rotate, thereby rotating the winding roller 702 connected to the circular shaft 703, and the rotating winding roller 702 reels the pull rope 624, so that the pull rope 624 pulls the thin wire 620.

[0024] In a specific application scenario, the winding module 7 is mainly suitable for the winding link in the winding process, that is, the winding module 7 uses the outer tooth ring 704 and the arc-shaped rack 708 to enable the device to achieve a self-locking effect on the winding roller 702, thereby reducing the accidental touching of the pull rope 624 during the use of the catheter, which affects the dilation effect of the catheter on the maternal cervix and even causes discomfort to the maternal.

[0025] A method for assembling a disposable cervical dilatation balloon catheter, using the disposable cervical dilatation balloon catheter as described above, comprises the following steps: Step 1: Before using the disposable cervical dilation balloon catheter for dilation, insert one end of the infusion tube 13 with the annular member 607 into the outer catheter 1 and make the annular member 607 enter the annular water-blocking seat 601 for fixation, put the ends of the infusion tube 13 and the infusion tube 2 14 away from the outer catheter 1 into the uterine filling connector 8 and the vaginal filling connector 9 connected to the three-way connector 5 and fix them, and put the cervical dilation balloon catheter into the cervix so that the two balloons can pass through the cervix evenly; Step 2, insert the syringe into the uterine filling connector 8 and inject physiological saline, the physiological saline enters the uterine balloon 3 through the infusion tube 13 to fill the uterine balloon 3, and then pulls the balloon back and close to the cervix. At this time, the vaginal balloon 2 is located at the external opening of the cervix, and then uses a syringe to insert it into the vaginal filling connector 9, and the physiological saline enters the vaginal balloon 2 through the infusion tube 14 to fill the vaginal balloon 2. When the distance between the filled vaginal balloon 2 and the uterine balloon 3 is large, the winding module 7 is used to wind up the pull rope 624, so that the space filling module 6 drives the infusion tube 13 that injects physiological saline into the uterine balloon 3 to shrink in the outer catheter 1 and move toward the filling Physiological saline is injected into the filling balloon 4 and the filling balloon 4 is filled, so that the filling balloon 4 expands, and then fills the gap between the vaginal balloon 2 and the uterine balloon 3 (after the physiological saline is injected into the uterine balloon 3 and the vaginal balloon 2, if the gap between the vaginal balloon 2 and the uterine balloon 3 is too large, the cervix of the parturient cannot be fully dilated. When the physiological saline is injected into the uterine balloon 3, the physiological saline in the infusion tube 13 is blocked by the water-blocking plate 613 and can only flow into the sealing bag 612 from the drainage port 614, so that the sealing bag 612 expands rapidly and seals the gap between the annular member 607 and the annular water-blocking seat 601 to avoid backflow, and the physiological saline in the infusion tube 13 After the saline enters the closed bag 612 through the drainage port 614, it passes through the shunt tube 615 and enters the side of the infusion tube 13 blocked by the water barrier 613, and finally flows into the uterine balloon 3. When the pull rope 624 is pulled, the thrust of the spring 2 707 is overcome and the locking ring 705 is gently pushed to make the locking ring 705 slide on the fastener 706, so that the arc-shaped rack 708 on the locking ring 705 releases the lock on the outer gear ring 704, and the knob 709 is turned, and the knob 709 drives the circular shaft 703 to rotate, so that the winding roller 702 connected to the circular shaft 703 rotates, and the rotating winding roller 702 reels the pull rope 624, so that the pull rope 624 is The thin wire 620 is pulled, and the pull rope 624 drives the thin wire 620 to contract, thereby pulling the fixing pin 619. The pulled fixing pin 619 overcomes the elastic force of the spring 622 and withdraws from the insertion port 618. Under the pressure of the saline injected into the uterine balloon 3, the annular water-proof seat 601 drives the mounting seat 616 to retreat in the sleeve 11 toward the filling balloon 4. Finally, the mounting seat 616 contacts the stop ring 603 and no longer moves. The saline continues to be injected into the infusion tube 13. The saline is injected into the filling balloon 4 through the injection hole 602, so that the filling balloon 4 expands and fills the gap between the vaginal balloon 2 and the uterine balloon 3).

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A disposable cervical dilatation balloon catheter, comprising an outer catheter (1), characterized in that: The outer portion of the outer catheter (1) is provided with a vaginal balloon (2) and a uterine balloon (3); a filling balloon (4) is provided on the side of the uterine balloon (3) close to the vaginal balloon (2); the filling balloon (4) is located outside the outer catheter (1); a fine hole is provided on the outer catheter (1); a second infusion tube (14) is bonded into the fine hole of the outer catheter (1); a three-way connector (5) is inserted at one end of the outer catheter (1) away from the uterine balloon (3); the three-way connector (5) is away from the outer catheter The two ends of the outer catheter (1) are respectively provided with a uterine filling joint (8) and a vaginal filling joint (9); the end of the second infusion tube (14) away from the vaginal balloon (2) is located in the vaginal filling joint (9); the outer catheter (1) is provided with an infusion tube (13); one end of the infusion tube (13) and the uterine balloon (3) are located on the same plane; the ends of the infusion tube (13) and the second infusion tube (14) away from the outer catheter (1) are both provided with a valve (15); the infusion tube (1) A sleeve (11) is arranged outside the infusion tube (13), a space filling module (6) is arranged inside the sleeve (11), and a manifold (10) is arranged on the outer catheter (1), and a winding module (7) is arranged at one end of the manifold (10) away from the outer catheter (1), and the space filling module (6) includes an annular water-blocking seat (601), the annular water-blocking seat (601) is located outside the infusion tube (13), and the outside of the annular water-blocking seat (601) slides with the inner wall of the sleeve (11). The inner wall of the sleeve (11) is fixedly connected with a stop ring (603), the stop ring (603) is located on the side of the annular water stop (601) close to the filling balloon (4), and the outer catheter (1) is provided with four circumferentially equidistantly distributed liquid outlets (12), the liquid outlets (12) are all located on the side of the annular water stop (601) away from the filling balloon (4), and the sleeve (11) and the outer catheter (1) are both provided with four circumferentially equidistantly distributed liquid injection holes (602).

2. A disposable cervical dilatation balloon catheter according to claim 1, characterized in that: The outside of the infusion tube 1 (13) is fixedly connected to a ring-shaped part (607), the outside of the ring-shaped part (607) is slidably connected to the inner wall of the annular water-blocking seat (601), an annular groove (611) is provided on the ring-shaped part (607), the inner wall of the annular groove (611) is fixedly connected to a closed bag (612), and drainage ports (614) are provided on the ring-shaped part (607) and the infusion tube 1 (13), and the drainage ports (614) are located on the same plane as the closed bag (612).

3. A disposable cervical dilatation balloon catheter according to claim 2, characterized in that: The annular member (607) and the sealing bag (612) are both provided with a narrow opening on the side away from the annular water-blocking seat (601), and a shunt tube (615) is fixedly connected to the narrow opening. One end of the shunt tube (615) is connected to the sealing bag (612), and the other end passes through the outside of the infusion tube (13) and enters the infusion tube (13). The inner wall of the infusion tube (13) is fixedly connected with a water-blocking plate (613), and the water-blocking plate (613) is located between the drainage port (614) and the shunt tube (615). In addition, three circumferentially equidistantly distributed grooves (604) are provided on the side of the annular water-blocking seat (601) close to the filling balloon (4), and a retaining member (605) is slidably connected in each of the grooves (604).

4. A disposable cervical dilatation balloon catheter according to claim 3, characterized in that: The side of the retaining member (605) away from the annular water-blocking seat (601) is fixedly connected to a short shaft (606), the side of the retaining member (605) close to the annular water-blocking seat (601) is clamped with the side of the annular member (607) away from the sealing bag (612), and a rotating frame (608) is arranged on the outside of the infusion tube (13), the outside of the rotating frame (608) is slidably connected to the inner wall of the sleeve (11), and the rotating frame (608) is movably connected to the side opposite to the annular water-blocking seat (601).

5. A disposable cervical dilatation balloon catheter according to claim 4, characterized in that: The rotating frame (608) is provided with three circumferentially equidistantly distributed curved grooves (609), the inner walls of the three curved grooves (609) are respectively slidably connected to the outside of the three short shafts (606), the inner wall of the rotating frame (608) is fixedly connected with a coil spring (610), one end of the coil spring (610) away from the rotating frame (608) is fixedly connected to a side of the annular water-blocking seat (601) close to the rotating frame (608), and the inner wall of the sleeve (11) is slidably connected with a mounting seat (616), the mounting seat The seat (616) is slidably connected to the side opposite to the rotating frame (608); an annular opening is provided on the outside of the mounting seat (616); a sealing ring (625) is provided in the annular opening; the outside of the sealing ring (625) is in contact with the inner wall of the sleeve (11); a U-shaped groove (617) is provided on the side of the mounting seat (616) away from the annular water-blocking seat (601); and two symmetrical insertion openings (618) are provided on the inner wall of the sleeve (11); the insertion openings (618) and the U-shaped grooves (617) are both connected.

6. A disposable cervical dilatation balloon catheter according to claim 5, characterized in that: Two symmetrical fixing pins (619) are slidably connected in the U-shaped groove (617), one end of the two fixing pins (619) is respectively engaged with the inner wall of the two insertion ports (618), and one end of the two fixing pins (619) away from the insertion ports (618) is fixedly connected with the same thin wire (620), the thin wire (620) is located in the U-shaped groove (617), and the outside of the thin wire (620) is slidably connected with two symmetrical connecting pieces (621), the outside of the two connecting pieces (621) are fixedly connected with the inner wall of the U-shaped groove (617), and the outside of the thin wire (620) is surrounded by two Symmetrical springs (622), one end of the two springs (622) are respectively fixedly connected to the outside of the fixing pin (619) on the same side, and the other end are respectively fixedly connected to the outside of the connecting piece (621) on the same side. The thin wire (620) is fixedly connected to the outside with a pull rope (624), and a covering plate (623) is arranged on the outside of the pull rope (624). The side of the covering plate (623) close to the mounting seat (616) is fixedly connected to the outside of the U-shaped groove (617), and the end of the pull rope (624) away from the mounting seat (616) enters the manifold (10) along the inside of the outer conduit (1).

7. A disposable cervical dilatation balloon catheter according to claim 6, characterized in that: The winding module (7) comprises a containing frame (701), a circular opening is provided on a side of the containing frame (701) close to the manifold (10), the inner wall of the circular opening is fixedly connected to the outside of the manifold (10), a notch is provided on the containing frame (701), a winding roller (702) is movably connected in the notch, the outside of the winding roller (702) is fixedly connected to an end of the pull rope (624) away from the outer catheter (1), and the outside of the winding roller (702) is fixedly connected to a round shaft (703).

8. A disposable cervical dilatation balloon catheter according to claim 7, characterized in that: The outside of the circular shaft (703) is fixedly connected to an outer toothed ring (704), a locking ring (705) is arranged outside the outer toothed ring (704), the locking ring (705) is slidably connected to the side opposite to the containing frame (701), and a fastener (706) is slidably connected to the outside of the locking ring (705), the fastener (706) is fixedly connected to the side opposite to the containing frame (701), and an arc-shaped rack (708) is fixedly connected to the inner wall of the locking ring (705), and the arc-shaped rack (708) is clamped to the outer toothed ring (704).

9. A disposable cervical dilatation balloon catheter according to claim 8, characterized in that: A second spring (707) is fixedly connected to the side of the fastener (706) away from the circular shaft (703); one end of the second spring (707) away from the fastener (706) is fixedly connected to the inner wall of the locking ring (705); and a knob (709) is fixedly connected to the side of the circular shaft (703) away from the winding roller (702).

10. A method for assembling a disposable cervical dilatation balloon catheter, using the disposable cervical dilatation balloon catheter according to claim 9, characterized in that: The steps include: Step 1: Before using the disposable cervical dilation balloon catheter for dilation, insert one end of the infusion tube 1 (13) together with the annular member (607) into the outer catheter (1) and allow the annular member (607) to enter the annular water-blocking seat (601) and be fixed; insert the ends of the infusion tube 1 (13) and the infusion tube 2 (14) away from the outer catheter (1) into the uterine filling connector (8) and the vaginal filling connector (9) connected to the three-way connector (5) and fix them; insert the cervical dilation balloon catheter into the cervix so that the two balloons can pass through the cervix evenly; Step 2: insert a syringe into the uterine filling connector (8) and inject physiological saline. The physiological saline enters the uterine balloon (3) through the infusion tube (13) to fill the uterine balloon (3). Then, pull the balloon back and buckle it close to the cervix. At this time, the vaginal balloon (2) is located at the external opening of the cervix. Then, insert a syringe into the vaginal filling connector (9). The physiological saline enters the vaginal balloon (2) through the infusion tube (14) to fill the vaginal balloon (2). When the distance between the vaginal balloon (2) and the uterine balloon (3) is relatively large, the drawstring (624) is rolled up using the rolling module (7), so that the space filling module (6) drives the infusion tube (13) for injecting saline into the uterine balloon (3) to contract in the outer catheter (1), inject saline into the filling balloon (4), and fill the filling balloon (4), so that the filling balloon (4) expands, thereby filling the distance between the vaginal balloon (2) and the uterine balloon (3).

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