Ultrasonic-guided puncture needle

Abstract

The invention discloses an ultrasound-guided puncture needle, and belongs to the technical field of medical instruments. Comprising a needle handle; the needle body connector is arranged at the end part of one end of the needle handle; the needle body puncture mechanism is arranged at the end part of one end, far away from the needle handle, of the needle body connector and penetrates through the needle handle and the needle body connector; the outer needle body assembly is matched with the inner needle puncture assembly, so that the inner needle puncture assembly running in the outer needle body assembly can be conveniently observed, the inner needle puncture assembly moves more accurately under the guidance of ultrasonic waves, and the puncture needle can also play an auxiliary guiding role in the inner needle puncture assembly in the using process; the puncture needle can be moved to a treatment area of a patient more accurately during use, and the effect of being matched with ultrasonic wave to guide displacement is more accurate; the problem that when a traditional blocking puncture needle is used, an ultrasonic image of a needle core is shielded by a needle body, and consequently the specific movement position of the needle core is not accurate enough is solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a puncture needle under ultrasound guidance. Background Art

[0002] A puncture needle is a medical tool whose main function is to penetrate the skin or other tissues during medical operations in order to perform various diagnostic or therapeutic activities. Ultrasound-guided puncture needles are widely used in the medical field. They combine ultrasound imaging technology and puncture technology to achieve accurate sampling or treatment of target tissues. Ultrasound-guided puncture needles come in a variety of types and specifications to meet the needs of different parts and different lesions. Common types include fine needle aspiration biopsy needles, cutting biopsy needles, negative pressure aspiration biopsy guns, etc. In terms of specifications, the diameter, length, and cutting edge design of the puncture needle will affect the effect and safety of the puncture;

[0003] After searching, a utility model patent with the announcement number CN219354097U disclosed an ultrasound-guided transforaminal nerve block puncture needle, which changed the bevel-shaped needle tip to a cone shape to reduce damage to the nerves and blood vessels around the intervertebral foramen, and set an ultrasound image enhancement area near the needle tip to improve the clarity of ultrasound imaging. However, during the use of the block puncture needle, the needle body will block the ultrasound image of the needle core, which will lead to inaccurate specific position of the needle core movement.

[0004] Based on this, the present invention proposes a puncture needle under ultrasound 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 an ultrasound-guided puncture needle to solve the problem that the needle body of the traditional blocking puncture needle blocks the ultrasound image of the needle core, resulting in inaccurate specific position of the needle core movement.

[0006] The technical solution of the present invention is achieved in this way:

[0007] An ultrasound-guided puncture needle comprises:

[0008] Needle handle;

[0009] A needle body connector is arranged at one end of the needle handle;

[0010] The needle puncture mechanism is arranged at the end of the needle connector away from the needle handle and penetrates the needle handle and the needle connector, and includes:

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

[0012] The inner needle puncture assembly is movably arranged in the outer needle body assembly, and one end of the inner needle puncture assembly penetrates the outer needle body assembly and extends to the outside of the outer needle body assembly, and the other end penetrates the puncture organ assembly and extends to the outside of the puncture organ assembly and matches the puncture organ assembly.

[0013] In a preferred embodiment, the outer needle body assembly includes a plastic needle body arranged at a needle body connector away from the end of the needle handle, a first guide chamber is opened in the plastic needle body, two guide grooves connected to the first guide chamber are also opened in the plastic needle body, and a plurality of metal reflective strips are embedded in the plastic needle body, a second end opening is opened at the end of the plastic needle body close to the needle body connector and connected to the needle body connector, and a first end opening is opened at the end of the plastic needle body close to the puncturing organ assembly.

[0014] In a preferred embodiment, the guide groove body is spiral, and the two guide groove bodies are centrally symmetrically distributed along the axis of the plastic needle body. The depth of the guide groove body gradually decreases from the first end opening to the second end opening until it coincides with the first guide chamber.

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

[0016] In a preferred embodiment, the surface width of the metal reflective strip close to the adjacent metal spiral coil is greater than the surface width of the metal reflective strip close to the plastic needle body.

[0017] In a preferred embodiment, the metal spiral ring is spirally shaped along the surface of the plastic needle body, and the metal spiral ring is in the opposite direction to the spiral direction of the guide groove body.

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

[0019] In a preferred embodiment, the first guide chamber is connected to the second end opening and the first end opening, the second end opening is elliptical, and the first end opening is circular.

[0020] In a preferred embodiment, the puncture organ assembly includes a metal connector arranged at the end of the plastic needle body away from the needle body connector, a second guide chamber is provided in the metal connector, an annular groove is provided at the end of the metal connector close to the plastic needle body, the annular groove is connected to the guide groove, and an annular airbag is connected to the inner wall of the annular groove, and a metal puncturing head is provided 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 internal needle core rubber head slidably connected to the second guide chamber, an internal metal needle core is provided at one end of the internal needle core rubber head away from the metal puncture head, the other end of the internal metal needle core passes through the outside of the needle handle, and a guide strip is provided on the surface of the internal needle core rubber head, a second edge chamfer is provided on the surface of the guide strip away from the internal 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 ultrasound guidance, which has the following beneficial effects:

[0023] 1. Through the arrangement 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 facilitate the observation of the inner needle puncture assembly running inside the outer needle body assembly during the use of the puncture needle, so that the inner needle puncture assembly can move more accurately under the guidance of ultrasound, and the puncture needle can also play an auxiliary guiding role for the inner needle puncture assembly during the use, so that the puncture needle can be more accurately moved to the patient's treatment area during use, achieving a more accurate effect of displacement guided by ultrasound;

[0024] 2. Through the setting of the puncture organ component and the inner needle puncture component, and through the cooperation of the puncture organ component and the inner needle puncture component, the puncture needle can puncture the patient's organ through the puncture organ component, and insert the outer needle body component into the patient's body for treatment, and when the end of the inner needle puncture component moves to the area where the patient needs to be treated, the inner needle puncture component will be guided by the outer needle body component to make the inner needle puncture component fit with the puncture organ component, reducing the puncture of other organs by the puncture organ component, and the inner needle puncture component can be clamped by the set puncture organ component to assist the inner needle puncture component in positioning; it solves the problem that when the traditional blocking puncture needle is used, the needle body will block the ultrasonic image of the needle core, resulting in inaccurate specific position of the needle core movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying creative work.

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

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

[0028] Figure 3 It is a structural schematic diagram of the second end opening of the present invention;

[0029] Figure 4 This is a schematic diagram of the connection between the plastic needle body and the metal connector of the present invention;

[0030] Figure 5 This is a schematic diagram of the internal structure of the plastic needle body of the present invention;

[0031] Figure 6 This is a schematic structural diagram of the first edge chamfer of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the guide slot body of the present invention;

[0033] Figure 8 It is a partial exploded structural cross-sectional view of the needle puncture mechanism of the present invention;

[0034] Fig. 9 An exploded cross-sectional view of the organ puncture assembly of the present invention;

[0035] Fig.10 It is a partial structural schematic diagram of the inner needle puncture assembly of the present invention;

[0036] Fig.11 For the present invention Figure 1 A partial enlarged view of the middle A;

[0037] Fig.12 This is a diagram showing the connection effect of the metal spiral ring and the metal reflective strip of the present invention.

[0038]

Main component symbol description

[0039] 100, needle handle;

[0040] 200, needle body connector;

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

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

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can 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 of the present 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, it indicates 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 specification and claims of the present 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 the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

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

[0047] Combine the following Figure 1-Figure 12 The ultrasound-guided puncture needle of the present invention is described.

[0048] Embodiment 1:

[0049] like Figure 1 and Figure 2 As shown, in one embodiment, a puncture needle under ultrasound guidance includes a needle handle 100, the end of the needle handle 100 is fixedly connected to a needle body connector 200, and the needle body connector 200 is communicated with the end of the needle handle 100; and a needle body puncture mechanism 300 is fixedly connected to the end of the needle body connector 200 away from the needle handle 100, and the needle body puncture mechanism 300 penetrates 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 puncture mechanism 300 includes an outer needle body assembly 310 installed on the end of the needle body connector 200 away from the needle handle 100, and the end of the outer needle body assembly 310 away from the needle body connector 200 is connected to the puncture organ assembly 320, and the 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 arrangement of the needle handle 100, the needle body connector 200 and the needle body puncture mechanism 300, a puncture needle capable of puncturing and biopsy sampling under ultrasound guidance is formed. At the same time, through the arrangement of the outer needle body assembly 310, the puncture organ assembly 320 and the inner needle puncture assembly 330, when in use, the outer needle body assembly 310 can be coordinated with the inner needle puncture assembly 330 to facilitate observation of the inner needle puncture assembly 330 running inside the outer needle body assembly 310, so that under ultrasound guidance, the inner needle puncture assembly 330 can move more accurately, and the puncture needle can also play an auxiliary guiding role for the inner needle puncture assembly 330 during use, so that the puncture needle can be more accurately moved to the patient's treatment area during use, achieving a more accurate effect of cooperating with ultrasound guidance displacement; through the coordination of the puncture organ assembly 320 and the inner needle puncture assembly 330, the puncture needle can be more accurately moved to the patient's treatment area during use, achieving a more accurate effect of cooperating with ultrasound guidance displacement; The needle can puncture the patient's organ through the puncture organ component 320, and the outer needle body component 310 is inserted into the patient's body for treatment. When the end of the inner needle puncture component 330 moves to the area of ​​the patient that needs treatment, the outer needle body component 310 will guide the inner needle puncture component 330 so that the inner needle puncture component 330 and the puncture organ component 320 are fitted together, thereby preventing the puncture organ component 320 from puncturing other organs. The inner needle puncture component 330 can also be clamped by the set puncture organ component 320 to assist in positioning the inner needle puncture component 330. This solves the problem that when a traditional blocking puncture needle is used, the needle body will block the ultrasonic image of the needle core, resulting in inaccurate specific position of the needle core movement.

[0052] Embodiment 2:

[0053] Different from the above-mentioned embodiment 1, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.12 As shown, 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, and the interior of the plastic needle body 311 is provided with a first guide chamber 313 for guiding and moving the inner needle puncture assembly 330, and the interior of the plastic needle body 311 is also provided with two guide grooves 312 for use with the inner needle puncture assembly 330, the guide grooves 312 are connected to the first guide chamber 313, and a plurality of metal reflective strips 315 are embedded and installed in the interior of the plastic needle body 311, and the end of the plastic needle body 311 close to one end of the needle body connector 200 is also provided with a second end opening 3132 connected to 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 opening 3131 connected to the puncture organ assembly 320.

[0054] The guide groove body 312 is arranged in a spiral shape, and the two guide groove bodies 312 are distributed symmetrically along the axis of the plastic needle body 311, and the depth of the guide groove body 312 gradually decreases from the first end opening 3131 to the second end opening 3132 until it coincides with the first guide chamber 313; the guide groove body 312 is used in conjunction with the guide strip 332 on the outside of the internal metal needle core 334 to guide the installation of the internal metal needle core 334.

[0055] The multiple metal reflection strips 315 are evenly distributed in a ring shape along the surface of the plastic needle body 311. Two metal spiral circles 314 are embedded on the surface of the multiple metal reflection strips 315. The surface width of the metal reflection strip 315 close to the adjacent metal spiral circles 314 is larger than the surface width of the metal reflection strip 315 close to the plastic needle body 311, so as to increase the reflection area during use. The specific principle is that the reflection efficiency of ultrasound and metal 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] A first edge chamfer 3121 is provided on one side of the edge of the inner wall of the guide groove body 312, and the first edge chamfer 3121 is an arc-shaped structure, and the first guide chamber 313 is connected with the second end opening 3132 and the first end opening 3131, the second end opening 3132 is an elliptical structure, the first end opening 3131 is a circular structure, and the metal spiral ring 314 is spirally arranged along the surface of the plastic needle body 311, and the spiral direction of the metal spiral ring 314 is opposite to that of the guide 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 penetration, preferably PET plastic material, and the specific material can be appropriately adjusted according to the use conditions. When the internal needle core rubber head 331 is used in conjunction with ultrasonic wave for guidance, the ultrasonic wave contacts the metal spiral ring 314, wherein the material of the metal spiral ring 314 and the metal reflective strip 315 is mainly a metal material iron alloy component that is not easy to be penetrated by ultrasonic wave and has obvious reflection, and the specific material can be appropriately adjusted according to the use requirements, so as to judge the position of the metal spiral ring 314 and the metal reflective strip 315 in the human body by the reflected ultrasonic wave. When the inner needle puncture assembly 330 passes through the plastic needle body 311, the ultrasonic wave penetrates the plastic needle body 311, passes through the gap between the metal spiral ring 314 and the metal reflective strip 315, and irradiates the internal metal needle core 334. The ultrasonic wave is reflected by the internal metal needle core 334, and the internal metal needle core 334 moving in the plastic needle body 311 can be visually observed to run to a specific position in the body, which is convenient for ultrasonic wave guidance and use.

[0058] Specifically, when ultrasound guides the plastic needle body 311, the ultrasound can be reflected by the metal spiral ring 314, which is convenient for observation of ultrasound images. At the same time, due to the setting of the metal spiral ring 314, the metal reflection strip 315 can also be assisted in positioning. When the ultrasound is irradiated perpendicular to the needle body, the narrow side of the metal reflection strip 315 close to the ultrasound detection end is irradiated with a small reflection surface, while the wide side of the metal reflection strip 315 close to both sides of the plastic needle body 311 is irradiated with a large reflection surface, which is convenient for medical staff to observe and judge.

[0059] By opening the guide groove body 312, when the internal metal needle core 334 is inserted into the first guide chamber 313, the movement direction of the internal metal needle core 334 can be consistent with the axial direction of the plastic needle body 311. When the guide bar 332 moves close to the guide groove body 312, the first edge chamfer 3121 allows the guide bar 332 to enter the interior of the guide groove body 312, thereby forming a guiding effect on the internal metal needle core 334, and then the internal metal needle core 334 drives the internal needle core rubber head 331 to twist.

[0060] Embodiment 3:

[0061] Different from the above embodiment, Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 , Fig.10 As 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 guide chamber 323 is provided inside the metal connector 321, an annular groove 324 is provided at the end of the metal connector 321 close to the plastic needle body 311, the annular groove 324 is connected to the guide groove 312, and an annular airbag 325 is fixedly connected to the inner wall of the annular groove 324, and 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 setting of the metal connector 321 can form an obvious reflection effect on ultrasound. The material component of the metal connector 321 is consistent with the material component of the metal reflective strip 315. The guide strip 332 on the surface of the internal metal needle core 334 is guided and moved along the guide groove body 312. When the internal needle core rubber head 331 moves into place, the guide strip 332 contacts the annular air bag 325 and squeezes the annular air bag 325 so that the surface of the annular air bag 325 gathers toward the middle, and then clamps the internal needle core rubber head 331, so that the internal needle core rubber head 331 continues to move to generate friction resistance. The user can determine that the internal needle core rubber head 331 moves to the predetermined area.

[0063] Among them, the tip of the metal piercing head 322 is close to the inner wall of the second guide chamber 323. Therefore, when the internal needle core rubber head 331 moves to the working position, the internal needle core rubber head 331 can cooperate with the metal piercing head 322 to reduce the piercing effect of the metal piercing head 322.

[0064] Embodiment 4:

[0065] Different from the above embodiment, Figure 2 and Fig.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 guide chamber 323, and the end of the inner needle core rubber head 331 away from the metal puncture head 322 is fixedly connected to the inner metal needle core 334, the other end of the inner metal needle core 334 penetrates to the outside of the needle handle 100, and two guide strips 332 are fixedly connected to the surface of the inner needle core rubber head 331, and the surface of the guide strip 332 away from the inner needle core rubber head 331 is provided with a second edge chamfer 333, the second edge chamfer 333 is arc-shaped, and a hard shell is provided 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 internal needle core rubber head 331 can be inserted along the needle handle 100 toward the puncture organ component 320, and at this time, the internal needle core rubber head 331 passes through the needle body connector 200 and the second end opening 3132 in sequence. Since the second end opening 3132 is elliptical, it is more convenient for the internal needle core rubber head 331 to enter. When the internal needle core rubber head 331 is connected to the internal metal needle core 334 and enters the first guide chamber 313, the guide strip 314 is 332 follows and enters the interior of the first guide chamber 313. At this time, the second edge chamfer 333 on the surface of the guide strip 332 enters into the interior of the guide slot 312 along the first edge chamfer 3121. At this time, one side of the guide strip 332 moves along the guide slot 312. When the guide strip 332 moves to contact the annular airbag 325, the hard outer shell fits with the sharp section of the metal puncture head 322, making it difficult for the metal puncture head 322 to puncture organs in the body, thereby preventing the puncture from causing damage to other organs.

[0067] The use principle of the ultrasound-guided puncture needle of the present invention includes:

[0068] The puncture needle will puncture the patient's organ through the metal puncture head 322, and insert the plastic needle body 311 into the patient's body. The internal needle core rubber head 331 is used in conjunction with ultrasonic guidance. The ultrasonic wave contacts the metal spiral ring 314. When the inner needle puncture assembly 330 passes through the plastic needle body 311, the ultrasonic wave penetrates the plastic needle body 311, and the ultrasonic wave is reflected by the metal spiral ring 314, which is convenient for observing the ultrasonic image. At the same time, due to the setting of the metal spiral ring 314, the metal reflection strip 315 is also formed with auxiliary positioning. When the ultrasonic wave is irradiated perpendicular to the needle body, the narrow side of the metal reflection strip 315 close to the ultrasonic detection end is irradiated with a small reflection surface, and the wide side of the metal reflection strip 315 close to both sides of the plastic needle body 311 is irradiated. The internal needle core rubber head 331 is inserted along the needle handle 100 toward the puncture organ assembly 320. At this time, the internal needle core rubber head 331 passes through the needle body connector 200 and The second end opening 3132 is elliptical in shape, which is more convenient for the internal needle core rubber head 331 to enter. The guide strip 332 follows and enters the interior of the first guide chamber 313. At this time, the second edge chamfer 333 on the surface of the guide strip 332 enters into the interior of the guide groove body 312 along the first edge chamfer 3121. At this time, one side of the guide strip 332 moves along the guide groove body 312. When the guide strip 332 moves to the point of contact with the annular airbag 325, the hard shell fits with the sharp end of the metal piercing head 322, and the guide strip 332 on the surface of the internal metal needle core 334 moves along the guide groove body 312. When the internal needle core rubber head 331 moves into place, the guide strip 332 contacts the annular airbag 325 and squeezes the annular airbag 325 so that the surface of the annular airbag 325 gathers toward the middle, clamping the internal needle core rubber head 331 so that continued movement generates friction resistance.

[0069] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An ultrasound-guided puncture needle, characterized in that: include: Needle handle (100); A needle body connector (200) is arranged at one end of the needle handle (100); The needle puncture mechanism (300) is arranged at an end of the needle connector (200) away from the needle handle (100) and penetrates the needle handle (100) and the needle connector (200), and comprises: An outer needle body assembly (310) is arranged at an 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); The inner needle puncture assembly (330) is movably arranged in the outer needle body assembly (310), and one end of the inner needle puncture assembly (330) penetrates the outer needle body assembly (310) and extends to the outside of the outer needle body assembly (310), and the other end penetrates the puncture organ assembly (320) and extends to the outside of the puncture organ assembly (320), and matches with the puncture organ assembly (320).

2. The ultrasound-guided puncture needle according to claim 1, characterized in that: The outer needle body assembly (310) comprises a plastic needle body (311) arranged at the end of the needle body connector (200) away from the needle handle (100), a first guide chamber (313) is provided in the plastic needle body (311), two guide grooves (312) connected to the first guide chamber (313) are also provided in the plastic needle body (311), and a plurality of metal reflective strips (315) are embedded in the plastic needle body (311), a second end opening (3132) is provided at the end of the plastic needle body (311) close to the needle body connector (200) and connected to the needle body connector (200), and a first end opening (3131) is provided at the end of the plastic needle body (311) close to the puncturing organ assembly (320).

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

4. The ultrasound-guided puncture needle according to claim 2, characterized in that: The plurality of metal reflective strips (315) are evenly distributed in a ring shape along the surface of the plastic needle body (311), and two metal spiral rings (314) are embedded on the surface of the plurality of metal reflective strips (315).

5. The ultrasound-guided puncture needle according to claim 4, characterized in that: The surface width of the metal reflective strip (315) close to the adjacent metal spiral coil (314) is greater than the surface width of the metal reflective strip (315) close to the plastic needle body (311).

6. The ultrasound-guided puncture needle according to claim 4, characterized in that: The metal spiral ring (314) is spirally arranged along the surface of the plastic needle body (311), and the spiral direction of the metal spiral ring (314) is opposite to that of the guide groove body (312).

7. The ultrasound-guided puncture needle according to claim 2, characterized in that: A first edge chamfer (3121) is provided on one side of the edge of the inner wall of the guide groove body (312), and the first edge chamfer (3121) is arc-shaped.

8. The ultrasound-guided puncture needle according to claim 2, characterized in that: The first guide chamber (313) is connected to the second end opening (3132) and the first end opening (3131); the second end opening (3132) is elliptical, and the first end opening (3131) is circular.

9. The ultrasound-guided puncture needle according to claim 2, characterized in that: The puncturing organ assembly (320) comprises a metal connector (321) arranged at an end of the plastic needle body (311) away from the needle body connector (200), a second guide chamber (323) being provided in the metal connector (321), an annular groove (324) being provided at the end of the metal connector (321) close to the plastic needle body (311), the annular groove (324) being communicated with the guide groove (312), and an annular air bag (325) being connected to the inner wall of the annular groove (324), and a metal puncturing head (322) being provided at the end of the metal connector (321) away from the plastic needle body (311).

10. The ultrasound-guided puncture needle according to claim 9, characterized in that: The inner needle puncture assembly (330) comprises an inner needle core rubber head (331) slidably connected to the second guide chamber (323); an inner metal needle core (334) is arranged at one end of the inner needle core rubber head (331) away from the metal puncture head (322); the other end of the inner metal needle core (334) penetrates outside the needle handle (100); a guide strip (332) is arranged on the surface of the inner needle core rubber head (331); a second edge chamfer (333) is arranged on the surface of the guide strip (332) away from the inner needle core rubber head (331); and the second edge chamfer (333) is arc-shaped.

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