Ultrasound-guided nerve block needle

Abstract

The present invention provides an ultrasound-guided nerve block puncture needle, which can enhance ultrasonic reflection and thus provide clear imaging. The nerve block puncture needle comprises a needle tip guide area, a needle body, a needle base, an extension tube and a needle tail, wherein the needle tip guide area comprises a puncture end and a guide portion, and a plurality of linearly arranged annular grooves are provided on the shallow surface layer of the tube wall of the guide portion. The ultrasonic reflectivity of the puncture needle of the present invention is significantly improved, the imaging effect is better and clearer, and the safety and effectiveness of puncture are effectively improved.

Description

Technical Field

[0001] The invention relates to the field of anesthesia of medical devices, in particular to a nerve block puncture needle used for imaging under ultrasound guidance. Background Art

[0002] In the modern medical field, it is often necessary to take samples, extract fluids, or inject specific tissues or organs of patients, such as puncturing tissues to obtain living cells, injecting anesthetics or tranquilizers into nerves, etc. Therefore, it is very important to accurately grasp the position of the front end of the puncture needle, and an ultrasonic guidance device is needed for accurate positioning.

[0003] At present, there are various guide areas with different shapes to increase the intensity of ultrasonic reflection. For example: CN101227862 B discloses a puncture needle with a guide area processed into a right-angle prism shape, but many studies have shown that this processing will lead to safety problems such as reduced strength of the puncture needle and breakage of the puncture needle; and the puncture needle with multiple small right-angle reflectors on the needle tube forms a strong reflection under ultrasound, so that the strong echo displayed by the needle tube will interfere with the development of surrounding tissues, especially the tissue behind the needle tube. CN 107343812 A discloses a puncture needle with a dot-shaped depression, but many studies have shown that this type of puncture needle will have unclear images when used in deep tissues of the human body (more than 10cm deep); and the image of the irregular ultrasonic guide graphic structure is easily visually disturbed.

[0004] In summary, the currently available puncture needles will cause unclear ultrasonic images of the puncture needle, making it difficult to grasp the correct position of the puncture needle. In the field of medical anesthesia, there is an urgent need to develop ultrasound-guided puncture needles with excellent ultrasonic reflectivity to improve the accuracy of puncture. Summary of the invention

[0005] The purpose of the present invention is to provide an ultrasound-guided nerve block puncture needle with excellent ultrasound reflectivity.

[0006] The specific technical solutions are as follows:

[0007] An ultrasound-guided nerve block puncture needle comprises: a needle body, a needle base, an extension tube, and a needle tail, wherein the needle body comprises a needle tip guide area and a tube body, the needle tip guide area is located at the front of the needle body, and comprises a puncture end and a guide part, the outer surface of the guide part is provided with a plurality of linearly arranged annular grooves, the annular grooves do not penetrate the tube wall of the needle body, the needle base is arranged at the tail of the needle body and connected to the extension tube, the needle base is provided with a concave surface, the concave surface is provided with a plurality of fine protrusions, the end of the extension tube is connected to the needle tail, the needle tail is an interface for connecting the delivery and suction of liquids, the linearly arranged annular grooves are arranged in parallel in 4-8 rows, each row is 45-90 degrees apart in arc, there are 3-20 annular grooves in each row, and the depth of the annular grooves is 1 / 5-3 / 5 of the thickness of the tube wall of the guide part.

[0008] Furthermore, the depth of the annular groove is 0.010mm-0.100mm.

[0009] Furthermore, the annular grooves are arranged in a straight line in the guide area, and the spacing is 0.01-2.00 mm.

[0010] Furthermore, the width of the annular groove is 0.05-0.4 mm; the width of the middle protrusion is 0.02-0.2 mm.

[0011] Furthermore, the needle tip guiding area is located 1-20 mm near the needle tip.

[0012] Furthermore, the surface of the puncture needle body is provided with a non-resin coating or a resin coating.

[0013] Beneficial Effects

[0014] According to the ultrasound-guided nerve block puncture needle of the present invention, when the irradiation direction of the detection wave of the ultrasonic probe ultrasound or the like is at any angle to the axis of the puncture needle, the puncture needle can be clearly imaged, so that the operator can easily observe the movement trajectory of the needle tip and control the needle tip to accurately reach the destination. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of an ultrasound-guided nerve block puncture needle according to an embodiment of the present invention;

[0016] Among them, 1. needle tip guide area, 2. tube body, 3. needle base, 4. extension tube, 5. needle tail.

[0017] Figure 2 is a schematic diagram of a needle base;

[0018] Among them, 1. The needle base, 2. The small protrusions on the needle base.

[0019] Figure 3 Schematic diagram of the needle tip guide area of ​​the ultrasound-guided nerve block puncture needle according to an embodiment of the present invention;

[0020] Among them, 1. needle tip guide area, 2. puncture end, 3. guide part, 4. annular groove.

[0021] Figure 4 is a schematic cross-sectional view of the guide portion;

[0022] Among them, 1. needle tube, 2. annular groove.

[0023] Figure 5 is an enlarged image of the needle tip guide area. DETAILED DESCRIPTION

[0024] After extensive investigation and in-depth research, the inventors have developed for the first time a uniquely structured ultrasound-guided nerve block puncture needle through a large number of screenings and tests. The ultrasound-guided puncture needle of the present invention has flat inner and outer walls, and when the three-dimensional pattern on the shallow surface of the ultrasound enhancement section of the puncture needle is annular and arranged in a straight line, the ultrasound reflectivity of the puncture needle is significantly higher than that of other three-dimensional patterns, which improves the defect of the puncture needle having a blurred image under ultrasound and greatly improves the accuracy and safety of puncture.

[0025] In the present invention, the terms "ultrasound-guided nerve block puncture needle", "nerve block puncture needle", "puncture needle" and "guide puncture needle" are used interchangeably, and all refer to a puncture needle for ultrasound-guided puncture that has an annular groove in the guide area and has high ultrasonic reflection performance.

[0026] The terms "needle tip", "needle tip guide area" and "needle tip portion" are used interchangeably and refer to a puncture end for puncturing skin and tissue and a guide portion for reflecting ultrasonic echoes, that is, one end (or patient end) of the puncture needle tip of the present invention.

[0027] Clinically, the ultrasound-guided nerve block puncture needle of the present invention can be used for the injection of drugs such as anesthetics or sedatives in the field of anesthesia.

[0028] As shown in FIG1 , an ultrasound-guided nerve block puncture needle in the present invention comprises a needle tip guide area (1) and a tube body (2), the needle body is fixed on a needle base (3), and is connected to an extension tube (4) through the needle base (3), and the other end of the extension tube (4) is connected to a needle tail (5), which is an interface for connecting to deliver and aspirate liquid.

[0029] The material of the puncture needle is medical stainless steel 304 or 316 stainless steel. The toughness strength of the ultrasonic guide area of ​​the puncture needle meets the requirements of GB18457. Preferably, it is measured according to GB18457 and does not break when the bending times are greater than the specified number. The needle body, which can be used for the puncture needle of the present invention, has no special restrictions on the shape and material of the needle body, as long as it is a component that can connect the needle tip guide area and the needle tail of the present invention. Usually, the needle body is a cylindrical tubular structure connected to the needle tip guide area. Usually, its tube diameter, tube wall and material are the same as the guide part of the needle tip guide area.

[0030] The extension tube 4 can be used for the needle base of the puncture needle of the present invention without any special restrictions. It is generally made of medical plastic. Common materials on the market include PVC, TPU, nylon and the like. It is mainly used to extend the injection path of anesthetic drugs.

[0031] The needle tail 5, the shape and material of the needle tail that can be used for the puncture needle of the present invention are not particularly limited. Generally, the needle tail of the present invention is also called the operator end, which is a universal or special interface for injecting anesthetic drugs, and can also be set to a structure connected to any liquid pipeline or syringe required clinically.

[0032] As shown in FIG. 2 , the needle base is provided with a concave surface, which is the finger contact surface, and the surface is provided with dense and tiny protrusions, preferably small cylindrical protrusions. Such densely arranged tiny protrusions can increase the friction between the surface and the finger when the puncture needle is forced into human tissue, thereby playing an anti-slip and stabilizing role, and there is a sense of vibration when the needle enters the human tissue, which is conducive to accurate control.

[0033] like Figure 3 As shown, the needle tip guide area (1) is located at the front part of the needle body, including a puncture end (2) and a guide part (3), and the outer surface of the guide part is provided with a plurality of annular grooves (4) arranged in a linear shape, and the annular grooves do not penetrate the tube wall of the needle body.

[0034] Figure 4 Further, an annular groove 2 is shown, and one or more ultrasonic enhancement sections are provided on the outer surface of the needle tube wall of the guide part, and 4-8 rows of annular grooves are provided on the surface layer of the ultrasonic enhancement section; each row of annular grooves has 3-20 annular grooves and is arranged in a straight line, and each row of annular grooves is 45-90 degrees apart in arc; the annular groove does not penetrate the tube wall of the guide part and the puncture end;

[0035] Preferably, the tube wall thickness of the guide portion of the puncture needle is 0.1 mm-0.2 mm; and the inner surface of the puncture end and the inner surface of the needle tube corresponding to the ultrasonic enhancement section are both smooth surfaces.

[0036] Preferably, the depth of the annular groove of the puncture needle guide portion is 1 / 5-3 / 5 of the thickness of the tube wall of the guide portion.

[0037] Preferably, the depth of the annular groove of the puncture needle guide is 0.010 mm-0.100 mm.

[0038] Preferably, the annular grooves of the puncture needle guide portion are arranged in a straight line in the guide area, and the spacing is 0.01-2.00 mm.

[0039] Preferably, the width of the annular groove of the puncture needle guide portion is 0.05-0.40 mm; the width of the middle convex point is 0.02-0.20 mm; preferably, the needle tip guide area of ​​the puncture needle is located 1-20 mm near the needle tip.

[0040] Preferably, the puncture needle tube body of the puncture needle is resin-free or resin-coated. According to the ultrasound-guided nerve block puncture needle of the present invention, the puncture needle can be clearly imaged when the irradiation direction of the detection wave of the ultrasonic probe ultrasound or the like is at any angle to the axis of the puncture needle.

[0041] According to this embodiment, the ultrasound-guided nerve block puncture needle can achieve the following effects:

[0042] (1) The present invention provides multiple rows of annular recesses on the shallow surface layer of the guide portion of the needle tube body (the annular recesses are arranged linearly in the guide area and each row has 3-20 annular recesses, and 4-8 rows of annular recesses are arranged around the guide area, and each row of annular recesses is 45-90 degrees apart). The wall of the guide portion and the puncture end can make the wall surface reflect ultrasound well, and the puncture needle is clearly imaged. The defect of fuzzy imaging of the puncture needle under ultrasound is improved, and the accuracy and safety of puncture are greatly improved.

[0043] (2) The present invention enables clear imaging when the nerve block puncture needle penetrates human tissue in any direction.

[0044] (3) The present invention can still produce clear images at a depth of 10-15 cm in the deep tissue of the human body.

[0045] (4) The annular depressions of the present invention are arranged in a linear manner, which can be used with the aid of automated equipment to further improve the convenience of production and reduce production costs.

[0046] (5) The ultrasound-guided nerve block puncture needle of the present invention is not easy to break and has good toughness.

[0047] (6) The inner wall of the ultrasound-guided nerve block puncture needle of the present invention is undamaged and has good mechanical properties.

[0048] In short, the present invention has the advantages of simple structure, clear imaging, accurate positioning, etc., and has high clinical use value.

[0049] Those skilled in the art may make other changes or deformations according to the technical solutions and concepts described above, but these changes or deformations should still fall within the scope of protection of the claims of the utility model.

Claims

1. An ultrasound-guided nerve block puncture needle, characterized in that: include: A needle body, a needle base, an extension tube, and a needle tail, wherein the needle body includes a needle tip guide area and a tube body, the needle tip guide area is located at the front of the needle body, including a puncture end and a guide part, the outer surface of the guide part is provided with a plurality of linearly arranged annular grooves, the annular grooves do not penetrate the tube wall of the needle body, the needle base is provided at the tail of the needle body and connected to the extension tube, the needle base is provided with a concave surface, the concave surface is provided with a plurality of small protrusions, the end of the extension tube is connected to the needle tail, the needle tail is an interface for connecting the delivery and suction of liquids, the linearly arranged annular grooves are arranged in parallel in 4-8 rows, each row is 45-90 degrees apart in arc, there are 3-20 annular grooves in each row, and the depth of the annular grooves is 1 / 5-3 / 5 of the thickness of the tube wall of the guide part.

2. The ultrasound-guided nerve block puncture needle according to claim 1, characterized in that: The depth of the annular groove is 0.010mm-0.100mm.

3. The ultrasound-guided nerve block puncture needle according to claim 1, characterized in that: The annular grooves are arranged in a straight line in the guide area, and the spacing is 0.01-2.00 mm.

4. The ultrasound-guided nerve block puncture needle according to claim 1, characterized in that: The width of the annular groove is 0.05-0.4 mm; the width of the middle convex point is 0.02-0.2 mm.

5. The ultrasound-guided nerve block puncture needle according to claim 1, characterized in that: The needle tip guiding area is located 1-20 mm near the needle tip.

6. The ultrasound-guided nerve block puncture needle according to claim 1, characterized in that: The surface of the puncture needle body is provided with a non-resin coating or a resin coating.

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