An extracorporeal circulation apparatus and an extracorporeal membrane oxygenator

Abstract

The present disclosure relates to an extracorporeal circulation device and an extracorporeal membrane oxygenator, the extracorporeal circulation device comprising: a pressure detection device, a power pump, a flow detection device and a main machine; the pressure detection device, the flow detection device and the power pump are electrically connected with the main machine; the pressure detection device is arranged at an input end connecting pipe of the power pump; the flow detection device is arranged on a connecting pipe of the extracorporeal circulation device; the pressure detection device is used for monitoring the input end pressure of the power pump in real time and sending the input end pressure to the main machine; the flow detection device is used for monitoring the blood flow in the connecting pipe of the extracorporeal circulation device in real time and sending the blood flow to the main machine. The present disclosure can automatically adjust the rotating speed of the extracorporeal circulation device when the wall sticking occurs, solve the wall sticking, improve the overall reaction speed, avoid the operation time delay caused by the insufficient monitoring or the insufficient experience in the human judgment, and cause serious consequences.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and more particularly to an extracorporeal circulation device and an extracorporeal membrane oxygenator. Background Technology

[0002] Extracorporeal membrane oxygenation (ECMO) is a temporary support device for patients with circulatory and / or respiratory failure. During ECMO use, if the patient's blood volume is insufficient, the drainage cannula is poorly positioned, and the ECMO rotation speed is high, the side hole of the ECMO drainage cannula can easily become stuck to the atrial wall or vena cava, creating significant negative pressure and obstructing blood drainage—a condition known as wall adhesion. In this case, the ECMO flow rate will significantly decrease, or even drop to zero, resulting in insufficient tissue perfusion and the destruction of the patient's blood cells.

[0003] When ECMO adhesion occurs, doctors typically need to quickly reduce the ECMO speed to lower the negative pressure and alleviate the adhesion. Once the adhesion subsides, the ECMO speed can be adjusted back to its original level. This often requires doctors to quickly assess the pressure before the pump and manually adjust the ECMO speed. However, insufficient monitoring or inexperienced doctors may delay this process, potentially leading to serious consequences. Summary of the Invention

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides an extracorporeal circulation device and an extracorporeal membrane oxygenator that can automatically adjust the rotation speed of the extracorporeal circulation device when wall adhesion occurs, thereby resolving the wall adhesion situation, improving the overall response speed, and avoiding operation time delays caused by insufficient monitoring or lack of experience in human judgment, which could lead to serious consequences.

[0005] In a first aspect, this disclosure provides an extracorporeal circulation device, including: a pressure detection device, a power pump, a flow detection device, and a main unit;

[0006] The pressure detection device, the flow detection device, and the power pump are all electrically connected to the main unit; the pressure detection device is located at the input end connection pipe of the power pump; the flow detection device is located on the connection pipe of the extracorporeal circulation device.

[0007] The pressure detection device is used to monitor the input pressure of the power pump in real time and send the input pressure to the host; the flow detection device is used to monitor the blood flow in the connecting tube of the extracorporeal circulation device in real time and send the blood flow to the host; the host is used to determine that a wall adhesion situation has occurred when the input pressure and the blood flow meet preset conditions, and automatically reduce the initial speed of the power pump.

[0008] In some embodiments, the flow detection device includes an ultrasonic flow meter.

[0009] In some embodiments, the power pump includes a centrifugal pump or a rolling pump.

[0010] In some embodiments, the device further includes: an oxygenator; the output end of the power pump is connected to the input end of the oxygenator via a connecting pipe; and the flow detection device is disposed on the connecting pipe between the power pump and the oxygenator.

[0011] In some embodiments, the host computer is further configured to gradually increase the speed of the power pump to the initial speed after reducing the initial speed of the power pump to a preset speed.

[0012] In some embodiments, the host is further configured to determine that the extracorporeal circulation device is in a state of drainage obstruction when the number of times the input pressure and the blood flow meet the preset conditions is greater than a preset number.

[0013] In some embodiments, the host further includes an early warning module; the early warning module is used to issue an early warning prompt when it is determined that the wall-hugging situation has occurred.

[0014] In some embodiments, the host further includes a display module; the display module is used to display the status information of the extracorporeal circulation device.

[0015] In some embodiments, the host further includes an automatic wall-adhesion determination and deactivation module; the automatic wall-adhesion determination and deactivation module is used to receive a user trigger and disable the operation of automatically reducing the initial speed of the power pump when the speed of the power pump needs to be manually adjusted.

[0016] In a second aspect, this disclosure provides an extracorporeal membrane oxygenation (ECMO) device, including the extracorporeal circulation device as described in any embodiment of the first aspect.

[0017] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0018] The extracorporeal circulation device disclosed herein includes: a pressure detection device, a power pump, a flow detection device, and a main unit. The pressure detection device, flow detection device, and power pump are all electrically connected to the main unit. The pressure detection device is located at the input end connection pipe of the power pump, and the flow detection device is located on the connection pipe of the extracorporeal circulation device. The pressure detection device is used to monitor the input pressure of the power pump in real time and send the input pressure to the main unit. The flow detection device is used to monitor the blood flow in the connection pipe of the extracorporeal circulation device in real time and send the blood flow to the main unit. The main unit is used to determine that wall adhesion has occurred when the input pressure and blood flow meet preset conditions, and automatically reduces the initial speed of the power pump. When using the extracorporeal circulation device, the pressure detection device monitors the pressure between the inserted cannula and the power pump in real time, and the flow detection device monitors the blood flow in the extracorporeal circulation device in real time. When the pressure and blood flow meet preset conditions, it is determined that the cannula is wall-adhering, and the main unit will reduce the initial speed of the power pump to separate the cannula from the inner wall of the cavity, allowing blood to flow out normally. This invention can automatically adjust the rotation speed of the extracorporeal circulation device when adhesion to the wall occurs, thereby resolving the adhesion issue, improving the overall response speed, and avoiding operation time delays caused by insufficient monitoring or lack of experience in human judgment, which could lead to serious consequences. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an extracorporeal circulation device provided in an embodiment of the present disclosure;

[0022] Figure 2 This is a schematic diagram of another extracorporeal circulation device provided in an embodiment of the present disclosure. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0025] When using a cardiopulmonary bypass (CPB) device, blood is drained from the patient's body into the device, processed, and then returned to the patient. However, when the patient's blood volume is insufficient, the drainage cannula is poorly positioned, or the CPB device is operating at a high speed, the drainage cannula's side hole can easily adhere to the atrial or vena cava walls, creating significant negative pressure that obstructs blood flow. This adhesion significantly reduces or eliminates blood flow within the CPB device, leading to insufficient tissue perfusion, blood cell destruction, and endangering the patient's life. Usually, the doctor needs to quickly reduce the speed to lower the negative pressure and alleviate the adhesion. This requires the doctor to quickly assess the situation and manually adjust the speed; however, insufficient monitoring or an inexperienced doctor may delay the procedure, potentially causing serious consequences.

[0026] In view of the shortcomings of the prior art described above, embodiments of this disclosure provide an extracorporeal circulation device, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an extracorporeal circulation device provided in an embodiment of the present disclosure. The extracorporeal circulation device 10 includes: a pressure detection device 11, a power pump 12, a flow detection device 13, and a main unit 14.

[0027] The pressure detection device 11, the flow detection device 13, and the power pump 12 are all electrically connected to the main unit 14. The pressure detection device 11 is located at the input end connection pipe of the power pump 12, and the flow detection device 13 is located on the connection pipe of the extracorporeal circulation device 10.

[0028] The pressure detection device 11 is used to monitor the input pressure of the power pump 12 in real time and send the input pressure to the host 14. The flow detection device 13 is used to monitor the blood flow in the connecting tube of the extracorporeal circulation device 10 in real time and send the blood flow to the host 14. The host 14 is used to determine that the wall adhesion has occurred when the input pressure and blood flow meet the preset conditions, and automatically reduce the initial speed of the power pump 12.

[0029] When using the extracorporeal circulation device 10, a cannula is inserted into the body to drain blood. The cannula is connected to the power pump 12 via a connecting tube. The power pump 12 provides power to the extracorporeal circulation device 10, causing blood to flow in the connecting tube. A pressure detection device is located at the input end of the power pump 12 connecting tube, i.e., between the cannula and the power pump 12, to monitor the pressure before the pump in real time. After drawing blood from the body, the extracorporeal circulation device 10 processes the blood and returns the processed blood to the body. Therefore, the extracorporeal circulation device 10 includes multiple connecting tubes, and a flow detection device 13 is located at the connecting tube to detect blood flow. Both the pressure detection device 11 and the flow detection device 13 are electrically connected to the main unit 14. The pressure detection device 11 sends the monitored pressure to the main unit 14, and the flow detection device 13 sends the detected blood flow to the main unit 14. The power pump 13 provides power to the extracorporeal circulation device 10 to draw out blood, while the rotation speed of the power pump 12 affects the drainage speed. The power pump 12 is electrically connected to the main unit 14, and the main unit 14 can control the rotation speed of the power pump 12.

[0030] When blood is drawn from the body, the power pump 12 provides power, generating pressure within the connecting tube of the extracorporeal circulation device 10, thereby driving blood flow. Under normal blood flow conditions, the faster the speed of the power pump 12, the greater the blood flow in the connecting tube of the extracorporeal circulation device 10. However, if wall adhesion occurs, the cannula adheres tightly to the internal cavity wall, resulting in a high negative pressure. This excessive adhesion between the cannula and the internal cavity wall leads to less or no blood flow, reducing the blood flow in the connecting tube. The pressure detection device 11 monitors the pressure between the cannula and the power pump 12 to quickly determine the current pressure at the connecting tube. The flow detection device 13 acquires the blood flow rate. By comparing the acquired blood flow rate and pressure with preset conditions, wall adhesion is identified when the preset conditions are met. The main unit 14 promptly adjusts the speed of the power pump 12, reducing it to separate the cannula from the internal cavity wall, lowering the negative pressure within the connecting tube, and increasing the blood flow.

[0031] For example, preset conditions include a blood flow rate below 0.5 L / min and an absolute pressure value exceeding 150 mmHg. When these preset conditions are met, it is determined that wall adhesion has occurred. When the pressure detection device 11 detects a pressure exceeding 150 mmHg and the flow detection device 13 detects a blood flow rate above 0.5 L / min, the host 14 determines that the preset conditions have not been met, the blood is in a normal flow state, and wall adhesion has not occurred, so there is no need to adjust the speed of the power pump 12. If the pressure detection device 11 detects a pressure exceeding 150 mmHg and the flow detection device 13 detects a blood flow rate below 0.5 L / min, the pressure is too high, the speed of the power pump 12 will increase, but the blood flow rate will not increase with the increase in speed, but will instead be lower than the blood flow rate in the preset conditions, which can be determined as wall adhesion, affecting blood transmission. Therefore, the host 14 controls the power pump 12 to reduce the initial speed, loosening the cannula port and releasing the cannula from wall adhesion.

[0032] In this embodiment, when using the extracorporeal circulation device, the pressure detection device monitors the pressure between the inserted cannula and the power pump in real time, and the flow detection device monitors the blood flow in the extracorporeal circulation device in real time. When the pressure and blood flow meet preset conditions, it is determined that the cannula is adhering to the wall. The main unit will reduce the initial speed of the power pump to separate the cannula from the inner wall of the cavity, allowing blood to flow out normally. This disclosure can automatically adjust the speed of the extracorporeal circulation device when adhering to the wall occurs, resolve the adhering situation, improve the overall response speed, and avoid operation time delays caused by insufficient monitoring or lack of experience in human judgment, which could lead to serious consequences.

[0033] It should be noted that the pressure detection device and the flow detection device can use sensors or other structures capable of acquiring data. This disclosure does not limit the type of sensor, as long as it can monitor pressure and blood flow.

[0034] In some embodiments, the flow detection device includes an ultrasonic flow meter.

[0035] Using an ultrasonic flow meter to obtain blood flow rate requires no pipe interruption or contact with blood; the measuring device is simply clamped to the outside of the connecting pipe where blood is flowing. Measuring blood flow rate with an ultrasonic flow meter does not obstruct normal blood flow, has no additional pressure loss, and is suitable for connecting pipes of various sizes, meeting the needs of diverse equipment. The ultrasonic flow meter measures the blood velocity to obtain the flow rate.

[0036] It should be noted that when using an ultrasonic flow meter to detect flow, different types of calculation methods can be used, such as the Doppler method, velocity difference method, beam offset method, noise method, and correlation method. The embodiments disclosed herein are merely illustrative and do not impose any limitations.

[0037] In some embodiments, the power pump includes a centrifugal pump or a rolling pump.

[0038] The power pump is the power source of the extracorporeal circulation device, essentially functioning as the heart; hence, it's also called an artificial heart. As the power system driving blood flow, it includes centrifugal pumps or roller pumps. Centrifugal pumps rely on the high-speed rotation of the pump head, transferring kinetic energy to the fluid through the rotating impeller or viscous shear force. This creates a high-pressure zone on the inner wall of the pump and a low-pressure zone in the center. The center of the centrifugal pump is the inlet, and the periphery is the outlet. Under the influence of the pressure difference, the fluid moves unidirectionally from the center to the periphery. Power pumps can continuously draw venous blood from patients and use centrifugal force to pump the blood into the extracorporeal circulation device. As a fluid power source, centrifugal pumps cause relatively little damage to formed elements of blood, such as red blood cells and platelets.

[0039] Optionally, a roller pump can also be used. The roller pump consists of a central column connected to a clockwise rotating horizontal shaft. The shaft has a semi-circular groove outside, into which an elastic tube is inserted. When the horizontal shaft rotates clockwise, it squeezes the pump tube, causing the blood inside to flow unidirectionally forward. Increasing or decreasing the rotation speed of the horizontal shaft can increase or decrease the flow rate. It has a blocking effect, ensuring unidirectional blood flow, and can be reversed as needed to achieve backflow. It should be noted that this disclosure does not limit the type of power pump used; any pump that meets the actual requirements is acceptable.

[0040] In some embodiments, the extracorporeal circulation device 10 further includes an oxygenator 15, the output end of the power pump 12 is connected to the input end of the oxygenator 15 via a connecting pipe, and a flow detection device 13 is disposed on the connecting pipe between the power pump 12 and the oxygenator 15.

[0041] The input end of the oxygenator 15 is connected to the output end of the power pump 12 via a connecting pipe, receiving the blood pumped by the power pump 12. The output end of the oxygenator 15 returns the oxygenated blood back into the human body. In the extracorporeal circulation device 10, the oxygenator 15 functions as an artificial lung, exchanging oxygen and carbon dioxide. The oxygenator 15 can be a membrane oxygenator, such as a hollow fiber oxygenator. In a hollow fiber oxygenator, gas flows inside the fiber tube, while blood flows outside. The gas and blood exchange oxygen and carbon dioxide through diffusion across the membrane. A flow detection device 13 can be installed on the connecting pipe between the power pump 12 and the oxygenator 15 to detect the blood flow between the artificial lung and the artificial heart, which is more in line with human anatomy.

[0042] It should be noted that the connecting tube selected in this embodiment can be a silicone tube or other types of connecting tubes, and there is no limitation on the size of the connecting tube.

[0043] In some embodiments, the host is further configured to gradually increase the speed of the power pump back to the initial speed after reducing the initial speed of the power pump to a preset speed.

[0044] When both the pressure detected by the pressure sensor and the blood flow rate detected by the flow sensor meet preset conditions, wall adhesion is confirmed. The main unit will control the reduction of the initial speed of the power pump to decrease the pressure between the cannula and the body wall, allowing blood to flow between them and thus resolving the wall adhesion. To ensure the normal operation of the extracorporeal circulation device, after reducing the initial speed of the power pump to the preset speed, the speed is gradually increased back to the initial speed. For example, if the preset speed is 1000 rpm, the reduction stops at 1000 rpm, and the speed is gradually increased back to the initial speed. Once the speed reaches the preset speed, the condition for separation between the cannula and the body wall is fully met, confirming the complete release of wall adhesion. To ensure the normal operation of the extracorporeal circulation device and not affect the patient's treatment, the main unit will then control the power pump speed to gradually increase back to the initially set speed to continue assisting the patient's breathing.

[0045] The embodiments disclosed herein can automatically adjust the rotation speed of the extracorporeal circulation device when adhesion to the wall occurs, thereby resolving the adhesion issue and quickly restoring the treatment to the initial settings, avoiding interference with the patient's treatment and improving the overall response speed.

[0046] In some embodiments, the host is further configured to determine that the extracorporeal circulation device is in a state of drainage obstruction when the number of times the input pressure and blood flow meet the preset conditions is greater than a preset number.

[0047] The pressure and flow detection devices monitor pressure and blood flow in real time. The main unit also continuously checks whether the pressure and blood flow meet preset conditions. If the preset conditions are met, it is determined that adhesion to the wall has occurred. The main unit then controls the speed of the power pump, adjusting it and repeating the above operation. If the number of times the input pressure and blood flow meet the preset conditions exceeds a preset number (meaning that after multiple adjustments, the input pressure and blood flow values ​​remain abnormal), it can be determined that the abnormal data of the current extracorporeal circulation equipment is not caused by adhesion to the wall, but by other issues, indicating a drainage obstruction. Operations intended to address adhesion should not be continued to avoid misoperation, delays, and potentially more serious problems that could endanger the patient's life. For example, if the preset number of times is 3, and the preset conditions are met three times consecutively, it can be determined that it is not adhesion to the wall. After detecting that the pressure and blood flow meet the preset conditions, the speed of the power pump is adjusted for the first time. After a second test, if the pressure and blood flow still meet the preset conditions, a second adjustment will be made. If the third test finds that the pressure and blood flow still meet the preset conditions, it is determined that the data abnormality is not caused by the wall adhesion, and it is determined to be a drainage abnormality problem, which can be determined manually.

[0048] The embodiments disclosed herein can automatically adjust the rotation speed of the extracorporeal circulation device when adhesion to the wall occurs, thereby resolving the adhesion issue. It can also avoid misjudgment, promptly distinguish the cause of abnormal status of the extracorporeal circulation device, avoid affecting the patient's treatment, improve the overall response speed, and assist the user in making correct adjustments.

[0049] It should be noted that the specific number of preset times is not limited in this embodiment. Setting it to a continuous number of times is to ensure that there is no error. Alternatively, the preset number of times can be the number of times the power pump is adjusted. The actual number of times the power pump speed is adjusted is counted, and when the actual number of adjustments exceeds the preset number of adjustments, it is determined to be a drainage obstruction. Alternatively, other data can be used as the basis for judgment. This embodiment does not limit this either, all in order to avoid delaying operation time and ensure patient safety.

[0050] In some embodiments, the host also includes an early warning module, which is used to issue an early warning when it is determined that a wall-attaching situation has occurred.

[0051] The main unit also includes an early warning module. This module issues a warning when adhesion to the wall is detected, alerting the caregiver or doctor. For example, when pressure and blood flow meet preset requirements, the early warning module emits alarm sound A to indicate adhesion. After automatic adjustment by the extracorporeal circulation device, if the blood flow exceeds the preset minimum flow, and pressure and blood flow no longer meet the preset requirements, the adhesion is resolved, and alarm sound A changes to alarm sound B, indicating that adjustment is complete and the device is functioning normally. If, after adjustment, pressure and blood flow still meet the preset requirements and adhesion is not resolved, alarm sound A remains. If, after multiple consecutive adjustments, pressure and blood flow do not improve, alarm sound C is emitted, indicating that the current situation is not adhesion but a more serious problem requiring immediate attention to avoid delays in operation.

[0052] Optionally, the early warning module includes an audible alarm device, such as a buzzer, or a voice alarm device with different audible alerts. It can also be connected to a smart terminal to quickly remind caregivers or doctors via wireless communication.

[0053] In some embodiments, the host further includes a display module for displaying status information of the extracorporeal circulation device.

[0054] The main unit also includes a display module, which can display the pressure detected by the pressure detection device and the blood flow detected by the flow detection device, as well as the rotational speed of the power pump, providing a clear understanding of the operating parameters of the extracorporeal circulation equipment. It can also display abnormal conditions of the extracorporeal circulation equipment, providing prompts such as "Normal Operation," "Wall Adhesion," or "Drainage Obstruction." The display module shows the above status information of the extracorporeal circulation equipment on the main unit, making it convenient for caregivers or doctors to determine the current patient status and the status of the extracorporeal circulation equipment.

[0055] Optionally, the display module may include a display screen, such as an LCD screen, to display text and data information more clearly, or it may include LEDs, with different colors of LEDs corresponding to different states, and the status information of the extracorporeal circulation device is determined by the on / off state of the LEDs.

[0056] It should be noted that the embodiments disclosed herein do not impose any restrictions on the specific structure of the display module, and other display devices may be used. The embodiments disclosed herein are merely illustrative examples.

[0057] In some embodiments, the host also includes an automatic wall-adhesion determination and deactivation module, which is used to receive a user trigger and disable the operation of automatically reducing the initial speed of the power pump when the speed of the power pump needs to be manually adjusted.

[0058] The main unit also includes an automatic wall-adhesion detection and deactivation module. When the user triggers this module, the extracorporeal circulation device will disable the automatic reduction of the power pump's initial speed when manual adjustment of the pump's speed is required. This module can be triggered via buttons, touchscreen switches, smart terminals, and other methods. For example, if the extracorporeal circulation device is automatically reducing the power pump's initial speed, manually adjusting the pump's speed requires triggering the automatic wall-adhesion detection and deactivation module to disable this automatic reduction, allowing for manual adjustment.

[0059] This disclosure also provides an extracorporeal membrane oxygenator (ECMO), including the extracorporeal circulation device described in any of the above embodiments. The ECMO also includes other structures for achieving blood oxygenation, enabling extracorporeal respiration and circulation for patients during cardiopulmonary surgery. It is commonly used in emergency care for patients with severe cardiopulmonary failure or in heart transplant surgery. The ECMO provided in the above embodiments of this disclosure and the extracorporeal circulation device provided in the embodiments of this disclosure are based on the same inventive concept and have the same beneficial effects, and will not be described in detail here.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An extracorporeal circulation device, characterized in that, include: Pressure detection device, power pump, flow detection device, and main unit; The pressure detection device, the flow detection device, and the power pump are all electrically connected to the main unit. The pressure detection device is installed at the input end connection pipe of the power pump; the flow detection device is installed on the connection pipe of the extracorporeal circulation device. The pressure detection device is used to monitor the input pressure of the power pump in real time and send the input pressure to the host. The flow detection device is used to monitor the blood flow in the connecting tube of the extracorporeal circulation device in real time and send the blood flow to the host; the host is used to determine that a wall adhesion situation has occurred when the input pressure and the blood flow meet the preset conditions, and automatically reduce the initial speed of the power pump; The host is also used to gradually increase the speed of the power pump to the initial speed after reducing the initial speed of the power pump to the preset speed.

2. The extracorporeal circulation device according to claim 1, characterized in that, The flow detection device includes an ultrasonic flow meter.

3. The extracorporeal circulation device according to claim 1, characterized in that, The power pump includes a centrifugal pump or a rolling pump.

4. The extracorporeal circulation device according to claim 1, characterized in that, Also includes: Oxygenator; the output end of the power pump is connected to the input end of the oxygenator via a connecting pipe; the flow detection device is installed on the connecting pipe between the power pump and the oxygenator.

5. The extracorporeal circulation device according to claim 1, characterized in that, The host is also used to determine that the extracorporeal circulation device is in a state of drainage obstruction when the number of times the input pressure and the blood flow meet the preset conditions is greater than the preset number.

6. The extracorporeal circulation device according to claim 1, characterized in that, The host also includes an early warning module; the early warning module is used to issue an early warning when it is determined that the wall-attaching situation has occurred.

7. The extracorporeal circulation device according to claim 1, characterized in that, The host also includes a display module; the display module is used to display the status information of the extracorporeal circulation device.

8. The extracorporeal circulation device according to claim 1, characterized in that, The host also includes an automatic wall-adhesion detection and deactivation module; the automatic wall-adhesion detection and deactivation module is used to receive a user trigger and disable the operation of automatically reducing the initial speed of the power pump when the speed of the power pump needs to be manually adjusted.

9. An extracorporeal membrane oxygenation (ECMO) device, characterized in that, Includes the extracorporeal circulation device as described in any one of claims 1-8.

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