A leukocyte removal filter device

Abstract

The utility model discloses a kind of leukocyte removal filter devices, including two side-by-side setting bag insertion needle, the bag insertion needle is the bag insertion needle of ventilation exhaust, two the bag insertion needle is connected through three-way pipe fitting again through connecting conduit sequentially connect leukocyte removal filter and blood transfusion dropper, the blood transfusion dropper is connected infusion device through liquid outlet pipe, flow regulator is provided on the liquid outlet pipe.The utility model integrates bedside leukocyte removal filter device and blood transfusion device, integrates bedside leukocyte removal filter and blood transfusion device function, easy to operate;It can reduce one open exposure process, avoid the risk of puncture and pollution caused by repeated puncture, improve the safety of blood components;Blood resources can also be fully utilized, to avoid waste.

Description

Technical Field

[0001] This utility model relates to a medical filtration device, and more particularly to a leukocyte removal filtration device. Background Technology

[0002] Blood transfusion remains an essential and irreplaceable clinical treatment. Leukocyte removal from blood components can improve their preservation time, reduce febrile non-hemolytic reaction (FNHTR), inhibit or delay HLA alloimmunization, and decrease post-transfusion graft-versus-host disease (GVHD), among other harmful adverse reactions. Therefore, leukocyte-removed blood products are preferred for transfusion. Leukocyte removal filters primarily remove leukocytes from the blood through sieving and adsorption, a simple, easy, and effective method that has been widely adopted. Currently, there are two main methods for leukocyte removal: bedside filtration and pre-storage filtration. However, existing bedside leukocyte removal filtration devices have difficulty venting, and blood in the pre-filter blood bag and filter cannot be completely drained, resulting in wasted blood resources. Furthermore, additional transfusion sets are still required after filtration, increasing the risk of contamination. Therefore, existing technologies require further improvement. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a leukocyte removal filtration device that can reduce the open exposure process, avoid the risk of puncture and contamination caused by repeated punctures, and improve the safety of blood components; it can also make full use of blood resources and avoid waste.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is to provide a leukocyte removal filtration device, including two side-by-side insertion needles, which are ventilated insertion needles. The two insertion needles are connected by a three-way fitting and then connected to a leukocyte removal filter and a blood transfusion drip chamber in sequence through a connecting conduit. The blood transfusion drip chamber is connected to an infusion device through an outlet pipe, and a flow regulator is provided on the outlet pipe.

[0005] Furthermore, the insert needle includes a needle cap, a double-winged three-channel needle body, an air filter membrane, and an air plug with a top cover; the air channel of the double-winged three-channel needle body is located at the upper end of the double wings, the air filter membrane is bonded to the step inside the air channel, and the air plug with a top cover is bonded inside the air channel.

[0006] Furthermore, the air filter membrane is a double-layered polytetrafluoroethylene filter membrane, with each polytetrafluoroethylene filter membrane having a pore size of less than 0.03 μm.

[0007] Furthermore, the catheter connector of the insertion needle is connected to a tee fitting via an inlet pipe, and a flow stop clamp is provided on the inlet pipe.

[0008] Furthermore, the dual-wing three-channel needle body is integrally injection molded, and the air plug with the top cover is integrally injection molded.

[0009] Furthermore, the infusion device includes a drug injector, a Luer connector, and a transfusion needle, wherein the drug injector and the transfusion needle are connected to the outlet tube via a Y-type three-way connector.

[0010] Furthermore, a protective sleeve is provided on the outside of the Luer connector.

[0011] Compared with the prior art, the present invention has the following advantages: The novel leukocyte removal filtration device provided by the present invention integrates the bedside leukocyte removal filtration device and the blood transfusion set, combining the functions of the bedside leukocyte removal filter and the blood transfusion set into one, which is convenient to operate; it can reduce the open exposure process, avoid the risk of puncture and contamination caused by repeated punctures, and improve the safety of blood components; it can also make full use of blood resources and avoid waste. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the leukocyte removal filtration device according to an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the insert needle structure of the leukocyte removal filtration device of this utility model.

[0014] The diagram is marked as follows:

[0015] 1. Needle cap; 2. Double-winged three-channel needle body; 3. Air plug with cap; 4. Air filter membrane; 5. Catheter connector; 6. Air plug cap; 7. Insert needle; 8. Flow stop clamp; 9. First inlet tube; 10. Second inlet tube; 11. T-fitting fitting; 12. Leukocyte-removing filter; 13. Blood transfusion drip chamber; 14. Outlet tube; 15. Flow regulator; 16. Y-type tee tube; 17. Blood transfusion needle; 18. Medication syringe; 19. Luer connector; 20. Protective sleeve. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the leukocyte removal filtration device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the insert needle structure of the leukocyte removal filtration device of this utility model.

[0018] Please see Figure 1 and Figure 2The leukocyte removal filtration device of this utility model includes two side-by-side insertion needles 7, which are ventilated insertion needles. The two insertion needles are connected by a three-way fitting 11 and then connected to a leukocyte removal filter 12 and a blood transfusion drip chamber 13 in sequence through a connecting conduit. The blood transfusion drip chamber 13 is connected to an infusion device through an outlet pipe 14, and a flow regulator 15 is provided on the outlet pipe 14.

[0019] The leukocyte removal filtration device of this embodiment is equipped with multiple insertion needles 7 to meet the needs of multiple infusions. Each insertion needle 7 includes a needle cap 1, a double-winged three-channel needle body 2, an air filter membrane 4, and an air plug 3 with a cap. The air channel of the double-winged three-channel needle body 2 is located at the upper end of the double wings. The air filter membrane 4 is bonded to a step within the air channel, and the air plug 3 with a cap is bonded within the air channel, further securing the air filter membrane 4. Preferably, the double-winged three-channel needle body 2 and the air plug 3 with a cap are integrally injection molded. The air filter membrane 4 is a double-layered polytetrafluoroethylene (PTFE) filter membrane, preferably a hydrophobic PTFE filter membrane with a pore size of less than 0.03 μm for each layer. The entire filtration device can withstand high-temperature and high-pressure steam sterilization, ensuring overall sterility and pyrogen-free operation; achieving sterile ventilation and exhaust, maximizing the utilization of blood resources and reducing waste.

[0020] In this embodiment of the leukocyte removal filtration device, the catheter connector 5 of the bag insertion needle 7 is connected to a three-way fitting 11 via an inlet pipe, for example... Figure 1 The infusion device includes a first inlet tube 9 or a second inlet tube 10, with a flow stop clamp 8 installed on the inlet tube. The infusion device comprises a drug injector 18, a Luer connector 19, and a transfusion needle 17. The drug injector 18 and the transfusion needle 17 are connected to an outlet tube 14 via a Y-type tee tube 16. A protective sleeve 20 is provided on the outside of the Luer connector 19.

[0021] In use, the leukocyte removal filtration device of this invention involves removing the needle sheath 1 from one of the insertion needles and inserting it into the transfusion port of the blood component storage bag. The blood component storage bag is then placed upright, and the air plug cover 6 on the insertion needle is opened to allow a small amount of air to enter the storage bag after being filtered through the air filter membrane 4. The air plug cover 6 is then closed. This allows as much of the blood component in the storage bag as possible to flow out, making full use of blood resources.

[0022] When using the device, suspend the blood storage bag as required, allowing the blood components to flow smoothly into the infusion unit after being filtered through the leukocyte-reducing filter. Following relevant requirements, connect the infusion device to the patient's blood vessel via the infusion needle or Luer connector to initiate the blood transfusion. For other blood or medication infusions, connections can be made via other insertion needles.

[0023] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A leukocyte removal filtration device, characterized in that, It includes two side-by-side insertion needles (7), which are ventilated insertion needles. The two insertion needles are connected by a three-way fitting (11) and then connected to a leukocyte removal filter (12) and a blood transfusion drip chamber (13) in sequence through a connecting conduit. The blood transfusion drip chamber (13) is connected to an infusion device through an outlet pipe (14), and a flow regulator (15) is provided on the outlet pipe (14).

2. The leukocyte removal filtration device as described in claim 1, characterized in that, The insert needle (7) includes a needle cap (1), a double-wing three-channel needle body (2), an air filter membrane (4), and an air plug (3) with a cover; the air channel of the double-wing three-channel needle body (2) is set at the upper end of the double wings, the air filter membrane (4) is bonded to the step inside the air channel, and the air plug (3) with a cover is bonded inside the air channel.

3. The leukocyte removal filtration device as described in claim 2, characterized in that, The air filter membrane (4) is a double-layer polytetrafluoroethylene filter membrane, and the pore size of each polytetrafluoroethylene filter membrane is less than 0.03 μm.

4. The leukocyte removal filtration device as described in claim 2, characterized in that, The conduit connector (5) of the insert needle (7) is connected to a three-way fitting (11) through an inlet pipe, and a flow stop clamp (8) is provided on the inlet pipe.

5. The leukocyte removal filtration device as described in claim 2, characterized in that, The double-wing three-channel needle body (2) is integrally injection molded, and the air plug (3) with the top cover is integrally injection molded.

6. The leukocyte removal filtration device as described in claim 1, characterized in that, The infusion device includes a drug injector (18), a Luer connector (19), and a blood transfusion needle (17), and the drug injector (18) and the blood transfusion needle (17) are connected to the outlet tube (14) through a Y-type three-way tube (16).

7. The leukocyte removal filtration device as described in claim 6, characterized in that, The Luer connector (19) is provided with a protective sleeve (20).

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