Blood pump and ventricular assist system

Abstract

The application provides a blood pump, comprising a pump shell and a pipe assembly, the pump shell is provided with a receiving cavity; the pipe assembly is installed on the pump shell, the pipe assembly is provided with a liquid inlet, the liquid inlet is communicated with the receiving cavity, the pipe assembly further comprises a flow guide structure and a liquid outlet pipe communicated with the receiving cavity, the flow guide structure extends from the outer circumferential surface of the liquid outlet pipe towards the liquid inlet. The blood pump provided by the application comprises a pump shell and a pipe assembly, the liquid inlet and the liquid outlet pipe of the pipe assembly are both communicated with the receiving cavity, the pipe assembly comprises a flow guide structure, the flow guide structure extends from the outer circumferential surface of the liquid outlet pipe towards the liquid inlet, the external liquid is smoothly guided to the liquid inlet, the probability of thrombosis caused by the blood staying in the area between the outer circumferential surface of the pipe assembly and the inner surface of the ventricular wall when flowing to the liquid inlet is reduced, the blood injury caused by the collision between the blood and the pipe assembly when flowing to the liquid inlet is reduced, and the safety performance of the blood pump in the blood pumping process is improved. The application further provides a ventricular assist system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a blood pump and a ventricular assist system. BACKGROUND

[0002] The blood pump is a device connected between the ventricle and the blood vessel, used to assist patients with severe ventricular dysfunction or heart failure to provide a certain blood flow and blood pressure. The conventional blood pump is easy to cause blood damage and thrombosis when the blood enters the blood pump. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a blood pump and a ventricular assist system which reduces the probability of thrombosis and reduces blood damage caused by collision of blood with the tube assembly when flowing to the liquid inlet. The embodiments of the present application achieve the above-mentioned purpose through the following technical solutions.

[0004] In a first aspect, the present application provides a blood pump, comprising a pump shell and a tube assembly, the pump shell is provided with a receiving cavity; the tube assembly is installed on the pump shell, the tube assembly is provided with a liquid inlet, the liquid inlet is in communication with the receiving cavity, the tube assembly further comprises a flow guide structure and a liquid outlet pipe in communication with the receiving cavity, the flow guide structure extends from the outer peripheral surface of the liquid outlet pipe towards the liquid inlet.

[0005] In an embodiment, the flow guide structure comprises a flow guide surface, the flow guide surface extends from the outer peripheral surface of the liquid outlet pipe towards the liquid inlet, and the included angle between the flow guide surface and the axis of the tube assembly is 30-50°.

[0006] In an embodiment, the flow guide structure further comprises a drainage surface, the drainage surface is connected to the flow guide surface, and the drainage surface is connected between the outer peripheral surface of the liquid outlet pipe and the outer peripheral surface of the tube assembly.

[0007] In an embodiment, the drainage surface and the flow guide surface are smoothly transitioned; and / or, a fillet is arranged at the connection between the drainage surface and the outer peripheral surface of the liquid outlet pipe.

[0008] In an embodiment, the flow guide structure further comprises a flow-through plane, the flow-through plane is connected to the flow guide surface, the flow-through plane is parallel to the axis of the tube assembly, and the flow-through plane and the flow guide surface are smoothly transitioned.

[0009] In an embodiment, the tube assembly further comprises a liquid inlet pipe, the flow guide structure is connected between the liquid inlet pipe and the liquid outlet pipe, and the axis of the liquid inlet pipe is parallel to the axis of the liquid outlet pipe.

[0010] In an embodiment, the liquid inlet pipe is sleeved on the liquid outlet pipe, the flow guide structure and the inner circumferential surface of the liquid inlet pipe form the liquid inlet.

[0011] In an embodiment, the liquid outlet pipe is arranged in the liquid inlet pipe in a biased manner; and / or, the end of the liquid inlet pipe away from the pump shell is provided with a rounded corner; and / or, the end of the liquid outlet pipe away from the pump shell is provided with a rounded corner.

[0012] In an embodiment, the flow guide structure comprises a flow guide surface extending from the outer circumferential surface of the liquid outlet pipe towards the liquid inlet, and the junction between the flow guide surface and the outer circumferential surface of the liquid outlet pipe is provided with a rounded corner; and / or, the junction between the flow guide surface and the inner circumferential surface of the liquid inlet pipe is provided with a rounded corner.

[0013] In an embodiment, the flow guide structure extends from the end of the liquid inlet pipe away from the pump shell to the liquid inlet.

[0014] In an embodiment, the blood pump further comprises a flow passage, the liquid inlet is in communication with the accommodation cavity via the flow passage, and the opening of the flow passage towards the tube assembly is matched with the liquid inlet.

[0015] In an embodiment, the cross-sectional area of the flow passage gradually decreases from the opening of the flow passage towards the tube assembly to the direction of the opening of the flow passage away from the tube assembly.

[0016] In an embodiment, the tube assembly further comprises a liquid outlet pipe, the liquid outlet pipe is provided with a liquid outlet, the tube assembly can be inserted into a first organ, when the tube assembly is inserted into the first organ, the liquid inlet is located in the first organ and is in communication with the first organ, the liquid outlet pipe has a length such that when the tube assembly is inserted into the first organ, the tube assembly can extend to a second organ in communication with the first organ through the inside of the first organ, and the liquid outlet is in communication with the second organ.

[0017] In a second aspect, the application further provides a ventricular assist system comprising the blood pump of any of the above embodiments.

[0018] Compared with the prior art, the blood pump and the ventricular assist system provided by the application have the following advantages. The blood pump comprises a pump shell and a tube assembly, the liquid inlet and the liquid outlet pipe of the tube assembly are both in communication with an accommodation cavity, the tube assembly comprises a flow guide structure, and the flow guide structure extends from the outer circumferential surface of the liquid outlet pipe towards the liquid inlet, thereby achieving smooth guidance of external liquid to the liquid inlet, reducing the probability of thrombosis caused by the residence of blood in the area between the outer circumferential surface of the tube assembly and the inner surface of the ventricular wall when the blood flows to the liquid inlet, and reducing the blood injury caused by the collision of blood with the tube assembly when the blood flows to the liquid inlet, thereby improving the safety performance of the blood pump and the ventricular assist system during blood pumping.

[0019] These aspects or other aspects of the present application will be made clearer in the following description of embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0021] Figure 1 is a structural schematic diagram of a blood pump provided by the present application.

[0022] Figure 2 is Figure 1 is a partial exploded view of the blood pump (excluding the driving motor).

[0023] Figure 3 is Figure 2 is an exploded view of the blood pump.

[0024] Figure 4 is Figure 1 is a structural schematic diagram of the tube assembly of the blood pump from another viewing angle.

[0025] Figure 5 is Figure 4 is a sectional view along the A-A direction.

[0026] Figure 6 is Figure 1 is a structural schematic diagram of the tube assembly of the blood pump from another viewing angle.

[0027] Figure 7 is Figure 1 is a structural schematic diagram of the tube assembly of the blood pump from another viewing angle.

[0028] Figure 8 is Figure 1 is a structural schematic diagram of the tube assembly of the blood pump from another viewing angle.

[0029] The above drawings include the following reference signs:

[0030] Blood pump-10, pump shell-11, accommodation cavity-112, first shell-114, second shell-115, liquid inlet through hole-117, liquid outlet through hole-119, tube assembly-13, liquid inlet tube-132, liquid inlet-1321, liquid outlet tube-134, liquid outlet-1341, flow guide structure-136, flow guide surface-1362, drainage surface-1364, overflow plane-1366, tube shell-15, first tube body-152, second tube body-154, overflow channel-156, adapter assembly-17, first adapter-171, first adapter-1711, second adapter-1712, second adapter-173, drive motor-19; DETAILED DESCRIPTION

[0031] For the purpose of facilitating the understanding of the embodiments of the present application, the embodiments of the present application will be described in more detail below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the embodiments of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0033] In this document, the term "proximal" is defined as the end closer to the medical staff; the term "distal" is defined as the end farther away from the medical staff.

[0034] A blood pump is a device connected between a heart chamber and a blood vessel, used to assist patients with severe ventricular dysfunction or heart failure to provide a certain blood flow and blood pressure. The present inventors have found that for conventional blood pumps, blood lingers between the outer peripheral surface of the liquid inlet tube and the inner surface of the heart chamber wall when entering the blood pump, which is prone to form thrombus, and the blood entering the blood pump also directly collides with the tube assembly of the blood pump, which is prone to cause damage to the blood.

[0035] To improve at least some of the above problems, the embodiments of the present application provide a blood pump and a ventricular assist system, which reduces the damage to blood caused by the collision of blood with the tube assembly when flowing to the liquid inlet, and improves the safety performance of the blood pump and the ventricular assist system during blood pumping. The blood pump and the ventricular assist system provided by the present application will be described in detail below in combination with specific embodiments and the accompanying drawings.

[0036] Please refer to Figures 1 to 3The application provides a blood pump 10, which comprises a pump shell 11 and a pipe assembly 13, the pump shell 11 is provided with a receiving cavity 112; the pipe assembly 13 is installed on the pump shell 11, the pipe assembly 13 is provided with a liquid inlet 1321, the liquid inlet 1321 is communicated with the receiving cavity 112, the pipe assembly 13 further comprises a flow guide structure 136 and a liquid outlet pipe 134 communicated with the receiving cavity 112, the flow guide structure 136 extends from the outer circumferential surface of the liquid outlet pipe 134 towards the liquid inlet 1321, so as to guide the liquid (such as blood) to the liquid inlet 1321.

[0037] Since the pipe assembly 13 comprises the flow guide structure 136, and the flow guide structure 136 extends from the outer circumferential surface of the liquid outlet pipe 134 towards the liquid inlet 1321, the external blood can be smoothly guided to the liquid inlet 1321, the probability of thrombosis caused by the blood staying in the area between the outer circumferential surface of the pipe assembly 13 and the inner surface of the ventricular wall when flowing to the liquid inlet 1321 is reduced, the blood injury caused by the collision between the blood and the pipe assembly 13 when flowing to the liquid inlet 1321 is reduced, and the safety performance of the blood pump 10 in the blood pumping process is improved.

[0038] Please refer to Figure 2 and Figure 3 , specifically, the pump shell 11 is roughly in the shape of a volute. The pump shell 11 comprises a first shell 114 and a second shell 115, the first shell 114 is arranged on the second shell 115, and the first shell 114 and the second shell 115 cooperate to form the receiving cavity 112 for accommodating an impeller. The first shell 114 and the second shell 115 are roughly in the shape of a volute, and the second shell 115 can be connected with the shell of a motor.

[0039] The pump shell 11 is further provided with a liquid inlet through hole 117 and a liquid outlet through hole 119, both of which are communicated with the receiving cavity 112, and the liquid inlet through hole 117 is arranged on the first shell 114 and can be communicated with the liquid inlet 1321. In the embodiment, the liquid outlet through hole 119 is formed by the cooperation of the first shell 114 and the second shell 115, and the liquid outlet through hole 119 can be communicated with the liquid outlet pipe 134. In other embodiments, the liquid outlet through hole 119 can also be arranged on the first shell 114 or the second shell 115 only, and the specific position of the liquid outlet through hole 119 can be set according to the actual situation.

[0040] Please refer to Figure 1 , Figure 4 and Figure 5The tube assembly 13 is mounted to the pump housing 11 and is used for the inlet and outlet of the blood pump 10, i.e. the blood in the heart chamber can enter the blood pump 10 through the inlet port 1321 of the tube assembly 13 and flow out of the blood pump 10 through the outlet tube 134 of the tube assembly 13 to enter the aorta. The tube assembly 13 can be directly connected to the pump housing 11 or indirectly connected to the pump housing 11 through other structures, and the connection mode is not limited to bonding, welding and other processes.

[0041] In the embodiment, the tube assembly 13 further comprises an inlet tube 132, and the flow guide structure 136 is connected between the inlet tube 132 and the outlet tube 134. The axis of the inlet tube 132 is parallel to the axis of the outlet tube 134, so that the blood guided by the flow guide structure 136 can be directly opposite the inlet port 1321 of the inlet tube 132, thereby increasing the blood flow to the inlet port 1321 and increasing the blood pump flow.

[0042] In the embodiment, the inlet tube 132 is sleeved on the outlet tube 134, and the inlet tube 132 and the flow guide structure 136 surround the inlet port 1321. The inlet tube 132 can be provided through the heart chamber wall so that the inlet port 1321 is located in the heart chamber. In the embodiment, the inlet tube 132 is a hollow circular tube structure. In other embodiments, the inlet tube 132 can also be a hollow elliptical tube or other shaped tubular structure. In other embodiments, the inlet tube 132 can also be arranged side by side with the outlet tube 134, the inlet port 1321 is formed by the inlet tube 132 only, and the flow guide structure 136 is connected between the outer circumferential surface of the inlet tube 132 and the outer circumferential surface of the inlet tube 132. Similarly, the blood can be guided to the inlet port 1321.

[0043] Please refer to Figure 6 In the embodiment, the end of the inlet tube 132 away from the pump housing 11 is provided with a rounded corner, so that the end of the inlet tube 132 provided with the rounded corner can face the inside of the heart chamber, reducing the damage to the blood when entering the tube assembly 13. In other embodiments, the end of the inlet tube 132 away from the pump housing 11 can also not be provided with a rounded corner.

[0044] The outlet tube 134 is fixedly arranged inside the inlet tube 132, and the outlet tube 134 is provided with an outlet port 1341. In the embodiment, the outlet tube 134 is a hollow circular tube structure. In other embodiments, the outlet tube 134 can also be a hollow elliptical tube or other shaped tubular structure.

[0045] In the embodiment, the liquid outlet pipe 134 can be arranged in the liquid inlet pipe 132 in a bias manner, that is, the axis of the liquid outlet pipe 134 is parallel to the axis of the liquid inlet pipe 132 but not coincident with the axis of the liquid inlet pipe 132, so that the liquid outlet 1341 and the liquid inlet 1321 can be arranged as far as possible in a staggered manner. In this way, the blood can enter the accommodation cavity 112 from the liquid inlet 1321, and directly flow out from the liquid outlet 1341 after being affected by the impeller in the accommodation cavity 112. When the axis of the liquid outlet pipe 134 coincides with the axis of the liquid inlet pipe 132, the blood will be blocked by the inner wall of the pump shell 11 after being affected by the impeller, and then flow to the liquid outlet 1341 along the liquid outlet through hole 119, thereby reducing the blood flow. Therefore, the liquid outlet pipe 134 arranged in the liquid inlet pipe 132 in a bias manner can reduce the resistance of the blood to the inner wall of the pump shell 11, and increase the blood flow.

[0046] In the embodiment, the length of the liquid outlet pipe 134 is greater than the length of the liquid inlet pipe 132, so that when the liquid inlet pipe 132 is located in the ventricle, the liquid outlet pipe 134 can extend into the aorta, thereby achieving the pumping of the blood in the ventricle to the aorta. In addition, the length of the liquid outlet pipe 134 is greater than the length of the liquid inlet pipe 132, which reduces the blockage of the blood flow by the liquid inlet pipe 132, facilitates the blood flow into the liquid inlet pipe 132, and increases the blood flow of the blood pump 10. In other embodiments, the length of the liquid outlet pipe 134 can also be equal to the length of the liquid inlet pipe 132. For example, the liquid inlet pipe 132 and the liquid outlet pipe 134 can be extended into the aorta together, and an opening communicating with the liquid inlet 1321 can be arranged on the side of the liquid inlet pipe 132 close to the pump shell 11, so that the blood in the ventricle can enter the blood pump 10 from the liquid inlet 1321.

[0047] The end of the liquid outlet pipe 134 away from the pump shell 11 can be provided with a rounded corner to reduce the damage to the blood when the blood enters the pipe assembly 13. In other embodiments, the end of the liquid outlet pipe 134 away from the pump shell 11 can also not be provided with a rounded corner.

[0048] It should be noted that the radius of the rounded corner can be 0.1mm-0.5mm. When the radius of the rounded corner is less than 0.1mm, the improvement of hemolysis is not obvious, and when the radius of the rounded corner is greater than 0.5mm, the blood flow is hindered, which is easy to cause the blood flow to be too small.

[0049] The flow guide structure 136 is connected between the liquid outlet pipe 134 and the liquid inlet pipe 132, and the flow guide structure 136 is used to guide the blood to the liquid inlet 1321. In the embodiment, the flow guide structure 136, the liquid inlet pipe 132 and the liquid outlet pipe 134 are an integral structure, and the three can be formed by integral injection molding, 3D printing process or mechanical processing process. In other embodiments, the flow guide structure 136, the liquid inlet pipe 132 and the liquid outlet pipe 134 can also be independent structures, and the three can be connected by welding or bonding.

[0050] In the embodiment, the flow guide structure 136 can be a solid structure to increase the rigidity of the flow guide structure 136 and support the liquid inlet pipe 132 and the liquid outlet pipe 134, so as to reduce the deformation of the liquid inlet pipe 132 and the liquid outlet pipe 134. In other embodiments, the flow guide structure 136 can also be a hollow structure to reduce the weight of the pipe assembly 13, and the specific structure of the flow guide structure 136 can be set according to actual conditions.

[0051] Please refer to Figures 6 to 8 The flow guide structure 136 and the inner circumferential surface of the liquid inlet pipe 132 form the liquid inlet 1321, and the liquid inlet pipe 132 at least partially surrounds the flow guide structure 136, so that the blood guided by the flow guide structure 136 can flow to the liquid inlet 1321 under the wrapping action of the inner circumferential surface of the liquid inlet pipe 132, reducing the overflow of the blood, increasing the amount of blood entering from the liquid inlet 1321, and thus increasing the blood pump flow. In addition, due to the wrapping action of the inner circumferential surface of the liquid inlet pipe 132, the blood can flow more concentratedly to the liquid inlet 1321, increasing the blood pump pressure of the blood pump 10.

[0052] In the embodiment, the flow guide structure 136 extends from the end of the liquid inlet pipe 132 away from the pump shell 11 to the liquid inlet 1321, so that the external blood can be guided to the liquid inlet 1321 by the flow guide structure 136 when it contacts the end of the liquid inlet pipe 132 away from the pump shell 11, avoiding the residence of the blood at the end of the liquid inlet pipe 132 away from the pump shell 11, and further reducing the probability of thrombosis caused by the residence of the blood.

[0053] The flow guide structure 136 includes a flow guide surface 1362 extending from the outer circumferential surface of the liquid outlet pipe 134 towards the liquid inlet 1321, and the flow guide surface 1362 intersects the axis of the pipe assembly 13. In the embodiment, the flow guide surface 1362 is a plane, and the angle between the flow guide surface 1362 and the axis of the pipe assembly 13 is 30°-50°, so that the flow guide effect of the flow guide surface 1362 on the blood can be improved. More specifically, the angle between the flow guide surface 1362 and the axis of the pipe assembly 13 can be 45°. When the angle between the flow guide surface 1362 and the axis of the pipe assembly 13 is less than 30°, the improvement of the flow guide effect of the flow guide surface 1362 on the blood is not obvious. When the angle between the flow guide surface 1362 and the axis of the pipe assembly 13 is greater than 50°, the resistance of the blood to the flow guide surface 1362 increases significantly, which also affects the flow guide effect on the blood. The flow guide surface 1362 can also be a curved surface, for example, it can be a concave surface or a convex surface, as long as it can guide the liquid (such as blood) to the liquid inlet 1321 and improve the flow guide effect of the flow guide surface 1362 on the blood.

[0054] In the embodiment, the connection between the flow guide surface 1362 and the outer circumferential surface of the outflow tube 134 is provided with a round corner, and the connection between the flow guide surface 1362 and the inner circumferential surface of the inflow tube 132 is provided with a round corner, so that the blood can be guided, and the residence of the blood at the connection between the flow guide surface 1362 and the outer circumferential surface of the outflow tube 134 and the connection between the flow guide surface 1362 and the inner circumferential surface of the inflow tube 132 is reduced, and the formation of thrombus is reduced. The radius of the round corner can be 0.1 mm-0.5 mm. When the radius of the round corner is less than 0.1 mm, the improvement of the blood residence is not obvious, and when the radius of the round corner is greater than 0.5 mm, the outflow of the blood is hindered, and the blood flow is easily too small. In an embodiment, the connection between the flow guide surface 1362 and the outer circumferential surface of the outflow tube 134 is provided with a round corner, and the connection between the flow guide surface 1362 and the inner circumferential surface of the inflow tube 132 is not provided with a round corner. In another embodiment, the connection between the flow guide surface 1362 and the outer circumferential surface of the outflow tube 134 is not provided with a round corner, and the connection between the flow guide surface 1362 and the inner circumferential surface of the inflow tube 132 is provided with a round corner.

[0055] In other embodiments, the tube assembly 13 can also not include the inflow tube 132, for example, the flow guide structure 136 can be arranged around the outflow tube 134 and can be penetrated into the ventricular wall, and the inflow port 1321 can be arranged only on the flow guide structure 136. In the case that the tube assembly 13 does not include the inflow tube 132, the liquid can also be guided to the inflow port 1321, and the blood injury and thrombus formation caused by the collision of the blood with the tube assembly 13 when flowing to the inflow port 1321 are reduced.

[0056] In the embodiment, the flow guide structure 136 further includes a drainage surface 1364, the drainage surface 1364 is connected to the flow guide surface 1362, and the drainage surface 1364 is connected between the outer circumferential surface of the outflow port 134 tube and the outer circumferential surface of the tube assembly 13, so that part of the blood entering from the flow guide structure 136 can be guided to flow along the outer surface of the tube assembly 13, and the obstruction to the part of the blood is reduced. The drainage surface 1364 can be a smooth curved surface, and can also be a plane, as long as the purpose of guiding part of the blood to flow along the outer surface of the tube assembly 13 is met. In the flow direction of the blood entering the tube assembly 13, the width of the drainage surface 1364 gradually increases, so that the drainage surface 1364 is approximately triangular (as shown in Figure 8 , so as to minimize the resistance to the blood and improve the drainage effect.

[0057] In the embodiment, the drainage surface 1364 and the flow guide surface 1362 are smoothly transitioned to avoid the generation of sharp edges between the drainage surface 1364 and the flow guide surface 1362, and to reduce the hemolysis phenomenon. The connection between the drainage surface 1364 and the outer circumferential surface of the outflow tube 134 is provided with a round corner to avoid the generation of sharp edges between the drainage surface 1364 and the outer circumferential surface of the outflow tube 134, and to reduce the hemolysis phenomenon.

[0058] The flow guide structure 136 further comprises a flow passing plane 1366 connected to the flow guide plane 1362. The flow passing plane 1366 can surround the liquid inlet 1321 with the inner circumferential surface of the liquid inlet pipe 132. When the flow passing plane 1366 is also inclined relative to the axis of the pipe assembly 13, the size of the liquid inlet 1321 can be reduced without changing the length of the flow guide plane 1362. In the embodiment, the flow passing plane 1366 is parallel to the axis of the pipe assembly 13, which can increase the size of the liquid inlet 1321, thereby increasing the blood flow of the blood pump 10. In the embodiment, the flow passing plane 1366 and the flow guide plane 1362 are smoothly transitioned to avoid sharp edges between the flow passing plane 1366 and the flow guide plane 1362, thereby reducing hemolysis.

[0059] The pipe assembly 13 can be arranged in the first organ. When the pipe assembly 13 is arranged in the first organ, the liquid inlet 1321 is located in the first organ and communicates with the first organ. The liquid outlet pipe 134 has a length such that when the pipe assembly 13 is arranged in the first organ, the pipe assembly 13 can extend through the interior of the first organ to a second organ communicating with the first organ, and the liquid outlet 1341 communicates with the second organ. Therefore, the blood pump 10 does not need to be externally connected to an artificial pipeline, and the liquid can enter the accommodation cavity 112 through the liquid inlet 1321 and flow out through the liquid outlet 1341, thereby achieving pumping of the liquid in the first organ to the second organ. In this way, without opening a hole in the second organ, the disease caused by opening a hole in the second organ can be avoided while meeting the auxiliary blood pumping requirement. Since the blood pump 10 does not need to be externally connected to an artificial pipeline, the arrangement path of the artificial pipeline does not need to be combed, thereby reducing the difficulty of the operation.

[0060] In the embodiment, the first organ is the left ventricle, and the second organ is the aorta. The liquid outlet pipe 134 of the blood pump 10 has a length such that when the blood pump 10 is arranged in the left ventricle, the pump shell 11 is located outside the heart, the pipe assembly 13 is arranged in the ventricular wall, the liquid inlet 1321 is located in the left ventricle, and the liquid outlet pipe 134 extends through the ventricular valve to the aorta, so that the liquid outlet 1341 is located in the aorta. Therefore, the blood in the ventricle can be sucked into the accommodation cavity 112 through the liquid inlet 1321 under the action of the impeller and flow to the aorta through the liquid outlet 1341, thereby achieving pumping of the blood in the left ventricle to the aorta without the need for external connection to an artificial blood vessel.

[0061] In an embodiment, the first organ can also be a right ventricle, and the second organ can be a pulmonary artery, i.e., the blood pump 10 can also be used for the right ventricle, and can pump blood in the pulmonary artery to the right ventricle without the need for an external artificial blood vessel, avoiding the opening of the pulmonary artery, avoiding the pulmonary artery disease caused by the surgical opening of the pulmonary artery on the basis of assisting blood pumping, and without the need for combing the arrangement path of the artificial blood vessel, reducing the difficulty of the operation, and also eliminating the blood leakage problem caused by the clamping and switching of the artificial blood vessel. In addition, the blood pump 10 can also be applied to other tissues similar to the heart, as long as it can achieve the purpose of pumping the liquid in the first organ to the second organ.

[0062] Please continue to read Figures 1 to 3 In the present embodiment, the blood pump 10 is also provided with a flow passage 156, the liquid inlet 1321 communicates with the accommodation cavity 112 through the flow passage 156, and the opening of the flow passage 156 facing the tube assembly 13 is adapted to the liquid inlet 1321, wherein the adaptation means that the shape and size of the opening of the flow passage 156 facing the tube assembly 13 are substantially the same as those of the liquid inlet 1321, avoiding the fluctuation of blood flow caused by the sudden change of the shape or size of the opening of the flow passage 156 facing the tube assembly 13 during the flow of blood, so that the process of blood flowing to the accommodation cavity 112 is more stable and smooth. In the present embodiment, the opening of the flow passage 156 away from the tube assembly 13 can be adapted to the liquid inlet through hole 117 to further improve the stability and smoothness of the process of blood flowing to the accommodation cavity 112.

[0063] In the present embodiment, the cross-sectional area of the flow passage 156 gradually decreases from the opening of the flow passage 156 facing the tube assembly 13 to the opening of the flow passage 156 away from the tube assembly 13, so that the blood is gradually tightened along the flow direction, thereby accelerating the flow rate of the blood towards the accommodation cavity 112, weakening the adverse effects caused by factors such as gravity, and improving the flow rate and speed of blood pumping. In an embodiment, the width of the flow passage 156 decreases in a linear manner, and in another embodiment, the width of the flow passage 156 can also decrease in a non-linear manner, for example, in an exponential manner.

[0064] The blood pump 10 also includes a tube shell 15 connected to the pump shell 11 and communicating with the accommodation cavity 112, and the tube shell 15 also communicates with the liquid inlet 1321 of the tube assembly 13, so that the blood entering through the tube assembly 13 can enter the accommodation cavity 112 through the tube shell 15.

[0065] The tube shell 15 comprises a first tube body 152 and a second tube body 154 connected to each other, wherein the first tube body 152 covers the second tube body 154, and the second tube body 154 is connected to the pump shell 11. The second tube body 154 can form a cavity for accommodating the magnetic ring together with the pump shell 11, wherein the magnetic ring in the cavity can cooperate with the magnetic ring in the impeller, so that the impeller can be suspended in the accommodation cavity 112. The first tube body 152 and the second tube body 154 form a flow channel 156.

[0066] In other embodiments, the blood pump 10 can also not include the tube shell 15, for example, the length of the tube assembly 13 can be extended so that the tube assembly 13 is directly connected to the pump shell 11, or when the tube assembly 13 includes the inlet tube 132, the length of the inlet tube 132 can be extended, one end of the inlet tube 132 is connected to the pump shell 11, so that the inlet port 1321 communicates with the liquid inlet through hole 117, and the blood entering from the inlet port 1321 can also be guided into the accommodation cavity 112.

[0067] Please refer to Figure 1 and Figure 3 In the present embodiment, the blood pump 10 further comprises an adapter assembly 17 connected between the tube shell 15 and the tube assembly 13, and the adapter assembly 17 is also connected between the pump shell 11 and the tube assembly 13 to mount the tube assembly 13 to the pump shell 11. The adapter assembly 17 can be connected to the pump shell 11 by welding or one-piece forming, and the tube assembly 13 can be connected to the adapter assembly 17 by welding or bonding.

[0068] The surface of the adapter assembly 17 facing the tube assembly 13 is parallel to the surface of the tube assembly 13 facing the adapter assembly 17, which facilitates increasing the contact area between the adapter assembly 17 and the tube assembly 13, and facilitates sealing connection between the adapter assembly 17 and the tube assembly 13, thereby improving the problem of liquid leakage when the blood flows into the accommodation cavity 112 and flows out of the accommodation cavity 112, and increasing the blood flow and speed of the blood pump 10. In addition, the increase of the contact area between the adapter assembly 17 and the tube assembly 13 can also increase the connection strength between the adapter assembly 17 and the tube assembly 13, and reduce the probability of the tube assembly 13 falling off from the pump shell 11.

[0069] The adapter assembly 17 comprises a first adapter 171 and a second adapter 173. The first adapter 171 comprises a first adapter portion 1711 and a second adapter portion 1712. The first adapter portion 1711 is connected between the tube shell 15 and the tube assembly 13, specifically, the first adapter portion 1711 is connected between the first tube body 152 and the tube assembly 13, for example, the first adapter portion 1711 is integrally arranged with the first tube body 152 and is connected with the tube assembly 13 by welding or adhesion. The second adapter portion 1712 is connected between the pump shell 11 and the tube assembly 13, for example, the second adapter portion 1712 is integrally arranged with the pump shell 11 and is connected with the second tube body 154 by welding or adhesion. The second adapter 173 surrounds and connects the first adapter 171 to fix the first adapter portion 1711 and the second adapter portion 1712, so as to realize fixing the first adapter 171 as a whole structure. The outer diameter of the second adapter 173 can be the same as the outer diameter of the tube assembly 13, so as to increase the contact area between the adapter assembly 17 and the tube assembly 13 and improve the appearance consistency of the blood pump 10.

[0070] In the embodiment, the inner contour line of the first adapter 171 can be in adaptive contact with the outer contour line of the second adapter 173, that is, the length and shape of the inner contour line of the first adapter 171 and the outer contour line of the second adapter 173 are substantially the same. The first adapter 171 and the second adapter 173 can be point-glued, so as to further improve the liquid leakage problem of blood on the basis of realizing fixed connection of the first adapter 171 and the second adapter 173.

[0071] In other embodiments, the blood pump 10 can also not comprise the adapter assembly 17, that is, the tube assembly 13 can be directly mounted on the pump shell 11, and only the liquid inlet 1321 needs to be docked with the liquid inlet through hole 117 of the pump shell 11 and the liquid outlet 1341 needs to be docked with the liquid outlet through hole 119 of the pump shell 11.

[0072] The blood pump 10 further comprises an impeller (not shown in the figure) which is rotatably accommodated in the accommodation cavity 112 to convey the liquid entering the accommodation cavity 112 from the liquid inlet 1321 to the liquid outlet 1341. A rotor (not shown in the figure) can be arranged inside the impeller. The rotor can cooperate with a stator of the motor. When the stator drives the rotor to rotate in the accommodation cavity 112, the impeller also rotates synchronously with the rotor in the accommodation cavity 112. The specific structure of the impeller can refer to the prior art.

[0073] The blood pump 10 further comprises a driving motor 19 which is connected to the side of the pump shell 11 away from the tube shell 15. The driving motor 19 is in transmission cooperation with the impeller to drive the impeller to rotate. For example, the inside of the driving motor 19 comprises a stator which is magnetically cooperated with a rotor inside the impeller, so that the rotor rotates to drive the impeller to rotate.

[0074] In summary, the blood pump 10 provided by the application comprises a pump shell 11 and a pipe assembly 13, the pump shell 11 is provided with a receiving cavity 112; the pipe assembly 13 is provided with a liquid inlet 1321, the liquid inlet 1321 is communicated with the receiving cavity 112, the pipe assembly 13 further comprises a flow guide structure 136 and a liquid outlet pipe 134 communicated with the receiving cavity 112, and the flow guide structure 136 extends from the outer circumferential surface of the liquid outlet pipe 134 towards the liquid inlet 1321, so that the external liquid is smoothly guided to the liquid inlet 1321, the probability of thrombosis caused by the blood staying in the area between the outer circumferential surface of the pipe assembly 13 and the inner surface of the ventricular wall when flowing to the liquid inlet 1321 is reduced, and the blood injury caused by the collision between the blood and the pipe assembly 13 when flowing to the liquid inlet 1321 is reduced. In addition, since the pipe assembly 13 can be arranged in the ventricular wall, the liquid inlet 1321 is located in the first organ, and the liquid outlet 1341 is located in the second organ, so that the blood in the first organ can be pumped to the second organ without external artificial blood vessels, thereby avoiding diseases caused by surgical openings of the second organ, and since the blood pump 10 does not need to be connected with an artificial blood vessel, the arrangement path of the artificial blood vessel is not needed, the difficulty of the operation is reduced, and the problem of blood leakage caused by the connection of the artificial blood vessel is eliminated. That is, the blood pump 10 provided by the application can pump the blood in the first organ to the second organ without external artificial blood vessels, reduce the collision between the blood and the pipe assembly 13 when flowing to the liquid inlet 1321, and improve the safety performance of the blood pump 10 in the blood pumping process.

[0075] The application further provides a ventricular assist system (not shown in the figure) comprising the blood pump 10. The ventricular assist system can further comprise a ventricular connecting assembly (not shown in the figure) and a control console (not shown in the figure), etc., the ventricular connecting assembly can be used to install the blood pump 10 on the heart, and the control console can be electrically connected with the blood pump 10 to control the operation of the blood pump 10. The structures or devices such as the ventricular connecting assembly and the control console can refer to the prior art, and will not be limited here.

[0076] The ventricular assist system provided by the application comprises the blood pump 10, which can pump the blood in the ventricle to the aorta without external artificial blood vessels, reduce the probability of thrombosis caused by the blood staying in the area between the outer circumferential surface of the pipe assembly 13 and the inner surface of the ventricular wall when flowing to the liquid inlet 1321, and reduce the blood injury caused by the collision between the blood and the pipe assembly 13 when flowing to the liquid inlet 1321, thereby improving the safety performance of the blood pump 10 in the blood pumping process. Therefore, the ventricular assist system provided by the application can also pump the blood in the ventricle to the aorta without external artificial blood vessels, reduce the collision between the blood and the pipe assembly 13 when flowing to the liquid inlet 1321, and improve the safety performance of the ventricular assist system in the blood pumping process.

[0077] In the present application, the terms "first", "second" and the like are used only to distinguish different descriptions, and cannot be understood as specifically or particularly indicating or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0078] The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A blood pump, characterized in that, The blood pump comprises: a pump shell provided with a receiving cavity; and a tube assembly installed on the pump shell, the tube assembly is provided with a liquid inlet, the liquid inlet is communicated with the receiving cavity, the tube assembly further comprises a liquid inlet tube, a flow guide structure and a liquid outlet tube communicated with the receiving cavity, the liquid inlet tube is sleeved on the liquid outlet tube, the flow guide structure is connected between the liquid inlet tube and the liquid outlet tube, the flow guide structure and the inner circumferential surface of the liquid inlet tube form the liquid inlet, the flow guide structure extends from the outer circumferential surface of the liquid outlet tube towards the liquid inlet, the flow guide structure comprises a flow guide surface, the flow guide surface extends from the outer circumferential surface of the liquid outlet tube towards the liquid inlet, the flow guide structure further comprises a flow guide surface, the flow guide surface is connected with the flow guide surface, and the flow guide surface is connected between the outer circumferential surface of the liquid outlet tube and the outer circumferential surface of the tube assembly.

2. The blood pump of claim 1, wherein, The included angle between the flow guide surface and the axis of the tube assembly is 30°-50°.

3. The blood pump of claim 1, wherein, The flow guide surface and the flow guide surface are smoothly transitioned; and / or, the connection between the flow guide surface and the outer circumferential surface of the liquid outlet tube is provided with a rounded corner.

4. The blood pump of claim 1, wherein, The flow guide structure further comprises a flow passing plane, the flow passing plane is connected with the flow guide surface, the flow passing plane is parallel to the axis of the tube assembly, and the flow passing plane and the flow guide surface are smoothly transitioned.

5. The blood pump of claim 1, wherein, The axis of the liquid inlet tube is parallel to the axis of the liquid outlet tube.

6. The blood pump of claim 5, wherein, The liquid outlet tube is arranged in the liquid inlet tube; and / or, the end of the liquid inlet tube away from the pump shell is provided with a rounded corner; and / or, the end of the liquid outlet tube away from the pump shell is provided with a rounded corner.

7. The blood pump of claim 5, wherein, The connection between the flow guide surface and the outer circumferential surface of the liquid outlet tube is provided with a rounded corner, and the connection between the flow guide surface and the inner circumferential surface of the liquid inlet tube is provided with a rounded corner.

8. The blood pump of claim 1, wherein, The flow guide structure extends from the end of the liquid inlet tube away from the pump shell to the liquid inlet.

9. The blood pump of any of claims 1-8, wherein, The blood pump further comprises a flow passing channel, the liquid inlet is communicated with the receiving cavity through the flow passing channel, and the opening of the flow passing channel towards the tube assembly is matched with the liquid inlet.

10. The blood pump of claim 9, wherein, From the opening of the flow passing channel towards the tube assembly to the opening of the flow passing channel away from the tube assembly, the cross-sectional area of the flow passing channel gradually decreases.

11. The blood pump of any of claims 1-8, wherein, The liquid outlet tube is provided with a liquid outlet, the tube assembly can be arranged in a first organ, when the tube assembly is arranged in the first organ, the liquid inlet is located in the first organ and communicated with the first organ, the liquid outlet tube has a certain length, so that when the tube assembly is arranged in the first organ, the tube assembly can extend to a second organ communicated with the first organ through the inside of the first organ, and the liquid outlet is communicated with the second organ.

12. A ventricular assist system, characterized by The blood pump comprises: The blood pump of any one of claims 1-11.

Images