A midwifery device

Abstract

This application relates to the field of medical assistive devices and provides a delivery aid, including a hollow main body and a negative pressure head. The negative pressure head is connected and disposed on one side of the main body. A piston rod is slidably disposed inside the main body, with one end of the piston rod sealed and sliding inside the main body and the other end extending out of the main body. The device also includes a grip frame, a handle, and a limiting component. When traction is applied to the fetus, the handle is first pushed to the end closest to the main body, and the handle and grip frame are held together. The negative pressure head is then placed on the top of the fetus's head. The handle and grip frame are then gripped tightly, causing the handle to move the piston rod outward, creating negative pressure inside the negative pressure head and thus attracting the fetus's head. The limiting component limits the handle during the process to prevent the sealed head from springing back when released. The fetus can then be pulled outward directly. During the outward traction process, traction force is always applied through the handle, effectively reducing the occurrence of the negative pressure head falling off due to insufficient suction.

Description

Technical Field

[0001] This application relates to the field of medical assistive device technology, and more specifically, to a midwifery device. Background Technology

[0002] The content in this section provides only background information related to this application and may not constitute prior art.

[0003] Assisted delivery refers to a series of measures taken before and during labor to facilitate the smooth delivery of the fetus through the mother's birth canal. If labor progresses slowly after it begins, and an examination reveals abnormalities in the birth canal or the fetus, such as a tight perineum, a mother with heart disease who should not exert herself, or an abnormal fetal position, surgical procedures to resolve the delivery (such as vacuum extraction, forceps delivery, or breech extraction) may be used. When assisting with fetal delivery, especially when the fetal head is just emerging from the birth canal, it is difficult to grasp and pull, so a delivery instrument is needed to assist in traction.

[0004] In this technique, medical staff need to first use negative pressure to hold the delivery device and the baby's head in place, and then pull it outwards. During the traction process, the negative pressure may not be strong enough, causing the delivery device to fall off. This forces the doctor to repeat the negative pressure suction step, which inconveniences the medical staff. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a midwifery device that can at least partially solve the technical problem of doctors having to repeatedly perform negative pressure suction steps due to the midwifery device falling off.

[0006] The objective of this application is achieved through the following technical solution: An assisted delivery device includes a hollow main body, a negative pressure head, a grip frame, and a handle. The main body is a hollow tube with an internal sliding channel. The negative pressure head is a bowl-shaped hollow component connected to one end of the main body. The grip frame is located at the end of the main body away from the negative pressure head. A piston rod is slidably disposed within the main body, with one end of the piston rod sealed and sliding within the sliding channel of the main body, and the other end extending out of the main body. The handle is fixedly disposed at the extended end of the piston rod, and when the piston rod slides, the handle can move within the grip frame. A limiting component is also provided inside the grip frame to restrict the sliding of the handle within the grip frame. The limiting component includes a one-way rack and a locking tooth. The one-way rack is located on the inner wall of the grip frame along the sliding direction of the handle, and the locking tooth is located on the end side of the handle and can engage with the one-way rack.

[0007] Optionally, a vent hole is provided at the center of the negative pressure head, which is connected to the sliding channel of the main body. The vent hole and the sliding channel are arranged on the same axis, and the negative pressure head is connected to the main body through the vent hole. A baffle is provided at the end of the main body near the negative pressure head.

[0008] Optionally, the piston rod is rotatably disposed within the main body, and a torsion spring is sleeved on the piston rod, with one end of the torsion spring fixedly connected to the main body and the other end fixedly connected to the handle.

[0009] Optionally, the negative pressure head is provided with a pressure relief assembly, including a sealing plate, a mounting shell, and an elastic element. The negative pressure head has a pressure relief hole. The mounting shell is fixedly disposed on the outside of the negative pressure head. The sealing plate is movably disposed inside the negative pressure head. The elastic element passes through the pressure relief hole and is fixedly connected at one end to the sealing plate and at the other end to the mounting shell.

[0010] Optionally, the negative pressure head includes a suction cup and a sealing ring, the suction cup being fixedly connected to the main body, and the sealing ring being detachably disposed on the side of the suction cup away from the main body.

[0011] Optionally, the sealing ring has a flexible edge on the side away from the suction cup.

[0012] Furthermore, the tooth surface of the one-way rack has a helical tooth surface on one side and a straight tooth surface on the other side. The helical tooth surface of the one-way rack faces the side closer to the main body and slopes upward from the outside to the inside. The straight tooth surface of the one-way rack is the upper surface connected to the helical tooth surface and is a horizontal surface.

[0013] Furthermore, one side of the tooth surface of the locking tooth is a helical tooth surface and the other side is a straight tooth surface. The helical tooth surface of the locking tooth is in the same direction of inclination as the helical tooth surface of the one-way rack. The side of the locking tooth that is opposite to the one-way rack is a helical tooth surface, and the straight tooth surface of the locking tooth is the lower surface connected to the helical tooth surface, which is a horizontal surface.

[0014] Preferably, there are two locking teeth, which are slidably disposed at both ends of the handle. Sliding grooves are also provided at both ends of the handle along the length direction. A drive spring is provided in the sliding groove. One end of the drive spring is connected to the bottom wall of the sliding groove and the other end is connected to the locking tooth, which is used to drive the locking tooth to extend out of the sliding groove.

[0015] Optionally, a wavy finger pad is provided on the side of the handle near the main body along the length of the handle.

[0016] Optionally, an anti-slip pad is provided on the outer wall of the grip frame on the side away from the main body.

[0017] The above-mentioned technical solution provided in this application has the following beneficial effects: The obstetric device provided in this application allows for the following steps when traction is applied to the fetus: First, push the handle to the end closest to the main body. Then, grasp the handle and grip frame with your palm and fingers, place the negative pressure head on the fetus's head, and then tighten the handle and grip frame to move the piston rod outward. This creates negative pressure inside the negative pressure head, which then adheres to the fetus's head. The limiting component limits the handle during the process to prevent the sealing head from rebounding when released. Then, simply pull outward to traction the fetus. During the outward traction process, traction force is always applied through the handle. When the suction of the negative pressure head is insufficient, the traction force applied by the hand continues to pull the sealing head outward, further reducing the internal pressure of the negative pressure head until the suction of the negative pressure head can pull the fetus. This effectively reduces the occurrence of the negative pressure head falling off during traction due to insufficient suction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a midwifery apparatus according to an embodiment of this application is shown; Figure 2 A cross-sectional view of an embodiment of this application is shown; Figure 3 It shows Figure 2 Enlarged view of part A in the middle; Figure 4 A cross-sectional view of a midwifery apparatus according to another embodiment of this application is shown; Figure 5 A schematic diagram of a midwifery apparatus according to yet another embodiment of this application is shown.

[0020] Icons: 1-Main body; 2-Negative pressure head; 21-Suction cup; 22-Sealing ring; 23-Flexible edge; 3-Piston rod; 31-Sealing head; 4-Grip frame; 5-Handle; 51-Torsion spring; 6-Limiting component; 61-One-way rack; 62-Clamping tooth; 7-Pressure relief component; 71-Sealing plate; 72-Mounting shell; 73-Elastic component. Detailed Implementation

[0021] This application is described below with reference to the accompanying drawings and specific embodiments: As described in the background section of this application, in related technologies, medical staff need to first use negative pressure to hold the delivery device and the fetal head together, and then pull it outward. The inventors of this application have found that during the traction process, the negative pressure suction is often insufficient, causing the delivery device to fall off, which leads to the doctor having to repeat the negative pressure suction step, thus causing inconvenience to the medical staff.

[0022] Therefore, this application provides a delivery device, referring to... Figure 1 and Figure 2 It includes a hollow main body 1 and a negative pressure head 2. The main body 1 is a hollow cylindrical tube with a sliding channel coaxially arranged inside. The negative pressure head 2 is a bowl-shaped hollow part with an air hole at the center that communicates with the sliding channel of the main body 1. The air hole and the sliding channel are arranged coaxially.

[0023] A piston rod 3 is slidably disposed within the main body 1. A sealing head 31 is disposed at one end of the piston rod 3. The cross-sectional shape of the sealing head 31 is the same as that of the sliding channel. The sealing head 31 is slidably disposed within the main body 1 and is interference-fitted with the inner wall of the main body 1, thereby sealing and isolating the two sides of the sealing head 31 from each other during the sliding process. A baffle is disposed at the end of the main body 1 near the negative pressure head 2 to prevent the sealing head 31 from protruding when sliding towards the negative pressure head 2. In this embodiment, the sealing head 31 can be made of rubber, and the side wall of the sealing head 31 is configured as a multi-layer sheet structure, which improves the sealing effect while reducing the frictional resistance between the sealing head 31 and the main body 1.

[0024] A grip frame 4 is provided on the side of the main body 1 away from the negative pressure head 2. The grip frame 4 is symmetrically arranged along a plane containing the central axis of the main body 1. The grip frame 4 is a hollow frame body. A handle 5 is fixedly provided at the extended end of the piston rod 3. During the piston sliding process, the handle 5 moves within the hollow area of ​​the grip frame 4. The width of the hollow area in the middle of the grip frame 4 is less than the length of the piston rod 3, thereby preventing the piston rod 3 from sliding out of the main body 1 when it slides outward.

[0025] In this embodiment, the piston rod 3 is connected to the center of the handle 5, thereby making the grip frame 4 and the handle 5 symmetrical. In other embodiments, refer to... Figure 5 The grip frame 4 and the handle 5 can be eccentrically set, that is, the piston rod 3 is connected to one end of the handle 5, so that the grip frame 4 and the handle 5 are completely located on one side of the main body 1, which makes it easier for the operator to hold the device from a high position when the whole device is in a low position during use, and makes it easier to exert force.

[0026] The grip frame 4 is provided with a limiting component 6 to restrict the sliding of the handle 5. When the control handle 5 drives the piston rod 3 to slide outward, the limiting component 6 restricts the position of the handle 5 in real time, thereby preventing the piston rod 3 from sliding inward into the main body 1 when it is released.

[0027] The obstetric device provided in the above embodiment, when traction is applied to the fetus, first push the handle 5 to the end closest to the main body 1, then grasp the handle 5 and the grip frame 4 with the palm and fingers, place the negative pressure head 2 on the top of the fetus's head, and then tighten the handle 5 and the grip frame 4 so that the handle 5 drives the piston rod 3 to move outward, so that a negative pressure is formed in the negative pressure head 2 and thus sucks in the fetus's head. The limiting component 6 limits the handle 5 during the process to prevent the sealing head 31 from rebounding when the hand is released. Then, the fetus can be pulled outward directly. During the outward traction process, the hand always applies traction force through the handle 5. When the suction of the negative pressure head 2 is insufficient, the traction force applied by the hand continues to pull the sealing head 31 outward, thereby further reducing the pressure inside the negative pressure head 2 until the suction of the negative pressure head 2 can pull the fetus, effectively reducing the occurrence of the negative pressure head 2 falling off during the traction process due to insufficient suction.

[0028] In some embodiments, the limiting component 6 includes a one-way rack 61 and a locking tooth 62, wherein one side of the tooth surface of the one-way rack 61 is a helical tooth surface and the other side is a straight tooth surface. The one-way rack 61 is disposed on the inner wall of the grip frame 4 along the sliding direction of the handle 5. The helical tooth surface of the one-way rack 61 faces the side closer to the main body 1 and is inclined upward from the outside to the inside. The straight tooth surface of the one-way rack 61 is the upper surface connected to the helical tooth surface, specifically a horizontal surface.

[0029] In some embodiments, there are two locking teeth 62, which are slidably disposed at both ends of the handle 5. The locking teeth 62 can engage with the one-way rack 61. The tooth surface of the locking teeth 62 is also that one side is a helical tooth surface and the other side is a straight tooth surface. Specifically, the side of the locking teeth 62 that is opposite to the one-way rack 61 is a helical tooth surface, and the straight tooth surface of the locking teeth 62 is the lower surface connected to the helical tooth surface, which is a horizontal surface.

[0030] The inclined direction of the helical tooth surface of the locating tooth 62 is consistent with that of the helical tooth surface of the one-way rack 61, specifically as follows: Figure 4 As shown, the locking tooth 62 is adapted to the one-way rack 61 so that when the handle 5 moves away from the main body 1, the helical tooth surface of the locking tooth 62 slides into contact with the helical tooth surface of the one-way rack 61, and the locking tooth 62 can be inserted into and engaged in the tooth groove of the one-way rack 61. When the handle 5 moves closer to the main body 1, the straight tooth surface of the locking tooth 62 engages with the straight tooth surface of the one-way rack 61, so that the straight tooth surface of the lower surface of the locking tooth 62 overlaps the straight tooth surface of the upper surface of the one-way rack 61, thereby restricting the sliding of the handle 5.

[0031] Preferred, refer to Figure 4Two locking teeth 62 are slidably disposed at both ends of the handle 5. Sliding grooves are provided at both ends of the handle 5 along the length direction. A drive spring is provided in the sliding groove. One end of the drive spring is connected to the bottom wall of the sliding groove and the other end is connected to the locking teeth 62. The drive spring is used to drive the locking teeth 62 to extend out of the sliding groove. When the handle 5 slides away from the main body 1, the locking teeth 62 are driven by the inclined surface of the one-way rack 61 to overcome the elastic force of the drive spring and slide into the sliding groove, so as to avoid obstructing the handle 5. When the handle 5 moves to the notch of the one-way rack 61, the drive spring drives the locking teeth 62 to extend and engage with the straight tooth surface of the one-way rack 61, thereby restricting the sliding of the handle 5 and reducing the resistance of the one-way rack 61 to the locking teeth 62 when the handle 5 is pulled.

[0032] Preferably, two sets of limiting components 6 can be provided, with the two sets of limiting components 6 respectively disposed on both sides of the grip frame 4, so that the limiting effect at both ends of the handle 5 is the same, improving the stability of the entire device. In some other embodiments, refer to Figure 4 The limiting component 6 can also be set as a set. For example, when the grip frame 4 and the handle 5 are eccentrically set, the limiting component 6 can be set on the side of the handle 5 closer to the piston rod 3, so that the resistance of the locking tooth 62 when it is limited is closer to the torque of the piston rod 3, thus avoiding the piston rod 3 from being eccentric and improving the stability of the whole device.

[0033] In some embodiments, refer to Figure 2 and Figure 3 Both the piston rod 3 and the sealing head 31 are cylindrical, meaning they are rotatably mounted inside the main body 1. A torsion spring 51 is fitted onto the piston rod 3, with one end fixedly connected to the main body 1 and the other end fixedly connected to the handle 5. Before use, the handle 5 can be pushed towards the side closest to the main body 1 to drive the piston rod 3 and the sealing head 31 to slide inward and compress the torsion spring 51. When the negative pressure head 2 contacts the fetal head, the handle 5 is released. During the reset process, the torsion spring 51 drives the handle 5 to move the piston rod 3 and the sealing head 31. 31 moves outward, generating initial negative pressure inside the negative pressure head 2. At this time, even if the hand is released, the negative pressure head 2 can still adhere to the fetus's head, preventing the entire device from accidentally falling off. During use, the torsion spring 51 limits the piston rod 3 axially, preventing the piston rod 3 from rotating and causing the handle 5 to shift and detach from the grip frame 4. After use, the handle 5 can be rotated to disengage the locking teeth 62 on the handle 5 from the one-way rack 61, releasing the limitation on the handle 5, thereby automatically releasing the negative pressure state and returning the handle 5 to its original position, making the entire operation process more convenient.

[0034] In other embodiments, when the cross-sections of the main body 1 and the sealing head 31 are not circular, the piston rod 3 and the sealing head 31 can be rotatably connected along the central axis, which can also achieve the above-mentioned effect.

[0035] In other embodiments, the torsion spring 51 may also be disposed inside the main body 1, with one end of the torsion spring 51 fixedly connected to the piston rod 3 or the sealing head 31, and the other end fixedly connected to the inner sidewall of the main body 1.

[0036] In some embodiments, the negative pressure head 2 is provided with a pressure relief assembly 7, including a sealing plate 71, a mounting shell 72, and an elastic element 73. The negative pressure head 2 has a pressure relief hole. The mounting shell 72 is fixedly disposed on the outside of the negative pressure head 2. The sealing plate 71 is movably disposed inside the negative pressure head 2. The elastic element 73 passes through the pressure relief hole and is fixedly connected at one end to the sealing plate 71 and at the other end to the mounting shell 72. The elastic element 73 can be a tension spring. In its natural state, the elastic element 73 applies tension to the sealing plate 71 so that the sealing plate 71 always fits against the inner wall of the negative pressure head 2, sealing the pressure relief hole. During use, when the internal negative pressure of the negative pressure head 2 is too large, the external pressure overcomes the tension of the elastic element 73 and pushes the sealing plate 71 inward to relieve pressure, thereby avoiding damage to the fetal head caused by excessive internal negative pressure.

[0037] In some embodiments, the negative pressure head 2 includes a suction cup 21 and a sealing ring 22. The sealing ring 22 can be made of silicone or other skin-friendly soft materials. The suction cup 21 is fixedly connected to the main body 1. The sealing ring 22 is detachably disposed on the side of the suction cup 21 away from the main body 1. Specifically, the end of the suction cup 21 away from the main body 1 is provided with threads, and the end of the sealing ring 22 is provided with threads that are compatible with it. The sealing ring 22 is a disposable medical device. When the sealing ring 22 needs to be replaced, the sealing ring 22 can be unscrewed to replace it with a new sealing ring 22, so that the device can be reused without replacing the entire device. In other embodiments, the suction cup 21 and the sealing ring 22 can also be connected by other means such as sleeve connection.

[0038] In some embodiments, a flexible edge 23 is provided on the side of the sealing ring 22 away from the suction cup 21. The flexible edge 23 is made of a thin soft film material and is provided on the outer wall of the sealing ring 22. When the negative pressure head 2 comes into contact with the fetal head, the flexible edge 23 first contacts the head and fits fully. After a negative pressure is generated inside the negative pressure head 2, if there is a gap between the sealing ring 22 and the head, the thin flexible edge 23 at the gap is absorbed by the negative pressure, thereby sealing the gap and further improving the sealing effect of the negative pressure head 2 during use.

[0039] In some embodiments, a wave-shaped finger pad is provided on the side of the handle 5 near the main body 1 along the length of the handle 5. Its shape is adapted to the ergonomics of the fingers, making it easy for medical staff to hold and apply grip force. An anti-slip soft pad is provided on the outer wall of the grip frame 4 away from the main body 1. The shape of the anti-slip soft pad is adapted to the ergonomics of the palm, making it easy for medical staff to hold. Both the anti-slip soft pad and the finger pad can be made of silicone or rubber. The surface of the anti-slip soft pad and the finger pad is provided with anti-slip texture to prevent medical staff from slipping when their hands are contaminated with amniotic fluid, blood or other liquids, further improving the practicality of the entire device.

[0040] During use, when the fetal head is 3 cm or less below the ischial spine, the vacuum extraction device proposed in this application can be used. First, push the handle 5 to the end closest to the main body 1. Then, grasp the handle 5 and the grip frame 4 with your palm and fingers, and place the negative pressure head 2 on the top of the fetal head, so that the outer ring of the negative pressure head 2 fits tightly against the fetal head. Then, release the handle 5. Under the action of the torsion spring 51, the handle 5 drives the sealing head 31 to automatically return to its original position through the piston rod 3, thereby generating the initial negative pressure suction of the negative pressure head 2. Then, adjust the posture and grip the handle 5 and the grip frame 4 tightly so that the handle 5 drives the piston rod 3. The negative pressure head 2 is moved outward, creating negative pressure inside and thus sucking in the fetal head. The limiting component 6 limits the handle 5 during the process to prevent the sealing head 31 from rebounding when released. Then, the fetus can be pulled outward directly. During the outward pulling process, the hand always applies traction force through the handle 5. When the suction of the negative pressure head 2 is insufficient, the traction force applied by the hand continues to pull the sealing head 31 outward, thereby further reducing the pressure inside the negative pressure head 2 until the suction of the negative pressure head 2 can pull the fetus outward. This effectively reduces the occurrence of the negative pressure head 2 falling off during the traction process due to insufficient suction.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A midwifery device, comprising a hollow main body, a negative pressure head, a grip frame, and a handle, wherein the main body is a hollow tube with an internal sliding channel, the negative pressure head is a bowl-shaped hollow component, the negative pressure head is connected to one end of the main body, and the grip frame is located at the end of the main body away from the negative pressure head, characterized in that: A piston rod is slidably arranged in the main body, one end of the piston rod is sealed and slid in the sliding channel of the main body, and the other end of the piston rod extends out of the main body; a handle is fixedly arranged at the extending end of the piston rod, and the handle can move in the grip frame when the piston rod slides; A limiting assembly is further arranged in the grip frame to limit the sliding of the handle in the grip frame, the limiting assembly comprises a one-way rack and a toothed catch, the one-way rack is arranged on the inner wall of the grip frame along the sliding direction of the handle, and the toothed catch is arranged at the end side of the handle and can be engaged with the one-way rack.

2. The midwifery device of claim 1, wherein: A gas hole is arranged at the center position of the negative pressure head and is in communication with the sliding channel of the main body, the gas hole is coaxially arranged with the sliding channel, and the negative pressure head is in communication with the main body through the gas hole; a baffle is arranged at the end of the main body close to the negative pressure head.

3. The midwifery device of claim 2, wherein: The piston rod is rotatably arranged in the main body, a torsional spring is arranged on the piston rod, one end of the torsional spring is fixedly connected with the main body, and the other end of the torsional spring is fixedly connected with the handle.

4. The midwifery device of claim 1, wherein: A pressure relief assembly is arranged on the negative pressure head, the pressure relief assembly comprises a sealing sheet, a mounting shell and an elastic member, a pressure relief hole is arranged on the negative pressure head, the mounting shell is fixedly arranged on the outer side of the negative pressure head, the sealing sheet is movably arranged in the negative pressure head, and the elastic member passes through the pressure relief hole and is fixedly connected with the sealing sheet at one end and with the mounting shell at the other end.

5. The midwifery device of claim 1, wherein: The negative pressure head comprises a suction disc and a sealing ring, the suction disc is fixedly connected with the main body, and the sealing ring is detachably arranged on the side of the suction disc away from the main body.

6. The midwifery device of claim 5, wherein: The side of the sealing ring away from the suction disc is provided with a flexible edge.

7. The midwifery device of claim 1, wherein: The tooth surface of the one-way rack is inclined on one side and straight on the other side, the inclined surface of the one-way rack faces the side close to the main body and is inclined upward from the outer side to the inner side, and the straight surface of the one-way rack is an upper surface connected with the inclined surface and is a horizontal surface.

8. The midwifery device of claim 7, wherein: The tooth surface of the toothed catch is inclined on one side and straight on the other side, the inclined surface of the toothed catch is consistent with the inclined direction of the inclined surface of the one-way rack, the surface of the toothed catch relative to the one-way rack is an inclined surface, and the straight surface of the toothed catch is a lower surface connected with the inclined surface and is a horizontal surface.

9. The midwifery device of claim 8, wherein: The toothed catch is provided with two toothed catches, the two toothed catches are slidably arranged at the two ends of the handle, sliding grooves are further arranged at the two ends of the handle along the length direction, driving springs are arranged in the sliding grooves, one end of the driving spring is connected with the bottom wall of the sliding groove, and the other end of the driving spring is connected with the toothed catch, so as to drive the toothed catch to extend out of the sliding groove.

10. The midwifery device of claim 1, wherein: A wave-shaped finger pad is arranged on the side of the handle close to the main body along the length direction of the handle.

Images