CN111419361B

CN111419361B - Obstetrical membrane rupture device

Info

Publication number: CN111419361B
Application number: CN202010272109.6A
Authority: CN
Inventors: 谢蓓; 腾建菊; 蒋富烈
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2021-03-02
Anticipated expiration: 2040-04-09
Also published as: CN111419361A

Abstract

The invention relates to an obstetrical membrane rupture device which is characterized by at least comprising an outer cylinder (1), at least one membrane rupture needle (4) arranged on the wall of the outer cylinder (1) and a fixed membrane assembly (5) fixed with a push rod (3) in a spiral rotating mode through a penetrating piston (32), wherein the piston (32) moves to enable a fetal membrane to enter the inner cylinder based on the action of negative pressure, and the fixed membrane assembly (5) is in contact with the fetal membrane in the rotating process, so that part of the fetal membrane rotates along with the fixed membrane assembly and is in contact with the membrane rupture needle (4) to rupture. The invention can realize the rupture of the fetal membrane only by small negative pressure and shallow fetal membrane suction depth, is convenient and quick and saves the strength of medical personnel.

Description

Obstetrical membrane rupture device

Technical Field

The invention relates to the technical field of gynecological medical instruments, in particular to a membrane rupturing device for obstetrical department.

Background

The artificial rupture of membranes is one of the common medical intervention means for promoting the labor in obstetrics and gynecology department, no special instrument exists in the process of artificial rupture of membranes in obstetrics and gynecology department clinic, and the obstetrician usually uses a needle or a vascular forceps to carry out artificial rupture of membranes. At present, current rupture of membranes device, can cooperate the gynaecology operation to use, but in the in-service use, present rupture of membranes instrument is that the pjncture needle is leading, it is very inconvenient when operating with pjncture needle doctor, the skilled requirement of technique to the doctor is higher, and the degree of depth is difficult to master when puncturing the fetal membrane, it can harm the foetus to pierce the degree of depth too deeply, and the pjncture needle causes the damage to the vagina when passing through the vagina easily, it is unsafe, the operation degree of difficulty is great, secondly after the rupture of membranes of puncturing is accomplished, be unfavorable for collecting the waste liquid that produces, easily cause the danger of secondary infection, these all are the problems that actual existence and urgent need.

Chinese patent CN 107115139B provides a safe high-efficient gynaecology and obstetrics rupture of membranes device, including the urceolus, still including adjusting the seat, adjust the seat and include interior barrel, interior adjusting collar and regulating plate, be equipped with ventilative passageway in the urceolus, be equipped with the bleeder vent on the interior barrel mantle wall, still include the push rod that stretches into in the urceolus from the urceolus rear end, the push rod front end is fixed with the piston with the sealed activity laminating of interior barrel inner wall, be equipped with dress pinhole on the interior barrel front end mantle wall, the dress pinhole one end that interior barrel outer wall corresponds deepens and is equipped with dress needle groove, still include the rear end and be fixed with the magnetism dog, the front end has the rupture of membranes needle of needle point, the urceolus inner wall. The membrane breaking device is safe to use and high in operation efficiency. However, the membrane rupturing device still has a plurality of disadvantages: firstly, the fetal membrane is sucked by negative pressure, the fetal membrane is required to be adsorbed to the deep part in the cylinder and can be punctured by the fetal membrane needle, and the medical staff needs great strength; secondly, the fetal membrane needle is arranged at the side end of the needle cylinder, the fetal membrane can not be touched to the fetal membrane needle and is broken after being sucked, namely, the probability that the fetal membrane needle breaks the fetal membrane is not one hundred percent, and medical staff has the condition of membrane breaking failure and needs to break the fetal membrane repeatedly.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an obstetrical membrane breaking device which is characterized by at least comprising an outer cylinder, at least one membrane breaking needle arranged on the wall part of the outer cylinder and a fixed membrane component fixed in a spiral rotating mode through a penetrating piston and a push rod, wherein the piston moves to enable a fetal membrane to enter the inner cylinder based on the action of negative pressure, and the fixed membrane component is contacted with the fetal membrane in the rotating process, so that part of the fetal membrane rotates along with the fixed membrane component and is contacted and broken with the membrane breaking needle.

Preferably, the membrane fixing ball and the at least two membrane breaking needles are equidistant, so that the membrane fixing ball and the two membrane breaking needles form an isosceles triangle.

Preferably, the membrane fixing assembly is arranged in a manner of deviating from the axis of the outer cylinder, and the membrane fixing ball and the two membrane breaking needles form an isosceles triangle.

Preferably, at least two membrane breaking needles in the outer cylinder are arranged in a non-opposite circle center symmetrical mode, and the membrane fixing ball and the two membrane breaking needles form an isosceles triangle at equal distance.

Preferably, the membrane fixing assembly comprises a membrane fixing ball with a plurality of bulges arranged on the surface and a ball seat which is rotatably connected with the membrane fixing ball,

under the condition that the push rod drives the piston to move so that negative pressure is formed in the outer cylinder, the plurality of protrusions on the surface of the membrane fixing ball move the fetal membrane in contact with the protrusions on the surface of the membrane fixing ball based on the rotation trend of the membrane fixing ball, so that part of the fetal membrane moves, is in contact with the fetal membrane needles and is broken.

Preferably, the front end of the outer cylinder is provided with a film inlet with a horn structure, wherein,

the film inlet position of the film inlet is opposite to the position of the film fixing ball, so that the direction of the fetal film entering the outer cylinder under the action of negative pressure extends towards the film fixing ball.

Preferably, the ball seat is rotatably fixed with the film fixing ball in a manner of covering a part of the film fixing ball, wherein a rotation direction of the film fixing ball is different from a rotation direction of the ball seat.

Preferably, the ball seat wraps the fixed membrane ball in a manner that the fixed membrane ball can be in direct contact with a fetal membrane of the membrane inlet, wherein the ball seat is arranged between the fixed membrane ball and the piston.

Preferably, the edge of the ball seat adjacent to the fixing ball is a blade capable of breaking the tire membrane, and the blade breaks the tire membrane in contact with the edge of the ball seat when the fixing ball moves the tire membrane in a rotating manner to contact with the edge of the ball seat.

Preferably, the surface of the membrane fixing ball is provided with a plurality of occlusion edges capable of hooking the fetal membrane tissue based on the rotation tendency of the membrane fixing ball under the condition of contacting with the fetal membrane, and the occlusion edges are protrusions which extend along the radial direction of the membrane fixing ball and have a multi-surface structure.

The invention also provides an obstetrical membrane breaking device which at least comprises an outer cylinder, at least one membrane breaking needle arranged on the wall part of the outer cylinder and a fixed membrane assembly fixed in a spiral rotating mode through a penetrating piston and a push rod, wherein the fixed membrane assembly comprises a fixed membrane ball with a plurality of occlusion edges on the surface and a ball seat connected with the fixed membrane ball in a rotatable mode, and under the condition that the push rod drives the piston to move so as to form negative pressure in the outer cylinder, the occlusion edges on the surface of the fixed membrane ball move a fetal membrane contacted with the fixed membrane ball based on the rotating trend of the fixed membrane ball, so that part of the fetal membrane moves, is contacted with the fetal membrane needle and is broken.

Preferably, during the movement of the push rod, the ball seat fixed to the push rod in a spirally rotatable manner rotates in a first direction based on the movement of the push rod, and the fixing ball fixed to the ball seat in an axially rotatable manner generates a movement tendency to rotate in a second direction under the combined action of the force of the ball seat and the frictional force of the tire membrane contacting the surface of the fixing ball, and enlarges the contact area with the tire membrane during the movement.

Preferably, the membrane fixing assembly is arranged in a manner of deviating from the axis of the outer cylinder, wherein the distance between the membrane fixing ball and at least two membrane breaking needles is equal, so that the membrane fixing ball and the two membrane breaking needles form an isosceles triangle.

Preferably, the ball seat is rotatably fixed to the fixing ball so as to cover a part of the fixing ball, wherein an edge of the ball seat adjacent to the fixing ball is a blade capable of rupturing the tire membrane, and the blade ruptures the tire membrane in contact therewith when the fixing ball rotationally moves the tire membrane into contact with the edge of the ball seat.

Preferably, the ball seat is fixed to the push rod in a spirally rotatable manner through a first bracket, wherein the first bracket is provided with a fixing ring for fixing the ball seat in an axial direction, and the fixing ring on the first bracket is fixed to the inner cylinder of the outer cylinder based on at least one second bracket in a manner of allowing the first bracket to rotate, so as to limit the position of the ball seat in the radial direction of the outer cylinder.

Preferably, at least one membrane breaking needle of the outer barrel is arranged in a needle installing hole of the inner barrel, when the push rod drives the rotating part to rotate through the clamping plate, the inner barrel connected with the rotating part through the connecting part rotates along with the rotating part to the needle installing hole to be overlapped with a needle hiding groove of the barrel wall of the outer barrel, and the membrane breaking needle moves into the needle hiding groove under the action of magnetic attraction of the magnetic blocks in the needle hiding groove.

Preferably, the fixed membrane module is provided with a length of the first support in an axial direction of the outer cylinder so as to contact the tire membrane before the membrane rupture needle.

The invention has the beneficial technical effects that:

the membrane rupturing device in the prior art has a plurality of adverse factors: firstly, the structure similar to a syringe is used for pumping negative pressure to suck the fetal membranes, and meanwhile, a membrane breaking needle is arranged on the wall of the syringe. Since the fetal membrane is sucked in an arc shape, the fetal membrane needs to be sucked in a sufficient depth to form a shape capable of contacting with the cylinder wall in order to contact with the membrane breaking needle of the cylinder wall. At this time, the medical staff needs great strength to suck the fetal membranes. In the process, the fetal membranes can not be touched with the fetal membrane needles to be broken after being sucked, namely the probability that the fetal membrane needles break the fetal membranes is not one hundred percent, and medical staff have membrane breaking failure and need to break the fetal membranes repeatedly. The prior art is undoubtedly inconvenient and the membrane rupture rate is not high.

The invention improves the defects of the prior art and solves the technical defects of the prior art. Specifically, the invention arranges a membrane fixing ball capable of capturing the fetal membranes in the outer cylinder, so that the captured fetal membranes move to the membrane breaking needle to break the fetal membranes. The invention can realize the rupture of the fetal membrane only by small negative pressure and shallow fetal membrane suction depth, is convenient and quick and saves the strength of medical personnel. Moreover, the membrane can be broken successfully every time through the combination of the membrane fixing ball and the membrane breaking needle, and medical staff do not need to break the membrane repeatedly. The membrane inlet is arranged close to the membrane fixing ball through the membrane inlet with the horn structure, so that the fetal membrane is captured by the membrane fixing ball quickly after being sucked and moves to the membrane breaking needle to break, the membrane breaking success rate is further ensured, and the operation flow of medical staff is simplified.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of one of the preferred configurations of the present invention;

FIG. 3 is a schematic diagram of one of the preferred configurations of the present invention;

FIG. 4 is a first preferred embodiment of the membrane-defining ball and membrane-rupturing needle of the present invention;

FIG. 5 is a second preferred embodiment of the membrane-defining ball and membrane-rupturing needle of the present invention;

FIG. 6 is a third preferred embodiment of the membrane-defining ball and membrane-rupturing needle of the present invention;

FIG. 7 is an enlarged schematic view of the rupture pin configuration;

FIG. 8 is an axial structural view of the outer cylinder; and

fig. 9 is a structural schematic diagram of the relative structure of the inner cylinder and the outer cylinder.

List of reference numerals

1: an outer cylinder; 2: an inner barrel; 3; a push rod; 4: a membrane rupturing needle; 5: fixing a membrane assembly; 11: a chute; 12: a first groove; 13; a second groove; 14; a third groove; 15; a ventilation channel; 16: needle hiding grooves; 17: a magnetic block; 21: an inner cylinder; 22: a slider; 23: air holes are formed; 24: mounting a pinhole; 25: needle installing grooves; 26: a rotating part; 27: a card slot; 28: a connecting portion; 29: a liquid flowing groove; 31: clamping a plate; 32: a piston; 33: a push handle; 34: a film inlet; 41: a stopper; 51: fixing a membrane ball; 52: a ball seat; 53: a first bracket; 54: a fixing ring; 55: a second support.

Detailed Description

The following detailed description is made with reference to fig. 1 to 9 of the drawings.

The fetal membrane of the present invention may be referred to as a membrane or an amniotic membrane. The invention is not only suitable for use in the rupture of membranes, but also for use in the rupture of membrane-like tissues of human or animal tissues. The invention can also be a membrane rupturing device for animal fetal membranes.

A rupture pin, a pin-type member adapted to rupture a fetal membrane, has a sharp end capable of rupturing a fetal membrane. Preferably, the membrane breaking needle can be a common needle or a needle with a plurality of edges. The length of the blade is arranged in parallel with the axial direction of the needle. The direction of the blade is radial to the needle.

The invention provides a membrane rupturing device for obstetrical department, which at least comprises an outer cylinder 1, at least one membrane rupturing needle 4 arranged on the wall part of the outer cylinder 1 and a fixed membrane component 5 fixed in a spiral rotating mode through a penetrating piston 32 and a push rod 3, as shown in figures 1 to 3.

Preferably, the membrane fixing assembly 5 is a structure for assisting the membrane breaking needle in breaking the fetal membrane. The fixing membrane assembly 5 is used for fixing the fetal membrane on the surface of the fixing membrane ball under the condition of contacting the fetal membrane and cannot move greatly. And the membrane fixing component enables the fetal membrane to move close to the position of the membrane breaking needle along with the rotation of the membrane fixing ball.

Wherein, an inner cylinder 2 is arranged in the outer cylinder 1. The inner cylinder 2 and the outer cylinder 1 are axially fixed relative to each other and radially rotate relative to each other. The inner cylinder 2 includes a rotation portion 26, a connection portion 28, and an inner cylinder 21. Preferably, the rotation portion 26, the connection portion 28 and the inner cylinder 21 can be integrally designed, which is more favorable for the inner cylinder 2 to rotate relative to the outer cylinder 1. Preferably, the rotating portion 26, the connecting portion 28 and the inner cylinder 21 surround to form an annular fluid groove 29 with a notch facing the front end of the outer cylinder 1.

The piston 32 is movably and sealingly arranged with the inner cylinder 21. The plunger 3 connected to the piston 32 is engaged with the rotary part 26 via the catch plate 31, and the plunger 3 can drive the inner tube 2 to rotate together with the plunger 3.

The fixed diaphragm assembly 5 extends through the piston 32 via the first bracket 53 and is fixed in the push rod 3 in a spirally rotatable manner. Preferably, the fixed diaphragm assembly 5 is provided with a length of the first bracket 53 in such a manner as to contact the fetal membrane earlier than the rupturing needle in the axial direction of the outer cylinder, so as to facilitate capturing of the fetal membrane.

Preferably, the fixed membrane component can rotate in the process that the push rod 3 moves towards the outside of the inner cylinder or moves towards the inside of the inner cylinder. Preferably, the hole of the first support 53, which is in contact with the piston 32, is provided with a sealing ring, so that the sealing effect is still provided during the movement of the first support 53 by the piston.

The fixing film assembly 5 of the present invention includes a fixing film ball 51 having a plurality of engaging ribs on a surface thereof and a ball seat 52 rotatably connected to the fixing film ball 51. The ball seat 52 is rotatably fixed to the fixing ball 51 so as to cover a part of the fixing ball 51. The ball seat 52 is fixed to the push rod 3 by the first bracket 53 and the ball seat 52 and the first bracket 53 to be spirally rotatable. Preferably, the first support 53 is a straight rod. The first bracket 53 is provided with a fixing ring 54 for fixing the ball seat 52 in an axial direction, and the fixing ring 54 fitted over the first bracket 53 in a manner allowing the first bracket 53 to rotate is fixed to the inner cylinder 21 of the outer cylinder 1 based on at least one second bracket 55, thereby defining a position of the ball seat 52 in a radial direction of the outer cylinder 1. Preferably, the fixing ring is arranged, so that the first support 53 and the push rod 3 are arranged together in a spiral rotating manner, when the push rod moves, the fixed membrane assembly moves under the influence of force generated in the moving process of the push rod, and the fixing ring 53 can effectively limit the axial displacement of the fixed membrane assembly, so that the fixed membrane assembly can only rotate without axial displacement, and the membrane breaking process is prevented from being influenced.

Preferably, the membrane fixing ball 51 is a ball for hanging the membrane while contacting the membrane. Preferably, the membrane fixing ball can be a circular ball or an oval ball. Preferably, the surface of the membrane fixing ball is not smooth, but is provided with a plurality of bulges for hanging the membrane. Preferably, the protrusions are prismatic protrusions. Preferably, the protrusions project in the radial direction of the ball, thereby forming a "spiky ball" like structure.

Preferably, the surface of the fixing film ball 51 is provided with a plurality of engagement ridges capable of hooking the fetal membrane tissue based on the rotation tendency of the fixing film ball 51 in the case of contacting the fetal membrane. The occlusion edges are projections with a multi-surface structure extending along the radial direction of the film fixing ball. Preferably, one end of the biting edge is a sharp end that is not capable of puncturing the fetal membrane. The provision of the plurality of biting ridges has an advantage in that, in the case where the film fixing balls 51 are in contact with the tire film, the biting ridges in different directions are simultaneously in contact with the film and give the film forces in different directions, so that the film cannot slide. Preferably, the film is flexible and deformable, and the space between the occlusion edges is filled with the film to form a negative pressure, so that the film and the occlusion edges are further stabilized and cannot be separated, and the surface of the film fixing ball 51 can smoothly capture the fetal film. As the fixing ball 51 rotates, the area of the fetal membrane attached to the fixing ball 51 increases. In the case where the ball seat 52 rotates, the film is deformed and moved by being pulled by the film fixing ball 51, thereby contacting the film breaking needle.

Preferably, in the case that the push rod 3 drives the piston 32 to move so as to form negative pressure in the outer cylinder 1, the plurality of biting edges on the surface of the film fixing ball 51 move the tire film contacted with the film fixing ball 51 based on the rotation tendency of the film fixing ball 51 so as to make part of the tire film move and contact with the tire film needle 4 and break. The advantage of providing a membrane-fixing ball is that the membrane-fixing ball 51 is located in the vicinity of the membrane-breaking needle, and the membrane-fixing ball 51 is located at a shorter distance from the membrane-inlet 34 than the membrane-breaking needle. The fetal membrane just enters the membrane inlet 34 of the outer cylinder to touch the membrane fixing ball 51 and be captured, namely, the fetal membrane can be captured without entering the outer cylinder for a deep distance, and the probability of touching the membrane breaking needle under the movement of the membrane fixing ball is increased.

Preferably, the ball seat 52 fixed to the push rod 3 in a spirally rotatable manner is rotated in the first direction based on the movement of the push rod 3 during the movement of the push rod 3. For example, the ball seat 52 rotates around the axis of the first support as a first direction of rotation. The fixing ball 51 performs a third direction rotation along the axis of the ball seat 51 to which it is fixed. In this process, the fixing ball 51 is rotated in the first direction and rotated in the third direction to generate a moving tendency to rotate in the second direction by the combined action of the force of the ball seat 52 on the fixing ball 51 and the frictional force of the tire film in contact with the surface of the fixing ball 51. The contact area with the fetal membrane is enlarged during the movement of the membrane fixing ball 51. The advantage of this arrangement is that the non-directional movement of the membrane fixing ball 51 captures more of the membrane and pulls the membrane to deform and promotes the membrane to touch the membrane breaking needle, thereby increasing the probability of the membrane touching the membrane breaking needle.

Preferably, the ball seat 52 is a hemispherical structure that is adapted to the fixing ball 52. The circular cross-section formed by the edges of ball seat 52 forms an angle a of less than 90 degrees with first leg 53. Preferably, the α setting may be 60 degrees or 45 degrees. The advantage of the angling is that more of the surface of the balloon 52 can be turned towards the rupture pin, thereby turning more of the fetal membrane towards the rupture pin.

Preferably, the edge of the ball seat 52 is a blunt edge that cannot rupture the fetal membrane, and only the membrane rupturing needle can rupture the fetal membrane. The rupture port of the membrane breaking needle is small, so that the large-area fetal membrane can be prevented from being lost in the outer cylinder.

Preferably, the edge of the ball seat 52 adjacent to the fixing ball 51 is a blade capable of breaking the tire membrane. In the case where the fixing ball 51 moves the tire film in a rotating manner to be in contact with the edge of the ball seat 52, the blade breaks the tire film in contact therewith. The edge of the ball seat 52 is an edge, so that the fetal membrane on the surface of the membrane fixing ball 51 can be broken by the edge in the process that the membrane fixing ball 51 touches the membrane breaking needle, the probability of rupture of the fetal membrane is increased, and one hundred percent membrane breaking is realized. The film on the surface of the film fixing ball 51 may be broken by the film breaking needle along the edge of the ball seat 52 or at the same time in a captured state, and the block-shaped fetal membrane may be left in the outer cylinder. In the actual use process, because the size of the film fixing ball 51 is smaller than the diameter of the outer cylinder, the formed fetal membrane blocks and amniotic fluid are simultaneously stored in the outer cylinder.

If the fixed membrane component 5 is arranged on the central axis of the outer cylinder 1, the two membrane breaking needles are symmetrically arranged by taking the central axis as the center. At this time, although the tire membrane can be broken, since the fixed membrane module 5 just abuts against the tire membrane at the central axis, the deformation of the tire membrane in the tire membrane cylinder is small, and there is a certain probability of failure of the breakage.

Preferably, as shown in fig. 4, the fixed diaphragm assembly 5 is disposed to be offset from the central axis of the outer cylinder 1. The distance between the film fixing ball 51 and at least two film breaking needles is equal, so that the film fixing ball 51 and the two film breaking needles form an isosceles triangle. The advantage of the eccentric arrangement of the fixed membrane component 5 is that the depth of the fetal membrane entering the fetal membrane cylinder is not affected, and the fetal membrane is captured and pulled at the eccentric position, so that the fetal membrane has large deformation, and the membrane breaking needle is more easily touched to break.

Preferably, as shown in fig. 5, in the case where two membrane rupturing needles are provided, the membrane fixing assembly 5 is adjacent to one of the membrane rupturing needles 4. The rupture needle 4 is located at a lower position of the rotation tendency of the ball seat 52. The inclined surface of the ball seat 52 is parallel to the line between the two rupture pins. The membrane fixing component is arranged in such a way, so that after the membrane fixing ball 51 catches the membrane, the membrane can be moved to a membrane breaking needle which is close to the membrane fixing ball in a short time to break, and the membrane breaking efficiency is improved

Preferably, as shown in fig. 6, at least two membrane rupturing needles 4 in the outer cylinder 1 are arranged in a non-symmetrical manner with respect to the center of the circle, and the membrane fixing ball 51 and the two membrane rupturing needles 4 form an isosceles triangle at equal distances. The ball seat 52 is parallel to the line between the two rupture pins along the circular cross section, i.e. the inclined plane. The advantage that the membrane fixing component is arranged in this way is that the distance between the membrane fixing ball 51 and at least two membrane breaking needles is shortened, so that the membrane fixing ball 51 can rapidly move the fetal membrane to the membrane breaking needles, and the fetal membrane can touch the membrane breaking needles no matter which membrane breaking needle moves. Therefore, the membrane breaking time is shortened, and the membrane breaking probability is improved.

Preferably, as shown in fig. 2 and 3, the film inlet 34 of the outer tube 1 has a trumpet structure. Wherein, the membrane inlet is made of soft medical materials, such as medical silica gel. The contact area of the outer cylinder and the fetal membrane can be enlarged by the horn structure, so that the adsorption of the fetal membrane is facilitated. As shown in fig. 2, the larger end of the film inlet 34 contacts the fetal film, and the smaller end faces the fixed film assembly 5. Preferably, the film inlet 34 is located opposite to the fixing ball 51, so that the direction of the fetal membrane entering the outer cylinder under the action of negative pressure extends towards the fixing ball 51. In the case where the fixed diaphragm assembly 5 is disposed on the central axis of the outer cylinder, the smaller end of the diaphragm inlet 34 of the horn structure is located at the central position, and the diameter thereof is equal to or smaller than the diameter of the outer cylinder 1.

As shown in fig. 3, the first support 53 is not a straight rod, and may be provided in any curved shape as needed. The fixed membrane assembly 5 is arranged at a position other than the central axis and is respectively close to the membrane breaking needles 4 at different positions along with the rotation of the first bracket 53. The smaller end of the membrane inlet 34 of the horn structure is adaptively arranged at the opposite position of the membrane fixing ball 51. Preferably, the film inlet 34 is connected with the first bracket 53 through a mechanical structure (not shown in the figure), and when the first bracket 53 rotates, the film inlet 34 rotates synchronously with the first bracket, so that the smaller end of the film inlet 34 is always in a constant position relative to the film fixing ball 51. Preferably, the membrane inlet 34 is connected with the first bracket 53 at a fixed angle through a flexible bracket and an annular cavity penetrating through the wall of the outer cylinder 1, so that the membrane inlet 34 and the membrane fixing ball 51 move synchronously. The advantage of the synchronous movement of the film inlet 34 and the film fixing ball 51 is that the film entering the outer cylinder can be captured by the film fixing ball 51 and moved to the vicinity of the film breaking needle to be broken or broken by the edge of the ball seat 52, so as to avoid the negative effect that the film is separated from the film fixing ball 51 due to pulling caused by the dislocation of the film fixing ball 51 and the smaller end of the film inlet 34 in the rotation process, and avoid the excessive distortion of the film.

Fig. 7 shows the structure of the rupture pin 4 in detail. As shown in fig. 7, at least one membrane rupturing needle 4 of the outer cylinder 1 is disposed in the needle mounting hole 24 of the inner cylinder 21. The needle point of the rupture needle 4 is arranged towards the axis of the outer cylinder 1, and the rupture needle 4 is arranged along the radial direction of the outer cylinder 1. When the push rod 3 drives the rotating part 26 to rotate through the catch plate 31, the inner cylinder 21 connected with the rotating part 26 through the connecting part 28 is overlapped with the needle storage groove 16 on the cylinder wall of the outer cylinder along with the rotation of the rotating part 26 until the needle mounting hole 24, and the membrane rupture needle 4 moves into the needle storage groove 16 under the action of the magnetic attraction force of the magnetic blocks 17 in the needle storage groove 16.

Preferably, fig. 8 and 9 show a schematic structural diagram of how the outer cylinder 1 and the inner cylinder 2 can rotate. The pusher 3 is connected to the rotatable portion 26 by a catch plate 31. Wherein, the push rod 3 includes a plurality of cardboard 31 of following 1 circumference distribution of urceolus, and cardboard 31 length direction and width direction set up along 1 axial of urceolus and radial respectively. The inner wall of the rotating part 26 is provided with a plurality of slotted clamping grooves 27 with the length direction parallel to the axis of the outer cylinder 1. The outer edges of the plurality of clamping plates 31 are sequentially clamped on the clamping grooves 27 in a sliding mode, so that under the condition that the push rod 3 rotates clockwise around the axis of the outer barrel 1, the push rod 3 is matched with the clamping plates 31 through the clamping grooves 27 to drive the inner barrel 2 to rotate.

Preferably, the inner wall of the outer cylinder 1 is provided with an arc-shaped chute 11 arranged along the circumferential direction of the outer cylinder 1. The groove bottom of the sliding groove 11 is respectively provided with a concave point-shaped groove I12, a groove II 13 and a groove III 14. The first groove 12 and the third groove 14 are respectively positioned at two ends of the sliding chute 11. The outer wall of the inner cylinder 21 is provided with a slide block 22 which is slidably embedded on the chute 11. The outer cylinder 1 is internally provided with a ventilation channel 15, and the ventilation channel 15 is positioned between the inner cylinder 21 and the outer cylinder 1. The sleeve wall of the inner cylinder body 21 is provided with an air hole 23. When the end part of the sliding block 22 is embedded in the first groove 12, the air hole 23 is staggered with the rear end of the air channel 15. When the push rod 3 rotates until the needle installing hole 24 is aligned with the needle hiding groove 16 and the magnetic block 17 magnetically adsorbs the stopper 41 to enable the whole membrane breaking needle 4 to enter the needle hiding groove 16, the sliding block 22 slides from the first groove 12 to the second groove 13 along the sliding groove 11. The push rod 3 continues to rotate clockwise around the axis of the outer cylinder 1, so that the slide block 22 slides from the second groove 13 to the third groove 14 along the sliding groove 11, and at the moment, the air holes 23 are communicated with the rear end of the air vent channel 15.

Preferably, the small amplitude range of the axial movement of the fixed diaphragm assembly 5 during the rotation of the push rod 3 does not affect the diaphragm rupture range.

The use method of the membrane rupturing device comprises the following steps:

before membrane rupture, the push rod 3 is rotated anticlockwise to be in place, the end part of the slide block 22 slides into the first groove 12, and the air holes 23 are staggered with the rear end of the air passage 15. The push rod 3 is pushed to make the piston 32 move to the front end of the inner cylinder 21, and the fixed membrane component rotates along with the push rod 3 in the process.

When the membrane is broken, the membrane inlet of the horn structure at the front end of the outer cylinder 1 is pressed against the fetal membrane, the push rod 3 is pulled out, and negative pressure is formed in the inner cylinder 2. Under the action of negative pressure, the absorbing part of the fetal membrane enters the membrane inlet and goes deep, and the absorbing part of the fetal membrane gets deeper and deeper along with the part of the fetal membrane entering the inner cylinder. Because the film fixing ball is arranged at an eccentric position, the film fixing ball cannot be jacked back to block the continuous entering when the film covering enters. The detent ball 52 is rotated by the ball seat 52 to bring the tire membrane into contact with the detent ball surface. The occlusion edges in different directions on the surface of the fixed film ball hook the fetal membrane, and the fetal membrane can not move randomly relative to the surface of the fixed film ball and is similarly fixed. The film fixing ball rotates under the action of the ball seat 52 and the pulling friction force of the fetal film, and moves the part of the fetal film and touches the needle point at the front end of the film breaking needle 4, so that the fetal film is broken; thus completing the membrane rupture operation. Preferably, if the edge of the ball seat 52 is provided as a blade, the part of the fetal membrane that is in rotational contact with the blade is also broken into a plurality of cracks for assisting the rupture of the fetal membrane, increasing the probability of rupture of the fetal membrane and reducing the difficulty of rupture of the fetal membrane.

Preferably, the invention also provides a membrane rupturing assembly without a membrane rupturing needle, namely a membrane fixing assembly is arranged in the membrane rupturing barrel. Preferably, the edge of the ball seat 52 is provided as a blade.

After the membrane is broken, the push rod 3 is rotated clockwise around the axis of the outer barrel 1, the inner barrel 2 is driven to rotate through the matching of the clamping groove 27 and the clamping plate 31, the sliding block 22 slides into the second groove 13 from the first groove 12 along the sliding groove 11, the needle installing hole 24 is aligned with the needle hiding groove 16, and the magnetic block 17 magnetically adsorbs the stop block 41, so that the membrane breaking needle 4 integrally enters the needle hiding groove 16, and the needle retracting operation is completed. At this time, the fixed diaphragm assembly 5 rotates clockwise with the push rod 3.

The push rod 3 is continuously pulled out to suck the amniotic fluid into the outer barrel, and the negative pressure effect on the fetal membranes is reduced at the moment. The fixing ball 52 continues to rotate to break the fetal membrane caught on the surface of the fixing ball 52 into a block shape by the edge of the ball seat 52, and the fetal membrane is separated from the fetal membrane body. Alternatively, in the case where the edge of ball seat 52 is blunt, the fetal membrane retracts away from the surface of the membrane ball 52. For the fetal membrane which is not partially separated from the surface of the membrane fixing ball 52, the fetal membrane is separated from the fetal membrane body in the process of repeatedly rotating and moving the membrane fixing ball 52 to form a block shape and is stored together with the amniotic fluid.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. The obstetrical membrane rupture device is characterized by at least comprising an outer cylinder (1), at least one membrane rupture needle (4) arranged on the wall of the outer cylinder (1), an inner cylinder (2), a piston (32) and a push rod (3),

wherein, an inner cylinder (2) is arranged in the outer cylinder (1), the inner cylinder (2) and the outer cylinder (1) are relatively fixed in the axial direction and relatively rotate in the radial direction, the inner cylinder (2) comprises a rotating part (26), a connecting part (28) and an inner cylinder body (21),

the piston (32) and the inner cylinder body (21) are movably arranged in a sealing way, the push rod (3) connected with the piston (32) is clamped with the rotating part (26) through a clamping plate (31), so that the push rod (3) can drive the inner cylinder (2) to rotate along with the push rod (3),

the membrane rupturing device also comprises a fixed membrane component (5) which is fixed with the push rod (3) in a spiral rotating mode through a penetrating piston (32), the fixed membrane component comprises a fixed membrane ball (51) the surface of which is provided with a plurality of bulges and a ball seat (52) which is connected with the fixed membrane ball (51) in a rotating mode,

wherein, the piston (32) moves to enable the fetal membrane to enter the inner cylinder based on the action of negative pressure, the fixed membrane component (5) is contacted with the fetal membrane in the rotating process, thereby enabling part of the fetal membrane to rotate along with the fixed membrane component and contact and break with the membrane breaking needle (4),

under the condition that the push rod (3) drives the piston (32) to move so that negative pressure is formed in the outer cylinder (1), the protrusions on the surface of the membrane fixing ball (51) move the membrane in contact with the protrusions on the surface of the membrane fixing ball (51) based on the rotation trend of the membrane fixing ball (51) so that part of the membrane moves and is in contact with and breaks the membrane breaking needles (4), the distance between the membrane fixing ball (51) and at least two membrane breaking needles is equal, the membrane fixing ball (51) and the two membrane breaking needles form an isosceles triangle, the membrane fixing assembly (5) is arranged in a mode of deviating from the axis of the outer cylinder (1), and the membrane fixing ball (51) and the two membrane breaking needles form an isosceles triangle.

2. Obstetric membrane rupturing device according to claim 1, wherein the front end of the outer cartridge (1) is provided with a membrane inlet (34) of a trumpet structure, wherein,

the film inlet position of the film inlet (34) is opposite to the position of the film fixing ball (51), so that the direction of the fetal film entering the outer cylinder under the action of negative pressure extends towards the film fixing ball (51).

3. Obstetric film breaking device according to claim 2, wherein said ball seat (52) is rotatably fixed with said film fixing ball (51) in such a way as to cover part of said film fixing ball (51), wherein,

the rotating direction of the film fixing ball (51) is different from the rotating direction of the ball seat (52).

4. Obstetric membrane rupturing device according to claim 3, wherein the ball seat (52) encloses the membrane fixing ball (51) in such a way that the latter can be brought into direct contact with the fetal membrane of the membrane inlet, wherein the ball seat (52) is arranged between the membrane fixing ball (51) and the piston (32).

5. Obstetric membrane breaking device according to claim 4, characterized in that the edge of said ball seat (52) is a blade capable of rupturing a fetal membrane, which blade is close to said membrane-defining ball (51),

in case the fixing ball (51) moves the membrane in a rotating manner into contact with the edge of the ball seat (52), the blade breaks the membrane in contact therewith.

6. Obstetric film breaking device according to claim 5, characterized in that the surface of said film fixing ball (51) is provided with a plurality of snap ridges capable of hooking the fetal membrane tissue based on the rotation tendency of said film fixing ball (51) under the condition of contacting the fetal membrane,

the occlusion edges are projections extending along the radial direction of the film fixing ball and having a multi-surface structure.