Double-cavity rheumatoid arthritis hydrops puncture needle and application method

Abstract

The invention relates to a double-cavity rheumatoid arthritis hydrops puncture needle and an application method. The double-cavity rheumatoid arthritis hydrops puncture needle comprises a needle head and a socket, the socket comprises a large sleeve and a small sleeve which are sleeved in a sliding manner, the large sleeve is matched with the outer diameter of the injector, and one end, far away from the large sleeve, of the small sleeve is connected with the needle through a hose; a spacer is arranged in the middle of the interior of the large sleeve, a spacer cap is formed on the spacer, and an extrusion needle is arranged on the spacer cap in a penetrating manner; a rubber plug is arranged in the small sleeve, a through hole is formed in the rubber plug, one end of the through hole is hermetically communicated with the hose, and the other end is matched with the extrusion needle; an overflow groove is formed in the surface of the side, facing the small sleeve, of the partition piece, a protruding strip corresponding to the overflow groove is arranged on the rubber plug, and an overflow hole corresponding to the overflow groove is formed in the large sleeve. In conclusion, the invention provides a safe, efficient, convenient and economical joint cavity effusion puncture injection solution, and the medical experience and the medical safety of the patient are improved to the maximum extent while the treatment effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more particularly to a double-cavity rheumatoid arthritis effusion puncture needle and application method. BACKGROUND

[0002] Joint cavity injection is a common and effective treatment method for various joint diseases such as rheumatoid arthritis. The operation process is usually as follows: the medical staff first accurately inserts the injection needle into the patient's joint cavity, then connects the syringe filled with liquid medicine, and directly pushes the medicine into the joint cavity to achieve local high-concentration drug delivery and rapid symptom relief.

[0003] In the conventional operation, multiple puncture operations are required, and air exhaust operation is performed before each injection. Although this standard operation can ensure safety, it will cause pain and tissue damage to the patient due to repeated puncture. In order to avoid this point, another method uses continuous injection without removing the needle, that is, after completing the first liquid injection, only the needle tube (i.e. the syringe barrel) of the syringe is pulled out from the needle tail interface (or plug) left in the joint cavity, and then another needle tube filled with pre-drawn liquid is connected to the needle interface for continuous injection of liquid. The core advantage of this operation is that the needle is always left in the joint cavity, avoiding iatrogenic damage to the joint capsule, synovial membrane and surrounding soft tissue caused by multiple punctures, and also simplifying the operation process. However, the above operation process has the serious defect that some air cannot be exhausted.

[0004] In order to solve the above-mentioned problems, Chinese patent application No. CN202110781949.X provides a rheumatoid arthritis patient joint cavity effusion extraction device, which uses an air extraction mechanism to extract this part of air to exhaust and eliminate air pollution. However, this structure does not exhaust the liquid medicine in contact with the air, which makes its anti-pollution performance poor, and the plug structure has a large gap, which causes a lot of liquid medicine to remain, resulting in serious waste. The configuration of the exhaust fan structure also makes the structure very complex, and a double-cavity rheumatoid arthritis effusion puncture needle and application method with simple structure, good reliability, good anti-pollution performance and easy use are needed. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a double-cavity rheumatoid arthritis effusion puncture needle and an application method thereof to solve the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present application to solve the technical problem is: The application discloses a double-cavity rheumatoid arthritis effusion puncture needle, which comprises a needle head and a socket; the socket comprises a large sleeve and a small sleeve which are slidably sleeved, the large sleeve is matched with the outer diameter of a syringe, and the small sleeve is connected with the needle head through a hose at the end away from the large sleeve; A partition is arranged at the middle position of the inner part of the large sleeve, a partition cap corresponding to the head of the syringe is formed on the partition, an extrusion needle with a spherical end is arranged on the partition cap, and a sealing ring is arranged at the bottom end of the partition cap; A rubber plug is arranged in the inner part of the small sleeve, a through hole is arranged in the rubber plug, one end of the through hole is in sealed communication with the hose, and the other end is matched with the extrusion needle; An overflow groove is arranged on the surface of the side of the partition facing the small sleeve, a convex strip corresponding to the overflow groove is arranged on the rubber plug, and an overflow hole corresponding to the overflow groove is arranged on the large sleeve; In the initial state, the large sleeve and the small sleeve are respectively located at the farthest end of the sliding stroke, and the extrusion needle is spaced from the through hole; before starting the injection, the large sleeve and the small sleeve are respectively located at the nearest end of the sliding stroke, the extrusion needle is inserted into the through hole, the rubber plug is attached to the partition, and the convex strip enters the overflow groove.

[0007] The double-cavity rheumatoid arthritis effusion puncture needle provided by the application, wherein the large sleeve is cylindrical and is sleeved outside the small sleeve; The inner wall of the large sleeve is provided with a plurality of axially distributed sliding grooves, and the outer surface of the small sleeve is provided with a plurality of convex sliding blocks matched with the sliding grooves one by one.

[0008] The double-cavity rheumatoid arthritis effusion puncture needle provided by the application, wherein the end of the rubber plug is provided with an annular part attached to the end of the small sleeve, and the convex strip extends to the annular part.

[0009] The double-cavity rheumatoid arthritis effusion puncture needle provided by the application, wherein the small sleeve comprises an annular ring slidably matched with the large sleeve and a cylindrical body connected with the annular ring, and the outer diameter of the cylindrical body is smaller than that of the annular ring. The convex sliding blocks are arranged on the annular ring, the inner side surface of the end of the large sleeve is provided with an annular elastic diaphragm, the inner ring of the elastic diaphragm is fixedly connected with the outer surface of the cylindrical body, and the elastic diaphragm is used for resetting the cylindrical body.

[0010] The double-cavity rheumatoid arthritis effusion puncture needle provided by the application, wherein the end face of the end of the large sleeve is rotationally provided with a stop sheet abutting against the position of the cylindrical body.

[0011] The double-cavity rheumatoid arthritis effusion puncture needle, wherein the overflow hole is provided with an overflow pipe, and an overflow bag for collecting liquid is arranged at the end of the overflow pipe.

[0012] The double-cavity rheumatoid arthritis effusion puncture needle, wherein the inner wall of the large sleeve is provided with a damping sleeve for providing damping force to the syringe.

[0013] The application method of the double-cavity rheumatoid arthritis effusion puncture needle, according to the double-cavity rheumatoid arthritis effusion puncture needle, wherein the method comprises the following steps: In the initial state, the large sleeve and the small sleeve are located at the farthest end of the sliding stroke, and the extrusion needle is spaced apart from the through hole; The syringe filled with the liquid medicine is inserted into the large sleeve, and the head of the syringe is inserted into the partition cap; The piston rod of the syringe is slowly pushed, so that part of the liquid medicine is extruded out of the extrusion needle, and the air is exhausted and part of the liquid medicine in contact with the air is discharged; The large sleeve and the small sleeve are retracted, so that the extrusion needle is inserted into the through hole, the rubber plug is attached to the partition, and the convex strip is inserted into the overflow groove, and the extruded liquid medicine is extruded out of the overflow hole.

[0014] The application has the following beneficial effects: 1. The risk of air residue and bacterial contamination is completely eliminated: After the syringe is inserted into the large sleeve, the air in the extrusion needle and part of the liquid medicine in contact with the air can be discharged by pushing the piston rod, and then, before the sliding sleeve makes the extrusion needle inserted into the through hole, the rubber plug and the partition have not been attached, and the mixture of the discharged liquid medicine and air can be smoothly discharged outside the system through the overflow groove and the overflow hole; this "pre-exhaustion" mechanism ensures that the liquid medicine entering the joint cavity is pure and sterile, and the principle mechanism is consistent with the existing injection exhaust mechanism, which completely eliminates the risk of iatrogenic infection caused by air residue in the interface.

[0015] 2. Multiple drug combination in the case of "not pulling out the needle": The needle of the device is connected with the socket through the hose and is always left in the joint cavity; medical staff only need to insert the syringes containing different medicines into the same large sleeve in order, and repeat the above exhaust and connection operations, so as to complete the continuous injection of multiple drugs; the whole process does not need to pull out the needle, greatly reducing the pain and tissue damage of the patient caused by repeated puncture, and perfectly adapting to the complex clinical needs of combined drug use in the treatment of rheumatoid arthritis and other diseases.

[0016] 3. Simple operation and efficient exhaust: Compared with the complex air extraction mechanism design in the prior art, the present application only needs two simple actions of "pushing medicine and exhausting air" and "sliding connection" to complete; the cooperation of the partition cap and the injector head ensures the sealing of the medicine liquid flow path, and the cooperation of the convex strip and the overflow groove ensures the smoothness of the exhaust passage; the extrusion needle as the core connecting piece of the present application is not only used for simulating the existing injection exhaust mechanism, but also used for separation with the rubber plug to complete the quick switching of the two actions, and also used for ensuring the air tightness of injection, which greatly reduces the operation difficulty, improves the injection efficiency, and is especially suitable for popularization and application in busy clinical environment.

[0017] 4. Compact structure, controllable cost, easy to popularize and spread: The device is mainly composed of a needle, a hose, a large sleeve and a small sleeve, an internal rubber plug, a partition piece and the like, and has a simple and compact structure, which is convenient for processing, manufacturing and disinfection and sterilization; compared with the device requiring an additional air extraction pump or having a complex internal flow channel, the manufacturing cost and maintenance cost of the present application are significantly reduced, which is beneficial to popularization in medical institutions at all levels.

[0018] In summary, the present application provides a safe, efficient, convenient and economical joint cavity effusion puncture injection solution, which maximizes the patient's medical experience and medical safety while ensuring treatment effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be further described below in conjunction with the drawings and embodiments. The drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not deviating from the concept of the present application: Figure 1 is a cross-sectional view of the double-cavity rheumatoid arthritis effusion puncture needle of the preferred embodiment of the present application; Figure 2 is a flow chart of the application method of the double-cavity rheumatoid arthritis effusion puncture needle of the preferred embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described below in a clear and complete manner. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0021] The double-cavity rheumatoid arthritis effusion puncture needle of the preferred embodiment of the present application, like Figure 1As shown, including needle 1 and socket; socket includes sliding sleeve large sleeve 2 and small sleeve 3, large sleeve 2 matches the outer diameter of syringe 5, small sleeve 3 is connected with needle 1 through hose 4 away from the end of large sleeve 2; The middle position of the inner of large sleeve 2 is provided with a partition 20, the partition 20 is formed with a cap 21 corresponding to the head of syringe 5, the cap 21 is provided with an extrusion needle 22 with a spherical end, and the bottom end of the cap 21 is provided with a sealing ring 23; The inside of small sleeve 3 is provided with a rubber plug 30, the rubber plug 30 is provided with a through hole 31, one end of the through hole 31 is in sealed communication with the hose 4, and the other end is matched with the extrusion needle 22; The side surface of the partition 20 facing the small sleeve 3 is provided with an overflow groove 24, the rubber plug 30 is provided with a convex strip 32 corresponding to the overflow groove 24, and the large sleeve 2 is provided with an overflow hole 33 corresponding to the overflow groove 24; In the initial state, the large sleeve 2 and the small sleeve 3 are located at the farthest end of the sliding stroke respectively, and the extrusion needle 22 has a spacing with the through hole 31; Insert the syringe 5 containing the liquid medicine into the large sleeve 2, and the head of the syringe 5 corresponds to extend into the cap 21; Slowly push the piston rod of the syringe 5, so that part of the liquid medicine is extruded by the extrusion needle 22, and the air and the part of the liquid medicine contacted with the air are discharged; Shrink the large sleeve 2 and the small sleeve 3, so that the extrusion needle 22 is inserted into the through hole 31, the rubber plug 30 is attached to the partition 20, and the convex strip 32 enters the overflow groove 24, and the extruded liquid medicine is extruded from the overflow hole 33; And then the injection operation can be performed.

[0022] The special cavity structure of the double cavity, i.e. the large sleeve and the small sleeve, has the beneficial effects of the scheme: 1. Completely eliminate the risk of air residue and bacterial contamination: After the syringe 5 is inserted into the large sleeve 2, the air in the extrusion needle 22 and the part of the liquid medicine contacted with the air can be discharged by pushing the piston rod, and then, before the sliding sleeve makes the extrusion needle 22 inserted into the through hole 31, the rubber plug 30 and the partition 20 have not been attached, and the discharged mixture of liquid medicine and air can be smoothly discharged outside the system through the overflow groove 24 and the overflow hole 33; this "pre-discharge" mechanism ensures that the liquid medicine entering the joint cavity is pure and sterile, and the principle mechanism is consistent with the existing injection discharge mechanism, which fundamentally eliminates the risk of iatrogenic infection caused by air residue in the interface.

[0023] 2. Realize the multi-drug combination in the case of "not pulling the needle 1": The needle 1 of the device is connected with the socket through the hose 4 and is always left in the joint cavity; medical staff only needs to sequentially insert the syringes 5 drawing different medicines into the same large sleeve 2, and repeatedly carries out the above-mentioned exhaust and connection operation, so that the continuous injection of multiple medicines can be completed; the whole process does not need to pull out the needle 1, greatly reduces the pain and tissue damage of the patient caused by repeated puncture, and perfectly adapts to the complex clinical needs of combined drug therapy in the treatment of rheumatoid arthritis and other diseases.

[0024] 3. Simple operation and efficient exhaust: Compared with the complex exhaust mechanism design in the prior art, the present application only needs two simple actions of "medicine pushing and exhaust" and "sliding connection" to complete; the cooperation of the cap 21 and the head of the syringe 5 ensures the sealing of the liquid flow path, and the cooperation of the convex strip 32 and the overflow groove 24 ensures the smoothness of the exhaust passage; the extruded needle, as the core connecting piece of the scheme, is not only used to simulate the existing injection exhaust mechanism, but also used to separate the rubber plug 30 to complete the quick switching of the two actions, and also used to ensure the airtightness of injection, which greatly reduces the operation difficulty, improves the injection efficiency, and is especially suitable for popularization and application in busy clinical environment.

[0025] 4. Compact structure, controllable cost, easy to popularize and popularize: The device is mainly composed of a needle 1, a hose 4, large and small sleeves 3, internal rubber plugs 30, and a partition 20, etc., which has a simple and compact structure, is easy to process, manufacture and disinfect and sterilize; compared with the equipment which needs to be additionally configured with an exhaust pump or has a complex internal flow channel, the manufacturing cost and maintenance cost of the present application are significantly reduced, which is beneficial to popularization in medical institutions at all levels.

[0026] In summary, the present application provides a safe, efficient, convenient and economical joint cavity hydrops puncture injection solution, which maximizes the patient's medical experience and medical safety while ensuring treatment effect.

[0027] Preferably, the large sleeve 2 is cylindrical and is sleeved outside the small sleeve 3; the inner wall of the large sleeve 2 is provided with a plurality of axially distributed sliding grooves 25, and the outer surface of the small sleeve 3 is provided with a plurality of convex sliding blocks 34 corresponding to the sliding grooves; the structure is adopted to ensure the reliability of sliding.

[0028] Preferably, the end of the rubber plug 30 is provided with an annular part 300 abutting the end of the small sleeve 3, and the convex strip 32 extends to the annular part 300; the purpose of the design is to ensure the comprehensiveness of extrusion, minimize the internal liquid residue, and ensure the continuity of medicine injection.

[0029] Preferably, the small sleeve 3 includes an annular ring 35 that slides with the large sleeve 2 and a cylinder 36 (with a rubber stopper 30 inserted inside) connected to the annular ring 35, wherein the outer diameter of the cylinder 36 is smaller than the outer diameter of the annular ring 35. The raised slider 34 is set on the annular ring 35. An annular elastic diaphragm 37 is provided on the inner surface of the end of the large sleeve 2. The inner ring of the elastic diaphragm 37 is fixedly connected to the outer surface of the cylinder 36. The elastic diaphragm 37 is used to reset the cylinder. The use of the elastic diaphragm 37 here can not only provide elastic force to reset the cylinder 36, but also play a sealing role to prevent external dust from entering from the sliding connection and ensure the integrity of the whole.

[0030] Furthermore, based on the elastic diaphragm 37, a baffle 27 is rotatably mounted on the end face of the large sleeve 2 to abut the position of the cylinder 36. When the cylinder 36 slides into the interior of the large sleeve 2, the elastic diaphragm 37 is stretched, and the protrusion enters the overflow groove to squeeze out the extruded liquid from the overflow hole. By rotating the baffle 27, the position is locked, and the next injection operation can be carried out in this state. Conversely, by rotating and opening the baffle 27 (preferably arc-shaped to avoid the tubing 4), the position lock of the cylinder 36 is released, and the cylinder 36 is reset under the elastic force of the elastic diaphragm 37, so that the extrusion needle automatically exits the through hole and completes disengagement, making it convenient to connect to the next new syringe. The overall structure is reasonable and compact, low in cost, simple to operate, and can ensure injection efficiency.

[0031] Preferably, an overflow pipe is provided through the overflow hole 33, and an overflow bag 330 for collecting liquid is provided at the end of the overflow pipe to facilitate continuous collection of liquid; the overflow pipe is designed to be pluggable for easy use.

[0032] Preferably, the inner wall of the large sleeve 2 is provided with a damping sleeve 26 that provides damping force to the syringe 5, so as to facilitate the maintenance of the position and state of the inserted syringe 5.

[0033] A method for applying a double-lumen effusion aspiration needle for rheumatoid arthritis, based on the aforementioned double-lumen effusion aspiration needle for rheumatoid arthritis, such as... Figure 2 As shown, the method includes the following steps: S01: In the initial state, the large sleeve and the small sleeve are located at the farthest end of the sliding stroke, and there is a gap between the extrusion needle and the through hole; S02: Insert the syringe containing the medicine into the large sleeve, with the syringe head correspondingly inserted into the diaphragm cap; S03: Slowly push the piston rod of the syringe so that some of the medicine is squeezed out from the extrusion needle, completing the air release and expelling the part of the medicine that has been in contact with the air; S04: shrink the large sleeve and the small sleeve, so that the extrusion needle is inserted into the through hole, the rubber plug is attached to the septum, and the convex strip enters the overflow groove, and the extruded drug solution is extruded from the overflow hole; The application method of the double-cavity rheumatoid arthritis effusion puncture needle provided by the application is closely matched with the structure design of the puncture needle, and forms a systematic and standardized operation process; the method not only fully utilizes the structural advantages of the instrument, but also realizes a qualitative leap in the operation level, and the beneficial effects are specifically embodied in the following aspects: 1. A standardized "drug solution purification" process is constructed to eliminate the risk of infection from the source of operation: The core of the method is the "pre-liquid discharge-post-closure" mechanism formed by steps S03 and S04; in step S03, by pushing the syringe piston, the "first section of drug solution" that may be contaminated by bacteria in the air inside and at the front end of the extrusion needle is forced to be discharged; this operation establishes a standardized "purification" program, ensuring that the drug solution injected into the joint cavity subsequently is absolutely pure and uncontaminated; compared with the existing technology which only relies on sterile operation or complex air extraction, the method realizes self-cleaning of the drug solution flow path through simple mechanical action, and fundamentally cuts off the transmission route of iatrogenic infection.

[0034] 2. "One-key" flow path switching is realized, and the operation is extremely simple and has a high fault tolerance: The "shrinking of the large sleeve and the small sleeve" in step S04 is the key to the operation; this simple straight-line sliding action simultaneously completes three important functions: Establish a sealed flow path: the extrusion needle is inserted into the through hole, and the drug solution can be smoothly injected into the joint cavity.

[0035] Close the contaminated outlet: the rubber plug is attached to the septum, and the convex strip enters the overflow groove, automatically and reliably blocking the overflow hole, cutting off the channel for drug leakage and external contaminant backflow.

[0036] Clean the residual contaminated liquid: a small amount of contaminated drug solution remaining in the overflow groove is extruded from the overflow hole, ensuring the final cleaning of the system interior.

[0037] This "one action, multiple functions" design simplifies the complex sealing and anti-pollution logic into an intuitive physical action, greatly reducing the operation difficulty and risk of misoperation of medical staff.

[0038] 3. Perfectly supports the complex clinical scene of multiple drug combination, and improves the treatment efficiency: The method supports quick and repeated replacement of the syringe for the same puncture needle socket. When a second or third drug needs to be injected, steps S02 to S04 are repeated. Since the needle is always connected to the joint cavity through the hose, the entire drug replacement process does not require any puncture action, thereby minimizing the pain and treatment time of the patient; the method converts the originally cumbersome and high-risk multi-drug injection process into a set of safe, efficient and repeatable standardized operations, thereby significantly improving the clinical work efficiency.

[0039] 4. Ensures the continuity and stability of the entire injection process: After the exhaust in step S03, the injection preparation in step S04 can be directly performed without disconnecting the connection. Such seamless operation process avoids the flow path interruption, pressure fluctuation and possible secondary pollution caused by multiple plugging and unplugging in the traditional operation; the entire injection process is smooth and continuous, thereby ensuring that the drug can be stably and uniformly injected into the joint cavity, and improving the controllability of the treatment effect.

[0040] In summary, the application method perfectly combines the innovative instrument structure with the scientific operation process, not only solves the core pain points of "incomplete exhaust, difficult to prevent pollution and complex operation" in the prior art, but also significantly improves the clinical safety, operation convenience and treatment efficiency, and provides a new and high-standard solution for the joint cavity injection treatment of rheumatoid arthritis and other joint diseases.

[0041] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A double-lumen puncture needle for puncturing effusion in rheumatoid arthritis, characterized in that, It includes a needle and a socket; the socket includes a slidingly fitted large sleeve and a small sleeve, the large sleeve being matched with the outer diameter of the syringe, and the end of the small sleeve away from the large sleeve being connected to the needle via a flexible tube; A partition is provided in the middle of the interior of the large sleeve. A diaphragm cap corresponding to the head of the syringe is formed on the partition. An extrusion needle with a spherical end is inserted through the diaphragm cap. A sealing ring is provided at the bottom of the diaphragm cap. The small sleeve has a rubber stopper inside, and the rubber stopper has a through hole. One end of the through hole is sealed and connected to the hose, and the other end is engaged with the extrusion needle. An overflow groove is provided on the side surface of the diaphragm facing the small sleeve, a convex strip corresponding to the overflow groove is provided on the rubber plug, and an overflow hole corresponding to the overflow groove is provided on the large sleeve. In the initial state, the large sleeve and the small sleeve are located at the farthest end of the sliding stroke, and there is a gap between the extrusion needle and the through hole. Before the liquid injection begins, the large sleeve and the small sleeve are adjusted to be located at the closest end of the sliding stroke, the extrusion needle is inserted into the through hole, the rubber plug is attached to the septum, and the convex strip enters the overflow groove.

2. The double-lumen puncture needle for vesicle aspiration of rheumatoid arthritis effusion according to claim 1, characterized in that, The large sleeve is cylindrical and is fitted over the small sleeve. The inner wall of the large sleeve is provided with multiple axially distributed sliding grooves, and the outer surface of the small sleeve is provided with multiple raised sliders that correspond one-to-one with the sliding grooves.

3. The double-lumen puncture needle for vesicle aspiration of rheumatoid arthritis effusion according to claim 2, characterized in that, The end of the rubber stopper is provided with an annular portion that fits the end of the small sleeve, and the protrusion extends to the annular portion.

4. The double-lumen puncture needle for rheumatoid arthritis effusion according to claim 2, characterized in that, The small sleeve includes an annular ring that slides with the large sleeve and a cylinder connected to the annular ring, wherein the outer diameter of the cylinder is smaller than the outer diameter of the annular ring. The protruding slider is disposed on the annular ring, and an annular elastic diaphragm is disposed on the inner surface of the end of the large sleeve. The inner ring of the elastic diaphragm is fixedly connected to the outer surface of the cylinder, and the elastic diaphragm is used to reset the cylinder.

5. The double-lumen puncture needle for rheumatoid arthritis effusion according to claim 4, characterized in that, A baffle plate is rotatably provided on the end face of the large sleeve to press against the position of the cylinder.

6. The double-lumen puncture needle for vesicle aspiration of rheumatoid arthritis effusion according to claim 1, characterized in that, An overflow pipe is inserted through the overflow hole, and an overflow bag for collecting liquid is provided at the end of the overflow pipe.

7. The double-lumen puncture needle for vesicle aspiration of rheumatoid arthritis effusion according to claim 1, characterized in that, The inner wall of the large sleeve is provided with a damping sleeve that provides damping force to the syringe.

8. A method for applying a double-lumen puncture needle for effusion in rheumatoid arthritis, characterized in that, The method includes the following steps: In the initial state, the large sleeve and the small sleeve are located at the farthest end of the sliding stroke, and there is a gap between the extrusion needle and the through hole; Insert the syringe containing the medicine into the large sleeve, with the syringe head correspondingly inserted into the diaphragm cap. Slowly push the piston rod of the syringe so that some of the medicine is squeezed out through the extrusion needle, thus venting the air and expelling the part of the medicine that has been in contact with the air. The large and small sleeves are contracted, allowing the extrusion needle to insert into the through hole. The rubber plug fits the septum, and the convex strip enters the overflow groove, squeezing out the medicine from the overflow hole.

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