Puncture suction needle capable of adjusting suction range

Abstract

The utility model relates to the technical field of medical instruments, in particular to a puncture aspiration needle capable of adjusting aspiration range, which comprises a needle cylinder component, the needle cylinder component comprises an outer sleeve, an inner sleeve and a central cylindrical needle core, a plurality of side holes are sequentially arranged at 1 / 3 positions of the peripheral surface of the end of the outer sleeve, the diameter of each side hole is 1-2mm, and the diameter of each side hole is 1-2mm. The distance between the outer sleeve and the inner sleeve is 5 mm, the outer sleeve and the inner sleeve are fixed in a sealed mode through a rubber layer, the end of the center cylindrical needle core is in a triangular pyramid shape, the device only needs to puncture the far end of a focus at a time, a puncture needle channel does not need to be adjusted, the suction range can be freely adjusted, the tube is not prone to being blocked, and particularly suction of the focus with separation is very convenient. The problems that in the prior art, the suction range is limited and cannot be adjusted, and far-end tissue is prone to being damaged are effectively solved, and the overall use efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a puncture and aspiration needle with adjustable aspiration range. Background Technology

[0002] A search of existing Chinese patent document CN219089558U reveals a puncture and aspiration needle outer tube sleeve, comprising a plastic tube and an outer needle tube. The plastic tube has rubber blocks inside its rear end and central main structure. This invention features a sloping front end with a reinforced surface, and a three-way connector and triangular reinforcing ribs on the handle side to enhance connection strength. The internal structure includes a connection assembly structure with the needle tube. The front end of the assembly position features a V-shaped slope, and the internal hollow structure is cone-shaped with an arc-shaped surface. A rubber block is located in the center. The three-way connector on the handle side enhances connection strength, facilitates assembly, and improves versatility. The rubber block automatically seals after the needle core is removed, improving operational convenience. The added three-way connector provides the operator with adequate operating space during clinical puncture procedures, increasing safety and reliability, and improving sampling effectiveness and stability.

[0003] Interventional therapy is now widely used in clinical practice, and its proportion in clinical settings is increasing year by year. In recent years, the proportion of puncture and aspiration has been increasing, including common procedures such as pleural effusion, ascites, aspiration of liver cysts, renal cysts, and aspiration of liver abscesses. Common interventional consumables for aspiration include puncture needles and drainage tubes. While commercially available puncture needles can be used for puncture, there are still some problems with directly aspirating fluid after puncture. The main problems are: 1. Puncture needles lack side holes. This not only limits the aspiration range but also makes the single side hole prone to blockage, making it easier to get close to the cyst wall and causing poor aspiration; 2. The aspiration range cannot be adjusted; currently, only the distal part of the needle tip can be aspirated, especially for septated lesions, where the aspiration range of a single puncture needle is limited; 3. The distal end of the puncture needle is often beveled, which can easily damage distal tissues. Utility Model Content

[0004] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a puncture and aspiration needle with an adjustable aspiration range. Specifically, it addresses the following issues: 1. The puncture needle lacks side holes. This not only limits the aspiration range but also makes the single side hole prone to blockage, allowing it to easily approach the cyst wall and causing poor aspiration; 2. The aspiration range cannot be adjusted; currently, only the distal end of the needle tip can be aspirated, especially for septate lesions, where the aspiration range of a single puncture needle is limited; 3. The distal end of the puncture needle is often beveled, easily damaging distal tissues.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a puncture and aspiration needle with adjustable aspiration range, comprising a syringe assembly, which includes an outer tube, an inner tube, and a central cylindrical needle core. The outer tube has side holes arranged in a series at one-third of its circumference, with a diameter of 1-2 mm and a spacing of 5 mm. The outer tube and the inner tube are sealed and fixed by a rubber layer. The end of the central cylindrical needle core is shaped like a triangular pyramid.

[0007] As a further description of the above technical solution:

[0008] The outer tube is cylindrical with a circular hole in the middle and a length of 10-20cm. One side of the outer tube has a scale with 1mm increments and 5mm increments. The outer tube has a frosted layer within 10mm of its distal end.

[0009] As a further description of the above technical solution:

[0010] The outer and inner sleeves are configured to correspond in size. The central cylindrical needle core extends 1-3 mm beyond the outer and inner sleeves, and the extended portion of the central cylindrical needle core is configured in a triangular pyramid shape.

[0011] This utility model has the following beneficial effects:

[0012] In this invention, the device only requires one puncture to the distal end of the lesion, without the need to adjust the puncture needle path. The aspiration range can be freely adjusted, and the tube is not easily blocked. It is particularly convenient for aspiration of septate lesions. It effectively solves the problems of limited aspiration range, inability to adjust the aspiration range, and easy damage to distal tissues in the prior art, and effectively improves the overall efficiency of use. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structural assembly of this utility model;

[0015] In the diagram: 1. Outer sleeve; 2. Inner sleeve; 3. Central cylindrical needle core; 4. Side hole. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] In the attached diagram, all identical reference numerals refer to the same components.

[0018] Example 1

[0019] Reference Figure 1 The present invention provides an embodiment of a puncture and aspiration needle with adjustable aspiration range, comprising a syringe assembly, which includes an outer tube 1, an inner tube 2, and a central cylindrical needle core 3. Side holes 4 are provided at one-third of the periphery of the end of the outer tube 1, and multiple side holes 4 are arranged sequentially, with a diameter of 1-2 mm and a spacing of 5 mm. The outer tube 1 and the inner tube 2 are sealed and fixed by a rubber layer, and the end of the central cylindrical needle core 3 is set in a triangular pyramid shape.

[0020] The outer tube 1 is cylindrical with a circular hole in the middle and a length of 10-20cm. One side of the outer tube 1 has a scale mark with a 1mm increment and a 5mm increment. The outer tube 1 has a frosted layer within a 10mm radius at its far end.

[0021] The outer sleeve 1 and inner sleeve 2 are configured to correspond to each other. The central cylindrical needle core 3 extends beyond the outer sleeve 1 and inner sleeve 2 by 1-3 mm, and the part of the central cylindrical needle core 3 that extends beyond the outer sleeve 1 and inner sleeve 2 is set in a triangular pyramid shape.

[0022] Specifically, the puncture needle of the adjustable aspiration needle is designed with three layers: the outermost layer is a tubular outer sheath 1, the middle layer is a hollow inner sheath 2, and the center is a central cylindrical needle core 3. The outer sheath 1 maintains the size of the puncture path, and the length determines the puncture depth. The scale on the outer sheath 1 guides the puncture depth. The distal 10mm of the outer sheath 1 has a frosted surface to increase puncture friction. The outer tube 1 has holes punched around its circumference at 5mm intervals. The side holes 4 are about 1-2mm in diameter and serve as inlets for aspirating liquid. The outer tube 1 has round holes around its circumference. The side holes 4 allow the liquid around the puncture needle to flow into the outer tube 1 under negative pressure and then be aspirated out through the inner tube 2. The outer tube 1 has depth markings on its surface. The inner tube 2 is tightly connected to the outer tube 1 like the inner core of a syringe and can be pulled out to different depths. The tube body shows the length of the pulled-out markings. When puncturing through the inner tube 2, the inner tube 2 is fully inserted into the outer tube 1 and is of the same length and fits tightly with the outer tube 1. At this time, the inner tube 2 completely seals the side holes 4 of the outer tube 1. Once the needle reaches the lesion area, the inner cannula 2 can be pulled outwards to expose the side hole 4 of the outer cannula 1. The length of the pullback can be displayed on the proximal outer wall of the inner cannula 2, with 1mm increments. The central cylindrical needle core 3 serves as the main support for puncture. During puncture, the inner cannula 2 is inserted, extending 1-3mm beyond both the inner cannula 2 and the outer cannula 1. This extended portion is triangular in shape and serves to divide the tissue during puncture. After puncturing the lesion, the central cylindrical needle core 3 can be withdrawn, and the proximal section of the inner cannula 2 can be aligned with the distal end of the syringe. This facilitates aspiration of the inner cannula 2 using the syringe. The aspiration range is consistent with the exposed area of ​​the side hole 4 of the outer cannula 1, effectively improving the overall usability of the adjustable aspiration needle.

[0023] Working principle: The three sets of devices are sealed together and punctured to the distal end of the lesion. Pulling out the central cylindrical needle core 3 allows for direct aspiration. After pulling out the inner cannula 2, the exposed side hole 4 of the outer cannula 1 allows for aspiration. The length of the inner cannula 2 controlled by the distance from the distal to the proximal end of the lesion. In use, the central cylindrical needle core 3 is inserted into the inner cannula 2, and then together with it into the outer cannula 1. After assembly, the distal 1-3mm triangular pyramidal end of the central cylindrical needle core 3 is exposed. After the skin is broken open with a scalpel, the puncture needle is inserted into the lesion. The central cylindrical needle core 3 is then pulled out. Depending on the size of the fluid around the puncture needle, the inner cannula 2 is pulled out to the appropriate length. The length pulled out can be observed on the outer wall of the inner cannula 2, exposing the side hole 4 of the outer cannula 1. A syringe is connected to the inner cannula 2, and negative pressure aspiration is applied. Under negative pressure, the fluid around the puncture needle is drawn through the side hole 4 of the outer cannula 1 into the outer cannula 1, and then through the inner cannula 2 into the syringe until all the fluid around the puncture needle is aspirated. If the coverage area of ​​the puncture needle is not large enough, you can first aspirate the distal fluid. After aspiration is complete, withdraw the puncture needle and continue aspirating the proximal fluid.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A puncture-aspiration needle capable of adjusting the range of aspiration, comprising a needle-cylinder assembly, characterized in that, Said needle cylinder assembly includes outer sleeve (1), inner sleeve (2) and center cylindrical needle core (3), the surface of outer sleeve (1) end 1 / 3 is uniformly provided with side hole (4), the side hole (4) is sequentially arranged, the diameter is 1-2mm, the interval distance is 5mm, outer sleeve (1) and inner sleeve (2) are sealed and fixed by rubber layer, the end of center cylindrical needle core (3) is provided with three pyramid.

2. The puncture-aspiration needle capable of adjusting the range of aspiration according to claim 1, wherein, Said outer sleeve (1) is provided with cylindrical body, the middle part is provided with circular hole, the length is 10-20cm, the outer sleeve (1) one side surface is provided with scale mark, every 1mm has a scale, 5mm has a large scale, the outer sleeve (1) remote end 10mm range is provided with frosted layer.

3. The puncture-aspiration needle capable of adjusting the range of aspiration according to claim 1, wherein, Said outer sleeve (1) and inner sleeve (2) are correspondingly provided, the center cylindrical needle core (3) exceeds outer sleeve (1) and inner sleeve (2) 1-3mm, the exceeding part of center cylindrical needle core (3) is provided with three pyramid.

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