Puncture needle with outer needle front end through hole ultrasonic imaging structure

Abstract

The utility model discloses a puncture needle with outside needle front end through -hole ultrasonic development structure relates to medical instrument technical field, including outside needle, the inside needle is movably inserted in outside needle, the outside needle is close to needle tip and is provided with reflection round hole in a section, and the ultrasonic wave scatters on the surface of the outside needle of puncture needle, especially at reflection round hole, and the ultrasonic wave is effectively reflected back to ultrasonic probe. Since the reflection round hole is evenly distributed around the circumferential surface of the outside needle, the reflection of the ultrasonic wave is also uniform, which makes the puncture needle present a clear outline under the ultrasonic image. The doctor can accurately judge the position and depth of the puncture needle by observing the ultrasonic image, so as to carry out accurate puncture operation, improve the accuracy and safety of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a puncture needle with an ultrasonic imaging structure having a through hole at the front end of the external needle. Background Technology

[0002] Ultrasound-guided biopsy is a crucial clinical method for obtaining pathological diagnoses. This technique, guided by real-time imaging, significantly improves the accuracy of the puncture while reducing potential complications. However, currently available biopsy needles have some significant shortcomings in ultrasound imaging. Particularly during large-angle punctures or surgeries on obese patients, the needle body and tip often appear blurry, severely impacting the precision and safety of the procedure.

[0003] Traditional puncture needles are typically designed with very smooth surfaces. This design causes the ultrasound waves to be mirror-reflected on the needle surface, resulting in very weak echo signals with strong directionality. This makes it difficult for the probe to effectively receive the ultrasound waves, especially in the area at the tip of the needle where the imaging effect is poor. To address this, we propose a puncture needle with an external needle tip through-hole for ultrasound imaging. Utility Model Content

[0004] The purpose of this invention is to address the problem that traditional puncture needles are typically designed with very smooth surfaces, which causes ultrasonic waves to be mirror-reflected on the needle surface, resulting in very weak echo signals with strong directionality. This makes it difficult for the probe to effectively receive the ultrasonic waves, especially in the area at the tip of the needle, where the imaging effect is poor. This invention provides a puncture needle with an ultrasonic imaging structure featuring an external needle tip-through hole.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A puncture needle with an ultrasonic imaging structure having a through hole at the front end of the outer needle includes an outer needle, an inner needle that is movably inserted into the outer needle, and a reflective circular hole is provided on a section of the outer needle near the needle tip.

[0007] Furthermore, the reflective circular holes are evenly distributed on the circumferential surface of the outer needle.

[0008] Furthermore, a subwavelength reflection unit is provided on the inner side of the outer wall of the outer needle corresponding to the reflection hole. The subwavelength reflection unit includes a periodically arranged slender trapezoidal groove that is radially distributed along the needle body axis. The cross-section of the slender trapezoidal groove is an asymmetrical trapezoid.

[0009] Furthermore, the depth of the elongated trapezoidal groove decreases linearly from 150 μm at the needle tip to 50 μm towards the needle tail.

[0010] Furthermore, the subwavelength reflection unit employs nanoimprint technology to mass-produce subwavelength structures on the needle surface using SiC molds.

[0011] Furthermore, the sidewall inclination angle of the elongated trapezoidal groove is 75° on the incident side and 15° on the exit side.

[0012] Furthermore, the angle of the wall of the elongated trapezoidal groove is achieved using reactive ion etching (RIE) technology, with the slope of the sidewall adjusted by the ratio of SF6 / C4F8 gas.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This invention allows doctors to insert a puncture needle into the patient's body under ultrasound guidance. Ultrasound waves are scattered on the outer surface of the needle, particularly at the reflective orifice, where they are effectively reflected back to the ultrasound probe. Because the reflective orifice is uniformly distributed around the circumference of the outer needle, the ultrasound reflection is also uniform, resulting in a clear outline of the puncture needle under ultrasound imaging. Simultaneously, the subwavelength reflection unit on the outer wall of the needle further enhances the ultrasound reflection effect, making the position and shape of the puncture needle more clearly visible. By observing the ultrasound image, the doctor can accurately determine the position and depth of the puncture needle, thus performing a precise puncture operation. Furthermore, because the depth of the slender trapezoidal groove decreases linearly from the needle tip to the needle tail, the ultrasound energy is reflected more effectively at the needle tip. This helps the doctor determine the depth of the puncture needle based on changes in image brightness during the procedure, further improving the accuracy and safety of the surgery.

[0015] 2. This novel subwavelength reflection unit utilizes an artificial structure to regulate the direction of sound wave propagation, ensuring that 90% of the scattered energy is directed back to the probe, effectively enhancing the imaging effect of ultrasound images. This design not only improves image clarity but also allows doctors to more accurately determine the position and depth of the puncture needle during surgery, thereby further improving the safety and success rate of the procedure. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the outer needle surface of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the subwavelength reflection unit of this utility model.

[0018] Reference numerals: 1. Outer needle; 2. Reflective aperture; 3. Inner needle; 4. Subwavelength reflection unit. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] Please see Figures 1-2 This utility model provides a puncture needle with an ultrasonic imaging structure having a through hole at the front end of the outer needle, including an outer needle 1, an inner needle 3 which is movably inserted into the outer needle 1, and a reflective circular hole 2 is provided on the outer needle 1 near the needle tip.

[0021] In this embodiment, preferably, multiple reflective holes 2 are evenly distributed around the circumferential surface of the outer needle 1. The arrangement of the reflective holes 2 allows the position and shape of the puncture needle to be displayed more clearly under ultrasound imaging, which helps the doctor to accurately locate and operate the puncture needle during the operation, improving the precision and safety of the operation. In addition, the uniform distribution of the reflective holes 2 also ensures the uniformity of the ultrasound image, avoiding image distortion or blurring caused by uneven distribution of the reflective holes 2.

[0022] In this embodiment, preferably, a subwavelength reflection unit 4 is provided on the inner side of the outer wall of the outer needle 1 corresponding to the reflective circular hole 2. The subwavelength reflection unit 4 includes periodically arranged elongated trapezoidal grooves radially distributed along the needle body axis. The cross-section of the elongated trapezoidal grooves is asymmetrical trapezoidal. By using an artificial structure to control the direction of sound wave propagation, 90% of the scattered energy is directed back to the probe, effectively enhancing the imaging effect of ultrasound images. This design not only improves the clarity of the image but also allows doctors to more accurately determine the position and depth of the puncture needle during surgery, thereby further improving the safety and success rate of the surgery.

[0023] In this embodiment, preferably, the depth of the elongated trapezoidal groove linearly decreases from 150 μm at the needle tip to 50 μm towards the needle tail. This allows for more effective reflection of ultrasonic energy at the needle tip, while the reflection intensity gradually weakens as the needle extends, avoiding image confusion caused by excessive reflection. Furthermore, this linearly decreasing design helps the surgeon determine the needle depth based on changes in image brightness during the procedure, improving surgical precision.

[0024] In this embodiment, preferably, the subwavelength reflection unit 4 employs nanoimprint lithography to mass-produce subwavelength structures on the needle surface using a SiC mold. This innovative technology not only ensures the consistency and stability of the subwavelength reflection unit 4 but also significantly improves production efficiency and reduces manufacturing costs.

[0025] In this embodiment, preferably, the sidewall inclination angle of the elongated trapezoidal groove is 75° on the incident side and 15° on the exit side. By finely adjusting parameters such as the depth and sidewall inclination angle of the elongated trapezoidal groove, the ultrasonic imaging effect is further optimized, making the puncture needle more clearly visible under ultrasonic imaging.

[0026] In this embodiment, preferably, the wall angle of the elongated trapezoidal groove is achieved using reactive ion etching (RIE). The slope of the sidewalls is adjusted by controlling the SF6 / C4F8 gas ratio, ensuring the precise angle of the wall of the elongated trapezoidal groove and further improving the efficiency and uniformity of ultrasound reflection. Simultaneously, the fine adjustment of the SF6 / C4F8 gas ratio allows for flexible control of the sidewall slope, meeting the specific requirements for ultrasound imaging effects in different surgical scenarios.

[0027] The working principle and usage of this invention are as follows: During use, the doctor inserts the puncture needle into the patient's body under ultrasound guidance. Ultrasound waves are scattered on the surface of the outer needle 1, especially at the reflective circular hole 2, where they are effectively reflected back to the ultrasound probe. Because the reflective circular hole 2 is uniformly distributed around the circumference of the outer needle 1, the ultrasound reflection is also uniform, resulting in a clear outline of the puncture needle under ultrasound imaging. Simultaneously, the subwavelength reflection unit 4 corresponding to the outer wall of the outer needle 1 further enhances the ultrasound reflection effect, making the position and shape of the puncture needle more clearly visible. By observing the ultrasound image, the doctor can accurately determine the position and depth of the puncture needle, thus performing a precise puncture operation. Furthermore, because the depth of the slender trapezoidal groove decreases linearly from the needle tip to the needle tail, the ultrasound energy is more effectively reflected at the needle tip. This helps the doctor judge the depth of the puncture needle based on changes in image brightness during the procedure, further improving the accuracy and safety of the surgery.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A puncture needle having an outer needle front end through hole ultrasonic visualization structure, characterized by: The device includes an outer needle (1) and an inner needle (3) that is movably inserted inside the outer needle (1). A reflective circular hole (2) is provided near the tip of the outer needle (1). Multiple reflective circular holes (2) are evenly distributed around the circumferential surface of the outer needle (1). A subwavelength reflective unit (4) is provided on the outer wall of the outer needle (1) corresponding to the inner side of the reflective circular hole (2). The subwavelength reflective unit (4) includes a periodically arranged slender trapezoidal groove that is radially distributed along the axial direction of the needle body. The cross-section of the slender trapezoidal groove is an asymmetrical trapezoid.

2. The puncture needle with an ultrasonic imaging structure having a through hole at the front end of the outer needle according to claim 1, characterized in that: The depth of the elongated trapezoidal groove decreases linearly from 150 μm at the needle tip to 50 μm towards the needle tail.

3. A puncture needle with an ultrasonic imaging structure having a through hole at the front end of the outer needle according to claim 2, characterized in that: The subwavelength reflection unit (4) uses nanoimprint technology to replicate the subwavelength structure on the needle surface in batches using a SiC mold.

4. The puncture needle having an outer needle front end through hole ultrasonic visualization structure according to claim 1, characterized in that: The sidewall inclination angle of the elongated trapezoidal groove is 75° on the incident side and 15° on the exit side.

5. The puncture needle having the outer needle front end through hole ultrasonic visualization structure according to claim 4, characterized in that: The angle of the wall of the elongated trapezoidal groove is achieved by reactive ion etching (RIE) process, and the slope of the sidewall is adjusted by the ratio of SF6 / C4F8 gas.

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