Membrane rupture and labor induction combined instrument for assisting fixation of fetal head

Abstract

The invention discloses a membrane rupture and labor induction combined instrument for assisting fixation of a fetal head, which comprises a labor induction hose, a separation layer is arranged in the labor induction hose, a rubber convex layer is fixed at the end part of the labor induction hose, and a membrane rupture hose extending out of the bottom of the labor induction hose is arranged in the labor induction hose. A separation layer is arranged between the outer circle of the membrane rupture hose and the labor induction hose, one end of the membrane rupture hose is fixedly connected with the inner wall of the rubber convex layer, a liquid bag fixing mechanism is arranged at the gap between the interior of the labor induction hose and the separation layer and penetrates through the rubber convex layer, a containing groove is formed in the center of the rubber convex layer, and the liquid bag fixing mechanism penetrates through the containing groove. And a membrane rupturing needle is fixedly connected to the central position in the accommodating groove. Operation can be carried out according to the real-time condition of a puerpera, under the condition that the amniotic fluid flow speed is normal, all the liquid bags do not need to be used, and the adverse effect on excessive expansion of the cervix uteri condition of the puerpera is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of obstetric equipment and instruments, and particularly relates to a combined instrument for artificial rupture of membranes with assisted fetal head fixation. Background Art

[0002] Artificial rupture of membranes is an artificial way to intervene and tear the amniotic membrane at the cervical os, so as to observe the color of amniotic fluid, strengthen uterine contractions, and accelerate the progress of labor. It is a relatively common induction of labor method in the process of natural childbirth. The surgical steps of artificial rupture of membranes: when the cervical os is dilated ≥3 cm, without cephalopelvic disproportion, the fetal head is engaged, without umbilical cord prolapse and placenta previa, check the vaginal cleanliness, and perform a vaginal examination under strict disinfection. Between two uterine contractions, insert the middle and index fingers of the left hand into the vagina to guide, hold a toothed forceps with the right hand to clamp and tear the fetal membrane, and use the fingers to enlarge the rupture opening. After the rupture of membranes, the fingers of the operator should stay in the vagina. After 1-2 uterine contractions and the fetal head enters the pelvis, the operator then takes out the fingers, and pay attention to observe whether fetal hair can be seen, the amount of amniotic fluid flowing out, and the color of amniotic fluid. Immediately listen to the fetal heart rate after the rupture of membranes. When the amniotic fluid is less, gently push up the fetal head to facilitate the outflow of amniotic fluid for judgment. Natural rupture of membranes during the production process is an important clinical manifestation in the first stage of labor. When the presenting part of the fetus is engaged, the amniotic fluid is blocked into two parts, and the amniotic fluid in front of the presenting part is the forewaters. As the labor progresses, the pressure in the forewaters increases. When it reaches a certain level, the fetal membrane ruptures and the amniotic fluid flows out. Normally, at this time, the cervical os is mostly nearly fully dilated or already fully dilated. Artificial rupture of membranes has certain indications. If there are abnormal labor processes, such as prolonged latent period, delayed cervical dilation, etc., it is judged according to the uterine contraction situation of the parturient and the speed of cervical dilation. Under the condition of excluding fetal cephalopelvic disproportion, malposition, etc., artificial rupture of membranes can be carried out. A venous access is routinely established before the rupture of membranes for emergency treatment in case of abnormal conditions after the rupture of membranes. After the rupture of membranes, on the one hand, the color of amniotic fluid can be observed, so as to indirectly observe the situation of the fetus in the uterus. If the amniotic fluid is clear and the labor process has not stalled, continue to wait for delivery; if it is grade I amniotic fluid and the labor process has not stalled, continue to wait for delivery under close observation of the fetal heart sound, and perform fetal heart monitoring if necessary. The waiting and observing time generally does not exceed 2 hours. If there are abnormalities, immediately perform a surgical delivery to end the pregnancy. If it is grade II amniotic fluid and delivery cannot be immediately ended, then immediately perform a cesarean section. On the other hand, when the uterine contractions are poor, the rupture of membranes can strengthen the uterine contractions and shorten the labor process. After the rupture of membranes, it should be observed for about 1 hour. If the uterine contractions have not been significantly strengthened compared with before, oxytocin can be given to strengthen the uterine contractions and promote the progress of delivery. Of course, after the rupture of membranes, the uterine contractions should also be closely observed to avoid too strong uterine contractions caused by the rupture of membranes resulting in fetal distress in utero or inducing placental abruption, causing obstetric emergencies.

[0003] The invention patent with domestic application number 202111046796.0 discloses an obstetric membrane rupture device, which includes a hollow catheter and an expandable inverted cone membrane rupture device, which is arranged at the top of the catheter, and includes an inner sleeve, a support keel, a support rod and a protective film, wherein there are multiple support rods, and the bottom ends of the multiple support rods are connected to the upper end of the catheter, and the protective film is arranged around the support rod, and the inner sleeve is arranged in the catheter, and the upper part extends into the protective film, and the upper part of the catheter is provided with a slide groove, and a push rod that can move up and down along the slide groove is fixedly arranged on the inner sleeve, and a support keel is arranged at the upper part of the inner sleeve, and the support keel is arranged in an inclined manner, and the bottom end is connected to the inner sleeve, and the head end is connected to the support rod. The present invention has the advantages of simple operation, high safety, reduced patient discomfort and high success rate. The above invention is inserted into the vagina in a reversed umbrella shape. When the resistance of the amniotic sac is touched, the push rod is pushed to drive the inner sleeve and the support keel to open the support rod. The sawtooth inside the protective membrane pierces the amniotic membrane, and the outflowing amniotic fluid flows out from the inner sleeve and the hollow catheter. The structure is simple to operate, but it cannot fix the fetal head. After puncturing the fetal membrane, the fetal head may shift with the outflow of amniotic fluid. Once the fetal head shifts, it will cause umbilical cord prolapse, causing the umbilical cord to be squeezed and cause fetal hypoxia or fetal distress, which is not conducive to the progress of production. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a combined instrument for rupturing membranes and inducing labor for assisting in fixing the fetal head, including an induction labor hose, a partition layer is provided inside the induction labor hose, a rubber convex layer is fixed to the end of the induction labor hose, a membrane rupture hose extending from the bottom of the induction labor hose is provided inside the induction labor hose, and a partition layer is provided between the outer circle of the membrane rupture hose and the induction labor hose, one end of the membrane rupture hose is fixedly connected to the inner wall of the rubber convex layer, a liquid sac fixing mechanism is provided at the gap between the inside of the induction labor hose and the partition layer, the rubber convex layer is penetrated by the liquid sac fixing mechanism, a receiving groove is provided at the center of the rubber convex layer, and a membrane rupture needle is fixedly connected at the center of the receiving groove.

[0005] The fetal membrane is punctured by the membrane rupture needle, and the fetal head is fixed by the sac fixation mechanism.

[0006] As a further preferred technical solution of the present invention, a fingertip sealing hole is provided on the outside of the abortion induction hose at a position between the separation layers.

[0007] According to the sealing of different fingertip sealing holes, the liquid sac fixing mechanisms at different positions are pressurized and discharged to fix the fetal head.

[0008] As a further preferred technical solution of the present invention, a piston block is provided inside the membrane rupture hose at one end of the membrane rupture needle, and a branch pipe penetrating the bottom of the abortion induction hose is provided at the other end of the membrane rupture hose.

[0009] Pressurize the inner cavities of the induction labor hose and the amniotomy hose through a medical gas source system, push and pull the piston block inside the amniotomy hose, and make the amniotomy needle perform amniotomy treatment.

[0010] As a further preferred technical solution of the present invention; a rigid inner shell fixed to the inner side of the rubber convex layer is provided at the position of the storage groove, the inner side of the rigid inner shell is fixedly connected to an elastic fixing strip connected to the end of the amniotomy needle, and an elastic pulling end is provided between the elastic fixing strip and the amniotomy needle.

[0011] After the branch pipe is connected to the medical gas source system, the medical gas source system pressurizes the inner cavity of the amniotomy hose, pushes the piston block forward, and makes the end of the amniotomy needle pierce the fetal membrane, so as to achieve the amniotomy effect. However, the end of the amniotomy needle is in a closed state and cannot conduct the amniotic fluid after amniotomy. After amniotomy, the medical gas source system also depressurizes the inner cavity of the amniotomy hose, so that the amniotomy needle retracts into the storage groove and will not affect the fetal head.

[0012] As a further preferred technical solution of the present invention; a plurality of positioning convex points are provided at a position on the rubber convex layer around the outside of the storage groove.

[0013] When the amniotomy needle performs amniotomy, the positioning convex points assist in positioning the surface of the fetal membrane, which is beneficial to rapid amniotomy.

[0014] As a further preferred technical solution of the present invention; three receiving and discharging holes are provided on the rubber convex layer, and the liquid sac fixing mechanism includes an elastic connecting strip connected to the inner wall of the rubber convex layer at the position of the receiving and discharging holes, a liquid sac bag connected to the elastic connecting strip, and a liquid injection hose fixedly connected to the inner cavity of the liquid sac bag and extending to the outside. An elastic sealing block is provided inside the liquid sac bag at the connection between the elastic connecting strip and the liquid sac bag, and one end of the liquid injection hose penetrates through the elastic sealing block and extends into the inner cavity between the induction labor hose and the separation layer.

[0015] One end of the liquid injection hose is connected to the infusion system through the induction labor hose, and the liquid sac bag is infused, so that the volume of the liquid sac bag increases to fix the fetal head, and at the same time, it also has the effect of slowing down the outflow of amniotic fluid.

[0016] As a further preferred technical solution of the present invention; one end of the elastic connecting strip is provided with a fixed end fixedly connected to the inner wall of the rubber convex layer, and a rebounding end is provided between the fixed end and the liquid sac bag.

[0017] After amniotomy, the medical gas source system pressurizes the inner cavity of the induction labor hose, so that the liquid sac bag is discharged through the receiving and discharging holes, enters the fetal head fixing area in the cervix, and then the liquid injection hose is externally connected to the infusion system to infuse the liquid sac bag, so that the liquid sac bag expands.

[0018] As a further preferred technical solution of the present invention; the liquid sac bag extends to the outside of the induction labor hose through the retraction hole, and 6 groups of positioning layers are fixed at the position of the rubber convex layer between the inner side of the induction labor hose and the membrane rupture hose, and a retraction area is provided between the positioning layers.

[0019] When the liquid sac bag fixes the fetal head after membrane rupture, it is led out through the retraction hole. After the fetal head is delivered, the liquid inside the liquid sac bag can be pumped out through the infusion system to shrink the liquid sac bag, and the medical gas source system is used to relieve the pressure in the inner cavity of the induction labor hose, so that the liquid sac bag is retracted into the induction labor hose again through the retraction hole. In this process, the position of the end of the injection hose is manually controlled by medical staff to achieve the traction effect on the liquid sac bag when retracting. The positioning layer limits the retraction and release position of the liquid sac bag, has a certain positioning property, and enables the liquid sac bag to be stably retracted and released in the retraction area.

[0020] As a further preferred technical solution of the present invention; a water injection cavity is provided inside the liquid sac bag, one end of the injection hose penetrates through the elastic sealing block and is provided with an inner cavity hose fixedly connected to the water injection cavity, a liquid injection channel is provided inside the inner cavity hose, and a plurality of groups of liquid injection holes are opened in an outer circle of the inner cavity hose, and the ends of the injection hoses are fixedly received through a bundle tube leather sleeve.

[0021] Before use, the bundle tube leather sleeve needs to be disassembled, and the liquid sac bag is injected through the liquid injection hole to increase the volume of the liquid sac bag and make it expand, close to the cervical wall, and compress the cervix to fix the fetal head. After membrane rupture, the three groups of liquid sac bags are used according to the flow rate of the amniotic fluid, and the flow rate of the amniotic fluid can be controlled.

[0022] Beneficial effects

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. After the branch pipe is connected to the medical gas source system, the medical gas source system pressurizes the inner cavity of the membrane rupture hose, so that the piston block is pushed forward. Since the inside of the membrane rupture hose is in a sealed state, the elastic fixing strip and the elastic pulling end push out the membrane rupture needle under the pressurized state, so that the end of the membrane rupture needle punctures the fetal membrane, thereby achieving the membrane rupture effect. The rupture opening generated by the puncture is small, and the flow rate of the buffered amniotic fluid is reduced. And the end of the membrane rupture needle is in a closed state and cannot guide the amniotic fluid after membrane rupture, so that the amniotic fluid can only flow out through the gap between the fetal head and the cervix. After membrane rupture, the medical gas source system also relieves the pressure in the inner cavity of the membrane rupture hose, so that the membrane rupture needle is retracted into the storage groove and will not affect the fetal head.

[0025] 2. After the membrane is ruptured, the three groups of liquid sac bags are used according to the outflow rate of the amniotic fluid, which can control the outflow rate of the amniotic fluid, avoid the sudden change of the intrauterine pressure caused by the rapid outflow of the amniotic fluid, prevent the amniotic fluid that has not passed through the cervix from entering the maternal circulation through the open blood vessels, reduce the risk of amniotic fluid embolism, and at the same time, keeping the amniotic fluid flowing out slowly also avoids the situation where the umbilical cord slips out with the amniotic fluid and forms a prolapse. Once the umbilical cord prolapses and is compressed, the blood flow in the umbilical artery and umbilical vein will be blocked, causing fetal hypoxia and affecting development. And the liquid sac bag is slowly injected with liquid through the injection hose, which effectively dilates the cervix slowly and gradually, prolongs the time for the cervix to adapt to the dilation, and reduces the risk of tearing.

[0026] 3. While achieving the effect of membrane rupture with one induction hose, it can also fix the fetal head, assist in cervical dilation, effectively block the amniotic fluid orifice, and control the amniotic fluid flow rate. Multiple functions do not require multiple insertions of the tube, avoiding the adverse effects caused by multiple insertions during the parturient's delivery. At the same time, it can be operated according to the real-time situation of the parturient. When the amniotic fluid flow rate is normal, it is not necessary to use all the liquid sac bags, reducing the adverse effects of excessive dilation on the parturient's cervical condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the present invention;

[0028] Figure 2 is a schematic cross-sectional structural diagram of the present invention;

[0029] Figure 3 is a schematic rear-view structural diagram of the present invention;

[0030] Figure 4 is a schematic cross-sectional structural diagram of the branch pipe position of the present invention;

[0031] Figure 5 is a schematic cross-sectional structural diagram of the liquid sac bag position of the present invention;

[0032] Figure 6 is Figure 2 an enlarged structural diagram of A in

[0033] In the figure: 1. Induction hose; 11. Finger pulp hole sealing; 12. Separation layer; 2. Rubber convex layer; 21. Retracting hole; 22. Positioning convex point; 23. Receiving groove; 24. Positioning layer; 25. Retracting area; 26. Elastic fixing strip; 27. Elastic pulling end; 28. Rigid inner shell; 3. Liquid sac fixing mechanism; 31. Liquid sac bag; 311. Water injection cavity; 312. Elastic sealing block; 32. Elastic connecting strip; 321. Rebound end; 322. Fixed end; 33. Injection hose; 331. Injection channel; 332. Inner cavity hose; 333. Injection hole; 34. Tube bundle leather sleeve; 4. Membrane rupture hose; 41. Branch pipe; 42. Piston block; 5. Membrane rupture needle. Detailed implementation mode

[0034] This detailed implementation mode is a combined instrument for artificial rupture of membranes and induction of labor to assist in fixing the fetal head.

[0035] The above invention is placed into the vagina in a reverse-converging umbrella shape. When encountering the resistance of the amniotic sac, the push rod is pushed, driving the inner sleeve and the support keel, so that the support rod expands, and the serrations inside the protective film puncture the amniotic membrane. The flowing amniotic fluid flows out through the inner sleeve and the hollow liquid guide tube. This structure is simple to operate, but it cannot fix the fetal head. After the fetal membrane is punctured, the fetal head may shift as the amniotic fluid flows out. Once the fetal head shifts, it will cause umbilical cord prolapse, resulting in compression of the umbilical cord and causing fetal hypoxia or fetal distress, which is not conducive to the progress of childbirth.

[0036] Its structural schematic diagram is as Figures 1 - 3 shown. A combined instrument for artificial rupture of membranes and induction of labor to assist in fixing the fetal head includes an induction of labor flexible tube 1. A partition layer 12 is provided inside the induction of labor flexible tube 1. A rubber convex layer 2 is fixed at the end of the induction of labor flexible tube 1. A membrane rupture flexible tube 4 extending out of the bottom of the induction of labor flexible tube 1 is provided inside the induction of labor flexible tube 1. And a partition layer 12 is provided between the outer circumference of the membrane rupture flexible tube 4 and the induction of labor flexible tube 1. One end of the membrane rupture flexible tube 4 is fixedly connected to the inner wall of the rubber convex layer 2. A liquid sac fixing mechanism 3 is provided through the rubber convex layer 2 at the gap between the inside of the induction of labor flexible tube 1 and the partition layer 12. Finger pulp sealing holes 11 are opened at the position of the induction of labor flexible tube 1 outside the partition layer 12. Under the condition of meeting the conditions for artificial rupture of membranes and induction of labor, first, the cleanliness of the internal environment of the parturient's vagina is checked. After strict disinfection of the instrument, one end of the induction of labor flexible tube 1 is guided into the parturient's vagina to determine the position of the fetal head. After the membrane is ruptured, the medical gas source system connected to the other end of the induction of labor flexible tube 1 is inflated. According to the specific need to fix the position of the fetal head, the corresponding finger pulp sealing holes 11 are sealed with finger pulp, so that the liquid sac fixing mechanism 3 is pressed to discharge into the fetal head fixing area inside the induction of labor flexible tube 1. Then, the liquid sac bag 31 inside is infused through the liquid injection flexible tube 33, so that the liquid sac fixing mechanism 3 achieves the effect of fixing the fetal head. By sealing different positions of the finger pulp sealing holes 11, the liquid sac fixing mechanisms 3 at different positions are pressed to discharge to fix the fetal head.

[0037] Its structural schematic diagram is as Figures 4 - 6As shown in the figure. A storage groove 23 is opened at the center of the rubber convex layer 2, and a membrane-breaking needle 5 is fixedly connected at the center of the interior of the storage groove 23. A piston block 42 is provided at one end of the membrane-breaking needle 5 inside the membrane-breaking hose 4, and a branch pipe 41 penetrating the bottom of the induction labor hose 1 is provided at the other end of the membrane-breaking hose 4. One ends of the branch pipe 41 and the induction labor hose 1 are both connected to the medical gas source system. The medical gas source system pressurizes the inner cavities of the induction labor hose 1 and the membrane-breaking hose 4, pushes and stores the liquid sac fixing mechanism 3 inside the induction labor hose 1, and pushes and pulls the piston block 42 inside the membrane-breaking hose 4, so that the membrane-breaking needle 5 performs a membrane-breaking treatment. After the membrane-breaking treatment, the medical gas source system changes the pressure in the inner cavity of the membrane-breaking hose 4 to pull the piston block 42 backward, so that the membrane-breaking needle 5 retracts into the storage groove 23 after membrane-breaking, and does not affect the fetus after membrane-breaking in the cervix. A rigid inner shell 28 fixed to the inner side of the rubber convex layer 2 is provided at the position of the storage groove 23. The inner side of the rigid inner shell 28 is fixedly connected to an elastic fixing strip 26 connected to the end of the membrane-breaking needle 5, and an elastic pulling end 27 is provided between the elastic fixing strip 26 and the membrane-breaking needle 5. After the branch pipe 41 is connected to the medical gas source system, the medical gas source system pressurizes the inner cavity of the membrane-breaking hose 4, so that the piston block 42 is pushed forward. Since the inside of the membrane-breaking hose 4 is in a sealed state, the elastic fixing strip 26 and the elastic pulling end 27 push out the membrane-breaking needle 5 under the pressurized state, so that the end of the membrane-breaking needle 5 pierces the fetal membrane, thus achieving the membrane-breaking effect. The end of the membrane-breaking needle 5 is in a closed state and cannot conduct the amniotic fluid after membrane-breaking. After membrane-breaking, the medical gas source system also depressurizes the inner cavity of the membrane-breaking hose 4, so that the membrane-breaking needle 5 retracts into the storage groove 23 and does not affect the fetal head. A plurality of positioning bumps 22 are provided at the position of the rubber convex layer 2 on the outer circle of the storage groove 23. When the membrane-breaking needle 5 breaks the membrane, the positioning bumps 22 assist in positioning the surface of the fetal membrane, which is beneficial to quickly break the membrane.

[0038] Three groups of retractable holes 21 are formed in the rubber convex layer 2. The liquid sac fixing mechanism 3 includes an elastic connecting strip 32 connected to the inner wall of the rubber convex layer 2 at the position of the retractable hole 21, a liquid sac bag 31 connected to the elastic connecting strip 32, and an infusion hose 33 fixedly connected to the inner cavity of the liquid sac bag 31 and extending to the outer end. An elastic sealing block 312 is arranged inside the liquid sac bag 31 at the connection between the elastic connecting strip 32 and the liquid sac bag 31, and one end of the infusion hose 33 penetrates through the elastic sealing block 312 and extends into the inner cavity between the induction hose 1 and the separation layer 12. One end of the infusion hose 33 is connected to an infusion system through the induction hose 1 to infuse the inside of the liquid sac bag 31, so that the volume of the liquid sac bag 31 increases to fix the fetal head, and at the same time, it has the effect of slowing down the outflow of amniotic fluid. One end of the elastic connecting strip 32 is provided with a fixed end 322 fixedly connected to the inner wall of the rubber convex layer 2, and a resilient end 321 is arranged between the fixed end 322 and the liquid sac bag 31. According to the specific position where the fetal head needs to be fixed, the corresponding finger pulp sealing hole 11 is sealed with the finger pulp. After the membrane is ruptured, the medical gas source system pressurizes the inner cavity of the induction hose 1, so that the liquid sac bag 31 is discharged through the retractable hole 21 and enters the fetal head fixation area in the cervix. Then, the infusion hose 33 is externally connected to an infusion system to infuse the inside of the liquid sac bag 31, so that the liquid sac bag 31 expands to achieve the effect of fixing the fetal head. The liquid sac bag 31 extends to the outside of the induction hose 1 through the retractable hole 21. Six groups of positioning layers 24 are fixed at the position of the rubber convex layer 2 between the inner side of the induction hose 1 and the membrane rupture hose 4, and a retractable area 25 is arranged between the positioning layers 24. When the liquid sac bag 31 fixes the fetal head after the membrane is ruptured, it is led out through the retractable hole 21 of the liquid sac bag 31. After fixation, it can assist the cervical opening and has the effect of delaying the discharge of amniotic fluid. After the fetal head is delivered, the liquid inside the liquid sac bag 31 can be extracted through the infusion system, so that the liquid sac bag 31 shrinks, and the medical gas source system is used to relieve the pressure in the inner cavity of the induction hose 1, so that the liquid sac bag 31 is retracted into the induction hose 1 again through the retractable hole 21. In this process, the position of the end of the infusion hose 33 is manually controlled by medical staff to achieve the traction effect on the liquid sac bag 31 during retraction. The positioning layer 24 limits the retractable position of the liquid sac bag 31 and has a certain positioning function, so that the liquid sac bag 31 is stably retracted and released in the retractable area 25.

[0039] Inside the liquid sac 31, there is a water injection cavity 311. One end of the liquid injection hose 33 passes through the elastic sealing block 312 and is provided with an inner cavity hose 332 fixedly connected to the water injection cavity 311. Inside the inner cavity hose 332, there is a liquid injection channel 331, and a plurality of groups of liquid injection holes 333 are arranged in a circle on the outer part of the inner cavity hose 332. The ends of the liquid injection hoses 33 are fixedly stored through a bundle tube leather sleeve 34. Before use, the bundle tube leather sleeve 34 needs to be disassembled, and the inside of the liquid sac 31 is injected with liquid through the liquid injection holes 333, so that the volume of the liquid sac 31 increases and expands, tightly adheres to the cervical wall, compresses the cervix and fixes the fetal head. After the membrane rupture, according to the outflow rate of the amniotic fluid, the three groups of liquid sacs 31 are used, which can control the outflow rate of the amniotic fluid, avoid the sudden change of the intrauterine pressure caused by the rapid outflow of the amniotic fluid, prevent the amniotic fluid that has not flowed out of the cervix from entering the maternal circulation through the open blood vessels, reduce the risk of amniotic fluid embolism, and at the same time, keeping the amniotic fluid flowing out slowly also avoids the situation that the umbilical cord slips out with the amniotic fluid and forms a prolapse. Once the umbilical cord prolapse is compressed, it will block the blood flow of the umbilical artery and umbilical vein, causing fetal hypoxia and affecting development. And the liquid sac 31 is slowly injected with liquid through the liquid injection hose 33, which effectively dilates the cervix slowly and gradually, prolongs the time for the cervix to adapt to the dilation, and reduces the risk of tearing. While achieving the effect of membrane rupture with one induction hose, it can also fix the fetal head, assist in cervical dilation, effectively block the amniotic fluid orifice, and control the amniotic fluid flow rate. Multiple functions do not require multiple catheter insertions, avoiding the adverse effects on the parturient during childbirth caused by multiple catheter insertions. At the same time, it can be operated according to the real-time situation of the parturient. When the amniotic fluid flow rate is normal, it is not necessary to use all the liquid sacs, reducing the adverse effects of excessive dilation on the cervical condition of the parturient.

[0040] During the production process, the cases that require artificial rupture of membranes for induction of labor are as follows: For parturients with induction of labor indications who need to give birth prematurely or have post-term pregnancy; for parturients with premature rupture of membranes but without spontaneous uterine contractions; for twin parturients without vaginal delivery contraindications, when the membranes have not ruptured in the second stage of labor and the parturient is physically exhausted and needs artificial rupture of membranes for induction of labor; and also when the fetal heart rate monitoring is abnormal during the labor process or before delivery, and the ultrasonic examination indicates that the amniotic fluid volume is below the critical value, artificial rupture of membranes is needed to understand the amniotic fluid condition of the parturient; finally, when other problems related to the health of the parturient and the fetus itself occur, artificial rupture of membranes for induction of labor is required.

[0041] Before artificial rupture of membranes for induction of labor, it is first necessary to determine the conditions of the parturient: the fetal head has descended and is closely attached to the cervix wall, the BISHOP score is greater than 6 points, the cervix is already mature, the cervical os is dilated by more than 1 cm, there are no contraindications to artificial rupture of membranes, etc. Only then can artificial rupture of membranes be carried out to promote uterine contractions, and it is often combined with drugs to promote cervical ripening to accelerate the process. This combined instrument for artificial rupture of membranes for induction of labor can be mass-produced as a disposable medical product according to the actual situation. After strict disinfection before use, first check the cleanliness of the internal environment of the parturient's vagina. After strict disinfection of the instrument, one end of the induction hose 1 is guided into the parturient's vagina to determine the position of the fetal head. The internal cavities of the induction hose 1 and the membrane rupture hose 4 are pressurized through the medical gas source system, and the piston block 42 inside the membrane rupture hose 4 is pushed to make the membrane rupture needle 5 perform membrane rupture treatment. After the membrane rupture treatment, the medical gas source system changes the pressure in the inner cavity of the membrane rupture hose 4 to pull the piston block 42 backward, so that the membrane rupture needle 5 is retracted into the storage groove 23 after membrane rupture, without affecting the fetus after membrane rupture in the cervix. After membrane rupture, the gas source system connected to the other end of the induction hose 1 is used for inflation. According to the specific need to fix the position of the fetal head, the corresponding finger pulp sealing holes 11 are sealed with finger pulp. The medical gas source system pressurizes the inner cavity of the induction hose 1, so that the liquid sac bag 31 is discharged through the retraction and release holes 21, enters the fetal head fixation area in the cervix, and then the liquid sac bag 31 is infused through the infusion hose 33 connected to an external infusion system, so that the liquid sac bag 31 expands to achieve the effect of fixing the fetal head. Then, the liquid sac bag 31 is infused through the infusion hose 33 again, so that the volume of the liquid sac bag 31 increases and expands, adheres to the cervix wall, compresses the cervix and fixes the fetal head. During this process, the liquid sac bag 31 can be infused according to the judged amniotic fluid flow rate to control the amniotic fluid flow rate, avoid other risks of its rapid outflow, and effectively dilate the cervix slowly and gradually. This process is simple and convenient to operate.

[0042] All the technical features in this embodiment can be freely combined according to actual needs.

[0043] The above embodiments are the preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution of the present invention is within the protection scope of the present invention.

Claims

1. A combined instrument for rupturing membranes and inducing labor to assist in fixation of the fetal head, characterized in that: The invention comprises an abortion induction hose (1), wherein a partition layer (12) is provided inside the abortion induction hose (1), a rubber convex layer (2) is fixed at the end of the abortion induction hose (1), a membrane rupture hose (4) extending from the bottom of the abortion induction hose (1) is provided inside the abortion induction hose (1), and a partition layer (12) is provided between the outer circle of the membrane rupture hose (4) and the abortion induction hose (1), one end of the membrane rupture hose (4) is fixedly connected to the inner wall of the rubber convex layer (2), a liquid sac fixing mechanism (3) is provided in the gap between the inside of the abortion induction hose (1) and the partition layer (12) and penetrates the rubber convex layer (2), a receiving groove (23) is provided at the center of the rubber convex layer (2), and a membrane rupture needle (5) is fixedly connected at the center of the receiving groove (23).

2. The combined instrument for rupturing membranes and inducing labor for assisting the fixation of the fetal head according to claim 1, characterized in that: The outside of the abortion induction hose (1) is provided with a fingertip sealing hole (11) at a position between the separation layers (12).

3. The combined instrument for rupturing membranes and inducing labor for assisting the fixation of the fetal head according to claim 1, characterized in that: A piston block (42) is provided inside the membrane-breaking hose (4) at one end of the membrane-breaking needle (5), and a branch pipe (41) penetrating the bottom of the abortion-inducing hose (1) is provided at the other end of the membrane-breaking hose (4).

4. The combined instrument for rupturing membranes and inducing labor for assisting the fixation of the fetal head according to claim 1, characterized in that: A hard inner shell (28) fixed to the inner side of the rubber convex layer (2) is provided at the position of the receiving groove (23); the inner side of the hard inner shell (28) is fixedly connected to an elastic fixing strip (26) connected to the end of the membrane-breaking needle (5); and an elastic pulling end (27) is provided between the elastic fixing strip (26) and the membrane-breaking needle (5).

5. The combined instrument for rupturing membranes and inducing labor for assisting the fixation of the fetal head according to claim 1, characterized in that: A plurality of groups of positioning convex points (22) are provided on the rubber convex layer (2) at positions located one circle outside the receiving groove (23).

6. The combined instrument for rupturing membranes and inducing labor for assisting fixation of the fetal head according to claim 1, characterized in that: The rubber convex layer (2) is provided with three groups of receiving and releasing holes (21), and the liquid sac fixing mechanism (3) comprises an elastic connecting strip (32) connected to the inner wall of the rubber convex layer (2) at the position of the receiving and releasing holes (21), a liquid sac bag (31) connected to the elastic connecting strip (32), and a liquid injection hose (33) fixedly connected to the inner cavity of the liquid sac bag (31) and extending to the outer end, an elastic sealing block (312) is provided inside the liquid sac bag (31) at the connection between the elastic connecting strip (32) and the liquid sac bag (31), and one end of the liquid injection hose (33) passes through the elastic sealing block (312) and extends to the inner cavity between the abortion induction hose (1) and the separation layer (12).

7. The combined instrument for rupturing membranes and inducing labor for assisting fixation of the fetal head according to claim 6, characterized in that: One end of the elastic connecting strip (32) is provided with a fixed end (322) fixedly connected to the inner wall of the rubber convex layer (2), and a rebound end (321) is provided between the fixed end (322) and the liquid capsule bag (31).

8. The combined instrument for rupturing membranes and inducing labor for assisting the fixation of the fetal head according to claim 6, characterized in that: The fluid bag (31) extends to the outside of the abortion induction hose (1) through the retractable hole (21), and six groups of positioning layers (24) are fixed between the inner side of the abortion induction hose (1) and the membrane rupture hose (4) at the position of the rubber convex layer (2), and a retractable area (25) is provided between the positioning layers (24).

9. The combined instrument for rupturing membranes and inducing labor for assisting fixation of the fetal head according to claim 6, characterized in that: A water injection cavity (311) is provided inside the liquid capsule bag (31), one end of the liquid injection hose (33) passes through the elastic sealing block (312) and is provided with an inner cavity hose (332) fixedly connected to the water injection cavity (311), a liquid injection channel (331) is provided inside the inner cavity hose (332), and a plurality of groups of liquid injection holes (333) are provided on the outer circle of the inner cavity hose (332), and the ends of the liquid injection hose (33) are fixedly stored by a bundle tube leather sleeve (34).

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