Safe and accurate positioning ultrasonic puncture needle

Abstract

The ultrasonic puncture needle comprises a hollow needle tube, a needle point is arranged at the far end of the needle tube, the needle point comprises an outer surface and an inner wall face, blade faces comprise the first blade face and the second blade faces, a blade point is formed at the intersection of the two second blade faces, at least one reflection groove is formed in the inner wall face of the needle point, and the reflection groove is communicated with the first blade face and the second blade face. When the number of the reflection grooves is multiple, the multiple reflection grooves are sequentially arranged at intervals from the near end to the far end in the direction where the blade point is located, the reflection grooves are in a multi-face pyramid shape, the tangent plane of each groove forms a reflection face, and the distance between the reflection groove closest to the blade point and the blade point is smaller than or equal to 0.5 mm. The scheme can be suitable for scenes needing high-precision puncture positioning, the positioning accuracy of the puncture needle, especially the needle point position of the puncture needle is further improved, positioning errors are avoided, the puncture success rate is increased, and meanwhile the friction resistance of the developing part on the peripheral face of the puncture needle can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, and in particular to a safe and accurately positioned ultrasonic puncture needle. Background Art

[0002] The technique of puncture and catheterization guided by ultrasound visualization is a widely used puncture and catheterization technique in clinical practice. This technique has two core difficulties: one is to achieve the accuracy of puncture needle positioning and ensure the clarity of imaging under the guidance of ultrasound visualization; the other is to control the friction resistance of the outer peripheral surface of the distal end of the puncture needle to the minimum as much as possible.

[0003] The existing ultrasound visualization method mainly adds various types of developing structures on the outer peripheral surface of the distal end of the puncture needle to improve the ultrasonic reflection ability of the developing part of the puncture needle, so that these developing parts are easy to identify, track and locate, thereby achieving the purpose of safe puncture. This type of developing structure includes pits / prismatic pits, such as the ultrasonic puncture needle disclosed in the invention patent with the authorization announcement number CN101227862B, which has a plurality of triangular pyramid-shaped pits arranged in the circumferential direction of the needle tube body. The triangular pyramid-shaped pits are composed of three mutually perpendicular mirrors. This type of structure can achieve ultrasonic reflection through the mirrors; some developing structures are spiral structures or annular structures, such as the utility model patent with the authorization announcement number CN216797775U, which provides a new type of ultrasonic developing puncture needle structure, which adopts an axial annular groove structure to reduce scattering attenuation and enhance ultrasonic echo characteristics, so as to achieve the purpose of enhancing ultrasonic development.

[0004] The above-mentioned developing structure has the following disadvantages: 1. Prismatic or annular or spiral grooves are arranged on the outer circumference of the puncture needle. The pits, spirals and other features of these developing parts are obtained by processing on the outer wall of the needle tube by laser, grinding and other processing methods. The shape and processing method of these developing structures increase the friction resistance of the developing parts on the outer circumference of the puncture needle, thereby affecting the control of puncture needle insertion and affecting the comfort of patient treatment during the puncture process; 2. Most of the current developing structures are arranged on the outer circumference of the needle tube. The distance between the developing structure and the tip of the needle tip is relatively long, usually reaching more than 3mm, which is easy to affect the accuracy of the puncture needle positioning and cause positioning errors, making it very difficult to puncture some smaller blood vessels or parts that require precise puncture positioning. It is easy to observe that the developing structure is inside the blood vessel, but the actual needle tip is already outside the blood vessel, resulting in puncture failure. Timely adjustments are required during the puncture process to avoid puncture failure as much as possible, which requires extremely high personal operating experience and reaction speed of the operator. Utility Model Content

[0005] Therefore, in order to solve the above problems, the utility model provides a safe and accurately positioned ultrasonic puncture needle.

[0006] The utility model is realized by the following technical solutions:

[0007] A safe and precisely positioned ultrasonic puncture needle comprises a hollow needle tube, a needle tip is arranged at the distal end of the needle tube, the needle tip comprises an outer surface and an inner wall surface, and a blade surface formed between the outer surface and the inner wall surface of the needle tip, the blade surface comprises a first blade surface and two symmetrical second blade surfaces extending from the distal end of the first blade surface and intersecting with each other, the intersection of the two second blade surfaces forms a blade tip, at least one reflection groove is arranged on the inner wall surface of the needle tip, when there are multiple reflection grooves, the multiple reflection grooves are arranged in sequence from the proximal end to the distal end in the direction of the blade tip, the reflection groove is in the shape of a multi-faceted pyramid, including three or more groove cut surfaces, each groove cut surface forms a reflection surface of the reflection groove, and the distance between a reflection groove closest to the blade tip and the blade tip is ≤0.5mm.

[0008] Preferably, the multiple reflective surfaces in the reflective groove intersect at one point or on a straight line, and the intersection point or intersection line of the multiple reflective surfaces in each reflective groove is located on the same straight line as the blade tip.

[0009] Preferably, a developing structure is also provided on the outer peripheral surface of the needle tube.

[0010] Preferably, the developing structure is a plurality of circular pits arranged on the outer circumferential surface of the needle tube, and the circular pits smoothly transition to the outer circumferential surface of the needle tube.

[0011] Preferably, the circular pit is a disc-shaped pit with an elliptical outer contour, and the length and width of the disc-shaped pit are both greater than its depth.

[0012] Preferably, the circular pits are arranged in an array on the outer circumferential surface of the needle tube.

[0013] Preferably, it comprises a plurality of circles of circular pits which are arranged at equal intervals on the outer circumference of the needle tube, the length distance between two adjacent circles of circular pits is the same, and the circular pits in the same circle are arranged at equal angles on the outer circumference of the needle tube with the axis of the needle tube as the axis.

[0014] Preferably, three or more reflective grooves are arranged on the inner wall surface of the needle tip, and the interval distance between two adjacent reflective grooves is the same.

[0015] Preferably, the spacing distance between two adjacent reflection grooves is 1 / 2 of the length distance between two adjacent circles of circular pits.

[0016] Preferably, the reflective groove on the inner wall surface of the needle tip is a triangular pyramid reflective groove or a quadrangular pyramid reflective groove.

[0017] The beneficial effects of the technical solution of the utility model are mainly reflected in:

[0018] 1. A multifaceted pyramid-shaped reflection groove is arranged on the inner wall surface of the needle tip. The reflection groove includes three or more reflection surfaces, which can achieve a better ultrasonic imaging effect. At the same time, the reflection groove is arranged on the inner wall surface of the needle tip, which can greatly shorten the distance between the imaging structure and the blade tip, so that the distance between the imaging groove and the blade tip is ≤0.5mm. It can be used in scenes requiring high-precision puncture positioning, further improve the positioning accuracy of the puncture needle, especially the needle tip position of the puncture needle, avoid positioning errors, and improve the puncture success rate.

[0019] 2. A reflective groove with multiple reflective surfaces is provided on the inner wall surface of the needle tip that is not in direct contact with the patient's puncture site, and a dish-shaped pit with a shallow groove body that has a smooth transition with the outer surface of the needle tube and a smooth transition with the outer surface of the needle tube is provided on the outer surface of the needle tube. This increases the imaging area while reducing the friction resistance of the imaging part on the outer surface of the puncture needle, thereby ensuring the comfort of the patient during the puncture process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side perspective view of the ultrasound puncture needle being safely and accurately positioned;

[0021] Figure 2 It is a three-dimensional image of a safe and accurate positioning ultrasonic puncture needle (at this time, no developing structure is set on the outer periphery of the needle tube and the reflection groove is a triangular pyramid);

[0022] Figure 3 It is a three-dimensional image of a safe and accurate positioning ultrasonic puncture needle (at this time, no developing structure is set on the outer periphery of the needle tube and the reflection groove is a quadrangular pyramid);

[0023] Figure 4 It is a three-dimensional image of a safe and accurate positioning ultrasonic puncture needle (in this case, a developing structure is set on the periphery of the needle tube and the reflection groove is a triangular pyramid);

[0024] Figure 5 It is a three-dimensional image of a safe and accurately positioned ultrasonic puncture needle (in this case, a developing structure is set on the periphery of the needle tube and the reflecting groove is a quadrangular pyramid);

[0025] Figure 6 It is a perspective schematic diagram of the working state of the contour electrode discharge machining of the reflection groove of the ultrasonic puncture needle for safe and accurate positioning. DETAILED DESCRIPTION

[0026] In order to make the purpose, advantages and features of the utility model more clearly and in detail, the following preferred embodiments are illustrated and explained through non-limiting descriptions. This embodiment is only a typical example of the application of the technical solution of the utility model. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the utility model.

[0027] At the same time, it is stated that in the description of the scheme, it should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "front", "back", "inside", "outside", "far", and "near" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0028] In addition, the terms "first" and "second" in this solution are only used for descriptive purposes and cannot be understood as indicating or implying the order of importance, or implicitly indicating the number of technical features shown. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] The utility model discloses a safe and accurate positioning ultrasonic puncture needle, such as Figure 2 , Figure 3 As shown, it includes a hollow needle tube 1, and a needle tip is arranged at the distal end of the needle tube 1, wherein the distal end refers to the end close to the patient's puncture site, and the proximal end refers to the end close to the operator, the needle tip includes an outer surface 2 and an inner wall surface 3, and a blade surface formed between the outer surface 2 and the inner wall surface 3 of the needle tip, the blade surface includes a first blade surface 5 and two symmetrical second blade surfaces 6 extending from the distal end of the first blade surface 5 and intersecting, and the intersection of the two second blade surfaces 6 forms a blade tip 7. In some embodiments, the second blade surface 6 is a concave arc surface, thereby reducing the width of the needle tip and improving the comfort of puncture.

[0030] like Figure 1-Figure 5 As shown, at least one reflective groove 4 is provided on the inner wall surface 3 of the needle tip. When there are multiple reflective grooves 4, the multiple reflective grooves 4 are sequentially spaced from the proximal end to the distal end in the direction of the blade tip 7. The reflective groove 4 is in a multi-faceted pyramid shape, including three or more groove sections. In some embodiments, the reflective groove 4 on the inner wall surface 3 of the needle tip is a triangular pyramid reflective groove 4 or a quadrangular pyramid reflective groove 4, and each groove section forms a reflective surface of the reflective groove 4. The distance between the reflective groove 4 closest to the blade tip 7 and the blade tip 7 is ≤0.5 mm. It can be applied to the scenarios requiring high-precision puncture positioning, further improving the positioning accuracy of the puncture needle, especially the needle tip of the puncture needle, avoiding positioning errors, and improving the success rate of puncture. Specifically, the reflection groove 4 needs to be arranged on the part of the inner wall surface 3 of the needle tip exposed to the outside. In a preferred embodiment, the multiple reflection surfaces in the reflection groove 4 intersect at one point or on a straight line, and the intersection point or intersection line of the multiple reflection surfaces in each reflection groove 4 is located on the same straight line as the blade tip 7, thereby improving the positioning accuracy of the reflection groove 4 and the blade tip 7.

[0031] In some embodiments, the reflective groove 4 is processed by laser cutting. In a preferred embodiment, Figure 6 As shown, the reflection groove 4 is processed by discharge machining at the corresponding position of the reflection groove 4 using a specific shape of the profiling electrode to obtain various forms of reflection grooves 4. Specifically, the end of the profiling electrode is the same shape as the reflection groove 4 to be processed. This type of processing method will not cause deformation of the needle tip and avoid damaging the sharpness of the needle tip.

[0032] Among them, the outer peripheral surface of the needle tube 1 is also provided with a developing structure, such as Figure 1 , Figure 4 , Figure 5 As shown, in some embodiments, the developing structure is a plurality of circular pits 8 arranged on the outer circumferential surface of the needle tube 1, and the circular pits 8 have a smooth transition with the outer circumferential surface of the needle tube 1, thereby avoiding increasing the friction resistance at the junction of the circular pits 8 and the outer circumferential surface of the needle tube 1. In a preferred embodiment, the circular pits 8 are disc-shaped pits with an elliptical outer contour, and the length and width of the disc-shaped pits are both greater than their depth. On the one hand, the developing area of ​​the circular pits 8 can be increased, and on the other hand, the disc-shaped pits with shallower grooves can reduce the height difference between the pits and the outer circumferential surface of the needle tube 1, further reducing the friction resistance.

[0033] In some embodiments, the circular pits 8 are arranged in an array on the outer circumferential surface of the needle tube 1. In a preferred embodiment, the circular pits 8 arranged in an array on the outer circumferential surface of the needle tube 1 include multiple circles of circular pits 8 arranged at equal intervals on the outer circumferential surface of the needle tube 1, and the length distance d between two adjacent circles of circular pits 8 is the same. The circular pits 8 in the same circle are arranged at equal angles on the outer circumferential surface of the needle tube 1 with the axis of the needle tube 1 as the axis, which can ensure the uniformity of the arrangement on the outer circumferential surface of the needle tube 1. In addition, multiple circles of circular pits 8 with the same length distance can further improve the accuracy of puncture needle positioning.

[0034] In some embodiments, three or more reflective grooves 4 are arranged on the inner wall surface 3 of the needle tip, and the interval distance between two adjacent reflective grooves 4 is the same. The number and spacing of the reflective grooves 4 can be adjusted according to factors such as the exposed length of the inner wall surface 3 of the needle tip and the length of the reflective grooves 4, which will not be described in detail here. Figure 1 As shown, in a preferred embodiment, the spacing distance between two adjacent reflection grooves 4 is 1 / 2 of the length distance d between two adjacent circles of circular pits 8, thereby improving the correlation between the positioning of the reflection grooves 4 and the circular pits 8, facilitating comparison during ultrasonic imaging, and further improving the accuracy of positioning the overall imaging structure of the puncture needle.

[0035] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A safe and accurate positioning ultrasonic puncture needle, comprising a hollow needle tube, a needle tip is arranged at the distal end of the needle tube, the needle tip comprises an outer surface and an inner wall surface, and a blade surface formed between the outer surface and the inner wall surface of the needle tip, characterized in that: The blade surface includes a first blade surface and two symmetrical second blade surfaces extending from the distal end of the first blade surface and intersecting with each other. The intersection of the two second blade surfaces forms a blade tip. At least one reflection groove is arranged on the inner wall surface of the needle tip. When there are multiple reflection grooves, the multiple reflection grooves are arranged in sequence from the proximal end to the distal end in the direction of the blade tip. The reflection groove is a multi-faceted pyramid shape, including three or more groove cut surfaces, each groove cut surface forms a reflection surface of the reflection groove, and the distance between the reflection groove closest to the blade tip and the blade tip is ≤0.5mm.

2. The safe and accurate positioning ultrasonic puncture needle according to claim 1, characterized in that: The multiple reflective surfaces in the reflective groove intersect at one point or on a straight line, and the intersection point or intersection line of the multiple reflective surfaces in each reflective groove is located on the same straight line at the blade tip.

3. The safe and accurate positioning ultrasonic puncture needle according to claim 1 is characterized in that: A developing structure is also arranged on the outer peripheral surface of the needle tube.

4. The safe and accurate positioning ultrasonic puncture needle according to claim 3 is characterized in that: The developing structure is a plurality of circular pits arranged on the outer peripheral surface of the needle tube, and the circular pits smoothly transition with the outer peripheral surface of the needle tube.

5. The safe and accurate positioning ultrasonic puncture needle according to claim 4 is characterized in that: The circular pit is a dish-shaped pit with an elliptical outer contour, and the length and width of the dish-shaped pit are both greater than its depth.

6. The safe and accurate positioning ultrasonic puncture needle according to claim 4 or 5, characterized in that: The circular pits are arranged in an array on the outer peripheral surface of the needle tube.

7. The safe and accurate positioning ultrasonic puncture needle according to claim 6, characterized in that: It comprises a plurality of circles of circular pits arranged at equal intervals on the outer circumference of the needle tube, the length distance between two adjacent circles of circular pits is the same, and the circular pits in the same circle are arranged at equal angles on the outer circumference of the needle tube with the axis of the needle tube as the axis.

8. The safe and accurate positioning ultrasonic puncture needle according to claim 1, characterized in that: The inner wall surface of the needle tip is provided with three or more reflection grooves, and the interval distance between two adjacent reflection grooves is the same.

9. The safe and accurate positioning ultrasonic puncture needle according to claim 7, characterized in that: The spacing distance between two adjacent reflection grooves is 1 / 2 of the length distance between two adjacent circles of circular pits.

10. The safe and accurate positioning ultrasonic puncture needle according to claim 7, characterized in that: The reflection groove on the inner wall surface of the needle tip is a triangular pyramid reflection groove or a quadrangular pyramid reflection groove.

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