Perfusion cleaning device and percutaneous blood pumping device

Abstract

The present invention provides an infusion cleaning device and a percutaneous blood pumping device. The infusion cleaning device includes a rotating shaft assembly, an infusion tube, a housing, and an infusion chamber. The infusion chamber includes an outer infusion chamber, an inner infusion chamber, and a communication chamber. The gap between the housing and the infusion tube forms the outer infusion chamber to form an inflow passage for the infusion liquid. The gap between the infusion tube, the rotating shaft sleeve, and the rotating shaft forms the inner infusion chamber to form an outflow passage for the infusion liquid. The communication chamber is provided through the tube wall of the infusion tube and communicates the outer infusion chamber and the inner infusion chamber. With such a setting, the flow rate and flow volume of the infusion liquid in the infusion chamber can be adjusted, different infusion passages can be formed, different fluid dynamics can be obtained, the optimal fluid power efficiency and infusion efficiency can be obtained, and thus the infusion cleaning efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an infusion cleaning device and a percutaneous blood pumping device. Background Art

[0002] With the development of medical technology, the application of percutaneous blood pumping devices in clinical treatment has become the main choice for treating patients' diseases. For example, patients with heart failure are treated with ventricular assist devices, or patients with renal failure are treated with a catheter pump for assisting blood pumping. Relative movements between the flexible shaft and the shaft sleeve in the rotating shaft assembly of the percutaneous blood pumping device, and between the rigid impeller rotating shaft and the support member will generate abrasive particles. If the abrasive particle enters the human body, it will also form a thrombus, endangering human life and health. Moreover, since the rotating shaft assembly is inside the human body, the blood entering the rotating shaft assembly will coagulate on the structural members of the rotating shaft assembly to form a thrombus, causing problems such as an increase in the load on the rotating shaft assembly and transmission failure. Therefore, it is necessary to use an infusion cleaning device to perform perfusion cleaning on the rotating shaft assembly to prevent abrasive particles from entering the human body, thereby avoiding the formation of thrombi. It also prevents blood from coagulating on the rotating shaft assembly to form a thrombus. In the current infusion cleaning device, there is a gap between the impeller rotating shaft of the rotating shaft assembly and the sealing cover. The bearing on the rotating shaft is arranged on the proximal side of the sealing cover. The perfusion liquid flows in from the gap, enters the inner perfusion cavity from the distal end of the bearing, and then flows out of the body, thereby carrying out the abrasive particles generated by the bearing and the rotating shaft, and thus avoiding the formation of thrombi.

[0003] However, the perfusion liquid can only flow into the inner perfusion cavity from the inherent gap between the impeller rotating shaft and the sealing cover. Due to the narrow gap space, the adjustment margin of the gap space is small, almost non-adjustable, and the flow rate of the perfusion liquid is small. When a large amount of abrasive particles are generated in the rotating shaft assembly, especially when a large amount of abrasive particles are generated between the rotating shaft and the shaft sleeve, as the abrasive particles continue to deposit and accumulate, the perfusion liquid cannot carry out a large amount of deposited abrasive particles out of the body, resulting in a continuous decrease in the perfusion flushing efficiency. Moreover, due to the uniqueness of the gap, there is only one flow channel for the perfusion liquid to flow through. The single flow channel also makes the perfusion liquid prone to blockage, resulting in a decrease in the flushing efficiency.

[0004] Therefore, it is necessary to develop an infusion cleaning device with high perfusion flushing efficiency to solve at least the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an infusion cleaning device and a percutaneous blood pumping device to solve the problem of low current infusion cleaning efficiency.

[0006] To solve the above technical problems, the present invention provides an infusion cleaning device, comprising: a rotating shaft assembly, an infusion tube, a housing, and an infusion cavity; the rotating shaft assembly includes a rotating shaft and a rotating shaft sleeve, the rotating shaft sleeve is sleeved on the proximal end and the middle part of the rotating shaft, and there is a gap between the rotating shaft sleeve and the rotating shaft; the infusion tube is sleeved on the distal end of the rotating shaft, the infusion tube is axially connected to the rotating shaft sleeve along the axis of the rotating shaft, and there is a gap between the infusion tube and the rotating shaft; the housing is at least sleeved outside the infusion tube, and there is a gap between the housing and the infusion tube; the infusion cavity includes an outer infusion cavity, an inner infusion cavity, and a communication cavity; the gap between the housing and the infusion tube forms the outer infusion cavity to form an inflow path for the infusion liquid; the gap between the infusion tube, the rotating shaft sleeve and the rotating shaft forms the inner infusion cavity to form an outflow path for the infusion liquid; the communication cavity penetrates through the tube wall of the infusion tube and communicates the outer infusion cavity and the inner infusion cavity.

[0007] Optionally, the rotating shaft assembly further includes a support member, the support member is disposed on the rotating shaft and is located in the inner infusion cavity to support the rotation of the rotating shaft; there is a gap in the assembly between the support member and the rotating shaft, or the support member itself has a gap for the infusion liquid to flow through; the support member includes the first support member, in the axial direction of the rotating shaft, the axial position of the communication cavity is located on the proximal side of the axial position of the first support member.

[0008] Optionally, the support member further includes: at least one second support member, all the second support members are located on the proximal side of the first support member; the axial position of the communication cavity is located on the proximal side or the distal side of at least one of the second support members, or the axial position of the communication cavity is the same as the axial position of one of the second support members.

[0009] Optionally, the axial position of the communication cavity is located on the distal side of all the second support members,

[0010] Or, the axial position of the communication cavity is located on the proximal side of all the second support members.

[0011] Optionally, the support member further includes: at least two of the second support members, the axial position of the communication cavity is located between the axial positions of the two second support members.

[0012] Optionally, the communication cavity includes communication holes, and the number of the communication holes is at least one; when the number of the communication holes is two or more, the communication holes are arranged axially or circumferentially along the infusion tube.

[0013] Optionally, the axis of the communication hole is arranged at an acute angle to the axis of the infusion tube.

[0014] Optionally, the communication cavity is disposed around the perfusion tube.

[0015] Optionally, the perfusion and cleaning device further includes an input pump and an output pump; the input pump is communicated with the outer perfusion cavity to pump the perfusion liquid into the inflow passage; the output pump is communicated with the inner perfusion cavity to pump the perfusion liquid out of the outflow passage.

[0016] Optionally, the perfusion cavity includes a spiral cavity, and the spiral direction of the spiral cavity gradually approaches the proximal end along the rotation direction of the rotating shaft; the spiral cavity is disposed on the wall of the rotating shaft and / or on the inner wall of the perfusion tube.

[0017] Optionally, the rotating shaft assembly further includes the impeller, the impeller is connected to the end of the distal end of the rotating shaft, and there is a gap between the end of the proximal end of the impeller and the end of the distal end of the perfusion tube for the circulation of the perfusion liquid.

[0018] To solve the above technical problems, the present invention further provides a percutaneous blood pumping device, including: the perfusion and cleaning device as described above.

[0019] In a perfusion and cleaning device and a percutaneous blood pumping device provided by the present invention, the perfusion and cleaning device includes: a rotating shaft assembly, a perfusion tube, a housing, and a perfusion cavity; the rotating shaft assembly includes a rotating shaft and a rotating shaft sleeve, the rotating shaft sleeve is sleeved on the proximal end and the middle part of the rotating shaft, and there is a gap between the rotating shaft sleeve and the rotating shaft; the perfusion tube is sleeved on the distal end of the rotating shaft, the perfusion tube is axially connected to the rotating shaft sleeve along the axis of the rotating shaft, and there is a gap between the perfusion tube and the rotating shaft; the housing is at least sleeved outside the perfusion tube, and there is a gap between the housing and the perfusion tube; the perfusion cavity includes an outer perfusion cavity, an inner perfusion cavity, and a communication cavity; the gap between the housing and the perfusion tube forms the outer perfusion cavity to form an inflow passage for the perfusion liquid; the gap between the perfusion tube, the rotating shaft sleeve and the rotating shaft forms the inner perfusion cavity to form the outflow passage for the perfusion liquid; the communication cavity penetrates through the tube wall of the perfusion tube and communicates the outer perfusion cavity and the inner perfusion cavity. With such a setting, the flow rate and flow volume of the perfusion liquid in the perfusion cavity can be adjusted, different perfusion passages can be formed, different liquid dynamics can be obtained, the optimal liquid power efficiency and perfusion efficiency can be obtained, and thus the perfusion and cleaning efficiency can be improved. Description of the Drawings

[0020] Those of ordinary skill in the art will understand that the provided drawings are used to better understand the present invention and do not constitute any limitation to the scope of the present invention. Among them:

[0021] Figure 1Schematic diagram of a perfusion cleaning device according to an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of the perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0023] Figure 3 is Figure 2 Cross-sectional view of the perspective view of the perfusion cleaning device shown.

[0024] Figure 4 Schematic diagram of another perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0025] Figure 5 Schematic diagram of another perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0026] Figure 6 Schematic diagram of another perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0027] Figure 7 Schematic diagram of another perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0028] Figure 8 Schematic diagram of another perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0029] Figure 9 Cross-sectional view of the perspective view of the perfusion cleaning device shown.

[0030] Figure 10 Schematic diagram of the rotating shaft and the support member of the perfusion cleaning device according to an embodiment of the present invention.

[0031] Figure 11 Schematic diagram of another perfusion passage of the perfusion cleaning device according to an embodiment of the present invention.

[0032] Figure 12 is Figure 7 Cross-sectional view of the perspective view of the perfusion cleaning device shown.

[0033] In the drawings:

[0034] A - proximal end, B - distal end;

[0035] 100 - rotating shaft assembly, 110 - rotating shaft, 111 - flexible shaft, 112 - transmission shaft, 120 - rotating shaft sleeve, 130 - support member, 131 - first support member, 132 - second support member, 140 - impeller;

[0036] 200 - perfusion tube;

[0037] 300 - housing, 310 - liquid inlet.

[0038] 400 - perfusion cavity, 410 - outer perfusion cavity, 420 - inner perfusion cavity, 430 - communication cavity, 440 - spiral cavity. Specific embodiments

[0039] To make the objectives, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in very simplified forms and not drawn to scale, and are only used to conveniently and clearly assist in explaining the objectives of the embodiments of the present invention. In addition, the structures shown in the accompanying drawings are often part of the actual structures. In particular, the accompanying drawings need to show different emphases and sometimes use different scales.

[0040] As used in this specification, the singular forms "a", "an" and "the" include plural objects unless the context clearly indicates otherwise. As used in this specification, the term "or" is generally used in the sense of including "and / or" unless the context clearly indicates otherwise. The term "several" is generally used in the sense of including "at least one", and the term "at least two" is generally used in the sense of including "two or more". In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include one or at least two of such features. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. The "distal end" refers to the end far from the operation of the medical staff, and the "proximal end" refers to the end close to the operation of the medical staff. In addition, as used in the present invention, when an element is provided on another element, it generally only means that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements may be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, an element may be inside, outside, above, below or on one side of another element, etc., unless the context clearly indicates otherwise. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, some well-known technical features are not described to avoid confusing the present invention.

[0041] An embodiment of the present invention provides a perfusion cleaning device and a percutaneous blood pumping device. The perfusion cleaning device includes: a rotating shaft assembly, a perfusion tube, a housing, and a perfusion cavity; the rotating shaft assembly includes a rotating shaft and a rotating shaft sleeve, the rotating shaft sleeve is sleeved on the proximal end and the middle part of the rotating shaft, and there is a gap between the rotating shaft sleeve and the rotating shaft; the perfusion tube is sleeved on the distal end of the rotating shaft, the perfusion tube is axially connected to the rotating shaft sleeve along the axis of the rotating shaft, and there is a gap between the perfusion tube and the rotating shaft; the housing is at least sleeved outside the perfusion tube, and there is a gap between the housing and the perfusion tube; the perfusion cavity includes an outer perfusion cavity, an inner perfusion cavity, and a communication cavity; the gap between the housing and the perfusion tube forms the outer perfusion cavity to form an inflow passage for the perfusion liquid; the gaps between the perfusion tube, the rotating shaft sleeve and the rotating shaft form the inner perfusion cavity to form an outflow passage for the perfusion liquid; the communication cavity penetrates through the wall of the perfusion tube and communicates the outer perfusion cavity and the inner perfusion cavity. With such a setting, the flow rate and flow volume of the perfusion liquid in the perfusion cavity can be adjusted, different perfusion passages can be formed, different liquid dynamics can be obtained, the optimal liquid power efficiency and perfusion efficiency can be obtained, and thus the perfusion cleaning efficiency can be improved.

[0042] The following is a description with reference to the accompanying drawings.

[0043] Please refer to Figures 1 to 12 , Figure 1 which is a schematic diagram of a perfusion cleaning device according to an embodiment of the present invention; Figure 2 which is a schematic diagram of a perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 3 is Figure 2 a cross-sectional view of the three-dimensional diagram of the perfusion cleaning device shown in Figure 4 which is a schematic diagram of another perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 5 which is a schematic diagram of another perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 6 which is a schematic diagram of another perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 7 which is a schematic diagram of another perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 8 which is a schematic diagram of another perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 9 which is a cross-sectional view of the three-dimensional diagram of a perfusion cleaning device according to an embodiment of the present invention; Figure 10 which is a schematic diagram of the rotating shaft and the support member of a perfusion cleaning device according to an embodiment of the present invention; Figure 11 which is a schematic diagram of another perfusion passage of a perfusion cleaning device according to an embodiment of the present invention; Figure 12 is Figure 7 a cross-sectional view of the three-dimensional diagram of the perfusion cleaning device shown in

[0044] As Figures 1 to 12 shown, this embodiment provides an infusion and cleaning device. The infusion and cleaning device includes: a rotating shaft assembly 100, an infusion tube 200, a housing 300, and an infusion cavity 400.

[0045] The rotating shaft assembly 100 includes a rotating shaft 110 and a rotating shaft sleeve 120. The rotating shaft sleeve 120 is sleeved on the proximal end and the middle part of the rotating shaft 110, and there is a gap between the rotating shaft sleeve 120 and the rotating shaft 110. The proximal end of the rotating shaft 110 is a part of the proximal end and has a certain length; the middle part is also a part of the middle of the rotating shaft 110 and has a certain length. Preferably, the rotating shaft 110 includes a flexible shaft 111 and a transmission shaft 112. The flexible shaft 111 is arranged at the proximal end of the transmission shaft 112, and the two can be connected by welding, coupling, etc. The transmission shaft can be a rigid rotating shaft. Preferably, the rotating shaft sleeve 120 is sleeved on at least a part of the flexible shaft 111. A large amount of wear debris is generated by the relative movement between the rotating shaft 110 and the rotating shaft sleeve 120, and an infusion fluid is required to carry the wear debris out of the body to prevent the wear debris from entering the body and forming thrombus. The infusion tube 200 is sleeved on the distal end of the rotating shaft 110. The infusion tube 200 is axially connected to the rotating shaft sleeve 120 along the rotating shaft 110, and there is a gap between the infusion tube 200 and the rotating shaft 110. It should be understood that the rotating shaft is axially divided into a proximal end, a middle part, and a distal end in sequence. The infusion tube 200 is connected to the rotating shaft sleeve 120, and the connected structure can include the entire rotating shaft 110 within the pipeline. The housing 300 is sleeved on at least the outside of the infusion tube 200, and there is a gap between the housing 300 and the infusion tube 200. The housing 300 is preferably a tubular structure, for example. Preferably, the distal end of the housing 300 has a liquid inlet 310, and the liquid inlet 310 is communicated with the gap between the housing 300 and the infusion tube 200 for an infusion fluid to flow in. The flow direction of the infusion fluid can refer to the dashed arrow in the figure.

[0046] The infusion cavity 400 includes an outer infusion cavity 410, an inner infusion cavity 420, and a communication cavity 430. The gap between the housing 300 and the infusion tube 200 forms the outer infusion cavity 410 to form an inflow path for an infusion fluid for the infusion fluid to flow in from the liquid inlet 310. The gap between the infusion tube 200, the rotating shaft sleeve 120, and the rotating shaft 110 forms the inner infusion cavity 420 to form an outflow path for the infusion fluid for the infusion fluid to flow out from the distal end to the proximal end, thereby carrying away the wear debris generated by the relative movement between the rotating shaft 110 and the rotating shaft sleeve 120. It should be understood that the inner infusion cavity 420 is also used for part of the infusion fluid to flow out from the distal end B of the rotating shaft assembly 100 to prevent blood from entering the inner infusion cavity 420 and prevent thrombus formation.

[0047] The communicating cavity 430 penetrates through the pipe wall of the perfusion tube 200 and communicates with the outer perfusion cavity 410 and the inner perfusion cavity 420, so that the inflow path and the outflow path are communicated to form the entire perfusion and reflux path. The arrangement of the communicating cavity 430 enables the perfusion fluid to enter the inner perfusion cavity 420 through the independent cavity of the communicating cavity 430. The structure, quantity and size of the communicating cavity 430 can be set according to the actual requirements for the volume, flow rate, etc. of the perfusion fluid. For example, the structure of the communicating cavity 430 can be a communicating hole, and the quantity of the communicating cavity 430 can be one or two. Moreover, the communicating cavity 430 can be arranged at any position of the perfusion tube 200 according to different dynamic requirements for the perfusion fluid. For example, the communicating cavity 430 is arranged at different axial positions of the perfusion tube 200. For example, the rotating shaft assembly 100 preferably further includes a support member 130, and the support member 130 is arranged on the rotating shaft 110. Comparing the axial position of the communicating cavity 430 on the perfusion tube 200 with the axial position of the support member 130, the axial position of the communicating cavity 430 on the perfusion tube 200 can be on the proximal side or the distal side of the axial position of the support member 130. It should be understood that since the rotating shaft 110 has an axis, the perfusion tube 200 sleeved along the rotating shaft 110 also has an axis, and the axis of the perfusion tube 200 is consistent with the axis of the rotating shaft assembly 100. In this embodiment, the axial position of the communicating cavity 430 on the perfusion tube 200 is simplified to the axial position of the communicating cavity 430. Such an arrangement can adjust the flow rate and flow volume of the perfusion fluid in the perfusion cavity 400, can also form different perfusion paths, obtain different liquid dynamics, can obtain the optimal liquid power efficiency and perfusion efficiency, and further improve the perfusion and cleaning efficiency.

[0048] Preferably, as Figure 1 With Figure 2As shown, the rotating shaft assembly 100 further includes a support member 130. The support member 130 is disposed on the rotating shaft 110 and is located within the inner perfusion cavity 420 to support the rotation of the rotating shaft 110. There is a gap between the support member 130 and the rotating shaft 110, or the support member 130 has a gap in its own structure for the perfusion fluid to flow through, so that the inner perfusion cavity 420 forms an outflow path. The support member 130 preferably includes, but is not limited to, rolling bearings, sliding bearings, etc. When the support member 130 is a rolling bearing, the gap between the inner and outer rings of the rolling bearing forms the outflow path. When the support member 130 is a sliding bearing, the assembly gap between the sliding bearing and the rotating shaft 110 forms the outflow path. The support member 130 includes the first support member 131. In the axial direction of the rotating shaft 110, the axial position of the communication cavity 430 is on the proximal side of the axial position of the first support member 131, so that the outflow path of the perfusion fluid does not pass through the first support member 131, improving the efficiency of flushing the debris at the middle and distal ends of the rotating shaft 110 with the perfusion fluid. The first support member 131 is preferably a sliding bearing, which has less debris and better working stability compared to a rolling bearing.

[0049] Preferably, the support member 130 further includes: at least one second support member 132. The second support member 132 can be a sliding bearing or a rolling bearing. In this embodiment, it is preferably a rolling bearing, which has low frictional resistance and high working precision. All the second support members 132 are located on the proximal side of the first support member 131. The axial position of the communication cavity 430 is on the proximal side or the distal side of at least one of the second support members 132. Or, the axial position of the communication cavity 430 is the same as the axial position of one of the second support members 132. For example, as Figure 1 、 Figure 2 and Figure 6 shown, the axial position of the communication cavity 430 is preferably on the distal side of all the second support members 132, so that the perfusion fluid flows back from the distal end to the proximal end of the second support member 132, and the perfusion fluid takes out the debris generated by the rotating shaft assembly 100 out of the body. Preferably, as Figure 4As shown, the axial position of the communication cavity 430 is preferably located on one side of the proximal ends of all the second support members 132, which can also enable the perfusion fluid to carry out the abrasion debris generated by the rotating shaft assembly 100 out of the body. It should be understood that by arranging the communication cavity 430 on the proximal side of the second support member 132, the perfusion fluid enters the inner perfusion cavity 420 through the communication cavity 430 and can flow out of the body without passing through the gap between the second support member 132 and the rotating shaft 110, which can avoid the situation of blocking the outflow path caused by the blockage of the gap between the second support member 132 and the rotating shaft 110, and ensure that the perfusion fluid can wash out the abrasion debris generated between the rotating shaft 110 and the rotating shaft sleeve 120, improving the flushing efficiency. Preferably, as Figure 7 、 Figure 8 shown, when the perfusion cleaning device includes at least two second support members 132, in order to ensure the perfusion cleaning efficiency, the axial position of the communication cavity 430 is located between the axial positions of the two second support members 132. At least two second support members 132 can be axially adjacent (as Figure 8 shown), or can be axially non-adjacent. Preferably, as Figure 5 、 Figure 8 shown, the axis of the communication cavity 430 is in the same axial position as that of the second support member 132, so that the perfusion fluid forms two branches at the position of the second support member 132. It should be understood that at this time, the length of the communication cavity 430 along the axis of the rotating shaft 110 is greater than the length of the second support member 132 along its axis, so as to ensure that the perfusion fluid can flow into the inner perfusion cavity 420 through the communication cavity 430. Of course, the communication cavity 430 can also be arranged in a staggered manner with the second support member 132 to form at least one gap, so that the communication cavity 430 is communicated with the inner perfusion cavity 420. More preferably, the setting position of the communication cavity 430 of the perfusion cleaning device can be a combination of the above several situations. For example, as Figure 7As shown, the number of the communication cavities 430 is multiple. One communication cavity 430 is disposed on the distal side of all the second support members 132, and another communication cavity 430 is disposed between two second support members 132. Preferably, the number of the second support members 132 is at least two, such as 3, 4, etc., so as to ensure more stable rotation of the rotating shaft 110 and small radial runout. Preferably, at least two second support members 132 are uniformly arranged along the axial direction of the rotating shaft 110, further improving the rotation stability of the rotating shaft 110. In this embodiment, the number of at least two second support members 132 is 3, and communication cavities 430 are sequentially arranged at the distal ends of the three second support members 132, so that the perfusion liquid enters the inner perfusion cavity 420 through the communication cavities 430, and then each second support member 132 is independently flushed, making the flushing force stronger and the flushing effect better. While ensuring the liquid power efficiency, the abrasive particles generated by the movement of the second support member 132 can also be flushed out along the outflow path. Preferably, the distance between the axial position of the communication cavity 430 and the axial position of the second support member 132 is not greater than 2 mm, so as to improve the perfusion flushing efficiency and reduce the axial length of the rotating shaft 110. Preferably, the communication cavity 430 disposed between two second support members 132 is equidistant from the two second support members 132, and the dynamic properties of the perfusion liquid flowing in from each communication cavity 430 are substantially the same, making the dynamic performance of the perfusion liquid better. More preferably, as Figure 11 described, one of the communication cavities 430 is disposed on the distal side of the second support member 132, and another communication cavity 430 can also be disposed on the proximal side of the second support member 132. More preferably, as Figure 8 described, one of the communication cavities 430 is disposed on the distal side of all the second support members 132, and the other communication cavity 430 is disposed at the axial position of one of the second support members 132. By setting the communication cavities 430 at different positions in this way, different combinations of perfusion paths are formed, so as to obtain the best liquid power efficiency and perfusion efficiency and prevent wear particles from entering the body. When the communication cavity 430 is disposed on the distal side of the second support member 132, the perfusion liquid can also flush the abrasive particles generated by the relative movement between the second support member 132 and the rotating shaft 110 into the outflow path through the outflow path formed by communicating with the communication cavity 430, further purifying the perfusion path and preventing the abrasive particles from flowing into the blood.

[0050] Preferably, as Figure 2 、 Figure 3As shown, the communication cavity 430 includes communication holes, and the number of the communication holes is at least one. The communication holes are preferably cylindrical holes, for example, to ensure the maximum flow volume of the liquid. Of course, the communication holes are not limited to cylindrical holes, and can also be elliptical holes, square holes, etc. When the number of the communication holes is two or more, the communication holes are arranged along the axial direction or the circumferential direction of the perfusion tube 200. Preferably, for example, as Figure 7 shown, the communication holes are arranged in sequence along the axial direction of the perfusion tube 200, so that the liquid flow can flow out of the inner perfusion cavity 420 to the distal end orderly. Preferably, for example, as Figure 6 shown, the communication holes are arranged along the circumferential direction of the perfusion tube 200, thereby increasing the liquid flow rate. The communication holes arranged in the circumferential direction can be symmetrically arranged relative to the rotating shaft 10 or asymmetrically arranged. Those skilled in the art can set according to actual needs.

[0051] Preferably, as Figure 4 shown, the axial direction of the communication hole is arranged at an acute angle with the axial direction of the perfusion tube 200, so that the flow direction of the perfusion liquid in the communication cavity 430 is at an acute angle with the axial direction of the perfusion tube 200. Preferably, the communication hole faces a second support member 132, so that the perfusion liquid can directly wash the side surface of the second support member 132. The perfusion liquid can be divided into two paths at the position of the second support member 132. One path is diverted to the inflow path, taking away the abrasive particles and flowing out to the proximal end, and the other path is diverted into the body to prevent blood from entering the device.

[0052] Preferably, the communication cavity 430 is arranged around the perfusion tube 200, that is, the perfusion tube 200 is segmented by the communication cavity 430 along its axial direction, thereby increasing the flow rate of the perfusion liquid in the communication cavity 430.

[0053] Preferably, the communication cavity 430 is uniformly arranged along the axial direction of the perfusion tube 200 to ensure that the dynamic performance of the perfusion liquid entering the inner perfusion cavity 420 is generally the same, ensure the uniform force on the rotating shaft 110 and the support member 130, and ensure the perfusion stability of the perfusion cleaning device. When the communication cavity 430 is a communication hole, the communication holes can also be uniformly arranged along the circumferential direction of the perfusion tube 200, so that when the perfusion liquid flows into the inner perfusion cavity 420, the dynamic performance of the perfusion liquid is similar and the radial force is uniform.

[0054] Preferably, the perfusion cleaning device further includes an input pump (not shown) and an output pump (not shown). The input pump is communicated with the outer perfusion cavity 410 to pump the perfusion liquid into the inflow path; the output pump is communicated with the inner perfusion cavity 420 to pump the perfusion liquid out of the outflow path, thereby providing power for the flow of the perfusion liquid.

[0055] Preferably, the perfusion cavity 400 includes a spiral cavity 440, and the spiral direction of the spiral cavity 440 gradually approaches the proximal end along the rotation direction of the rotating shaft 110. The spiral cavity 440 is disposed on the wall of the rotating shaft 110, and / or the spiral cavity 440 is disposed on the inner wall of the perfusion tube 200. It can be understood that the spiral cavity 440 needs to generate a vortex that is conducive to the outflow of the perfusion fluid to the proximal end, preventing wear particles from moving towards the distal end and avoiding their entry into the body. Therefore, the spiral direction gradually approaching the proximal end extending means that when the rotating shaft 110 rotates, the perfusion fluid is driven to flow along the proximal end by using the spiral pushing principle. The rotation direction of the spiral direction can be changed according to the different rotation directions of the rotating shaft 110. For example, viewed from the proximal end, when the rotating shaft 110 rotates clockwise, the spiral cavity 440 is left-handed.

[0056] Preferably, the rotating shaft assembly 100 further includes the impeller 140, and the impeller 140 is connected to the end of the distal end of the rotating shaft 11. There is a gap between the proximal end of the impeller 140 and the distal end of the perfusion tube 200 for the circulation of the perfusion fluid. In this way, the perfusion fluid in the inner perfusion cavity 420 can flow into the body through this gap, preventing it from flowing into this gap and forming thrombus on the structural member, and also preventing blood from flowing into the inner perfusion cavity 420.

[0057] The present invention also provides a percutaneous blood pumping device, including: the perfusion cleaning device as described above. This percutaneous blood pumping device has the beneficial effects brought by the perfusion cleaning device, which will not be elaborated here. For the structures and principles of other components of the percutaneous blood pumping device, reference can be made to the prior art and will not be further described here.

[0058] In summary, in a perfusion cleaning device and a percutaneous blood pumping device provided by the present invention, the perfusion cleaning device includes: a rotating shaft assembly, a perfusion tube, a housing, and a perfusion chamber; the rotating shaft assembly includes a rotating shaft and a rotating shaft sleeve, the rotating shaft sleeve is sleeved on the proximal end and the middle part of the rotating shaft, and there is a gap between the rotating shaft sleeve and the rotating shaft; the perfusion tube is sleeved on the distal end of the rotating shaft, the perfusion tube is axially connected to the rotating shaft sleeve along the axis of the rotating shaft, and there is a gap between the perfusion tube and the rotating shaft; the housing is at least sleeved outside the perfusion tube, and there is a gap between the housing and the perfusion tube; the perfusion chamber includes an outer perfusion chamber, an inner perfusion chamber, and a communication chamber; the gap between the housing and the perfusion tube forms the outer perfusion chamber to form an inflow path of the perfusion liquid; the gaps between the perfusion tube, the rotating shaft sleeve, and the rotating shaft form the inner perfusion chamber to form an outflow path of the perfusion liquid; the communication chamber is provided through the tube wall of the perfusion tube and communicates the outer perfusion chamber and the inner perfusion chamber. With such a setting, the flow rate and flow volume of the perfusion liquid in the perfusion chamber can be adjusted, different perfusion paths can be formed, different liquid dynamics can be obtained, the optimal liquid power efficiency and perfusion efficiency can be obtained, and thus the perfusion cleaning efficiency can be improved.

[0059] In addition, it should also be recognized that although the present invention has been disclosed above with preferred embodiments, the above embodiments are not intended to limit the present invention. For any person skilled in the art, without departing from the scope of the technical solution of the present invention, many possible changes and modifications can be made to the technical solution of the present invention by using the technical content disclosed above, or modified into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the scope of protection of the technical solution of the present invention.

Claims

1. A perfusion cleaning device, characterized in that, Comprising: a rotating shaft assembly, a perfusion tube, a housing, and a perfusion cavity; The rotating shaft assembly includes a rotating shaft and a rotating shaft sleeve, the rotating shaft sleeve is sleeved on the proximal end portion and the middle portion of the rotating shaft, and there is a gap between the rotating shaft sleeve and the rotating shaft; The perfusion tube is sleeved on the distal end portion of the rotating shaft, the perfusion tube is axially connected to the rotating shaft sleeve along the axis of the rotating shaft, and there is a gap between the perfusion tube and the rotating shaft; The housing is at least sleeved outside the perfusion tube, and there is a gap between the housing and the perfusion tube; The perfusion cavity includes an outer perfusion cavity, an inner perfusion cavity, and a communication cavity; the gap between the housing and the perfusion tube forms the outer perfusion cavity to form an inflow path for the perfusion liquid; the gaps between the perfusion tube, the rotating shaft sleeve and the rotating shaft form the inner perfusion cavity to form an outflow path for the perfusion liquid; the communication cavity is provided through the tube wall of the perfusion tube and communicates the outer perfusion cavity and the inner perfusion cavity; The rotating shaft assembly further includes a support member, the support member is arranged on the rotating shaft and is located in the inner perfusion cavity to support the rotation of the rotating shaft; there is a gap between the support member and the rotating shaft during assembly, or the support member itself has a gap for the perfusion liquid to flow through; The support member includes a first support member, in the axial direction of the rotating shaft, the axial position of the communication cavity is on the proximal side of the axial position of the first support member, wherein the first support member is a sliding bearing; The support member further includes at least one second support member, all the second support members are located on the proximal side of the first support member, the axial position of the communication cavity is on the proximal side or the distal side of at least one of the second support members, or the axial position of the communication cavity is the same as the axial position of one of the second support members.

2. The perfusion cleaning device according to claim 1, wherein, The support member further includes: at least two of the second support members, and the axial position of the communication cavity is between the axial positions of two of the second support members.

3. The perfusion cleaning device according to claim 1, characterized in that The communication cavity includes communication holes, when the number of the communication holes is two or more, the communication holes are arranged axially or circumferentially along the perfusion tube.

4. The perfusion cleaning device according to claim 3, characterized in that, The axis of the communication hole is arranged at an acute angle with the axis of the perfusion tube.

5. The perfusion cleaning device according to claim 1, characterized in that, The communication cavity surrounds the perfusion tube.

6. The perfusion cleaning device according to claim 1, characterized in that, The perfusion cleaning device further includes an input pump and an output pump; the input pump communicates with the outer perfusion cavity to pump the perfusion liquid into the inflow path; the output pump communicates with the inner perfusion cavity to pump the perfusion liquid out of the outflow path.

7. The perfusion cleaning device according to claim 1, characterized in that The perfusion cavity includes a spiral cavity, and the spiral direction of the spiral cavity gradually extends closer to the proximal end along the rotation direction of the rotating shaft; the spiral cavity is arranged on the wall of the rotating shaft, and / or the spiral cavity is arranged on the inner wall of the perfusion tube.

8. The perfusion cleaning device according to claim 1, characterized in that, The rotating shaft assembly further includes an impeller, the impeller is connected to the distal end of the rotating shaft, and there is a gap between the proximal end of the impeller and the distal end of the perfusion tube for the perfusion liquid to flow through.

9. A percutaneous blood pumping device, characterized in that, Comprising: The perfusion cleaning device according to any one of claims 1-8.

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