A heart circulation pump and blood pump system

Abstract

The application discloses a heart circulation pump and a blood pump system. The heart circulation pump comprises a power transmission part, a rotating part, a mesh tube and a flow guide pipe. The power transmission part is used for being connected with a driving part to transmit power. The rotating part is sleeved on the power transmission part to rotate with the power transmission part. The mesh tube is sleeved on the outside of the rotating part to protect the rotating part. The flow guide pipe is sleeved on the outside of the mesh tube and has a blood inlet and a blood outlet. The power transmission part can drive the rotating part to rotate to drive the blood in the heart to flow into the flow guide pipe from the blood inlet of the flow guide pipe and flow out of the flow guide pipe from the blood outlet. The heart circulation pump can accelerate the circulation of the blood in the heart, thereby assisting in improving the blood supply function of the heart. In addition, the rotating blade is adjustable, the convenience of use is improved, and the mesh tube and the flow guide pipe improve the safety and the blood flow speed in use.

Description

Technical Field

[0001] This invention relates to a cardiac circulation pump, and also to a blood pump system including the cardiac circulation pump, belonging to the field of medical device technology. Background Technology

[0002] Heart dysfunction, or impaired cardiac function, is theoretically a broader concept. Heart failure (or simply heart failure) refers to heart dysfunction accompanied by clinical symptoms. Heart failure is a syndrome characterized by various structural or functional heart diseases that impair ventricular filling and / or ejection function, resulting in insufficient cardiac output to meet the metabolic needs of the body's tissues. Clinical manifestations include pulmonary and / or systemic congestion, and inadequate blood perfusion to organs and tissues, primarily presenting as dyspnea, limited physical activity, and fluid retention. Based on the speed of onset, heart failure can be clinically classified as acute or chronic. Based on the location of occurrence, it can be classified as left ventricular, right ventricular, or biventricular heart failure. There is also a distinction between systolic and diastolic heart failure.

[0003] According to the functional classification established by the New York Heart Association, heart disease patients can be classified into four categories. For patients in categories III and IV, with a left ventricular ejection fraction (LVEF) less than 35% and a QRS complex greater than 120 milliseconds, cardiac resynchronization therapy, implantation of a pacemaker, or cardiac surgery may be considered. These treatments can improve symptoms, enhance patients' quality of life, and have been shown to reduce mortality in some studies. Patients in categories II, III, and IV, as well as those with a LVEF less than 35%, may also benefit from implantable cardioverter-defibrillators (ICDs). This device has been shown to reduce mortality by approximately 23%.

[0004] Another treatment option is the use of a heart assist device, which is a battery-powered mechanical pump surgically implanted in the upper abdomen to pump blood from the ventricles into the aorta. Heart assist devices are becoming increasingly common, generally used for patients awaiting heart transplants. However, current heart assist devices suffer from problems such as excessive size and complex surgical placement. Summary of the Invention

[0005] The primary technical problem to be solved by this invention is to provide a cardiac circulation pump.

[0006] Another technical problem to be solved by the present invention is to provide a blood pump system.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] According to a first aspect of the present invention, a cardiac circulation pump is provided, disposed within the heart, for drawing blood from the heart into the aorta, comprising:

[0009] The power transmission unit is used to connect with the drive unit to transmit power;

[0010] A rotating component is fitted onto the power transmission unit so as to rotate with the power transmission unit.

[0011] A network tube is fitted onto the outside of the rotating component to provide safety protection for the rotating component;

[0012] A flow guide tube, sleeved on the outside of the mesh tube, has a blood inlet and a blood outlet;

[0013] The power transmission unit can drive the rotating component to rotate, so that blood in the heart enters the guide tube from the blood inlet and flows out of the guide tube from the blood outlet.

[0014] Preferably, the rotating component includes:

[0015] A rotating body is sleeved on the power transmission unit so as to rotate with the rotation of the power transmission unit;

[0016] Rotating blades are detachably disposed on the outside of the rotating body to adjust the opening angle of the rotating blades relative to the rotating body.

[0017] Preferably, the outer side of the rotating body is provided with multiple rotating shaft grooves, and the rotating blades, after heat treatment, are openably disposed in the rotating shaft grooves to adjust the opening angle of the rotating blades relative to the rotating body.

[0018] Preferably, the outer side of the rotating body is provided with multiple sets of rotating shaft grooves, and the multiple sets of rotating shaft grooves are arranged at intervals along the axial direction of the rotating body;

[0019] One set of rotating shaft grooves includes multiple rotating shaft grooves evenly distributed along the circumferential direction of the rotating body, and a set of rotating blades is installed on each set of rotating shaft grooves.

[0020] Preferably, the mesh tube is woven from multiple metal wires, and the middle section of each metal wire is bent into a trapezoidal shape so that both ends of the multiple metal wires are sleeved on the power transmission part, and the middle area of ​​the multiple metal wires forms a cylindrical cavity for accommodating the rotating part.

[0021] Alternatively, the mesh tube may be sculpted from a metal tube so that both ends of the mesh tube are fitted onto the power transmission unit, and the middle region of the mesh tube forms a cylindrical cavity for accommodating the rotating component.

[0022] Preferably, the guide tube includes a first acceleration section and a second acceleration section, which are spaced apart along the length of the guide tube to increase the flow rate of blood within the guide tube.

[0023] Preferably, the first acceleration section includes a first arc-shaped tube and a second arc-shaped tube with gradually changing diameters, both of which are bent toward the axis of the guide tube; the diameter of the first arc-shaped tube gradually decreases, and the diameter of the second arc-shaped tube gradually increases; the bending radius of the first arc-shaped tube and the bending radius of the second arc-shaped tube have a first predetermined ratio.

[0024] Preferably, the second acceleration section includes a third arc-shaped tube and a fourth arc-shaped tube with gradually changing diameters, both of which are bent toward the axis of the guide tube; the diameter of the third arc-shaped tube gradually decreases, and the diameter of the fourth arc-shaped tube gradually increases; the bending radius of the third arc-shaped tube and the bending radius of the fourth arc-shaped tube have a second predetermined ratio.

[0025] Preferably, the power transmission section includes at least a heart transmission segment and a power cable;

[0026] The cardiac transmission segment passes through the rotating component and is fixed relative to the rotating component;

[0027] The power cable is threaded through the heart transmission section and is detachably connected to the heart transmission section to drive the rotating component to rotate when connected.

[0028] According to a second aspect of the present invention, a blood pump system is provided, including the aforementioned cardiac circulation pump.

[0029] Compared with the prior art, the present invention has the following technical features:

[0030] 1. By accelerating the circulation of blood within the heart through a cardiac circulation pump, the heart's blood supply function can be improved.

[0031] 2. The rotating vanes of the cardiac circulation pump are adjustable. During use, the circulation device can be inserted into the body through a simple interventional procedure in its fully retracted state (when its size is smaller). Then, it can be opened to a semi-open state and a fully open state inside the body to improve blood flow, thus improving the convenience of use.

[0032] 3. Rotating parts are protected by a mesh tube made of woven metal wires, which improves the safety of use.

[0033] 4. By setting up a flow tube, blood can be accelerated in two ways to increase blood flow speed, thereby helping to improve the heart's blood supply function. Attached Figure Description

[0034] Figure 1 This is a diagram illustrating the actual application scenario of the cardiac circulation pump in an embodiment of the present invention;

[0035] Figure 2(a) is a schematic diagram of the overall structure of a cardiac circulation pump provided in an embodiment of the present invention;

[0036] Figure 2(b) is an exploded structural diagram of a cardiac circulation pump provided in an embodiment of the present invention;

[0037] Figure 3 Figure 2(a) shows a schematic diagram of the rotating component.

[0038] Figure 4 A schematic diagram of the rotating blades of a rotating component at different opening angles;

[0039] Figure 5 Schematic diagrams of the structure of a cardiac circulation pump in different configurations;

[0040] Figure 6 This is a schematic diagram of the network management system.

[0041] Figure 7 This is a schematic diagram of the flow guide tube.

[0042] Figure 8 This is an exploded structural diagram of a power transmission unit;

[0043] Figure 9 This is an exploded structural diagram of another type of power transmission unit. Detailed Implementation

[0044] The technical content of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0045] The cardiac circulation pump provided in this embodiment of the invention is installed inside the heart (e.g., Figure 1 As shown in the figure, in this embodiment, it is set in the left ventricle to draw blood from the heart into the aorta.

[0046] As shown in Figures 2(a) and 2(b), in one embodiment of the present invention, the cardiac circulation pump includes a rotating component 1, a mesh tube 2, a flow guide tube 3, and a power transmission unit 4. The power transmission unit 4 is connected to a drive unit (e.g., a rotary motor), thereby driving the power transmission unit 4 to rotate. The rotating component 1 is fitted onto the power transmission unit 4 to rotate with it. Furthermore, the end of the rotating component 1 away from the aortic circulation pump 2 is provided with a pigtail elbow connecting section 10 for connection to a pigtail elbow. The mesh tube 2 is fitted onto the outside of the rotating component 1, thereby providing safety protection for the rotating component 1 and improving the safety of the cardiac circulation pump. The flow guide tube 3 is fitted onto the outside of the mesh tube 2 for guiding blood (specifically, from the heart to the aorta).

[0047] like Figure 3 As shown, in one embodiment of the present invention, the rotating component 1 includes a rotating body 11 and a rotating blade 12. The rotating body 11 is sleeved on the power transmission part 4 and fixed relative to the power transmission part 4 (e.g., by key fit or interference fit), so that the rotating body 11 is driven to rotate by the rotation of the power transmission part 4. Correspondingly, the rotating blade 12 is disposed on the outer side of the rotating body 11. In this embodiment, a plurality of rotating shaft grooves 111 are formed on the outer side of the rotating body 11. After heat treatment, the rotating blade 12 is openably disposed in the rotating shaft grooves 111, thereby allowing adjustment of the opening angle of the rotating blade 12 relative to the rotating body 11. (Refer to...) Figure 4 As shown, the rotating blade 12 is opened to 0°, 45°, and 90° respectively, thus giving the blood pump system three operating modes (e.g., Figure 5 As shown, the system is available in three configurations: fully retracted, partially open, and fully open, to accommodate different usage scenarios. In use, the blood pump system can be inserted into the body via a simple interventional procedure in its fully retracted state (where it is smaller). It can then be opened internally to either the partially open or fully open state to improve blood flow.

[0048] Furthermore, in one embodiment of the present invention, two sets of rotating shaft grooves are symmetrically formed on the outer side of the rotating body 11 along the axial direction of the rotating body 11. Each set of rotating shaft grooves has three grooves, and the included angle between two adjacent rotating shaft grooves 111 is 120°. Correspondingly, a set of rotating blades is installed on each set of rotating shaft grooves, so that the outer side of the rotating body 11 has two sets of a total of 6 rotating blades 12 to improve the rotational suction of the rotating component 1.

[0049] The network tube 2 is fitted onto the outside of the rotating component 1, thereby providing safety protection for the rotating component 1 and improving the safety of the heart circulation pump 1. Specifically, as follows... Figure 6As shown, in this embodiment, the mesh tube 2 is woven from multiple metal wires 21. The metal wires can be ordinary metals or alloys. After weaving, the middle section of each metal wire is bent into a trapezoidal shape, so that both ends of the multiple metal wires are sleeved on the power transmission part 4, and the middle area of ​​the multiple metal wires forms a cylindrical cavity to accommodate the rotating part 1 and protect the rotating part 1.

[0050] It is understood that in another embodiment, the mesh tube 2 can also be sculpted from a metal tube so that both ends of the mesh tube 2 are fitted onto the power transmission part, and the middle area of ​​the mesh tube 2 forms a cylindrical cavity for accommodating the rotating part 1.

[0051] The drainage tube 3 is sleeved on the outside of the network tube 2 and has a blood inlet 31 and a blood outlet 32. The blood inlet 31 is close to the heart, and the blood outlet 32 ​​is close to the aorta, to guide blood from the heart into the drainage tube 3 from the blood inlet 31 and flow from the blood outlet 32 ​​to the aorta. Specifically, as... Figure 7 As shown, in this embodiment, the flow guide tube 3 has a first acceleration section 33 and a second acceleration section 34. The first acceleration section 33 is a Coanda effect tube, which specifically includes a first arc-shaped tube 331 and a second arc-shaped tube 332 with gradually changing diameters. Both the first arc-shaped tube 331 and the second arc-shaped tube 332 are bent in the direction of the axis of the flow guide tube 3. The diameter of the first arc-shaped tube 331 decreases from large to small, and the diameter of the second arc-shaped tube 332 increases from small to large. At the same time, the bending radius of the first arc-shaped tube 331 and the bending radius of the second arc-shaped tube 332 have a first set ratio, so that the connection between the first arc-shaped tube 331 and the second arc-shaped tube 332 forms a Coanda effect area to accelerate the blood for the first time.

[0052] Furthermore, in one embodiment of the present invention, the second acceleration section 34 is a Venturi sonic nozzle structure. Specifically, the second acceleration section 34 includes a third arc-shaped tube 341 and a fourth arc-shaped tube 342. Similarly, both the third arc-shaped tube 341 and the fourth arc-shaped tube 342 are bent towards the axis of the guide tube 3; the diameter of the third arc-shaped tube 341 decreases from large to small, and the diameter of the fourth arc-shaped tube 342 increases from small to large; simultaneously, the bending radius of the third arc-shaped tube 341 and the bending radius of the fourth arc-shaped tube 342 have a second predetermined ratio, thereby forming a Venturi sonic nozzle action area at the connection between the third arc-shaped tube 341 and the fourth arc-shaped tube 342 to accelerate the blood a second time. Thus, the guide tube 3 can be used to double-accelerate the blood to increase the blood flow velocity, thereby assisting in improving the heart's blood supply function.

[0053] like Figure 8As shown, in one embodiment of the present invention, the power transmission unit 4 includes a cardiac transmission section 41 and a power cable 42. Specifically, the cardiac transmission section 41 passes through the rotating member 1 and is fixed relative to the rotating member; the power cable 42 passes through the cardiac transmission section 41 and is detachably connected to the cardiac transmission section 41 for driving the rotating member 1 to rotate in the connected state. It is understood that the power transmission unit 4 can also add other transmission sections as needed, for example: Figure 9 As shown, in another embodiment, the power transmission unit 4 further includes an aortic transmission section 43. The cardiac transmission section 41 can be connected independently to the power cable 42, allowing the cardiac circulation pump to be placed inside the heart and operate independently. The aortic transmission section 43 can also be connected independently to the power cable 42, allowing the aortic circulation pump (the specific structure can be selected as needed) to be placed inside the aorta and operate independently. Furthermore, the cardiac transmission section 41 can be connected to the power cable 42, and then connected to the power cable 42 via the aortic transmission section 43, allowing the cardiac circulation pump to be placed inside the heart and the aortic circulation pump to be placed inside the aorta, enabling both pumps to operate simultaneously. This allows the cardiac circulation pump and the aortic circulation pump to accelerate the circulation of blood within the heart and aorta, respectively, thereby assisting in improving the heart's blood supply function.

[0054] Based on the above embodiments, this invention also provides a blood pump system, including the aforementioned cardiac circulation pump.

[0055] The cardiac circulation pump and blood pump system provided by this invention have been described in detail above. Any obvious modifications made by those skilled in the art without departing from the essence of this invention will constitute an infringement of the patent rights of this invention and will incur corresponding legal liability.

Claims

1. A cardiac circulation pump, disposed within the heart, for drawing blood from the heart into the aorta, characterized in that... The heart circulation pump comprises: a power transmission part connected with the driving part to transmit power; a rotating part sleeved on the power transmission part to rotate with the power transmission part; a mesh sleeve sleeved on the outside of the rotating part to protect the rotating part; a flow guide pipe sleeved on the outside of the mesh sleeve and having a blood inlet and a blood outlet; the flow guide pipe comprises a first accelerating section and a second accelerating section, the first accelerating section and the second accelerating section are arranged at intervals along the length direction of the flow guide pipe, the first accelerating section is a Coanda effect area, and the second accelerating section is a Venturi sonic nozzle area; the first accelerating section comprises a first arc-shaped pipe and a second arc-shaped pipe with gradually changed diameters, the first arc-shaped pipe and the second arc-shaped pipe are both curved towards the axis direction of the flow guide pipe, the diameter of the first arc-shaped pipe gradually decreases, the diameter of the second arc-shaped pipe gradually increases, and the bending radius of the first arc-shaped pipe has a first set ratio with the bending radius of the second arc-shaped pipe; the second accelerating section comprises a third arc-shaped pipe and a fourth arc-shaped pipe with gradually changed diameters, the third arc-shaped pipe and the fourth arc-shaped pipe are both curved towards the axis direction of the flow guide pipe, the diameter of the third arc-shaped pipe gradually decreases, the diameter of the fourth arc-shaped pipe gradually increases, and the bending radius of the third arc-shaped pipe has a second set ratio with the bending radius of the fourth arc-shaped pipe; wherein the power transmission part can drive the rotating part to rotate to drive the blood in the heart to enter the flow guide pipe from the blood inlet of the flow guide pipe, and the blood is accelerated twice by the first accelerating section and the second accelerating section and then flows out of the flow guide pipe from the blood outlet.

2. The cardiac circulatory pump of claim 1, wherein The rotating part comprises: a rotating body sleeved on the power transmission part to rotate with the power transmission part; a rotating blade arranged on the outside of the rotating body to adjust the opening angle of the rotating blade relative to the rotating body.

3. The heart circulation pump of claim 2, wherein: a plurality of rotating shaft grooves are formed on the outside of the rotating body, and the rotating blade is arranged in the rotating shaft groove after heat treatment to adjust the opening angle of the rotating blade relative to the rotating body.

4. The heart circulation pump of claim 3, wherein: a plurality of groups of rotating shaft grooves are formed on the outside of the rotating body and arranged at intervals along the axial direction of the rotating body; each group of rotating shaft grooves comprises a plurality of rotating shaft grooves uniformly distributed along the circumferential direction of the rotating body, and each group of rotating shaft grooves is provided with a group of rotating blades.

5. The heart circulation pump of claim 1, wherein: the mesh sleeve is woven by a plurality of metal wires, the middle section of each metal wire is bent into a trapezoidal shape, so that the two ends of the plurality of metal wires are sleeved on the power transmission part, and the middle region of the plurality of metal wires forms a cylindrical cavity for accommodating the rotating part. Alternatively, the mesh tube is carved from a metal tube, so that both ends of the mesh tube are sleeved on the power transmission part, and the middle region of the mesh tube forms a cylindrical cavity for accommodating the rotating member.

6. A blood pump system characterized by The heart circulation pump according to any one of claims 1-5.

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