Blood transfusion system used in cooperation with thrombus suction device

Abstract

The utility model discloses a blood transfusion system used in cooperation with a thrombus suction device, and relates to the technical field of medical instruments, the blood transfusion system comprises a three-way valve, the three-way valve comprises a straight-through pipe and a bypass pipe, one end of the straight-through pipe is a suction end, the other end of the straight-through pipe is an output end, the blood transfusion system further comprises a filtering assembly used for filtering thrombus and a blood collection transfusion device, the two filtering assemblies are arranged at the two ends of the straight-through pipe correspondingly, and detachable connecting cover bodies used for disassembling and assembling the corresponding filtering assemblies are arranged at the positions, close to the output end, of the straight-through pipe. According to the utility model, by controlling the opening and closing of the two control valves on the three-way valve straight-through pipe, sucked blood firstly enters the blood collection and transfusion device through the first group of filtering components to be stored, then is conveyed through the centrifugal pump in the blood collection and transfusion device to pass through the second group of filtering components, and then is sent back into a human body, so that the blood loss of a patient is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a blood reinfusion system used in conjunction with a thrombus aspiration device. Background Technology

[0002] Embolism refers to the phenomenon where abnormal substances that are insoluble in blood appear in the circulating blood and travel to distant locations to block blood vessels. Currently, there are many techniques to remove emboli and restore blood flow to blood vessels. One of the common treatment methods is mechanical thrombectomy.

[0003] Existing mechanical thrombectomy methods involve inserting a medical catheter into the location of the thrombus in the patient's body, and then using a suction device to aspirate the thrombus. This method can effectively remove old thrombi, has advantages such as high efficiency, short operation time, low risk of distal embolism, and few complications.

[0004] However, existing thrombus removal devices still have the following shortcomings: Although they can remove thrombi from the body, when multiple suctions are required, the blood drawn out is usually discharged directly from the suction catheter. A single procedure can cause the patient to lose 300-600ml of blood. Furthermore, the drawn blood cannot be recycled because it is mixed with thrombi, and it is also not easy to return to the body, resulting in significant blood loss for the patient. Utility Model Content

[0005] The purpose of this invention is to provide a blood reinfusion system for use with a thrombus aspiration device, in order to solve the technical problem in the prior art where the blood aspirated during thrombus aspiration treatment is difficult to process and return to the patient's body, resulting in massive blood loss for the patient.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0007] A blood reinfusion system for use with a thrombus aspiration device includes a three-way valve, the three-way valve comprising a straight-through tube and a bypass tube, one end of the straight-through tube being an aspiration end and the other end being an output end, and further comprising:

[0008] The filter assembly for filtering blood clots is provided in two sets, which are respectively located at both ends of a straight tube. The straight tube is provided with a detachable connecting cover for assembling and disassembling the corresponding filter assembly near the output end.

[0009] A blood collection and reinfusion device is connected to a bypass pipe. Control valves are provided at both ends of the bypass pipe. One control valve is used to control the on / off state between the blood collection and reinfusion device and the suction end of the bypass pipe, and the other control valve is used to control the on / off state between the blood collection and reinfusion device and the output end of the bypass pipe.

[0010] As a further embodiment of this utility model: each group of filter components includes a filter tube and a filter element, wherein the filter element is disposed inside the filter tube.

[0011] As a further embodiment of this utility model: the filter element includes a filter membrane and a filter support frame, the filter support frame is fixed inside the filter tube body, and the filter membrane is fixed on the filter support frame.

[0012] As a further embodiment of this utility model: the inner wall of the detachable connecting cover is provided with an internal connecting thread, the filter tube body corresponding to the output end of the straight pipe is provided with an external connecting thread that mates with the internal connecting thread, and a sealing mating part is provided between the detachable connecting cover and the filter support frame.

[0013] As a further embodiment of this utility model: the sealing coupling includes a coupling sleeve, a boss, and a sealing gasket. The coupling sleeve is fixedly connected to the filter support frame. The boss is fixedly disposed on the inner side of the detachable connecting cover, and the coupling sleeve fits onto the boss. The sealing gasket fits onto both the coupling sleeve and the detachable connecting cover.

[0014] As a further embodiment of this utility model: the detachable connecting cover is provided with an external threaded connector on the side near the corresponding control valve, and the control valve near the detachable connecting cover is provided with a second internal thread that mates with the external threaded connector. The external threaded connector is provided with an annular groove on the side near the detachable connecting cover, and a rubber ring is fitted on the annular groove.

[0015] As a further embodiment of this utility model: each of the control valves includes a valve body and a knob, the valve body having a receiving cavity that is rotatably connected to the knob, and the knob having a transverse channel.

[0016] As a further embodiment of this utility model: a convex ring is provided on the knob, and a limiting groove that cooperates with and connects with the convex ring is provided on the inner wall of the receiving cavity.

[0017] As a further embodiment of this utility model: the blood collection and reinfusion device includes a constant temperature storage container and a centrifugal pump, the constant temperature storage container is connected to a bypass pipe, and the centrifugal pump is installed in the constant temperature storage container.

[0018] As a further embodiment of this utility model, the inner walls of the three-way valve, the filter assembly, and the control valve are all coated with an anti-condensation coating.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model controls the opening and closing of two control valves on the straight pipe of the three-way valve, so that the aspirated blood first passes through the first set of filter components and enters the blood collection and reinfusion device for storage, and then is transported through the second set of filter components by the centrifugal pump in the blood collection and reinfusion device, and then returned to the human body, thereby reducing the patient's blood loss.

[0021] 2. This utility model has two sets of filter components to filter the aspirated blood twice, ensuring blood quality. Compared with only one set of filter components for continuous multiple filtrations, it can effectively prevent blockage. In addition, the filter component near the output end of the straight tube is connected by a detachable connecting cover, which makes it easy to remove the filter component at this location and clean the filtered blood clots and blood impurities.

[0022] 3. The blood collection and reinfusion device of this utility model heats and keeps the stored blood at a temperature suitable for the human body by setting a constant temperature storage container, thus avoiding blood loss during reinfusion. It also relies on a centrifugal pump to maintain the blood reinfusion flow rate, thereby achieving safe blood reinfusion.

[0023] 4. This utility model prevents the returned blood from clotting and forming new thrombi by coating the inner walls of the three-way valve, filter assembly and control valve with an anticoagulant coating. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a structural diagram showing the relative positions of the knob and the detachable connecting cover in this utility model;

[0027] Figure 3 This is an exploded view of the parts that mate between the detachable connecting cover and the corresponding filter tube in this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of the filter tube in this utility model;

[0029] Figure 5 This is a schematic diagram of the filter support frame in this utility model;

[0030] Figure 6 This is a schematic diagram of the detachable connecting cover in this utility model;

[0031] Figure 7 This is a schematic diagram of the valve body in this utility model;

[0032] Figure 8 This is a schematic diagram of the knob in this utility model.

[0033] In the diagram: 1. Filter tube body; 1.1. External thread; 1.2. Pagoda head one; 1.3. Receiving cavity; 2. Filter membrane; 3. Filter support frame; 3.1. Hollow hole; 3.2. Connecting sleeve; 4. Sealing gasket; 5. Detachable connecting cover; 5.1. External thread connector; 5.2. Internal thread one; 5.3. Annular groove; 5.4. Boss; 6. Valve body; 6.1. Pagoda head two; 6.2. Receiving cavity; 6.3. Limiting groove; 6.4. Internal thread two; 7. Knob; 7.1. Raised ring; 7.2. Channel; 8. Rubber ring; 9. Blood collection and reinfusion device; 10. Straight tube; 11. Bypass tube; 12. Thrombus negative pressure aspiration device. Detailed Implementation

[0034] 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.

[0035] like Figures 1-8 As shown, a blood reinfusion system used in conjunction with a thrombus aspiration device includes a three-way valve. The three-way valve includes a straight pipe 10 and a bypass pipe 11 connected to one side of the straight pipe 10. One end of the straight pipe 10 of the three-way valve is a suction end, which is used to connect to a thrombus negative pressure aspiration device 12. The thrombus negative pressure aspiration device 12 can be a medical negative pressure pump. Its negative pressure end is connected to the corresponding position in the human body through a suction catheter, and then the thrombus is aspirated. The other end of the straight pipe 10 is an output end, which is used to connect to the blood return pathway system in the human body, and is used to return the filtered blood after the thrombus has been removed to the human body.

[0036] The blood reinfusion system also includes a filter assembly for filtering thrombi and a blood collection and reinfusion device 9. There are two sets of filter assemblies, which are respectively set at both ends of the straight tube 10. They are used to filter thrombi twice to avoid excessive accumulation of thrombi and blockage caused by multiple filtrations by a single filter assembly. The two sets of filter assemblies can be set with different sizes of filter holes according to actual needs to ensure the quality of reinfused blood. A detachable connecting cover 5 for disassembling and assembling the corresponding filter assembly is set near the output end of the straight tube 10. Since the blood flows from the inside of the straight tube 10 to the outside through the corresponding filter assembly, the filtered thrombi are inside the straight tube 10 and are not easy to clean directly. Therefore, a detachable connecting cover 5 is set to facilitate the removal and cleaning of the filter assembly at this location. The filter assembly near the suction end has its filter side facing outward. When cleaning is required, the thrombi negative pressure suction device 12 connected to the suction end of the straight tube 10 can be removed.

[0037] The blood collection and reinfusion device 9 is connected to the bypass pipe 11. Control valves are installed at both ends of the straight pipe 10. One control valve controls the on / off state between the blood collection and reinfusion device 9 and the suction end of the straight pipe 10, while the other control valve controls the on / off state between the blood collection and reinfusion device 9 and the output end of the straight pipe 10. Thus, when aspirating thrombi, the control valve between the blood collection and reinfusion device 9 and the suction end of the straight pipe 10 is first opened, and the control valve between the blood collection and reinfusion device 9 and the output end of the straight pipe 10 is closed. This allows the aspirated blood to be temporarily stored in the blood collection and reinfusion device 9 after being filtered by the first set of filter components. Then, the control valve between the blood collection and reinfusion device 9 and the suction end of the straight pipe 10 is closed, and the control valve between the blood collection and reinfusion device 9 and the output end of the straight pipe 10 is opened, returning the filtered blood to the body. At this point, the blood passes through the second set of filter components for secondary filtration, ensuring the quality of the reinfused blood.

[0038] In some specific implementation plans, such as Figure 3 As shown, each filter assembly includes a filter tube body 1 and a filter element. The filter tube body 1 is provided with a pagoda head 1.2 for fixing and connecting the pipeline, and the suction end of the straight pipe 10 and the end of the bypass pipe 11 are both provided with a pagoda head 6.1 for fixing and connecting the pipeline. The filter element is located inside the filter tube body 1. The inner side of the filter tube body 1 is provided with a receiving cavity 1.3 to accommodate the filter element. The receiving cavity 1.3 also facilitates the accommodating of blood impurities and thrombi filtered during use.

[0039] The filter element includes a filter membrane 2 and a filter support frame 3. The filter support frame 3 is fixed inside the filter tube 1 by adhesive. The filter membrane 2 is bonded to the filter support frame 3. The filter membrane 2 and the filter support frame 3 are shaped to match each other. The filter membrane 2 has mesh holes. When blood flows through the filter tube 1, the filter membrane 2 is used to filter blood clots. The filter support frame 3 is provided with perforated holes 3.1 to facilitate the flow of filtered blood.

[0040] In some specific implementations, since the thrombi and impurities filtered by the filter assembly at the output end of the straight-through tube 10 are located on the inward side of the tube body, in order to facilitate the disassembly and cleaning of the filter assembly at the output end of the straight-through tube 10, combined with... Figures 3 to 5 As shown, the inner wall of the detachable connecting cover 5 is provided with an internal thread 5.2, and the filter tube 1 corresponding to the output end of the straight pipe 10 is provided with an external thread 1.1 that mates with the internal thread 5.2. A sealing mating part is provided between the detachable connecting cover 5 and the filter support frame 3.

[0041] The sealing assembly includes a mating sleeve 3.2, a boss 5.4, and a sealing gasket 4. The mating sleeve 3.2 is fixedly connected to the filter support frame 3. The boss 5.4 is fixedly installed inside the detachable connecting cover 5. The boss 5.4 is cylindrical and its diameter is smaller than the inner diameter of the detachable connecting cover 5. The mating sleeve 3.2 fits onto the boss 5.4. The sealing gasket 4 fits onto the mating sleeve 3.2 and the detachable connecting cover 5. That is, when the filter tube 1 is connected to the detachable connecting cover 5 via the external thread 1.1, the mating sleeve 3.2 on the filter support frame 3 fits onto the boss 5.4, and the sealing gasket 4 fits onto the boss 5.4. Finally, the end edge of the mating sleeve 3.2 presses the sealing gasket 4 against the inside of the detachable connecting cover 5, which facilitates sealing.

[0042] In some specific implementations, in order to ensure that the control valves adjacent to the detachable connecting cover 5 can be disassembled and assembled, combined with Figure 6 and Figure 7 As shown, the detachable connecting cover 5 has an external threaded connector 5.1 on the side near the corresponding control valve. The control valve near the detachable connecting cover 5 has a connecting internal thread 6.4 that mates with the external threaded connector 5.1. This allows the detachable connecting cover 5 to be disassembled and assembled independently. The external threaded connector 5.1 has an annular groove 5.3 on the side near the detachable connecting cover 5. A rubber ring 8 is fitted on the annular groove 5.3. When the detachable connecting cover 5 is assembled and connected to the corresponding control valve via the external threaded connector 5.1 and the connecting internal thread 6.4, the rubber ring 8 at the position of the annular groove 5.3 is pressed between the detachable connecting cover 5 and the control valve to ensure a tight seal after connection.

[0043] In some specific implementation plans, combined with Figure 7 and Figure 8 As shown, each control valve includes a valve body 6 and a knob 7. The valve body 6 has a receiving cavity 6.2 that mates with the knob 7. The knob 7 can rotate within the receiving cavity 6.2. A channel 7.2 is provided laterally on the knob 7. By rotating the knob 7, the channel 7.2 is aligned with or offset from the straight pipe 10 to control the on / off state. A protruding ring 7.1 is provided on the knob 7. A limiting groove 6.3 is provided on the inner wall of the receiving cavity 6.2 that mates with the protruding ring 7.1. The connection between the limiting groove 6.3 and the protruding ring 7.1 can prevent the knob 7 from detaching from the valve body 6.

[0044] In some specific implementations, to control the blood reinfusion rate and temperature, the blood collection and reinfusion device 9 includes a constant temperature storage container and a centrifugal pump. The constant temperature storage container is connected to a bypass pipe 11 via a pipeline, allowing the aspirated blood to be temporarily stored in the constant temperature storage container. The constant temperature storage container can be a variable temperature water tank control device, and the temperature of the stored blood can be set to 37°C through a matching temperature control system. The centrifugal pump is installed in the constant temperature storage container, and the output end of the centrifugal pump is also connected to the bypass pipe 11 via a pipeline. The centrifugal pump is equipped with a controller, which controls the operating parameters of the centrifugal pump to ensure that the blood flow rate is 20 cm / s, thereby facilitating the safe return of blood to the human body at an appropriate temperature and flow rate.

[0045] In addition, since air bubbles or excessively fast flow rates may be generated during blood reinfusion, sensors are installed at the output end of the centrifugal pump to monitor air bubbles and flow rate in real time.

[0046] In some specific implementations, to prevent the returned blood from clotting and forming new thrombi, the inner walls of the three-way valve, filter assembly, and control valve are coated with an anticoagulant coating, which may be a heparin material layer or a phosphocholine material layer.

[0047] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios:

[0048] During thrombus aspiration, the control valve between the blood collection and reinfusion device 9 and the thrombus negative pressure aspiration device 12 at the aspiration end of the straight tube 10 is first opened, and the control valve between the blood collection and reinfusion device 9 and the blood return pathway system at the output end of the straight tube 10 is closed. Then, the blood at the location of the thrombus in the human body is aspirated through the thrombus negative pressure aspiration device 12. The aspirated blood first passes through the first set of filter components to achieve thrombus filtration, and then enters the blood collection and reinfusion device 9 for temporary storage. The blood collection and reinfusion device 9 is set to control the temperature of the stored blood at 37°C through the matching temperature control system.

[0049] After aspiration is complete, close the control valve between the blood collection and reinfusion device 9 and the thrombus negative pressure aspiration device 12 at the aspiration end of the straight tube 10, and open the control valve between the blood collection and reinfusion device 9 and the blood return pathway system at the output end of the straight tube 10. Then, control the operating parameters of the centrifugal pump in the blood collection and reinfusion device 9 through the controller so that the blood flow rate delivered by the centrifugal pump is 20cm / s, thereby facilitating the safe return of blood to the human body at an appropriate temperature and flow rate.

[0050] When blood flows back into the human body through the output end of the straight tube 10, it undergoes secondary filtration through the second set of filter components to ensure the quality of the reinfused blood. Furthermore, by setting filter components at both ends of the straight tube 10 to filter the blood sequentially, it avoids excessive accumulation of blood clots and blockage caused by continuous filtration by a single filter component. The two sets of filter components can be set with different sizes of filter holes according to actual needs to ensure the quality of the reinfused blood.

[0051] Since the thrombi and impurities filtered by the filter assembly at the output end of the straight tube 10 are located on the inner side of the tube body, in order to facilitate the disassembly and cleaning of the filter assembly at the output end of the straight tube 10, the filter tube body 1 of the filter assembly at this location is connected to the detachable connecting cover 5 by a threaded connection, which can be directly unscrewed when disassembling.

[0052] The foregoing has described several embodiments of this utility model in detail, but these embodiments are not limited thereto and should not be considered as limiting the scope of this utility model. All equivalent changes and improvements made within the scope of the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A blood reinfusion system for use with a thrombus aspiration device, comprising a three-way valve, the three-way valve including a straight pipe (10) and a bypass pipe (11), one end of the straight pipe (10) being an aspiration end and the other end being an output end, characterized in that, Also includes: The filter assembly for filtering blood clots is provided in two sets, which are respectively located at both ends of the straight tube (10). The straight tube (10) is provided with a detachable connecting cover (5) for assembling and disassembling the corresponding filter assembly near the output end. The blood collection and reinfusion device (9) is connected to the bypass pipe (11). Both ends of the straight pipe (10) are equipped with control valves. One control valve is used to control the on / off state between the blood collection and reinfusion device (9) and the suction end of the straight pipe (10), and the other control valve is used to control the on / off state between the blood collection and reinfusion device (9) and the output end of the straight pipe (10).

2. A blood reinfusion system for use with a thrombus aspiration device according to claim 1, characterized in that, Each of the filter components includes a filter tube (1) and a filter element, the filter element being disposed inside the filter tube (1).

3. A blood reinfusion system for use with a thrombus aspiration device according to claim 2, characterized in that, The filter element includes a filter membrane (2) and a filter support frame (3). The filter support frame (3) is fixed inside the filter tube (1), and the filter membrane (2) is fixed on the filter support frame (3).

4. A blood reinfusion system for use with a thrombus aspiration device according to claim 3, characterized in that, The inner wall of the detachable connecting cover (5) is provided with an internal thread (5.2), and the filter tube (1) corresponding to the output end of the straight pipe (10) is provided with an external thread (1.1) that is connected to the internal thread (5.2). A sealing joint is provided between the detachable connecting cover (5) and the filter support frame (3).

5. A blood reinfusion system for use with a thrombus aspiration device according to claim 4, characterized in that, The sealing fitting includes a fitting body (3.2), a boss (5.4), and a sealing gasket (4). The fitting body (3.2) is fixedly connected to the filter support frame (3). The boss (5.4) is fixedly disposed inside the detachable connecting cover (5), and the fitting body (3.2) fits onto the boss (5.4). The sealing gasket (4) fits onto the fitting body (3.2) and the detachable connecting cover (5).

6. A blood reinfusion system for use with a thrombus aspiration device according to claim 1, characterized in that, The detachable connecting cover (5) is provided with an external threaded connector (5.1) on the side near the corresponding control valve. The control valve near the detachable connecting cover (5) is provided with a connecting internal thread (6.4) that mates with the external threaded connector (5.1). The side of the external threaded connector (5.1) near the detachable connecting cover (5) is provided with an annular groove (5.3), and a rubber ring (8) is fitted on the annular groove (5.3).

7. A blood reinfusion system for use with a thrombus aspiration device according to claim 1, characterized in that, Each of the control valves includes a valve body (6) and a knob (7). The valve body (6) has a receiving cavity (6.2) that is rotatably connected to the knob (7). The knob (7) has a transverse channel (7.2).

8. A blood reinfusion system for use with a thrombus aspiration device according to claim 7, characterized in that, The knob (7) is provided with a protruding ring (7.1), and the inner wall of the receiving cavity (6.2) is provided with a limiting groove (6.3) that cooperates with and connects to the protruding ring (7.1).

9. A blood reinfusion system for use with a thrombus aspiration device according to claim 1, characterized in that, The blood collection and reinfusion device (9) includes a constant temperature storage container and a centrifugal pump. The constant temperature storage container is connected to a bypass pipe (11), and the centrifugal pump is installed in the constant temperature storage container.

10. A blood reinfusion system for use with a thrombus aspiration device according to claim 1, characterized in that, The inner walls of the three-way valve, filter assembly, and control valve are all coated with an anti-condensation coating.

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