Blood filtration system

Abstract

To provide a blood filtration system that simplifies the structure of a conduit and facilitates automatic air evacuation.SOLUTION: A blood filtration system includes a first blood storage bag, a second blood storage bag, a first conduit, a filter, and a second conduit. The first blood collection bag is used to store blood. The first conduit connects between the first blood storage bag and the second blood storage bag. The filter is disposed in the first conduit, so that it is suitable for blood to flow from the first blood storage bag through the first conduit, pass through the filter, and reach the second blood storage bag. The second conduit connects between the first blood storage bag and the second blood storage bag, so that it is suitable for air in the second blood storage bag to reach the first blood storage bag via the second conduit.SELECTED DRAWING: Figure 2C

Description

[Technical Field]

[0001] The present invention relates to filtration systems, and more particularly to hemofiltration systems. [Background technology]

[0002] During blood donation, the donor's blood is generally first transported into a whole blood bag, then passed through a pipeline equipped with a filter to filter out substances such as white blood cells, and the filtered blood is then transported through the pipeline to a collection bag. During the process of transporting the filtered blood to the collection bag, air inside the collection bag needs to be discharged through the pipeline, but because the blood to be transported to the collection bag is still in the pipeline, it is difficult to automatically discharge the air inside the collection bag through the pipeline.

[0003] Therefore, the pipeline generally requires the addition of an exhaust bypass in parallel with the filter, and to exhaust the collection bag, a clamp is first used to close the flow path through the filter, stopping the transfer of blood to the collection bag, and then the collection bag is manually pressed, causing the air in the collection bag to enter the pipeline and be discharged into the upstream blood bag via the exhaust bypass.This design method results in a complex pipeline structure and requires manual pressure to be applied to exhaust the air, which is very time-consuming, cumbersome, and inconvenient. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a blood filtering system that simplifies the structure of the ducts and can easily perform automatic evacuation. [Means for solving the problem]

[0005] The blood filtration system of the present invention includes a first blood storage bag, a second blood storage bag, a first conduit, a filter, and a second conduit. The first blood storage bag is used to store blood. The first conduit connects the first blood storage bag and the second blood storage bag. The filter is disposed in the first conduit and is suitable for blood to pass from the first blood storage bag through the first conduit and reach the second blood storage bag. The second conduit connects the first blood storage bag and the second blood storage bag and is suitable for air in the second blood storage bag to reach the first blood storage bag through the second conduit.

[0006] In one embodiment of the present invention, the first and second conduits are independent of each other.

[0007] In one embodiment of the present invention, the first conduit has a first inlet end and a first outlet end opposite to each other, the first inlet end being directly connected to the first blood storage bag and the first outlet end being directly connected to the second blood storage bag; the second conduit has a second inlet end and a second outlet end opposite to each other, the second inlet end being directly connected to the second blood storage bag and the second outlet end being directly connected to the first blood storage bag.

[0008] In one embodiment of the present invention, the first inlet end and the second outlet end are respectively connected to different positions of the first blood receiving bag, and the first outlet end and the second inlet end are respectively connected to different positions of the second blood receiving bag.

[0009] In one embodiment of the present invention, the blood filtering system further includes a check valve connected to the second pipeline, allowing air in the second blood storage bag to pass through the check valve via the second pipeline and reach the first blood storage bag, and the check valve is used to prevent blood in the first blood storage bag from flowing into the second blood storage bag via the second pipeline.

[0010] In one embodiment of the present invention, the check valve is located in the first blood containment bag.

[0011] In one embodiment of the present invention, the check valve is integrally connected to the first blood storage bag.

[0012] In one embodiment of the present invention, the material of the check valve is the same as the material of the first blood storage bag.

[0013] In one embodiment of the present invention, the check valve and the first blood containing bag are interconnected by high frequency welding.

[0014] In one embodiment of the present invention, the check valve includes a valve body and a blocking structure, wherein the blocking structure is used to block the flow path of the valve body, and the blocking structure is suitable for changing to an open state to open the flow path of the valve body. [Effects of the Invention]

[0015] In light of the above, the blood filtering system of the present invention includes a first pipeline between the first and second blood bags for transporting blood from the first to the second blood bag, and a second pipeline for discharging air from the second blood bag to the first blood bag. In other words, because blood transport and air discharge between the first and second blood bags occur via separate pipelines, the blood transport and air discharge channels of the blood filtering system do not share a common pipeline; instead, they are simply two independent pipelines. As a result, as blood passes through the first pipeline and is transported from the first blood bag to the second blood bag, the pressure inside the second blood bag increases with the increase in blood volume, causing the air inside the second blood bag to automatically flow through the second pipeline to the first blood bag. Therefore, the blood filtering system of the present invention simplifies the pipeline structure and facilitates automatic evacuation. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram of a blood filtration system according to one embodiment of the present invention. [Figure 2A]FIG. 2 illustrates the mechanism of action of the hemofiltration system of FIG. 1. [Figure 2B] FIG. 2 illustrates the mechanism of action of the hemofiltration system of FIG. 1. [Figure 2C] FIG. 2 illustrates the mechanism of action of the hemofiltration system of FIG. 1. [Figure 3A] FIG. 2 is a schematic cross-sectional view of the check valve of FIG. 1. [Figure 3B] FIG. 3B is a diagram illustrating the state in which the block structure of FIG. 3A is destroyed. DETAILED DESCRIPTION OF THE INVENTION

[0017] FIG. 1 is a schematic diagram of a blood filtration system according to one embodiment of the present invention. Referring to FIG. 1, the blood filtration system 100 in this embodiment includes a first blood storage bag 110, a second blood storage bag 120, a first conduit 130, a filter 140, and a second conduit 150. The first conduit 130 connects the first blood storage bag 110 and the second blood storage bag 120, the filter 140 is disposed in the first conduit 130, and the second conduit 150 connects the first blood storage bag 110 and the second blood storage bag 120. The first conduit 130 and the second conduit 150 are independent of each other. The blood filtration system 100 can be used to filter blood from a blood donor or for other purposes, but the present invention is not limited thereto.

[0018] 2A to 2C are diagrams illustrating the working mechanism of the blood filtration system of FIG. 1. In this embodiment, a first blood containing bag 110, such as a whole blood bag, is used to contain blood B from a blood donor, as shown in FIG. 2A. By manually pressing the first blood containing bag 110 or by other appropriate methods, blood B can be passed from the first blood containing bag 110 through a first conduit 130, a filter 140, and a second blood containing bag 120, which serves as a collection bag, as shown in FIG. 2B. The filtered blood is shown as blood B' in FIG. 2B. The filter 140 is used, for example, to filter white blood cells and / or other substances from the blood. The detailed filtering structure and method are well known in the art and will not be described in detail here. As shown in FIG. 2C, air in the second blood containing bag 120 is adapted to reach the first blood containing bag 110 through a second conduit 150. The air reaching the first blood containing bag 110 is shown as air A in FIG. 2C.

[0019] As described above, in the blood filtering system 100 of this embodiment, in addition to the first pipeline 130 used to transport blood from the first blood storage bag 110 to the second blood storage bag 120 provided between the first blood storage bag 110 and the second blood storage bag 120, a second pipeline 150 used to discharge air from the second blood storage bag 120 to the first blood storage bag 110 is also provided. In other words, because blood transport and air discharge between the first blood storage bag 110 and the second blood storage bag 120 are performed via different pipelines, the blood transport flow path and the air discharge flow path of the blood filtering system 100 do not share any pipelines, but rather simply have two independent pipelines.

[0020] As a result, during the process of blood being transported from the first blood storage bag 110 through the first pipeline 130 to the second blood storage bag 120, the pressure inside the second blood storage bag 120 rises as the amount of blood inside increases, and according to Pascal's principle, the air inside the second blood storage bag 120 automatically flows through the second pipeline 150 to the first blood storage bag 110. Therefore, the blood filtering system 100 of this embodiment has a simplified pipeline structure and can easily perform automatic evacuation.

[0021] Specifically, in this embodiment, the first conduit 130 has a first inlet end 130a and a first outlet end 130b opposite to each other, the first inlet end 130a being directly connected to the first blood storage bag 110, and the first outlet end 130b being directly connected to the second blood storage bag 120. The second conduit 150 has a second inlet end 150a and a second outlet end 150b opposite to each other, the second inlet end 150a being directly connected to the second blood storage bag 120, and the second outlet end 150b being directly connected to the first blood storage bag 110.

[0022] Furthermore, the first inlet end 130a and the second outlet end 150b are each connected to different positions on the first blood storage bag 110, and the first outlet end 130b and the second inlet end 150a are each connected to different positions on the second blood storage bag 120. Therefore, between the first blood storage bag 110 and the second blood storage bag 120, the first conduit 130 and the second conduit 150 are independent of each other as described above, and do not share any conduits.

[0023] In detail, in this embodiment, the blood filtration system 100 further includes a check valve 160, which is connected to the second conduit 150. Air in the second blood containing bag 120 is allowed to pass through the check valve 160 via the second conduit 150 and reach the first blood containing bag 110. The check valve 160 is used to prevent blood in the first blood containing bag 110 from flowing into the second blood containing bag 120 via the second conduit 150, thereby preventing the blood from blocking the air being discharged from the second conduit 150 to the first blood containing bag 110. The structural design and working mechanism of the check valve 160 for restricting unidirectional flow are well known in the art and will not be described in detail herein.

[0024] Further, in this embodiment, the material of the check valve 160 is, for example, the same as that of the first blood storage bag 110. The check valve 160 is located within the first blood storage bag 110 and is integrally connected to the first blood storage bag 110 by a high-frequency welding process or other suitable process. In this manner, the check valve 160 can be manufactured and installed using a simple process. By accommodating the check valve 160 within the first blood storage bag 110, there is no need to provide a separate chamber for accommodating the check valve 160. The materials of the first blood storage bag 110 and the check valve 160 can be PVC or other suitable plastic materials, but the present invention is not limited thereto. Furthermore, the materials of the second blood storage bag 120, the first conduit 130, and the second conduit 150 can also be PVC or other suitable plastic materials. In other embodiments, the check valve 160 can be located outside the first blood storage bag 110 and at a suitable position on the second conduit 150, but the present invention is not limited thereto.

[0025] FIG. 3A is a schematic cross-sectional view of the check valve of FIG. 1. FIG. 3B is a diagram illustrating the state in which the block structure of FIG. 3A is broken. Referring to FIG. 3A, in this embodiment, the check valve 160 includes a valve body 162 and a block structure 164. The block structure 164 is used to block the flow path of the valve body 162, and the block structure 164 is suitable for changing to an open state to open the flow path of the valve body 162. For example, as shown in FIG. 3A, the block structure 164 is a flow path blocking piece disposed in the valve body 162, which is broken when a user applies force to the valve body 162, thereby opening the flow path of the valve body 162, as shown in FIG. 3B. In another embodiment, the block structure 164 may be a clamping member (e.g., a plastic caliper) disposed upstream or downstream of the valve body 162 to clamp the pipeline upstream or downstream of the valve body 162 to block the flow path, and the user can apply force to the clamp to loosen it, thereby opening the flow path of the valve body 162. This ensures that the check valve 160 operates only when a venting operation is required, and prevents the check valve 160 from operating unintentionally when a venting operation is not being performed. Figures 3A and 3B only schematically show the structural shapes of the valve body 162 and the block structure 164, and in practice the valve body 162 and the block structure 164 may have other suitable shapes, and the present invention is not limited thereto.

[0026] In summary, the blood filtering system of the present invention includes a first conduit between the first and second blood bags for transporting blood from the first to the second blood bag, and a second conduit for discharging air from the second to the first blood bag. In other words, because blood transport and air discharge between the first and second blood bags occur via separate conduits, the blood transport and air discharge channels of the blood filtering system do not share a common conduit; instead, they are simply two independent conduits. As a result, as blood passes through the first conduit and is transported from the first blood bag to the second blood bag, the pressure inside the second blood bag increases with the increase in blood volume, causing the air inside the second blood bag to automatically flow through the second conduit to the first blood bag. Therefore, the blood filtering system of the present invention simplifies the conduit structure and facilitates automatic discharge. [Industrial Applicability]

[0027] The present invention provides a blood filtration system that can be applied to a blood donation device. [Explanation of symbols]

[0028] 100:Hemofiltration system 110: First blood storage bag 120: Second blood storage bag 130: 1st conduit 130a: 1st inlet end 130b: 1st exit end 140: Filter 150:Second conduit 150a: 2nd inlet end 150b: 2nd outlet end 160: Check valve 162: Valve body 164: Block structure A: Air B, B': Blood

Claims

1. a first blood storage bag used to store blood; a second blood storage bag; a first conduit connecting the first blood storage bag and the second blood storage bag; a filter disposed in the first conduit, the filter being adapted for the blood to pass from the first blood storage bag through the first conduit to the second blood storage bag; and a second conduit connecting the first blood storage bag and the second blood storage bag, the second conduit being suitable for air in the second blood storage bag to reach the first blood storage bag via the second conduit.

2. 2. The hemofiltration system of claim 1, wherein the first line and the second line are independent of each other.

3. 2. The blood filtering system of claim 1, wherein the first conduit has a first inlet end and a first outlet end opposite to each other, the first inlet end being directly connected to the first blood storage bag and the first outlet end being directly connected to the second blood storage bag; and the second conduit has a second inlet end and a second outlet end opposite to each other, the second inlet end being directly connected to the second blood storage bag and the second outlet end being directly connected to the first blood storage bag.

4. 4. The blood filtering system according to claim 3, wherein the first inlet end and the second outlet end are respectively connected to different positions of the first blood storage bag, and the first outlet end and the second inlet end are respectively connected to different positions of the second blood storage bag.

5. 2. The blood filtration system according to claim 1, further comprising a check valve, the check valve being connected to the second conduit and adapted to allow air in the second blood storage bag to pass through the check valve via the second conduit and reach the first blood storage bag, and the check valve being used to prevent the blood in the first blood storage bag from flowing into the second blood storage bag via the second conduit.

6. The hemofiltration system of claim 5 , wherein the check valve is located within the first blood storage bag.

7. The blood filtration system according to claim 5 , wherein the check valve is integrally connected to the first blood storage bag.

8. The blood filtering system according to claim 5 , wherein the material of the check valve is the same as the material of the first blood storage bag.

9. 6. The blood filtration system of claim 5, wherein the check valve and the first blood containing bag are interconnected by high frequency welding.

10. 6. The blood filtration system of claim 5, wherein the check valve includes a valve body and a block structure, the block structure being adapted to block the flow path of the valve body, and the block structure being adapted to change to an open state to open the flow path of the valve body.

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