Needle tube for ultrasonic guidance

Abstract

The utility model discloses a needle tube for ultrasonic guidance, which comprises a tube body, a plurality of inclined pyramid-shaped pits are arranged on the outer surface of the tube body, and the pits are regularly arranged to form at least one developing area. The utility model has the advantages that the development is clear, the rigidity and toughness of the needle tube are high, and the inner diameter of the needle tube can be prevented from being excessively shrunk.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a syringe for ultrasonic guidance. Background Art

[0002] At present, for diagnoses and treatments in hospitals that require accurate positioning of the needle, such as biopsy diagnosis, nerve block, etc., a puncture syringe with enhanced ultrasonic imaging effect is needed to enhance the doctor's perception of the puncture position. For example, when a doctor performs a nerve block, the tip of the needle needs to reach near the target nerve to release anesthetic drugs. However, the doctor must avoid damaging the nerve with the tip of the needle and avoid injecting the anesthetic drug directly into the nerve. Therefore, when performing a nerve block, the doctor needs to accurately master the position of the needle, and thus the ultrasonic imaging enhanced needle appears. Another example is that when a doctor performs a biopsy sampling, the syringe needs to accurately penetrate the biopsy target tissue, and a syringe with enhanced imaging under ultrasound can more accurately indicate the position of the syringe.

[0003] Currently, generally, some features are processed on the surface of the syringe with enhanced ultrasonic imaging. Common ones include triangular pyramid points, round points, parallel rings, intersecting spiral lines, etc. Among them, the triangular pyramid point pits have better imaging effects. For example, the Chinese invention patent with the publication number CN101227862B discloses a puncture needle for ultrasonic use. This puncture needle uses triangular pyramid pits with three mutually perpendicular sides, and has a good imaging effect under ultrasound, and the syringe can be clearly seen in the ultrasonic image. However, the triangular pyramid pits on the surface of the above-mentioned puncture needle are conventional regular triangular pyramid-shaped pits, which are formed by stamping the syringe with a conventional regular triangular pyramid-shaped hard indenter. The stamping process will cause the syringe to deform. And in order to achieve a better imaging effect, the stamped triangular pyramid points often need to be of a larger size, and a larger size will result in a larger stamping depth. For the originally relatively thin syringe, the inner diameter of the stamping area will become smaller, reducing the original space for drug delivery, and there is a risk of blockage during the puncture process; moreover, the wall thickness of the stamping area will also become smaller, affecting the rigidity and toughness of the syringe, and increasing the risk of bending or breaking of the syringe.

[0004] How to solve the above problems has become an urgent technical problem to be solved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a syringe for ultrasonic guidance that can avoid excessive internal contraction of the inner diameter of the syringe and effectively improve the rigidity and toughness of the syringe.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A syringe for ultrasonic guidance provided by the utility model includes a tube body, and a plurality of inclined pyramid-shaped pits are arranged on the outer surface of the tube body, and each of the pits is arranged regularly to form at least one imaging area.

[0008] Further, the connecting line L between the vertex of the point pit and the centroid O of its bottom surface is inclined to the normal line N perpendicular to the bottom surface of the point pit.

[0009] Further, the inclination angle of the point pit is 0 to 30°.

[0010] Further, each of the point pits is distributed around the outer surface of the tube body and the point pits are arranged in several columns along the axial direction of the tube body, and two adjacent columns of point pits are arranged in a rectangular matrix parallel to each other or in a diamond matrix staggered with each other.

[0011] Further, the side length of the bottom surface of the point pit is less than the distance between two adjacent point pits.

[0012] Further, the number of point pits around one circle of the outer surface of the tube body is more than 4, and the number of point pits in each column within each developing area is more than 3.

[0013] Further, two adjacent planes of the point pit are perpendicular to each other.

[0014] Due to the adoption of the above structure, the beneficial effects of the present utility model are as follows:

[0015] By arranging a plurality of point pits on the outer surface of the tube body, and each point pit is arranged regularly to form at least one developing area, the present utility model can achieve a good developing effect, and the point pit is in an inclined pyramid shape, which can improve the reflection efficiency of each point pit to ultrasonic waves, and on the premise that the projected area of the point pit remains unchanged, reduce the pressing depth of the point pit, thereby reducing the degree of inner contraction of the inner diameter of the tube body, and increasing the toughness and rigidity of the developing area, so that the tube body is not easily bent and deformed or broken.

[0016] Through the following description and in conjunction with the accompanying drawings, the present utility model will become clearer, and these drawings are used to explain the embodiments of the present utility model. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for use in the embodiments or the description of the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram for puncture under ultrasonic guidance;

[0019] Figure 2 It is a top view and a half-sectional view of a conventional regular triangular pyramid-shaped point pit;

[0020] Figure 3 Is for stamping Figure 2 The bottom view and front view of a conventional stamping punch for the shown dimple;

[0021] Figure 4 Are the bottom view and front view of a special stamping punch;

[0022] Figure 5 Is the overall structural schematic diagram of the puncture needle of the present utility model;

[0023] Figure 6 Are the front view and top view of the dimples of the present utility model arranged in a rhombic matrix;

[0024] Figure 7 Are the front view and top view of the dimples of the present utility model arranged in a rectangular matrix;

[0025] Figure 8 Are the front view and top view of the present utility model when the number of developing regions is two;

[0026] Figure 9 Is the top view and half-sectional view of the dimple of the present utility model;

[0027] Figure 10 Is Figure 4 The schematic diagram of the shown special stamping punch when stamping an inclined triangular pyramid dimple. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figure 1 、 Figure 2 And Figure 3 , Figure 1 Is the schematic diagram of puncture under ultrasonic guidance, Figure 2 Is the top view and half-sectional view of a conventional regular triangular pyramid-shaped dimple, Figure 3The following are the bottom view and front view of a conventional stamping punch for stamping regular triangular pyramid-shaped dimple pits, and the tip of the stamping punch coincides with its axis. Assume that a doctor uses a conventional triangular pyramid dimple puncture needle with a regular triangular pyramid shape currently on the market. Since there will be a certain angle between the needle insertion angle and the human skin surface during the doctor's ultrasound-guided puncture, there will be a certain included angle between the axis of the needle tube and the direction of ultrasonic wave propagation at this time. The smaller the included angle between the axis of the needle tube and the direction of ultrasonic wave propagation, the less ultrasonic waves reflected by the needle tube are received by the ultrasonic device. Therefore, increasing the needle insertion angle means that the imaging effect of the needle tube weakens. If the normal line of the bottom surface of the triangular pyramid dimple pit on the needle tube forms a certain included angle with the cross-section perpendicular to the axis of the needle tube, the degree of weakening of the imaging effect in the case of a larger needle insertion angle can be slowed down. In other words, when the needle insertion angle is large, if the opening of the triangular pyramid dimple pit deflects towards the direction of the ultrasonic device, the imaging effect of the needle can be improved. The effect of the dimple pit after deflection seen on the needle tube is that the dimple pit tilts a certain angle away from the tip of the needle.

[0030] Please refer to Figure 4 , Figure 4 The following are the bottom view and front view of a special stamping punch, the tip of which is not on its axis, and is used to make the inclined pyramid-shaped dimple pit 2 of the present utility model.

[0031] Please refer to Figures 5 to 10 The present utility model provides a needle tube for ultrasound guidance, including a tube body 1. A plurality of inclined pyramid-shaped dimple pits 2 are arranged on the outer surface of the tube body 1. Each of the dimple pits 2 is arranged regularly to form at least one imaging area, which can achieve a good imaging effect. Moreover, the dimple pits 2 are in the shape of inclined pyramids, which can improve the reflection efficiency of each dimple pit 2 to ultrasonic waves. And when the projected area of the dimple pit 2 remains unchanged, the pressing depth of the dimple pit 2 can be reduced, thereby reducing the degree of inward shrinkage of the inner diameter of the tube body 1, and increasing the toughness and rigidity of the imaging area, so that the tube body 1 is not easily bent or broken. In the present utility model, the dimple pit 2 is a triangular pyramid dimple pit. The end of the dimple pit 2 close to the inside of the tube body 1 is its vertex, and the side of the dimple pit 2 away from the inside of the tube body 1 is its bottom surface.

[0032] In the present utility model, the connection line L between the vertex of the dimple pit 2 and the centroid O of its bottom surface is inclined to the normal line N perpendicular to the bottom surface of the dimple pit 2. This structure can improve the reflection efficiency of each dimple pit 2 to ultrasonic waves. And when the projected area of the dimple pit 2 remains unchanged, the pressing depth of the dimple pit 2 can be reduced, thereby reducing the degree of inward shrinkage of the inner diameter of the tube body 1 and increasing the toughness and rigidity of the imaging area.

[0033] Table 1 shows the difference in the projected area between the inclined triangular pyramid dimple pit formed by using a special stamping punch and the conventional triangular pyramid dimple pit formed by using a conventional stamping punch under the condition that the dimple pit depths are the same. The details are as follows:

[0034] Table 1

[0035]

[0036]

[0037] It can be seen that the projected area of the inclined triangular pyramid point pit is increased by 30.65% compared with that of the conventional triangular pyramid point pit. The increase in the projected area of the point pit can increase the amount of ultrasonic waves received and improve the ultrasonic imaging effect.

[0038] Table 2 shows the difference in depth between the inclined triangular pyramid point pit formed by stamping with the above-mentioned stamping punch and the conventional triangular pyramid point pit formed by stamping with the traditional stamping punch when the projected areas of the point pits are the same, which is specifically as follows:

[0039] Table 2

[0040] Depth (mm) <![CDATA[Projected area (mm 2 )]]> Regular triangular pyramid point pit 0.073 0.01385 Inclined triangular pyramid point pit 0.051 0.01385

[0041] It can be seen that the depth of the inclined triangular pyramid point pit is reduced by 30.14% compared with that of the conventional triangular pyramid point pit. With the same projected area of the point pit, the smaller depth, the larger wall thickness of the puncture needle, and the better rigidity and toughness.

[0042] In the present utility model, the inclination angle of the point pit 2 is 0 - 30°. For example, the inclination angle of the point pit 2 is 20° or 30°.

[0043] In the present utility model, each of the point pits 2 is distributed around the outer surface of the tube body 1 and the point pits 2 are arranged in several columns along the axial direction of the tube body 1. The adjacent two columns of point pits 2 are arranged in a rectangular matrix parallel to each other or in a diamond matrix staggered with each other.

[0044] In the present utility model, the side length of the bottom surface of the point pit 2 is less than the distance between two adjacent point pits 2.

[0045] In the present utility model, the number of point pits 2 around the outer surface of the tube body 1 in one circle is more than 4, and the number of point pits 2 in each column in each of the imaging regions is more than 3, and the above numbers of point pits 2 all include this number. For example, the number of point pits 2 around the outer surface of the tube body 1 in one circle is 4 or 6 or 8, and the number of point pits 2 in each column in each of the imaging regions is 3 or 6 or 9.

[0046] In the present utility model, the distance between two adjacent point pits 2 is 0.44 mm, and the depth of the point pit 2 is 0.04 mm.

[0047] In the present utility model, the two planes adjacent to the point pit 2 are perpendicular to each other.

[0048] In the present utility model, the outer diameter of the tube body 1 is 0.7 mm and the inner diameter of the tube body 1 is 0.4 mm.

[0049] In the present utility model, as one of the more preferred structures, the diameter of the syringe needle 1 is 0.7 mm and the inner diameter is 0.4 mm. The size of the dimple 2 is 0.21 mm, the depth of the dimple 2 is 0.04 mm. The number of dimples 2 arranged along the axial direction of the syringe needle 1 is 6, and the distance between two adjacent dimples 2 is 0.44 mm. The number of dimples 2 surrounding the outer surface of the syringe needle 1 in one week is 6. Each dimple 2 is arranged in a rectangular matrix or a rhombic matrix along the axial direction of the syringe needle 1, and the inclination angle of the dimple 2 is 20° or 30°.

[0050] The preferred embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments. The devices and structures not described in detail should be understood to be implemented in a common manner in the art. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model still fall within the scope of the protection of the technical solution of the present utility model.

Claims

1. A needle tube for ultrasound guidance, comprising a tube body (1); characterized in that: The outer surface of the tube body (1) is provided with a plurality of inclined pyramid-shaped pits (2), and each of the pits (2) is regularly arranged to form at least one developing area.

2. The ultrasound-guided needle tube according to claim 1, characterized in that: The line L between the vertex of the spot pit (2) and the center of gravity O of its bottom surface is inclined to the normal line N perpendicular to the bottom surface of the spot pit (2).

3. The ultrasound-guided needle tube according to claim 2, characterized in that: The inclination angle of the pit (2) is 0-30°.

4. The ultrasound-guided needle tube according to claim 2, characterized in that: The pits (2) are distributed around the outer surface of the tube body (1) and are arranged in a plurality of rows along the axial direction of the tube body (1). The pits (2) in two adjacent rows are arranged in parallel to form a rectangular matrix or are arranged in an interlaced diamond matrix.

5. The ultrasound-guided needle tube according to claim 4, characterized in that: The side length of the bottom surface of the spot pit (2) is smaller than the distance between two adjacent spot pits (2).

6. The ultrasound-guided needle tube according to claim 4, characterized in that: The number of the dot pits (2) surrounding the outer surface of the tube body (1) is more than 4, and the number of the dot pits (2) in each row in each developing area is more than 3.

7. The ultrasound-guided needle tube according to any one of claims 1 to 6, characterized in that: Two adjacent planes of the spot pits (2) are perpendicular to each other.

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