A fine puncture needle with single-handed control of needle core rebound

Abstract

A fine puncture needle with a needle core rebound controlled by one hand comprises a brake release limiter, a pressure rod, a needle core, a support spring and a needle sheath. The brake release limiter is provided with a pressure rod jack and a needle core jack, the brake release limiter is provided with a component installation space, the lower end of the pressure rod is provided with a limit seat, the limit seat is located in the component installation space, the needle sheath is installed at the bottom of the brake release limiter, the upper end of the needle core is connected to the limit seat, the support spring is sleeved on the needle core, the upper end of the support spring abuts against the limit seat, the lower end of the support spring abuts against the brake release limiter, a limit seat clamp is provided on the side wall of the component installation space, and pull rings are provided on both sides of the brake release limiter. The pull ring can drive the limit seat clamp on the brake release limiter to move, thereby preventing tissue cells with no diagnostic value from entering the needle sheath before reaching the target, and after reaching the target, allowing cells with diagnostic value to enter the front end of the needle sheath through puncture action.

Description

Technical Field

[0001] The invention relates to a thin puncture needle with a needle core whose rebound can be controlled by one hand. Background Art

[0002] In recent years, the application of fine needle aspiration under real-time ultrasound guidance for cytological biopsy has been increasing in daily medical work. This method is to obtain superficial organ tissue target cells by fine needle lifting and insertion under ultrasound monitoring, so as to perform cytopathological diagnosis. It is often used in breast, thyroid, lymph nodes, etc. It is the fastest, simplest and safest method for early diagnosis of benign and malignant targets. Compared with previous histological biopsies, it has the advantages of less damage, less risk, and equally reliable results. This involves the important tool of fine puncture needle.

[0003] In the actual puncture process, in order to ensure safety, the operating physician must hold the probe with one hand and the fine puncture needle with the other hand. The use of a fine puncture needle with a needle core can minimize the entry of tissue debris or non-target cells into the needle sheath along the puncture path, which will minimize the interference of tissue debris or non-target cells in judging the benign or malignant nature of the target. However, this operation also has certain practical application problems. When the puncture needle reaches the target, the needle core must be pulled out. If the operating physician gives up holding the puncture needle to pull out the needle core and puts the needle core in a safe place, the puncture needle will shift due to the softness and elasticity of the soft tissue, greatly increasing the risk of damaging important tissues and organs around the target. If another person helps with the operation, it is not conducive to aseptic operation, and there are also problems of cumbersome operation and difficulty in cooperation. Summary of the invention

[0004] In view of the above technical problems, the object of the present invention is to provide a thin puncture needle that is easy to operate.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fine puncture needle with a needle core rebound controlled by one hand, comprising a brake release limiter, a pressure rod, a needle core, a support spring and a needle sheath, the brake release limiter is provided with a pressure rod plug hole and a needle core plug hole, the pressure rod plug hole is communicated with the needle core plug hole, the brake release limiter is provided with a component installation space, the pressure rod is inserted into the pressure rod plug hole, the lower end of the pressure rod is provided with a limit seat, the limit seat is located in the component installation space, and the needle sheath is installed on the brake The bottom of the release limit piece, the upper end of the needle core is connected to the limit seat, the lower end of the needle core is inserted into the needle core jack and the needle sheath, the support spring is sleeved on the needle core, the upper end of the support spring abuts against the limit seat, the lower end of the support spring abuts against the brake release limit piece, a limit seat clamp is provided on the side wall of the component installation space, the limit seat clamp is matched with the limit seat, and pull rings are provided on both sides of the brake release limit piece, and the pull rings can drive the limit seat clamp on the brake release limit piece to move.

[0006] The beneficial effects of a fine puncture needle with a needle core rebound controlled by one hand provided by the present invention are as follows: since it comprises a brake release limiter, a pressure rod, a needle core, a support spring and a needle sheath, the brake release limiter is provided with a pressure rod insertion hole and a needle core insertion hole, the pressure rod insertion hole is communicated with the needle core insertion hole, the brake release limiter is provided with a component installation space, the pressure rod is inserted into the pressure rod insertion hole, a limit seat is provided at the lower end of the pressure rod, the limit seat is located in the component installation space, and the needle sheath is installed in the brake release limiter. The bottom of the component, the upper end of the needle core is connected to the limit seat, the lower end of the needle core is inserted into the needle core jack and the needle sheath, the support spring is sleeved on the needle core, the upper end of the support spring is abutted against the limit seat, the lower end of the support spring is abutted against the brake release limit member, a limit seat clamp is provided on the side wall of the component installation space, the limit seat clamp is matched with the limit seat, and pull rings are provided on both sides of the brake release limit member, and the pull ring can drive the limit seat clamp on the brake release limit member to move.

[0007] Therefore, when using it, insert the finger into the pull ring and press the pressure rod. The pressure rod moves downward to drive the limit seat to move downward, and the limit seat moves downward to drive the needle core to move downward. When the limit seat moves down and passes through the limit seat clamping head, the limit seat is clamped by the limit seat clamping head. At this time, the needle core completely fills the needle sheath. At the same time, the supporting spring is compressed by the limit seat. After puncturing to the target, pull the pull ring, the pull ring pulls the brake to release the limit piece, the brake release limit piece pulls the limit seat clamping head away from the limit seat, the limit seat clamping head releases the restriction on the limit seat, the limit seat is released, and the limit seat moves up under the action of the support spring. The upward movement of the position seat drives part of the needle core to leave the needle sheath, and the limit seat is restricted in the component installation space of the brake release limiter, so the needle core will not completely leave the needle sheath, and finally the puncture is completed, ensuring that during the puncture process, tissue cells with no diagnostic value are blocked from entering the needle sheath before reaching the target. After reaching the target, the needle core can be returned to the appropriate position through simple operation, and then the cells with diagnostic value can be allowed to enter the front end of the needle sheath through the puncture action. Due to the space vacated by the return of the needle core, the operational risk is reduced or even avoided, while the accuracy of cell extraction is improved.

[0008] Furthermore, the brake release limit member is a brake release limit frame made of elastic material, the brake release limit frame includes a brake release limit frame left rod, a brake release limit frame right rod, a brake release limit frame upper rod and a brake release limit frame lower rod, the limit seat clamp includes a limit seat left clamp and a limit seat right clamp, the pull ring includes a left pull ring and a right pull ring, the limit seat left clamp is installed on the inner side of the brake release limit frame left rod, the limit seat right clamp is installed on the inner side of the brake release limit frame right rod, and the left pull ring is installed on the brake release The release limit frame is on the outer side of the left rod, the right pull ring is installed on the outer side of the right rod of the brake release limit frame, the pressure rod socket is arranged on the upper rod of the brake release limit frame, the needle core socket is arranged on the lower rod of the brake release limit frame, and the needle sheath is installed on the bottom of the lower rod of the brake release limit frame. The beneficial effects of this design are: the overall shape is similar to a rectangular frame structure, the limit seat is more stable after being limited by the left clamping head and the right clamping head of the limit seat, and it is easier to pull the left pull ring and the right pull ring, and it is easier to release the limit seat after pulling the left pull ring and the right pull ring.

[0009] Furthermore, a left clamping head of the limit seat is provided with a left clamping head inclined surface of the limit seat, and a right clamping head of the limit seat is provided with a right clamping head inclined surface of the limit seat. The limit seat is provided with a left inclined surface of the limit seat and a right inclined surface of the limit seat. The left clamping head inclined surface of the limit seat matches with the left inclined surface of the limit seat, and the right clamping head inclined surface of the limit seat matches with the right inclined surface of the limit seat. The beneficial effect of such a design is that the limit seat can pass through the left clamping head and the right clamping head of the limit seat more easily.

[0010] Furthermore, a left inclined surface of the limit seat is provided with a left inclined surface groove of the limit seat, and a right inclined surface groove of the limit seat is provided on the right inclined surface of the limit seat. The beneficial effect of such design is that the left inclined surface groove of the limit seat and the right inclined surface groove of the limit seat have a guiding function, making it easier for the limit seat to pass through the left clamping head and the right clamping head of the limit seat, and the left rod of the brake release limit frame and the right rod of the brake release limit frame can be respectively inserted into the left inclined surface groove of the limit seat and the right inclined surface groove of the limit seat, so that when the limit seat moves down, it is more stable and will not shake left and right.

[0011] Furthermore, the top of the limit seat is provided with a left groove at the top of the limit seat and a right groove at the top of the limit seat. The beneficial effect of this design is that when the limit seat passes through the left clamping head of the limit seat and the right clamping head of the limit seat, the left clamping head of the limit seat and the right clamping head of the limit seat are respectively clamped into the left groove at the top of the limit seat and the right groove at the top of the limit seat, so that the limit seat is more stable after being limited.

[0012] Furthermore, a curved pressure rod is provided on the top of the pressure rod. The beneficial effect of such a design is that it makes the hand feel more comfortable when pressing the pressure rod.

[0013] Furthermore, the pull ring is mounted on the brake release limiter by means of screws, and the needle sheath is mounted on the bottom of the brake release limiter by means of threaded engagement. Such a design has the beneficial effects of simple structure and lower manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 One of the structural diagrams of a thin puncture needle with a needle core that can be controlled to rebound by one hand provided by the present invention;

[0015] Figure 2 The second structural diagram of a thin puncture needle with a needle core that can be controlled to rebound by one hand provided by the present invention;

[0016] Figure 3 A cross-sectional structural diagram of a thin puncture needle with a needle core that can be controlled to rebound by one hand provided by the present invention;

[0017] Figure 4 One of the structural diagrams of a thin puncture needle provided by the present invention that controls the needle core rebound with one hand, in which a limit seat is clamped on a limit seat clamping head;

[0018] Figure 5 The second structural diagram of a thin puncture needle with a single-handed control of the needle core rebound provided by the present invention, in which a limit seat is clamped on a limit seat clamping head;

[0019] Figure 6 The third structural diagram of a thin puncture needle with a single-handed control of the needle core rebound provided by the present invention, in which a limit seat is clamped on a limit seat clamping head;

[0020] Figure 7 A cross-sectional structural diagram of a limit seat of a fine puncture needle with a needle core that can be controlled to rebound by one hand provided by the present invention being clamped on a limit seat clamping head. DETAILED DESCRIPTION

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, an embodiment of a fine puncture needle with one-hand controlled needle core rebound provided by the present invention includes a brake release limiter 1, a pressure rod 2, a needle core 3, a support spring 4 and a needle sheath 5, the brake release limiter 1 is provided with a pressure rod insertion hole 2-1 and a needle core insertion hole 3-1, the pressure rod insertion hole 2-1 is communicated with the needle core insertion hole 3-1, the brake release limiter 1 is provided with a component installation space 6, the pressure rod 2 is inserted into the pressure rod insertion hole 2-1, the lower end of the pressure rod 2 is provided with a limiting seat 7, the limiting seat 7 is located in the component installation space 6, the needle sheath 5 is installed at the bottom of the brake release limiter 1, the upper end of the needle core 3 is connected to the limiting seat 7, the lower end of the needle core 3 is inserted into the needle core insertion hole 3-1 and the needle sheath 5, the The support spring 4 is sleeved on the needle core 3, the upper end of the support spring 4 abuts against the limit seat 7, and the lower end of the support spring 4 abuts against the brake release limit member 1. A limit seat clamp 8 is provided on the side wall of the component installation space 6, and the limit seat clamp 8 cooperates with the limit seat 7. Pull rings 9 are provided on both sides of the brake release limit member 1, and the pull ring 9 can drive the limit seat clamp 8 on the brake release limit member 1 to move, wherein the brake release limit member 1 and the pull ring 9 can be integrally formed, and the pull ring 9 can also be installed on the brake release limit member 1 by screws, the pressure rod 2 and the limit seat 7 can be integrally formed, and the limit seat 7 can also be installed on the pressure rod 2 by screws, and the needle core 3 is installed on the limit seat 7 by hot melting.

[0022] The brake release limit member 1 is a brake release limit frame 1-1 made of elastic material, the brake release limit frame 1-1 includes a brake release limit frame left rod 1-2, a brake release limit frame right rod 1-3, a brake release limit frame upper rod 1-4 and a brake release limit frame lower rod 1-5, the limit seat clamp 8 includes a limit seat left clamp 8-1 and a limit seat right clamp 8-2, the pull ring 9 includes a left pull ring 9-1 and a right pull ring 9-2, the limit seat left clamp 8-1 is installed on the inner side of the brake release limit frame left rod 1-2, and the limit seat right clamp 8-2 is installed on the inner side of the brake release limit frame left rod 1-2. The left pull ring 9-1 is installed on the inner side of the right rod 1-3 of the brake release limit frame, the right pull ring 9-2 is installed on the outer side of the right rod 1-3 of the brake release limit frame, the pressure rod socket 2-1 is arranged on the upper rod 1-4 of the brake release limit frame, the needle core socket 3-1 is arranged on the lower rod 1-5 of the brake release limit frame, and the needle sheath 5 is installed on the bottom of the lower rod 1-5 of the brake release limit frame, that is, the brake release limit frame 1-1 is a frame body, and the component installation space 6 is the space inside the frame body of the brake release limit frame 1-1.

[0023] The left clamp head 8-1 of the limit seat is provided with a left clamp head inclined surface 8-11, the right clamp head 8-2 of the limit seat is provided with a right clamp head inclined surface 8-21, the limit seat 7 is provided with a left inclined surface 7-1 and a right inclined surface 7-2, the left clamp head inclined surface 8-11 of the limit seat matches with the left inclined surface 7-1 of the limit seat, the right clamp head inclined surface 8-21 of the limit seat matches with the right inclined surface 7-2 of the limit seat, the left inclined surface 7-1 of the limit seat is provided with a left inclined surface groove 7-11 of the limit seat, the right inclined surface 7-2 of the limit seat is provided with a right inclined surface groove 7-21 of the limit seat, the top of the limit seat 7 is provided with a left groove 7-3 at the top of the limit seat and a right groove 7-4 at the top of the limit seat,

[0024] An arc-shaped pressure rod 2-2 is provided at the top of the pressure rod 2, the pull ring 9 is installed on the brake release limiter 1 by means of screws, and the needle sheath 5 is installed at the bottom of the brake release limiter 1 by means of threaded cooperation, that is, an internally threaded nut is provided on the needle sheath 5, and an externally threaded structure is provided at the bottom of the brake release limiter 1 to cooperate with the nut on the needle sheath 5.

[0025] The left inclined groove 7-11 of the limiting seat is larger at the bottom and smaller at the top, and the right inclined groove 7-21 of the limiting seat is larger at the bottom and smaller at the top. In this way, the left clamping head 8-1 of the limiting seat is easier to enter the left inclined groove 7-11 of the limiting seat, and the right clamping head 8-2 of the limiting seat is easier to enter the right inclined groove 7-21 of the limiting seat. The brake release limit frame 1-1 is a plastic frame with elasticity.

[0026] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The drawings are not necessarily drawn to scale. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but only as a representative basis to teach those skilled in the art to adopt and implement the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

Claims

1. A thin puncture needle with a needle core that can be rebounded by one hand, characterized in that: The invention comprises a brake release limiter (1), a pressure rod (2), a needle core (3), a support spring (4) and a needle sheath (5), wherein the brake release limiter (1) is provided with a pressure rod insertion hole (2-1) and a needle core insertion hole (3-1), wherein the pressure rod insertion hole (2-1) is communicated with the needle core insertion hole (3-1), the brake release limiter (1) is provided with a component installation space (6), the pressure rod (2) is inserted into the pressure rod insertion hole (2-1), a limit seat (7) is provided at the lower end of the pressure rod (2), and the limit seat (7) is located in the component installation space (6), the needle sheath (5) is installed at the bottom of the brake release limiter (1), the upper end of the needle core (3) is connected to the limit seat (7), and the needle core ( The lower end of the support spring (4) is inserted into the needle core jack (3-1) and the needle sheath (5), the support spring (4) is sleeved on the needle core (3), the upper end of the support spring (4) is in contact with the limit seat (7), the lower end of the support spring (4) is in contact with the brake release limit member (1), a limit seat clamp (8) is provided on the side wall of the component installation space (6), the limit seat clamp (8) is matched with the limit seat (7), pull rings (9) are provided on both sides of the brake release limit member (1), the pull ring (9) can drive the limit seat clamp (8) on the brake release limit member (1) to move, the limit member (1) and the pull ring (9) are integrally formed, and the pressure rod (2) and the limit seat (7) are integrally formed. The brake release limit member (1) is a brake release limit frame (1-1) made of elastic material. The brake release limit frame (1-1) comprises a brake release limit frame left rod (1-2), a brake release limit frame right rod (1-3), a brake release limit frame upper rod (1-4) and a brake release limit frame lower rod (1-5). The limit seat clamp (8) comprises a limit seat left clamp (8-1) and a limit seat right clamp (8-2). The pull ring (9) comprises a left pull ring (9-1) and a right pull ring (9-2). The limit seat left clamp (8-1) is installed on the brake release limit frame left rod. The right clamping head (8-2) of the limit seat is installed on the inner side of the right rod (1-3) of the brake release limit frame, the left pull ring (9-1) is installed on the outer side of the left rod (1-2) of the brake release limit frame, the right pull ring (9-2) is installed on the outer side of the right rod (1-3) of the brake release limit frame, the pressure rod plug hole (2-1) is arranged on the upper rod (1-4) of the brake release limit frame, the needle core plug hole (3-1) is arranged on the lower rod (1-5) of the brake release limit frame, and the needle sheath (5) is installed at the bottom of the lower rod (1-5) of the brake release limit frame. The left clamping head (8-1) of the limit seat is provided with a left clamping head inclined surface (8-11), the right clamping head (8-2) of the limit seat is provided with a right clamping head inclined surface (8-21), the limit seat (7) is provided with a left clamping head inclined surface (7-1) and a right clamping head inclined surface (7-2), the left clamping head inclined surface (8-11) of the limit seat matches with the left clamping head inclined surface (7-1) of the limit seat, and the right clamping head inclined surface (8-21) of the limit seat matches with the right clamping head inclined surface (7-2) of the limit seat.

2. A thin puncture needle with single-handed control of needle core rebound according to claim 1, characterized in that: A left inclined surface of the limiting seat (7-1) is provided with a left inclined surface groove (7-11), and a right inclined surface groove (7-21) is provided with a right inclined surface groove (7-21) of the limiting seat on the left inclined surface (7-1).

3. A thin puncture needle with single-handed control of needle core rebound according to claim 2, characterized in that: The top of the limiting seat (7) is provided with a left groove (7-3) at the top of the limiting seat and a right groove (7-4) at the top of the limiting seat.

4. A thin puncture needle with single-handed control of needle core rebound according to claim 3, characterized in that: The top of the pressure rod (2) is provided with an arc-shaped pressure rod (2-2).

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