Arteriovenous puncture needle

Abstract

The invention relates to an arteriovenous puncture needle, and belongs to the field of medical instruments. Comprising a three-way pipeline, a puncture steel needle, an indwelling needle, a rotary fixing assembly, a holding assembly, an isolation plug, an extension tube, a heparin cap, a protective sleeve, a hemostatic clip and a connecting base. The puncture steel needle penetrates through the remaining needle, the holding assembly is connected with the puncture steel needle, the rotary fixing assembly is rotatably arranged on the side wall of the three-way pipeline in a sleeving mode and connected with the holding assembly in a clamped mode, and the heparin cap is detachably connected with the connecting base or the three-way pipeline. The puncture steel needle hollow section is of a tubular structure coaxially connected with the puncture steel needle solid section, a puncture steel needle opening is formed in the side wall of the side, connected with the puncture steel needle solid section, of the puncture steel needle hollow section, the puncture steel needle opening is a through hole, and the puncture steel needle opening is formed in the junction of three channels in the three-way pipeline. The blood flow volume can be judged easily, the puncture needle is prevented from shaking to puncture the blood vessel wall, and the blood return condition can be judged timely and rapidly after the puncture steel needle punctures the blood vessel.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an arteriovenous puncture needle. Background Art

[0002] The blood flow rate of extracorporeal circulation in blood purification therapy reaches 200 - 400 ml per minute. Clinically, an arteriovenous puncture needle (steel needle) is conventionally used for arteriovenous fistula puncture. Since each dialysis session takes 4 - 5 hours, when the punctured limb of the patient moves during dialysis, an ordinary arteriovenous puncture needle is likely to pierce through the blood vessel, damage the blood vessel wall, resulting in adverse consequences such as hematoma and blood loss.

[0003] Clinically, some hospitals have been using indwelling needles for arteriovenous fistula for arteriovenous fistula puncture. However, currently, straight indwelling needles are more common. The metal needle of a straight indwelling needle is relatively long, and the needle tube is circular, without a fixed wing, a needle holder, or a hemostatic clip. It is not convenient to externally connect a syringe to aspirate blood during the puncture process, and it is impossible to judge or adjust the position of the puncture needle in the blood vessel according to the blood flow rate, thus there is a hidden danger of blood loss; while the indwelling needles commonly used for clinical intravenous infusion are relatively small, the needle tube is relatively thin, and the blood flow rate during aspiration is small, which is only suitable for clinical infusion and not suitable for the treatment of patients with a relatively large demand for blood flow, such as the arteriovenous fistula that needs to be punctured for the treatment of hemodialysis patients, and cannot reach the blood flow rate required for dialysis treatment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide an arteriovenous puncture needle to solve the above problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: An arteriovenous puncture needle, comprising: a three-way pipe, a puncture steel needle, an indwelling needle, a rotary fixing component, a holding component, a septum, an extension tube, a heparin cap, a protective sleeve, a hemostatic clip and a connecting seat; the puncture steel needle passes through the indwelling needle, the holding component is connected to the puncture steel needle, the indwelling needle and the extension tube are connected to two of the channels of the three-way pipe, the holding component is detachably connected to the third channel of the three-way pipe, the septum is arranged inside the three-way pipe, the puncture steel needle hermetically passes through the septum, the rotary fixing component is rotatably sleeved on the side wall of the three-way pipe and is clamped with the holding component, the protective sleeve is sleeved on the indwelling needle and is detachably connected to the three-way pipe, the connecting seat is arranged at one end of the extension tube away from the three-way pipe, the hemostatic clip is movably arranged on the extension tube, and the heparin cap is detachably connected to the connecting seat or the three-way pipe; the puncture steel needle comprises a hollow section of the puncture steel needle and a solid section of the puncture steel needle, the hollow section of the puncture steel needle is a tubular structure coaxially connected to the solid section of the puncture steel needle, a puncture steel needle opening is arranged on the side wall of the hollow section of the puncture steel needle connected to the solid section of the puncture steel needle, the puncture steel needle opening is a through hole, and the puncture steel needle opening is arranged at the intersection of the three channels inside the three-way pipe.

[0006] The beneficial effects of the present invention are as follows: Compared with the straight indwelling needle in the prior art, by providing a three-way pipe, the present invention facilitates, on the basis of the normal use of the puncture steel needle, connecting an external extension tube to connect an external hemodialysis pipeline for hemodialysis or connecting an infusion set, blood transfusion set, syringe, etc. for infusion, blood transfusion, determination of blood flow rate, and position of the indwelling needle in the blood vessel; a holding component is provided on the basis of the three-way pipe to facilitate the medical staff to hold and withdraw the puncture steel needle; the rotation fixing component is rotatably sleeved on the side wall of the three-way pipe, which is beneficial to adjusting the angle of the rotation fixing component on the side wall of the three-way pipe after the puncture steel needle is withdrawn, facilitating the use of adhesive tape to fix the three-way pipe on the patient's skin, and avoiding the puncture needle from shaking due to limb movement during the dialysis process of the patient, thereby avoiding adverse consequences such as the puncture needle piercing through the blood vessel, damaging the blood vessel wall, causing hematoma, and blood loss; the hemostatic clip is movably arranged on the extension tube, which is beneficial to being clamped or opened according to the operation needs, facilitating the control of the entry and exit of blood and infusion (blood transfusion) liquid into and out of the blood vessel, effectively avoiding problems such as external air and blood clots entering the body and preventing blood loss; the heparin cap is beneficial to being connected to the connection seat or the three-way pipe at different stages of hemodialysis. On the one hand, it avoids the additional use of a heparin cap, reducing the use cost. On the other hand, it is beneficial to avoid blood leakage from the three-way pipe due to insufficient sealing of the septum; compared with the straight indwelling needle in the prior art and the indwelling needle used in intravenous infusion, the present invention creatively sets the puncture steel needle into a hollow section and a solid section of the puncture steel needle. A puncture steel needle opening is provided at the connection between the hollow section and the solid section of the puncture steel needle, and the puncture steel needle opening is arranged at the intersection of the three channels inside the three-way pipe, which is beneficial to connecting the inner cavity of the puncture steel needle with the extension tube, facilitating the timely and rapid determination of blood return after the puncture steel needle punctures into the blood vessel and using a syringe to connect to the extension tube to aspirate blood return, so as to test whether the blood flow rate meets the requirements of dialysis treatment. The solid section of the puncture steel needle can effectively prevent the problem of needle breakage caused by the overlong length of the puncture steel needle and prevent blood loss caused by blood flowing out from the tail end of the puncture steel needle.

[0007] On the basis of the above technical solution, the present invention can be further improved as follows.

[0008] Further, the three-way pipe includes a straight pipe and a side pipe; the side pipe is arranged on the side wall of the straight pipe and is communicated with the straight pipe. The extension tube is communicated with one end of the side pipe far away from the straight pipe, and the protective sleeve is detachably arranged at one end of the straight pipe.

[0009] The beneficial effects of adopting the above further solution are as follows: The three-way pipe composed of the straight pipe and the side pipe is beneficial to the smooth withdrawal of the puncture steel needle after the indwelling needle is inserted into the blood vessel on the one hand, and is beneficial to connecting an external extension tube to connect an external hemodialysis pipeline for hemodialysis or connecting an infusion set, blood transfusion set, syringe, etc. for infusion, blood transfusion, determination of blood flow rate, and position of the indwelling needle in the blood vessel on the other hand.

[0010] Further, the indwelling needle includes an indwelling hose and a funnel; the funnel is adaptively arranged in the straight tube, one end of the indwelling hose is adaptively arranged in the straight tube and communicated with the funnel, and the hollow section of the puncture steel needle passes through the indwelling hose and the funnel.

[0011] The beneficial effect of adopting the above further solution is that: the indwelling hose is beneficial to staying in the blood vessel after the hollow section of the puncture steel needle is withdrawn, draining the blood in the blood vessel to the outside of the body or providing a channel for external medicinal liquid or blood to flow back into the blood vessel.

[0012] Further, a plurality of blood inlet holes are wound around the side wall of the end of the indwelling hose away from the funnel, and the blood inlet holes are through holes.

[0013] The beneficial effect of adopting the above further solution is that: the blood inlet holes are beneficial to increasing the blood flow rate when the blood flows from the blood vessel to the indwelling hose, and at the same time can also avoid the problem of small blood flow rate caused by the end of the indwelling hose abutting against the blood vessel wall.

[0014] Further, the rotation fixing assembly includes a rotating wing and a rotating wing handle; the rotating wing is a housing structure rotatably sleeved on the side wall of the straight tube, and the rotating wing handle is a plate-like structure connected to the rotating wing.

[0015] The beneficial effect of adopting the above further solution is that: it is beneficial to adjust the angle of the rotating wing on the side wall of the three-way pipe after the puncture steel needle is withdrawn, so as to facilitate fixing the rotating wing handle and the three-way pipe on the patient's skin with tape, avoiding the puncture needle from shaking due to limb movement during dialysis, thereby avoiding adverse consequences such as the puncture needle piercing through the blood vessel, damaging the blood vessel wall, causing hematoma, blood loss, etc.

[0016] Further, the holding assembly includes: a needle seat, a needle seat handle and a needle shell cap; the needle seat handle is installed on the side wall of the needle shell cap, the needle seat is arranged inside the needle shell cap, one end of the solid section of the puncture steel needle away from the hollow section of the puncture steel needle is fixedly connected to the needle seat, and the rotating wing handle is detachably clamped with the needle seat handle.

[0017] The beneficial effect of adopting the above further solution is that: the needle seat handle is beneficial for medical staff to hold and withdraw the puncture steel needle. The needle seat is beneficial for fixing the puncture steel needle on the one hand, and for blocking one end of the three-way pipe when the puncture steel needle penetrates into the blood vessel on the other hand, increasing the connection stability between the holding assembly and the three-way pipe. The detachable clamping of the rotating wing handle and the needle seat handle is beneficial for fixing the rotation fixing assembly when the puncture steel needle penetrates into the blood vessel and avoiding affecting the operation.

[0018] Further, the isolation plug is an elastic rubber plug adaptively arranged inside the straight tube.

[0019] The beneficial effects of adopting the above further solution are as follows: The isolation plug is beneficial to sealing the channel through which the puncture steel needle passes by its own elasticity after the puncture steel needle is withdrawn, avoiding blood leakage from the isolation plug to the outside of the three-way pipe.

[0020] Furthermore, threads are provided on the outer wall of one end of the connection seat away from the extension tube and on the outer wall of one end of the straight tube away from the indwelling needle, and the heparin cap is threadedly connected to the connection seat or the straight tube.

[0021] The beneficial effects of adopting the above further solution are as follows: When the holding assembly does not drive the puncture steel needle to be withdrawn, the heparin cap is threadedly connected to the connection seat, which is beneficial to avoiding blood leakage from the connection seat when judging whether the blood flow meets the requirements; when the holding assembly drives the puncture steel needle to be withdrawn, the heparin cap is threadedly connected to the straight tube, which is beneficial to avoiding blood leakage from the three-way pipe due to insufficient sealing of the isolation plug. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure provided by the embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the indwelling needle remaining in the blood vessel after the holding assembly drives the puncture steel needle to be withdrawn provided by the embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the indwelling needle remaining in the blood vessel and the heparin cap being installed on the three-way pipe after the holding assembly drives the puncture steel needle to be withdrawn provided by the embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the holding assembly and the puncture steel needle provided by the embodiment of the present invention.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Three-way pipe; 2. Puncture steel needle; 3. Indwelling needle; 4. Rotating and fixing assembly; 5. Holding assembly; 6. Isolation plug; 7. Extension tube; 8. Heparin cap; 9. Protective sleeve; 10. Hemostatic clip; 11. Connection seat; 21. Hollow section of the puncture steel needle; 22. Solid section of the puncture steel needle; 23. Opening of the puncture steel needle; 31. Indwelling hose; 32. Funnel; 41. Rotating wing; 42. Rotating wing handle; 51. Needle seat; 52. Needle seat handle; 53. Needle shell cap; 101. Straight tube; 102. Side tube; 311. Blood inlet hole. Detailed Embodiments

[0028] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0029] As Figures 1 to 4 shown, an arteriovenous puncture needle includes: a three-way pipe 1, a puncture steel needle 2, an indwelling needle 3, a rotary fixing component 4, a holding component 5, a septum 6, an extension tube 7, a heparin cap 8, a protective sleeve 9, a hemostatic clip 10, and a connection seat 11; the puncture steel needle 2 passes through the indwelling needle 3, the holding component 5 is connected to the puncture steel needle 2, the indwelling needle 3 and the extension tube 7 are connected to two of the channels of the three-way pipe 1, the holding component 5 is detachably connected to the third channel of the three-way pipe 1, the septum 6 is arranged inside the three-way pipe 1, the puncture steel needle 2 hermetically passes through the septum 6, the rotary fixing component 4 is rotatably sleeved on the side wall of the three-way pipe 1 and is clamped with the holding component 5, the protective sleeve 9 is sleeved on the indwelling needle 3 and is detachably connected to the three-way pipe 1, the connection seat 11 is arranged at one end of the extension tube 7 away from the three-way pipe 1, the hemostatic clip 10 is movably arranged on the extension tube 7, and the heparin cap 8 is detachably connected to the connection seat 11 or the three-way pipe 1; the puncture steel needle 2 includes a puncture steel needle hollow section 21 and a puncture steel needle solid section 22, the puncture steel needle hollow section 21 is a tubular structure coaxially connected to the puncture steel needle solid section 22, a puncture steel needle opening 23 is arranged on the side wall of the puncture steel needle hollow section 21 connected to the puncture steel needle solid section 22, the puncture steel needle opening 23 is a through hole, and the puncture steel needle opening 23 is arranged at the intersection of the three channels inside the three-way pipe 1.

[0030] Among them, it should be noted that: the puncture steel needle 2 hermetically passing through the septum 6 means that when the puncture steel needle 2 passes through the septum 6, there is a sealed connection between the puncture steel needle 2 and the septum 6, and when the puncture steel needle 2 is withdrawn, the septum 6 can automatically close the channel through which the puncture steel needle 2 originally passed through the septum 6 due to its own elasticity.

[0031] The beneficial effects of the present invention are as follows: compared with the straight indwelling needle in the prior art, the present invention is advantageous in that, on the basis of the normal use of the puncture needle, the external extension tube is used to connect the external hemodialysis pipeline for hemodialysis or to connect the infusion set, blood transfusion set, syringe, etc. for infusion, blood transfusion and the judgment of the blood flow and the position of the indwelling needle in the blood vessel; a gripping assembly is arranged on the basis of the three-way pipe, which is convenient for medical staff to grip and withdraw the puncture needle; the rotating fixing assembly can be rotatably sleeved on the side wall of the three-way pipe, which is advantageous for adjusting the angle of the rotating fixing assembly on the side wall of the three-way pipe after the puncture needle is withdrawn, and it is convenient to use tape to fix the three-way pipe on the patient's skin, so as to avoid the puncture needle shaking due to the movement of the limbs of the patient during the dialysis process, thereby avoiding the puncture needle from piercing the blood vessel, damaging the blood vessel wall, causing hematoma, blood loss and other adverse consequences; the hemostatic clamp can be movably arranged on the extension tube, which is advantageous for clamping or opening according to the operation needs, and is convenient for controlling the blood and infusion (transfusion) fluid entering and exiting the blood vessel, and effectively avoiding extracorporeal air The heparin cap is convenient for connecting with the connecting seat or three-way pipe at different stages of hemodialysis, which avoids the use of an additional heparin cap and reduces the use cost. On the other hand, it is convenient for preventing blood from leaking out of the three-way pipe due to the loose sealing of the isolation plug. Compared with the straight indwelling needle and the indwelling needle used for intravenous infusion in the prior art, the present invention creatively arranges the puncture steel needle into a hollow section and a solid section. A puncture needle opening is set at the connection of the solid section of the needle, and the puncture needle opening is set at the intersection of three channels inside the three-way pipe, which is conducive to connecting the inner cavity of the puncture needle with the extension tube, and is convenient for timely and rapid judgment of the blood return situation after the puncture needle punctures the blood vessel and using a syringe to connect the extension tube to draw back blood, so as to test whether the blood flow meets the dialysis treatment requirements. The solid section of the puncture needle can effectively prevent the puncture needle from being broken due to its excessive length, and prevent blood from flowing out from the tail end of the puncture needle to cause blood loss.

[0032] Preferably, Figures 1 to 3 As shown, the three-way pipe 1 includes a straight pipe 101 and a side pipe 102; the side pipe 102 is arranged on the side wall of the straight pipe 101 and is connected to the straight pipe 101, the extension pipe 7 is connected to one end of the side pipe 102 away from the straight pipe 101, and the protective cover 9 is detachably arranged at one end of the straight pipe 101.

[0033] It should be noted that, in a preferred embodiment of the present invention, the length of the straight tube 101 is 3-4 cm.

[0034] The beneficial effects of adopting the above preferred solution are as follows: On the one hand, the tee pipe composed of the straight pipe and the side pipe is conducive to the smooth extraction of the puncture steel needle after the indwelling needle is inserted into the blood vessel. On the other hand, it is conducive to the external extension tube, so as to connect the external hemodialysis pipeline for hemodialysis or connect the infusion set, blood transfusion set, syringe, etc. for infusion, blood transfusion and the judgment of the blood flow rate and the position of the indwelling needle in the blood vessel.

[0035] Preferably, as Figures 1 to 3 shown, the indwelling needle 3 includes an indwelling hose 31 and a funnel 32; the funnel 32 is adaptively arranged in the straight pipe 101, one end of the indwelling hose 31 is adaptively arranged in the straight pipe 101 and communicated with the funnel 32, and the hollow section 21 of the puncture steel needle passes through the indwelling hose 31 and the funnel 32.

[0036] The beneficial effects of adopting the above preferred solution are as follows: The indwelling hose is conducive to staying in the blood vessel after the hollow section of the puncture steel needle is extracted, draining the blood in the blood vessel to the outside of the body or providing a channel for external medicinal liquid or blood to flow back into the blood vessel.

[0037] Preferably, as Figure 2 and Figure 3 shown, a plurality of blood inlet holes 311 are wound around the side wall of the end of the indwelling hose 31 away from the funnel 32, and the blood inlet holes 311 are through holes.

[0038] The beneficial effects of adopting the above preferred solution are as follows: The blood inlet holes are conducive to increasing the blood flow rate when the blood flows from the blood vessel to the indwelling hose, and at the same time can avoid the problem of small blood flow rate caused by the end of the indwelling hose abutting against the blood vessel wall.

[0039] Preferably, as Figures 1 to 3 shown, the rotary fixing assembly 4 includes a rotary wing 41 and a rotary wing handle 42; the rotary wing 41 is a housing structure rotatably sleeved on the side wall of the straight pipe 101, and the rotary wing handle 42 is a plate-like structure connected to the rotary wing 41.

[0040] The beneficial effects of adopting the above preferred solution are as follows: It is conducive to adjusting the angle of the rotary wing on the side wall of the tee pipe after the puncture steel needle is extracted, so as to facilitate fixing the rotary wing handle and the tee pipe on the patient's skin with tape, avoiding the puncture needle from shaking due to the patient's limb movement during dialysis, thereby avoiding adverse consequences such as the puncture needle piercing the blood vessel, damaging the blood vessel wall, causing hematoma, blood loss, etc.

[0041] Preferably, as Figure 1 and Figure 4As shown, the holding assembly 5 includes: a needle seat 51, a needle seat handle 52 and a needle shell cap 53; the needle seat handle 52 is installed on the side wall of the needle shell cap 53, the needle seat 51 is arranged inside the needle shell cap 53, the end of the solid section of the puncture needle 22 away from the hollow section of the puncture needle 21 is fixedly connected to the needle seat 51, and the rotating wing handle 42 is detachably clamped to the needle seat handle 52.

[0042] The beneficial effects of adopting the above-mentioned preferred scheme are: the needle seat handle is conducive to the medical staff to hold and pull out the puncture needle. On the one hand, the needle seat is conducive to fixing the puncture needle, and on the other hand, it is conducive to blocking one end of the three-way pipe when the puncture needle penetrates into the blood vessel, thereby increasing the stability of the connection between the holding component and the three-way pipe. The rotating wing handle is detachably connected to the needle seat handle, which is conducive to fixing the rotating fixing component when the puncture needle penetrates into the blood vessel, thereby avoiding affecting the operation.

[0043] Preferably, Figures 1 to 3 As shown, the isolation plug 6 is an elastic rubber plug adapted to be arranged inside the straight tube 101 .

[0044] The beneficial effect of adopting the above preferred scheme is that the isolation plug is conducive to closing the channel through which the puncture needle passes by utilizing its own elasticity after the puncture needle is withdrawn, thereby preventing blood from leaking from the isolation plug to the outside of the three-way pipe.

[0045] Preferably, Figures 1 to 3 As shown, threads are provided on the outer wall of one end of the connecting seat 11 away from the extension tube 7 and the outer wall of one end of the straight tube 101 away from the indwelling needle 3, and the heparin cap 8 is threadedly connected to the connecting seat 11 or the straight tube 101.

[0046] The beneficial effects of adopting the above-mentioned preferred scheme are: when the holding component does not drive the puncture needle to be pulled out, the heparin cap is threadedly connected to the connecting seat, which is beneficial to avoid blood leakage from the connecting seat when judging whether the blood flow meets the requirements; when the holding component drives the puncture needle to be pulled out, the heparin cap is threadedly connected to the straight tube, which is beneficial to avoid blood leakage from the three-way pipe due to loose sealing of the isolation plug.

[0047] The working process of the present invention is described below:

[0048] like Figures 1 to 4As shown, the protective cover 9 is removed to expose the puncture steel needle 2 and the indwelling needle 3 to the three-way pipe 1, and the puncture steel needle 2 is inserted into the patient's blood vessel. Since the indwelling hose 31 is sleeved on the hollow section 21 of the puncture steel needle, when the hollow section 21 of the puncture steel needle is inserted into the blood vessel, the indwelling hose 31 will enter the blood vessel together with the hollow section 21 of the puncture steel needle. At this time, a small part of the blood in the blood vessel will flow from the gap between the puncture steel needle 2 and the indwelling hose 31 to the funnel 32, and then flow from the funnel 32 and the side tube 102 to the extension tube 7, and most of the blood in the blood vessel will enter the hollow section 21 of the puncture steel needle from the port of the hollow section 21 of the puncture steel needle, and gush out from the puncture steel needle opening 23, and flow along the side tube 102 to the extension tube 7;

[0049] Clamp the hemostatic clip 10, remove the heparin cap 8 on the connection seat 11, open the hemostatic clip 10 after connecting the external syringe, and aspirate the syringe. If the blood in the syringe reaches more than 20 ml within 6 seconds, it means that the position of the indwelling needle in the blood vessel is appropriate and the blood flow meets the dialysis treatment requirements;

[0050] Re-clamp the hemostatic clip 10, remove the syringe and connect the hemodialysis pipeline, hold the needle seat handle 52, and pull the puncture needle 2 out of the three-way pipe 1. When the puncture needle 2 is pulled out of the isolation plug 6, the isolation plug 6 automatically closes the original passage of the puncture needle 2 in the isolation plug 6 by its own elasticity, preventing blood from leaking out of the three-way pipe 1 through the isolation plug 6. When the puncture needle 2 is pulled out of the isolation plug 6, the heparin cap 8 is installed on the straight pipe 101 to prevent blood from leaking out of the three-way pipe due to the loose sealing of the isolation plug 6.

[0051] Adjust the rotation angle of the rotating wing 41 on the straight tube 101 so that the rotating wing handle 42 is roughly parallel to the patient's skin, and then use tape to fix the rotating fixing assembly 4 and the three-way pipe 1 on the patient's skin;

[0052] Finally, the hemostatic clip 10 is reopened, the external equipment is started, and the hemodialysis treatment begins.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0055] In the present invention, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0057] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An arteriovenous puncture needle, characterized in that: include: A three-way pipe (1), a puncture needle (2), an indwelling needle (3), a rotating fixing component (4), a holding component (5), an isolation plug (6), an extension tube (7), a heparin cap (8), a protective sleeve (9), a hemostatic clip (10) and a connecting seat (11); the puncture needle (2) passes through the indwelling needle (3), the holding component (5) is connected to the puncture needle (2), the indwelling needle (3) and the extension tube (7) are connected to two of the channels of the three-way pipe (1), the holding component (5) is detachably connected to the third channel of the three-way pipe (1), and the isolation plug (6) is arranged on the three channels. In the three-way pipe (1), the puncture steel needle (2) is sealed and passes through the isolation plug (6); the rotating fixing component (4) is rotatably sleeved on the side wall of the three-way pipe (1) and is clamped with the holding component (5); the protective sleeve (9) is sleeved on the indwelling needle (3) and is detachably connected to the three-way pipe (1); the connecting seat (11) is arranged at one end of the extension tube (7) away from the three-way pipe (1); the hemostatic clamp (10) is movably arranged on the extension tube (7); and the heparin cap (8) is detachably connected to the connecting seat (11) or the three-way pipe (1); The puncture steel needle (2) comprises a hollow puncture steel needle section (21) and a solid puncture steel needle section (22); the hollow puncture steel needle section (21) is a tubular structure coaxially connected to the solid puncture steel needle section (22); a puncture steel needle opening (23) is provided on a side wall where the hollow puncture steel needle section (21) is connected to the solid puncture steel needle section (22); the puncture steel needle opening (23) is a through hole; and the puncture steel needle opening (23) is provided at the intersection of three channels inside the three-way pipe (1).

2. An arteriovenous puncture needle according to claim 1, characterized in that: The three-way pipeline (1) comprises a straight pipe (101) and a side pipe (102); the side pipe (102) is arranged on the side wall of the straight pipe (101) and is in communication with the straight pipe (101); the extension pipe (7) is in communication with an end of the side pipe (102) away from the straight pipe (101); and the protective sleeve (9) is detachably arranged at one end of the straight pipe (101).

3. An arteriovenous puncture needle according to claim 2, characterized in that: The indwelling needle (3) comprises an indwelling hose (31) and a funnel (32); the funnel (32) is adapted to be arranged in the straight tube (101), one end of the indwelling hose (31) is adapted to be arranged in the straight tube (101) and is connected to the funnel (32), and the hollow section (21) of the puncture steel needle passes through the indwelling hose (31) and the funnel (32).

4. An arteriovenous puncture needle according to claim 3, characterized in that: A plurality of blood inlet holes (311) are arranged on the side wall of one end of the indwelling hose (31) away from the funnel (32), and the blood inlet holes (311) are through holes.

5. The arteriovenous puncture needle according to claim 2, characterized in that: The rotating fixing assembly (4) comprises a rotating wing (41) and a rotating wing handle (42); the rotating wing (41) is a shell structure rotatably sleeved on the side wall of the straight tube (101), and the rotating wing handle (42) is a plate-shaped structure connected to the rotating wing (41).

6. An arteriovenous puncture needle according to claim 5, characterized in that: The holding assembly (5) comprises: a needle seat (51), a needle seat handle (52) and a needle shell protective cap (53); the needle seat handle (52) is installed on the side wall of the needle shell protective cap (53), the needle seat (51) is arranged inside the needle shell protective cap (53), the end of the solid section of the puncture steel needle (22) away from the hollow section of the puncture steel needle (21) is fixedly connected to the needle seat (51), and the rotating wing handle (42) is detachably clamped to the needle seat handle (52).

7. An arteriovenous puncture needle according to claim 2, characterized in that: The isolation plug (6) is an elastic rubber plug adapted to be arranged inside the straight tube (101).

8. An arteriovenous puncture needle according to claim 2, characterized in that: The outer wall of the end of the connecting seat (11) away from the extension tube (7) and the outer wall of the end of the straight tube (101) away from the indwelling needle (3) are provided with threads, and the heparin cap (8) is threadedly connected to the connecting seat (11) or the straight tube (101).

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