Anti-reflux multi-way tube for transfusion

Abstract

The utility model discloses an anti-backflow multi-way tube for infusion, and relates to the technical field of medical equipment. In order to solve the problems that in the prior art, an anti-backflow structure and a filter are lacked, and the flow speed of liquid in a branch pipe is low, the anti-backflow multi-way pipe for infusion is mainly structurally characterized by comprising a main pipe used for infusion or blood transfusion and at least one branch pipe connected with the side portion of the main pipe and used for infusion. The three-way connectors correspond to the branch pipes and are arranged on the main pipe, and the branch pipes are communicated with the main pipe through the three-way connectors; the branch pipe is communicated with the main pipe through the three-way pipe joint, and the pipe diameter of the branch pipe is the same as that of the main pipe, so that the cross section of the branch pipe cannot be reduced, and the flow speed of liquid in the branch pipe cannot be reduced; the anti-reflux device is arranged on the branch pipe, so that the medicine is prevented from reversely flowing into the infusion bag; a liquid medicine filter used for filtering bubbles and tiny glass fragments difficult to perceive by naked eyes is arranged on the branch pipe, so that air embolism or danger is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an anti-backflow multi-port tubing for infusion. Background Technology

[0002] In the clinical treatment of critically ill patients, infusion pumps or micro-infusion pumps are frequently used to deliver specific medications into the intravenous vein. These pumps require a "three-way stopcock" to connect to the intravenous infusion needle or cannula. However, the clinical use of three-way stopcocks presents the following risks:

[0003] I. Medications administered via microinfusion pumps are often drugs that have a significant impact on human physiological functions (such as vasopressors or vasodilators). Microinfusion pumps can control the infusion rate of drugs to a very precise dose, injecting only a fraction of a milliliter to a few milliliters per hour. Intravenous infusions for critically ill patients often last from 24 hours to several days. In many cases, blockages can occur between the needle and the three-way valve. For example, during sleep, some patients may involuntarily move (such as turning over), compressing or folding the infusion tubing, leading to blockage. If the microinfusion pump continues to inject the medication during this time, the medication can flow back through the three-way valve into the maintenance fluid tubing or medication bag, accumulating there. If a patient involuntarily turns over again or if medical staff restore the flow of the blocked IV tubing, medication that has flowed back into the IV bag may be injected into the body within a short period of time. Since the medication that has flowed back into the IV bag may have accumulated for some time, the dosage of medication injected into the body per minute may increase many times after the flow is restored, causing drastic fluctuations in the patient's vital signs, harming the body, or even leading to the patient's death.

[0004] 2. Even without using a micro-infusion pump, patients sometimes need to connect several different medication bags to their infusion needles simultaneously. In such cases, a T-connector is required to connect the different infusion bags and needles. Because different fluid bags have different pressures, if the infusion tubing tip (patient end) is kinked, or due to medical staff errors such as forgetting to open the stopcock after it has been closed, or if the patient has lost too much blood or fluid and requires pressurized blood transfusion, blood or fluid in the main tubing (where the pressure increases after pressurization) may flow backward into the lower-pressure medication bag. This not only affects the efficacy of the treatment but may also cause chemical reactions of the medications, leading to other adverse effects. In addition, when using a T-connector for prolonged infusions, sometimes the needle or infusion tubing becomes detached from the T-connector without being detected, resulting in significant blood loss and unexpected complications.

[0005] Therefore, there is a need for a simple, easy-to-use infusion tee or multi-way tube that can prevent backflow.

[0006] Patent CN106730316B discloses an anti-backflow multi-port tubing for intravenous infusion, comprising: a main pipe and at least one drug delivery branch pipe disposed on the side of the main pipe; the upper end of the main pipe has an inlet for communication with the infusion tube, and the lower end of the main pipe has an outlet for communication with the infusion tube; the drug delivery branch pipe includes a tube body with one end communicating with the side of the main pipe, a plug channel disposed at the other end of the tube body, and a push plug disposed within the plug channel; the plug channel includes a cylindrical channel section and a conical channel section arranged sequentially from the outside to the inside; the push plug includes a plug cap, a cylindrical plug body and a conical plug body connected sequentially to the plug cap. The anti-backflow multi-port tubing of this invention, by setting a push plug and a plug channel within the drug delivery branch pipe, can maintain the airtightness of the drug delivery branch pipe during use, effectively preventing backflow of liquid within the drug delivery branch pipe, and has a simple structure and is easy to use.

[0007] The invention features a branch pipe that is directly connected to the main pipe, making the diameter of the branch pipe much smaller than that of the main pipe. As a result, the flow velocity inside the branch pipe is reduced due to its smaller cross-section, and no filter is installed. Utility Model Content

[0008] To address the above problems, the technical approach adopted by this utility model is as follows:

[0009] Connect the branch pipe to the main pipe using a tee fitting, ensuring that the diameter of the branch pipe is the same as that of the main pipe to prevent a decrease in flow velocity within the branch pipe; and install an anti-backflow device and a liquid filter for air filtration on the branch pipe.

[0010] The specific plan is as follows:

[0011] An anti-backflow multi-port tubing for intravenous infusion includes a main tube for intravenous or blood transfusion and at least one branch tube connected to the side of the main tube for intravenous infusion. It also includes a tee connector corresponding to the branch tube, which is disposed on the main tube. The branch tube is connected to the main tube through the tee connector. The branch tube is provided with an anti-backflow device and a drug filter for filtering air bubbles. The anti-backflow device is disposed on the side closer to the main tube, and the drug filter is disposed on the side farther away from the main tube.

[0012] Preferably, the anti-backflow device is a one-way valve.

[0013] Furthermore, the outlet end of the main pipe is connected to a cap.

[0014] In a preferred embodiment, the inlet end of the branch pipe and the inlet end of the main pipe are respectively connected to an infusion connector.

[0015] Optionally, the main pipe and the branch pipe are each provided with a flow stop clamp.

[0016] Furthermore, the diameter of the branch pipe is the same as the diameter of the main pipe.

[0017] By adopting the above technical solution, this utility model has the following technical effects:

[0018] An anti-backflow multi-port tubing for intravenous infusion includes a main tube for intravenous or blood transfusion and at least one branch tube connected to the side of the main tube for intravenous infusion. It also includes a tee fitting corresponding to the branch tube, which is located on the main tube. The branch tube is connected to the main tube through the tee fitting. The branch tube is equipped with an anti-backflow device and a drug filter for filtering air bubbles. The anti-backflow device is located on the side closer to the main tube, and the drug filter is located on the side farther away from the main tube.

[0019] The branch tube is connected to the main tube via a three-way connector, ensuring that the branch tube's diameter is the same as the main tube's. This prevents the branch tube's cross-section from shrinking, thus maintaining the proper flow rate of the fluid within the branch tube. An anti-backflow device is installed on the branch tube to prevent medication from flowing back into the infusion bag, reducing safety risks. A medication filter is also installed on the branch tube to filter air bubbles and tiny glass fragments that are difficult to detect with the naked eye, preventing air or small glass fragments from entering the vein and causing air embolism or other hazards. A needleless, sealed infusion connector is used to reduce the risk of bloodborne infections from occupational exposure caused by needlestick injuries to nursing staff. This utility model of an anti-backflow multi-port infusion tubing has a high safety factor and can be widely used. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0021] Figure 1 This is a schematic diagram of the structure of the anti-backflow multi-port tubing for infusion provided in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the anti-backflow multi-port tubing for infusion provided in the embodiments of this application;

[0023] Figure 3 This is a perspective view of the infusion connector provided in the embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the liquid outlet end provided in the embodiment of this application;

[0025] Figure 5 This is a diagram of an existing multi-port infusion tubing system;

[0026] Icons: Main pipe 1; End cap 11; Outlet end 12; Branch pipe 2; Anti-backflow device 21; Drug filter 22; T-connector 3; Infusion connector 4; Connector housing 41; Connector inner core 42; Slit 43; Flow stop clamp 5. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the appendices in the embodiments of this application will be described below. Figure 1-4 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” should be interpreted broadly. Example

[0031] The inventors discovered that clinically used three-way tubing connecting different infusion bags and needles lacks an anti-backflow structure, making it easy for medication to flow back into the infusion bag and be injected into the body within a short time, causing harm or even death. In existing patents, the branch tube is directly connected to the main tube, making its diameter much smaller than the main tube's. This results in a smaller cross-section for the branch tube, reducing the flow rate; furthermore, no filter is included. Therefore, this application provides an anti-backflow multi-way tubing for infusion that prevents backflow, enables filtration, and does not reduce the fluid flow rate.

[0032] In the embodiments of this application, please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the anti-backflow multi-port tubing for infusion provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the anti-backflow multi-port tubing for intravenous infusion provided in an embodiment of this application. The anti-backflow multi-port tubing for intravenous infusion includes a main pipe 1 for intravenous infusion or blood transfusion and at least one branch pipe 2 connected to the side of the main pipe 1 for intravenous infusion. It also includes a tee connector 3 corresponding to the branch pipe 2, which is disposed on the main pipe 1. The branch pipe 2 is connected to the main pipe 1 through the tee connector 3. The branch pipe 2 is provided with an anti-backflow device 21 and a drug filter 22 for filtering air bubbles. The anti-backflow device 21 is disposed on the side closer to the main pipe 1, and the drug filter 22 is disposed on the side away from the main pipe 1.

[0033] The branch pipe 2 is connected to the main pipe 1 through a three-way connector, so that the diameter of the branch pipe 2 is the same as that of the main pipe 1. In this way, the cross-section of the branch pipe 2 will not be reduced, so as to ensure that the liquid flow rate in the branch pipe 2 will not decrease. An anti-backflow device 21 is installed on the branch pipe 2 to prevent the medication from flowing back into the infusion bag and reduce safety risks. A medication filter 22 is installed on the branch pipe 2 to filter out air bubbles and tiny glass fragments that are not visible to the naked eye, so as to prevent air or tiny glass fragments from being injected into the human vein and causing air embolism or danger. A needleless closed infusion connector 4 is used to reduce the risk of bloodborne infection caused by occupational exposure to needlestick injuries for nursing staff.

[0034] The main tube 1 is a transparent hollow tube with an inlet end at the top and an outlet end (i.e., the patient end) at the bottom. At least one tee connector is connected in the middle. The number of tee connectors is the same as the number of branch tubes 2 required.

[0035] T-type pipe fittings are common existing technology, commonly including T-type and Y-type, with Y-type having good conformability being preferred. This is something that those skilled in the art can implement. For example, there are Y-type tees on the market that use the Jawe brand, which are the same as the tee fittings in this application. Since they are existing technology, this application does not make any specific improvements to the tee fittings, and will not elaborate further here.

[0036] The connection method between the main pipe 1 and the tee connector is as follows: the main pipe 1 is cut in the cross-sectional direction, and the two cut ends formed are respectively bonded to the upper and lower ports on the vertical side of the tee connector or integrally formed, so as to avoid the tee connector from detaching from the main pipe 1, which could lead to accidental blood loss in the patient.

[0037] The connection method between branch tube 2 and the tee connector is as follows: one end of branch tube 2 is bonded to or integrally formed with the inclined port of the tee connector to prevent the tee connector from detaching from branch tube 2, which could lead to unexpected blood loss in the patient.

[0038] It should be noted that the diameter of branch pipe 2 is the same as that of main pipe 1. This ensures that the cross-section of branch pipe 2 will not be reduced, thus guaranteeing that the liquid flow rate in branch pipe 2 will not decrease.

[0039] This utility model can be equipped with multiple branch pipes 2 and matching tee pipe connectors to achieve "tee", "four", "five" connections, etc., thereby facilitating the injection of various drugs.

[0040] The materials of branch tube 2 and main tube 1 are the same as those of common infusion tubing. This application does not limit the length of branch tube 2 and main tube 1. Those skilled in the art should make adjustments according to market demand.

[0041] The liquid filter 22 employs an existing precision filter, featuring a hollow, wheel-shaped outer shell. The upper and lower parts of the shell have hollow tubular inlet and outlet ports, respectively, that communicate with the interior of the shell. An internal filter membrane is housed within the shell, with nominal pore sizes typically of 3 micrometers or 5 micrometers. Liquid flowing from the top of the filter passes through the internal filter membrane before exiting the filter. The pore sizes of 3 and 5 micrometers are extremely small for a single air bubble, sufficient to block much larger bubbles. The trapped air is then released through an exhaust port. This is a common, existing technology, readily achievable by those skilled in the art, and will not be elaborated upon here.

[0042] The connection between the branch pipe 2 and the liquid filter 22 is as follows: the branch pipe 2 is cut in the cross-sectional direction, and the two cut ends formed are bonded or integrally formed with the cut end on the side closer to the main pipe 1 and the outlet end interface of the liquid filter 22, and the cut end on the side farther away from the main pipe 1 is bonded or integrally formed with the inlet end interface of the liquid filter 22.

[0043] Preferably, the anti-backflow device 21 is a one-way valve, which is a common prior art that can be implemented by those skilled in the art. For example, the diaphragm check valve of model X32 under the Xingyuan brand is available on the market and is the same as the one-way valve in this application. Since it is prior art, this application does not make specific improvements to the one-way valve and will not elaborate further here.

[0044] The connection method between branch pipe 2 and check valve is as follows: branch pipe 2 is cut in the cross-sectional direction, and the two cut ends formed are bonded or integrally formed with the outlet end of check valve on the side closer to main pipe 1, and bonded or integrally formed with the inlet end of check valve on the side farther away from main pipe 1.

[0045] In the embodiments of this application, please refer to Figure 3 , Figure 3 This is a perspective view of the infusion connector provided in this application embodiment. The inlet ends of the branch tube 2 and the main tube 1 are respectively connected to infusion connectors 4. The infusion connector 4 adopts the existing needleless sealed infusion connector model. The infusion connector 4 includes a connector shell 41 and a connector core 42. The connector shell is hollow and integrally formed, with a thick cylindrical shape in the middle, a short cylindrical shape with external threads at the top for threaded connection with the infusion tubing, and a long cylindrical shape at the bottom for fitting with the inlet end of the main tube or branch tube. The connector core is made of soft plastic or rubber, is a solid frustum shape, and is placed inside the connector shell to ensure that the connector core will not come out of the connector shell. A slit 43 is opened on the side of the connector core away from the inlet end, and the slit communicates with the inside of the main tube or branch tube through the connector shell. When not in use, the slit is closed to prevent dust. When in use, the tip of the syringe is inserted into the slit for injection, making it convenient to use.

[0046] This connector design reduces the risk of bloodborne infections caused by occupational exposure to needlestick injuries for nursing staff, reduces the workload of nursing staff in aseptically placing infusion caps, avoids contamination caused by improper placement of infusion caps, and makes needle-free closed infusion technology more hygienic.

[0047] For example, there are needleless infusion connectors on the market that use the B. Braun brand, which are the same as the infusion connector 4 in this application. Since they are existing technologies, this application will not make any specific improvements to the infusion connector 4, and will not elaborate further here.

[0048] In the embodiments of this application, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the liquid outlet end provided in the embodiment of this application. In this application, the liquid outlet end of the main tube adopts the liquid outlet end 12 of the disposable extension tube under the Yixintang brand in the prior art. The side near the liquid inlet end is plate-shaped, which is convenient for medical staff to hold. The side near the liquid outlet end is a fixed end that is fixedly connected to the main tube. The inside of the fixed end is connected to the inside of the main tube, and the inner wall of the fixed end has internal threads for threaded connection with the end cap.

[0049] The end cap 11 is integrally molded. The middle part is a thick cylindrical shape with anti-slip texture, which makes it easy for medical staff to hold and pull off. The side near the liquid outlet 12 is a long cylindrical shape, which is used to insert into the fixed end and connect with it with a thread. The side away from the liquid outlet is a closed short cylindrical shape, which is used to prevent dust.

[0050] When the end cap 11 is locked to the outlet end, the main pipe inside the fixed end fits against the inner wall of the short cylindrical side of the end cap 11, forming a seal. In use, the end cap 11 is removed before applying this invention. The end cap 11 can be any existing end cap from the Yixintang brand used with extension tubes. Since this is prior art, this application does not make specific improvements to the end cap 11, and details are omitted here.

[0051] To facilitate stopping the infusion, a flow stop clamp 5 is fitted on the side of the main pipe 1 near the infusion connector 4 and on the side of the branch pipe 2 near the check valve. The flow stop clamp 5 can be a Robert clamp commonly used in the prior art, which can be implemented by those skilled in the art, and will not be described in detail here.

[0052] It should be noted that main pipe 1 can be connected to blood transfusion lines. In order to enable rapid blood transfusion in case of massive bleeding, no filter or check valve is installed.

[0053] Application process

[0054] 1. Hang the IV bottle upside down on the stand to expel the air from the IV tubing.

[0055] 2. Insert the infusion tubing into the female end of infusion connector 4.

[0056] 3. Release the flow stop clamp 5. The liquid passes through the liquid filters and check valves of main pipe 1 and branch pipe 2, and collects at the outlet of main pipe 1.

[0057] 4. Remove the end cap 11 and connect the outlet of the main tube 1 to the patient.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An anti-backflow multi-port tubing for intravenous infusion, comprising a main tube (1) for intravenous infusion or blood transfusion and at least one branch tube (2) connected to a side of the main tube (1) for intravenous infusion, characterized in that, It also includes a tee connector (3) corresponding to the branch pipe (2), which is provided on the main pipe (1), and the branch pipe (2) is connected to the main pipe (1) through the tee connector (3); The branch pipe (2) is provided with an anti-backflow device (21) and a medicine filter (22) for filtering air bubbles. The anti-backflow device (21) is located on the side close to the main pipe (1), and the medicine filter (22) is located on the side away from the main pipe (1).

2. The anti-backflow multi-port tubing for infusion according to claim 1, characterized in that, The backflow preventer (21) is a one-way valve.

3. The anti-backflow multi-port tubing for infusion according to claim 1, characterized in that, The outlet end of the main pipe (1) is connected to a cap (11).

4. The anti-backflow multi-port tubing for infusion according to claim 1, characterized in that, The inlet end of the branch pipe (2) and the inlet end of the main pipe (1) are respectively connected to the infusion connector (4).

5. The anti-backflow multi-port tubing for infusion according to claim 1, characterized in that, The main pipe (1) and the branch pipe (2) are respectively provided with flow stop clamps (5).

6. The anti-backflow multi-port tubing for infusion according to claim 1, characterized in that, The diameter of the branch pipe (2) is the same as the diameter of the main pipe (1).

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