A prenatal diagnosis examination device for gynecology and obstetrics

Abstract

The present application relates to the technical fields of prenatal diagnosis, and discloses a prenatal diagnosis examination device for clinical gynaecology and obstetrics, which comprises a puncture needle for puncture and a control handle fixedly connected to the tail end of the puncture needle, a crushing material passing ball is rotatably connected to the inside of the puncture needle, the crushing material passing ball comprises a plurality of first circular rings and second circular rings which are staggered and slidably connected, and cutting edges are fixedly connected to the first circular rings and the second circular rings; when the rotating knob rotates, the winding roller also rotates, so that the first circular rings and the second circular rings rotate synchronously; at this time, the impurities which are blocked in the gap between the crushing material passing ball and the puncture needle are affected by the rotation of the first circular rings and the second circular rings and the insertion of the cutting edges, so that the impurities are driven to rotate to the inside of the puncture needle; in combination with the negative pressure effect of the negative pressure bottle, the impurities are sucked into the inside, the collection of the impurities is completed, and then the impurities are conveniently examined and diagnosed.

Description

Technical Field

[0001] This invention relates to the field of prenatal diagnostic technology, specifically a prenatal diagnostic examination device for use in obstetrics and gynecology clinical practice. Background Technology

[0002] Amniocentesis, commonly known as amniocentesis, is a common prenatal diagnostic procedure. A needle is inserted into the amniotic cavity, which contains a large amount of amniotic fluid, including shed fetal epithelial cells (skin debris), urine, and some kidney cells. By extracting this amniotic fluid, fetal cells can be collected for prenatal diagnosis. The most common use is for chromosome or gene testing to determine if the fetus has chromosomal abnormalities or genetic defects.

[0003] Because amniotic fluid contains shed epithelial cells (skin desquamation), urine, and some shed kidney cells, it contains a certain amount of non-liquid substances. The presence of these substances can provide a reference for subsequent examinations and diagnoses. During the extraction process, if these substances are to be extracted, the diameter of the puncture needle needs to be increased, which increases the puncture wound area and pain. If the needle diameter is reduced, it is easy for foreign objects to block the flow. If the foreign object is pushed inward to clear the blockage, it is easy for the fluid to flow back into the amniotic cavity or for air to be injected, which can have adverse effects. If the needle is withdrawn and then pushed back in, the second insertion is also cumbersome and even risky. Summary of the Invention

[0004] The purpose of this invention is to provide a prenatal diagnostic examination device for obstetrics and gynecology clinical practice, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A prenatal diagnostic examination device for obstetrics and gynecology clinical use includes a puncture needle for puncture and a control handle fixedly connected to the tail end of the puncture needle. A pulverizing ball is rotatably connected to the upper part of the puncture needle. The pulverizing ball includes a plurality of staggered first and second circular rings that are slidably connected to each other. A cutting blade is fixedly connected to both the first and second circular rings. Rotation knobs for controlling the rotation of the first and second circular rings and the direction of rotation are rotatably connected to the outside of the control handle.

[0007] As a further aspect of the present invention: the top of the puncture needle is fixedly connected to an arc-shaped puncture port, the diameter of which is larger than the diameter of the crushing feed ball.

[0008] As a further embodiment of the present invention: the inside of the crushing ball is respectively provided with a central tube and an inner tube, the inner tube is rotatably connected to the inside of the central tube, the outside of the central tube is provided with a plurality of rotating grooves, the outer wall of the inner tube is fixedly connected with an inner connecting column, and the first circular ring is fixedly connected to the inner tube through the inner connecting column.

[0009] As a further embodiment of the present invention: a central connecting post is fixedly connected to the outer wall of the central tube, and the central tube and the second circular ring are fixedly connected through the central connecting post.

[0010] As a further embodiment of the present invention: connecting rollers are fixedly connected to both the end of the central tube and the end of the inner tube, and the connecting rollers extend to the outside of the crushing feed ball.

[0011] As a further embodiment of the present invention: the control handle has two symmetrically distributed control cavities inside, and a take-up roller is rotatably connected inside the control cavity. The take-up roller is rotatably connected to the control cavity via a rotating seat. The rotating knob is fixedly connected to the take-up roller via a connecting shaft. A rotating hole is provided on the outside of the control cavity, and the connecting shaft is rotatably connected inside the rotating hole. The take-up roller and the connecting roller are connected by a traction rope. The traction rope is wound around the outside of the take-up roller, and the other end of the traction rope is wound around the outside of the take-up roller. Both the take-up roller and the connecting roller have double threads.

[0012] As a further embodiment of the present invention: the top of the control cavity is provided with a threading groove that communicates with the puncture needle, the traction rope passes through the threading groove and enters the interior of the take-up roller, the corner of the threading groove is provided with an arc-shaped surface, and the bottom of the control cavity is provided with a water filter groove.

[0013] As a further embodiment of the present invention: the inner wall of the puncture needle is fixedly connected to a guide tube for guiding the traction rope, and the top and bottom ends of the guide tube are provided with threading holes, and the traction rope is slidably connected inside the guide tube.

[0014] As a further embodiment of the present invention: the tail end of the control handle is fixedly connected to a negative pressure bottle through a guide tube, and the puncture needle and the negative pressure bottle are interconnected through the guide tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Control the rotation knob on one side to rotate. When the knob rotates, the take-up roller will also rotate, so that the first and second circular rings rotate synchronously. At this time, the impurities that are stuck in the gap between the crushing ball and the piercing needle will be affected by the rotation of the first and second circular rings and the insertion of the cutting blade into the impurities, which will drive the impurities to rotate into the piercing needle. Combined with the negative pressure of the negative pressure bottle, the impurities are sucked into the interior, completing the collection of impurities, which facilitates the inspection and diagnosis of impurities.

[0017] Rotating the two knobs in opposite directions at a certain angle causes impurities on the surface of the feed ball to be affected by the insertion of the cutting blade. Simultaneously, the alternating rotation of the first and second circular rings continuously pulverizes the impurities, preventing blockage of the tube opening. If impurity collection is required, one connecting roller can be rotated individually at a certain angle, followed by simultaneous counter-rotation of both connecting rollers to achieve pulverization. The pulverized impurities will then be located in the gap between the feed ball and the piercing needle. After pulverization, one connecting roller can be rotated in one direction, or both connecting rollers can rotate in the same direction, allowing the impurities to be further pulverized by the cutting blade. The material rotates towards the inside of the puncture needle, causing impurities to be cut into smaller pieces, making material collection easier and allowing for various applications. The reason for the reciprocating motion is that the rotation angle of the inner connecting column is limited by the setting of the rotating groove. Furthermore, the rotation angle that a person can rotate is also limited by controlling the rotation of the connecting roller with two fingers. Therefore, the inner connecting column simplifies the structure of the crushing ball, making it simpler and smaller, and adaptable to finger operation. It simultaneously achieves forward feeding and reciprocating reverse cutting, serving the dual purpose of collecting and crushing or clearing and crushing materials. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. 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.

[0019] Figure 1 This is a front view schematic diagram of a prenatal diagnostic examination device used in obstetrics and gynecology clinical practice;

[0020] Figure 2 This is a front sectional view of a prenatal diagnostic examination device used in obstetrics and gynecology clinics.

[0021] Figure 3 This is a schematic diagram of the connection between a puncture needle and a guide tube in a prenatal diagnostic examination device used in obstetrics and gynecology clinics.

[0022] Figure 4 This is a three-dimensional schematic diagram of a pulverizing ball in a prenatal diagnostic examination device used in obstetrics and gynecology clinics;

[0023] Figure 5 This is a front cross-sectional view of a pulverizing feed ball in a prenatal diagnostic examination device used in obstetrics and gynecology clinics.

[0024] Figure 6 This is a front sectional view of a control handle in a prenatal diagnostic examination device used in obstetrics and gynecology clinics.

[0025] In the diagram: 1. Puncture needle; 11. Lead tube; 12. Threading hole; 13. Arc-shaped puncture opening; 2. Crushing ball; 21. First circular ring; 22. Second circular ring; 23. Cutting blade; 24. Central tube; 241. Central connecting post; 242. Rotating groove; 25. Inner tube; 251. Inner connecting post; 3. Connecting roller; 31. Traction rope; 4. Control handle; 41. Control cavity; 411. Rotating hole; 42. Threading groove; 421. Arc-shaped surface; 43. Filter tank; 44. Guide tube; 45. Negative pressure bottle; 5. Rotating knob; 51. Rewinding roller; 511. Rotating seat; 52. Connecting shaft. Detailed Implementation

[0026] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In an embodiment of the present invention for conveying debris into a puncture needle, the device includes a puncture needle 1 for puncture and a control handle 4 fixedly connected to the tail end of the puncture needle 1. A pulverizing ball 2 is rotatably connected above the interior of the puncture needle 1. The pulverizing ball 2 includes several staggered, mutually slidably connected first circular rings 21 and second circular rings 22. Cutting blades 23 are fixedly connected to both the first circular rings 21 and the second circular rings 22. Rotation knobs 5 for controlling the rotation and direction of rotation of the first circular rings 21 and the second circular rings 22 are rotatably connected to the outside of the control handle 4. An arc-shaped puncture opening 13 is fixedly connected to the top of the puncture needle 1. The diameter of the arc-shaped puncture opening 13 is larger than the diameter of the pulverizing ball 2. The end of handle 4 is fixedly connected to a negative pressure bottle 45 via a guide tube 44. The puncture needle 1 and the negative pressure bottle 45 are interconnected via the guide tube 44. The crushing ball 2 rotates inside the puncture needle 1. During use, the puncture needle 1 is inserted into the amniotic cavity. Due to the presence of the arc-shaped puncture port 13, the crushing ball 2 can be positioned at the front end of the puncture needle 1 without being exposed outside the needle tip, thus avoiding puncture difficulties. The handle 4 is positioned externally, and the guide tube 44 is inserted into the negative pressure bottle 45 through the needle tip. Through the negative pressure inside the negative pressure bottle 45, the amniotic fluid from the amniotic cavity is drawn into the negative pressure bottle 45 via the guide tube 44 and the puncture needle 1. Since the diameter of the crushing ball 2 is smaller than that of the needle, the crushing ball 2... Because of the diameter of the piercing needle 1, impurities can easily get stuck in the space between the crushing ball 2 and the piercing needle 1. At this point, simply controlling the rotation knob 5 on one side will cause the winding roller 51 to rotate. Since the traction rope 31 is wrapped around the outside of the winding roller 51 and is a double rope, the winding roller 51 will cause one end of the rope to wind up while the other end is released. This causes the upper traction rope 31 to release one end of the rope through the winding action of the rope end, and wind up the other end as it is released. This causes the connecting roller 3 to drive the central tube 24 to rotate. The central tube 24 then drives the first circular ring through the inner connecting column 251. When the first circular ring 21 rotates, the inner tube 25 will contact the end of the rotating groove 242 when the central tube 24 rotates to a certain angle. Then, it will rotate synchronously with the rotation of the central tube 24, so that the first circular ring 21 and the second circular ring 22 can rotate synchronously. At this time, the impurities that are blocked in the gap between the crushing ball 2 and the puncture needle 1 will be affected by the rotation of the first circular ring 21 and the second circular ring 22 and the insertion of the cutting blade 23 into the impurities, which will drive the impurities to rotate into the puncture needle 1. Combined with the negative pressure of the negative pressure bottle 45, the impurities are sucked into the interior, completing the collection of impurities, which facilitates the inspection and diagnosis of impurities.

[0031] Please refer to Figure 2 , Figure 4 , Figure 5In the embodiment of the present invention where the suction of the negative pressure bottle is too slow or stops, the inside of the pulverizing ball 2 is respectively provided with a central tube 24 and an inner tube 25. The inner tube 25 is rotatably connected to the inside of the central tube 24. The outside of the central tube 24 is provided with a plurality of rotating grooves 242. The outer wall of the inner tube 25 is fixedly connected with an inner connecting post 251. The first circular ring 21 is fixedly connected to the inner tube 25 through the inner connecting post 251. The outer wall of the central tube 24 is fixedly connected with a central connecting post 241. The central tube 24 and the second circular ring 22 are fixedly connected through the central connecting post 241. Both the end of tube 4 and the end of inner tube 25 are fixedly connected to connecting rollers 3, which extend to the outside of the crushing ball 2. The operator operates two rotary knobs 5. During operation, simply rotate the two rotary knobs 5 in opposite directions at a certain angle, repeating the operation. When the two rotary knobs 5 rotate in opposite directions, the central tube 24 and inner tube 25 rotate in opposite directions, thereby driving the first circular ring 21 and the second circular ring 22 to rotate alternately through the central connecting column 241 and inner connecting column 251. At this time, impurities on the surface of the crushing ball 2 are affected by the insertion of the cutting blade 23, and simultaneously... The alternating rotation of the first circular ring 21 and the second circular ring 22 continuously crushes impurities, thus preventing them from clogging the pipe opening. If impurity collection is required, one connecting roller 3 can be rotated at a certain angle first, and then the two connecting rollers 3 can rotate synchronously in opposite directions to form a crushing effect. At this time, the crushed impurities will be located in the gap between the crushing ball 2 and the piercing needle 1. After crushing, one connecting roller 3 can be rotated in one direction, or the two connecting rollers 3 can rotate in the same direction. The cutting blade 23 rotates towards the impurities and into the piercing needle 1. After being cut, the impurities are... The material is smaller, making material collection more convenient and allowing for more diverse usage methods. The reason for the reciprocating motion is that the rotation angle of the inner connecting column 251 is limited by the setting of the rotating groove 242. Furthermore, the angle that a person can rotate is also limited when controlling the rotation of the connecting roller 3 with two fingers. Therefore, the setting of the inner connecting column 251 can simplify the structure of the crushing ball 2, making the structure simpler and smaller, and adapting to the operation and rotation of fingers. At the same time, it can achieve the dual functions of forward feeding, reciprocating reverse cutting, and collecting and crushing or clearing and crushing materials.

[0032] Please refer to Figure 3 , Figure 6In the embodiment of the arrangement of the traction rope, rotating knob, and control handle structure in this invention, the control handle 4 has two symmetrically distributed control cavities 41 inside. A take-up roller 51 is rotatably connected inside each control cavity 41. The take-up roller 51 and the control cavity 41 are rotatably connected via a rotating seat 511. The rotating knob 5 is fixedly connected to the take-up roller 51 via a connecting shaft 52. A rotating hole 411 is provided outside the control cavity 41, and the connecting shaft 52 is rotatably connected inside the rotating hole 411. The take-up roller 51 and the connecting roller 3 are connected via a traction rope 31. The traction rope 31 is wound around the outside of the take-up roller 51, and the other end of the traction rope 31 is wound around... On the outside of the take-up roller 51, both the take-up roller 51 and the connecting roller 3 have double threads. The top of the control cavity 41 has a threading groove 42 that communicates with the piercing needle 1. The traction rope 31 passes through the threading groove 42 and enters the interior of the take-up roller 51. The corner of the threading groove 42 has an arc-shaped surface 421. The bottom of the control cavity 41 has a water filter groove 43. The inner wall of the piercing needle 1 is fixedly connected to a guide tube 11 for guiding the traction rope 31. The top and bottom of the guide tube 11 have threading holes 12. The traction rope 31 is slidably connected inside the guide tube 11. The traction rope 31 serves as a connection between the take-up roller 51 and the connecting roller 3. In order to make the connecting roller 3... To ensure more stable sliding, a guide tube 11 is fixed inside the puncture needle 1. Both ends of the guide tube 11 have threading holes 12, through which the traction rope 31 can pass. This allows the traction rope 31 to slide within the guide tube 11 during sliding, preventing it from remaining inside the puncture needle 1 and ensuring unobstructed flow of fluid. The control handle 4 has a control cavity 41 inside, and the take-up roller 51 rotates within the control cavity 41 via a rotating seat 511. At this time, the traction rope 31 smoothly enters the control cavity 41 through the threading groove 42 and the arc-shaped surface 421. The traction rope 31 is wound around the outside of the take-up roller 51. The rotation of the take-up roller 51 drives the winding and release of the traction rope 31. The control cavity 41 has a rotating hole 411 on its outside. The rotating knob 5 is fixedly connected to the take-up roller 51 through the connecting shaft 52. The rotating hole 411 and the connecting shaft 52 are sealed and rotated through a dynamic sealing ring, which can prevent amniotic fluid from seeping out through the gap between the rotating hole 411 and the connecting shaft 52. At the same time, it makes the channel between the guide tube 11 and the control handle 4 more unobstructed. The bottom surface of the control cavity 41 has a water filter trough 43, which is mainly to allow the liquid to enter the control handle 4, the guide tube 44 and then enter the interior of the negative pressure bottle 45 through the water filter trough 43.

[0033] Workflow: The puncture needle 1 is inserted into the amniotic cavity, the control handle 4 is on the outside, and the guide tube 44 is inserted into the negative pressure bottle 45 through the needle. The negative pressure inside the negative pressure bottle 45 draws amniotic fluid from the amniotic cavity into the negative pressure bottle 45 through the guide tube 44 and the puncture needle 1. Because the diameter of the crushing ball 2 is smaller than the diameter of the puncture needle 1, impurities easily get stuck in the space between the crushing ball 2 and the puncture needle 1. At this time, only one side of the rotating knob 5 needs to be turned. When the knob 5 is turned, the winding roller 51 will also rotate. Since the traction rope 31 is wrapped around the outside of the winding roller 51 and is a double rope, the winding roller 51 will drive one end of the rope to wind up while the other end is released. The upper traction rope 31 will release one end of the rope through the winding action of the winding rope end, and then wind up the other end as it is released. This will cause the connecting roller 3 to drive the central tube 24 to rotate. At this time, the central tube 24 drives the first circular ring 21 to rotate through the inner connecting column 251. When the first circular ring 21 rotates, the inner tube 251 will contact the end of the rotating groove 242 when the central tube 24 rotates to a certain angle. Then, it will rotate synchronously with the rotation of the central tube 24, so that the first circular ring 21 and the second circular ring 22 will rotate synchronously. At this time, the impurities that are blocked in the gap between the crushing ball 2 and the piercing needle 1 will be affected by the rotation of the first circular ring 21 and the second circular ring 22 and cut. The cutting blade 23's insertion of impurities causes them to rotate into the puncture needle 1. Combined with the negative pressure of the negative pressure bottle 45, the impurities are drawn into the bottle, facilitating their collection and inspection. When the two knobs 5 rotate in opposite directions, the central tube 24 and inner tube 25 rotate in opposite directions. This, in turn, causes the first circular ring 21 and the second circular ring 22 to rotate alternately via the central connecting column 241 and the inner connecting column 251. Impurities on the surface of the crushing ball 2 are continuously crushed by the insertion of the cutting blade 23 and the alternating rotation of the first and second circular rings 21 and 22, preventing blockage of the tube opening. If impurity collection is required, one knob can be controlled separately. After the connecting roller 3 rotates to a certain angle, the two connecting rollers 3 rotate synchronously in opposite directions, forming a crushing process. At this time, the crushed impurities will be located in the gap between the crushing ball 2 and the piercing needle 1. After crushing, one connecting roller 3 can be controlled to rotate in one direction, or both connecting rollers 3 can rotate in the same direction. The cutting blade 23 rotates the impurities into the piercing needle 1, making the material smaller after cutting, thus making material collection more convenient and allowing for various usage methods. The reason for the reciprocating motion is that the setting of the rotating groove 242 limits the rotation angle of the inner connecting column 251. Furthermore, the angle that a person can rotate by controlling the rotation of the connecting roller 3 with two fingers is also limited. Therefore, the setting of the inner connecting column 251 simplifies the structure of the crushing ball 2.This simplifies the structure, allowing for a smaller size and adaptability to finger-operated rotation. It simultaneously enables forward feeding and reciprocating reverse cutting, providing a dual function of collecting and crushing materials, or clearing and pulverizing them.

[0034] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prenatal diagnostic examination device for gynecological and obstetrical clinics, characterized in that: The device includes a puncture needle (1) for puncture and a control handle (4) fixedly connected to the tail end of the puncture needle (1). A crushing ball (2) is rotatably connected above the inside of the puncture needle (1). The crushing ball (2) includes several staggered first circular rings (21) and second circular rings (22) that are slidably connected to each other. Cutting blades (23) are fixedly connected to both the first circular ring (21) and the second circular ring (22). Rotation knobs (5) for controlling the rotation of the first circular ring (21) and the second circular ring (22) and the direction of rotation are rotatably connected to the outside of the control handle (4). The top of the puncture needle (1) is fixedly connected to an arc-shaped puncture port (13), the diameter of which is larger than the diameter of the crushing ball (2). The crushing ball (2) is provided with a central tube (24) and an inner tube (25) respectively. The inner tube (25) is rotatably connected to the inside of the central tube (24). The outside of the central tube (24) is provided with several rotating grooves (242). The outer wall of the inner tube (25) is fixedly connected to an inner connecting column (251). The first circular ring (21) and the inner tube (25) are fixedly connected through the inner connecting column (251).

2. The device for prenatal diagnosis examination in gynecological clinic according to claim 1, characterized in that it comprises: The outer wall of the central tube (24) is fixedly connected to a central connecting column (241), and the central tube (24) and the second circular ring (22) are fixedly connected through the central connecting column (241).

3. The device for prenatal diagnosis examination in gynecological clinic according to claim 1, characterized in that it comprises: Both the end of the central tube (24) and the end of the inner tube (25) are fixedly connected to connecting rollers (3), which extend to the outside of the crushing ball (2).

4. The device for prenatal diagnosis examination in gynaecology and obstetrics of claim 3, wherein: The control handle (4) has two symmetrically distributed control cavities (41) inside. A take-up roller (51) is rotatably connected inside the control cavity (41). The take-up roller (51) and the control cavity (41) are rotatably connected by a rotating seat (511). The rotating knob (5) and the take-up roller (51) are fixedly connected by a connecting shaft (52). A rotating hole (411) is provided on the outside of the control cavity (41). The connecting shaft (52) is rotatably connected inside the rotating hole (411). The take-up roller (51) and the connecting roller (3) are connected by a traction rope (31). The traction rope (31) is wound around the outside of the take-up roller (51). The other end of the traction rope (31) is wound around the outside of the take-up roller (51). Both the take-up roller (51) and the connecting roller (3) have double threads.

5. The device for prenatal diagnosis examination in gynecological clinic according to claim 4, characterized in that it comprises: The top of the control cavity (41) is provided with a threading groove (42) that communicates with the puncture needle (1). The traction rope (31) passes through the threading groove (42) and enters the interior of the take-up roller (51). An arc-shaped surface (421) is provided at the corner of the threading groove (42). A water filter groove (43) is provided at the bottom of the control cavity (41).

6. The device for prenatal diagnostic examination in gynecology and obstetrics according to claim 4, characterized in that it comprises: The inner wall of the puncture needle (1) is fixedly connected to a guide tube (11) for guiding the traction rope (31). The top and bottom of the guide tube (11) are provided with thread holes (12), and the traction rope (31) is slidably connected inside the guide tube (11).

7. The device for prenatal diagnostic examination in gynecology and obstetrics of claim 1, wherein: The tail end of the control handle (4) is fixedly connected to a negative pressure bottle (45) through a guide tube (44), and the puncture needle (1) and the negative pressure bottle (45) are interconnected through the guide tube (44).

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