Needle head for automatic puncture needle

Abstract

The utility model relates to the technical field of puncture equipment, in particular to a needle head for an automatic puncture needle, which comprises a needle head main body, the upper end of the needle head main body is used for being connected with the puncture needle main body, and the puncture needle main body is used for applying negative pressure to an inner cavity of the needle head main body and driving the needle head main body to rotate. A connector integrally formed with the needle sleeve is arranged at the upper end of the needle sleeve, the connector is detachably connected with the needle head main body, the needle head main body comprises a hollow needle body and a solid needle tip, a cutting edge communicated with an inner cavity of the needle body is arranged on the side wall of the lower end of the needle body, an opening matched with the cutting edge is formed in the side wall of the needle sleeve, and the needle tip is detachably connected with the needle head main body. And the lower end of the needle tip protrudes out of the needle sleeve. Through the arrangement of the needle sleeve, a shearing effect can be formed between the needle sleeve and the cutting edge, the situation that cell tissue cut by the cutting edge cannot be separated is avoided, follow-up pathological tissue collection is facilitated, the needle sleeve can be used as a drainage tube, follow-up treatment is facilitated, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of puncture equipment, in particular to a needle head for an automatic puncture needle. Background Art

[0002] Fine needle puncture is commonly used now, that is, using an injection needle to pierce the lesion tumor, and using negative pressure and multiple punctures to extract the lesion tissue. The existing patent with publication number CN220344463U discloses an automatic puncture needle, including a needle and a puncture needle body. The puncture needle body can apply negative pressure to the inner cavity of the needle and can drive the needle to rotate. The side wall of the lower end of the needle is provided with a cutting edge connected to its inner cavity, so that the cell tissue can be cut and sucked into the puncture needle body by negative pressure. However, it has the following defects:

[0003] After the blade cuts and extracts the tissue, the cut tissue is not easy to separate, but is in long strips, which is not conducive to the subsequent collection of pathological tissue; after fine needle puncture, the wound is pressed and sealed. When encountering a patient with inflammation who needs drainage, only a one-time extraction can be performed, and drainage cannot be performed. Medication and interventional treatment are also not possible; when the needle is pulled out, due to the negative pressure, normal tissue is easily accidentally sucked into the needle and scratched by the blade during the pulling process. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a needle head for an automatic puncture needle.

[0005] The utility model provides the following technical solution: a needle for an automatic puncture needle, comprising a needle body, the upper end of the needle body being used to connect with the puncture needle body, the puncture needle body being used to apply negative pressure to the inner cavity of the needle body and drive the needle body to rotate, the needle body being provided with a needle sleeve, the upper end of the needle sleeve being provided with a connector integrally formed with the needle sleeve, the connector being detachably connected to the needle body, the needle body comprising a hollow needle body and a solid needle tip, a cutting edge communicating with the inner cavity of the needle body being provided on the side wall at the lower end of the needle body, an opening matching the cutting edge being provided on the side wall of the needle sleeve, and the lower end of the needle tip protruding from the needle sleeve.

[0006] The needle tip of a needle for an automatic puncture needle according to an embodiment of the present utility model is provided with a needle sleeve, and the lower end of the needle tip protrudes from the needle sleeve, facilitating the needle sleeve to achieve tissue puncture along with the needle body. Moreover, the needle sleeve is detachably and fixedly connected to the needle body, enabling the needle sleeve to rotate synchronously with the needle body. By providing an opening on the side wall of the needle sleeve, it does not affect the cutting of cell tissue by the cutting edge, and the opening of the needle sleeve can form a shearing effect with the cutting edge, preventing the cell tissue cut by the cutting edge from being unable to be severed, facilitating the subsequent collection of pathological tissues. After the extraction of cell tissue is completed, by disconnecting the connection between the needle sleeve and the needle body, the needle sleeve can be left in the patient's body and used as a drainage tube, facilitating subsequent treatment, and having strong practicability.

[0007] Further, the connection head is threadedly connected to the upper side wall of the needle body, and when the thread between the connection head and the needle body is separated, the cutting edge and the opening are mutually misaligned.

[0008] Further, the connection head includes a threaded portion and an adapter portion. The threaded portion is a hollow cylindrical structure with internal threads provided on its inner wall, and the adapter portion is an inverted hollow frustoconical structure. The lower end of the adapter portion is integrally formed and connected to the needle sleeve.

[0009] Further, a plurality of anti-slip vertical lines are provided on the outer wall of the threaded portion.

[0010] Further, the upper end diameter of the needle tip is smaller than the outer diameter of the needle body. A limiting ring is provided at the end of the needle sleeve, and the inner diameter of the limiting ring is equal to the upper end diameter of the needle tip. The lower end of the needle body is a closed structure, and the upper end surface of the limiting ring abuts against the lower end surface of the needle body.

[0011] Further, the needle tip includes an upper part and a lower part. The upper part is a cylindrical structure, and the lower part is an inverted conical structure. The limiting ring is an inverted frustoconical structure, and the outer wall of the limiting ring is smoothly connected to the outer wall of the lower part.

[0012] Further, the apex angle of the lower part is between 30° and 45°.

[0013] Further, the needle sleeve is made of silicone rubber or polyurethane. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1It is a schematic diagram of the structure of the needle head used for the automatic puncture needle of the utility model;

[0016] Figure 2 for Figure 1 A magnified schematic diagram of the local A in the middle;

[0017] Figure 3 for Figure 1 A magnified schematic diagram of the part B in the middle;

[0018] Figure 4 This is a schematic diagram of the internal structure of the needle head used for the automatic puncture needle of the utility model;

[0019] Figure 5 for Figure 4 A magnified schematic diagram of the local C in the middle;

[0020] Figure 6 It is a structural schematic diagram of the needle body of the needle used for the automatic puncture needle of the utility model.

[0021] Description of reference numerals:

[0022] 1. Puncture needle body; 10. Needle body; 11. Needle body; 111. Blade edge; 12. Needle tip; 121. Upper part; 122. Lower part; 20. Needle sleeve; 21. Connector; 211. Threaded part; 212. Connecting part; 213. Anti-slip vertical lines; 22. Opening; 23. Limiting ring. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0026] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0027] Referring to Figures 1 to 6 , in an embodiment of the present utility model, a needle head for an automatic puncture needle includes a needle head body 10. The upper end of the needle head body 10 is used to be connected to a puncture needle body 1. The puncture needle body 1 is used to apply negative pressure to the inner cavity of the needle head body 10 and drive the needle head body 10 to rotate. A needle sleeve 20 is provided on the needle head body 10. A connection head 21 integrally formed with the needle sleeve 20 is provided at the upper end of the needle sleeve 20. The connection head 21 is detachably and fixedly connected to the needle head body 10. The needle head body 10 includes a hollow needle body 11 and a solid needle tip 12. A cutting edge 111 communicating with the inner cavity of the needle body 11 is provided on the side wall of the lower end of the needle body 11. An opening 22 adapted to the cutting edge 111 is provided on the side wall of the needle sleeve 20. The lower end of the needle tip 12 protrudes from the needle sleeve 20.

[0028] In this embodiment, the structure and principle that the puncture needle body 1 can apply negative pressure to the inner cavity of the needle head body 10 and drive the needle head body 10 to rotate are well known to those skilled in the art, so no further details will be provided here.

[0029] The needle for the automatic puncture needle of an embodiment of the utility model is provided with a needle cover 20, and the lower end of the needle tip 12 protrudes from the needle cover 20, so that the needle cover 20 can achieve tissue puncture along with the needle body 10, and the needle cover 20 is detachably fixedly connected to the needle body 10, so that the needle cover 20 can rotate synchronously with the needle body 10, and an opening 22 is provided on the side wall of the needle cover 20, so as not to affect the cutting of cell tissue by the cutting edge 111, and the opening 22 of the needle cover 20 can form a shearing effect with the cutting edge 111, so as to avoid that the cell tissue cut by the cutting edge 111 cannot be separated, which is convenient for subsequent pathological diagnosis, and after the extraction of cell tissue is completed, the needle cover 20 can be left in the patient's body by disconnecting the connection between the needle cover 20 and the needle body 10, and used as a drainage tube, which is convenient for subsequent treatment and has strong practicality.

[0030] The connector 21 is threadedly connected to the upper side wall of the needle body 11, and when the threads of the connector 21 and the needle body 11 are separated, that is, when the threads of the two are disconnected, the cutting edge 111 and the opening 22 are misaligned with each other; the connector 21 includes a threaded portion 211 and a connecting portion 212, the threaded portion 211 is a hollow cylindrical structure, and its inner wall is provided with threads, the connecting portion 212 is an inverted hollow truncated cone structure, and the lower end of the connecting portion 212 is integrally connected with the needle sleeve 20; a plurality of anti-slip vertical lines 213 are provided on the outer wall of the threaded portion 211.

[0031] The connector 21 and the needle body 11 are connected by threads, which is convenient for disassembly and assembly, and ensures that the needle sleeve 20 can rotate synchronously with the needle body 10; the inner wall of the threaded portion 211 is provided with threads, and the upper side wall of the needle body 11 is provided with corresponding threads. In specific implementation, it should be avoided that the threads are too long to affect disassembly and assembly; the connecting portion 212 can better transmit the force brought by the threaded portion 211 to the needle sleeve 20, avoid the distortion of the needle sleeve 20, and ensure that the needle sleeve 20 can stably rotate synchronously with the needle body 10; the anti-slip vertical lines 213 can enhance the friction force, making it easier for medical staff to disassemble and assemble the needle sleeve 20; in this embodiment, when installing the needle sleeve 20, first remove the needle body 10 from the top, and then remove it. Insert the needle sleeve 20 downward, and then tighten the connector 21 and the needle body 11, so that the needle tip 12 protrudes from the needle sleeve 20, and at this time, the cutting edge 111 on the needle body 11 corresponds to the opening 22 on the needle sleeve 20; when removing the needle sleeve 20, hold the connector 21 and rotate the puncture needle body 1, thereby rotating the needle body 10, so that the connector 21 and the needle body 11 are loosened and disconnected, and the cutting edge 111 and the opening 22 are completely misaligned, and then the needle body 10 is pulled out of the patient's body, which can avoid the situation where normal tissue is accidentally sucked into the needle body 11 and scratched by the blade during the pulling process due to negative pressure, thereby ensuring the safety of the needle body 10.

[0032] The upper end diameter of the needle tip 12 is smaller than the outer diameter of the needle body 11. A limiting ring 23 is provided at the end of the needle sleeve 20. The inner diameter of the limiting ring 23 is equal to the upper end diameter of the needle tip 12. The lower end of the needle body 11 is a closed structure. The upper end surface of the limiting ring 23 abuts against the lower end surface of the needle body 11. The limiting ring 23 can limit the downward movement of the needle body 11. When the lower end surface of the needle body 11 abuts against the upper end surface of the limiting ring 23, the connector 21 and the needle body 11 are in a fully tightened state, which can increase the friction between the connector and the needle body, thereby clamping the needle sleeve 20 on the needle body 11, preventing the needle sleeve from deforming and twisting, and ensuring that the needle sleeve 20 can stably rotate synchronously with the needle head main body 10.

[0033] The needle tip 12 includes an upper part 121 and a lower part 122. The upper part 121 is a cylindrical structure, and the lower part 122 is an inverted conical structure. The limiting ring 23 is an inverted frustum of a cone structure, and the outer wall of the limiting ring 23 is smoothly connected to the outer wall of the lower part 122. The apex angle of the lower part 122 is between 30° and 45°. The needle tip 12 and the limiting ring 23 cooperate with each other so that after the connector 21 and the needle body 11 are tightened, the limiting ring 23 and the needle tip 12 can form an inverted conical structure, and the needle sleeve 20 can smoothly insert into the human tissue along with the needle tip 12 without scratching the cell tissue. The apex angle of the lower part 122 is relatively small. If it is too large, it is not easy to puncture the human tissue. In this embodiment, the apex angle of the lower part 122 is 42°.

[0034] The needle sleeve 20 is made of silicone rubber or polyurethane. Both silicone rubber and polyurethane are flexible materials and can be better retained in the patient's body, enabling the needle sleeve 20 to be used as a drainage tube. Specifically, during use, only an external catheter needs to be hermetically connected to the connector 21. In practice, the needle sleeve 20 can also be made of materials such as polyethylene and polypropylene, and is not limited thereto.

[0035] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A needle for an automatic puncture needle, comprising a needle body, the upper end of which is used to connect with a puncture needle body, the puncture needle body is used to apply negative pressure to the inner cavity of the needle body and drive the needle body to rotate, characterized in that: The needle body is provided with a needle sleeve, and the upper end of the needle sleeve is provided with a connector integrally formed with the needle sleeve, and the connector is detachably connected to the needle body. The needle body comprises a hollow needle body and a solid needle tip, and the lower end side wall of the needle body is provided with a cutting edge connected to the inner cavity of the needle body, and the side wall of the needle sleeve is provided with an opening matched with the cutting edge, and the lower end of the needle tip protrudes from the needle sleeve.

2. The needle head for automatic puncture needle according to claim 1, characterized in that: The connector is threadedly connected to the upper side wall of the needle body, and when the threads of the connector and the needle body are separated, the cutting edge and the opening are misaligned with each other.

3. The needle head for automatic puncture needle according to claim 1, characterized in that: The connector includes a threaded portion and a connecting portion. The threaded portion is a hollow cylindrical structure with threads on its inner wall. The connecting portion is an inverted hollow truncated cone structure. The lower end of the connecting portion is integrally connected to the needle sleeve.

4. The needle head for automatic puncture needle according to claim 3, characterized in that: A plurality of anti-slip vertical lines are arranged on the outer wall of the threaded portion.

5. The needle head for automatic puncture needle according to claim 1, characterized in that: The upper end diameter of the needle tip is smaller than the outer diameter of the needle body. A limiting ring is provided at the end of the needle sleeve. The inner diameter of the limiting ring is equal to the upper end diameter of the needle tip. The lower end of the needle body is a closed structure. The upper end surface of the limiting ring abuts against the lower end surface of the needle body.

6. The needle head for automatic puncture needle according to claim 5, characterized in that: The needle tip includes an upper part and a lower part, the upper part is a cylindrical structure, the lower part is an inverted cone structure, the limiting ring is an inverted truncated cone structure, and the outer wall of the limiting ring is smoothly connected to the outer wall of the lower part.

7. The needle head for automatic puncture needle according to claim 6, characterized in that: The top angle of the lower portion is between 30° and 45°.

8. The needle head for automatic puncture needle according to claim 1, characterized in that: The needle sleeve is made of silicone rubber or polyurethane.

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