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 comprises a fluid pipe and a perfusion drainage assembly, an infusion pump is arranged in the fluid pipe, the perfusion drainage assembly comprises a pressure storage part, a perfusion one-way valve and a perfusion pipeline, and a pressure storage cavity is defined by the retraction wall face and the expansion wall face of a pressure storage body in the pressure storage part; the elastic film is arranged in the pressure storage cavity and protrudes towards the retraction wall face in the initial state, a first cavity used for storing preset pressure perfusate is defined by the elastic film and the retraction wall face, and a second cavity used for providing deformation space for the elastic film is defined by the elastic film and the expansion wall face. Due to the fact that the elastic film is arranged in the mode of protruding towards the retraction wall face in the initial state, the elastic film can push more perfusate to the infusion pump under the action of the elastic restoring force of the elastic film, the duration of continuous infusion of the perfusate is prolonged, the possibility of blood return of the intrusive pump flow catheter is reduced, and the intrusive pump flow catheter is more convenient to use. Therefore, the possibility that the infusion pump is influenced by blood return is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an interventional pump flow catheter and an interventional pump flow catheter system. BACKGROUND

[0002] The interventional pump flow catheter is a catheter provided with a liquid pumping pump and capable of being inserted into a human body, which can be used for the treatment of diseases in the vascular system or non-vascular system, and can include a blood pumping catheter and a thrombus suction catheter, etc. Taking the blood pumping catheter as an example, the heart is an important organ for providing power for blood circulation of the human body. The cardiac output of the heart is an important index for measuring the strength and normality of the cardiac ejection function. For some patients with heart diseases such as heart failure, the cardiac output of the heart is difficult to meet the needs of the body, which brings great threat to the health of the body. With the blood pumping catheter as a way to improve the cardiac output of the heart, it has become an important auxiliary device for patients with heart diseases in the treatment process.

[0003] When the blood pumping catheter cannot normally perfuse the perfusion liquid, the fluid pipe of the blood pumping catheter in the human body will have backflow of blood, and the blood will enter the inside of the liquid pumping pump to form a thrombus, so that the liquid pumping pump cannot continue to work. Therefore, it is necessary to minimize the occurrence of backflow of blood for the normal operation of the interventional pump flow catheter. Therefore, how to keep the interventional pump flow catheter continuously perfused for a long time has attracted more and more attention of those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides an interventional pump flow catheter and an interventional pump flow catheter system, which can prolong the time length of continuous perfusion of the perfusion liquid, and is beneficial to reduce the possibility of the liquid pumping pump being affected by backflow of blood.

[0005] In a first aspect, the present application provides an interventional pump flow catheter, which comprises a fluid pipe and a perfusion and drainage assembly, and the fluid pipe is provided with a liquid pumping pump; the perfusion and drainage assembly comprises a pressure storage member, a perfusion one-way valve and a perfusion pipeline, and the perfusion pipeline is communicated with the liquid pumping pump; the perfusion one-way valve and the pressure storage member are arranged in the perfusion pipeline, and the pressure storage member is located between the perfusion one-way valve and the liquid pumping pump; the pressure storage member comprises a pressure storage body, and the pressure storage body comprises a seat body and an elastic membrane; the seat body is formed with a retraction wall surface and an expansion wall surface, and the retraction wall surface and the expansion wall surface enclose a pressure storage cavity; the elastic membrane is arranged in the pressure storage cavity, and the elastic membrane is arranged to protrude towards the retraction wall surface in an initial state; the elastic membrane and the retraction wall surface enclose a first cavity for storing a preset pressure perfusion liquid; and the elastic membrane and the expansion wall surface enclose a second cavity for providing a deformation space for the elastic membrane.

[0006] According to the interventional pump flow catheter provided by some embodiments of the present application, the seat body is provided with a liquid inlet channel and a liquid outlet channel penetrating through the retraction wall surface, the liquid inlet channel communicates the first cavity with the perfusion one-way valve, and the liquid outlet channel communicates the liquid pumping pump with the first cavity.

[0007] According to the interventional pump flow guide tube provided by some embodiments of the present application, the seat body is formed with at least two pressure storage cavities, and a first cavity of the at least two pressure storage cavities is arranged in parallel.

[0008] According to the interventional pump flow guide tube provided by some embodiments of the present application, the retraction wall surface and the expansion wall surface are both configured as arc surfaces.

[0009] According to the interventional pump flow guide tube provided by some embodiments of the present application, the Shore hardness of the elastic film is set as A, 30D≤A≤70D, and the thickness of the elastic film is set as B, 0.05mm≤B≤0.35mm.

[0010] According to the interventional pump flow guide tube provided by some embodiments of the present application, the pressure storage member further comprises a balloon, and the balloon is connected in series or in parallel with the pressure storage body.

[0011] According to the interventional pump flow guide tube provided by some embodiments of the present application, the interventional pump flow guide tube comprises a protection member, the protection member is formed with a containing cavity, and the balloon is arranged in the containing cavity.

[0012] According to the interventional pump flow guide tube provided by some embodiments of the present application, the interventional pump flow guide tube is configured as a blood pump guide tube or a thrombus suction guide tube.

[0013] According to the interventional pump flow guide tube provided by some embodiments of the present application, the perfusion drainage assembly further comprises a drainage one-way valve and a drainage pipeline, the drainage pipeline is communicated with the liquid suction pump, so as to discharge the perfusion liquid of the liquid suction pump, and the drainage one-way valve is arranged in the drainage pipeline.

[0014] In the second aspect, some embodiments of the present application further provide an interventional pump flow guide tube system, which comprises a perfusion pump, a controller and the interventional pump flow guide tube provided by any one of the technical solutions, the perfusion pump is communicated with a perfusion pipeline, the controller is electrically connected with the liquid suction pump and the perfusion pump, and the controller is configured to control the operation of the liquid suction pump and control the perfusion pump to introduce perfusion liquid into the perfusion pipeline.

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

[0016] The application provides an interventional pump flow catheter, which comprises a fluid pipe and a perfusion drainage assembly, the fluid pipe is provided with a liquid pumping device, the perfusion drainage assembly comprises a pressure storage component, a perfusion one-way valve and a perfusion pipeline, the perfusion pipeline is communicated with the liquid pumping device; the perfusion one-way valve and the pressure storage component are arranged in the perfusion pipeline, and the pressure storage component is located between the perfusion one-way valve and the liquid pumping device; the pressure storage component comprises a pressure storage body, the pressure storage body comprises a seat body and an elastic membrane, the seat body is formed with a retraction wall surface and an expansion wall surface, the retraction wall surface and the expansion wall surface enclose a pressure storage cavity, the elastic membrane is arranged in the pressure storage cavity, the elastic membrane is arranged to protrude towards the retraction wall surface in an initial state, the elastic membrane and the retraction wall surface enclose a first cavity for storing perfusion liquid of a preset pressure, and the elastic membrane and the expansion wall surface enclose a second cavity for providing a deformation space for the elastic membrane. In the above structure, part of the perfusion liquid introduced from the perfusion pipeline exists in the first cavity under a certain pressure, when the perfusion pipeline stops introducing the perfusion liquid, the elastic membrane pushes the perfusion liquid into the liquid pumping device under the action of the elastic restoring force of the elastic membrane, the heat of the liquid pumping device is taken away, and the surrounding fluid is prevented from entering the liquid pumping device, thereby prolonging the use stability and service life of the liquid pumping device. Since the elastic membrane is arranged to protrude towards the retraction wall surface in the initial state, the elastic membrane can push more perfusion liquid into the liquid pumping device under the action of the elastic restoring force of the elastic membrane, the time length of continuous introduction of the perfusion liquid under the condition of stopping perfusion is prolonged, the inner cavity of the liquid pumping device can be separated from blood for a longer time, the possibility of backflow of blood under abnormal conditions of the interventional pump flow catheter is reduced, and the possibility of the liquid pumping device being affected by the backflow of blood is reduced.

[0017] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in the attached drawings refer to the same or similar components. In the drawings:

[0019] Figure 1 A schematic view of an interventional pump flow catheter provided by the first embodiment of the application;

[0020] Figure 2 A sectional view of a pressure storage body in an interventional pump flow catheter provided by some embodiments of the application;

[0021] Figure 3 A top view of a pressure storage body in an interventional pump flow catheter provided by some embodiments of the application;

[0022] Figure 4 Schematic diagram of an interventional pump flow guide tube provided by a second embodiment of the present application;

[0023] Figure 5 Schematic diagram of an interventional pump flow guide tube provided by a third embodiment of the present application.

[0024] In the figure: 1, fluid tube; 11, liquid suction pump; 21, pressure storage; 211, pressure storage body; 2111, seat body; 21111, main body; 211111, retraction wall surface; 21112, gland; 211121, expansion wall surface; 21113, pressing plate; 2112, elastic film; 2113, pressure storage cavity; 21131, first cavity; 21132, second cavity; 2114, liquid inlet passage; 2115, liquid outlet passage; 2116, air hole; 212, balloon; 22, perfusion one-way valve; 23, perfusion pipeline; 24, liquid discharge one-way valve; 25, liquid discharge pipeline; 26, filter; 3, perfusion pump; 4, controller; 5, protection. DETAILED DESCRIPTION

[0025] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by the skilled person in the field to which the embodiments of the present application belong.

[0027] In the description of the embodiments of the present application, the orientations or positional relationships indicated by 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" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0028] In addition, the technical terms "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] The interventional pump flow catheter is a catheter provided with a liquid pumping pump and capable of being intervened into the human body, which can be used for the treatment of vascular system or non-vascular system diseases. Exemplarily, the interventional pump flow catheter can be intervened into the vascular system of the human body as a component of a blood pumping device to assist in the delivery of blood, that is, the interventional pump flow catheter is a blood pumping catheter; it can also be used for pumping and filtering thrombus in blood, facilitating the removal of thrombus in the human body to the outside of the body, that is, the interventional pump flow catheter is a thrombus pumping catheter.

[0032] It can be understood that the interventional pump flow catheter in the present application can also be applied to tissue fluid pumping devices, digestive fluid pumping devices and the like application scenarios to achieve the purpose of pumping tissue fluid, digestive fluid and the like fluid. In order to facilitate understanding and description, the application of the interventional pump flow catheter in the application scenario of the blood pumping device will be described as an example.

[0033] The heart is an important organ that provides power for blood circulation in the human body. The cardiac output of the heart is an important indicator for measuring the strength and normality of the cardiac ejection function. When suffering from heart failure and other heart diseases, the cardiac output of the heart is difficult to meet the needs of the body, and the interventional pump flow catheter becomes an important treatment means.

[0034] In some application scenarios, the interventional pump flow catheter system is a blood pumping catheter, which passes through the skin surface, enters the aortic vascular system through the femoral artery puncture access, crosses the aortic valve through the aortic arch, enters the left ventricle, and forms a blood flow passage between the left ventricle and the aorta. The inlet of the blood flow passage is located in the left ventricle, and the outlet is located in the aorta. The blood pumping catheter transports the blood in the left ventricle to the aorta through the high-speed rotation of the transmission system and the impeller, and then the blood flows to various tissues and organs of the whole body. It provides auxiliary blood circulation support for the patient, reduces the heart burden and oxygen consumption of the patient, and helps the recovery of heart function.

[0035] The blood pumping catheter in the interventional pump flow catheter system usually has a perfusion pipeline. The perfusion pipeline delivers perfusion fluid (glucose solution) to the liquid pumping pump to lubricate and cool the liquid pumping pump. For a system with a perfusion pipeline and a drainage pipeline, the perfusion fluid can lubricate the bearings, transmission shafts and other components of the liquid pumping pump after flowing through the perfusion pipeline to the liquid pumping pump, and can cool these components, and then flows out from the drainage pipeline, reducing the damage of the interventional pump flow catheter system to the patient.

[0036] In addition, after the perfusion fluid flows into the liquid pumping pump, it fills the cavities in the liquid pumping pump. For an extracorporeal driven interventional pump flow catheter, these cavities can be gaps such as bearing gaps, transmission shaft and shaft sleeve gaps, and gaps between adjacent sleeves. For an intracorporeal driven interventional pump flow catheter, in addition to the gaps such as bearing gaps, transmission shaft and shaft sleeve gaps, and gaps between adjacent sleeves, the gaps between the intracorporeal motors, such as the gaps between two components arranged at intervals, or the gaps formed on other components, etc. The perfusion fluid separates the components in the liquid pumping pump from the blood, reducing the possibility of contact between the components in the liquid pumping pump and the blood, so that the blood is not easy to flow back to the liquid pumping pump to form a blood clot, so that the liquid pumping pump can run smoothly. However, when the product has an adverse event or the perfusion pump of the perfusion pipeline is replaced, the perfusion pipeline cannot continuously infuse perfusion fluid into the liquid pumping pump, and the blood is easy to flow back to the liquid pumping pump, which can affect the normal operation of the liquid pumping pump.

[0037] To prolong the continuous infusion time and reduce the potential impact of blood backflow on the aspiration pump, this application provides an interventional pump flow conduit. This conduit includes a fluid pipe and an infusion / drainage assembly. The fluid pipe houses the aspiration pump, and the infusion / drainage assembly includes a pressure reservoir, an infusion check valve, and an infusion line connected to the aspiration pump. The infusion check valve and the pressure reservoir are located within the infusion line, with the pressure reservoir positioned between the check valve and the aspiration pump. The pressure reservoir includes a pressure storage body, which comprises a seat and an elastic diaphragm. The seat has a retractable wall and an expandable wall, forming a pressure storage cavity. The elastic diaphragm is disposed within the pressure storage cavity, initially convex towards the retractable wall. The elastic diaphragm and the retractable wall form a first cavity for storing infusion fluid at a preset pressure, and the elastic diaphragm and the expandable wall form a second cavity for providing deformation space for the elastic diaphragm. In the above structure, a portion of the perfusion fluid introduced through the perfusion tubing exists in the first chamber under a certain pressure. When the perfusion tubing stops supplying perfusion fluid, the elastic membrane, under its own elastic restoring force, pushes the perfusion fluid into the suction pump, carrying away the heat of the suction pump and preventing surrounding fluid from entering the suction pump, thus extending the stability and service life of the suction pump. Since the elastic membrane is initially convex towards the retractable wall, its own elastic restoring force allows it to push more perfusion fluid into the suction pump, extending the duration of continuous perfusion fluid supply even when perfusion stops. This allows the suction pump's inner chamber to remain separated from the blood for a longer period, reducing the possibility of backflow in abnormal situations of the interventional pump flow conduit, thereby reducing the likelihood of the suction pump being affected by backflow.

[0038] 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.

[0039] 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 drainage assembly (not shown in the figure). A pump 11 is installed in the fluid pipe 1. Under the action of the pump 11, fluid flows through the fluid pipe 1 and then out. The infusion drainage assembly includes a pressure storage component 21, an infusion check valve 22, and an infusion line 23. The infusion line 23 is connected to the pump 11 in the fluid pipe 1 and is used to introduce infusion fluid into the pump 11 to prevent fluid from entering the pump 11. The infusion check valve 22 and the pressure storage component 21 are disposed in the infusion line 23, with the pressure storage component 21 located between the infusion check valve 22 and the pump 11. The pressure storage component 21 includes a pressure storage body 211. Figure 2The pressure storage body 211 comprises a seat body 2111 and an elastic film 2112. The seat body 2111 is formed with a retraction wall surface 211111 and an expansion wall surface 211121, and the retraction wall surface 211111 and the expansion wall surface 211121 enclose a pressure storage cavity 2113. The elastic film 2112 is arranged in the pressure storage cavity 2113. In an initial state, the elastic film 2112 is arranged to protrude towards the retraction wall surface 211111. The elastic film 2112 and the retraction wall surface 211111 enclose a first cavity 21131 for storing a pre-set pressure perfusion liquid. The elastic film 2112 and the expansion wall surface 211121 enclose a second cavity 21132 for providing a deformation space for the elastic film 2112.

[0040] The fluid tube 1 can refer to a tube member capable of passing blood, which is provided with suction ports and flow ports arranged at intervals, and the suction ports and the flow ports are communicated to enable the blood entering the fluid tube 1 from the suction ports to flow out from the flow ports. The fluid tube 1 serves as a main component in the blood pumping catheter assembly, which is used to cross the aortic valve. At this time, the suction ports are located in the left ventricle, and the flow ports are located in the aorta, and the blood can enter the aorta from the left ventricle through the fluid tube 1.

[0041] The liquid pumping pump 11 can refer to a pump body capable of transporting blood, which can transport blood in a certain direction. The liquid pumping pump 11 is arranged in the fluid tube 1 to smoothly transport blood from the suction ports to the flow ports, so as to transport the blood in the left ventricle to the aorta, thereby realizing the pumping of blood.

[0042] The liquid pumping pump 11 can be an impeller pump. The impeller of the impeller pump is arranged in the fluid tube 1, and when the impeller rotates, it can transport blood from the suction ports to the flow ports. In some application scenarios, the impeller is located at the flow ports of the fluid tube 1. The liquid pumping pump 11 can be integrated with a motor. The output end of the motor is in transmission connection with the impeller, and can drive the impeller to rotate, thereby realizing the transportation of blood. Alternatively, the motor is arranged outside the human body, and the motor is in transmission connection with the liquid pumping pump 11 through a transmission shaft or the like, so as to drive the impeller to rotate, thereby realizing the transportation of blood by the system.

[0043] Exemplarily, in the case where the liquid pumping pump 11 is integrated with the motor, the perfusion pipeline 23 can be in communication with the inner cavity of the liquid pumping pump 11 including the motor inner cavity, so as to enable the perfusion pipeline 23 to introduce perfusion liquid into the inner cavity of the liquid pumping pump 11 including the motor inner cavity. In the case where the motor is arranged outside the human body, the perfusion pipeline 23 is in communication with the gaps such as the bearing gap in the liquid pumping pump 11 arranged in the human body, the gap between the transmission shaft and the shaft sleeve, and the like, so as to enable the perfusion pipeline 23 to introduce perfusion liquid into the inner cavity of the liquid pumping pump 11 arranged in the human body.

[0044] The perfusion drainage assembly can be an assembly for perfusing the perfusion fluid into the suction pump 11 in the fluid tube 1 and draining the waste fluid of the perfusion fluid. The perfusion fluid perfused therein not only can lubricate and cool the suction pump 11, but also can form a perfusion fluid area in the inner cavity of the suction pump 11 to be in balance with the blood pressure, so as to reduce the possibility of the blood entering the inner cavity of the suction pump 11 to contact the components in the suction pump 11, and facilitate the suction pump 11 to keep normal operation.

[0045] The perfusion pipeline 23 can be a pipeline in the perfusion drainage assembly for perfusing the perfusion fluid into the suction pump 11. Exemplarily, the end of the perfusion pipeline 23 extending out of the human body can be detachably connected to the perfusion pump 3, and the end of the perfusion pipeline 23 extending into the human body can be communicated with the inner cavity of the suction pump 11, so that the perfusion pump 3 can deliver the perfusion fluid into the perfusion pipeline 23, and the perfusion fluid in the perfusion pipeline 23 can be perfused into the inner cavity of the suction pump 11 along the perfusion pipeline 23, so as to form a perfusion fluid area in the inner cavity of the suction pump 11 to be in balance with the blood pressure, thereby reducing the possibility of the blood entering the inner cavity of the suction pump 11.

[0046] The perfusion one-way valve 22 can be a valve arranged in the perfusion pipeline 23, which is used to keep the perfusion fluid in the perfusion pipeline 23 flowing towards the suction pump 11, and reduce the possibility of the perfusion fluid flowing back.

[0047] The pressure storage 21 can be a container arranged in the perfusion pipeline 23 to store the perfusion fluid with a preset pressure. By arranging the pressure storage 21 in the perfusion pipeline 23, part of the perfusion fluid in the perfusion pipeline 23 can be stored in the pressure storage 21 with a preset pressure. By arranging the pressure storage 21 between the perfusion one-way valve 22 and the suction pump 11, the perfusion fluid with the preset pressure in the pressure storage 21 is not easy to flow back from the perfusion one-way valve 22 to the perfusion pump 3, but can flow towards the suction pump 11.

[0048] Since the perfusion fluid with the preset pressure can be stored in the pressure storage 21, when the perfusion pipeline 23 stops perfusing the new perfusion fluid, the perfusion fluid in the pressure storage 21 can still flow towards the suction pump 11 with the preset pressure, so that the blood is not easy to flow back to the suction pump 11 to affect the normal operation of the suction pump 11.

[0049] The pressure storage body 211 can be a device in the pressure storage member 21 for storing the perfusion liquid with a preset pressure. The seat body 2111 can be a main body 21111 structure in the pressure storage body 211 for connecting and arranging other structures in the pressure storage body 211. The elastic film 2112 can be a device arranged in the pressure storage body 211 for providing flow pressure for the perfusion liquid, which is a film layer structure with elasticity arranged in the pressure storage cavity 2113. It can not only provide a containing space for the perfusion liquid through elastic deformation, but also apply pressure to the perfusion liquid in the containing space through its own elastic restoring force, so that the perfusion liquid obtains flow pressure.

[0050] The retraction wall surface 211111 and the expansion wall surface 211121 are both wall surface structures inside the seat body 2111, which can enclose the pressure storage cavity 2113 for containing the perfusion liquid. The pressure storage cavity 2113 is used as a containing space for arranging the elastic film 2112, which can be deformed in the containing space. The retraction wall surface 211111 is a wall surface structure that the elastic film 2112 protrudes towards in the initial state, and the expansion wall surface 211121 is a wall surface structure that the elastic film 2112 can adhere to in the deformed state, which is used to support the elastic film 2112 in the maximum elastic deformation state and can reduce the deformation of the elastic film 2112 caused by excessive expansion.

[0051] Since the elastic film 2112 protrudes towards the retraction wall surface 211111 in the initial state, the elastic film 2112 can extrude more perfusion liquid from the first cavity during the recovery to the initial state, prolonging the duration of the perfusion liquid continuously flowing into the liquid extraction pump by the pressure storage member 21.

[0052] The first cavity can be a cavity structure enclosed by the elastic film and the retraction wall surface, which is a cavity structure in the pressure storage cavity for storing the perfusion liquid, and can store the perfusion liquid at a preset pressure under the action of the elastic film. The second cavity can be an outside cavity of the first cavity in the pressure storage cavity, which is used to provide a deformation space for the elastic film, so that the elastic film can change between the initial state and the deformed state.

[0053] In the above structure, part of the perfusion liquid flowing into from the perfusion pipeline exists in the first cavity at a certain pressure. When the perfusion pipeline stops flowing in the perfusion liquid, the elastic film pushes the perfusion liquid into the liquid extraction pump under the action of its own elastic restoring force, takes away the heat of the liquid extraction pump, and prevents the surrounding fluid from entering the liquid extraction pump, prolonging the use stability and service life of the liquid extraction pump. Since the elastic film is arranged to protrude towards the retraction wall surface in the initial state, the elastic film can push more perfusion liquid into the liquid extraction pump under the action of its own elastic restoring force, so that the duration of continuous perfusion of the perfusion liquid is prolonged when the perfusion is stopped, the inner cavity of the liquid extraction pump can be separated from the blood for a longer time, and the possibility of backflow of the liquid extraction pump is reduced, thereby reducing the possibility of the liquid extraction pump being affected by backflow.

[0054] In some embodiments, the seat body is provided with a liquid inlet channel and a liquid outlet channel penetrating the retracted wall surface, the liquid inlet channel communicates the first cavity with the perfusion one-way valve, and the liquid outlet channel communicates the first cavity with the liquid extraction pump.

[0055] The liquid inlet channel 2114 is a channel for the perfusion liquid entering the first cavity of the pressure storage body 211 provided on the seat body 2111, and the liquid outlet channel 2115 is a channel for the perfusion liquid in the first cavity of the seat body 2111 to flow out. By penetrating the retracted wall surface 211111 with the liquid inlet channel 2114 and the liquid outlet channel 2115, the perfusion liquid in the first cavity can flow out to the liquid extraction pump 11 under the elastic restoring force of the elastic membrane 2112, so that the pressure storage body 211 can maintain the perfusion liquid flowing into the liquid extraction pump 11 for a long time, thereby prolonging the time of the perfusion liquid continuously flowing into the liquid extraction pump 11 in the interventional pump flow catheter.

[0056] Exemplarily, the seat body 2111 includes a main body 21111, a gland 21112, and a pressing plate 21113, the liquid inlet channel 2114, the liquid outlet channel 2115, and the retracted wall surface 211111 are provided on the main body 21111, the expansion wall surface 211121 is provided on the gland 21112, the gland 21112 covers the retracted wall surface 211111, and the pressing plate 21113 connects the elastic membrane 2112 to the retracted wall surface 211111. Referring to Figure 3 The gland 21112 is provided with a gas permeable hole 2116, which penetrates the expansion wall surface 211121 to communicate the second cavity with the outside, so that the elastic membrane 2112 can deform in the pressure storage cavity 2113, and the first cavity can expand and contract.

[0057] In some embodiments, the seat body 2111 is formed with at least two pressure storage cavities 2113, and the first cavities of the at least two pressure storage cavities 2113 are arranged in parallel.

[0058] By forming at least two communicating pressure storage cavities 2113 in the seat body 2111, the storage space for accommodating perfusion liquid in the pressure storage body 211 is increased.

[0059] By arranging the first cavities of the at least two pressure storage cavities 2113 in parallel, the perfusion liquid in the at least two first cavities can flow out synchronously, and the pressure can decrease synchronously, so that the perfusion liquid in the pressure storage body 211 can decrease slowly, and the flow pressure to the liquid extraction pump 11 can be maintained well.

[0060] In some embodiments, the retracted wall surface 211111 and the expansion wall surface 211121 are both configured as arc surfaces.

[0061] By configuring the retraction wall surface 211111 and the expansion wall surface 211121 as arc surfaces, the possibility of forming an edge in the pressure storage cavity 2113 is reduced, so that the elastic membrane 2112 is not easily damaged during expansion, and the service life of the elastic membrane 2112 is prolonged.

[0062] In some embodiments, the Shore hardness of the elastic membrane 2112 is set as A, 30D≤A≤70D, and the thickness of the elastic membrane 2112 is set as B, 0.05mm≤B≤0.35mm.

[0063] By setting the range of the Shore hardness A of the elastic membrane 2112 as 30D≤A≤70D and the range of the thickness B of the elastic membrane 2112 as 0.05mm≤B≤0.35mm, not only can the elastic membrane 2112 be expanded at a lower positive pressure, but also the elastic membrane 2112 has good structural strength and a longer service life.

[0064] Exemplarily, the range of the Shore hardness A of the elastic membrane 2112 can be set as 30D≤A≤45D, and the range of the thickness B of the elastic membrane 2112 can be set as 0.05mm≤B≤0.2mm. Preferably, the Shore hardness A of the elastic membrane 2112 can be set as 30D, 35D, 40D or 45D, and the thickness B of the elastic membrane 2112 can be set as 0.05mm, 0.1mm, 0.15mm or 0.2mm, not only can the elastic membrane 2112 be expanded at a lower positive pressure, but also the elastic membrane 2112 has good structural strength and a longer service life.

[0065] In some embodiments, the pressure storage member 21 further comprises a balloon 212, and the balloon 212 is connected in series or parallel with the pressure storage body 211.

[0066] The balloon 212 can be an elastic spherical body with an internal cavity, and the internal cavity can serve as a storage space for perfusion liquid. The perfusion liquid flowing through the perfusion pipeline 23 flows through the balloon 212, and when a certain perfusion positive pressure is reached, the balloon 212 is fully inflated and stores the perfusion liquid. When the perfusion pipeline 23 no longer flows through the perfusion liquid, the balloon 212 begins to contract, and the perfusion liquid in the balloon 212 flows to the suction pump 11 at a balance pressure that prevents blood from flowing back into the suction pump 11, until the perfusion liquid in the balloon 212 is completely consumed, and the balloon 212 returns to the original state.

[0067] The balloon 212 can be connected in series or parallel with the pressure storage body 211, which means that the balloon 212 and the pressure storage body 211 can be connected in series in the perfusion pipeline 23, or the balloon 212 and the pressure storage body 211 can be connected in parallel in the perfusion pipeline 23.

[0068] In some embodiments, the balloon 212 can be connected in parallel with the pressure storage body 211 and then connected in series with another balloon 212.

[0069] By providing the pressure storage member 21 with the balloon 212, the space for containing the perfusion liquid in the perfusion pipeline 23 is increased, so that the interventional pump flow conduit has better ability to store the perfusion liquid with a preset pressure, which is conducive to further enabling the pressure storage body 211 to keep the perfusion liquid supplied to the liquid pumping pump 11 for a long time, and prolonging the time for the liquid pumping pump 11 to continuously supply the perfusion liquid in the interventional pump flow conduit.

[0070] The balloon 212 can provide a larger expansion volume and an adaptive deformation state compared with the pressure storage body 211, which is conducive to improving the user experience.

[0071] In some embodiments, referring to Figure 4 , the balloon 212 is provided in plurality, and the plurality of balloons 212 are connected in parallel or in series.

[0072] The plurality of balloons 212 connected in parallel or in series can mean that the plurality of balloons 212 in the perfusion pipeline 23 are connected in series with each other, or can mean that the plurality of balloons 212 in the perfusion pipeline 23 are connected in parallel with each other so that the plurality of balloons 212 can increase the space for containing the perfusion liquid.

[0073] Exemplarily, the balloon 212 can be made of polyether block amide, thermoplastic polyurethane elastomer, polyethylene, thermoplastic elastomer, polyvinyl chloride, polytetrafluoroethylene, fluorinated ethylene propylene copolymer, synthetic latex (polyisoprene), silicone or natural latex, so that the safe expansion volume coefficient of the balloon 212 can be 2-8 times of the original initial state.

[0074] In some embodiments, the interventional pump flow conduit further comprises a protection member 5, and the protection member 5 is formed with a containing cavity, and the balloon 212 is arranged in the containing cavity.

[0075] The protection member 5 can be a device for protecting the balloon 212. The containing cavity can be a cavity structure in the protection member 5, and by arranging the balloon 212 in the containing cavity, the protection member 5 can limit the limit expansion volume of the balloon 212, so that the balloon 212 is not easy to burst under high pressure.

[0076] In some embodiments, the interventional pump flow conduit is configured as a blood pumping conduit or a thrombus suction conduit.

[0077] The interventional pump flow catheter is configured as a blood pump catheter, which means that the interventional pump flow catheter can be used as a product for assisting the delivery of blood in the human body. The interventional pump flow catheter is configured as a thrombus suction catheter, which means that the interventional pump flow catheter can be used as a product for suctioning and filtering thrombus in the blood in the human body, so as to remove the thrombus in the human body to the outside of the body. The application scenarios of the interventional pump flow catheter can be configured by the person skilled in the art according to the actual situation.

[0078] In some embodiments, the Shore hardness of the balloon 212 is set to C, 30D≤C≤70D, and the wall thickness of the balloon 212 is set to D, 0.05mm≤D≤0.35mm.

[0079] By setting the range of the Shore hardness C of the balloon 212 to 30D≤C≤70D and the range of the wall thickness D of the balloon 212 to 0.05mm≤D≤0.35mm, not only can the balloon 212 be inflated at a lower positive pressure, but also the balloon 212 has good structural strength and a longer service life.

[0080] Exemplarily, the range of the Shore hardness C of the balloon 212 can be set to 30D≤C≤45D, and the range of the wall thickness D of the balloon 212 is set to 0.05mm≤D≤0.2mm. Preferably, the Shore hardness C of the balloon 212 can be set to 30D, 35D, 40D or 45D, and the wall thickness D of the balloon 212 can be set to 0.05mm, 0.1mm, 0.15mm or 0.2mm. Not only can the elastic film 2112 be inflated at a lower positive pressure, but also the elastic film 2112 has good structural strength and a longer service life.

[0081] In some embodiments, the diameter E of the balloon 212 can be set to a range of 4mm≤E≤30mm.

[0082] In some embodiments, the protector 5 is configured as a light-proof structure.

[0083] The protector 5 is configured as a light-proof structure, which means that the protector 5 can shield strong light. By configuring the protector 5 as a light-proof structure, the balloon 212 is less likely to have adverse problems such as cracking and wrinkling under strong light.

[0084] In some embodiments, the protector 5 is configured as a transparent structure or a translucent structure.

[0085] By configuring the protector 5 as a transparent structure or a translucent structure, the user can conveniently observe the inflation and deflation state of the balloon 212 from the outside. Exemplarily, the protector 5 can be selected in a color system such as tea color, amber color, dark blue color, etc. with good light-proof effect to shield strong light and ultraviolet radiation.

[0086] Exemplarily, the perfusion pipeline 23 is further provided with a filter 26. The filter 26 can filter out bubbles and microorganisms from the perfusion liquid flowing therethrough. In some embodiments, referring to Figure 4 , the perfusion pipeline 23 is provided with two balloons 212, a pressure storage body 211 and a filter 26, and the perfusion one-way valve 22, the two balloons 212, the pressure storage body 211 and the filter 26 are sequentially arranged along the flow direction of the perfusion liquid in the perfusion pipeline 23. In other embodiments, the perfusion pipeline 23 is provided with two balloons 212, a pressure storage body 211 and a filter 26, and the perfusion one-way valve 22, the two balloons 212 and the filter 26 are sequentially arranged along the flow direction of the perfusion liquid in the perfusion pipeline 23. In still other embodiments, the perfusion pipeline 23 is provided with a balloon 212 and a filter 26, and the perfusion one-way valve 22, the balloon 212 and the filter 26 are sequentially arranged along the flow direction of the perfusion liquid in the perfusion pipeline 23. In yet other embodiments, the perfusion pipeline 23 is provided with a pressure storage body 211 and a filter 26, and the perfusion one-way valve 22, the pressure storage body 211 and the filter 26 are sequentially arranged along the flow direction of the perfusion liquid in the perfusion pipeline 23.

[0087] In some embodiments, the perfusion liquid discharge assembly further comprises a liquid discharge one-way valve 24 and a liquid discharge pipeline 25, the liquid discharge pipeline 25 is connected to the liquid pumping pump 11 to discharge the perfusion liquid in the liquid pumping pump 11, and the liquid discharge one-way valve 24 is arranged in the liquid discharge pipeline 25.

[0088] The liquid discharge pipeline 25 can be a pipeline in the perfusion liquid discharge assembly for discharging the perfusion liquid in the liquid pumping pump 11 in the fluid pipeline 1 to the outside to prevent the perfusion liquid waste from remaining in the human body. Exemplarily, the liquid discharge pipeline 25 can be connected to the perfusion pump 3 at one end extending out of the human body and connected to the fluid pipeline 1 at one end extending into the human body, so that the perfusion pump 3 can suck the perfusion liquid into the liquid discharge pipeline 25, the perfusion liquid in the liquid discharge pipeline 25 can be discharged along the liquid discharge pipeline 25 to the outside and flow back to the perfusion pump 3. In some embodiments, the liquid discharge pipeline 25 can also be connected to a waste liquid bag at one end extending out of the human body and connected to the fluid pipeline 1 at one end extending into the human body, so that the perfusion liquid waste can be discharged along the liquid discharge pipeline 25 to the outside and collected in the waste liquid bag.

[0089] The liquid discharge one-way valve 24 can be a valve arranged in the liquid discharge pipeline 25, which not only can be used to make the perfusion liquid waste in the liquid discharge pipeline 25 flow in a direction away from the liquid pumping pump 11, reducing the possibility of the perfusion liquid waste flowing back to the liquid pumping pump 11, but also can use its opening pressure to make the perfusion liquid in the inner cavity of the liquid pumping pump 11 have a certain pressure, which is conducive to reducing the possibility of blood flowing back to the liquid pumping pump 11.

[0090] Exemplarily, the drainage pipeline 25 can also be provided with the balloon 212, so that the inner cavity of the drainage pump 11 in the fluid pipeline 1 can better maintain the perfusion fluid with a certain pressure.

[0091] Some embodiments of the present application also provide an interventional pump flow catheter system, which is described with reference to Figure 5 The interventional pump flow catheter system comprises the interventional pump flow catheter, the perfusion pump 3 and the controller 4 provided in the above technical solutions, the controller 4 is electrically connected with the drainage pump 11 and the perfusion pump 3 through a cable, and the controller 4 is configured to control the operation of the drainage pump 11 and control the perfusion pump 3 to introduce the perfusion fluid into the perfusion pipeline 23.

[0092] In the present embodiment, the controller 4 can be a centralized or distributed controller 4, for example, the controller 4 can be a single microcontroller or be composed of multiple distributed microcontrollers, and the microcontroller can run a control program to control the temperature adjusting tube part and the temperature measuring tube part to realize their functions.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An interventional pump flow conduit, characterized by, The intervention pump flow catheter comprises: a fluid pipe, in which a liquid pumping pump is arranged; a perfusion and drainage assembly, which comprises a pressure storage member, a perfusion one-way valve and a perfusion pipeline, the perfusion pipeline being communicated with the liquid pumping pump, the perfusion one-way valve and the pressure storage member being arranged in the perfusion pipeline, the pressure storage member being located between the perfusion one-way valve and the liquid pumping pump, the pressure storage member comprising a pressure storage body, the pressure storage body comprising a seat body and an elastic membrane, the seat body being formed with a retraction wall surface and an expansion wall surface, the retraction wall surface and the expansion wall surface surrounding a pressure storage cavity, the elastic membrane being arranged in the pressure storage cavity, the elastic membrane being arranged to protrude towards the retraction wall surface in an initial state, the elastic membrane and the retraction wall surface surrounding a first cavity for storing a preset pressure perfusion liquid, the elastic membrane and the expansion wall surface surrounding a second cavity for providing a deformation space for the elastic membrane.

2. The interventional pump flow conduit of claim 1, wherein, The seat body is provided with a liquid inlet channel and a liquid outlet channel penetrating through the retraction wall surface, the liquid inlet channel being communicated with the perfusion one-way valve and the first cavity, and the liquid outlet channel being communicated with the liquid pumping pump and the first cavity.

3. The interventional pump flow conduit of claim 1, wherein, The seat body is formed with at least two pressure storage cavities, and the first cavities of the at least two pressure storage cavities are arranged in parallel.

4. The interventional pump flow conduit of claim 1, wherein, The retraction wall surface and the expansion wall surface are both configured as arc surfaces.

5. The interventional pump flow conduit of claim 1, wherein, The Shore hardness of the elastic membrane is set as A, 30D≤A≤70D, and the thickness of the elastic membrane is set as B, 0.05mm≤B≤0.35mm.

6. The interventional pump flow conduit of claim 1, wherein, The pressure storage member further comprises a balloon, which is connected in series or in parallel with the pressure storage body.

7. The interventional pump flow conduit of claim 6, wherein, The intervention pump flow catheter further comprises a protection member, which is formed with a containing cavity, and the balloon is arranged in the containing cavity.

8. The interventional pump flow conduit of claim 6, wherein, The intervention pump flow catheter is configured as a blood pumping catheter or a thrombus suction catheter.

9. The interventional pump flow conduit of claim 1, wherein, The perfusion and drainage assembly further comprises a drainage one-way valve and a drainage pipeline, the drainage pipeline being communicated with the liquid pumping pump to drain the perfusion liquid of the liquid pumping pump, and the drainage one-way valve being arranged in the drainage pipeline.

10. An interventional pump flow conduit system, characterized by The intervention pump flow catheter according to any one of claims 1 to 9; a perfusion pump, which is communicated with the perfusion pipeline; a controller, which is electrically connected with the liquid pumping pump and the perfusion pump, and is configured to control the operation of the liquid pumping pump and the perfusion of the perfusion pump into the perfusion pipeline. ​

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