Interventional pump flow catheter and interventional pump flow catheter system

Abstract

The utility model provides an intrusive pump flow catheter and an intrusive pump flow catheter system.The intrusive pump flow catheter is characterized in that a perfusion pipeline in the intrusive pump flow catheter is used for being detachably connected with a perfusion pump, the perfusion pipeline communicates with an infusion pump of a fluid pipe, and a first balloon is located between a perfusion one-way valve and the infusion pump and used for storing perfusate with preset pressure; the first balloon can continuously convey the perfusate to the infusion pump by means of the elastic restoring force of the first balloon. The first balloon can continuously convey perfusate to the infusion pump through the elastic restoring force of the first balloon, so that when the infusion pump is detached, the first balloon can continuously convey the perfusate to the infusion pump through the elastic restoring force of the first balloon, and the possibility that blood enters an inner cavity of the infusion pump is avoided; and the possibility of blood return of the intrusive pump flow catheter is reduced, so that the possibility that the infusion pump is influenced by the blood return is reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an interventional pump flow catheter and an interventional pump flow catheter system. Background Technology

[0002] An interventional pump-flow catheter is a catheter inserted into the human body and equipped with a fluid aspiration pump. It can be used to treat vascular or non-vascular diseases and can include blood-pumping catheters and thrombus aspiration catheters. Taking a blood-pumping catheter as an example, the heart is a vital organ that provides the power for blood circulation in the human body. Cardiac output is an important indicator of the strength and normality of the heart's pumping function. For some patients with heart diseases such as heart failure, the cardiac output is insufficient to meet the body's needs, posing a significant threat to their health. Interventional pump-flow catheters, as a way to increase the heart's blood output, have become an important auxiliary device in the treatment of patients with heart disease.

[0003] When an interventional pump-flow catheter fails to properly infuse the perfusion fluid, backflow of blood can occur in the fluid tube within the catheter, potentially leading to thrombosis inside the aspiration pump and rendering it inoperable. Therefore, minimizing backflow is crucial for the proper functioning of interventional pump-flow catheters. Consequently, ensuring sustained continuous perfusion of interventional pump-flow catheters is receiving increasing attention from those skilled in the art. Utility Model Content

[0004] In view of the above problems, this application provides an interventional pump flow catheter and an interventional pump flow catheter system, which can realize continuous infusion of perfusion fluid, which helps to reduce the possibility of blood backflow affecting the aspiration pump.

[0005] In a first aspect, this application provides an interventional pump flow conduit, which includes a fluid tube and an infusion and drainage assembly. The fluid tube is equipped with a pump, and the infusion and drainage assembly includes a first balloon, an infusion check valve, and an infusion line. The infusion line is detachably connected to the infusion pump and is connected to the pump. The infusion check valve and the first balloon are disposed in the infusion line. The first balloon is located between the infusion check valve and the pump to store infusion fluid at a preset pressure. The first balloon can continuously deliver the infusion fluid to the pump using its own elastic restoring force.

[0006] According to some embodiments of the present application, the interventional pump flow catheter includes a first balloon comprising a main body portion having a cavity, the main body portion comprising a first part and a second part connected to each other, the first part having at least two parts, and a second part being provided between two adjacent first parts; in its original state, the diameter of the second part of the first balloon is configured to be smaller than the diameter of the first part.

[0007] According to some embodiments of this application, the interventional pump flow conduit includes a first interface and a second interface, wherein the first interface is connected between a first part and a pump, and the second interface is connected between another first part and an infusion check valve.

[0008] According to some embodiments of this application, the interventional pump flow conduit has a first part with multiple interfaces along a first direction, and a first interface and a second interface are respectively connected to two first parts at both ends of the first direction.

[0009] According to some embodiments of the present application, the wall thickness of the second part of the interventional pump flow conduit is configured to be greater than that of the first part.

[0010] According to some embodiments of the present application, the Shore hardness of the wall of the first balloon is set to C, 30D≤C≤70D, and the wall thickness of the first balloon is set to D, 0.05mm≤D≤0.35mm.

[0011] According to some embodiments of this application, the interventional pumping conduit further includes a protective member having a cavity in which a first balloon is disposed.

[0012] According to some embodiments of this application, the infusion drainage assembly further includes a drainage check valve and a drainage pipeline. The drainage pipeline is connected to the pump and is used to drain the infusion fluid. The drainage check valve is disposed in the drainage pipeline.

[0013] According to some embodiments of this application, the interventional pumping catheter is configured as a blood pumping catheter or a thrombus aspiration catheter.

[0014] Secondly, some embodiments of this application also provide an interventional pump flow conduit system, which includes an infusion pump, a controller, and an interventional pump flow conduit provided by any of the above technical solutions; the infusion pump is connected to the infusion pipeline; the controller is electrically connected to the pump and the infusion pump, and the controller is configured to control the operation of the pump and control the infusion pump to supply infusion fluid to the infusion pipeline.

[0015] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0016] This application provides an interventional pump flow conduit, which includes a fluid tube and an infusion and drainage assembly. The fluid tube is equipped with a pump, and the infusion and drainage assembly includes a first balloon, an infusion check valve, and an infusion line. The infusion line is detachably connected to the infusion pump and is connected to the pump of the fluid tube. The infusion check valve and the first balloon are disposed in the infusion line. The first balloon is located between the infusion check valve and the pump to store infusion fluid at a preset pressure. The first balloon can use its own elastic restoring force to continuously deliver the infusion fluid to the pump. In the above structure, since the perfusion tubing is detachably connected to the perfusion pump and the first balloon, which can store perfusion fluid at a preset pressure, can continuously deliver the perfusion fluid to the aspiration pump using its own elastic restoring force, even when the perfusion pump is removed, the first balloon can still continuously deliver the perfusion fluid to the aspiration pump using its own elastic restoring force. This allows the perfusion fluid to still fill the inner cavity of the aspiration pump, preventing blood from entering the inner cavity of the aspiration pump, reducing the possibility of backflow of blood in the interventional pump flow tubing, and thus reducing the possibility of the aspiration pump being affected by backflow of blood.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the interventional pump flow conduit provided in the first embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the first balloon in the interventional pump flow catheter provided in some embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the first balloon in the interventional pump flow catheter provided in some other embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the interventional pump flow conduit provided in the second embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the interventional pump flow conduit provided in the third embodiment of this application;

[0024] Figure 6This is a schematic diagram of an interventional pump flow conduit system provided in some embodiments of this application.

[0025] In the diagram:

[0026] 1. Fluid tubing; 11. Pump; 21. First balloon; 211. Main body; 2111. First part; 2112. Second part; 212. First interface; 213. Second interface; 22. Infusion check valve; 23. Infusion line; 24. Drain check valve; 25. Drain line; 26. Filter; 27. Second balloon; 3. Infusion pump; 4. Controller; 5. Protective component; X, First direction. Detailed Implementation

[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0028] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0029] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0030] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0031] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0032] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] An interventional pump flow catheter is a catheter equipped with a fluid aspiration pump that can be inserted into the human body. It can be used to treat diseases of the vascular system or non-vascular system. For example, an interventional pump flow catheter can be inserted into the human vascular system as a component of a blood pumping device to assist in the delivery of blood; that is, an interventional pump flow catheter is a blood pumping catheter. It can also be used to aspirate and filter thrombi in the blood, facilitating the removal of thrombi from the body; that is, an interventional pump flow catheter is a thrombus aspiration catheter.

[0034] It is understood that the interventional pumping catheter in this application can also be used in applications such as tissue fluid pumping devices and digestive fluid pumping devices to achieve the purpose of pumping tissue fluid, digestive fluid and other fluids. For ease of understanding and description, the following will continue to describe the application scenario of the interventional pumping catheter in a blood pumping device as an example.

[0035] The heart is a vital organ that powers the body's blood circulation. Cardiac output is an important indicator of the strength and normality of the heart's pumping function. When suffering from heart diseases such as heart failure, the heart's output may be insufficient to meet the body's needs, making interventional pump catheter systems an important treatment option.

[0036] In some applications, the interventional pump-flow catheter system is a blood-pumping catheter. This catheter passes through the skin surface, enters the aortic vascular system via a femoral artery puncture, crosses the aortic arch and aortic valve, and enters the left ventricle. A blood flow channel is formed between the left ventricle and the aorta, with the entrance in the left ventricle and the exit in the aorta. The pump-flow catheter, through a transmission system and the high-speed rotation of an impeller, delivers blood from the left ventricle into the aorta, from where it flows to all tissues and organs throughout the body. This provides auxiliary circulatory support for patients, reduces the burden on the heart and oxygen consumption, and helps in the recovery of cardiac function.

[0037] In interventional pump-flow catheter systems, the pumping catheter typically includes a perfusion line. This perfusion line delivers perfusion fluid (glucose solution) to the aspiration pump, lubricating and cooling the pump within the body. In systems with both perfusion and drainage lines, the perfusion fluid, after flowing through the perfusion line to the aspiration pump, lubricates and cools components such as the pump's bearings and drive shaft before flowing out through the drainage line, minimizing the risk of injury to the patient from the interventional pump-flow catheter system.

[0038] In addition, after the perfusion fluid flows into the aspiration pump, it fills the cavities inside the pump. For externally driven interventional pumping conduits, these cavities can be gaps such as bearing clearances, the gap between the drive shaft and the bushing, and the gap between adjacent sleeves. For internally driven interventional pumping conduits, these cavities can be gaps such as bearing clearances, the gap between the drive shaft and the bushing, and the gap between adjacent sleeves, as well as gaps between internal motors, such as the gap between two spaced components, or gaps created on other components. The perfusion fluid separates the components inside the aspiration pump from the blood, reducing the possibility of contact between the components and the blood, making it less likely for blood to flow back into the aspiration pump and form a thrombus, thus allowing the aspiration pump to operate smoothly. However, in the event of a product malfunction or when the perfusion pump is replaced, the perfusion line may fail to supply perfusion fluid to the aspiration pump in a timely manner, allowing blood to easily flow back to the aspiration pump, which can easily affect the normal operation of the aspiration pump.

[0039] To enable continuous perfusion fluid delivery through the pumping catheter and reduce the potential impact of blood return on the motor, this application provides an interventional pumping catheter. The catheter includes a fluid tube and an perfusion / drainage assembly. The fluid tube houses a suction pump. The perfusion / drainage assembly includes a first balloon, a one-way perfusion valve, and a perfusion line. The perfusion line is detachably connected to the perfusion pump and is connected to the suction pump in the fluid tube. The one-way perfusion valve and the first balloon are disposed within the perfusion line. The first balloon, located between the one-way perfusion valve and the suction pump, stores perfusion fluid at a preset pressure. The first balloon utilizes its elastic restoring force to continuously deliver the perfusion fluid to the suction pump. In the above structure, since the perfusion tubing is detachably connected to the perfusion pump and the first balloon, which can store perfusion fluid at a preset pressure, can use its own elastic restoring force to continuously deliver the perfusion fluid to the aspiration pump, even when the perfusion pump is removed, the first balloon can still use its own elastic restoring force to continuously deliver the perfusion fluid to the aspiration pump, so that the perfusion fluid can still fill the aspiration pump, preventing blood from entering the aspiration pump cavity, reducing the possibility of backflow of blood in the interventional pump flow tubing, and thus reducing the possibility of the aspiration pump being affected by backflow of blood.

[0040] The technical solution of the interventional pump flow conduit and interventional pump flow conduit system provided in this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] This application provides an interventional pump flow conduit, such as... Figure 1 As shown, the interventional pump flow conduit includes a fluid pipe 1 and an infusion and drainage assembly (not shown in the figure). A pump 11 is installed in the fluid pipe 1. Under the action of the pump 11, the fluid flows through the fluid pipe 1 and then flows out. The infusion and drainage assembly includes a first balloon 21, an infusion check valve 22, and an infusion line 23. The infusion line 23 is used to detachably connect to the infusion pump 3. The infusion line 23 is connected to the pump 11 in the fluid pipe 1. The infusion pump 3 is used to introduce infusion fluid into the pump 11 through the infusion line 23 to prevent fluid from entering the pump 11. The infusion check valve 22 and the first balloon 21 are disposed in the infusion line 23. The first balloon 21 is located between the infusion check valve 22 and the pump 11 to store infusion fluid at a preset pressure. The first balloon 21 can use its own elastic restoring force to continuously deliver the infusion fluid to the pump 11.

[0042] The fluid tube 1 refers to a tubular component capable of carrying blood, which has an aspiration port and an outlet spaced apart and connected to each other, allowing blood entering through the aspiration port to flow out through the outlet. As the main component of the blood pumping catheter assembly, the fluid tube 1 crosses the aortic valve. At this point, the aspiration port is located in the left ventricle, and the outlet is located in the aorta, allowing blood to enter the aorta from the left ventricle through the fluid tube 1.

[0043] The pump 11 refers to a pump body capable of transporting blood in a specific direction. The pump 11 is installed in the fluid pipe 1 to smoothly transport blood from the suction port to the outlet port, thereby delivering blood from the left ventricle to the aorta and realizing the pumping of blood throughout the system.

[0044] The pump 11 can be an impeller pump, with its impeller positioned within the fluid pipe 1. When the impeller rotates, it transports blood from the suction inlet to the outlet. In some applications, the impeller is located at the outlet of the fluid pipe 1. Alternatively, the pump 11 may integrate a motor, with the motor's output connected to the impeller drive, enabling the impeller to rotate and thus transport blood. Or, the motor may be located outside the body, connected to the pump 11 via a drive shaft or other components to drive the impeller and transport blood.

[0045] For example, when the pump 11 integrates a motor, the infusion line 23 can communicate with the inner cavity of the pump 11, including the motor cavity, so that the infusion line 23 can supply infusion fluid into the inner cavity of the pump 11, including the motor cavity. When the motor is located outside the human body, the infusion line 23 communicates with gaps such as bearing clearance and the gap between the drive shaft and the bushing in the pump 11 located inside the human body, so that the infusion line 23 can supply infusion fluid into the inner cavity of the pump 11 inside the human body.

[0046] The perfusion and drainage assembly can be used to introduce perfusion fluid into the pump 11 in the fluid pipe 1 and to discharge waste perfusion fluid. The perfusion fluid introduced not only lubricates and cools the pump 11, but also forms a perfusion fluid zone in the inner cavity of the pump 11 with pressure equal to that of blood, thereby reducing the possibility of blood entering the inner cavity of the pump 11 and coming into contact with the components inside the pump 11, which helps to maintain the normal operation of the pump 11.

[0047] The perfusion line 23 can be a conduit in the perfusion drainage assembly used to introduce perfusion fluid into the suction pump 11. For example, one end of the perfusion line 23 extending outside the body can be connected to the perfusion pump 3, and the other end extending inside the body can be connected to the inner cavity of the suction pump 11. This allows the perfusion pump 3 to deliver perfusion fluid into the perfusion line 23, and the perfusion fluid in the perfusion line 23 can flow along the perfusion line 23 into the inner cavity of the suction pump 11, thereby forming a perfusion fluid zone in the inner cavity of the suction pump 11 with pressure equal to that of the blood, reducing the possibility of blood entering the inner cavity of the suction pump 11.

[0048] The infusion check valve 22 can be a valve installed in the infusion pipeline 23. It is used to keep the infusion fluid in the infusion pipeline 23 flowing towards the pump 11, thereby reducing the possibility of backflow of the infusion fluid.

[0049] The first balloon 21 can be an elastic sphere with an internal cavity, which can serve as a space for containing perfusion fluid and storing perfusion fluid at a certain pressure.

[0050] By installing a first balloon 21 in the perfusion line 23, after the perfusion fluid enters the perfusion line 23, a portion of the perfusion fluid is stored in the first balloon 21 at a preset pressure. By positioning the first balloon 21 between the perfusion check valve 22 and the aspiration pump 11, the perfusion fluid with the preset pressure in the first balloon 21 is less likely to flow back from the perfusion check valve 22 to the perfusion pump 3, but can instead flow towards the aspiration pump 11. Since the first balloon 21 is an elastic sphere and can store perfusion fluid at a preset pressure, even when the perfusion pump 3 is removed or malfunctions causing the perfusion line 23 to stop perfusing new perfusion fluid, the perfusion fluid in the first balloon 21 can still continuously flow towards the aspiration pump 11 at a preset pressure under the elastic restoring force of the first balloon 21. This prevents blood from flowing back into the aspiration pump 11 and affecting its normal operation, and also ensures that replacing the perfusion pump 3 does not significantly affect the normal operation of the aspiration pump 11.

[0051] For example, when the perfusion fluid flowing through the perfusion tubing 23 passes through the first balloon 21, it fills the cavity, causing the first balloon 21 to undergo elastic deformation and the cavity to expand. When a certain positive perfusion pressure is reached, the first balloon 21 fully expands and stores the perfusion fluid. When the perfusion tubing 23 stops flowing with perfusion fluid due to the removal or failure of the perfusion pump 3, the first balloon 21 begins to contract. The perfusion fluid in the first balloon 21 flows to the aspiration pump 11 at a balanced pressure that prevents blood from flowing back into the aspiration pump 11 until the perfusion fluid in the first balloon 21 is completely exhausted, and the first balloon 21 contracts back to its original state.

[0052] The infusion line 23 is used for detachable connection with the infusion pump 3. This means the connection between the infusion line 23 and the infusion pump 3 is detachable, allowing for easy replacement of the infusion pump 3 and reducing the impact of a failure of the infusion pump 3 on the entire interventional pump flow conduit system. For example, the infusion line 23 can be connected to the infusion pump 3 via a threaded connector or a quick connector.

[0053] In the above structure, since the perfusion tubing is detachably connected to the perfusion pump and the first balloon, which can store perfusion fluid at a preset pressure, can continuously deliver the perfusion fluid to the aspiration pump using its own elastic restoring force, even when the perfusion pump is removed, the first balloon can still continuously deliver the perfusion fluid to the aspiration pump using its own elastic restoring force. This allows the perfusion fluid to still fill the inner cavity of the aspiration pump, preventing blood from entering the inner cavity of the aspiration pump, reducing the possibility of backflow of blood in the interventional pump flow tubing, and thus reducing the possibility of the aspiration pump being affected by backflow of blood.

[0054] In some embodiments, reference Figures 2 to 4 The first balloon 21 includes a main body 211 with a cavity. The main body 211 includes a first part 2111 and a second part 2112 connected to each other. There are at least two first parts 2111, and a second part 2112 is provided between two adjacent first parts 2111. In the original state, the diameter of the second part 2112 of the first balloon 21 is configured to be smaller than the diameter of the first part 2111.

[0055] The main body 211 may be the main part of the first balloon 21, which is used to form a cavity for containing the infusion fluid. The first part 2111 and the second part 2112 are different parts of the main body 211 that are connected to each other. There are at least two first parts 2111, and a second part 2112 is provided between two adjacent first parts 2111, so that the main body 2111 is a whole structure.

[0056] In its original state, the diameter of the second part 2112 of the first balloon 21 is configured to be smaller than the diameter of the first part 2111. This means that in the original state where the first balloon 21 is not inflated, the diameter of the second part 2112 is smaller than the diameter of the first part 2111. This results in a region in the middle of the first balloon 21 with a smaller diameter than other parts. This allows the first balloon 21 to better expel the perfusion fluid from the cavity during its retraction back to its original state, which helps to reduce the amount of perfusion fluid retained in the first balloon 21. This allows the first balloon 21 to supply more perfusion fluid to the pump 11 when the perfusion line 23 stops supplying perfusion fluid, thus extending the duration for which the first balloon 21 supplies perfusion fluid to the pump 11.

[0057] Because a second part 2112 is provided between two adjacent first parts 2111 of the first balloon 21 installed on the perfusion line 23 between the perfusion check valve 22 and the aspiration pump 11, the second part 2112 has a smaller diameter in its original state. This allows the first balloon 21 to more thoroughly introduce the perfusion fluid into the aspiration pump 11 through contraction, prolonging the time that the first balloon 21 keeps the perfusion fluid flowing into the aspiration pump 11. This allows the perfusion fluid to be infused into the inner cavity of the aspiration pump 11 for a longer period of time, preventing blood from entering the inner cavity of the aspiration pump and reducing the possibility of backflow in the interventional pump flow conduit, thereby reducing the possibility of the aspiration pump 11 being affected by backflow.

[0058] For example, the first part 2111 may be divided into two groups, with multiple first parts 2111 in each group arranged along a certain direction, and the arrangement directions of the two groups of first parts 2111 intersecting; or multiple first parts 2111 may be arranged sequentially along a specific direction.

[0059] In some embodiments, the first balloon 21 further includes a first interface 212 and a second interface 213, the first interface 212 being connected between a first part 2111 and the pump 11, and the second interface 213 being connected between another first part 2111 and the infusion check valve 22.

[0060] The first interface 212 and the second interface 213 are interface structures for connecting the first balloon 21 to external devices. The first interface 212 is connected between a first part 2111 and the pump 11. Specifically, the first interface 212 extends from the first part 2111 and connects to the infusion tubing 23 between the pump 11 and the first balloon 21, thus connecting the first part 2111 and the pump 11. The second interface 213 is connected between another first part 2111 and the infusion check valve 22. Specifically, the second interface 213 extends from the other first part 2111 and connects to the infusion tubing 23 between the first balloon 21 and the infusion check valve 22, thus connecting the other first part 2111 and the infusion check valve 22.

[0061] By connecting the first interface 212 to a first part 2111 and the second interface 213 to another first part 2111, a second part 2112 with a smaller diameter is formed between the first interface 212 and the second interface 213, so that when the first balloon 21 contracts, the second part 2112 can squeeze more perfusion fluid to the aspiration pump 11.

[0062] In some embodiments, reference Figure 3 The first part 2111 is provided with multiple interfaces along the first direction X, and the first interface 212 and the second interface 213 are respectively connected to the two first parts 2111 at both ends of the first direction X.

[0063] The first part 2111 is provided in multiple ways along the first direction X, which means that the multiple first parts 2111 are arranged sequentially along the first direction X, so that the multiple first parts 2111 are connected in series.

[0064] The first interface 212 and the second interface 213 are respectively connected to two first parts 2111 at both ends of the first direction X. This means that the first interface 212 is connected to the first part 2111 at one end of the first direction X, and the second interface 213 is connected to the first part 2111 at the other end of the first direction X, so that the perfusion fluid entering the first balloon 21 from the second interface 213 can be squeezed out by the second part 2112 in the whole first balloon 21 to the suction pump 11.

[0065] In some embodiments, the wall thickness of the second portion 2112 is configured to be greater than the wall thickness of the first portion 2111.

[0066] By configuring the wall thickness of the second part 2112 to be greater than that of the first part 2111, the structural strength of the second part 2112 is greater than that of the first part 2111. This not only improves the structural strength of the first balloon 21, but also enhances the rebound strength of the second part 2112, enabling the first balloon 21 to provide a greater inlet pressure for the infusion fluid to be introduced into the pump 11.

[0067] In some embodiments, the interventional pump flow conduit also includes a filter 26 disposed in the infusion line 23 and located between the infusion check valve 22 and the pump 11.

[0068] The filter 26 can filter out air bubbles and microorganisms from the flowing perfusion fluid. By placing the filter 26 in the perfusion pipeline 23 between the perfusion check valve 22 and the pump 11, the perfusion fluid entering the pump 11 can be filtered by the filter 26, reducing the possibility of the perfusion fluid affecting the human body.

[0069] In some embodiments, the Shore hardness of the wall of the first balloon 21 is set to C, 30D≤C≤70D, and the wall thickness of the first balloon 21 is set to D, 0.05mm≤D≤0.35mm.

[0070] By setting the Shore hardness C of the wall of the first balloon 21 to a range of 30D≤C≤70D and the wall thickness D of the first balloon 21 to a range of 0.05mm≤D≤0.35mm, the first balloon 21 can not only expand under lower positive pressure, but also has good structural strength and a long service life.

[0071] For example, the Shore hardness C of the wall of the first balloon 21 can be set to a range of 30D≤C≤45D, and the wall thickness D of the first balloon 21 can be set to a range of 0.05mm≤D≤0.2mm. Preferably, the Shore hardness C of the wall of the first balloon 21 can be set to 30D, 35D, 40D or 45D, and the wall thickness D of the first balloon 21 can be set to 0.05mm, 0.1mm, 0.15mm or 0.2mm. This not only allows the first balloon 21 to inflate under lower normal pressure, but also gives the first balloon 21 good structural strength and a longer service life.

[0072] For example, the diameter E of the first balloon 21 can be set to the range of 4mm≤E≤30mm.

[0073] In some embodiments, reference Figure 4 Multiple first balloons 21 are provided, and the multiple first balloons 21 are connected in parallel or in series.

[0074] The multiple first balloons 21 connected in parallel or in series can mean that the multiple first balloons 21 in the infusion line 23 are connected in series with each other, or that the multiple first balloons 21 in the infusion line 23 are connected in parallel with each other. For example, the multiple first balloons 21 in the infusion line 23 can also be connected in series and then in parallel with the first balloon 21, so that the multiple first balloons 21 can increase the capacity for containing the infusion fluid.

[0075] For example, the first balloon 21 may be made of polyether block amide, thermoplastic polyurethane elastomer, polyethylene, thermoplastic elastomer, polyvinyl chloride, polytetrafluoroethylene, fluoroethylene propylene copolymer, synthetic latex (polyisoprene), silicone or natural latex, so that the safe expansion volume coefficient of the first balloon 21 can be 2 to 8 times that of the original initial state.

[0076] In some embodiments, the interventional pump flow conduit further includes a protective member 5, which has a cavity in which a first balloon 21 is disposed.

[0077] The protective element 5 can be a device used to protect the first balloon 21. The cavity can be a cavity structure in the protective element 5. By placing the first balloon 21 in the cavity, the protective element 5 can limit the ultimate expansion volume of the first balloon 21, making the first balloon 21 less likely to burst under high pressure.

[0078] In some embodiments, the protective element 5 is configured as a light-shielding structure.

[0079] The protective component 5 is configured as a light-shielding structure, which means that the protective component 5 can block strong light. By configuring the protective component 5 as a light-shielding structure, the first balloon 21 is less likely to suffer from cracks, wrinkles, or other adverse problems under strong light.

[0080] In some embodiments, the protective element 5 is configured as a transparent or semi-transparent structure.

[0081] By configuring the protective component 5 as a transparent or semi-transparent structure, the user can easily observe the expansion and deflation of the first balloon 21 from the outside. For example, the protective component 5 can be made of colors such as brown, amber, or dark blue, which have good light-blocking effects, to shield against strong light and ultraviolet radiation.

[0082] In some embodiments, the infusion drainage assembly further includes a drainage check valve 24 and a drainage line 25, the drainage line 25 being connected to the pump 11 for discharging the infusion fluid; the drainage check valve 24 is disposed in the drainage line 25.

[0083] The drainage line 25 can be a conduit in the infusion drainage assembly used to drain the perfusion fluid from the pump 11 in the fluid tube 1, so as to prevent waste perfusion fluid from remaining in the human body. For example, one end of the drainage line 25 extending outside the human body can be connected to the infusion pump 3, and the other end extending into the human body can be connected to the fluid tube 1, allowing the infusion pump 3 to draw the perfusion fluid into the drainage line 25, and the perfusion fluid in the drainage line 25 can be discharged out of the body along the drainage line 25 and flow back to the infusion pump 3.

[0084] The drain check valve 24 can be a valve installed in the drain line 25. It can not only keep the perfusion waste liquid in the drain line 25 flowing away from the pump 11, reducing the possibility of the perfusion waste liquid flowing back to the pump 11, but also use its own opening pressure to make the perfusion liquid in the pump 11 in the fluid line 1 have a certain pressure, which helps to reduce the possibility of blood flowing back to the pump 11.

[0085] In some embodiments, reference Figure 5 The infusion drainage assembly also includes a second balloon 27, which is disposed in the drainage pipeline 25 and located between the drainage check valve 24 and the pump 11.

[0086] Like the first balloon 21, the second balloon 27 is an elastic sphere with an internal cavity. The internal cavity can serve as a space to hold the infusion fluid and store the infusion fluid at a certain pressure.

[0087] By setting a second balloon 27 in the drainage line 25, after the infusion fluid is introduced into the drainage line 25, part of the infusion fluid will be stored in the second balloon 27 at a preset pressure, which can better maintain the infusion fluid with a certain pressure in the pump 11 in the fluid line 1.

[0088] Some embodiments of this application also provide an interventional pump flow conduit system, see reference. Figure 6 The interventional pump flow conduit system includes the interventional pump flow conduit, the infusion pump 3 and the controller 4 provided by the above technical solution. The controller 4 is electrically connected to the pump 11 and the infusion pump 3 via cables. The controller 4 is configured to control the operation of the pump 11 and to control the infusion pump 3 to supply infusion fluid to the infusion line 23.

[0089] In this embodiment, the controller 4 can be a centralized or distributed controller 4. For example, the controller 4 can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control the temperature regulating tube and the temperature measuring tube to achieve their functions.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application 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 or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An interventional pump flow conduit, characterized in that, include: A fluid tube, wherein a liquid pump is provided in the fluid tube; The perfusion and drainage assembly includes a first balloon, a perfusion check valve, and a perfusion line. The perfusion line is detachably connected to the perfusion pump and is connected to the suction pump. The perfusion check valve and the first balloon are disposed in the perfusion line. The first balloon is located between the perfusion check valve and the suction pump to store perfusion fluid at a preset pressure. The first balloon can continuously deliver the perfusion fluid to the suction pump using its own elastic restoring force.

2. The interventional pump flow conduit according to claim 1, characterized in that, The first balloon includes a main body portion having a cavity, the main body portion including a first part and a second part connected to each other, the first part having at least two parts, and the second part being provided between two adjacent first parts; in the original state, the diameter of the second part of the first balloon is configured to be smaller than the diameter of the first part.

3. The interventional pump flow conduit according to claim 2, characterized in that, The first balloon also includes a first interface and a second interface, the first interface being connected between one of the first parts and the pump, and the second interface being connected between the other first part and the infusion check valve.

4. The interventional pump flow conduit according to claim 3, characterized in that, The first part is provided with multiple interfaces along the first direction, and the first interface and the second interface are respectively connected to the two first parts at both ends of the first direction.

5. The interventional pump flow conduit according to claim 2, characterized in that, The wall thickness of the second part is configured to be greater than that of the first part.

6. The interventional pump flow conduit according to claim 1, characterized in that, The Shore hardness of the wall of the first balloon is set to C, 30D≤C≤70D, and the wall thickness of the first balloon is set to D, 0.05mm≤D≤0.35mm.

7. The interventional pump flow conduit according to claim 1, characterized in that, The interventional pump flow conduit also includes a protective element, which forms a cavity in which the first balloon is disposed.

8. The interventional pump flow conduit according to claim 1, characterized in that, The infusion drainage assembly further includes a drainage check valve and a drainage pipeline. The drainage pipeline is connected to the pump and is used to drain the infusion fluid. The drainage check valve is located in the drainage pipeline.

9. The interventional pump flow conduit according to claim 8, characterized in that, The interventional pumping catheter is configured as a blood pumping catheter or a thrombus aspiration catheter.

10. An interventional pump flow conduit system, characterized in that, include: The interventional pump flow conduit as described in any one of claims 1 to 9; An injection pump is connected to the injection pipeline; A controller, electrically connected to the pump and the infusion pump, is configured to control the operation of the pump and to control the infusion pump to supply infusion fluid to the infusion line.

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