A highly efficient filtering heart-lung bypass assistance device

Abstract

The utility model discloses a kind of high-efficiency filtration's heart disease extracorporeal circulation auxiliary equipment, it is related to medical equipment technical field.The utility model includes spiral plate, its both ends and the outer end of peripheral side face are closed arrangement;Several delivery tubes, it is respectively fixed in the position of spiral plate near outer spiral and the position near inner spiral, and with spiral plate inside intercommunication;Several arc plates, it is staggered and arranged in the two inner walls of spiral plate adjacent, and its arc surface protrudes towards the flowing direction of liquid.The utility model is filtered to blood by the spiral plate of horizontal arrangement, arc plate similar to spoon and inner cylinder, and arc plate one end and spiral plate inner wall reserved part gap, and then when filter membrane on arc plate is blocked, blood can still be normal circulation, and arc plate is provided with multiple groups, when there is arc plate unable to filter, arc plate located in rear side can still filter blood, and then under the condition of guaranteeing blood circulation, continuous filtration is carried out.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to a high-efficiency filtration extracorporeal circulation auxiliary device for heart disease. Background Technology

[0002] Cardiopulmonary bypass devices are essential instruments in cardiovascular surgery, used to maintain blood circulation and oxygenation during cardiac arrest. Traditional extracorporeal circulation systems typically include components such as a blood pump, oxygenator, and filter. The filter removes air bubbles, blood clots, and small particles from the blood to reduce the risk of embolism and protect the patient's organs. However, existing filtration devices suffer from low filtration efficiency, high blood flow resistance, and the potential for turbulence that can damage blood cells, impacting surgical safety and patient outcomes.

[0003] Currently, most common blood filtration devices employ a linear structure with a simple filter membrane arrangement and a short blood flow path, leading to insufficient filtration or the need for multiple cycles. Some improved designs increase efficiency by increasing the filter membrane area or using multi-layer filtration structures, but these often come with increased volume and blood flow resistance. Furthermore, traditional filtration structures suffer from poor blood flow uniformity, with localized eddies or stagnation easily forming, increasing the risk of hemolysis.

[0004] To address these issues, we provide a highly efficient filtering cardiopulmonary bypass device. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: The present invention is a high-efficiency filtration cardiopulmonary bypass auxiliary device, including a spiral plate with a filter membrane on its side wall, and its two ends and the outer end of its peripheral side are closed.

[0006] Several liquid conveying pipes are fixed to the spiral plate at positions near the outer spiral and near the inner spiral, respectively, and are connected to the interior of the spiral plate.

[0007] Several arc-shaped plates equipped with filter membranes are staggered on the two adjacent inner walls of the spiral plate, with their arc-shaped surfaces protruding in the direction of liquid flow.

[0008] The arc-shaped plate has a gap between one side and the inner wall of the spiral plate, forming a channel for liquid to flow.

[0009] The present invention is further configured such that the distribution intervals of the arc-shaped plates on the inner wall of the spiral plate are not equal, and as the spiral plate gradually contracts inward, the distance between two adjacent arc-shaped plates on its inner wall increases.

[0010] The present invention is further configured such that a plurality of protruding strips are fixed on the inwardly recessed inner wall of the arc-shaped plate, the side of the protruding strips is arc-shaped, and the part of the protruding strips connected to the inner wall of the arc-shaped plate is smoothly connected.

[0011] The present invention is further configured such that a guide plate is fixed at the end of the arc-shaped plate that does not fit against the inner wall of the spiral plate, with the guide plate having the opposite bending direction.

[0012] The present invention is further configured to include an inner cylinder on which a filter membrane is installed, the inner cylinder being fixed inside the spiral plate, and its peripheral side being fixedly connected to one end of the inner side of the spiral plate, the portion of the spiral plate connected to the peripheral side of the inner cylinder being smoothly connected.

[0013] The present invention is further configured such that all the conveying pipes are vertically upward, one of the conveying pipes is located on the outside of the spiral plate, and the other conveying pipe is located on the inside of the spiral plate and is connected to the inside of the inner cylinder.

[0014] The present invention has the following beneficial effects: 1. The present invention guides the blood by setting a horizontally arranged spiral plate. As the blood moves on the inner wall of the spiral plate, its flow direction is constantly changing, which hinders the formation of microemboli in the blood and causes them to adhere to the filter screen. Compared with a straight flow channel, the path is longer and the volume is smaller, resulting in higher microemboli adsorption efficiency, thereby improving the filtration efficiency.

[0015] 2. In this invention, when blood passes through the arc-shaped plate, the arc-shaped plate acts like a spoon relative to the blood, thus blocking the blood flow. Microemboli impacting the arc-shaped plate can adhere to the inner wall of the arc-shaped plate. Multiple sets of arc-shaped plates provide multi-layered obstruction along the blood flow path, achieving multi-layered blocking of microemboli and improving the blood filtration efficiency.

[0016] 3. In this invention, one end of the arc-shaped plate is not connected to the inner wall of the spiral plate, leaving a gap. This allows blood to still flow normally even when the filter membrane on the arc-shaped plate becomes clogged. Furthermore, multiple sets of arc-shaped plates are provided. When one arc-shaped plate fails to filter, the arc-shaped plate located on the rear side can still filter the blood, thus ensuring continuous filtration while maintaining blood flow.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a highly efficient filtration extracorporeal circulation support device for heart disease.

[0020] Figure 2 For the present utility model Figure 1 Enlarged view of region A.

[0021] Figure 3 For the present utility model Figure 1 Another perspective structural diagram.

[0022] Figure 4 For the present utility model Figure 3 Partial sectional view.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Spiral plate; 2. Conveying pipe; 3. Arc plate; 4. Convex strip; 5. Guide plate; 6. Inner cylinder. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation

[0027] Please see Figure 1 This utility model is a high-efficiency filtering cardiopulmonary bypass auxiliary device, including a spiral plate 1 with a filter membrane on its side wall, and its two ends and the outer end of its peripheral side are closed.

[0028] Specifically, the spiral plate 1 is placed horizontally during use, and blood flows inside the spiral plate 1. The spiral plate 1 guides the blood. Since the side wall of the spiral plate 1 is curved, the flow direction of the liquid is parallel to its tangent when the blood passes through its side wall. As a result, microemboli carried in the blood are more likely to adhere to the filter membrane set on the side wall of the spiral plate 1. Moreover, since the flow direction of the blood is constantly changing as it moves through the inner wall of the spiral plate 1, it hinders the formation of microemboli in the blood, causing them to adhere to the filter screen. Compared with a straight flow channel, the path is longer and the volume is smaller, resulting in a higher microemboli adsorption efficiency, thereby improving the filtration efficiency.

[0029] For further details, please refer to Figure 1 , Figure 2Several arc-shaped plates 3 equipped with filter membranes are staggered on the two adjacent inner walls of the spiral plate 1, and their arc-shaped surfaces protrude in the direction of liquid flow.

[0030] Specifically, blood flows from the outside to the inside of the spiral plate 1. The arc plate 3 protrudes towards the inner circle of the spiral plate 1. When blood passes through the arc plate 3, the arc plate 3 acts like a spoon relative to the blood, forming a barrier. Microemboli that impact the arc plate 3 can adhere to the inner wall of the arc plate 3. Multiple sets of arc plates 3 provide multi-layered obstruction along the blood flow path, achieving multi-layered blocking of microemboli and improving the blood filtration efficiency.

[0031] For further details, please refer to Figure 1 , Figure 2 A gap is left between one side of the arc-shaped plate 3 and the inner wall of the spiral plate 1, forming a channel for liquid to flow.

[0032] Specifically, as more and more microemboli adhere to the filter membrane on the arc plate 3, they may become blocked, preventing blood from passing through. In order to ensure normal blood flow, one end of the arc plate 3 is not connected to the inner wall of the spiral plate 1, leaving a gap. Thus, when the filter membrane on the arc plate 3 becomes blocked, blood can still flow normally. Furthermore, multiple sets of arc plates 3 are provided. When one arc plate 3 cannot filter, the arc plate 3 located on the rear side can still filter the blood, thus ensuring continuous filtration while maintaining blood flow.

[0033] For further details, please refer to Figure 1 The distribution intervals of the arc-shaped plates 3 on the inner wall of the spiral plate 1 are not equal, and as the spiral plate 1 gradually contracts inward, the distance between two adjacent arc-shaped plates 3 on its inner wall increases.

[0034] Specifically, when blood first enters the spiral plate 1, it carries a relatively large number of microemboli. As the blood slowly flows into the inner circle of the spiral plate 1, the number of microemboli gradually decreases, and the spacing of the arc-shaped plates 3 set on the inner side of the spiral plate 1 becomes larger and larger, thus saving costs.

[0035] For further details, please refer to Figure 1 , Figure 2 The inner wall of the arc plate 3 is recessed inward and has several protruding strips 4. The sides of the protruding strips 4 are arc-shaped, and the part of the protruding strips 4 that connects with the inner wall of the arc plate 3 is smoothly connected.

[0036] Specifically, by setting the convex strip 4, the total area of ​​the inner wall of the arc plate 3 is increased, thereby increasing the attachment area of ​​microemboli and improving the blood filtration efficiency.

[0037] For further details, please refer to Figure 1 , Figure 2 The end of the arc plate 3 that does not fit against the inner wall of the spiral plate 1 is fixed with a guide plate 5 that is opposite to its bending direction;

[0038] Furthermore, the arc-shaped surface of the guide plate 5 smoothly guides the blood. When the blood passes through the arc-shaped plate 3, the microemboli on it adhere to the inner wall of the arc-shaped plate 3. Part of the blood passes through the filter membrane, while the other part of the blood flows to the guide plate 5 guided by the arc-shaped surface of the arc-shaped plate 3. Then, the guide plate 5 guides the blood to flow through the gap between the arc-shaped plate 3 and the inner wall of the spiral plate 1, which improves the smoothness of blood flow.

[0039] For further details, please refer to Figure 1 , Figure 3 , Figure 4 It also includes an inner cylinder 6 with a filter membrane installed. The inner cylinder 6 is fixed inside the spiral plate 1, and its peripheral side is fixedly connected to one end of the inner side of the spiral plate 1. The part where the spiral plate 1 is connected to the peripheral side of the inner cylinder 6 is smoothly connected.

[0040] Furthermore, the inner cylinder 6 is a closed cylinder, serving as a second line of defense for blood filtration. Since there is a gap between the arc plate 3 and the inner wall of the spiral plate 1, it is impossible to guarantee that 100% of the microemboli will be filtered. Therefore, the inner cylinder 6 is set inside the spiral plate 1. When blood passes through the inner cylinder 6, it will inevitably pass through the filter membrane on it and enter the inner cavity of the inner cylinder 6, ensuring that microemboli can be blocked. Moreover, most of the microemboli in the blood that reaches the inner cylinder 6 have been filtered, so the inner cylinder 6 is not easy to clog, thus improving the blood filtration efficiency.

[0041] For further details, please refer to Figure 4 Several liquid conveying pipes 2 are fixed at positions near the outer spiral and near the inner spiral of the spiral plate 1, respectively, and are connected to the interior of the spiral plate 1.

[0042] All conveying pipes 2 are set to be vertically upward. One conveying pipe 2 is located on the outside of the spiral plate 1, and the other conveying pipe 2 is located on the inside of the spiral plate 1 and is connected to the inside of the inner cylinder 6.

[0043] Specifically, blood enters vertically downward through the delivery tube 2, which allows it to achieve a relatively high velocity, facilitating smooth blood flow within the spiral plate 1. Meanwhile, blood flows vertically upward out, which to some extent reduces the velocity of microemboli that are not successfully blocked, making them less likely to flow out of the delivery tube 2, thereby further improving the blood filtration efficiency.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency filtering extracorporeal circulation support device for heart disease, characterized in that: include A spiral plate (1) with a filter membrane on its sidewall is closed at both ends and the outer end of its peripheral side. Several liquid conveying pipes (2) are fixed to the spiral plate (1) at positions near the outer spiral and positions near the inner spiral, respectively, and are connected to the interior of the spiral plate (1); Several arc-shaped plates (3) with filter membranes installed are staggered on the two adjacent inner walls of the spiral plate (1), and their arc-shaped surfaces protrude in the direction of liquid flow. The arc-shaped plate (3) has a gap between one side and the inner wall of the spiral plate (1), forming a channel for liquid to flow.

2. The high-efficiency filtration extracorporeal circulation support device for heart disease according to claim 1, characterized in that, The distribution intervals of the arc-shaped plates (3) on the inner wall of the spiral plate (1) are not equal, and as the spiral plate (1) gradually shrinks inward, the distance between two adjacent arc-shaped plates (3) on its inner wall becomes larger.

3. The high-efficiency filtration extracorporeal circulation support device for heart disease according to claim 2, characterized in that, The inner wall of the arc plate (3) is fixed with several protrusions (4), the side of the protrusions (4) is arc-shaped, and the part of the protrusions (4) connected to the inner wall of the arc plate (3) is smoothly connected.

4. The high-efficiency filtration extracorporeal circulation support device for heart disease according to claim 3, characterized in that, The end of the arc-shaped plate (3) that does not fit against the inner wall of the spiral plate (1) is fixed with a guide plate (5) that points in the opposite direction to its curvature.

5. The high-efficiency filtration extracorporeal circulation support device for heart disease according to claim 4, characterized in that, It also includes an inner cylinder (6) with a filter membrane installed. The inner cylinder (6) is fixed inside the spiral plate (1), and its peripheral side is fixedly connected to one end of the inner side of the spiral plate (1). The portion where the spiral plate (1) is connected to the peripheral side of the inner cylinder (6) is smoothly connected.

6. The high-efficiency filtration extracorporeal circulation support device for heart disease according to claim 5, characterized in that, All conveying pipes (2) are set to face vertically upwards. One of the conveying pipes (2) is set on the outside of the spiral plate (1), and the other conveying pipe (2) is set on the inside of the spiral plate (1) and connected to the inside of the inner cylinder (6).

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