Coaxial needle intervention channel establishing needle

Abstract

The utility model discloses a coaxial needle intervenes and establishes a channel needle relates to medical instrument technical field, including needle tube and needle holder, one end of needle tube is fixedly connected with needle holder, and the other end is puncture end, and the outside of needle tube is equipped with three groups gradient spiral groove, and three groups gradient spiral groove interval 120 degree array distribution, and three groups gradient spiral groove axial feed every rotation 1mm in advance, and the depth of groove is from near puncture end 0.15mm to far end 0.25mm linearly increasing, through gradient spiral groove axial pitch change, make the reflection of gradient spiral groove of different positions to ultrasonic wave form different reflection section, improve ultrasonic echo intensity, promote needle tip dynamic tracking ability, through the recess depth linearly increasing, can produce modulated ultrasonic signal when reflecting ultrasonic wave, realize accurate positioning to needle tip position, improve the axial resolution when displaying, make when still keep clear imaging in fat layer thickness three centimeters.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a coaxial needle interventional channel establishment needle. Background Technology

[0002] In interventional medical procedures, puncture needles are commonly used instruments to puncture human tissue for diagnostic or therapeutic operations. When traditional puncture needles are used under ultrasound guidance, the smooth surface of the needle tube results in a small ultrasound reflective surface, leading to poor imaging and making it difficult for doctors to accurately observe the needle's position and shape within the body, increasing the risk and difficulty of the puncture. To enhance the ultrasound imaging effect of puncture needles, some technicians have adopted a scheme of setting multiple dot-shaped grooves on the needle tip surface to enhance echo effects and ultrasound imaging; however, the enhancement effect is not ideal, and clinical feedback has been unsatisfactory. Furthermore, some puncture needles employ a complex spiral continuous groove structure, which improves the effect somewhat but still cannot meet the actual needs of clinicians. Therefore, we propose a coaxial needle interventional channel establishment needle. Utility Model Content

[0003] The purpose of this invention is to address the problem that the smooth surface of the needle results in a small ultrasonic reflective surface, leading to poor imaging and making it difficult for doctors to accurately observe the position and shape of the needle within the body, thus increasing the risk and difficulty of puncture. To enhance the ultrasonic imaging effect of the puncture needle, some technicians have adopted a scheme of setting multiple dot-shaped grooves on the needle tip surface to strengthen the echo effect and ultrasonic imaging; however, the enhancement effect is not good, and clinical feedback is unfavorable. Furthermore, some puncture needles employ a complex spiral continuous groove structure, which improves the effect to some extent but still cannot meet the actual needs of clinicians. This invention provides a coaxial needle for establishing an interventional channel.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A coaxial needle interventional channel establishment needle includes a needle tube and a needle hub. One end of the needle tube is fixedly connected to the needle hub, and the other end is the puncture end. The outer side of the needle tube is provided with three sets of gradient spiral grooves. The three sets of gradient spiral grooves are arranged in an array at 120° intervals. The three sets of gradient spiral grooves advance 1 mm per rotation in the axial feed, and the depth of the grooves increases linearly from 0.15 mm near the puncture end to 0.25 mm distally. The cross-section of the gradient spiral groove is trapezoidal.

[0006] Furthermore, the trapezoidal cross-sectional sidewall inclination angle of the gradient spiral groove is 15°.

[0007] Furthermore, each of the three sets of gradient spiral grooves has a spiral microchannel at an interval, and the spiral microchannel is filled with a contrast agent release strip.

[0008] Furthermore, the contrast agent release strip is made of polyetheretherketone (PEEK), with a width of 0.2 mm and a depth of 0.1 mm, and is filled with contrast agent microcapsules.

[0009] Furthermore, the contrast agent microcapsules are formed by encapsulating sulfur hexafluoride gas (SF6) within a phospholipid membrane, and the diameter of the contrast agent microcapsules is 5 μm.

[0010] Furthermore, the outer wall of the needle is laser-etched with equally spaced piercing depth marks.

[0011] Furthermore, the inner wall of the gradient spiral groove is coated with polyacrylamide hydrogel.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The spiral groove of this invention breaks the traditional axial symmetry, forcing ultrasound to produce nonlinear scattering, expanding the scattering angle to 30°-60°, forming a spiral echo beam, which significantly enhances the imaging effect of the puncture needle under ultrasound. Through the axial pitch change of the gradient spiral groove, the gradient spiral groove at different positions forms different reflection cross sections for the reflection of ultrasound, improving the intensity of the ultrasound echo and enhancing the dynamic tracking ability of the needle tip. Through the linear increase of the groove depth, it can generate modulated ultrasound signals when reflecting ultrasound, achieving precise positioning of the needle tip position, improving the axial resolution during display, and maintaining clear imaging even when the fat layer thickness is three centimeters.

[0014] 2. The trapezoidal cross-section of this utility model can change the ultrasonic wave reflection angle to enhance the contrast of imaging, and the trapezoidal groove can reduce the stress concentration coefficient and improve the structural strength of the needle tube.

[0015] 3. This invention uses a contrast agent release strip within a spiral microchannel to release contrast agent, further enhancing the imaging effect, improving the clarity of the surgical field, and providing doctors with more accurate puncture guidance. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a structural diagram of the gradient spiral groove of this utility model.

[0018] Reference numerals: 1. Gradient spiral groove; 2. Needle tube; 3. Needle seat. 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 coaxial needle intervention to establish a channel needle, including a needle tube 2 and a needle seat 3. One end of the needle tube 2 is fixedly connected to the needle seat 3, and the other end is the puncture end. The needle tube 2 has three sets of gradient spiral grooves 1 on its outer side. The three sets of gradient spiral grooves 1 are arranged in an array at 120° intervals. The three sets of gradient spiral grooves 1 advance 1 mm per rotation in the axial feed, and the depth of the grooves increases linearly from 0.15 mm near the puncture end to 0.25 mm far from the puncture end. The cross-section of the gradient spiral groove 1 is trapezoidal.

[0021] In this embodiment, preferably, the trapezoidal cross-section sidewall inclination angle of the gradient spiral groove 1 is 15°; the trapezoidal cross-section can change the ultrasonic wave reflection angle to enhance the imaging contrast, and the trapezoidal groove can reduce the stress concentration coefficient and improve the structural strength of the needle tube 2.

[0022] In this embodiment, preferably, each of the three sets of gradient spiral grooves 1 has a spiral microchannel at an interval, and the spiral microchannel is filled with a contrast agent release strip. The contrast agent can be released through the contrast agent release strip within the spiral microchannel, further enhancing the imaging effect, improving the clarity of the surgical field, and providing doctors with more accurate puncture guidance.

[0023] In this embodiment, preferably, the contrast agent release strip is made of polyetheretherketone (PEEK), with a width of 0.2 mm and a depth of 0.1 mm, and is filled with contrast agent microcapsules. PEEK is heat-resistant and bio-inert, and will not cause adverse reactions in the human body. Furthermore, the loading amount of the contrast agent microcapsules is moderate, which can meet the imaging requirements during the surgical procedure.

[0024] In this embodiment, preferably, the contrast agent microcapsules are formed by encapsulating sulfur hexafluoride gas (SF6) within a phospholipid membrane, and the diameter of the contrast agent microcapsules is 5 μm. These red blood cell-sized contrast agent microcapsules can avoid the risk of vascular embolism. Under ultrasound, the contrast agent microcapsules vibrate and break apart due to the cavitation effect, releasing SF6. SF6 generates a second harmonic signal at a specific frequency (frequency = fundamental frequency × 2), significantly improving the signal-to-noise ratio. The amount of microcapsule release is positively correlated with the ultrasound power.

[0025] In this embodiment, preferably, the outer wall of the needle tube 2 is laser-etched with equally spaced puncture depth markings. These puncture depth markings on the outer wall of the needle tube 2 allow the doctor to visually understand the puncture depth, avoiding accidental damage to vital tissues.

[0026] In this embodiment, preferably, the inner wall of the gradient spiral groove 1 is coated with polyacrylamide hydrogel. The polyacrylamide hydrogel can act as an ultrasonic coupling layer, with an acoustic impedance matching coefficient >0.9, further improving the imaging effect.

[0027] The working principle and usage process of this utility model are as follows: When the device is in use, the spiral groove breaks the traditional axial symmetry, forcing the ultrasonic waves to produce nonlinear scattering, expanding the scattering angle to 30°-60°, forming a spiral echo beam, which significantly enhances the imaging effect of the puncture needle under ultrasound. Through the axial pitch change of the gradient spiral groove 1, the reflection of ultrasonic waves at different positions of the gradient spiral groove 1 forms different reflection cross sections, improving the ultrasonic echo intensity and enhancing the dynamic tracking capability of the needle tip. Through the linear increase of the groove depth, a modulated ultrasonic signal can be generated when reflecting ultrasonic waves, achieving precise positioning of the needle tip position, improving the axial resolution during display, and maintaining clear imaging even when the fat layer thickness is three centimeters.

[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 coaxial needle intervention access needle, comprising a needle tube (2) and a needle seat (3), one end of the needle tube (2) is fixedly connected with the needle seat (3), and the other end is a puncture end, characterized in that: The needle tube (2) is provided with three sets of gradient spiral grooves (1) on the outside. The three sets of gradient spiral grooves (1) are arranged in an array at 120° intervals. The three sets of gradient spiral grooves (1) advance 1 mm per rotation in the axial feed. The depth of the groove increases linearly from 0.15 mm near the puncture end to 0.25 mm far from the puncture end. The cross-section of the gradient spiral groove (1) is trapezoidal.

2. The coaxial needle intervention access needle of claim 1, wherein: The trapezoidal cross-section sidewall inclination angle of the gradient spiral groove (1) is 15°.

3. The coaxial needle access establishing needle of claim 1, wherein: The three sets of gradient spiral grooves (1) are all provided with spiral microchannels at intervals, and the spiral microchannels are filled with contrast agent release strips.

4. The coaxial needle intervention access needle of claim 3, wherein: The contrast agent release strip is made of polyetheretherketone (PEEK), with a width of 0.2 mm and a depth of 0.1 mm, and is filled with contrast agent microcapsules.

5. The coaxial needle access establishing needle of claim 4, wherein: The contrast agent microcapsules are formed by encapsulating sulfur hexafluoride gas (SF6) within a phospholipid membrane, and the diameter of the contrast agent microcapsules is 5 μm.

6. The coaxial needle access establishing needle of claim 1, wherein: The needle tube (2) has equally spaced laser-etched insertion depth marks on its outer wall.

7. The coaxial needle access establishing needle of claim 1, wherein: The inner wall of the gradient spiral groove (1) is coated with polyacrylamide hydrogel.

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