Amniocentesis positioning device used in antenatal diagnosis center

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to an amniotic fluid puncture positioning device used in an antenatal diagnosis center, which comprises a support mechanism, a self-adaptive contour sensing mechanism, a self-adaptive angle adjusting mechanism and a puncture needle inserting guide mechanism, the puncture position is determined; when the self-adaptive angle adjusting mechanism works, the puncture angle is always perpendicular to the uterine amniotic fluid position of a puerpera; the puncture needle inserting guide mechanism has a first state when the puncture needle cannot be inserted due to locking and a second state when the puncture needle is conveniently inserted after locking is released, and when the self-adaptive angle adjusting mechanism works to enable the puncture angle to be perpendicular to the uterus of the puerpera, the puncture needle inserting guide mechanism is automatically driven to be switched from the first state to the second state; the problems that in the positioning process, electronic equipment is excessively relied on, self-adaptive positioning cannot be carried out according to the body posture of a puerpera, and normal operation of a puncture operation is affected are solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an amniocentesis positioning device used in prenatal diagnostic centers. Background Technology

[0002] Amniocentesis is a method of prenatal diagnosis. For the puncture site selection, the pregnant woman lies supine, and a comprehensive routine ultrasound examination of the fetus is performed to observe the location of the placenta, the position of the fetal head, trunk, and limbs, and the distribution of the umbilical cord. The amniotic fluid level is then closely monitored before selecting the puncture point. The principles for puncture point selection are: choose the anterior abdomen, not the lateral abdomen; choose a location with abundant amniotic fluid and close to the body surface; and choose a location free of the placenta, fetal limbs, umbilical cord, and the pregnant woman's blood vessels. Therefore, accurate localization before puncture is crucial.

[0003] Currently, the main methods for locating the amniocentesis puncture site are ultrasound-guided puncture or mechanical positioning assistance. However, ultrasound-guided puncture is expensive and easily affected by electromagnetic interference, making it difficult to operate normally. Mechanical positioning assistance typically involves fixing the puncture point with a stent after it is located, but the mother's breathing during this process can easily cause positioning deviation, leading to needle tract displacement and affecting the puncture procedure. Therefore, locating the amniocentesis puncture site is extremely inconvenient. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Therefore, the purpose of this invention is to provide an amniocentesis positioning device for use in prenatal diagnostic centers, which replaces the traditional method of positioning via amniocentesis. This avoids the problem of over-reliance on electronic devices and the inability to adapt to the mother's body posture during the positioning process, thus affecting the normal progress of the puncture surgery.

[0006] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] An amniocentesis positioning device for use in a prenatal diagnostic center, comprising:

[0008] A support mechanism, comprising a support frame, a flexible telescopic member connected at one end to the support frame, and a connecting frame connected at one end to the support frame;

[0009] An adaptive contour sensing mechanism is installed at the end of the flexible telescopic member away from the support frame. When the adaptive contour sensing mechanism is working, it determines the puncture position by mechanically sensing the contour of the mother's uterus.

[0010] An adaptive angle adjustment mechanism is installed at the end of the connecting frame away from the support frame. When the adaptive hub sensing mechanism senses the puncture position, it automatically triggers the adaptive angle adjustment mechanism to work, so that the puncture angle is always perpendicular to the position of the amniotic fluid in the mother's uterus.

[0011] The puncture needle guide mechanism corresponds to the adaptive contour sensing mechanism. The puncture needle guide mechanism has a first state when it is locked and cannot be inserted, and a second state when it is unlocked and can be inserted easily. When the adaptive angle adjustment mechanism works so that the puncture angle is perpendicular to the uterus of the parturient, the puncture needle guide mechanism is automatically driven to switch from the first state to the second state.

[0012] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the adaptive contour sensing mechanism includes a sensing ring whose top is connected to the bottom of the flexible connector and a plurality of elastic sensing elements evenly distributed at the bottom of the sensing ring.

[0013] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the elastic sensing element includes a sensing head located below the sensing ring and an elastic element with one end connected to the sensing head and the other end connected to the bottom of the sensing ring.

[0014] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the adaptive angle adjustment mechanism includes a base whose top is connected to the bottom of the connecting frame and has a mounting frame on the top, a gravity block freely suspended on the mounting frame, a swing arm that is pulsatorically connected to the puncture needle guide mechanism, and an adaptive adjustment component whose one end is pulsatorically connected to the gravity block and whose other end is pulsatorically connected to the swing arm.

[0015] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the bottom of the gravity block is rotatably connected to a first hinge seat.

[0016] The adaptive adjustment assembly includes a bevel gear set mounted on the top of the base and connected to the swing arm at one end via a rotating shaft, a second hinge seat located at the other end of the bevel gear set, a hinge plate hinged at one end to the second hinge seat, a hinge frame hinged at one end to the first hinge seat and slidably connected to a third hinge seat on its inner side, and a trigger assembly that is drivenly connected at one end to the bevel gear set and at the other end to the adaptive contour sensing mechanism. The end of the hinge plate away from the second hinge seat is hinged to the third hinge seat.

[0017] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the bottom of the sensing ring is provided with a plurality of through holes corresponding to the sensing head, the top of the sensing head is provided with a top rod corresponding to the through holes, the inner side of the sensing ring is provided with an annular shell communicating with the plurality of through holes, the top of the annular shell is provided with a first connection port communicating with the interior of the annular shell, wherein a one-way valve is provided in the connection channel between the plurality of through holes and the annular shell;

[0018] The side wall of the rotating shaft connecting the bevel gear set and the first hinge seat is uniformly provided with multiple sawtooth blocks.

[0019] The triggering component includes a sleeve located at the top of the base and having a second connection port on its side wall, and a limiting block movably installed inside the sleeve and having a gap engagement with the plurality of sawtooth blocks on its side wall. The first connection port is connected to the second connection port via a flexible hose.

[0020] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the puncture needle guide mechanism includes a needle insertion assembly connected to the swing arm and an on / off assembly installed on the sensing ring and corresponding to the needle insertion assembly.

[0021] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the needle insertion assembly includes a threaded guide cylinder whose sidewall is rigidly connected to the swing arm, a spiral puncture cylinder threadedly connected to the threaded guide cylinder, and a rotating component that drives the spiral puncture cylinder to extend and retract within the threaded guide cylinder.

[0022] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the rotating component includes a plurality of connecting rods located on the side wall of the threaded guide cylinder and a knob whose bottom is slidably connected to the other end of the connecting rod and whose side wall has a plurality of handles.

[0023] The sidewall of the threaded guide cylinder has an elastic sound-emitting block corresponding to the handle.

[0024] As a preferred embodiment of the amniocentesis positioning device used in a prenatal diagnostic center according to the present invention, the switching component includes a receiving seat installed on the top of the sensing ring and a gravity ball connected to the receiving seat ball and having a guide tube on the top. The guide tube passes through the receiving seat and is adapted to the spiral puncture cylinder. The bottom side wall of the guide tube has a counterweight chain.

[0025] Compared with existing technologies, the beneficial effects of this invention are that the amniocentesis positioning device used in this prenatal diagnostic center, when operating through the adaptive contour sensing mechanism, mechanically senses the contour of the mother's uterus to determine the puncture position. After determining the puncture position, the adaptive angle adjustment mechanism operates to ensure that the puncture angle is always perpendicular to the position of the mother's uterus, thereby preventing the positioning puncture position from shifting due to the mother's breathing or other movements later on. Furthermore, when the adaptive angle adjustment mechanism operates to ensure that the puncture angle is perpendicular to the mother's uterus, it automatically drives the puncture needle guide mechanism to switch from the first state to the second state, thus facilitating the puncture work for medical staff. This replaces the traditional method of positioning for amniocentesis and avoids the problem of over-reliance on electronic devices and the inability to adaptively position according to the mother's body posture during the positioning process, which affects the normal progress of the puncture surgery. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0027] Figure 1 This is a schematic diagram of the structure of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention;

[0028] Figure 2 This is a structural breakdown diagram of the adaptive contour sensing mechanism, adaptive angle adjustment mechanism, and puncture needle guide mechanism of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention.

[0029] Figure 3 This is a schematic diagram of the adaptive contour sensing mechanism of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention.

[0030] Figure 4 This is a structural exploded view of the adaptive angle adjustment mechanism of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention.

[0031] Figure 5This is a structural exploded view of the needle insertion assembly of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention.

[0032] Figure 6 This is a schematic diagram of the on / off component of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention.

[0033] In the diagram: 100, Support mechanism; 110, Support frame; 120, Flexible connector; 130, Connecting frame; 200, Adaptive contour sensing mechanism; 210, Sensing ring; 210a, Annular housing; 210a-1, First connection port; 220, Elastic sensing element; 220a, Sensing head; 220b, Elastic element; 300, Adaptive angle adjustment mechanism; 310, Base; 310a, Mounting frame; 320, Gravity block; 320a, First hinge seat; 330, Swing arm; 340, Adaptive adjustment assembly; 340a, Bevel gear set; 340a-1, Serrated block; 340b, Second hinge seat; 3 40c, Hinge plate; 340d, Hinge frame; 340d-1, Third hinge seat; 340e, Trigger assembly; 340e-1, Sleeve; 340e-11, Second connection port; 340e-2, Limiting block; 400, Puncture needle guide mechanism; 410, Puncture assembly; 410a, Threaded guide cylinder; 410a-1, Elastic sound-emitting block; 410b, Spiral puncture cylinder; 410c, Rotating component; 410c-1, Connecting rod; 410c-2, Knob; 420, On / off assembly; 420a, Receiver; 420b, Gravity ball; 420b-1, Guide tube; 420b-11, Counterweight chain. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0037] This invention provides an amniocentesis positioning device for use in prenatal diagnostic centers, replacing the traditional method of amniocentesis positioning. It avoids the problem of over-reliance on electronic devices and the inability to adapt to the mother's body posture during the positioning process, which affects the normal progress of the puncture surgery.

[0038] Figures 1-6 The diagram shown is a structural schematic of an amniocentesis positioning device used in a prenatal diagnostic center according to the present invention. Please refer to [link / reference needed]. Figures 1-6 This article provides a detailed introduction to the amniocentesis positioning device used in this type of prenatal diagnostic center.

[0039] Example 1

[0040] refer to Figures 1-6 The present invention discloses an amniocentesis positioning device used in a prenatal diagnostic center, the main body of which includes a support mechanism 100, an adaptive contour sensing mechanism 200, an adaptive angle adjustment mechanism 300, and a puncture needle guide mechanism 400.

[0041] The support mechanism 100 is used to support and install the entire device. The support mechanism 100 includes a support frame 110, a flexible telescopic member connected to the support frame 110 at one end, and a connecting frame 130 connected to the support frame 110 at the other end. The support frame 110 is used to facilitate the installation of the flexible telescopic member and the connecting frame 130. The flexible telescopic member is used to connect the adaptive sensing mechanism and facilitates the movement of the adaptive sensing mechanism on the abdomen of the mother during operation. The connecting frame 130 is used to fix the adaptive angle adjustment mechanism 300.

[0042] The adaptive contour sensing mechanism 200 is used to mechanically sense the contour of the mother's uterus during the puncture procedure, thereby determining the location for amniocentesis. The adaptive contour sensing mechanism 200 is installed at the end of the flexible telescopic member away from the support frame 110. When the adaptive contour sensing mechanism 200 is working, it mechanically senses the contour of the mother's uterus to determine the puncture location. Thus, when the adaptive contour sensing mechanism 200 is working, it determines the position of the mother's uterine contour through mechanical sensing, thereby finding the location for amniocentesis.

[0043] The adaptive angle adjustment mechanism 300 is used to adaptively adjust the puncture angle in real time after the puncture position is found, so that the puncture angle is always perpendicular to the position of the amniocentesis of the mother. The adaptive angle adjustment mechanism 300 is installed at the end of the connecting frame 130 away from the support frame 110. When the adaptive hub sensing mechanism senses the puncture position, it automatically triggers the adaptive angle adjustment mechanism 300 to work, so that the puncture angle is always perpendicular to the position of the amniocentesis of the mother. After the adaptive contour sensing mechanism 200 senses the position of the amniocentesis of the mother, the adaptive angle adjustment mechanism 300 starts to work, so that the puncture angle is always perpendicular to the position of the mother's uterus, thereby preventing the puncture angle from shifting when the mother breathes or makes other micro movements.

[0044] The puncture needle guide mechanism 400 facilitates puncture guidance after the adaptive angle adjustment mechanism 300 adjusts the puncture angle to be perpendicular to the mother's uterus. The puncture needle guide mechanism 400 corresponds to the adaptive contour sensing mechanism 200. The puncture needle guide mechanism 400 has a first state when it is locked and cannot be inserted, and a second state when it is unlocked and can be inserted. When the adaptive angle adjustment mechanism 300 operates to make the puncture angle perpendicular to the mother's uterus, it automatically drives the puncture needle guide mechanism 400 to switch from the first state to the second state. Thus, initially, or when the adaptive angle adjustment mechanism 300 has not adjusted to the corresponding angle, the puncture needle guide mechanism 400 is in the first state where it cannot be inserted. After the adaptive angle adjustment mechanism 300 adjusts the puncture angle to be perpendicular to the mother's uterus, the puncture needle guide mechanism 400 switches to the second state, which then facilitates puncture guidance by medical personnel.

[0045] In this embodiment, the specific usage process is as follows: The working area of ​​the device is moved by the movable support mechanism 100, and the adaptive contour sensing mechanism 200 is placed on the abdomen of the parturient. The contour of the parturient's uterus is detected by pure mechanical sensing, thereby determining the position of amniocentesis. Once the puncture position is determined, the adaptive angle adjustment mechanism 300 works to ensure that the puncture angle is always perpendicular to the parturient's uterus, thereby preventing the puncture angle from shifting when the parturient breathes, which would lead to inaccurate puncture angle. When the adaptive angle adjustment mechanism 300 keeps the puncture position perpendicular to the parturient's uterus, the puncture needle guide mechanism 400 automatically switches to the second state, which facilitates the medical staff to start the puncture guidance work. The whole process does not rely on electronic devices, and the puncture angle can be easily adjusted according to the parturient's body posture, making it more reliable.

[0046] Example 2

[0047] Based on Embodiment 1, the adaptive contour sensing mechanism 200 includes a sensing ring 210 whose top is connected to the bottom of the flexible connector 120 and a plurality of elastic sensing elements 220 evenly distributed at the bottom of the sensing ring 210. The sensing ring 210 is used to facilitate the connection of the elastic sensing elements 220. After the elastic sensing elements 220 come into contact with the abdomen of the mother, the contour of the uterus is gradually found through the elastic feedback of each elastic sensing element 220, thereby determining the puncture position.

[0048] In this embodiment, the elastic sensing element 220 includes a sensing head 220a located below the sensing ring 210 and an elastic element 220b connected at one end to the sensing head 220a and at the other end to the bottom of the sensing ring 210. The sensing head 220a is used to contact and fit against the abdomen of the mother, and has a low-friction ball head at the end to reduce the friction between the sensing head 220a and the mother's skin during movement. The elastic element 220b is used to provide a buffer force between the sensing head 220a and the mother's abdomen to reduce the pressure on the mother's abdomen. When multiple elastic elements 220b sense the same feedback pressure, the outline of the mother's uterus is determined.

[0049] In this embodiment, the specific workflow is as follows: The sensing ring 210 is placed on the abdomen of the mother, so that each sensing head 220a is in contact with the abdomen of the mother. Then, the sensing ring 210 is moved to explore. At this time, the elastic element 220b is compressed by pressure. The pre-pressure of each elastic element 220b is set in advance. When the compression amount of multiple elastic elements 220b is the same, it matches the pressure of the amniotic fluid position in the mother's abdomen. At this time, the positions of multiple sensing heads 220a mark the outline of the mother's uterus, thereby determining the location of amniocentesis. Traditional ultrasound probes apply pressure and change the shape of the uterus. The light touch design ensures that the positioning is based on the organ outline in its natural state.

[0050] Example 3

[0051] Based on Embodiment 2, the adaptive angle adjustment mechanism 300 includes a base 310 whose top is connected to the bottom of the connecting frame 130 and has a mounting bracket 310a on top, a gravity block 320 freely suspended on the mounting bracket 310a, a swing arm 330 pulverizedly connected to the puncture needle guide mechanism 400, and an adaptive adjustment component 340 whose one end is pulverizedly connected to the gravity block 320 and the other end is pulverizedly connected to the swing arm 330. The base 310 is used to facilitate the support of each component, and the mounting bracket 310a... The gravity block 320 is used to facilitate the installation of the gravity block 320. The gravity block 320 is used to adaptively adjust the angle of the swing arm 330 by always being perpendicular to the ground under the action of gravity. When the swing arm 330 rotates, it drives the puncture needle guide mechanism 400 to rotate, thereby facilitating its support and fixation. After the puncture position is determined, the adaptive adjustment component 340 is used to drive the swing arm 330 to rotate by the characteristic that the gravity block 320 is always vertically downward, so that the puncture needle guide mechanism 400 is always perpendicular to the uterus.

[0052] In this embodiment, the bottom of the gravity block 320 is rotatably connected to a first hinge seat 320a, which is used to facilitate hinge connection with the hinge frame 340d.

[0053] The adaptive adjustment component 340 includes a bevel gear set 340a mounted on the top of the base 310 and connected at one end to the swing arm 330 via a rotating shaft; a second hinge seat 340b located at the other end of the bevel gear set 340a; a hinge plate 340c hinged at one end to the second hinge seat 340b; a hinge frame 340d hinged at one end to the first hinge seat 320a and slidably connected to the inner side of a third hinge seat 340d-1; and a trigger component 340e with one end drivenly connected to the bevel gear set 340a and the other end drivenly connected to the adaptive contour sensing mechanism 200. The bevel gear set 340a is used to drive the swing arm 330 to rotate when it rotates. The second hinge seat 340b is used to facilitate hinged hinge plate 340c, thereby... When the hinge plate 340c rotates, it drives the bevel gear set 340a to rotate. The hinge plate 340c is used to connect the second hinge seat 340b and the third hinge seat 340d-1. The hinge frame 340d is used to hinge with the first hinge seat 320a and facilitate the sliding connection of the third hinge seat 340d-1. The end of the hinge plate 340c away from the second hinge seat 340b is hinged with the third hinge seat 340d-1. Thus, under the action of the connection group of the first hinge seat 320a, the hinge frame 340d, the third hinge seat 340d-1, the hinge plate 340c and the second hinge seat 340b, a universal connection is formed between the gravity block 320 and the bevel gear set 340a. Thus, when the gravity block 320 swings, it drives the bevel gear set 340a to rotate.

[0054] In this embodiment, the bottom of the sensing ring 210 is provided with multiple through holes corresponding to the sensing head 220a, the top of the sensing head 220a is provided with a push rod corresponding to the through hole, the inner side of the sensing ring 210 is provided with an annular shell 210a communicating with the multiple through holes, and the top of the annular shell 210a is provided with a first connection port 210a-1 communicating with the inside of the annular shell 210a. During the sensing process of the sensing head 220a, when it moves to the uterine contour position, multiple elastic elements 220b are compressed by the same amount, and all push rods are pushed into the through holes. The air in the multiple through holes is squeezed into the annular shell 210a and guided to the position of the second connection port 340e-11 through the first connection port 210a-1. A one-way valve is provided in the connection channel between the multiple through holes and the annular shell 210a to prevent the air squeezed in the other through holes from being lost through this point when some push rods are not fully pushed into the corresponding through holes.

[0055] The side wall of the rotating shaft connecting the bevel gear set 340a and the first hinge seat 320a is uniformly provided with a plurality of sawtooth blocks 340a-1, which are used to cooperate with the limiting block 340e-2 to limit the bevel gear set 340a, thereby locking the entire adaptive sensing component.

[0056] The triggering component 340e includes a sleeve 340e-1 located on the top of the base 310 and having a second connection port 340e-11 on its side wall, and a limiting block 340e-2 movably installed inside the sleeve 340e-1 and having a side wall that engages with the gap between the plurality of sawtooth blocks 340a-1. The first connection port 210a-1 is connected to the second connection port 340e-11 via a hose. The sleeve 340e-1 is used to push the limiting block 340e-2 upward when air is introduced into the annular box through the hose and the internal air is compressed. The limiting block 340e-2 is used to cooperate with the plurality of sawtooth blocks 340a-1 to lock and limit the bevel gear set 340a.

[0057] In this embodiment, the specific workflow is as follows: When multiple sensing heads 220a sense the outline of the uterus, the elastic element 220b is compressed by the same amount (the preload of the elastic element 220b is set in advance), and at this time, multiple push rods are pushed into the through hole. The air in the through hole is squeezed into the annular housing 210a, and then introduced into the sleeve 340e-1 through the first connection port 210a-1. After the air pressure in the sleeve 340e-1 increases, the limiting block 340e-2 is pushed upward. At this time, the limiting block 340e... -2 and multiple sawtooth blocks 340a-1 are respectively, and the adaptive sensing component is unlocked. When the mother breathes or changes her body posture, the gravity block 320 swings under its own weight, always keeping it perpendicular to the mother's abdomen and uterus. Under the action of the universal connection, it drives the bevel gear group 340a to rotate. When the bevel gear group 340a rotates, it drives the swing arm 330 to rotate, so that the swing arm 330 is always perpendicular to the position of the mother's uterus, thereby driving the puncture needle guide mechanism 400 to be perpendicular to the mother's uterus and avoiding the deviation of the puncture angle.

[0058] In addition, under the mechanical linkage of the adaptive contour sensing mechanism 200 and the adaptive angle adjustment mechanism 300, dynamic respiratory compensation is provided for the parturient. The mechanical feedback cancels the abdominal wall movement caused by breathing in real time, and the puncture process does not require the patient to hold their breath, reducing the tension and risk of operation.

[0059] Example 4

[0060] Based on Embodiment 3, the puncture needle guide mechanism 400 includes a needle insertion assembly connected to the swing arm 330 and an on / off assembly 420 installed on the sensing ring 210 and corresponding to the needle insertion assembly. The needle insertion assembly is used to guide the puncture needle insertion, and the on / off assembly 420 is used to limit the needle insertion assembly when the puncture guide position is not perpendicular to the position of the mother's uterus, thereby avoiding misoperation.

[0061] In this embodiment, the needle insertion assembly includes a threaded guide cylinder 410a rigidly connected to the sidewall of the swing arm 330, a spiral puncture cylinder 410b threadedly connected to the threaded guide cylinder 410a, and a rotating component 410c that drives the spiral puncture cylinder 410b to extend and retract within the threaded guide cylinder 410a. The threaded guide cylinder 410a is used to determine and guide the needle insertion direction, the spiral puncture cylinder 410b is used to drive the puncture needle to move and puncture during needle insertion, and the rotating component 410c is used to facilitate medical personnel to drive the spiral puncture cylinder 410b to rotate and move within the threaded guide cylinder 410a.

[0062] In this embodiment, the rotating component 410c includes a plurality of connecting rods 410c-1 located on the side wall of the threaded guide cylinder 410a and a knob 410c-2 whose bottom is slidably connected to the other end of the connecting rods 410c-1 and whose side wall has a plurality of handles. The connecting rods 410c-1 are used to facilitate the connection of the knob 410c-2, and the knob 410c-2 is used to facilitate the movement of the spiral puncture cylinder 410b within the threaded guide cylinder 410a when rotated.

[0063] The side wall of the threaded guide cylinder 410a has an elastic sound-emitting block 410a-1 corresponding to the handle. When the knob 410c-2 is rotated, the handle will collide with the elastic sound-emitting block 410a-1 once for each certain angle of rotation. This makes it easier for medical staff to judge the rotation angle based on the number of sounds heard, and thus determine the depth of needle insertion.

[0064] In this embodiment, the on / off assembly 420 includes a receiving seat 420a mounted on the top of the sensing ring 210 and a gravity ball 420b connected to the receiving seat 420a and having a guide tube 420b-1 at its top. The guide tube 420b-1 passes through the receiving seat 420a and is adapted to the spiral puncture cylinder 410b. The bottom sidewall of the guide tube 420b-1 has a counterweight chain 420b-11. The receiving seat 420a is used to connect with the gravity ball 420b. The gravity ball 420b is used to ensure that the guide tube 420b-1 is always perpendicular to the direction of the mother's uterus. The guide tube 420b-1 facilitates the needle to pass through the guide tube 420b-1 for continuous needle insertion when the spiral puncture cylinder 410b is at an angle perpendicular to the mother's uterus. When the spiral puncture cylinder 410b (i.e. the entire puncture assembly 410) is not perpendicular to the position of the mother's uterus, the spiral puncture cylinder 410b and the guide tube 420b-1 cannot be aligned, and needle insertion cannot be performed.

[0065] In this embodiment, the specific workflow is as follows: When the swing arm 330 rotates to be perpendicular to the position of the mother's uterus, both the threaded guide cylinder 410a and the spiral puncture cylinder 410b are perpendicular to the position of the mother's uterus. At this time, the spiral puncture cylinder 410b is aligned with the guide tube 420b-1. Then, the knob 410c-2 is rotated so that the spiral puncture cylinder 410b passes through the guide tube 420b-1, facilitating continuous needle insertion. When neither the threaded guide cylinder 410a nor the spiral puncture cylinder 410b is perpendicular to the position of the mother's uterus, the spiral puncture cylinder 410b cannot be aligned with the guide tube 420b-1. Therefore, under the restriction of the guide tube 420b-1, the spiral puncture cylinder 410b cannot move continuously, and thus cannot perform puncture work, avoiding operator error.

[0066] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An amniocentesis positioning device used in a prenatal diagnostic center, characterized in that, include: The support mechanism (100) includes a support frame (110), a flexible telescopic member connected at one end to the support frame (110), and a connecting frame (130) connected at one end to the support frame (110); An adaptive contour sensing mechanism (200) is installed at the end of the flexible telescopic member away from the support frame (110), wherein the adaptive contour sensing mechanism (200) determines the puncture position by purely mechanically sensing the contour of the mother's uterus. An adaptive angle adjustment mechanism (300) is installed at one end of the connecting frame (130) away from the support frame (110). When the adaptive contour sensing mechanism (200) senses the puncture position, the adaptive angle adjustment mechanism (300) is automatically triggered to work, so that the puncture angle is always perpendicular to the position of the amniotic fluid in the mother's uterus. The puncture needle guide mechanism (400) corresponds to the adaptive contour sensing mechanism (200). The puncture needle guide mechanism (400) has a first state when it is locked and cannot be inserted into the needle, and a second state when it is unlocked and can be inserted into the needle. When the adaptive angle adjustment mechanism (300) works so that the puncture angle is perpendicular to the uterus of the parturient, the puncture needle guide mechanism (400) is automatically driven to switch from the first state to the second state.

2. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 1, characterized in that, The adaptive contour sensing mechanism (200) includes a sensing ring (210) whose top is connected to the bottom of the flexible connector (120) and a plurality of elastic sensing elements (220) evenly distributed at the bottom of the sensing ring (210).

3. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 2, characterized in that, The elastic sensing element (220) includes a sensing head (220a) located below the sensing ring (210) and an elastic element (220b) with one end connected to the sensing head (220a) and the other end connected to the bottom of the sensing ring (210).

4. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 3, characterized in that, The adaptive angle adjustment mechanism (300) includes a base (310) whose top is connected to the bottom of the connecting frame (130) and has a mounting frame (310a) on top, a gravity block (320) freely suspended on the mounting frame (310a), a swing arm (330) that is pulsatorically connected to the puncture needle guide mechanism (400), and an adaptive adjustment component (340) whose one end is pulsatorically connected to the gravity block (320) and the other end is pulsatorically connected to the swing arm (330).

5. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 4, characterized in that, The bottom of the gravity block (320) is rotatably connected to a first hinge seat (320a); The adaptive adjustment assembly (340) includes a bevel gear set (340a) mounted on the top of the base (310) and connected at one end to the swing arm (330) via a rotating shaft, a second hinge seat (340b) located at the other end of the bevel gear set (340a), a hinge plate (340c) hinged at one end to the second hinge seat (340b), a hinge frame (340d) hinged at one end to the first hinge seat (320a) and slidably connected to the inner side of a third hinge seat (340d-1), and a trigger assembly (340e) driven at one end to the bevel gear set (340a) and driven at the other end to the adaptive contour sensing mechanism (200). The end of the hinge plate (340c) away from the second hinge seat (340b) is hinged to the third hinge seat (340d-1).

6. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 5, characterized in that, The bottom of the sensing ring (210) is provided with multiple through holes corresponding to the sensing head (220a), the top of the sensing head (220a) is provided with a top rod corresponding to the through holes, the inner side of the sensing ring (210) is provided with an annular shell (210a) communicating with the multiple through holes, the top of the annular shell (210a) is provided with a first connection port (210a-1) communicating with the inside of the annular shell (210a), wherein a one-way valve is provided in the connection channel between the multiple through holes and the annular shell (210a); The side wall of the shaft connecting the bevel gear set (340a) and the first hinge seat (320a) is uniformly provided with a plurality of sawtooth blocks (340a-1); The trigger assembly (340e) includes a sleeve (340e-1) located on the top of the base (310) and having a second connection port (340e-11) on its side wall, and a limiting block (340e-2) movably installed inside the sleeve (340e-1) and having a side wall that engages with the gap between the plurality of sawtooth blocks (340a-1). The first connection port (210a-1) is connected to the second connection port (340e-11) via a hose.

7. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 4, characterized in that, The puncture needle guide mechanism (400) includes a needle insertion assembly connected to the swing arm (330) and an on / off assembly (420) mounted on the sensing ring (210) and corresponding to the needle insertion assembly.

8. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 7, characterized in that, The needle insertion assembly includes a threaded guide cylinder (410a) whose sidewall is rigidly connected to the swing arm (330), a spiral puncture cylinder (410b) threadedly connected to the threaded guide cylinder (410a), and a rotating component (410c) that drives the spiral puncture cylinder (410b) to extend and retract within the threaded guide cylinder (410a).

9. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 8, characterized in that, The rotating component (410c) includes a plurality of connecting rods (410c-1) located on the side wall of the threaded guide cylinder (410a) and a knob (410c-2) whose bottom is slidably connected to the other end of the connecting rods (410c-1) and whose side wall has a plurality of handles. The side wall of the threaded guide cylinder (410a) has an elastic sound-generating block (410a-1) corresponding to the handle.

10. The amniocentesis positioning device for use in a prenatal diagnostic center according to claim 9, characterized in that, The on / off assembly (420) includes a receiving seat (420a) mounted on the top of the sensing ring (210) and a gravity ball (420b) ball connected to the receiving seat (420a) and having a guide tube (420b-1) on the top. The guide tube (420b-1) passes through the receiving seat (420a) and is adapted to the spiral puncture cylinder (410b). The bottom sidewall of the guide tube (420b-1) has a counterweight chain (420b-11).

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