Amniotic fluid puncture needle

Abstract

The utility model discloses an amniotic fluid puncture needle which comprises an inner needle seat, an outer needle seat, an outer needle tube, an inner needle, a rubber plug, a protruding part, a suction hole and a clamping protrusion. By pushing the inner needle base, the inner needle ejects the rubber plug out of the outer needle tube, when the inner needle ejects the rubber plug to the clamping protrusion, the inner needle base is pulled out, the outer needle base is connected with an external suction device, amniotic fluid can enter through the suction hole of the outer needle base and is extracted and collected, and the situation that a fetus is scratched in the collection process is avoided through pushing out of the rubber plug.

Description

Technical Field

[0001] This utility model relates to the field of amniocentesis needles, and specifically to an amniocentesis needle. Background Technology

[0002] Amniotic fluid exists within the amniotic cavity. The amniotic cavity forms around the seventh day after fertilization, and amniotic fluid begins to be produced. Amniocentesis is a method of prenatal diagnosis, generally suitable for prenatal diagnosis in mid-pregnancy. Under ultrasound guidance, a thin needle is inserted through the pregnant woman's abdomen and uterine wall into the amniotic cavity to extract some amniotic fluid. This process is called "amniocentesis." Currently, conventional amniocentesis needles only have a small hole at the tip. During the extraction process, fetal movement may block the hole, preventing amniotic fluid from being extracted and interfering with the sampling. Furthermore, the needle tip is sharp, posing a risk of injuring the fetus during the extraction process. Utility Model Content

[0003] The purpose of this invention is to provide an amniocentesis needle to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an amniocentesis needle, comprising:

[0005] An outer needle hub, one end of which is fixedly connected to an outer needle tube, and a rubber stopper is placed inside the end of the outer needle tube away from the outer needle hub;

[0006] Inner needle seat; one end of the inner needle seat is fixedly connected to an inner needle, which is inserted into the outer needle tube and is used to push the rubber plug out of the outer needle tube.

[0007] Preferably, the top of the rubber stopper is provided with a protrusion, and the end of the outer needle tube is provided with a snap-fit ​​protrusion, which cooperates with the protrusion to limit the rubber stopper.

[0008] Preferably, a plurality of suction holes are evenly provided on the side wall of the end of the outer needle tube away from the outer needle seat.

[0009] Preferably, the inner needle seat is inserted into the outer needle seat.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] When puncture is performed through the outer needle tube, the rubber stopper is completely inside the outer needle tube to block it. After the puncture is completed, the inner needle seat is pushed in, so that the inner needle 4 pushes the rubber stopper out of the outer needle tube 3. The length of the rubber stopper extending out exceeds the needle tip of the outer needle tube, thus blocking the needle tip of the outer needle tube and preventing the fetus from being scratched. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the present invention;

[0014] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0015] Figure 4 This is a schematic diagram of the outer needle holder of this utility model;

[0016] Figure 5 for Figure 4 Enlarged view of point B in the image;

[0017] In the diagram: 1. Inner needle seat; 2. Outer needle seat; 3. Outer needle tube; 4. Inner needle; 5. Rubber stopper; 6. Protrusion; 7. Suction hole; 8. Snap-fit ​​protrusion. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5 The present invention provides a technical solution: an amniocentesis needle, comprising:

[0020] An outer needle holder 2, one end of which is fixedly connected to an outer needle tube 3, and a rubber stopper 5 is placed inside the end of the outer needle tube 3 away from the outer needle holder 2;

[0021] Inner needle seat 1; one end of the inner needle seat 1 is fixedly connected to an inner needle 4, the inner needle 4 is inserted into the outer needle tube 3, and the inner needle 4 is used to push the rubber plug 5 out of the outer needle tube 3.

[0022] When using this application, puncture is first performed through the outer needle tube 3, and at this time the rubber plug 5 is completely inside the outer needle tube 3 and blocks the outer needle tube 3, so it will not affect the puncture; after the puncture is in place, the inner needle seat 1 is pushed in, so that the inner needle 4 pushes the rubber plug 5 out of the outer needle tube 3, and the length of the rubber plug 5 extending out exceeds the needle tip of the outer needle tube 3, so that the needle tip of the outer needle tube 3 is blocked by the rubber plug 5, thus avoiding the situation of the fetus being scratched.

[0023] In this embodiment, a protrusion 6 is provided on the top of the rubber stopper 5, and a locking protrusion 8 is provided inside the end of the outer needle tube 3. The locking protrusion 8 cooperates with the protrusion 6 to limit the rubber stopper 5. By providing the locking protrusion 8 inside the end of the outer needle tube 3, the locking protrusion 8 can abut against and prevent the protrusion 6 from being excessively pushed out. That is, when the inner needle 4 pushes the rubber stopper 5 out of the outer needle tube 3, the locking protrusion 8 can prevent the rubber stopper 5 from being excessively pushed out and falling out of the outer needle tube 3.

[0024] In this embodiment, a plurality of suction holes 7 are evenly provided on the side wall of the outer needle tube 3 away from the outer needle seat 2. When the inner needle 4 pushes the rubber stopper 5 to the locking protrusion 8, the inner needle seat 1 is pulled out, and the outer needle seat 2 is connected to an external suction device. Amniotic fluid can enter through the suction holes 7 of the outer needle seat 2 and be extracted and collected.

[0025] In this embodiment, the inner needle seat 1 is inserted into the outer needle seat 2.

[0026] The working principle and usage process of this invention are as follows: When in use, puncture is first performed through the outer needle tube 3. After the puncture is in place, the inner needle seat 1 is pushed in, so that the inner needle 4 pushes the rubber plug 5 out of the outer needle tube 3. When the inner needle 4 pushes the rubber plug 5 to the locking protrusion 8, the inner needle seat 1 is pulled out, and the outer needle seat 2 is connected to the external suction device. Amniotic fluid can enter through the suction hole 7 of the outer needle seat 2 and be extracted and collected.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An amniocentesis needle, characterized in that, Include: The outer needle base (2) is fixedly connected with the outer needle tube (3) at one end, and a rubber plug (5) is placed in the end of the outer needle tube (3) away from the outer needle base (2); The inner needle base (1) is fixedly connected with the inner needle (4) at one end, and the inner needle (4) is inserted into the outer needle tube (3), and the inner needle (4) is used for ejecting the rubber plug (5) out of the outer needle tube (3).

2. The amniocentesis needle according to claim 1, wherein: The top of the rubber plug (5) is provided with a protruding part (6), and the end of the outer needle tube (3) is provided with a clamping protrusion (8), which cooperates with the protruding part (6) to limit the rubber plug (5).

3. An amniocentesis needle according to claim 2, wherein: A plurality of suction holes (7) are uniformly formed in the side wall of the end of the outer needle tube (3) away from the outer needle base (2).

4. An amniocentesis needle according to claim 3, wherein: The inner needle base (1) is inserted into the outer needle base (2).

Images