Nerve block puncture needle for enhancing ultrasonic development effect

Abstract

The invention relates to the technical field of nerve block puncture needles, and discloses a nerve block puncture needle capable of enhancing the ultrasonic development effect, the nerve block puncture needle comprises a connecting part and a puncture needle tube, and a reflection cavity is formed in the tube wall of the puncture needle tube. Under the combined action of the positive pressure and the negative pressure at the two ends of the microbubble solution, gas is continuously dissolved at one end of the gas inlet cavity in the reflection cavity and enters the microbubble solution, bubbles are generated in the microbubble solution, and the bubbles are generated in the microbubble solution due to the negative pressure action at one end of the gas outlet cavity. The microbubble solution in the enrichment cavity is continuously enriched from one end of the air inlet cavity to one end of the air exhaust cavity, so that a large number of bubbles enriched in the enrichment cavity can be obviously displayed under ultrasonic waves, and the position of the needle tip can be confirmed through the flowing and gathering direction of the bubbles, so that the microbubble concentration can be accurately controlled under ultrasonic guidance. The accurate position of the needle tip can be accurately confirmed, puncture operation of medical staff is facilitated, errors caused by nerve block puncture are effectively avoided, and puncture accuracy and safety are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of nerve block puncture needles, in particular to a nerve block puncture needle capable of enhancing ultrasonic imaging effect. Background Art

[0002] Nerve block needles are usually injected around nerve trunks, plexuses, ganglia, etc. to block the connection with the pain nerves in the brain, so that the innervated area is anesthetized, thereby paralyzing the nerves. Nerve block only needs one injection to obtain a larger anesthesia area. Nerve block is already a relatively mature anesthesia technology, which achieves anesthesia by injecting a certain dose of local anesthetic near the peripheral nerves and nerve endings.

[0003] Nerve blocks are also often used as part of combined analgesic techniques, often combined with other analgesic drugs and analgesic methods to control the patient's pain. Nerve blocks have significant advantages over other analgesic methods. First, nerve blocks only anesthetize specific surgical areas and have little effect on other tissue systems in the body, and patients tolerate them well. Second, traditional intravenous analgesics require a large amount of drugs and often cause nausea, vomiting, and respiratory depression.

[0004] In addition, nerve block can not only block sensory nerves, but also relieve muscle spasms caused by pain and improve local vicious cycles. For some patients with local diffuse congestion and edema, nerve block injection can also be used to eliminate edema and promote the absorption of inflammation. Nerve block can cause pathological nerve damage. After injection, there will be a short-term loss of neurological function and numbness and tingling, which can generally be gradually recovered without long-term sequelae. Compared with other analgesic techniques, nerve block has more complete analgesia, higher safety, fewer side effects, and faster postoperative recovery.

[0005] However, in clinical applications, it is found that most clinicians do not choose nerve block as the first choice, whether it is anesthesia or analgesia. The main reason is that the current nerve block puncture needle can only inject drugs at the tip, which requires a very high position of the needle tip for puncture. It requires very precise puncture to accurately inject the drug solution into the nerve to be blocked, which increases the difficulty and time of puncture.

[0006] At present, with the application of ultrasound and other technologies to the nerve block technology of clinical anesthesia, it is now possible to use a puncture needle to approach the target nerve under ultrasound guidance, and a thin and soft catheter can be placed around the target nerve through the puncture needle. By using ultrasound, anesthesiologists can locate the nerve more accurately, guide the puncture needle in real time, observe the diffusion of the drug solution in real time, avoid damage to other organs, and increase the success rate of nerve block while reducing the incidence of complications.

[0007] In the prior art, during the process of ultrasound-guided nerve block puncture, the most critical point that affects the success and accuracy of the nerve block puncture is the positioning problem of the needle tip of the nerve block puncture needle under ultrasound guidance. Because the needle tip needs to pierce human tissue, the needle tip is also prone to piercing other parts. The positioning method in the prior art is usually to add a structure that can enhance the ultrasonic reflection to the entire needle tube. However, in this method, due to the small position of the needle tip, the actual reflection structure cannot be clearly displayed within the display range of the ultrasound, which will still cause errors in the nerve block puncture under ultrasound guidance, affecting the accuracy and safety of the nerve block puncture.

[0008] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0009] In view of the deficiencies of the prior art, the present invention provides a nerve block puncture needle with enhanced ultrasonic imaging effect.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0011] A nerve block puncture needle for enhancing ultrasonic imaging effect, comprising a connecting part and a puncture needle tube, wherein the puncture needle tube has a puncture cavity in the center, the puncture needle tube comprises a needle surface side and a needle back side, and a needle tip is arranged at one end of the needle surface side of the puncture needle tube away from the connecting part; a reflection cavity is opened inside the tube wall of the puncture needle tube, the reflection cavity comprises an enrichment cavity, an air intake cavity and an exhaust cavity, and the two ends of the enrichment cavity are respectively connected with the air intake cavity and the exhaust cavity; the enrichment cavity is arranged on the puncture needle tube and located inside the tube wall of the needle tip, and the air intake cavity is arranged on the puncture needle tube and located inside the needle tip The exhaust cavity is arranged inside the tube wall on the face side of the puncture needle tube and is located inside the tube wall on the back side of the needle; the end of the puncture needle tube close to the connecting part is respectively connected with an air inlet interface and an exhaust interface, the air inlet interface is connected with an end of the air inlet cavity away from the enrichment cavity, and the exhaust interface is connected with an end of the exhaust cavity away from the enrichment cavity; the interior of the reflection cavity is perfused with a microbubble solution, a positive pressure is provided to the reflection cavity from the air inlet interface, and a negative pressure is provided to the interior of the reflection cavity from the exhaust interface, so that the ultrasonic microbubbles generated by the microbubble solution can be enriched inside the enrichment cavity.

[0012] Preferably, the air intake cavity points from one end close to the enrichment cavity to one end of the air intake interface, and the cross-sectional area of ​​the air intake cavity decreases successively; the exhaust cavity points from one end close to the enrichment cavity to one end of the exhaust interface, and the cross-sectional area of ​​the exhaust cavity decreases successively.

[0013] Preferably, an air intake channel is arranged between the air intake cavity and the enrichment cavity, and two exhaust channels are arranged between the exhaust cavity and the enrichment cavity, and the two exhaust channels are arranged on both sides of the air intake channel respectively; the minimum amount of microbubble solution injected into the reflection cavity can also fill the entire enrichment cavity, and the air intake channel and the two exhaust channels are isolated by the microbubble solution.

[0014] Preferably, the side wall of the enrichment cavity is provided with a fold line pattern, and the fold line pattern is composed of a plurality of fold lines connected end to end in sequence; from the tip far away from the needle tip to the tip close to the needle tip, the angle between two adjacent fold lines of the fold line pattern decreases successively, and the fold line density of the fold line pattern gradually increases.

[0015] Preferably, the inner wall of the air intake cavity is provided with several groups of air intake mark groups, and the distances between the several groups of air intake mark groups are equal; each group of the air intake mark groups includes several air intake marks, and the number of air intake marks included in each group of the air intake mark groups decreases successively from the direction close to the enrichment cavity to the direction close to the air intake interface.

[0016] Preferably, the inner wall of the exhaust cavity is provided with several groups of exhaust mark groups, and the distances between the several groups of exhaust mark groups are equal; each group of the exhaust mark groups includes several exhaust marks, and the number of exhaust marks included in each group of the exhaust mark groups decreases successively from the direction close to the enrichment cavity to the direction close to the exhaust interface.

[0017] Preferably, the outer wall of the puncture needle tube is provided with a plurality of observation rings, and the spacing between two adjacent observation rings is equal; the distance between the first observation ring close to the needle tip and the tip of the needle tip is also equal to the spacing between two adjacent observation rings.

[0018] Preferably, the air inlet interface and the exhaust interface are respectively connected to the air pump through connecting tubes, and the air pump can provide positive pressure to the reflection cavity from the air inlet interface through the connecting tubes, and at the same time provide negative pressure to the inside of the reflection cavity from the exhaust interface, so as to enrich ultrasonic microbubbles inside the microbubble solution in the enrichment cavity; the air inlet interface and the exhaust interface can also be respectively connected to the liquid pump through connecting tubes, and before the puncture operation, the liquid pump can inject the microbubble solution into the inside of the reflection cavity from the air inlet interface through the connecting tube; after the puncture operation, the liquid pump can also extract the microbubble solution inside the reflection cavity from the exhaust interface through the connecting tube.

[0019] Compared with the prior art, the present invention provides a nerve block puncture needle with enhanced ultrasound imaging effect, which has the following beneficial effects:

[0020] 1. The nerve block puncture needle with enhanced ultrasonic imaging effect provides negative pressure to one end of the exhaust cavity inside the reflection cavity by drawing air through the exhaust interface. Under the combined action of positive pressure and negative pressure at both ends of the microbubble solution, the gas continuously dissolves into the microbubble solution at one end of the intake cavity inside the reflection cavity, and generates bubbles in the microbubble solution. Due to the negative pressure at one end of the exhaust cavity, the bubbles continuously enrich in the microbubble solution of the enrichment cavity from one end of the intake cavity to one end of the exhaust cavity, so that a large number of bubbles enriched in the enrichment cavity can be significantly displayed under ultrasound, and the position of the needle tip can be confirmed by the flow convergence direction of the bubbles, so that under the guidance of ultrasound, the exact position of the needle tip can be accurately confirmed, which is convenient for the puncture operation of medical personnel, effectively avoiding errors in nerve block puncture under ultrasound guidance, and ensuring the accuracy and safety of nerve block puncture.

[0021] 2. This nerve block puncture needle with enhanced ultrasonic imaging effect can effectively provide a larger contact surface between the gas and the microbubble solution by gradually expanding the cross-sectional area of ​​the air intake cavity toward one end of the enrichment cavity, thereby increasing the dissolution rate of the gas at the interface of the microbubble solution, fully ensuring the stock of ultrasonic microbubbles inside the microbubble solution, and effectively replenishing the gas of the ultrasonic microbubbles lost from the negative pressure interface at the other end. Similarly, by gradually expanding the cross-sectional area of ​​the exhaust cavity toward one end of the enrichment cavity, a larger negative pressure interface can be effectively provided, so that the ultrasonic microbubbles inside the microbubble solution in the enrichment cavity are enriched from one end of the positive pressure interface to one end of the negative pressure interface, and the ultrasonic microbubbles inside the microbubble solution can be dynamically replenished by the gas at the positive pressure interface, effectively ensuring the enrichment direction and enrichment amount of the ultrasonic microbubbles inside the microbubble solution, and effectively providing the needle tip corresponding to the enrichment cavity of the nerve block puncture needle with an imaging intensity under ultrasound, which can effectively assist the puncture process of the nerve block puncture needle.

[0022] 3. The nerve block puncture needle with enhanced ultrasound imaging effect can reflect and develop under ultrasound by setting the fold line pattern, and the angle between two adjacent fold lines of the fold line pattern is reduced successively from the tip far from the needle tip to the tip close to the needle tip, and the fold line density of the fold line pattern is gradually increased, so that medical personnel can assist in guiding the position of the needle tip according to the density of the fold line pattern, so that medical personnel can judge the position of the needle tip under ultrasound by the enrichment position of the ultrasonic microbubbles, the enrichment direction of the ultrasonic microbubbles and the density of the fold line pattern, and can fully and effectively show the position of the needle tip under ultrasound, so as to better perform the nerve block puncture operation under ultrasound; and by moving from the direction close to the enrichment cavity to the direction close to the air inlet interface, The number of air intake marks contained in each air intake mark group decreases successively from the direction close to the enrichment cavity to the direction close to the exhaust interface, and in actual use, the shapes of the air intake marks and the exhaust marks are different, so that medical personnel can recognize the shape of the marks under ultrasound, which can facilitate medical personnel to distinguish the surface layer under ultrasound imaging at this time, and by comparing the number of air intake marks of two adjacent air intake mark groups within the same size range, or comparing the number of exhaust marks of two adjacent exhaust mark groups, the direction of the needle tip and the distance from the current ultrasound observation range can be quickly determined, and the needle tip of the nerve block puncture operation under ultrasound can be quickly positioned, saving the time of the puncture operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the three-dimensional structural schematic diagrams of a nerve block puncture needle with enhanced ultrasonic imaging effect according to the present invention;

[0024] Figure 2 This is a second schematic diagram of the three-dimensional structure of a nerve block puncture needle with enhanced ultrasonic imaging effect according to the present invention;

[0025] Figure 3 The third schematic diagram of the three-dimensional structure of a nerve block puncture needle with enhanced ultrasonic imaging effect according to the present invention;

[0026] Figure 4 This is one of the three-dimensional structural schematic diagrams of the reflective cavity of the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified view of part A;

[0028] Figure 6 The second schematic diagram of the three-dimensional structure of the reflective cavity of the present invention;

[0029] Figure 7 The third schematic diagram of the three-dimensional structure of the reflective cavity of the present invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged view of part B.

[0031] In the figure: 1. connecting part; 11. handle; 12. connecting interface; 2. puncture needle tube; 21. needle surface side; 22. needle back side; 23. needle tip; 24. observation ring; 3. puncture cavity; 4. reflection cavity; 41. enrichment cavity; 411. broken line pattern; 42. air intake cavity; 421. air intake channel; 422. air intake marking group; 43. exhaust cavity; 431. exhaust channel; 432. exhaust marking group; 5. air intake interface; 6. exhaust interface. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a nerve block puncture needle with enhanced ultrasonic imaging effect.

[0034] Embodiment 1: The nerve block puncture needle with enhanced ultrasonic imaging effect in this embodiment includes a connecting part 1 and a puncture needle tube 2 (when in use, there is a completely penetrating hollow part in the center of the connecting part 1 and the puncture needle tube 2, namely, a puncture cavity 3, which is used for drug injection for nerve block operation, and the connecting part 1 has an opening in the center away from the puncture needle tube 2, and the opening of the connecting part 1 can be connected and sealed with the extension tube), the puncture needle tube 2 has a puncture cavity 3 in the center, the puncture needle tube 2 includes a needle surface side 21 and a needle back side 22, and a needle tip 23 is provided at one end of the needle surface side 21 of the puncture needle tube 2 away from the connecting part 1; a reflection cavity 4 is opened inside the tube wall of the puncture needle tube 2, and the position of the reflection cavity 4 is located at the needle tip 23. During production, a microbubble solution has been pre-filled and sealed inside the reflection cavity 4;

[0035] During specific use, the microbubble solution inside the reflection cavity 4 at the needle tip 23 can be enhanced and developed under ultrasound, so that the position of the needle tip 23 can be significantly observed under ultrasound due to the enhanced reflection effect of the microbubble solution, and the nerve block puncture operation under ultrasound can be better performed.

[0036] Embodiment 2:

[0037] In the actual application of the nerve block puncture needle with enhanced ultrasonic imaging effect in the first embodiment, because the interval between the packaging production time and the actual use time is not fixed, the microbubbles generated in the microbubble solution encapsulated in the reflection cavity 4 disappear over time, and there is a trend that the enhanced imaging effect decreases with the use time;

[0038] Therefore, in the second embodiment, a nerve block puncture needle with enhanced ultrasonic imaging effect is provided, comprising: a connecting part 1 and a puncture needle tube 2, wherein the puncture needle tube 2 has a puncture cavity 3 in the center, the puncture needle tube 2 comprises a needle surface side 21 and a needle back side 22, and a needle tip 23 is arranged at the end of the needle surface side 21 of the puncture needle tube 2 away from the connecting part 1; a reflection cavity 4 is opened inside the tube wall of the puncture needle tube 2, and the reflection cavity 4 comprises an enrichment cavity 41 and an air intake cavity 42, and the enrichment cavity 41 is connected to the air intake cavity 42; the enrichment cavity 41 is arranged inside the tube wall of the puncture needle tube 2 and located at the needle tip 23, and the air intake cavity 42 is arranged inside the tube wall of the puncture needle tube 2 and located at the needle surface side 21; an air intake interface 5 is respectively connected to one end of the puncture needle tube 2 close to the connecting part 1, and the air intake interface 5 is connected to the end of the air intake cavity 42 away from the enrichment cavity 41;

[0039] From the air inlet interface 5, a microbubble solution can be perfused into the enrichment cavity 41 through the air inlet cavity 42. The perfusion of the microbubble solution at this time can be achieved by a syringe, a liquid pump, etc.;

[0040] During specific use, a microbubble solution can be temporarily perfused from the air inlet interface 5 through the air inlet cavity 42 into the enrichment cavity 41. During a relatively short period of nerve block operation, the microbubble solution is temporarily injected into the enrichment cavity 41. When in use, the air inlet interface 5 is sealed (cannula treatment) to confine the microbubble solution to the air inlet cavity 42 and the enrichment cavity 41, thereby enhancing the ultrasonic imaging effect at the needle tip 23 through the microbubble solution. In addition, by temporarily perfusing the microbubble solution, the disappearance of microbubbles in the microbubble solution caused by long-term perfusion can be avoided, thereby ensuring that the temporarily perfused microbubble solution can significantly enhance the ultrasonic imaging effect, thereby facilitating the nerve block operation process in a short period of time.

[0041] Embodiment three:

[0042] In actual application of the nerve block puncture needle with enhanced ultrasound imaging effect in Example 2, due to the uncertain time of nerve block puncture, the microbubbles in the microbubble solution may disappear during the operation, and the effect of enhanced ultrasound imaging may be reduced;

[0043] Therefore, please refer to Figure 1-Figure 8In the third embodiment, a nerve block puncture needle with enhanced ultrasonic imaging effect is provided, comprising: a connecting part 1 and a puncture needle tube 2, wherein the puncture needle tube 2 has a puncture cavity 3 in the center, the puncture needle tube 2 comprises a needle surface side 21 and a needle back side 22, and a needle tip 23 is arranged at one end of the needle surface side 21 of the puncture needle tube 2 away from the connecting part 1; a reflection cavity 4 is opened inside the tube wall of the puncture needle tube 2, and the reflection cavity 4 comprises an enrichment cavity 41, an air intake cavity 42 and an exhaust cavity 43, and the two ends of the enrichment cavity 41 are respectively connected to the air intake cavity 42 and the exhaust cavity 43; the enrichment cavity 41 is arranged on the tube wall of the puncture needle tube 2 and is located inside the needle tip 23, and the air intake cavity 42 is arranged The puncture needle tube 2 is arranged inside the tube wall on the needle surface side 21, and the exhaust cavity 43 is arranged inside the tube wall on the needle back side 22 of the puncture needle tube 2; the end of the puncture needle tube 2 close to the connecting part 1 is respectively connected with an air inlet interface 5 and an exhaust interface 6, the air inlet interface 5 is connected with an end of the air inlet cavity 42 away from the enrichment cavity 41, and the exhaust interface 6 is connected with an end of the exhaust cavity 43 away from the enrichment cavity 41; the reflection cavity 4 is perfused with a microbubble solution, a positive pressure is provided to the reflection cavity 4 from the air inlet interface 5, and a negative pressure is provided to the reflection cavity 4 from the exhaust interface 6, so that the ultrasonic microbubbles generated by the microbubble solution can be enriched inside the enrichment cavity 41.

[0044] When in use, firstly, a certain amount of microbubble solution is injected into the reflection cavity 4 through the air inlet interface 5 (in actual use, the minimum amount of microbubble solution injected into the reflection cavity 4 needs to be able to fill the entire enrichment cavity 41, and the air inlet channel 421 and the two exhaust channels 431 are isolated by the microbubble solution), then, the air inlet interface 5 and the exhaust interface 6 are respectively connected to the air pump, and gas is injected into one end of the air inlet cavity 42 of the reflection cavity 4 through the air inlet interface 5 (the gas is consistent with the gas composition that can be produced by the microbubble solution), to provide positive pressure to the reflection cavity 4, and to provide negative pressure to one end of the exhaust cavity 43 inside the reflection cavity 4 through the exhaust interface 6, under the combined action of the positive pressure and the negative pressure at both ends of the microbubble solution (the action of the positive pressure and the negative pressure is not enough to drive The microbubble solution moves inside the reflecting cavity 4), and the gas continuously dissolves into the microbubble solution at one end of the air inlet cavity 42 inside the reflecting cavity 4, and generates bubbles in the microbubble solution. Due to the negative pressure at one end of the exhaust cavity 43, the bubbles are continuously enriched in the microbubble solution of the enrichment cavity 41 from one end of the air inlet cavity 42 to one end of the exhaust cavity 43, so that a large number of bubbles enriched in the enrichment cavity 41 can be significantly displayed under ultrasound, and the position of the needle tip 23 can be confirmed by the flow convergence direction of the bubbles, so that under the guidance of ultrasound, the exact position of the needle tip 23 can be accurately confirmed, which is convenient for the puncture operation of medical personnel, effectively avoiding errors in nerve block puncture under ultrasound guidance, and ensuring the accuracy and safety of nerve block puncture.

[0045] When in use, the gas injected into the air inlet cavity 42 end of the reflection cavity 4 through the air inlet interface 5 is a gas that can generate ultrasonic microbubbles in the ultrasonic microbubble solution, wherein the gas can also enhance the ultrasonic imaging effect (the ultrasonic contrast agent used in this embodiment can use the gas with high ultrasonic reflectivity in the Chinese patent with publication number CN112914697A, which can enhance the ultrasonic imaging effect). Under the action of the gas, in the microbubble solution of the enrichment cavity 41, the effect of enriching the microbubbles in the microbubble solution from the air inlet cavity 42 end to the exhaust cavity 43 end is enhanced, and through the action of the air pump, the gas is kept to completely fill the air inlet cavity 42 and the exhaust cavity 43 that are not filled with the microbubble solution. While ensuring the ultrasonic imaging effect at the needle tip 23, the ultrasonic imaging effects of the needle surface side 21 and the needle back side 22 corresponding to the air inlet cavity 42 and the exhaust cavity 43 respectively can also be improved to a certain extent, thereby improving the observability of the nerve block puncture process.

[0046] In actual use, the above-mentioned microbubble solution can use a microbubble ultrasound contrast agent, which is divided into microbubble ultrasound contrast agents, phospholipid ultrasound contrast agents, protein ultrasound contrast agents, etc. Among them, microbubble ultrasound contrast agents: microbubble ultrasound contrast agents are microcapsules made of gas and low molecular weight polyethylene glycol, which can increase the echo difference between tissues and improve the contrast of ultrasound images. This type of contrast agent has a high degree of safety and will not cause allergic reactions; phospholipid ultrasound contrast agents: phospholipid ultrasound contrast agents are microbubbles formed by a mixture of phospholipids and low molecular weight gases, with high biocompatibility and long blood circulation time; protein ultrasound contrast agents: protein ultrasound contrast agents are microbubbles formed by a mixture of proteins and gases, with high biocompatibility and long blood circulation time. The ultrasound contrast agent used in this embodiment is a microbubble type (the ultrasound contrast agent used in this embodiment can be a polyurethane foam polymer in a Chinese patent with publication number CN114191570A, which can enhance the imaging effect under ultrasound), and in actual use, other types of solutions that can produce a large number of microbubbles under ultrasound can also be used.

[0047] For further information, see Figure 1 , Figure 4-Figure 8 The air intake cavity 42 points from one end close to the enrichment cavity 41 to one end of the air intake interface 5, and the cross-sectional area of ​​the air intake cavity 42 decreases successively; the exhaust cavity 43 points from one end close to the enrichment cavity 41 to one end of the exhaust interface 6, and the cross-sectional area of ​​the exhaust cavity 43 decreases successively.

[0048] An air intake channel 421 is arranged between the air intake cavity 42 and the enrichment cavity 41, and two exhaust channels 431 are arranged between the exhaust cavity 43 and the enrichment cavity 41. The two exhaust channels 431 are arranged on both sides of the air intake channel 421 respectively; the minimum amount of microbubble solution injected into the reflection cavity 4 is also able to fill the entire enrichment cavity 41, and the air intake channel 421 and the two exhaust channels 431 are isolated by the microbubble solution.

[0049] Therefore, when in use, the amount of microbubble solution injected into the entire reflection cavity 4 can completely fill the entire enrichment cavity 41, and in actual use, the microbubble solution should completely cover the air inlet channel 421 and the two exhaust channels 431, so that when the entire nerve block puncture needle is offset to a certain extent, the enrichment cavity 41 can be completely filled with the microbubble solution;

[0050] When in use, by gradually increasing the cross-sectional area of ​​the air inlet cavity 42 toward one end of the enrichment cavity 41, a larger contact surface between the gas and the microbubble solution can be effectively provided, the dissolution rate of the gas at the interface of the microbubble solution can be increased, the stock of ultrasonic microbubbles inside the microbubble solution can be fully guaranteed, and the gas of the ultrasonic microbubbles lost from the negative pressure interface at the other end can be effectively replenished. Similarly, by gradually increasing the cross-sectional area of ​​the exhaust cavity 43 toward one end of the enrichment cavity 41, a larger negative pressure interface can be effectively provided, so that the ultrasonic microbubbles existing in the microbubble solution of the enrichment cavity 41 are enriched from one end of the positive pressure interface to one end of the negative pressure interface, and the ultrasonic microbubbles inside the microbubble solution can be dynamically replenished by the gas at the positive pressure interface, effectively ensuring the enrichment direction and enrichment amount of the ultrasonic microbubbles inside the microbubble solution, and effectively providing the needle tip 23 corresponding to the enrichment cavity 41 of the nerve block puncture needle. The intensity of development under ultrasound can effectively assist the puncture process of the nerve block puncture needle.

[0051] For further information, see Figure 1 , Figure 4-Figure 8 The side wall of the enrichment cavity 41 is provided with a fold line pattern 411, and the fold line pattern 411 is composed of a plurality of fold lines connected end to end in sequence; from the tip far away from the needle tip 23 to the tip close to the needle tip 23, the angle between two adjacent fold lines of the fold line pattern 411 decreases successively, and the fold line density of the fold line pattern 411 gradually increases.

[0052] The inner wall of the air intake cavity 42 is provided with several groups of air intake mark groups 422, and the distances between the several groups of air intake mark groups 422 are equal; each group of air intake mark groups 422 includes several air intake marks, and the number of air intake marks included in each group of air intake mark groups 422 decreases successively from the direction close to the enrichment cavity 41 to the direction close to the air intake interface 5.

[0053] The inner wall of the exhaust cavity 43 is provided with a plurality of exhaust mark groups 432, and the distances between the plurality of exhaust mark groups 432 are equal; each exhaust mark group 432 includes a plurality of exhaust marks, and the number of exhaust marks included in each exhaust mark group 432 decreases successively from the direction close to the enrichment cavity 41 to the direction close to the exhaust interface 6.

[0054] When in use, the fold line pattern 411 is set so that the fold line pattern 411 can be reflected and developed under ultrasound, and the angle between two adjacent fold lines of the fold line pattern 411 is reduced successively from the tip far from the needle tip 23 to the tip close to the needle tip 23, and the fold line density of the fold line pattern 411 is gradually increased, so that medical personnel can assist in guiding the position of the needle tip 23 according to the density of the fold line pattern 411, so that medical personnel can judge the position of the needle tip 23 under ultrasound by the enrichment position and enrichment direction of the ultrasonic microbubbles and the density of the fold line pattern 411, and can fully and effectively show the position of the needle tip 23 under ultrasound, so as to better perform the nerve block puncture operation under ultrasound;

[0055] In actual use, the number of intake marks included in each intake mark group 422 decreases from the direction close to the enrichment cavity 41 to the direction close to the intake interface 5, and the number of exhaust marks included in each exhaust mark group 432 decreases from the direction close to the enrichment cavity 41 to the direction close to the exhaust interface 6. In actual use, the shapes of the intake mark and the exhaust mark are different (one can be a triangle and the other can be a square, etc.), so that medical personnel can recognize the shape of the mark under ultrasound, which can facilitate medical personnel to distinguish the ultrasound imaging at this time. The lower surface layer (the air intake cavity 42 is arranged on the puncture needle tube 2 and is located inside the tube wall on the needle surface side 21, and the air exhaust cavity 43 is arranged on the puncture needle tube 2 and is located inside the tube wall on the needle back side 22), and by comparing the number of air intake marks of two adjacent air intake mark groups 422 within the same size range, or comparing the number of exhaust marks of two adjacent exhaust mark groups 432, the direction of the needle tip 23 and the distance from the current ultrasonic observation range can be quickly determined, and the needle tip 23 of the nerve block puncture operation under ultrasound can be quickly positioned, saving the time of the puncture operation.

[0056] For further information, see Figure 1-Figure 3 The outer wall of the puncture needle tube 2 is provided with a plurality of observation rings 24 , and the distance between two adjacent observation rings 24 is equal; the distance between the first observation ring 24 close to the needle tip 23 and the tip of the needle tip 23 is also equal to the distance between two adjacent observation rings 24 .

[0057] In actual use, digital markings can be made on the observation ring 24 to facilitate reading by medical personnel. At the same time, by setting the number of observation rings 24, medical personnel can calculate the number of observation rings 24 of the external puncture needle tube 2 to obtain the length of the needle tip 23 inserted into the body, which can facilitate the search for the needle tip 23 under ultrasound, and can also estimate the puncture position by the number of observation rings 24 of the external puncture needle tube 2 and the direction of puncture.

[0058] For further information, see Figure 1-Figure 3 The air inlet interface 5 and the exhaust interface 6 are respectively connected to the air pump through connecting pipes, and the air pump can provide positive pressure to the reflection cavity 4 from the air inlet interface 5 through the connecting pipes, and provide negative pressure to the inside of the reflection cavity 4 from the exhaust interface 6, so as to enrich the ultrasonic microbubbles in the microbubble solution of the enriched cavity 41; the air inlet interface 5 and the exhaust interface 6 can also be connected to the liquid pump through connecting pipes, and before the puncture operation, the liquid pump can inject the microbubble solution into the reflection cavity 4 from the air inlet interface 5 through the connecting pipe; after the puncture operation, the liquid pump can also extract the microbubble solution in the reflection cavity 4 from the exhaust interface 6 through the connecting pipe, so that the microbubble solution can be injected and extracted into the reflection cavity 4 through the air inlet interface 5 and the exhaust interface 6, and through the setting of the connecting pipe, the nerve block puncture needle can be set to be disposable, and the air inlet interface 5 and the exhaust interface 6 are set at the end away from the needle tip 23 to avoid contamination of the air pump and the liquid pump, so that they can be used cyclically.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nerve block puncture needle with enhanced ultrasound imaging effect, characterized in that: include: A connecting portion (1) and a puncture needle tube (2), wherein the puncture needle tube (2) has a puncture cavity (3) in the center, the puncture needle tube (2) comprises a needle face side (21) and a needle back side (22), and a needle tip (23) is provided at one end of the needle face side (21) of the puncture needle tube (2) away from the connecting portion (1); A reflection cavity (4) is provided inside the tube wall of the puncture needle tube (2), and the reflection cavity (4) comprises an enrichment cavity (41), an air intake cavity (42) and an exhaust cavity (43), and two ends of the enrichment cavity (41) are respectively connected to the air intake cavity (42) and the exhaust cavity (43); The enrichment cavity (41) is arranged on the puncture needle tube (2) and is located inside the tube wall of the needle tip (23); the air intake cavity (42) is arranged on the puncture needle tube (2) and is located inside the tube wall of the needle surface side (21); and the exhaust cavity (43) is arranged on the puncture needle tube (2) and is located inside the tube wall of the needle back side (22); An end of the puncture needle tube (2) close to the connecting portion (1) is respectively connected to an air inlet interface (5) and an air outlet interface (6), the air inlet interface (5) is in communication with an end of the air inlet cavity (42) away from the enrichment cavity (41), and the air outlet interface (6) is in communication with an end of the air outlet cavity (43) away from the enrichment cavity (41); The reflection cavity (4) is infused with a microbubble solution, a positive pressure is provided to the reflection cavity (4) from the air inlet interface (5), and a negative pressure is provided to the reflection cavity (4) from the air outlet interface (6), so that the ultrasonic microbubbles generated by the microbubble solution can be enriched in the enrichment cavity (41).

2. A nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: The air intake cavity (42) points from one end close to the enrichment cavity (41) to one end of the air intake interface (5), and the cross-sectional area of ​​the air intake cavity (42) gradually decreases; The exhaust cavity (43) points from one end close to the enrichment cavity (41) to one end of the exhaust interface (6), and the cross-sectional area of ​​the exhaust cavity (43) decreases gradually.

3. The nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: An air intake channel (421) is provided between the air intake cavity (42) and the enrichment cavity (41), and two exhaust channels (431) are provided between the exhaust cavity (43) and the enrichment cavity (41), and the two exhaust channels (431) are respectively provided on both sides of the air intake channel (421); The minimum amount of the microbubble solution poured into the reflection cavity (4) is also able to fill the entire enrichment cavity (41), isolating the air intake channel (421) from the two exhaust channels (431) by the microbubble solution.

4. A nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: The side wall of the enrichment cavity (41) is provided with a fold line pattern (411), and the fold line pattern (411) is composed of a plurality of fold lines connected end to end in sequence; From the tip away from the needle tip (23) to the tip close to the needle tip (23), the angle between two adjacent fold lines of the fold line pattern (411) decreases successively, and the fold line density of the fold line pattern (411) increases gradually.

5. The nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: The inner wall of the air intake cavity (42) is provided with a plurality of groups of air intake mark groups (422), and the distances between the plurality of groups of air intake mark groups (422) are equal; Each of the air intake mark groups (422) includes a plurality of air intake marks, and the number of air intake marks included in each of the air intake mark groups (422) decreases in sequence from the direction close to the enrichment cavity (41) to the direction close to the air intake interface (5).

6. The nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: The inner wall of the exhaust cavity (43) is provided with a plurality of exhaust mark groups (432), and the distances between the plurality of exhaust mark groups (432) are equal; Each of the exhaust mark groups (432) includes a plurality of exhaust marks, and the number of exhaust marks included in each of the exhaust mark groups (432) decreases in sequence from the direction close to the enrichment cavity (41) to the direction close to the exhaust interface (6).

7. The nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: The outer wall of the puncture needle tube (2) is provided with a plurality of observation rings (24), and the spacing between two adjacent observation rings (24) is equal; The distance between the first observation ring (24) close to the needle tip (23) and the tip of the needle tip (23) is also equal to the distance between two adjacent observation rings (24).

8. The nerve block puncture needle with enhanced ultrasound imaging effect according to claim 1, characterized in that: The air inlet interface (5) and the air outlet interface (6) are respectively connected to an air pump via connecting pipes, and the air pump can provide positive pressure from the air inlet interface (5) to the reflection cavity (4) through the connecting pipes, and simultaneously provide negative pressure from the air outlet interface (6) to the inside of the reflection cavity (4), so as to enrich ultrasonic microbubbles in the microbubble solution in the enrichment cavity (41); The air inlet interface (5) and the air outlet interface (6) can also be connected to a liquid pump via connecting tubes respectively. Before the puncture operation, the liquid pump can inject a microbubble solution into the interior of the reflection cavity (4) from the air inlet interface (5) via the connecting tube. After the puncture operation, the liquid pump can also extract the microbubble solution from the interior of the reflection cavity (4) from the air outlet interface (6) via the connecting tube.

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