Obstetrical rupture of membranes

Abstract

The invention relates to an obstetric artificial membrane rupture device, comprising a handle, a hard blunt head and a puncture straw, wherein two hard blunt heads in an "eight" shape and symmetrical are arranged at the front end of the handle, the front end of the hard blunt head is rounded and bent forward to the middle, and a gap is left between the two hard blunt heads for exposing the amniotic sac; a cavity is arranged inside the handle, the puncture straw is installed on the handle, the front end of the puncture straw extends to the gap, and a slope puncture surface is arranged at the front end of the puncture straw; a cavity is arranged inside the handle, the puncture straw is a hollow structure, and the rear end of the inner hole of the puncture straw is sealed and connected with the front end of the cavity in the handle; a negative pressure suction port is arranged on the slope puncture surface, the negative pressure suction port is connected with the inner hole of the puncture straw, the negative pressure suction port is closed with a water-soluble material, the inner hole of the puncture straw and the cavity of the handle are connected with each other and vacuumized to form a negative pressure, and a transparent observation window is arranged on the handle. The invention has an ingenious structure, a reasonable design, safety and reliability, and can better protect the fetal scalp from being damaged.

Description

Technical Field

[0001] The invention relates to an auxiliary artificial rupture of membranes device, in particular to an obstetric artificial rupture of membranes device, belonging to the technical field of medical instruments. Background Art

[0002] Clinically, many parturients fail to rupture membranes naturally and need doctors to assist in artificial rupture of membranes. Artificial rupture of membranes is to artificially intervene to tear the amniotic membrane at the cervical os, discharge amniotic fluid, make the presenting part descend, stimulate the cervix, cause uterine contraction, dilate the cervical os, and accelerate the progress of labor. It is a common method of inducing labor during natural delivery. At present, the instruments widely used for artificial rupture of membranes in obstetrics are mainly toothed forceps. The academic name of toothed forceps is Elis. Its structure is a metal product. The forceps head is a toothed clamp. When used, the amniotic membrane is first clamped and then pulled outward to rupture the amniotic membrane. However, from the perspective of clinical use, it mainly has the following three disadvantages: 1. The forceps head is a blunt metal head, and there is a large amount of secretion in the vaginal cervix, which will cause frequent slippage of the forceps and is not easy to operate. 2. In the current situation where the amount of amniotic fluid in the amniotic sac is small, the toothed forceps will cause the fetal hair to be clamped when clamping, resulting in neonatal scalp damage, increasing the possibility of medical disputes. 3. It requires two-handed operation, which is difficult for newcomers to operate and easy to damage the cervix.

[0003] Therefore, it is necessary to develop an auxiliary artificial rupture of membranes device that is more convenient and safer to operate. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an obstetric artificial rupture of membranes, which has an ingenious structure, a reasonable design, is safe and reliable, can better protect the fetal scalp from damage, is small and flexible, and is easy for medical staff to operate.

[0005] According to the technical solution provided by the present invention: an obstetric artificial membrane rupture device, characterized in that it includes a handle, a hard blunt head and a puncture straw, wherein two hard blunt heads in an "eight" shape and symmetrical are arranged at the front end of the handle, the front end of the hard blunt head is rounded and bends forward and toward the middle, and a gap is left between the two hard blunt heads for exposing the amniotic sac; the puncture straw is installed on the handle, the front end of the puncture straw extends to the gap, and the front end of the puncture straw is provided with a sloped puncture surface for hooking the amniotic sac; a cavity is arranged inside the handle, the puncture straw is a hollow structure, and the rear end of the inner hole of the puncture straw is sealed and connected with the front end of the cavity in the handle; a negative pressure suction port is arranged on the sloped puncture surface, the negative pressure suction port is connected with the inner hole of the puncture straw, the negative pressure suction port is closed with a water-soluble material, the inner hole of the puncture straw and the cavity of the handle are connected with each other and vacuumized to form negative pressure, and a transparent observation window for observing the cavity from the outside is arranged on the handle.

[0006] As a further improvement of the present invention, a display window is provided at the front end of the handle, and a pH test paper is provided in the display window.

[0007] As a further improvement of the present invention, a scale is provided on the surface of the handle.

[0008] As a further improvement of the present invention, the front end of the hard blunt tip is configured to be in a wide arc shape.

[0009] As a further improvement of the present invention, the rear end of the puncture straw is fixedly connected to the front end of the handle, the rear end of the inner hole of the puncture straw is sealed and connected to the front end of the cavity of the handle, and the rear end of the handle is installed with a vacuum joint connected to the cavity.

[0010] As a further improvement of the present invention, the puncture straw is inserted into the cavity and can move axially. A sealing ring is provided between the outer surface of the puncture straw and the cavity surface of the handle. The sealing ring enables the puncture straw to keep the cavity airtight when moving in the cavity. A locking piece for locking the puncture straw is installed on the handle.

[0011] As a further improvement of the present invention, the locking piece is a set screw, a limiting long groove is provided on the outer wall of the rear end of the puncture straw, the set screw is installed on the handle, and the inner end of the set screw is embedded in the limiting long groove and pressed against the outer wall of the puncture straw.

[0012] As a further improvement of the present invention, the water-soluble material is polyvinyl alcohol plastic.

[0013] As a further improvement of the present invention, the angle at which the front end of the hard blunt tip bends forward toward the middle is 40 to 50 degrees.

[0014] As a further improvement of the present invention, the angle at which the front end of the hard blunt tip bends forward toward the middle is 45°.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1) The invention has an ingenious structure, a reasonable design, a compact and flexible product, and is easy for medical personnel to operate. Since the hard blunt head at the front end of the membrane rupture device is rounded, it is not easy to cause damage when entering the birth canal, and can better protect the fetal scalp from being damaged, which is safe and reliable. After the fetal head is pushed up, the amniotic sac is exposed in the gap between the two hard blunt heads. Since the amniotic sac filled with amniotic fluid has tension, the amniotic sac will be exposed more clearly after the fetal head is pushed up. The doctor can operate the artificial membrane rupture device to slide forward slightly to hook the amniotic sac and complete the membrane rupture. After the membrane ruptures, the amniotic fluid flows out, and the water-soluble material at the negative pressure suction port dissolves after contacting the amniotic fluid, and the amniotic fluid can enter the cavity of the puncture straw and the handle through the negative pressure suction port, and the transparent observation window on the handle can conveniently observe the color and properties of the amniotic fluid.

[0017] 2) A display window is provided at the front end of the handle of the present invention, and a pH test paper is provided in the display window. During actual operation, the success of rupture of membranes can be further confirmed by observing the display window. In addition, since a scale is provided on the surface of the handle, the doctor can also conveniently observe the outflow of amniotic fluid.

[0018] 3) The puncture suction tube of the present invention can also move axially in the handle. When the membrane rupture fails once in clinical practice, the puncture suction tube can be slightly adjusted forward and then locked and fixed to ensure that the amniotic sac can be ruptured successfully. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural front view of embodiment 1 of the present invention.

[0020] Figure 2 This is a structural side view of Example 1 of the present invention.

[0021] Figure 3 for Figure 1 AA surface section view in.

[0022] Figure 4 This is a schematic diagram of the structure of Example 2 of the present invention.

[0023] Figure 5 for Figure 4 An enlarged schematic diagram of part B in FIG.

[0024] Explanation of the reference numerals: 1-handle, 2-hard blunt head, 3-puncture straw, 4-gap, 5-water-soluble material, 6-vacuum joint, 7-sealing ring, 8-setting screw, 11-cavity, 12-transparent observation window, 13-display window, 31-sloped puncture surface, 32-negative pressure suction port, 33-limiting long groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0026] Example 1

[0027] like Figure 1 to Figure 3As shown, embodiment 1 discloses an obstetric artificial membrane rupture device, comprising a handle 1, a hard blunt tip 2 and a puncture suction tube 3, wherein the front end of the handle 1 is provided with two hard blunt tips 2 symmetrically in an "eight" shape, the front ends of the hard blunt tips 2 are rounded and bent forward to the middle, and a gap 4 is left between the two hard blunt tips 2 for exposing the amniotic sac; the puncture suction tube 3 is installed on the handle 1, the front end of the puncture suction tube 3 extends to the gap 4, and the front end of the puncture suction tube 3 is provided with a sloped puncture surface 31 for hooking the amniotic sac; the handle 1 is provided with a cavity 11 inside, the puncture suction tube 3 is a hollow structure, and the rear end of the inner hole of the puncture suction tube 3 is sealed and connected with the front end of the cavity 11 in the handle 1; the slope puncture surface 31 is provided with a negative pressure suction port 32, the negative pressure suction port 32 is connected with the inner hole of the puncture suction tube 3, and the negative pressure suction port 32 is sealed with a water-soluble material 5. The inner hole of the puncture suction tube 3 and the cavity 11 of the handle 1 are connected with each other and vacuumized to form a negative pressure. The handle 1 is provided with a transparent observation window 12 for observing the cavity 11 from the outside.

[0028] During specific use, the pregnant woman takes the lithotomy position and routinely disinfects the vulva and vagina. The doctor inserts the index and middle fingers of his left hand into the vagina under aseptic operation, and enters the cervix to touch the amniotic sac under the guidance of the fingers in the vagina; then the doctor holds the artificial membrane rupture device in his right hand and enters the birth canal during the interval between uterine contractions [to avoid amniotic fluid embolism]. Since the front end of the hard blunt head 2 at the front end of the membrane rupture device is rounded, it is not easy to cause damage when entering the birth canal. The doctor pushes the fetal head up through the hard blunt head 2, and the amniotic sac is exposed in the gap 4 between the two hard blunt heads 2. Since the amniotic sac filled with amniotic fluid has tension, the amniotic sac will be exposed more clearly after the fetal head is pushed up. After pushing the fetal head up, the doctor operates the artificial membrane rupture device to slide slightly forward, and the sloped puncture surface 31 at the front end of the puncture suction tube 3 can hook the amniotic sac to complete the membrane rupture. After the membrane is ruptured, the amniotic fluid flows out, and the water-soluble material 5 at the negative pressure suction port 32 dissolves after contacting the amniotic fluid. Since the inner hole of the puncture suction tube 3 and the cavity 11 of the handle 1 have negative pressure, the amniotic fluid can enter the cavity of the puncture suction tube 3 and the handle 1 through the negative pressure suction port 32, and the doctor can conveniently observe the color and properties of the amniotic fluid through the transparent observation window 12 on the handle 1. After the membrane is ruptured, medical staff should also pay attention to whether the fetal heart rate has changed to prevent the umbilical cord from prolapse and pressure causing fetal distress, and record the time of membrane rupture; finally, disinfect the vulva, pad the perineum, and do basic care.

[0029] like Figure 1As shown, in this embodiment 1, the front end of the handle 1 is provided with a display window 13, and a pH test paper is provided in the display window 13. With such a configuration, it is also possible to further confirm whether the membrane is ruptured successfully by observing the display window 13. The pH test paper can measure the pH value. Under normal circumstances, since the pH value of the vagina should be maintained between 4.5 and 5.5, which is a weak acid, if the amniotic fluid is ruptured, this value can be increased to between 7.0 and 7.5. Therefore, by observing the pH at the display window 13, it is possible to accurately determine whether the membrane is ruptured successfully.

[0030] like Figure 1 As shown, in this embodiment 1, a scale is provided on the surface of the handle 1. With such a configuration, the doctor can also conveniently observe the outflow of amniotic fluid.

[0031] like Figure 1 to Figure 3 As shown, in this embodiment 1, the front end of the hard blunt head 2 is set to be a wide arc shape, so that there is a larger contact area when pushing up the fetal head, which can reduce the local pressure on the fetal head.

[0032] like Figure 1 , Figure 2 As shown, in this embodiment 1, the rear end of the puncture suction tube 3 is fixedly connected to the front end of the handle 1, the rear end of the inner hole of the puncture suction tube 3 is sealed and connected to the front end of the cavity 11 of the handle 1, and the rear end of the handle 1 is installed with a vacuum joint 6 connected to the cavity 11. In this way, during production, the water-soluble material 5 can be used to seal the negative pressure suction port 32 first, and then the vacuum joint 6 can be used to extract the air in the inner hole of the puncture suction tube 3 and the cavity 11 of the handle 1 to form a negative pressure, which is more convenient for production. The vacuum joint 6 can adopt a common joint with a switch in the prior art, or a joint with a one-way valve inside [such as the joint on the vacuum cupping device]. In this embodiment 1, the water-soluble material 5 is preferably made of polyvinyl alcohol plastic, and other products in the prior art can also be used.

[0033] like Figure 1 As shown, in this embodiment 1, the angle at which the front end of the hard blunt head 2 bends forward to the middle is preferably 40 to 50 degrees, preferably 45 degrees. Such an angle setting can effectively push the fetal head upward to expose the amniotic sac and protect the fetus.

[0034] In the present invention, the handle 1 is preferably made of a transparent material, so that the color and properties of the amniotic fluid can be observed more conveniently. The transparent material can be glass or plastic.

[0035] Example 2

[0036] like Figure 4 , Figure 5As shown, Example 2 discloses an obstetric artificial membrane rupture device, which differs from Example 1 in that: the puncture suction tube 3 is inserted into the cavity 11 and can move axially, a sealing ring 7 is arranged between the outer surface of the puncture suction tube 3 and the surface of the cavity 11 of the handle 1, and the sealing ring 7 can keep the cavity 11 airtight when the puncture suction tube 3 moves in the cavity 11, and a locking piece for locking the puncture suction tube 3 is installed on the handle 1. With such a configuration, the position between the puncture suction tube 3 and the hard blunt head 2 can be relatively fine-tuned. If a situation in which the membrane rupture fails once is encountered clinically, the puncture suction tube 3 can be fine-tuned forward and then locked and fixed to ensure that the sloped puncture surface 31 at the front end of the puncture suction tube 3 can smoothly hook the amniotic sac.

[0037] like Figure 5 As shown, in this embodiment 2, the locking member is a set screw 8, and a long position-limiting groove 33 is provided on the outer wall of the rear end of the puncture suction tube 3. The set screw 8 is mounted on the handle 1, and the inner end of the set screw 8 is embedded in the long position-limiting groove 33 and pressed against the outer wall of the puncture suction tube 3. With such a configuration, the puncture suction tube 3 can only move axially in the handle 1 but cannot rotate, ensuring that the sloped puncture surface 31 at the front end of the puncture suction tube 3 will not deflect, thereby avoiding affecting the operation of hooking and breaking the amniotic sac.

[0038] The above description is only a preferred embodiment of the present invention, and the above specific embodiment is not intended to limit the present invention. Various deformations and modifications may occur within the scope of the technical concept of the present invention, and any modification, modification or equivalent replacement made by a person of ordinary skill in the art based on the above description shall fall within the scope of protection of the present invention.

Claims

1. An obstetric artificial membrane rupture device, characterized in that: The invention comprises a handle (1), a hard blunt tip (2) and a puncture suction tube (3). The front end of the handle (1) is provided with two hard blunt tips (2) symmetrically arranged in an "eight" shape. The front ends of the hard blunt tips (2) are rounded and bent forward and toward the middle. A gap (4) is left between the two hard blunt tips (2) for exposing the amniotic sac. The puncture suction tube (3) is installed on the handle (1). The front end of the puncture suction tube (3) extends to the gap (4). The front end of the puncture suction tube (3) is provided with a sloped puncture surface (31) for hooking the amniotic sac. The handle (1) is provided with a cavity (11) inside. The puncture suction tube (3) is a hollow structure, and the rear end of the inner hole of the puncture suction tube (3) is sealed and connected to the front end of the cavity (11) in the handle (1); a negative pressure suction port (32) is provided on the slope puncture surface (31), and the negative pressure suction port (32) is connected to the inner hole of the puncture suction tube (3), and the negative pressure suction port (32) is sealed with a water-soluble material (5); the inner hole of the puncture suction tube (3) and the cavity (11) of the handle (1) are connected to each other and vacuumized to form a negative pressure, and a transparent observation window (12) is provided on the handle (1) for observing the cavity (11) from the outside.

2. The obstetric artificial membrane rupture device according to claim 1, characterized in that: A display window (13) is provided at the front end of the handle (1), and a pH test paper is provided in the display window (13).

3. The obstetric artificial membrane rupture device according to claim 1, characterized in that: The surface of the handle (1) is provided with scales.

4. The obstetric artificial membrane rupture device according to claim 1, characterized in that: The front end of the hard blunt tip (2) is configured to be in a wide arc shape.

5. The obstetric artificial membrane rupture device according to any one of claims 1 to 4, characterized in that: The rear end of the puncture suction tube (3) is fixedly connected to the front end of the handle (1), the rear end of the inner hole of the puncture suction tube (3) is sealed and connected to the front end of the cavity (11) of the handle (1), and the rear end of the handle (1) is installed with a vacuum joint (6) connected to the cavity (11).

6. The obstetric artificial membrane rupture device according to any one of claims 1 to 4, characterized in that: The puncture straw (3) is inserted into the cavity (11) and can move axially. A sealing ring (7) is provided between the outer surface of the puncture straw (3) and the surface of the cavity (11) of the handle (1). The sealing ring (7) enables the cavity (11) to be kept airtight when the puncture straw (3) moves in the cavity (11). A locking piece for locking the puncture straw (3) is installed on the handle (1).

7. The obstetric artificial membrane rupture device according to claim 6, characterized in that: The locking member is a set screw (8), and a long position-limiting groove (33) is provided on the outer wall of the rear end of the puncture suction tube (3). The set screw (8) is mounted on the handle (1), and the inner end of the set screw (8) is embedded in the long position-limiting groove (33) and pressed against the outer wall of the puncture suction tube (3).

8. The obstetric artificial membrane rupture device according to any one of claims 1 to 4, characterized in that: The water-soluble material (5) is polyvinyl alcohol plastic.

9. The obstetric artificial membrane rupture device according to any one of claims 1 to 4, characterized in that: The front end of the hard blunt tip (2) is bent forwards toward the middle at an angle of 40 to 50 degrees.

10. The obstetric artificial membrane rupture device according to claim 9, characterized in that: The front end of the hard blunt tip (2) is bent forwards toward the middle at an angle of 45°.

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