A priming bag for extracorporeal membrane oxygenation

Abstract

The utility model relates to medical equipment technical field especially, more particularly to a kind of pre-filled bag for extracorporeal membrane oxygenation, the pre-filled bag provided in the utility model embodiment includes bag body, outlet pipe and return pipe, bag body inside is provided with the inner chamber for storing pre-filled liquid;Outlet pipe, with inner chamber intercommunication, the pipe orifice of outlet pipe is set to the lowest end of inner chamber;Return pipe, with inner chamber intercommunication, the pipe orifice of return pipe is set to the high end of inner chamber;Wherein, pre-filled liquid in inner chamber is guided to blood circuit by outlet pipe, and pre-filled liquid in blood circuit is returned to inner chamber by return pipe, outlet pipe and return pipe are respectively pressure assembled in the both ends of bag body transversely, the pre-filled bag provided in the utility model embodiment can quickly discharge air bubble when pre-charging, simultaneously avoid air bubble backflow to form cavity.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a pre-filled bag for extracorporeal membrane oxygenation. Background Technology

[0002] ECMO, short for Extracorporeal Membrane Oxygenation, is a type of extracorporeal circulation surgery. The consumables used in this procedure to replace heart and lung function mainly consist of a pump head that replaces the heart's function, an oxygenator that replaces the lungs' function, related connecting tubing, and a pre-filled bag. Before use, the pump head and oxygenator are connected in series via tubing to form an open-loop blood circuit with connectors on both sides. Before surgery, the connectors on both sides of the open-loop blood circuit are connected to the outlet and return water pipes of the pre-filled bag, forming a closed loop. The circuit is then filled with fluid by gravity and the pump head's drive.

[0003] During the pre-filling process, the pre-filled bag needs to completely expel the gas from the circuit and prevent air bubbles from returning to the blood circuit through the outlet pipe. If air bubbles return to the blood circuit through the outlet pipe and form cavities, the risk of blood clots will be further increased when the consumable is used. Therefore, quickly expelling air bubbles and preventing them from returning to the circuit is a key factor affecting the performance of the pre-filled bag.

[0004] However, pre-filled bags on the market have two common problems: First, the problem of air bubble backflow has not been solved. During the pre-filling process, air bubbles flow back into the blood circuit and form cavities, which poses a certain risk to use. Second, the solution to this problem is through a relatively complex circuit and pre-filling method, which cannot meet the clinical need for rapid response. Utility Model Content

[0005] This invention provides a pre-filled bag for extracorporeal membrane oxygenation (ECMO), which can quickly expel air bubbles during pre-filling while preventing air bubbles from flowing back and forming cavities.

[0006] This utility model provides a pre-filled bag for extracorporeal membrane oxygenation (ECMO), comprising: a bag body with an inner cavity for storing pre-filled fluid; an outlet pipe communicating with the inner cavity, the outlet of the outlet pipe being located at the lowest end of the inner cavity; and a return pipe communicating with the inner cavity, the outlet of the return pipe being located at the high end of the inner cavity; wherein, the pre-filled fluid in the inner cavity is discharged to the blood circuit through the outlet pipe, and the pre-filled fluid in the blood circuit is returned to the inner cavity through the return pipe, and the outlet pipe and the return pipe are respectively press-fitted to both ends of the bag body laterally.

[0007] In one possible implementation, the horizontal distance between the outlet pipe and the return pipe is greater than two-thirds of the width of the bag.

[0008] In one possible implementation, it also includes: a high-level flow-blocking seal, which extends downward from the inner top wall of the inner cavity and is located between the outlet pipe and the return pipe.

[0009] In one possible implementation, the front and rear sides of the high-position flow-blocking seal are connected to the front and rear inner walls of the inner cavity, respectively.

[0010] In one possible implementation, the high-level flow-blocking seal is positioned horizontally adjacent to the return water pipe.

[0011] In one possible implementation, it also includes: bubble drainage sealing, which is set on the inner bottom wall of the inner cavity and between the outlet pipe and the return pipe.

[0012] In one possible implementation, a first inclined surface is provided on the side of the bubble drainage seal facing the return water pipe, and the height of the first inclined surface gradually increases in the direction away from the return water pipe.

[0013] In one possible implementation, a second inclined surface is provided on the side of the bubble drainage seal facing the water outlet pipe. The height of the second inclined surface gradually increases in the direction away from the water outlet pipe, and there is a smooth transition between the first and second inclined surfaces so that the bubble drainage seal forms an arc structure.

[0014] In one possible implementation, it further includes: a puncture tube, which is press-fitted onto the upper end of the bag body and communicates with the inner cavity, and the puncture tube is equipped with a puncture device; and an exhaust pipe, which is press-fitted onto the upper end of the bag body and communicates with the inner cavity.

[0015] In one possible implementation, the bag body is provided with hanging holes and scale markings.

[0016] This invention provides a pre-filled bag for extracorporeal membrane oxygenation (ECMO). An internal cavity is created within the bag, with the outlet pipe located at the lowest point and the return pipe at the highest, forming a height difference between the two pipes. During pre-filling, this height difference design places the return pipe in a low-pressure region and the outlet pipe in a high-pressure region, creating a pressure difference. This pressure difference allows the pre-filled fluid to flow rapidly from the outlet pipe into the blood circuit, while simultaneously expelling air from the blood circuit into the pre-filled bag. The outlet and return pipes are press-fitted to the two ends of the bag's lateral direction, allowing the pre-filled fluid a longer horizontal flow distance from the return pipe to the outlet pipe. This layout design provides sufficient time and space for gas-liquid separation during the flow, allowing air bubbles to rise before reaching the outlet pipe. It enables rapid pre-filling and rapid venting during the pre-filling process, meeting the needs of rapid clinical response; at the same time, it can effectively separate air bubbles in the pre-filling fluid, preventing air bubbles from flowing back into the blood circuit and forming cavities, thus ensuring the safety and reliability of the pre-filling process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a pre-filled bag for extracorporeal membrane oxygenation provided by this utility model.

[0019] Figure 2 This is a schematic diagram of the flow of pre-filling liquid during the pre-filling of a pre-filled bag provided by this utility model.

[0020] Figure 3 This is a schematic diagram of the separation of air bubbles during the pre-filling of a pre-filled bag provided by this utility model.

[0021] Figure label:

[0022] 1. Bag body; 11. Inner cavity; 12. High-position flow-blocking seal; 13. Bubble drainage seal; 131. First bevel; 132. Second bevel; 14. Hanging hole; 15. Scale markings;

[0023] 2. Water outlet pipe; 21. First connector;

[0024] 3. Return water pipe; 31. Second connector;

[0025] 4. Puncture tube; 5. Puncture instrument; 6. Exhaust tube; 7. Tube clamp. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] The following is combined Figure 1-3 This invention provides a pre-filled bag for extracorporeal membrane oxygenation (ECMO), comprising: a bag body 1, an outlet pipe 2, and a return pipe 3, wherein:

[0028] The bag body 1 has an inner cavity 11 for storing pre-filled liquid; specifically, the bag body 1 is a horizontal polygonal bag body 1 with an inner cavity 11.

[0029] The water outlet pipe 2 is connected to the inner cavity 11, and the opening of the water outlet pipe 2 is located at the lowest end of the inner cavity 11. The lowest end refers to the lowest position when the pre-filled bag is in normal use. At this time, the water outlet pipe 2 is set in the vertical direction to facilitate the pre-filled liquid in the inner cavity 11 to enter the water outlet pipe 2.

[0030] The return water pipe 3 is connected to the inner cavity 11, and the opening of the return water pipe 3 is located at the high end of the inner cavity 11.

[0031] The pre-filled fluid in the inner cavity 11 is discharged to the blood circuit through the water outlet pipe, and the pre-filled fluid in the blood circuit is returned to the inner cavity 11 through the water return pipe 3. The water outlet pipe 2 and the water return pipe 3 are respectively press-fitted to both ends of the bag body 1 laterally.

[0032] In this invention, an inner cavity 11 is provided inside the bag body 1, with the outlet pipe 2 located at the lowest end of the inner cavity 11 and the return pipe 3 located at the highest end, creating a height difference between the outlet pipe 2 and the return pipe 3. During pre-filling, this height difference design places the outlet of the return pipe 3 in a low-pressure region and the outlet pipe 2 in a high-pressure region, creating a pressure difference between them. This pressure difference allows the pre-filling liquid to flow quickly from the outlet pipe 2 to the blood circuit, while simultaneously expelling air from the circuit into the pre-filled bag. The outlet pipe 2 and the return pipe 3 are respectively press-fitted to the two ends of the bag body 1 laterally, allowing the pre-filling liquid to have a longer horizontal flow distance as it flows from the return pipe 3 to the outlet pipe 2. This layout design allows sufficient time and space for gas-liquid separation during the flow of the pre-filling liquid, enabling air bubbles to rise before reaching the outlet pipe 2. Through the combination of the above structural designs, the technical problems of pre-filling liquid retention and insufficient air bubble separation in the prior art are solved, effectively avoiding the risk of air bubbles flowing back into the blood circuit and forming cavities. It achieves rapid venting and effective bubble separation of the prefill fluid, meeting the needs of rapid clinical response, while ensuring the safety and reliability of the prefilling process.

[0033] Meanwhile, the polygonal design of the bag body 1 ensures that the pre-filled bag maintains its shape stability when suspended, guaranteeing unobstructed horizontal flow of the pre-filled liquid. The pipeline is secured using a press-fit method, forming a reliable sealed connection and preventing pre-filled liquid leakage.

[0034] Specifically, the inner cavity 11 within the bag body 1 provides storage space for the pre-filled fluid, which can be used for bubble separation. The outlet pipe 2 is located at the lowest end of the inner cavity 11, allowing the pre-filled fluid to flow out from the lowest point and reducing its retention at the bottom of the bag body 1. The outlet pipe 3 is located at the high end of the inner cavity 11, allowing the pre-filled fluid returning from the blood circuit to flow in from a higher position. Gravity and pressure difference create a downward flow velocity, while also providing space for bubbles to rise. The outlet pipe 2 and return pipe 3 are press-fitted to both ends of the bag body 1, forming a reliable sealed connection to prevent pre-filled fluid leakage and ensure a secure pipe connection. In clinical applications, when medical staff need to replace the oxygenator, the pre-filled fluid can be discharged to the blood circuit through the outlet pipe 2 for pre-filling. After pre-filling, the pre-filled fluid returns to the pre-filled bag through the return pipe 3, forming a closed-loop circulation system.

[0035] In some embodiments, the horizontal distance between the water outlet pipe 2 and the water return pipe 3 is greater than two-thirds of the width of the bag body 1.

[0036] In this invention, the horizontal distance between the outlet pipe 2 and the return pipe 3 is greater than two-thirds of the width of the bag body 1, providing ample flow space for the pre-filled fluid and allowing its velocity to gradually decrease during flow. When the pre-filled fluid returning from the return pipe 3 carries air bubbles, the longer horizontal flow distance allows the bubbles to float and separate before reaching the outlet pipe 2, preventing them from re-entering the blood circuit. The larger horizontal distance also provides installation space for the high-level flow-blocking seal 12 and the air bubble drainage seal 13, enabling these functional structures to function fully. In actual operation, medical personnel can observe the flow state of the pre-filled fluid to promptly understand the air bubble separation situation.

[0037] In some embodiments, it further includes: a high-level flow-blocking seal 12, which extends downward from the inner top wall of the inner cavity 11 and is located between the outlet pipe 2 and the return pipe 3.

[0038] In this invention, the high-level flow-blocking seal 12 is designed to extend downwards from the inner top wall of the inner cavity 11, causing the pre-filled liquid to collide with the high-level flow-blocking seal 12 and change its flow direction during flow. When the pre-filled liquid flows in from the return water pipe 3, it first contacts the high-level flow-blocking seal 12, changing the liquid flow direction and reducing the flow velocity. This collision and guiding effect promotes the separation of air bubbles from the liquid in the pre-filled liquid, preventing the pre-filled liquid from flowing directly laterally to the outlet pipe 2. The high-level flow-blocking seal 12 also creates a specific flow path for the pre-filled liquid, reducing turbulence and providing stable conditions for the upward separation of air bubbles.

[0039] In some embodiments, the front and rear sides of the high-position flow-blocking edge 12 are connected to the front and rear inner walls of the inner cavity 11, respectively.

[0040] In this invention, the design of connecting the front and rear sides of the high-level flow-blocking seal 12 to the front and rear inner walls of the inner cavity 11 respectively forms a complete partition structure. Through this connection method, the pre-filled liquid must flow along a predetermined path, ensuring full contact between the pre-filled liquid and the high-level flow-blocking seal 12. The complete partition structure prevents the pre-filled liquid from bypassing the high-level flow-blocking seal 12, avoiding the formation of a channel for rapid liquid flow. This connection structure also enhances the overall strength of the pre-filled bag, enabling it to maintain a stable shape under pressure changes.

[0041] In some embodiments, the high-level flow-blocking seal 12 is arranged laterally adjacent to the return water pipe 3.

[0042] In this invention, the high-level flow-blocking seal 12 is designed to be horizontally adjacent to the return water pipe 3, ensuring that the pre-filled liquid immediately contacts the high-level flow-blocking seal 12 after flowing out of the return water pipe 3. This arrangement can immediately control the flow direction of the pre-filled liquid returning from the return water pipe 3, preventing secondary generation of bubbles caused by high-speed jetting of the pre-filled liquid. Through the collision with the high-level flow-blocking seal 12, the flow rate of the pre-filled liquid is effectively controlled, while ensuring timely change in the flow direction of the pre-filled liquid. This design allows the high-level flow-blocking seal 12 to maximize its guiding and decelerating effects.

[0043] Specifically, the bottom of the high-level flow-blocking seal 12 is on the same horizontal plane as the opening of the return water pipe 3, or the height difference between the bottom of the high-level flow-blocking seal 12 and the opening of the return water pipe 3 is within 3cm, so as to ensure that the pre-filled liquid output from the opening of the return water pipe 3 can be fully intercepted by the high-level flow-blocking seal 12, preventing the pre-filled liquid output from the return water pipe 3 from flowing directly to the outlet water pipe 2.

[0044] In some embodiments, it further includes: a bubble drainage seal 13, which is disposed on the inner bottom wall of the inner cavity 11 and is disposed between the water outlet pipe 2 and the water return pipe 3.

[0045] In this invention, the bubble-guiding seal 13 is disposed on the inner bottom wall of the inner cavity 11, located between the outlet pipe 2 and the return pipe 3, to provide secondary guidance and deceleration for the pre-filled liquid. When the pre-filled liquid flows through the bubble-guiding seal 13, a change in flow velocity occurs, which helps to separate residual bubbles. The bubble-guiding seal 13 prevents the pre-filled liquid from forming eddies at the bottom, avoiding bubbles being drawn into the bottom liquid. At the same time, this structure can also guide bubbles that have settled to the bottom to float back to the surface, improving the completeness of bubble removal.

[0046] Specifically, one bubble drainage seal 13 can be set, or multiple bubble drainage seals can be set at intervals along the inner bottom wall of the inner cavity 11. By setting multiple bubble drainage seals 13 at intervals, the drainage effect of bubbles can be further improved, thus improving the separation effect of bubbles in the prefill liquid.

[0047] In some embodiments, the bubble drainage sealing edge 13 is provided with a first inclined surface 131 on the side facing the return water pipe 3, and the height of the first inclined surface 131 gradually increases in the direction away from the return water pipe 3.

[0048] In this invention, the first inclined surface 131 of the bubble guide sealing edge 13 facing the return water pipe 3 gradually increases in height away from the return water pipe 3, forming an upward guiding surface. When the pre-filled liquid flows through the first inclined surface 131, the liquid flow generates an upward component force due to the inclination of the inclined surface, making the bubbles more likely to float. The gradual design of the inclined surface avoids abrupt changes in the liquid flow, reduces the generation of turbulence, and prevents bubbles from being drawn into the deeper liquid by turbulence. Through the guiding effect of the first inclined surface 131, even tiny bubbles in the pre-filled liquid can be effectively separated. Even when the pre-filled liquid flow rate is high, this structure can still maintain a stable bubble separation effect.

[0049] In some embodiments, the bubble drainage sealing edge 13 is provided with a second inclined surface 132 on the side facing the water outlet pipe 2. The height of the second inclined surface 132 gradually increases in the direction away from the water outlet pipe 2. The first inclined surface 131 and the second inclined surface 132 are smoothly transitioned so that the bubble drainage sealing edge 13 forms an arc structure.

[0050] In this invention, the second inclined surface 132, located on the side of the bubble-guiding seal 13 facing the outlet pipe 2, gradually increases in height away from the outlet pipe 2. The design of the second inclined surface 132 achieves a smooth deceleration of the pre-filled liquid. As the pre-filled liquid flows upward along the second inclined surface 132, some kinetic energy is converted into potential energy, causing the liquid velocity to gradually decrease. The smooth transition between the first inclined surface 131 and the second inclined surface 132 forms an arc structure, allowing the liquid to flow smoothly along the arc surface and avoiding turbulence at the corners. This design ensures smooth flow of the pre-filled liquid while preventing the generation of new bubbles due to sudden velocity changes. The arc structure also prevents liquid accumulation at the corners.

[0051] In some embodiments, the device further includes: a puncture tube 4, which is press-fitted onto the upper end of the bag body 1 and communicates with the inner cavity 11, and a puncture device 5 is provided on the puncture tube 4; and an exhaust pipe 6, which is press-fitted onto the upper end of the bag body 1 and communicates with the inner cavity 11. The exhaust pipe 6 is a pipeline, with one end connected to the upper end of the bag body 1 and the other end connected to air, for discharging excess gas from the pre-filled bag.

[0052] In this invention, the design of the puncture tube 4 being press-fitted onto the upper end of the bag body 1 and equipped with the puncture device 5 provides a dedicated channel for adding pre-filling fluid to the pre-filled bag. The puncture tube 4 allows medical personnel to quickly and accurately add the pre-filling fluid. The design of the vent pipe 6 being press-fitted onto the upper end of the bag body 1 provides a dedicated channel for the discharge of separated gas. Through the vent pipe 6, the separated gas can be discharged from the pre-filled bag in a timely manner, preventing gas accumulation inside the pre-filled bag. The puncture tube 4 and the vent pipe 6 adopt the same press-fitting method as the main structure, ensuring the sealing and reliability of the connection.

[0053] like Figure 2 As shown, in use, the pre-filled bag provided in this embodiment of the present invention gradually increases the pre-filling fluid from the lower end to the upper end of the inner cavity 11 of the bag body 1. The outlet of the water pipe 2 is located in the high-pressure position region a at the lower end of the inner cavity 11, and the outlet of the water return pipe 3 is located in the low-pressure position region b at the upper end of the inner cavity 11. During pre-filling, firstly, the clamps on the water outlet pipe 2 and the water return pipe 3 are clamped, the pre-filling fluid is injected into the pre-filled bag, and then the water outlet pipe 2 and the water return pipe 3 are connected to the blood circuit respectively, and the clamps are opened to start pre-filling.

[0054] When the liquid level in the pre-filled bag is higher than the inlet of the return pipe 3, the water pressure is lower at the higher end of the liquid, while the water pressure is higher at the lowest end of the liquid. This difference in liquid level creates a pressure difference, causing the pre-filled liquid to quickly enter the blood circuit from the inlet of the outlet pipe 2, while air is expelled from the pre-filled bag through the inlet of the return pipe 3. When the liquid level in the pre-filled bag is lower than the inlet of the return pipe 3, a significant pressure difference still exists between the two inlets, as the inlet of the return pipe 3 is in the air while the inlet of the outlet pipe 2 is in the liquid. The pre-filled liquid continues to quickly enter the blood circuit from the inlet of the outlet pipe 2, while air is expelled from the pre-filled bag through the inlet of the return pipe 3.

[0055] like Figure 3 As shown, during the pre-filling process, when the liquid level in the pre-filled bag is lower than the opening of the return pipe 3, in addition to venting gas, a portion of the pre-filled liquid will also be discharged from the opening of the return pipe 3. When this pre-filled liquid falls from the opening of the return pipe 3 onto the liquid surface of the pre-filled bag, it will collide, forming splashes and bubbles. The high-level flow-blocking seal 12 causes the pre-filled liquid discharged from the return pipe 3 to fall earlier, concentrating the generated bubbles in area c, away from the outlet pipe 2. Because the horizontal distance between the outlet pipe 2 and the return pipe 3 is large, and the bubble density is much smaller than the pre-filled liquid density, the generated bubbles will automatically rise as the pre-filled liquid flows from the return pipe 3 to the outlet pipe 2. The bubble-guiding seal 13 further guides and enhances the upward trend of the bubbles, ensuring that the pre-filled liquid flowing into the outlet pipe 2 is bubble-free.

[0056] The pre-filled bag for extracorporeal membrane oxygenation provided in this embodiment of the invention has a first connector 21 at the end of the outlet pipe 2 furthest from the opening. The first connector is a quick connector for connecting to the blood circuit. A second connector 31 at the end of the return pipe 3 furthest from the opening is also a quick connector for connecting to the blood circuit. The first connector 21 and the second connector 31 differ structurally to avoid reverse connection issues. Clamps 7 are respectively provided on the outlet pipe 2 and the return pipe 3 to control the opening and closing of the two pipes. The puncture device 5 can be connected to an external container containing pre-filled fluid to introduce the pre-filled fluid from the external container into the bag body 1. Clamps 7 are also provided on the puncture tube 4 to control the opening and closing of the puncture tube 4.

[0057] The bag body 1 is provided with a hanging hole 14 and a scale mark 15. The hanging hole 14 is a combination of circular and rectangular holes, which is used to accommodate as many sizes of infusion stand hooks as possible when the pre-filled bag is hung on the infusion stand. The scale mark 15 can intuitively display the volume of liquid in the bag.

[0058] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications 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.

Claims

1. A pre-filled bag for extracorporeal membrane oxygenation (ECMO), characterized in that, include: The bag body (1) has an inner cavity (11) for storing pre-filled liquid. The water outlet pipe (2) is connected to the inner cavity (11), and the opening of the water outlet pipe (2) is located at the lowest end of the inner cavity (11); The return water pipe (3) is connected to the inner cavity (11), and the opening of the return water pipe (3) is located at the high end of the inner cavity (11); The pre-filled fluid in the inner cavity (11) is discharged to the blood circuit through the water outlet pipe (2), and the pre-filled fluid in the blood circuit is returned to the inner cavity (11) through the water return pipe (3). The water outlet pipe (2) and the water return pipe (3) are respectively pressed into the two ends of the bag body (1) laterally.

2. The pre-filled bag for extracorporeal membrane oxygenation according to claim 1, characterized in that, Furthermore, the horizontal distance between the outlet pipe (2) and the return pipe (3) is greater than two-thirds of the width of the bag body (1).

3. The pre-filled bag for extracorporeal membrane oxygenation according to claim 1, characterized in that, Also includes: The high-level flow-blocking seal (12) is drawn out from the inner top wall of the inner cavity (11) and extends downward. The high-level flow-blocking seal (12) is located between the water outlet pipe (2) and the water return pipe (3).

4. The pre-filled bag for extracorporeal membrane oxygenation according to claim 3, characterized in that, The front and rear sides of the high-position flow-blocking seal (12) are connected to the front and rear inner walls of the inner cavity (11), respectively.

5. The pre-filled bag for extracorporeal membrane oxygenation according to claim 3, characterized in that: The high-level flow-blocking seal (12) is set horizontally adjacent to the return water pipe (3).

6. The pre-filled bag for extracorporeal membrane oxygenation according to claim 1, characterized in that, Also includes: Bubble drainage seal (13) is provided on the inner bottom wall of the inner cavity (11) and is provided between the water outlet pipe (2) and the water return pipe (3).

7. The pre-filled bag for extracorporeal membrane oxygenation according to claim 6, characterized in that: The bubble drainage seal (13) has a first inclined surface (131) on the side facing the return water pipe (3), and the height of the first inclined surface (131) gradually increases in the direction away from the return water pipe (3).

8. The pre-filled bag for extracorporeal membrane oxygenation according to claim 7, characterized in that: The bubble drainage seal (13) is provided with a second inclined surface (132) on the side facing the water outlet pipe (2). The height of the second inclined surface (132) gradually increases in the direction away from the water outlet pipe (2). The first inclined surface (131) and the second inclined surface (132) are smoothly transitioned so that the bubble drainage seal (13) forms an arc structure.

9. The pre-filled bag for extracorporeal membrane oxygenation according to any one of claims 1-8, characterized in that, Also includes: A puncture tube (4) is pressed into the upper end of the bag body (1) and communicates with the inner cavity (11). A puncture device (5) is provided on the puncture tube (4). An exhaust pipe (6) is press-fitted onto the upper end of the bag body (1) and communicates with the inner cavity (11).

10. The pre-filled bag for extracorporeal membrane oxygenation according to any one of claims 1-8, characterized in that, The bag body (1) is provided with a hanging hole (14) and a scale mark (15).

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