Obstetric fetal head suction midwifery device

Abstract

The present invention discloses an obstetric fetal head suction assistance device, comprising a suction head and an air extraction part, the air extraction part comprising a cylinder and an air extraction member, the air extraction member comprising a piston and a handle, the handle extending out of the cylinder, the piston dividing the inner cavity of the cylinder into a first cavity and a second cavity, the trachea being arranged outside the first end of the cylinder, the first end plate of the cylinder being arranged in a first flow channel, the first flow channel being provided with a first control component for controlling the air flow rate entering the first cavity through the first flow channel to prevent air oscillation in the inner cavity of the trachea, the second end plate of the cylinder being provided with a second control component for controlling the air flow rate of gas entering and exiting the second cavity from the outside to prevent air oscillation in the trachea; the present invention is provided with a control component for preventing the air from entering and exiting the second cavity at too fast a speed, so that the device can slowly stop when the air intake is finished, and can first slowly and then quickly when the air is deflated, thereby avoiding the air oscillation in the suction head causing fetal brain injury, and has strong practicality and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an obstetric fetal head suction delivery device. Background Art

[0002] In the obstetrics department of a hospital, when medical staff have difficulty delivering a newborn, they often need to use a fetal head vacuum to assist in delivery. The fetal head vacuum consists of a suction head and a vacuum device. The vacuum device creates negative pressure on the suction head to suck the fetal head, and then pulls the fetus outward to assist in delivery. However, when the vacuum device is pumping air, the air intake often maintains the same speed from beginning to end. When the air intake suddenly stops, it may cause air oscillations in the suction head. During the deflation process, a large amount of air will enter the suction head at the moment the air outlet opens, which will also cause air oscillations in the suction head. Since the fetal skull is very soft and the head is very fragile, such air oscillations can cause fetal brain damage. For this reason, we propose an obstetric fetal head vacuum delivery device. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide an obstetric fetal head suction delivery device, which is equipped with a control component to prevent the gas from entering and exiting at too fast a speed, so that the device can slowly stop when the air intake is completed, and can first slowly and then quickly when the air is deflated, thereby avoiding the air shock in the suction head causing fetal brain injury, and has strong practicality and safety.

[0004] To solve the above technical problems, the present invention adopts a technical solution: providing an obstetric fetal head suction-assisted delivery device, comprising a suction head and a suction part, the suction head and the suction part being connected by an air tube, the suction part comprising a cylinder with closed ends and an air suction member, the air suction member comprising a piston sealingly and slidingly connected to the inner cavity of the cylinder and a handle fixedly connected to the piston, the end of the handle away from the piston extending from the second end of the cylinder along the axial direction of the cylinder, the piston dividing the inner cavity of the cylinder into a first cavity near the first end of the cylinder and a second cavity near the second end of the cylinder, the air tube being arranged outside the first end of the cylinder, a first flow channel connecting the first cavity with the air tube being arranged in the first end plate of the cylinder, a first control component being arranged in the first flow channel for automatically controlling the air flow rate entering the first cavity through the first flow channel to prevent air oscillation in the inner cavity of the air tube, and a second control component being arranged on the second end plate of the cylinder for controlling the air flow rate from the outside of the cylinder into and out of the second cavity to prevent air oscillation in the inner cavity of the air tube.

[0005] Furthermore, the first flow channel includes a horizontally arranged cross channel, the first end of the cross channel is connected to the first cavity, the second end of the cross channel is a blind end, the second end of the cross channel is provided with an air vent that connects the inner cavity of the cross channel with the external space of the first end plate, and the first air inlet channel that connects the cross channel with the trachea is provided in the first end plate, and the inner diameter of the first air inlet channel is smaller than the inner diameter of the cross channel.

[0006] Furthermore, the first control component includes a first slide column that is sealingly and slidingly connected to the inner wall of the cross channel and a first spring that connects the second end of the first slide column to the blind end of the cross channel. The first slide column is arranged near the first end of the cross channel, and a slow-flow air duct is arranged in the first slide column. The first end of the slow-flow air duct passes through the first end face of the first slide column, and the second end of the slow-flow air duct passes through the cylindrical surface of the first slide column toward the trachea. When the first slide column overcomes the elastic force of the first spring and slides a certain distance toward the first end of the cross channel, the first slide column blocks the first intake duct and connects the second end of the slow-flow air duct with the first intake duct.

[0007] Furthermore, the first end of the cross channel is set as an L-shaped channel, the first end of the L-shaped channel is vertically set and connected to the first cavity, the second end of the L-shaped channel is coaxially set with the cross channel and connected to the cross channel, and the inner diameter of the L-shaped channel is smaller than the inner diameter of the cross channel.

[0008] Furthermore, the first control component also includes a sliding plate slidably arranged between the first sliding column and the blind end of the first sliding groove, and a screw rod coaxially arranged with the first sliding groove, the first end of the screw rod is fixedly connected to the sliding plate, the second end of the screw rod extends out of the first end plate, and the screw rod is threadedly connected to the first end plate.

[0009] Furthermore, one end of the first spring is fixedly connected to the first sliding column, and the other end of the first spring is fixedly connected to the sliding plate. An annular groove communicating with the slow-flow airway is provided on the cylindrical surface of the first sliding column.

[0010] Furthermore, a second flow channel and an air inlet are provided in the second end plate to connect the second cavity with the external space of the cylinder. A one-way valve is provided on the air inlet to only allow gas to flow from the second cavity to the external space of the cylinder. The second control component is provided in the second flow channel to control the flow rate of gas entering the second cavity through the second flow channel.

[0011] Furthermore, the second flow channel includes a receiving cavity, an exhaust channel connecting the receiving cavity with the second cavity, and a second air inlet channel connecting the receiving cavity with the external space of the cylinder, and an end of the second air inlet channel close to the receiving cavity is configured as a tapered hole that diffuses toward the receiving cavity;

[0012] The second control assembly includes a cylinder formed in the accommodating cavity, a buffer provided in the cylinder, a second slide column coaxially arranged with the second air intake duct, and a cover body provided outside the second end plate for opening / closing the second air intake duct. The upper end of the cylinder is open, the first end of the second slide column is configured as a cone that cooperates with the tapered hole on the second air intake duct, the second end of the second slide column is located in the cylinder, and the buffer component is provided below the second slide column and contacts the second slide column.

[0013] Furthermore, the buffer component includes a hollow elastic ball, and the inner cavity of the elastic ball is filled with a non-Newtonian fluid.

[0014] Furthermore, a second spring coaxial with the second slide post is provided in the elastic ball. Under the elastic force of the second spring, the elastic ball contacts the second slide post and makes the conical body of the first end of the second slide post fit into the conical hole on the second intake passage.

[0015] The obstetric fetal head suction delivery device of the present invention has at least the following beneficial effects: a first control component is provided on the trachea for controlling the air flow rate entering the first cavity through the first flow channel to prevent air shock from occurring in the inner cavity of the trachea; and a second control component is provided for controlling the air flow rate entering and exiting the second cavity from the outside of the cylinder to prevent air shock from occurring in the inner cavity of the trachea. This can protect the fragile skull of the fetus and avoid craniocerebral injury caused by air shock, thereby effectively improving the practicality and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 This is a structural schematic diagram of an obstetric fetal head suction device according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of an embodiment of an obstetric fetal head suction device according to the present invention. Figure 1 ;

[0019] Figure 3 This is a cross-sectional view of an embodiment of an obstetric fetal head suction device according to the present invention. Figure 2 ;

[0020] Figure 4 for Figure 2 Schematic diagram of the local structure at A in the middle;

[0021] Figure 5 for Figure 3 Schematic diagram of the local structure at point B.

[0022] The meanings of the reference numerals in the accompanying drawings are:

[0023] Suction head 1, first end 11, second end 12;

[0024] Air extraction unit 2, cylinder 21, first end plate 211, second end plate 212, first cavity 213, second cavity 214, first flow channel 22, transverse channel 221, first air inlet channel 222, L-shaped channel 223, second flow channel 23, accommodating chamber 231, exhaust channel 232, second air inlet channel 233, air inlet hole 24, one-way valve 25, piston 26, vertical rod 27, transverse rod 28;

[0025] Trachea 31, sealing tube 32, air pressure gauge 33;

[0026] First control assembly 4, first sliding post 41, sliding plate 42, first spring 43, screw 44, knob 45, slow flow passage 46, annular groove 47;

[0027] The second control assembly 5 , the cylinder 51 , the second sliding column 52 , the cover 53 , the elastic ball 54 , the second spring 55 , and the non-Newtonian fluid 56 . DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Please refer to Figures 1 to 3 The present invention provides an obstetric fetal head suction assistance device, comprising a suction head 1, an air extraction part 2, and an air tube 31 for connecting the suction head 1 and the air extraction part 2; the suction head 1, the air extraction part 2, and the air tube 31 are all coaxially arranged.

[0030] The suction head 1 includes a first end 11 that directly contacts the fetal head and a second end 12 that is away from the fetal head. The air extraction unit 2 and the trachea 3 are both located at the second end 12 of the suction head 1. The trachea 31 is provided with a barometer 33 for detecting the internal air pressure.

[0031] The air extraction part 2 includes a cylinder 21 with closed ends and an air extraction member arranged in the cylinder 21, the end of the cylinder 21 close to the suction head 1 is the first end, and the end away from the suction head 1 is the second end. A first end plate 211 is provided at the first end of the cylinder 21 for sealing the first end of the cylinder 21, and a second end plate 212 is provided at the second end of the cylinder 21 for sealing the second end of the cylinder 21. The air extraction member includes a piston 26 that is sealingly and slidingly connected to the inner cavity of the cylinder 21 and a handle fixedly connected to the piston 26. The piston 26 divides the cavity into a first cavity 213 that is closer to the first end plate 211 and a second cavity 214 that is closer to the second end plate 212. In the illustrated embodiment, the handle is defined as a cross-shaped handle formed by a vertical rod 27 and a horizontal rod 28. The vertical rod 27 is installed on the side of the piston 26 close to the second end plate 212 and extends outward through the second end plate 212. The vacuum component also includes a sealing tube 32 fixedly connected to the second end plate 212. The sealing tube 32 is used to increase the sealing performance of the vertical rod 27 to prevent air leakage in the second cavity 214. The vertical rod 27 is sealed and slidably connected to the sealing tube 32 and extends outward from the sealing tube 32. The horizontal rod 28 is horizontally arranged on the part of the vertical rod 27 extending out of the sealing tube 32.

[0032] The first end plate 211 of the barrel 21 is connected to the end of the air tube 31 away from the nozzle 1. A first flow channel 22 is defined within the first end plate 211. A first control assembly 4 is provided within the first flow channel 22 for automatically controlling the rate of airflow entering the first cavity 213 through the first flow channel 22 to prevent air oscillation within the cavity of the air tube 31. A second flow channel 23 is defined within the second end plate 212 of the barrel 21, which communicates with the outside world. The lower end of the second flow channel 23 communicates with the second cavity 214, and the upper end of the second flow channel 23 communicates with the outside world of the barrel 21. A second control assembly 5 is provided within the second flow channel 23 for controlling the rate of airflow from the outside of the barrel 21 into and out of the cavity to prevent air oscillation within the cavity of the air tube 31. The second end plate 212 of the barrel 21 defines an air inlet 24, which communicates with the outside world. A one-way valve 25 is provided on the air inlet 24, which only allows air to flow from the second cavity 214 to the outside of the barrel 21. For details, please refer to Figure 4The first flow channel 22 includes a horizontally arranged cross-section of a circular cross-section, a first air inlet channel 222 connecting the cross-section 221 with the air pipe 31, an air vent provided at one end of the cross-section 221 and connected to the outside of the first end plate 211, and an L-shaped channel 223 provided at the other end of the cross-section 221. For ease of description, the end of the cross-section 221 provided with the first air inlet channel 222 is defined as the first end, and the end away from the first air inlet channel 3222 is defined as the second end. The first air inlet channel 222 is provided at the lower end of the cross-section 221 and passes downward through the first end plate 211 to connect with the air pipe 31. The L-shaped channel 223 is provided at the first end of the cross-section 221 and has an inner diameter smaller than that of the cross-section 221. Its vertical portion extends upward to connect with the first cavity 213, and its horizontal portion is coaxial with the cross-section 221 and connected with the first end of the cross-section 221. The location where the horizontal channel 221 connects to the L-shaped channel 223 is provided with a tapered hole that converges toward the L-shaped channel 223. The second end of the horizontal channel 221 is a blind end, and the air vent is provided at the second end of the horizontal channel 221 and passes through the first end plate 211 along the length of the horizontal channel 221.

[0033] The first control assembly 4 includes a first slide 41 that slides sealingly against the inner wall of the transverse channel 221, a sliding plate 42 that slides within the transverse channel 221, a first spring 43 disposed between the first slide 41 and the sliding plate 42, a screw 44 rotatably connected to the sliding plate 42, and a knob 45 disposed at the end of the screw 44 distal from the sliding plate 42. The first slide 41 slides sealingly against the first end of the transverse channel 221 and is located on the side of the first intake passage 222 distal from the L-shaped tube. The end of the first slide 41 proximal to the L-shaped channel 223 is configured as a cone that mates with the first tapered hole, while the end distal from the L-shaped channel 223 maintains a sealed sliding relationship with the transverse channel 221. A slow-flow passage 46 is defined within the first slide 41. One end of the slow-flow passage 46 extends through the end surface of the first slide 41 proximal to the L-shaped channel 223, while the other end extends through the cylindrical surface of the first slide 41 toward the first air pipe 313. An annular groove 47 is formed on the cylindrical surface of the first slide post 41, communicating with the slow-flow passage 46. The first spring 43 is disposed on the side of the first slide post 41 facing the second end of the cross channel 221. The sliding plate 42 is defined as a circular plate that matches the cross-sectional shape of the cross channel 221. The sliding plate 42 slides between the first spring 43 and the second end of the cross channel 221. One end of the first spring 43 is fixedly connected to the first slide post 41, and the other end of the first spring 43 is fixedly connected to the sliding plate 42. The screw 44 is coaxially disposed on the side of the sliding plate 42 away from the first spring 43 and extends outward through the first end plate 211. The screw 44 is threadedly connected to the first end plate 211. The knob 45 is mounted on the end of the screw 44 that extends beyond the first end plate 211.

[0034] Please refer to Figure 5 The second flow channel 23 includes a accommodating chamber 231, an exhaust channel 232 connecting the accommodating chamber 231 with the second cavity 214, and a second air inlet channel 233 connecting the accommodating chamber 231 with the exterior of the barrel 21. The exhaust channels 232 are provided at the lower end of the accommodating chamber 231 and are defined as a plurality of exhaust channels 232 evenly spaced about the center of the accommodating chamber 231. The second air inlet channel 233 is coaxially provided at the upper end of the accommodating chamber 231, and the end thereof adjacent to the accommodating chamber 231 is configured as a tapered hole that diffuses toward the accommodating chamber 231.

[0035] The second control assembly 5 includes a cylinder 51 formed within the accommodating cavity 231, a buffer member disposed within the cylinder 51, a second spool 52 disposed at a position corresponding to the second intake passage 233, and a cover 53 disposed on the outside of the second end plate 212 for opening and closing the opening of the second intake passage 233. The cylinder 51 is disposed in the middle of the bottom of the accommodating cavity 231 and has an open center portion at its upper end. The lower end of the second spool 52 extends downwardly into the cylinder 51 and contacts the upper end of the buffer member. The upper end of the second spool 52 extends upwardly into the second intake passage 233. The upper end of the second spool 52 is configured as a cone that mates with the tapered hole in the second intake passage 233.

[0036] The buffer comprises a hollow elastic ball 54, a second spring 55 disposed inside the elastic ball 54, and a non-Newtonian fluid 56 filled in the elastic ball 54. The second spring 55 is coaxially arranged with the second sliding post 52, and its upper and lower ends are fixedly connected to the inner wall of the elastic ball 54.

[0037] One embodiment of an obstetric fetal head suction delivery device of the present invention works as follows: the first end portion 11 of the suction head 1 is placed in contact with the fetal head, the handle is held and pulled away from the suction head 1, and the vertical rod 27 drives the piston 26 to move in the same direction within the inner cavity of the cylinder 21. Under the action of the suction component, the gas in the suction head 1 enters the first cavity 213 through the trachea 31, the first air inlet 222, the horizontal channel 221, and the L-shaped channel 223. At this time, the gas in the second cavity 214 is discharged outward through the one-way valve 25. When the user is pumping air, the user can observe the pressure gauge 33 to know the air pressure inside the trachea 31. As the negative pressure in the first flow channel 22 continues to increase, the first sliding column 41 overcomes the elastic force of the first spring 43 and gradually moves in the direction close to the L-shaped channel 223 in the horizontal channel 221 until the first air inlet channel 222 is blocked. At this time, the slow-flow air channel 46 is connected with the first air pipe 313, and the air enters the L-shaped channel 223 through the slow-flow air channel 46 and then enters the first cavity 213. Since the inner diameter of the slow-flow air channel 46 is smaller than the inner diameter of the first air pipe 313, the air intake rate from the air pipe 31 into the first cavity 213 will be reduced at this time, thereby preventing the sudden stop of air intake from causing air vibration inside the suction head 1.

[0038] The negative pressure requirements for the suction head 1 vary in different usage scenarios. When the negative pressure is low, it may be difficult for the first slide 41 to overcome the elastic force of the first spring 43 and move; when the negative pressure is high, the first slide 41 may prematurely block the first air inlet 222, causing slow air intake and affecting the normal progress of delivery. In this case, the requirements under different negative pressure conditions can be met by changing the position of the spring. That is, the knob 45 is rotated to drive the screw 44 to rotate and move along the length of the horizontal channel 221. The screw 44 drives the sliding plate 42 to rotate in the horizontal channel 221 and move along the length of the horizontal channel 221, causing the spring to move closer to / away from the first slide 41, so that the first slide 41 can slide more effortlessly / laboriously to block the first air inlet 222.

[0039] When deflation is required, the cover 53 is opened, and external air enters through the second air inlet 233 and presses the second slide column 52 downward. Since the non-Newtonian fluid 56 has the material properties of being solid when squeezed quickly and being liquid when squeezed slowly, the second slide column 52 cannot be squeezed quickly to deform the elastic ball 54 at the moment the cover 53 is opened. The elastic ball 54 can only deform slowly to open the second air inlet 233 slowly instead of quickly, so that the gas enters slowly and then quickly, preventing the piston 26 from moving downward quickly and causing the air in the suction head 1 to vibrate. At this time, the second spring 55 is in a compressed state. When the piston 26 moves back to its initial position, the second slide column 52 moves upward under the rebound force of the second spring 55 to block the second air inlet 233.

[0040] Compared with the prior art, the obstetric fetal head suction delivery device of the present invention is provided with a first control component on the trachea for controlling the air flow rate entering the first cavity through the first flow channel to prevent air shock from occurring in the inner cavity of the trachea. A second control component is also provided for controlling the air flow rate entering and exiting the second cavity from the outside of the cylinder to prevent air shock from occurring in the inner cavity of the trachea. This can protect the fragile skull of the fetus and avoid craniocerebral injury caused by air shock, thereby effectively improving the practicality and safety of the device.

Claims

1. An obstetric fetal head suction device, comprising a suction head and a suction unit, the suction head and the suction unit being connected via an endotracheal tube, characterized in that: The air pumping part includes a cylinder body with closed ends and an air pumping member, the air pumping member includes a piston that is sealingly and slidably connected to the inner cavity of the cylinder body and a handle fixedly connected to the piston, one end of the handle away from the piston extending from the second end of the cylinder body along the axial direction of the cylinder body, the piston dividing the inner cavity of the cylinder into a first cavity near the first end of the cylinder body and a second cavity near the second end of the cylinder body, the air pipe is arranged outside the first end of the cylinder body, a first flow channel is arranged in the first end plate of the cylinder body to connect the first cavity with the air pipe, the first flow channel is provided with a first control component that automatically controls the air flow rate entering the first cavity through the first flow channel to prevent air oscillation in the inner cavity of the air pipe, and the second end plate of the cylinder body is provided with a second control component for controlling the air flow rate of gas entering and exiting the second cavity from the outside of the cylinder to prevent air oscillation in the inner cavity of the air pipe; the first flow channel includes a horizontally arranged cross channel, the first end of the cross channel is connected to the first cavity, the second end of the cross channel is a blind end, the second end of the cross channel is provided with an air vent that connects the inner cavity of the cross channel with the external space of the first end plate, and the first end plate is provided with a second control component that connects the cross channel with the air pipe An air intake passage, the inner diameter of the first air intake passage is smaller than the inner diameter of the cross passage; the first control assembly includes a first slide column that is sealingly and slidingly connected to the inner wall of the cross passage and a first spring that connects the second end of the first slide column to the blind end of the cross passage, the first slide column is arranged near the first end of the cross passage, a slow flow air passage is arranged in the first slide column, the first end of the slow flow air passage passes through the first end surface of the first slide column, and the second end of the slow flow air passage passes through the cylindrical surface of the first slide column toward the direction of the trachea, when the first slide column overcomes the elastic force of the first spring and slides a certain distance toward the first end of the cross passage When the cam is released, the first slide column blocks the first air inlet duct and connects the second end of the slow-flow air duct with the first air inlet duct; the first control component also includes a sliding plate slidably arranged between the first slide column and the blind end of the cross channel and a screw rod coaxially arranged with the cross channel, the first end of the screw rod is fixedly connected to the sliding plate, the second end of the screw rod extends out of the first end plate, and the screw rod is threadedly connected to the first end plate; one end of the first spring is fixedly connected to the first slide column, and the other end of the first spring is fixedly connected to the sliding plate, and an annular groove communicating with the slow-flow air duct is provided on the cylindrical surface of the first slide column.

2. The obstetric vacuum delivery device according to claim 1, characterized in that: The first end of the cross channel is set as an L-shaped channel, the first end of the L-shaped channel is vertically arranged and connected to the first cavity, the second end of the L-shaped channel is coaxially arranged and connected to the cross channel, and the inner diameter of the L-shaped channel is smaller than the inner diameter of the cross channel.

3. The obstetric vacuum delivery device according to claim 1, characterized in that: A second flow channel and an air inlet are provided in the second end plate to connect the second cavity with the external space of the cylinder. A one-way valve is provided on the air inlet to only allow gas to flow from the second cavity to the external space of the cylinder. The second control component is provided in the second flow channel to control the flow rate of gas entering the second cavity through the second flow channel.

4. The obstetric vacuum delivery device according to claim 3, characterized in that: The second flow channel includes a receiving cavity, an exhaust channel connecting the receiving cavity with the second cavity, and a second air inlet channel connecting the receiving cavity with the external space of the cylinder body, and an end of the second air inlet channel close to the receiving cavity is configured as a tapered hole that diffuses toward the receiving cavity; The second control assembly includes a cylinder formed in the accommodating cavity, a buffer provided in the cylinder, a second slide column coaxially arranged with the second air intake duct, and a cover body provided outside the second end plate for opening / closing the second air intake duct. The upper end of the cylinder is open, the first end of the second slide column is configured as a cone that cooperates with the tapered hole on the second air intake duct, the second end of the second slide column is located in the cylinder, and the buffer component is provided below the second slide column and contacts the second slide column.

5. The obstetric vacuum delivery device according to claim 4, characterized in that: The buffer component includes a hollow elastic ball, and the inner cavity of the elastic ball is filled with non-Newtonian fluid.

6. The obstetric vacuum delivery device according to claim 5, characterized in that: A second spring coaxial with the second slide post is provided in the elastic ball. Under the elastic force of the second spring, the elastic ball contacts the second slide post and causes the conical body at the first end of the second slide post to fit into the conical hole on the second intake passage.

Images