Blood oxygenation device special for in-vitro cardiopulmonary auxiliary support system

Abstract

The utility model relates to the technical field of blood oxygenation devices, in particular to a blood oxygenation device special for an in-vitro cardiopulmonary auxiliary support system, which is in a hollow cylinder shape and comprises an outer shell and an inner shell, the diameter and the height of the inner shell are both smaller than those of the outer shell, and a plurality of layers of hollow fiber membranes in different directions are wound between the inner shell and the outer shell. The hollow fiber membranes at the two ends of the inner shell are plugged through polyurethane plugging layers, a gas outflow channel is arranged in a gap between the polyurethane plugging layers and the outer shell at the lower end, a gas inflow channel is arranged in a gap between the polyurethane plugging layers and the outer shell at the upper end, and the blood inflow channel directly penetrates into the hollow fiber membranes from the lower end of the outer shell. The blood outflow channel is arranged at the upper end of the outer shell and connected with the hollow fiber membrane. A blood stationary area is remarkably reduced, the oxygenation efficiency of equipment is improved, the service life is prolonged, the blood coagulation risk is effectively reduced by using an anticoagulation coating, the bleeding probability of a patient is reduced, and anticoagulation management is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of blood oxygenation devices, in particular to a blood oxygenation device dedicated to an extracorporeal cardiopulmonary auxiliary support system. Background Art

[0002] In some high-risk surgeries such as percutaneous coronary intervention (PCI), an extracorporeal cardiopulmonary support system is essential to maintain the patient's vital signs and organ function. Extracorporeal cardiopulmonary support systems replace damaged cardiopulmonary systems by providing artificial oxygenated blood and maintaining blood circulation. They are divided into heart assist devices and artificial ventilators, which can temporarily replace cardiopulmonary function, reduce surgical risks, prolong surgical time, and enable surgeons to perform surgery in a more stable condition, significantly improving the success rate of surgery.

[0003] The blood oxygenation system is the core component of the extracorporeal cardiopulmonary support system, which significantly affects the overall application efficiency and safety of the equipment. However, there are many problems with existing blood oxygenation devices: (1) The high cost limits the popularity of these blood oxygenation devices, especially in medical environments with limited resources. (2) The use of existing oxygenation devices has a high risk of coagulation, which not only increases the probability of bleeding in patients, but also requires medical staff to perform strict anticoagulation management, further increasing the complexity and risk of treatment. (3) The use time of existing blood oxygenation devices is limited. They can only provide cardiopulmonary function support in the short term, which limits their scope of application in treating longer-term cardiopulmonary diseases.

[0004] In response to the above technical problems, the utility model provides a blood oxygenation device dedicated to the extracorporeal cardiopulmonary support system, which uses the second-generation fiber hollow membrane and optimizes the production process to significantly reduce the cost of the equipment, making it more economical and affordable, thereby improving its popularity in resource-limited environments. Secondly, we use an anticoagulant coating to effectively reduce the risk of coagulation and reduce the patient's bleeding probability, while simplifying anticoagulation management, resulting in a new generation of blood oxygen devices that are both economical and safe for long-term use. Utility Model Content

[0005] The utility model provides a blood oxygenation device dedicated to an extracorporeal cardiopulmonary auxiliary support system, the blood oxygenation device is in the shape of a hollow cylinder, comprising an outer shell 20 and an inner shell 17, the diameter and height of the inner shell 17 are both smaller than the outer shell 20, multiple layers of hollow fiber membranes 16 in different directions are wound between the inner shell 17 and the outer shell 20, the hollow fiber membranes 16 at both ends of the inner shell 17 are blocked by a polyurethane blocking layer 15, but the fiber holes of the hollow fiber membranes 16 are not blocked; blood is filled between the layers of the hollow fiber membranes 16 and will not flow out of the polyurethane blocking layer 15, the polyurethane blocking layer A gas inflow channel 14 is provided in the gap between the polyurethane sealing layer 15 and the outer shell 20 at the upper end, and oxygen enters into the fiber pores of the hollow fiber membrane 16 from the gas inflow channel 14, and blood and oxygen exchange gases through the fiber membrane. A gas outflow channel 18 is provided in the gap between the polyurethane sealing layer 15 and the outer shell 20 at the lower end, and the exchanged carbon dioxide flows out from the gas outflow channel 18. The blood inflow channel 19 directly enters the hollow fiber membrane 16 from the lower end of the outer shell 20. The blood outflow channel 21 is provided at the upper end of the outer shell 20 and is connected to the hollow fiber membrane 16 for the outflow of blood after gas exchange.

[0006] Preferably, the outer surface of the hollow fiber membrane 16 is provided with an anticoagulant coating to prevent blood from coagulating during the gas exchange process.

[0007] Preferably, the angle between the fiber direction of the hollow fiber membrane 16 and the vertical direction of the inner shell 17 is 30-60°. The inventors have reached the above conclusion after many clinical trials. This winding angle can make all the blood flow smoothly, significantly reduce the blood stagnant area, and will not cause blood aggregation and coagulation to form thrombus, nor affect gas exchange, thereby extending the service life.

[0008] Preferably, the outer shell 20 has a diameter of 8-12 cm, and the volume between the outer shell 20 and the inner shell 17 can support gas exchange of blood within a specific time.

[0009] Preferably, the inner shell 17 has a diameter of 3-7 cm, which is convenient for winding the hollow fiber membrane 16 .

[0010] Preferably, the hollow fiber membrane 16 is provided with multiple layers.

[0011] Preferably, the gas inflow channel 14 and the gas outflow channel 18 are arranged in the same direction or in different directions.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a blood oxygenation device dedicated to an extracorporeal cardiopulmonary support system. The blood oxygenation device uses a multi-angle, multi-layer hollow fiber membrane winding method, which can make all blood flow smoothly, significantly reduce the blood stasis area, and will not cause blood aggregation and coagulation to form thrombus, and will not affect gas exchange, thereby improving the oxygenation efficiency of the equipment and extending the service life. The optimized production process significantly reduces the cost of the equipment, making it more economical and affordable, thereby improving its popularization in resource-limited environments. The use of an anticoagulant coating effectively reduces the risk of coagulation, reduces the patient's bleeding probability, and simplifies anticoagulation management. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Appearance of a blood oxygenation device dedicated to an extracorporeal cardiopulmonary support system

[0014] Figure 2 Internal diagram of a blood oxygenation device for an extracorporeal cardiopulmonary support system: 14. Gas inflow channel; 15. Polyurethane sealing layer; 16. Hollow fiber membrane; 17. Inner shell; 18. Gas outflow channel; 19. Blood inflow channel; 20. Outer shell; 21. Blood outflow channel.

[0015] Figure 3 Schematic diagram of hollow fiber membrane 16 DETAILED DESCRIPTION

[0016] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The utility model provides a blood oxygenation device dedicated to an extracorporeal cardiopulmonary auxiliary support system, the blood oxygenation device is in the shape of a hollow cylinder, comprising an outer shell 20 and an inner shell 17, the diameter and height of the inner shell 17 are both smaller than the outer shell 20, multiple layers of hollow fiber membranes 16 in different directions are wound between the inner shell 17 and the outer shell 20, the hollow fiber membranes 16 at both ends of the inner shell 17 are blocked by a polyurethane blocking layer 15, but the fiber holes of the hollow fiber membranes 16 are not blocked; blood is filled between the layers of the hollow fiber membranes 16 and will not flow out of the polyurethane blocking layer 15, the polyurethane blocking layer A gas inflow channel 14 is provided in the gap between the polyurethane sealing layer 15 and the outer shell 20 at the upper end, and oxygen enters into the fiber pores of the hollow fiber membrane 16 from the gas inflow channel 14, and blood and oxygen exchange gases through the fiber membrane. A gas outflow channel 18 is provided in the gap between the polyurethane sealing layer 15 and the outer shell 20 at the lower end, and the exchanged carbon dioxide flows out from the gas outflow channel 18. The blood inflow channel 19 directly enters the hollow fiber membrane 16 from the lower end of the outer shell 20. The blood outflow channel 21 is provided at the upper end of the outer shell 20 and is connected to the hollow fiber membrane 16 for the outflow of blood after gas exchange. The outer surface of the hollow fiber membrane 16 is provided with an anticoagulant coating to prevent blood from coagulating during gas exchange. The angle between the fiber direction of the hollow fiber membrane 16 and the perpendicular direction of the inner shell 17 is 30-60°. The inventor has reached the above conclusion after many clinical trials. This winding angle allows all blood to flow smoothly, significantly reduces the blood stasis area, and will not cause blood aggregation and coagulation to form thrombus, nor affect gas exchange, thereby extending the service life. The outer shell 20 has a diameter of 8-12 cm, and the volume between it and the inner shell 17 can support the gas exchange of blood within a specific time. The inner shell 17 has a diameter of 3-7 cm, which is convenient for winding the hollow fiber membrane 16. The hollow fiber membrane 16 is provided with multiple layers, and the gas inlet channel 14 and the gas outlet channel 18 are arranged in the same direction or in different directions.

[0020] Directions:

[0021] (1) Connect the blood perfusion tube to the blood inflow channel 19 and the blood outflow channel 21 respectively;

[0022] (2) connecting the oxygen pipe to the gas inflow channel 14, and connecting the gas outflow channel 18 to the carbon dioxide recovery pipe;

[0023] (3) Start the roller pump to simultaneously input oxygen and blood into the blood oxygenation device, complete the blood oxygen exchange in the blood oxygenation device, discharge the blood circulation into the human body, and discharge carbon dioxide for recycling;

[0024] (4) Complete blood oxygen exchange.

Claims

1. A blood oxygenation device for an extracorporeal cardiopulmonary support system, characterized in that: The blood oxygenation device is in the shape of a hollow cylinder, comprising an outer shell (20) and an inner shell (17), wherein the diameter and height of the inner shell (17) are both smaller than those of the outer shell (20), and multiple layers of hollow fiber membranes (16) in different directions are wound between the inner shell (17) and the outer shell (20), and the hollow fiber membranes (16) at both ends of the inner shell (17) are blocked by polyurethane blocking layers (15), and a gas outflow channel (18) is provided in the gap between the polyurethane blocking layer (15) and the outer shell (20) at the lower end, and a gas inflow channel (14) is provided in the gap between the polyurethane blocking layer (15) and the outer shell (20) at the upper end, and a blood inflow channel (19) directly passes through the hollow fiber membrane (16) from the lower end of the outer shell (20), and a blood outflow channel (21) is provided at the upper end of the outer shell (20) and connected to the hollow fiber membrane (16).

2. The blood oxygenation device according to claim 1, characterized in that The outer surface of the hollow fiber membrane (16) is provided with an anti-coagulation coating.

3. The blood oxygenation device according to claim 1, characterized in that The angle between the fiber direction of the hollow fiber membrane (16) and the vertical direction of the inner shell (17) is 30-60°.

4. The blood oxygenation device according to claim 1, characterized in that: The outer shell (20) has a diameter of 8-12 cm.

5. The blood oxygenation device according to claim 1, characterized in that: The inner shell (17) has a diameter of 3-7 cm.

6. The blood oxygenation device according to claim 1, characterized in that: The hollow fiber membrane (16) is provided in plurality.

7. The blood oxygenation device according to claim 1, characterized in that: The gas inflow channel (14) and the gas outflow channel (18) are arranged in the same direction or in different directions.

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