Multifunctional switching device for central venous access blood sampling

Abstract

The utility model discloses a multifunctional switching device for central venous access blood sampling, which comprises a three-way pipe with a built-in switching valve, the three-way pipe comprises a main pipe and a first branch pipe, one end of the main pipe is a connecting end, the other end of the main pipe is a blood sampling end, and the first branch pipe is arranged on the circumferential surface of the main pipe. The main pipe is switched between the blood sampling end and the first branch pipe through the change-over valve; the connecting end of the main pipe is used for being connected with a venous catheter, a second branch pipe is externally connected to the position, between the connecting end and the change-over valve, of the circumferential face of the main pipe, the second branch pipe is used for injecting pipe washing liquid into the main pipe, and the second branch pipe is provided with a sealing cover. The first branch pipe is used for being connected with an injector, and the injector is used for push-pull mixing of blood in the main pipe; a puncture needle is arranged at the blood sampling end of the main tube and used for being connected into a vacuum blood sampling tube. The device provided by the utility model can effectively improve the blood sampling efficiency of medical staff aiming at a patient needing frequent puncture and blood sampling.

Description

Technical Field

[0001] This utility model belongs to the field of medical auxiliary equipment, and in particular relates to a multifunctional adapter for central venous access blood collection. Background Technology

[0002] Venous blood sample collection is widely used in clinical practice and is an important basis for disease diagnosis and treatment. Currently, blood collection methods include direct venipuncture, indwelling venous catheterization, and central venous access.

[0003] Central venous access is increasingly widely used in clinical practice. Blood collection via central venous access has a high success rate and eliminates the pain of repeated punctures for patients; its feasibility has been confirmed both domestically and internationally. Currently, blood collection via central venous access includes the reinfusion method, the blood discarding method, and the push-pull mixing method. Among these, the push-pull mixing method avoids the disadvantages of blood discarding and infection caused by blood reinfusion, and has a higher safety profile.

[0004] The steps of the push-pull mixed blood collection method are as follows: after connecting the syringe and the catheter to form a closed system, 4-6 ml of blood is drawn back into the syringe, and then the blood is pushed back into the patient's body. After repeating the operation 4 times, the blood sample can be collected. After blood collection, the catheter is flushed with 10 ml of 0.9% sodium chloride injection.

[0005] Under current technology, the procedure involves first disconnecting the IV connector, connecting the syringe to the catheter, and then mixing the blood by pushing and pulling. Next, the syringe is removed, and a blood collection needle is connected to the catheter for blood collection. After collection, the needle is removed, and the catheter is flushed with a syringe containing saline solution before connecting a new IV connector. This blood collection process presents the following problems: ① Repeated catheter connections can easily lead to contamination at the connection point, potentially causing bloodstream infections; ② The procedure is cumbersome, impacting nurses' efficiency.

[0006] Patent document CN216496833U discloses an improved infusion three-way valve, including a three-way valve body (1), and an anti-detachment docking device (2) is provided at the port of the three-way valve body (1). The three-way valve body (1) includes a first liquid passage (11), and a second liquid passage (12) is provided on both sides of the first liquid passage (11). A sealing component (15) is provided at the port of the second liquid passage (12). Summary of the Invention

[0007] The purpose of this invention is to provide a multifunctional adapter for central venous access blood collection, which can effectively improve the blood collection efficiency of medical staff for patients who require frequent punctures.

[0008] To achieve the purpose of this utility model, the following technical solution is provided: a multifunctional transfer device for central venous access blood collection, including a three-way pipe with a built-in switching valve, the three-way pipe including a main pipe with one end as a connection end and the other end as a blood collection end, and a first branch pipe provided on the periphery of the main pipe, the main pipe switching between the blood collection end and the first branch pipe through the switching valve;

[0009] The connecting end of the main tube is used to connect to the intravenous catheter. A second branch tube is connected to the outer periphery of the main tube between the connecting end and the switching valve. The second branch tube is used to inject flushing fluid into the main tube. The second branch tube has a sealing cap.

[0010] The first branch tube is used to connect to a syringe, which is used for pushing and pulling to mix the blood in the main tube;

[0011] The blood collection end of the main tube is equipped with a puncture needle for connecting to a vacuum blood collection tube.

[0012] This invention simplifies the steps of venous blood collection by using a multi-channel switching method, while also meeting the aseptic requirements of the blood collection process.

[0013] Specifically, the first branch pipe and the second branch pipe are respectively arranged on both sides of the main pipe to optimize the connection position of the negative pressure device and the injection flushing fluid device.

[0014] Specifically, the connecting end of the main tube is provided with external threads for fixing the venous catheter to ensure a seal between the venous catheter and the main tube.

[0015] Specifically, the second branch tube interface is provided with a one-way membrane structure to prevent blood backflow, thus preventing blood in the main tube from flowing back into the second branch tube and ensuring the sealing of the second branch tube.

[0016] Specifically, the puncture needle includes a mounting base on the blood collection end, a needle fixed on the mounting base for connecting the main tube to the outside, and a protective sleeve on the mounting base for protecting the needle and fixing the vacuum blood collection tube, so as to ensure that the needle will not accidentally injure other people or bend due to external force during use.

[0017] Specifically, the needle is also covered with a rubber protective sleeve to ensure its sterility.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] By switching between multiple channels, the number of times the venous catheter is connected can be reduced to lower the risk of infection, while also reducing the pain experienced by the patient during puncture. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the structure of the multifunctional adapter provided in this embodiment;

[0021] Figure 2 This is a top view of the structure of the multifunctional adapter provided in this embodiment;

[0022] Figure 3 This is a left view of the structure of the multifunctional adapter provided in this embodiment;

[0023] In the diagram, 1. Main tube; 2. Connecting end; 3. First branch tube; 4. Second branch tube; 5. Switching valve; 6. Blood collection end; 7. Mounting base; 8. Needle; 9. Protective sleeve; 10. Rubber protective sleeve; 11. One-way membrane structure. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] like Figure 1 As shown, this embodiment provides a multifunctional adapter for blood collection via a central venous access. Existing methods typically involve first connecting a syringe to the intravenous catheter and performing a push-pull aspiration and mixing operation on the blood. Then, the syringe is removed, and a blood collection needle is connected for blood collection. Finally, the blood collection needle is removed and reconnected for pre-filling to flush the tubing. However, existing methods suffer from the risk of external infection due to repeated disassembly and reassembly of infusion connectors. Furthermore, the increased frequency of contact between the patient's blood and medical personnel during the procedure further amplifies the risk of bloodborne infection for medical staff.

[0026] Therefore, in order to solve the above-mentioned technical problems, this embodiment provides the following specific solution: Figure 1As shown, a multifunctional adapter for central venous access blood collection includes a three-way tube with a built-in conversion valve 5. The three-way tube includes a main tube 1 and a first branch tube 3 disposed on the circumference of the main tube 1. The two ends of the main tube are respectively designated as a connecting end 2 and a blood collection end 6. The connecting end 2 is used to connect to the venous catheter, and the blood collection end 6 is equipped with a puncture needle and is connected to the vacuum blood collection tube through the puncture needle.

[0027] The connecting end 2 of the main tube 1 is provided with external threads to make a threaded connection with the connecting venous catheter, thereby ensuring a stable and sealed connection.

[0028] like Figure 2 As shown, the first branch pipe 3 and the second branch pipe 4 are respectively arranged on both sides of the main pipe 1 to avoid affecting the fixation of the main pipe 1 after the two external devices are connected.

[0029] like Figure 3 As shown, the main pipe switches between the blood collection end 6 and the first branch pipe 3 via the switching valve 5. In addition, a second branch pipe 4 is connected to the outer surface of the main pipe between the connection end and the switching valve. The second branch pipe 4 is used to inject flushing fluid into the main pipe 1. The second branch pipe 4 is equipped with a sealing cap to ensure that the blood collection process does not affect the blood flow direction in the main pipe 1.

[0030] More specifically, a one-way membrane structure 11 is provided at the interface of the second branch tube 4. The lateral interface of the one-way membrane structure 11 is in the shape of "<" and is 5mm away from the interface of the second branch tube 4, which is the same length as the nipple of a conventional syringe. Together with the sealing cap on the second branch tube 4, it controls the second branch tube to be in a sealed state when not in use and prevents blood from flowing back into the second branch tube 4 when the blood collection end of the first branch tube 3 and the main tube 1 is working.

[0031] In this embodiment, the puncture needle is a split type, that is, the puncture needle and the main tube 1 are connected by a thread, thereby further ensuring the aseptic requirements between the devices.

[0032] The puncture needle includes a mounting base 7 on the blood collection end 6, a needle 8 fixed on the mounting base 7 for connecting the main tube 1 to the outside, and a protective sleeve 9 on the mounting base 7 for protecting the needle 8 and fixing the vacuum blood collection tube.

[0033] The protective sleeve 9 is slightly larger than the size of a conventional vacuum blood collection tube, thus facilitating the insertion of the vacuum blood collection tube.

[0034] In addition, the needle 8 in this embodiment is also covered with a rubber protective sleeve 12, which not only ensures a sterile environment for the needle, but also prevents the needle from pricking the operator or patient.

[0035] The following operating methods are provided for the multi-functional adapter device provided in this embodiment:

[0036] Obtain a brand new three-way stopcock, connect the main connector of the three-way stopcock to the patient's intravenous catheter, attach the puncture needle to the blood collection end, and then connect the connector to the first branch tube through the switching valve, while the second branch tube is sealed with a sealing cap.

[0037] Open the sealing cap of the first branch tube and connect the syringe used for drawing negative pressure through the first branch tube. Aspirate back and forth three times to ensure that the blood is mixed.

[0038] After the blood is mixed, the connecting end is connected to the blood collection end through the switching valve. The blood collection end then guides the blood in the main tube to the vacuum blood collection tube under negative pressure through the needle to complete the blood collection task.

[0039] After completing the blood collection task, switch to the connection end and connect to the first branch tube. Open the sealed canister of the second branch tube and connect the flushing fluid syringe. Fill the tube with flushing fluid to ensure that the blood at the venous catheter is cleaned. Finally, separate the device from the venous catheter.

[0040] In addition, if the central venous catheter becomes blocked, making it difficult to collect enough blood samples using only the negative pressure of the vacuum blood collection tube, or if it is difficult to collect enough blood samples due to the blockage of the central venous catheter, the switching valve is turned to connect the first branch tube and the main tube. By pulling the syringe outward, an outward pulling force is applied to remove the blockage and allow blood to flow out. At this time, the switching valve is turned to ensure a smooth connection between the blood collection end and the main tube, and the blood collection task can continue.

[0041] After completing the blood collection task, turn the switching valve to prevent the first branch tube and the blood collection end from connecting to the main tube, ensuring that only the second branch tube is connected to the main tube. Open the sealed container of the second branch tube and connect it to the flushing solution syringe. Fill the flushing solution to ensure that the blood at the venous catheter is thoroughly flushed. Finally, separate the device from the venous catheter.

[0042] Furthermore, the terms "upper," "lower," "inner," "outer," "front," and "rear" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this invention.

[0043] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A multifunctional adapter for central venous access blood collection, characterized in that, The device includes a three-way pipe with a built-in switching valve. The three-way pipe includes a main pipe with one end as a connection end and the other end as a blood collection end, and a first branch pipe provided on the periphery of the main pipe. The main pipe is switched between the blood collection end and the first branch pipe by the switching valve. The connecting end of the main tube is used to connect to the intravenous catheter. A second branch tube is connected to the outer periphery of the main tube between the connecting end and the switching valve. The second branch tube is used to inject flushing fluid into the main tube. The second branch tube has a sealing cap. The first branch tube is used to connect to a syringe, which is used for pushing and pulling to mix the blood in the main tube; The blood collection end of the main tube is equipped with a puncture needle for connecting to a vacuum blood collection tube.

2. The multifunctional adapter for central venous access blood collection according to claim 1, characterized in that, The first branch pipe and the second branch pipe are respectively arranged on both sides of the main pipe.

3. The multifunctional adapter for central venous access blood collection according to claim 1, characterized in that, The connecting end of the main tube is provided with external threads for securing the connection of the venous catheter.

4. The multifunctional adapter for central venous access blood collection according to claim 1, characterized in that, The second branch tube interface is equipped with a one-way membrane structure to prevent blood backflow.

5. The multifunctional adapter for central venous access blood collection according to claim 1, characterized in that, The puncture needle includes a mounting base on the blood collection end, a needle fixed on the mounting base for connecting the main tube to the outside, and a protective sleeve on the mounting base for protecting the needle and fixing the vacuum blood collection tube.

6. The multifunctional adapter for central venous access blood collection according to claim 5, characterized in that, The needle is also covered with a rubber protective sleeve.

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