A venous therapy fluid exchange interface device

Abstract

This application discloses an intravenous fluid exchange connection device, belonging to the field of medical devices. The device includes an infusion tubing and a plug fixedly inserted into the infusion tubing. The plug has an infusion port communicating with the infusion tubing. The plug is equipped with a sealing assembly, which includes a lifting plate that moves axially within the plug, a sealing plug inserted into the infusion port and fixedly connected to the lifting plate, a ring that moves axially on the plug and is connected to the lifting plate for driving the lifting plate to descend, and a spring fitted onto the plug and fixedly connected to the lower end of the ring for driving the ring to rise. The sealing assembly effectively prevents external air from entering the plug during fluid exchange, greatly reducing the risk of air embolism and significantly improving the safety of intravenous therapy. Furthermore, the entire device is easy to operate; medical personnel do not need to perform any additional complex operations. Simply inserting and unplugging the plug automatically opens and seals the infusion port, improving fluid exchange efficiency.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to an intravenous therapy fluid exchange connection device. Background Technology

[0002] With the continuous development of medical technology, intravenous therapy, as an extremely common and crucial treatment method, is widely used in the clinical diagnosis and treatment of various diseases. Among them, the connecting device plays a vital role in the intravenous therapy system, connecting the infusion container (including infusion bottle, infusion bag, etc.) and the infusion tubing. Its performance directly affects whether the fluid can flow safely and stably from the infusion container into the patient's vein, and has a significant impact on the treatment effect and patient safety.

[0003] Currently, the conventional method of connecting intravenous infusion tubing to infusion containers involves inserting a conical plug at the end of the tubing directly into the rubber stopper of the infusion container. In clinical practice, when changing infusions, medical staff must first remove the plug from the old infusion container's rubber stopper before inserting the new container. This seemingly simple process harbors significant risks. Clinical practice and research have revealed that at the moment the plug is removed from the infusion container for changing the fluid, external air can easily rush into the infusion tubing through the infusion port on the plug. Due to the pressure difference within the human venous system, if a large amount of air enters, it is highly likely to flow into the veins along the infusion tubing, potentially causing air embolism—a serious problem that endangers the patient's life.

[0004] Therefore, this application provides an intravenous fluid exchange connection device to solve the above-mentioned problems. Utility Model Content

[0005] This application provides an intravenous fluid exchange connection device, which aims to solve the problems mentioned in the prior art, such as air entering the infusion tube 1 through the hole on the plug when the plug is pulled out of the infusion container for fluid exchange, which may cause air embolism.

[0006] To achieve the above objectives, this application provides the following technical solution: an intravenous therapy fluid exchange connection device, comprising an infusion tube and a plug fixedly inserted into the infusion tube, wherein the plug has an infusion port communicating with the infusion tube;

[0007] To prevent air from entering the plug through the infusion port, the plug is equipped with a sealing assembly. This assembly includes a lifting plate that moves axially within the plug, a sealing plug inserted into the infusion port and fixedly connected to the lifting plate, a ring that moves axially on the plug and is connected to the lifting plate for driving the lifting plate downwards, and a spring fitted onto the plug and fixedly connected to the lower end of the ring for driving the ring upwards. When the plug is inserted into the rubber stopper of the infusion container, the rubber stopper contacts the ring. As the plug is further inserted, the rubber stopper overcomes the spring's elasticity, compressing the spring and storing force. At this time, the ring moves the lifting plate and the sealing plug closer to the infusion tube, causing the sealing plug to move out of the infusion port, allowing the liquid in the infusion container to flow into the infusion tube through the infusion port. When the plug is removed for changing the infusion, the spring releases its elasticity, pushing the ring closer to the container. The ring then moves the lifting plate and the sealing plug, causing the sealing plug to insert into the infusion port, completing the sealing of the infusion port and preventing air from entering.

[0008] Preferably, to facilitate the insertion of the sealing plug into the infusion port: the sealing plug is in the shape of a conical rod, and the inner wall shape of the infusion port matches the outer wall shape of the sealing plug. The conical rod shape of the sealing plug and the matching shape of the inner wall of the infusion port make it easier to align the sealing plug when inserted into the infusion port, enabling quick and accurate insertion, effectively improving sealing efficiency, and reducing the probability of operational errors due to insertion difficulties.

[0009] Preferably, to improve the sealing effect of the sealing plug on the infusion orifice, the sealing plug is made of medical-grade silicone material. Medical-grade silicone material has good flexibility and elasticity, allowing it to tightly conform to the inner wall of the infusion orifice, greatly improving the sealing effect and effectively preventing air and liquid leakage. Furthermore, medical-grade silicone material is safe and non-toxic, meets medical use standards, and will not pose any additional health risks to the patient.

[0010] Preferably, to facilitate the connection between the ring and the lifting plate: the plug has a vertical groove, and a synchronizing rod that is slidably disposed inside the vertical groove and fixedly connected to the lifting plate and the ring. The design of the synchronizing rod and the vertical groove facilitates the connection between the ring and the lifting plate, ensuring that the movement of the ring can be accurately transmitted to the lifting plate, keeping the movements of the two synchronized, and ensuring the stable operation of the sealing assembly.

[0011] Preferably, to prevent liquid from flowing out of the vertical groove: a sealing plate is slidably disposed inside the plug and fixedly connected to the lifting plate, the outer wall of the sealing plate being in contact with the inner wall of the plug. The sealing plate effectively prevents liquid from flowing out of the vertical groove, avoiding potential pollution and waste caused by liquid leakage.

[0012] Preferably, to facilitate the removal of the plug from the rubber stopper of the infusion container: a square plate is fixedly fitted onto the bottom of the plug, and wedges are fixedly connected to the bottom of both sides of the square plate. The design of the square plate and wedges makes it easier for medical personnel to remove the plug from the rubber stopper of the infusion container. This increases the force application area and effect of the fingers, making the insertion and removal operation easier and less strenuous, reducing the operational difficulty and workload for medical personnel.

[0013] Preferably, to prevent slippage between the fingers and the inclined block, an anti-slip rod is fixedly installed on the inclined block. The anti-slip rod effectively prevents slippage between the fingers and the inclined block, ensuring the stability and safety of medical personnel when inserting or removing plugs, and avoiding operational errors or accidental injury to patients caused by slippage.

[0014] This application effectively prevents external air from entering the plug during fluid exchange, significantly reducing the risk of air embolism and greatly improving the safety of intravenous therapy. Furthermore, the entire device is easy to operate; medical staff do not need to perform any additional complex procedures. Simply plugging and unplugging the plug automatically opens and closes the infusion port, improving fluid exchange efficiency.

[0015] The sealing plate of this application can effectively prevent liquid from flowing out of the vertical groove, avoiding the pollution and waste that may be caused by liquid leakage.

[0016] The square plate and beveled design of this application facilitates the removal of the connector from the rubber stopper of the infusion container by medical staff. It increases the area and effectiveness of the force applied by the fingers, making the insertion and removal operation easier and less strenuous, thus reducing the difficulty and workload for medical staff. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a device for connecting intravenous fluid exchange in intravenous therapy.

[0018] Figure 2 for Figure 1 The structural sectional view in the middle;

[0019] Figure 3 This is a schematic diagram of the plug and the square plate.

[0020] Figure 4 This is a schematic diagram of the sealing component.

[0021] In the picture:

[0022] 1. Infusion tube; 2. Plug; 21. Infusion port; 22. Vertical groove; 3. Sealing assembly; 31. Lifting plate; 311. Sealing plate; 32. Sealing plug; 33. Ring; 34. Spring; 35. Synchronizing rod; 4. Square plate; 41. Inclined block; 411. Anti-slip rod. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] Example 1

[0025] This embodiment provides a device for connecting intravenous fluid exchange in intravenous therapy, such as... Figure 1-4 As shown, the connecting device includes an infusion tube 1 and a plug 2 fixedly inserted into the infusion tube 1. The plug 2 has an infusion hole 21 that communicates with the infusion tube 1.

[0026] To prevent air from entering the plug 2 through the infusion port 21, a sealing assembly 3 is provided on the plug 2. The sealing assembly 3 includes a lifting plate 31 that moves axially within the plug 2, a sealing plug 32 inserted into the infusion port 21 and fixedly connected to the lifting plate 31, a ring 33 that moves axially on the plug 2 and is connected to the lifting plate 31 for driving the lifting plate 31 to descend, and a spring 34 fitted onto the plug 2 and fixedly connected to the lower end of the ring 33 for driving the ring 33 to rise. The sealing assembly 3 effectively prevents external air from entering the plug 2 during fluid exchange, greatly reducing the risk of air embolism and significantly improving the safety of intravenous therapy. At the same time, the entire device is easy to operate; medical staff do not need to perform any additional complex operations. Simply inserting and unplugging the plug 2 automatically opens and seals the infusion port 21, improving fluid exchange efficiency. During use, hold plug 2 and insert the conical end of plug 2 into the rubber stopper on the infusion container. When the rubber stopper contacts the ring 33, as the insertion rod continues to move into the rubber stopper, the rubber stopper overcomes the elastic force of the spring 34 and compresses the spring 34 through the ring 33, causing it to contract and store force. At the same time, the ring 33 drives the lifting plate 31 and the sealing plug 32 to move closer to the infusion tube 1, so that the sealing plug 32 moves out of the infusion hole 21, allowing the liquid in the infusion container to enter the infusion tube 1 through the infusion hole 21. When changing the infusion, hold plug 2 and pull it out to the end away from the infusion container. At this time, as plug 2 moves, the ring 33 is pushed by the spring 34 to move closer to the container until plug 2 is pulled out. Under the action of the ring 33 and the spring 34, the lifting plate 31 drives the sealing plug 32 to insert into the infusion hole 21, completing the sealing of the infusion hole 21 and preventing external air from entering the interior of plug 2.

[0027] To facilitate the insertion of the sealing plug 32 into the infusion port 21, the sealing plug 32 is tapered, and the inner wall shape of the infusion port 21 matches the outer wall shape of the sealing plug 32. This tapered shape and matching inner wall shape of the infusion port 21 make it easier to align the sealing plug 32 during insertion, allowing for quick and accurate insertion, effectively improving sealing efficiency and reducing the probability of operational errors due to insertion difficulties. Since both the sealing plug 32 and the inner wall of the infusion port 21 are tapered, the guiding effect of the tapered shape allows the sealing plug 32 to automatically adjust its position and smoothly enter the infusion port 21 during the insertion process pushed by the spring 34, eliminating the need for additional precise alignment.

[0028] To improve the sealing effect of the sealing plug 32 on the infusion port 21, the sealing plug 32 is made of medical-grade silicone material. Medical-grade silicone material has excellent flexibility and elasticity, allowing it to tightly conform to the inner wall of the infusion port 21, greatly improving the sealing effect and effectively preventing air and liquid leakage. Furthermore, medical-grade silicone material is safe and non-toxic, meeting medical use standards and posing no additional health risks to patients. When the sealing plug 32 is inserted into the infusion port 21, the elasticity of the silicone material allows it to adapt to the shape of the inner wall of the infusion port 21, filling any possible tiny gaps and forming a tight seal, thus achieving a good sealing effect.

[0029] To facilitate the connection between the ring 33 and the lifting plate 31, a vertical groove 22 is provided on the plug 2. A synchronizing rod 35, fixedly connected to the lifting plate 31 and the ring 33, is slidably disposed inside the vertical groove 22. The design of the synchronizing rod 35 and the vertical groove 22 facilitates the connection between the ring 33 and the lifting plate 31, ensuring that the movement of the ring 33 is accurately transmitted to the lifting plate 31, keeping their movements synchronized and guaranteeing the stable operation of the sealing assembly 3. The synchronizing rod 35 slides within the vertical groove 22, with its two ends fixedly connected to the lifting plate 31 and the ring 33, respectively. When the ring 33 moves axially under the action of the spring 34 or the rubber plug, the synchronizing rod 35 slides along with the ring 33 within the vertical groove 22, thereby driving the lifting plate 31 to move synchronously, achieving accurate operation of the sealing plug 32.

[0030] To prevent liquid from flowing out of the vertical groove 22, a sealing plate 311 is slidably installed inside the plug 2 and fixedly connected to the lifting plate 31. The outer wall of the sealing plate 311 is in close contact with the inner wall of the plug 2. The sealing plate 311 effectively prevents liquid from flowing out of the vertical groove 22, avoiding potential pollution and waste caused by liquid leakage. The sealing plate 311 is fixedly connected to the lifting plate 31, and its outer wall is tightly fitted with the inner wall of the plug 2. When the lifting plate 31 moves axially within the plug 2, the sealing plate 311 also moves accordingly, always maintaining a sealing effect on the vertical groove 22 and preventing liquid from flowing out through the vertical groove 22.

[0031] Example 2

[0032] Unlike Embodiment 1, to facilitate the removal of the plug 2 from the rubber stopper of the infusion container, a square plate 4 is fixedly fitted to the bottom of the plug 2, and inclined blocks 41 are fixedly connected to the bottom of both sides of the square plate 4. The design of the square plate 4 and the inclined blocks 41 makes it easier for medical staff to remove the plug 2 from the rubber stopper of the infusion container. It increases the force application area and effect of the fingers, making the insertion and removal operation easier and less strenuous, reducing the difficulty and workload of medical staff. The inclined blocks 41 on both sides of the bottom of the square plate 4 form a triangular shape at the bottom of the square plate 4. This shape changes the point and direction of force application by the fingers, allowing medical staff to exert force more easily when removing the plug 2. Utilizing the stability and mechanical principles of the triangular structure, it is easier to remove the plug 2 from the rubber stopper.

[0033] To prevent slippage between fingers and the inclined block 41, an anti-slip rod 411 is fixedly installed on the inclined block 41. The anti-slip rod 411 effectively prevents slippage between fingers and the inclined block 41, ensuring the stability and safety of medical personnel when inserting or removing the plug 2, and avoiding operational errors or accidental injury to the patient due to slippage. The anti-slip rod 411 increases the friction between fingers and the inclined block 41. When a medical staff member's fingers grip the inclined block 41, the anti-slip rod 411 contacts the finger surface, increasing the roughness of the contact surface, thereby increasing friction and preventing finger slippage.

[0034] It should be noted that many of the standard parts used in this invention are available on the market, while non-standard parts can be specially customized. The connection method used in this invention is also a very common method in the mechanical field, which the inventor will not elaborate on here.

[0035] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. An intravenous fluid exchange connection device, comprising an infusion tube (1) and a plug (2) fixedly inserted into the infusion tube (1), wherein the plug (2) is provided with an infusion hole (21) communicating with the infusion tube (1). characterized in that The plug (2) is provided with a sealing assembly (3), which includes a lifting plate (31) that moves axially within the plug (2), a sealing plug (32) that is inserted into the infusion hole (21) and fixedly connected to the lifting plate (31), a ring (33) that moves axially on the plug (2) and is connected to the lifting plate (31) for driving the lifting plate (31) to descend, and a spring (34) that is fitted on the plug (2) and fixedly connected to the lower end of the ring (33) for driving the ring (33) to rise.

2. The intravenous therapy fluid exchange interface device of claim 1, wherein: The sealing plug (32) is in the shape of a conical rod, and the inner wall shape of the infusion hole (21) is consistent with the outer wall shape of the sealing plug (32).

3. The intravenous therapy fluid exchange interface device of claim 1, wherein: The sealing plug (32) is made of medical silicone material.

4. The intravenous therapy fluid exchange interface device of claim 1, wherein: The plug (2) has a vertical groove (22), and a synchronizing rod (35) is slidably arranged inside the vertical groove (22) and fixedly connected to the lifting plate (31) and the ring (33).

5. The intravenous therapy fluid exchange interface device of claim 1, wherein: The plug (2) is slidably provided with a sealing plate (311) that is fixedly connected to the lifting plate (31), and the outer wall of the sealing plate (311) is in contact with the inner wall of the plug (2).

6. The intravenous therapy fluid exchange interface device of claim 1, wherein: The bottom of the plug (2) is fixedly fitted with a square plate (4), and the bottom of both sides of the square plate (4) is fixedly connected with inclined blocks (41).

7. The intravenous therapy fluid exchange adapter of claim 6, wherein: An anti-slip rod (411) is fixedly installed on the inclined block (41).

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