A puncture needle under ultrasonic guidance

Abstract

The present invention discloses a puncture needle under ultrasonic guidance, belonging to the technical field of medical devices. It includes: a needle handle; a needle body connector disposed at one end of the needle handle; a needle body puncture mechanism disposed at the end of the needle body connector away from the needle handle and passing through the needle handle and the needle body connector; by means of the outer needle body assembly cooperating with the inner needle puncture assembly, it is convenient to observe the inner needle puncture assembly operating inside the outer needle body assembly, so that under ultrasonic guidance, the inner needle puncture assembly moves more accurately, and the puncture needle can also play an auxiliary guiding role for the inner needle puncture assembly during use, enabling the puncture needle to move more accurately to the treatment area of the patient during use, achieving a more accurate effect of cooperating with ultrasonic-guided displacement; it solves the problem that during the use of the traditional block puncture needle, the needle body will block the ultrasonic image of the needle core, resulting in inaccurate specific position of the movement of the needle core.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a puncture needle under ultrasonic guidance. Background Art

[0002] A puncture needle is a medical tool, and its main function is to penetrate the skin or other tissues during medical operations for various diagnostic or treatment activities. The ultrasonic-guided puncture needle has a wide range of applications in the medical field. It combines ultrasonic imaging technology and puncture technology to achieve precise sampling or treatment of target tissues. There are various types and specifications of ultrasonic-guided puncture needles to meet the needs of different parts and different lesions. Common types include fine needle biopsy needles, cutting biopsy needles, negative pressure aspiration biopsy guns, etc. In terms of specifications, the diameter, length of the puncture needle, and the design of the cutting edge, etc. will all affect the puncture effect and safety;

[0003] After retrieval, a utility model patent with the publication number CN219354097U discloses a puncture needle for ultrasonic-guided transforaminal nerve block. This block puncture needle changes the bevel-shaped needle tip to a conical shape to reduce damage to the nerves and blood vessels around the intervertebral foramen, and sets an ultrasonic image enhancement area near the needle tip to improve the clarity of ultrasonic imaging. However, during the use of this block puncture needle, the needle body will block the ultrasonic image of the needle core, resulting in inaccurate specific position of the needle core movement.

[0004] Based on this, the present invention proposes a puncture needle under ultrasonic guidance to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] In view of this, the main purpose of the present invention is to provide a puncture needle under ultrasonic guidance to solve the problem that during the use of a traditional block puncture needle, the needle body blocks the ultrasonic image of the needle core, resulting in inaccurate specific position of the needle core movement.

[0006] The technical solution of the present invention is implemented as follows:

[0007] A puncture needle under ultrasonic guidance includes:

[0008] A needle handle;

[0009] A needle body connector, provided at one end of the needle handle;

[0010] A needle body puncture mechanism, provided at the end of the needle body connector away from the needle handle and passing through the needle handle and the needle body connector, includes:

[0011] An outer needle body assembly, provided at the end of the needle body connector away from the needle handle, and a puncture organ assembly is provided at the end of the outer needle body assembly away from the needle body connector;

[0012] The inner needle puncture assembly is movably arranged inside the outer needle body assembly. One end of the inner needle puncture assembly penetrates through the outer needle body assembly and extends to the outside of the outer needle body assembly, and the other end penetrates through the puncture organ assembly and extends to the outside of the puncture organ assembly, and is matched with the puncture organ assembly.

[0013] In a preferred embodiment, the outer needle body assembly includes a plastic needle body arranged at the end of the needle body connector away from the needle handle. A first guiding chamber is formed in the plastic needle body. Two guiding grooves communicating with the first guiding chamber are also formed in the plastic needle body. A plurality of metal reflecting strips are embedded in the plastic needle body. The end of the plastic needle body close to the needle body connector is provided with a second end port connected to the needle body connector, and the end of the plastic needle body close to the puncture organ assembly is provided with a first end port.

[0014] In a preferred embodiment, the guiding grooves are spiral, and the two guiding grooves are symmetrically distributed about the axis of the plastic needle body. The depth of the guiding groove gradually decreases from the first end port to the second end port until it coincides with the first guiding chamber.

[0015] In a preferred embodiment, a plurality of the metal reflecting strips are evenly distributed in a ring shape on the surface of the plastic needle body, and two metal spiral rings are embedded on the surfaces of the plurality of metal reflecting strips.

[0016] In a preferred embodiment, the surface width of the metal reflecting strip near the adjacent metal spiral ring is greater than the surface width of the metal reflecting strip near the plastic needle body.

[0017] In a preferred embodiment, the metal spiral ring is spiral on the surface of the plastic needle body, and the spiral direction of the metal spiral ring is opposite to that of the guiding groove.

[0018] In a preferred embodiment, a first edge chamfer is arranged on one side of the edge of the inner wall of the guiding groove, and the first edge chamfer is arc-shaped.

[0019] In a preferred embodiment, the first guiding chamber communicates with the second end port and the first end port. The second end port is oval, and the first end port is circular.

[0020] In a preferred embodiment, the puncture organ assembly includes a metal connector arranged at one end of the plastic needle body away from the needle body connector. A second guiding chamber is formed in the metal connector. An annular groove is formed at the end of the metal connector close to the plastic needle body. The annular groove communicates with the guiding groove, and an annular airbag is connected to the inner wall of the annular groove. A metal puncturing head is arranged at the end of the metal connector away from the plastic needle body.

[0021] In a preferred embodiment, the inner needle puncture assembly includes an inner needle core rubber head slidably connected in the second guiding chamber. An inner metal needle core is provided at one end of the inner needle core rubber head away from the metal puncturing head. The other end of the inner metal needle core penetrates outside the needle handle. Guide strips are provided on the surface of the inner needle core rubber head. A second edge chamfer is provided on the surface of the guide strip away from the inner needle core rubber head, and the second edge chamfer is arc-shaped.

[0022] Compared with the prior art, the present invention provides a puncture needle under ultrasonic guidance, which has the following beneficial effects:

[0023] 1. Through the setting of the outer needle body assembly cooperating with the inner needle puncture assembly, the outer needle body assembly cooperating with the inner needle puncture assembly can make it convenient to observe the inner needle puncture assembly operating inside the outer needle body assembly during the use of the puncture needle, so that under ultrasonic guidance, the inner needle puncture assembly moves more accurately. And during the use of the puncture needle, it can also play an auxiliary guiding role for the inner needle puncture assembly, so that the puncture needle can move more accurately to the treatment area of the patient during use, achieving a more accurate effect of cooperating with ultrasonic-guided displacement;

[0024] 2. Through the setting of the puncture organ assembly and the inner needle puncture assembly, through the cooperation of the puncture organ assembly and the inner needle puncture assembly, the present puncture needle can puncture the patient's organ through the puncture organ assembly and insert the outer needle body assembly into the patient's body for treatment. And when the end of the inner needle puncture assembly moves to the area where the patient needs treatment, at this time, the inner needle puncture assembly will be guided by the outer needle body assembly to fit with the puncture organ assembly, reducing the puncture organ assembly from puncturing other organs, and the puncture organ assembly can form a clamp on the inner needle puncture assembly to assist the inner needle puncture assembly in positioning; it solves the problem that the needle body blocks the ultrasonic image of the needle core during the use of the traditional block puncture needle, resulting in inaccurate specific position of the movement of the needle core. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained as these drawings.

[0026] Figure 1 It is a schematic structural diagram of the puncture needle under ultrasonic guidance of the present invention;

[0027] Figure 2 It is a partial structural diagram of the needle body puncture mechanism of the present invention;

[0028] Figure 3 Schematic diagram of the structure of the second end port of the present invention;

[0029] Figure 4 Schematic diagram of the connection between the plastic needle body and the metal connector of the present invention;

[0030] Figure 5 Schematic diagram of the internal structure of the plastic needle body of the present invention;

[0031] Figure 6 Schematic diagram of the structure of the first edge chamfer of the present invention;

[0032] Figure 7 Schematic diagram of the structure of the guiding groove body of the present invention;

[0033] Figure 8 Partial exploded structural cross-sectional view of the needle body puncture mechanism of the present invention;

[0034] Figure 9 Exploded cross-sectional view of the puncture organ assembly of the present invention;

[0035] Figure 10 Partial structural schematic diagram of the inner needle puncture assembly of the present invention;

[0036] Figure 11 For the present invention Figure 1 Local enlarged view at position A in;

[0037] Figure 12 Connection effect diagram of the metal spiral coil and the metal reflective strip of the present invention.

[0038]

Description of main component symbols

[0039] 100, needle handle;

[0040] 200, needle body connector;

[0041] 300, needle body puncture mechanism; 310, outer needle body assembly; 311, plastic needle body; 312, guiding groove body; 3121, first edge chamfer; 313, first guiding chamber; 3131, first end port; 3132, second end port; 314, metal spiral coil; 315, metal reflective strip; 320, puncture organ assembly; 321, metal connector; 322, metal puncturing head; 323, second guiding chamber; 324, annular groove body; 325, annular airbag; 330, inner needle puncture assembly; 331, internal needle core rubber head; 332, guiding strip; 333, second edge chamfer; 334, internal metal needle core. Detailed implementation manners

[0042] The following further describes in detail the structure of the present ultrasound-guided puncture needle in conjunction with the accompanying drawings and embodiments of the present invention.

[0043] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments such as those of this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0046] For the sake of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here will be made.

[0047] Next, in combination with Figures 1 - 12 describe the puncture needle under ultrasonic guidance of the present invention.

[0048] Embodiment 1:

[0049] Such as Figure 1 andFigure 2 As shown in Figure 2 , in one embodiment, an ultrasound-guided puncture needle includes a needle handle 100. One end of the needle handle 100 is fixedly connected to a needle body connector 200, and the needle body connector 200 communicates with the end of the needle handle 100. And at one end of the needle body connector 200 away from the needle handle 100, a needle body puncture mechanism 300 is fixedly connected. The needle body puncture mechanism 300 penetrates through the needle body connector 200 and extends to the outside of the needle handle 100 away from the needle body connector 200.

[0050] Specifically, the needle body puncture mechanism 300 includes an outer needle body assembly 310 installed at one end of the needle body connector 200 away from the needle handle 100. The end of the outer needle body assembly 310 away from the needle body connector 200 is connected to a puncture organ assembly 320. An inner needle puncture assembly 330 is installed inside the puncture organ assembly 320. One end of the inner needle puncture assembly 330 extends to the outside of the puncture organ assembly 320, and the other end of the inner needle puncture assembly 330 extends to the outside of the needle handle 100 away from the needle body connector 200.

[0051] It should be noted that in this embodiment, through the settings of the above-mentioned needle handle 100, needle body connector 200, and needle body puncture mechanism 300, a puncture needle capable of performing puncture and biopsy sampling under ultrasound guidance is formed. At the same time, through the settings of the outer needle body assembly 310, puncture organ assembly 320, and inner needle puncture assembly 330, during use, the outer needle body assembly 310 can cooperate with the inner needle puncture assembly 330 to conveniently observe the inner needle puncture assembly 330 operating inside the outer needle body assembly 310, so that under ultrasonic guidance, the inner needle puncture assembly 330 moves more accurately. And during the use of this puncture needle, it can also play an auxiliary guiding role for the inner needle puncture assembly 330, so that this puncture needle can move more accurately to the treatment area of the patient during use, achieving a more accurate effect of cooperating with ultrasonic-guided displacement. Through the cooperation of the puncture organ assembly 320 and the inner needle puncture assembly 330, this puncture needle can pierce the patient's organ through the puncture organ assembly 320 and insert the outer needle body assembly 310 into the patient's body for treatment. And when the end of the inner needle puncture assembly 330 moves to the area where the patient needs treatment, at this time, the inner needle puncture assembly 330 will be guided by the outer needle body assembly 310 to fit with the puncture organ assembly 320, avoiding the puncture organ assembly 320 from piercing other organs, and the puncture organ assembly 320 can form a clamp on the inner needle puncture assembly 330 to assist the inner needle puncture assembly 330 in positioning. It solves the problem that the needle body blocks the ultrasonic image of the needle core during the use of the traditional block puncture needle, resulting in inaccurate specific position of the needle core movement.

[0052] Embodiment 2:

[0053] Different from the above-mentioned Embodiment 1, as shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 12 , the outer needle body assembly 310 includes a plastic needle body 311 fixedly connected to the end of the needle body connector 200 away from the needle handle 100. A first guiding chamber 313 for guiding and moving the inner needle puncturing assembly 330 is provided inside the plastic needle body 311. Two guiding grooves 312 are also provided inside the plastic needle body 311 for cooperating with the inner needle puncturing assembly 330. The guiding grooves 312 communicate with the first guiding chamber 313. A plurality of metal reflection strips 315 are embedded and installed inside the plastic needle body 311. The end of the plastic needle body 311 near the needle body connector 200 is also provided with a second end port 3132 for connecting with the needle body connector 200, and a first end port 3131 is provided at the end of the plastic needle body 311 near the puncturing organ assembly 320 for connecting with the puncturing organ assembly 320.

[0054] The guiding grooves 312 are arranged in a spiral shape. The two guiding grooves 312 are symmetrically distributed along the axis of the plastic needle body 311, and the depth of the guiding grooves 312 gradually decreases from the first end port 3131 to the second end port 3132 until it coincides with the first guiding chamber 313; it is used to cooperate with the guiding strips 332 on the outer side of the internal metal needle core 334 through the guiding grooves 312 to guide the installation of the internal metal needle core 334.

[0055] The plurality of metal reflection strips 315 are evenly distributed in a ring along the surface of the plastic needle body 311. Two metal spiral rings 314 are embedded on the surface of the plurality of metal reflection strips 315. The surface width of the metal reflection strips 315 near the adjacent metal spiral rings 314 is greater than the surface width of the metal reflection strips 315 near the plastic needle body 311 to increase the reflection area during use; the specific principle is that the reflection efficiency of ultrasonic waves on metals is different, and then the position and depth of the puncture needle in the human body are judged by the reflection efficiency on the metal, which is convenient for medical staff to observe.

[0056] On one side of the edge of the inner wall of the guiding groove body 312, a first edge chamfer 3121 is provided. The first edge chamfer 3121 has an arc structure, and the first guiding chamber 313 communicates with the second end port 3132 and the first end port 3131. The second end port 3132 has an elliptical structure, and the first end port 3131 has a circular structure. The metal spiral coil 314 is arranged in a spiral shape along the surface of the plastic needle body 311, and the spiral direction of the metal spiral coil 314 is opposite to that of the guiding groove body 312.

[0057] It should be noted that in this embodiment, the material of the plastic needle body 311 is preferably a hard plastic material component with good ultrasonic penetrability, preferably a PET plastic material. The specific material can be appropriately adjusted according to the use conditions. When the inner needle core rubber head 331 is used in cooperation with ultrasonic waves for guidance, the ultrasonic waves contact the metal spiral coil 314. The materials of both the metal spiral coil 314 and the metal reflection strip 315 are mainly ferroalloy components made of metals that are not easily penetrated by ultrasonic waves and have obvious reflection. The specific material can be appropriately adjusted according to the use requirements to determine the positions of the metal spiral coil 314 and the metal reflection strip 315 in the human body through the reflected ultrasonic waves. When the inner needle puncture assembly 330 passes through the plastic needle body 311, the ultrasonic waves penetrate the plastic needle body 311 and irradiate on the inner metal needle core 334 through the gap between the metal spiral coil 314 and the metal reflection strip 315. The ultrasonic waves are reflected by the inner metal needle core 334, and the specific position of the inner metal needle core 334 moving in the plastic needle body 311 in the body can be visually observed, facilitating the guidance and use of ultrasonic waves.

[0058] Specifically, when the ultrasonic waves guide the plastic needle body 311, the metal spiral coil 314 can reflect the ultrasonic waves, facilitating the observation of the ultrasonic image. At the same time, due to the setting of the metal spiral coil 314, it can also form an auxiliary positioning for the metal reflection strip 315. When the ultrasonic waves irradiate perpendicular to the needle body, since the narrow side of the metal reflection strip 315 close to the ultrasonic detection end has a small irradiated reflection surface, and the wide surface of the metal reflection strip 315 close to both sides of the plastic needle body 311 is irradiated to have a large reflection surface, it is convenient for medical staff to observe and judge.

[0059] By opening the guiding groove body 312, when the inner metal needle core 334 is inserted into the first guiding chamber 313, the moving direction of the inner metal needle core 334 can be kept consistent with the axis direction of the plastic needle body 311. When the guiding strip 332 moves close to the guiding groove body 312, under the action of the first edge chamfer 3121, the guiding strip 332 enters the inside of the guiding groove body 312, thereby forming a guiding effect on the inner metal needle core 334, and then driving the inner needle core rubber head 331 to twist through the inner metal needle core 334.

[0060] Embodiment 3:

[0061] Different from the above embodiments, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 10 shown, the puncture organ assembly 320 includes a metal connector 321 fixedly connected to the end of the plastic needle body 311 away from the needle body connector 200. A second guiding chamber 323 is formed inside the metal connector 321. An annular groove 324 is formed at the end of the metal connector 321 close to the plastic needle body 311. The annular groove 324 communicates with the guiding groove 312, and an annular airbag 325 is fixedly connected to the inner wall of the annular groove 324. A metal puncturing head 322 is fixedly connected to the end of the metal connector 321 away from the plastic needle body 311.

[0062] It should be noted that in this embodiment, the metal connector 321 can form an obvious reflection effect on ultrasonic waves. The material components of the metal connector 321 are the same as those of the metal reflection strip 315. The guiding strip 332 on the surface of the internal metal needle core 334 moves along the guiding groove 312. When the internal needle core rubber head 331 moves in place, at this time, the guiding strip 332 contacts the annular airbag 325 and squeezes the annular airbag 325 so that the surface of the annular airbag 325 gathers towards the middle, thereby clamping the internal needle core rubber head 331 and making the internal needle core rubber head 331 continue to move to generate frictional resistance. The user can determine that the internal needle core rubber head 331 has moved to the predetermined area.

[0063] Wherein, the tip of the metal puncturing head 322 is close to the inner wall of the second guiding chamber 323. Therefore, when the internal needle core rubber head 331 moves to the working position, the puncturing effect of the metal puncturing head 322 can be reduced by the cooperation of the internal needle core rubber head 331 and the metal puncturing head 322.

[0064] Embodiment 4:

[0065] Different from the above embodiments, as Figure 2 and Figure 10As shown, the inner needle puncture assembly 330 includes an inner needle core rubber head 331 slidably connected to the inner wall of the second guiding chamber 323. The end of the inner needle core rubber head 331 away from the metal puncturing head 322 is fixedly connected to an inner metal needle core 334. The other end of the inner metal needle core 334 penetrates to the outside of the needle handle 100. Two guiding strips 332 are fixedly connected to the surface of the inner needle core rubber head 331. A second edge chamfer 333 is arranged on the surface of the guiding strip 332 away from the inner needle core rubber head 331. The second edge chamfer 333 is arc-shaped, and a hard shell is arranged on the surface of the inner needle core rubber head 331.

[0066] It should be noted that in this embodiment, when the puncture needle is in use, the inner needle core rubber head 331 can be inserted along the needle handle 100 towards the puncture organ assembly 320. At this time, the inner needle core rubber head 331 sequentially passes through the needle body connector 200 and the second end port 3132. Since the second end port 3132 is elliptical, it is more convenient for the inner needle core rubber head 331 to enter. When the inner needle core rubber head 331 and the inner metal needle core 334 enter the first guiding chamber 313, the guiding strips 332 will follow and enter the first guiding chamber 313. At this time, the second edge chamfer 333 on the surface of the guiding strip 332 enters the guiding groove body 312 along the first edge chamfer 3121. At this time, one side of the guiding strip 332 moves along the guiding of the guiding groove body 312. When the guiding strip 332 moves into contact with the annular airbag 325, the hard shell is fitted to the sharp section of the metal puncturing head 322, making it difficult for the metal puncturing head 322 to puncture the internal organ, thus ensuring that the puncture does not damage other organs.

[0067] The usage principle of the puncture needle under ultrasonic guidance according to the present invention includes:

[0068] This puncture needle will pierce the patient's organ through the metal puncturing head 322 and insert the plastic needle body 311 into the patient's body. The inner needle core rubber head 331 is used in conjunction with ultrasonic guidance. The ultrasonic wave contacts the metal spiral coil 314. When the inner needle puncturing assembly 330 passes through the plastic needle body 311, the ultrasonic wave penetrates the plastic needle body 311 and is reflected by the metal spiral coil 314, facilitating the observation of the ultrasonic image. At the same time, due to the setting of the metal spiral coil 314, it also provides auxiliary positioning for the metal reflection strip 315. When the ultrasonic wave irradiates perpendicular to the needle body, since the narrow side of the metal reflection strip 315 near the ultrasonic detection end has a small irradiated reflection surface and the wide sides of the metal reflection strips 315 near both sides of the plastic needle body 311 are irradiated, insert the inner needle core rubber head 331 along the needle handle 100 towards the puncturing organ assembly 320. At this time, the inner needle core rubber head 331 sequentially passes through the needle body connector 200 and the second end port 3132. The second end port 3132 is elliptical, making it more convenient for the inner needle core rubber head 331 to enter. The guiding strip 332 follows and enters the interior of the first guiding chamber 313. At this time, the second edge chamfer 333 on the surface of the guiding strip 332 enters the interior of the guiding groove body 312 along the first edge chamfer 3121. At this time, one side of the guiding strip 332 moves along the guiding groove body 312. When the guiding strip 332 moves into contact with the annular airbag 325, the hard outer shell fits with the sharp end of the metal puncturing head 322. The guiding strip 332 on the surface of the inner metal needle core 334 moves along the guiding groove body 312. When the inner needle core rubber head 331 moves into place, at this time, the guiding strip 332 contacts the annular airbag 325 and squeezes the annular airbag 325, causing the surface of the annular airbag 325 to gather towards the middle, clamping the inner needle core rubber head 331 and generating frictional resistance for continued movement.

[0069] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0070] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An ultrasound-guided puncture needle, characterized in that: Comprising: A needle handle (100); A needle body connector (200), arranged at one end of the needle handle (100); A needle body puncture mechanism (300), arranged at the end of the needle body connector (200) away from the needle handle (100) and penetrating through the needle handle (100) and the needle body connector (200), comprising: An outer needle body assembly (310), arranged at the end of the needle body connector (200) away from the needle handle (100), and a puncture organ assembly (320) is arranged at the end of the outer needle body assembly (310) away from the needle body connector (200); An inner needle puncture assembly (330), movably arranged inside the outer needle body assembly (310), one end of the inner needle puncture assembly (330) penetrates through the outer needle body assembly (310) and extends to the outside of the outer needle body assembly (310), the other end penetrates through the puncture organ assembly (320) and extends to the outside of the puncture organ assembly (320), and is matched with the puncture organ assembly (320); The outer needle body assembly (310) includes a plastic needle body (311) arranged at the end of the needle body connector (200) away from the needle handle (100), a first guiding chamber (313) is formed inside the plastic needle body (311), two guiding grooves (312) communicating with the first guiding chamber (313) are also formed inside the plastic needle body (311), and a plurality of metal reflective strips (315) are embedded in the plastic needle body (311); The puncture organ assembly (320) includes a metal connector (321) arranged at the end of the plastic needle body (311) away from the needle body connector (200), a second guiding chamber (323) is formed inside the metal connector (321), an annular groove (324) is formed at the end of the metal connector (321) close to the plastic needle body (311), the annular groove (324) communicates with the guiding groove (312), and an annular airbag (325) is connected to the inner wall of the annular groove (324); The inner needle puncture assembly (330) includes an inner needle core rubber head (331) slidably connected inside the second guiding chamber (323), an inner metal needle core (334) is arranged at the end of the inner needle core rubber head (331) away from the metal puncturing head (322), the other end of the inner metal needle core (334) penetrates to the outside of the needle handle (100), and a guiding strip (332) is arranged on the surface of the inner metal needle core (334); the guiding strip (332) on the surface of the inner metal needle core (334) moves along the guiding groove (312) for guiding. When the inner needle core rubber head (331) moves in place, at this time the guiding strip (332) contacts the annular airbag (325) and squeezes the annular airbag (325) so that the surface of the annular airbag (325) gathers towards the middle, thereby clamping the inner needle core rubber head (311).

2. The puncture needle under ultrasonic guidance according to claim 1, characterized in that: The end of the plastic needle body (311) close to the needle body connector (200) is provided with a second end port (3132) for connection with the needle body connector (200), and the end of the plastic needle body (311) close to the puncture organ assembly (320) is provided with a first end port (3131).

3. The puncture needle under ultrasonic guidance according to claim 2, characterized in that: The guide groove body (312) is spiral, and the two guide groove bodies (312) are symmetrically distributed about the axis of the plastic needle body (311). The depth of the guide groove body (312) gradually decreases from the first end port (3131) to the second end port (3132) until it coincides with the first guide chamber (313).

4. The puncture needle under ultrasonic guidance according to claim 2, characterized in that: A plurality of the metal reflection strips (315) are evenly distributed in a ring along the surface of the plastic needle body (311), and two metal spiral coils (314) are embedded on the surfaces of the plurality of metal reflection strips (315).

5. The puncture needle under ultrasonic guidance according to claim 4, wherein: The surface width of the metal reflection strip (315) close to the adjacent metal spiral coil (314) is greater than the surface width of the metal reflection strip (315) close to the plastic needle body (311).

6. The puncture needle under ultrasonic guidance according to claim 4, characterized in that: The metal spiral coil (314) is spiral along the surface of the plastic needle body (311), and the spiral direction of the metal spiral coil (314) is opposite to that of the guide groove body (312).

7. The puncture needle under ultrasonic guidance according to claim 2, wherein: One side of the edge of the inner wall of the guide groove body (312) is provided with a first edge chamfer (3121), and the first edge chamfer (3121) is arc-shaped.

8. The puncture needle under ultrasonic guidance according to claim 2, characterized in that: The first guide chamber (313) communicates with the second end port (3132) and the first end port (3131). The second end port (3132) is oval, and the first end port (3131) is circular.

9. The puncture needle under ultrasonic guidance according to claim 2, characterized in that: The end of the metal connector (321) away from the plastic needle body (311) is provided with a metal puncture head (322).

10. The puncture needle under ultrasonic guidance according to claim 9, characterized in that: One side of the surface of the guide strip (332) away from the inner metal needle core (334) is provided with a second edge chamfer (333), and the second edge chamfer (333) is arc-shaped.

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