CN218325345U - Blood pump circulation test system with exhaust function - Google Patents
Blood pump circulation test system with exhaust function Download PDFInfo
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- CN218325345U CN218325345U CN202222542091.4U CN202222542091U CN218325345U CN 218325345 U CN218325345 U CN 218325345U CN 202222542091 U CN202222542091 U CN 202222542091U CN 218325345 U CN218325345 U CN 218325345U
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Abstract
The utility model aims at providing a blood pump circulation test system that has an exhaust function that can reduce bubble volume, the export of blood storage ware communicates with each other through the entry of first pipeline with the blood pump, and the entry of blood storage ware communicates with each other through the export of second pipeline with the blood pump, has seted up the sample connection on the second pipeline, and the upper portion of blood storage ware still is provided with the gas vent, is provided with the flush fluid pipeline between the entry of blood pump and the export, the flush fluid pipeline be independent of outside the circulation return circuit that blood storage ware, blood pump constitute. Before whole circulation system work, at first be linked together blood pump and flush fluid pipeline, utilize the bubble discharge of the entrance and exit of flush fluid with blood pump casing and pump, treat that the bubble is discharged later with blood pump and flush fluid pipeline disconnection and insert whole test system again, after whole system operation a period, just there is not the existence of bubble in the whole system, and blood flows unblocked, and the result degree of accuracy that takes a sample to detect from the sampling mouth is high.
Description
Technical Field
The utility model relates to a ventricle auxiliary pump blood technical field, concretely relates to blood pump circulation test system with exhaust function.
Background
With the development of cardiac surgery and the shortage of heart transplant donors, a ventricular assist device has become the mainstream trend of treating heart failure, and the centrifugal magnetic suspension blood pump is widely concerned with the advantages of small volume, simple structure, no mechanical friction, no need of lubrication and the like; however, any impeller blood pump can cause damage to blood, and when the impeller rotates at high speed, red blood cells can be damaged to cause hemoglobin to be dissociated into blood plasma, which is called blood loss, and the phenomenon can cause physiological disorder of a receptor, and is seriously or even life-threatening. Hemolysis is one of important parameters for evaluating damage of red blood cells caused by a blood pump, and the hemolysis caused by the blood pump only depends on the design, the structure and the used materials of the blood pump, so that the hemolysis caused by the blood pump is very necessary to be tested in the development stage.
The utility model application named as 'an in vitro hemolysis experiment testing device of self-made blood pump' (publication number: CN 106943637A) discloses the following technical proposal: as shown in fig. 1, the blood temperature control device comprises a blood reservoir 1, a temperature control box 2, a connecting pipeline 3, a pressure sensor 4, an ultrasonic flowmeter 5, a temperature probe 6, a damping valve 7, an exhaust valve 8 and a self-made blood pump 9; the extracorporeal circulation test of the blood pump is smoothly carried out by controlling the inlet and outlet pressure and the rotating speed of the self-made blood pump and reasonably selecting and using a detection device which can not damage blood, and the damage degree of the whole device to blood is ensured to be minimum. However, in the above system, the exhaust valve 8 is provided at the upper portion of the blood reservoir 1, and the connecting tube 3 is long (about 2 m), and microbubbles (microbubbles are small bubbles having a diameter of several micrometers and have small buoyancy) in the connecting tube 3 are hardly moved to the upper portion of the blood reservoir 1 and discharged. Meanwhile, experiments show that the largest amount of bubbles is in the shell of the blood pump and the position where the inlet and the outlet of the blood pump are connected with the connecting pipeline, and the bubbles at the position can hardly be discharged because the blood pump is far away from the exhaust valve 8, so that too many bubbles are doped in the blood and can not be discharged all the time, the pumping of the blood can be influenced, and the accuracy of a sampling result is further influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a blood pump circulation test system that has an exhaust function that can reduce the bubble volume.
In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a blood pump circulation test system with exhaust function, includes blood reservoir, and blood reservoir's export communicates with each other through the entry of first pipeline with the blood pump, and blood reservoir's entry communicates with each other through the export of second pipeline with the blood pump, has seted up the sample connection on the second pipeline, and blood reservoir's upper portion still is provided with the gas vent, is provided with the washing liquid pipeline between blood pump's entry and the export, the washing liquid pipeline be independent of outside the circulation return circuit that blood reservoir, blood pump constitute.
The flushing liquid pipeline comprises an inlet and an outlet of the blood pump, a first reversing valve and a second reversing valve are respectively arranged at the inlet and the outlet of the blood pump, the inlet of the blood pump is controlled by the first reversing valve to be communicated with the first pipeline or communicated with a flushing pipeline of the flushing liquid pipeline, and the outlet of the blood pump is controlled by the second reversing valve to be communicated with the second pipeline or the flushing pipeline of the flushing liquid pipeline.
The first reversing valve is arranged on a first pipeline close to an inlet of the blood pump, the second reversing valve is arranged on a second pipeline close to an outlet of the blood pump, and a bubble sensor is arranged on the second pipeline between the second reversing valve and the blood pump.
The first reversing valve and the second reversing valve are identical in structure, the first reversing valve is a two-position three-way reversing valve, two connectors of the first reversing valve are respectively connected with the first pipeline, and the other connector of the first reversing valve is connected with the flushing pipeline.
The flushing pipelines on the two reversing valves are respectively communicated with the inlet and the outlet of the flushing liquid tank, and the upper part of the flushing liquid tank is also provided with an exhaust valve.
The washing solution is physiological saline, heparin or blood.
The sampling port is arranged on the second pipeline close to the inlet of the blood reservoir.
And a damping valve is arranged on a second pipeline between the second reversing valve and the sampling port.
An ultrasonic flowmeter and a pressure sensor are arranged on a first pipeline between the first reversing valve and the outlet of the blood reservoir, and a pressure sensor is arranged on a second pipeline between the second reversing valve and the damping valve.
The blood storage device is arranged in the temperature control box, and a ventricle simulation device is also arranged on the blood storage device.
Among the above-mentioned scheme, before whole circulation system work, at first be linked together blood pump and flush fluid pipeline, utilize the flush fluid with the bubble discharge of the entrance and exit of blood pump casing and pump, treat that the bubble is discharged later with blood pump and flush fluid pipeline disconnection and insert whole test system again, after whole system operation a period, just there is not the existence of bubble in the whole system, blood flow is unblocked, and the result degree of accuracy that takes a sample to detect from the sampling mouth is high.
Drawings
FIG. 1 is a schematic diagram of a test system in the prior art;
fig. 2 is a schematic structural diagram of embodiment 1 in the test system of the present invention;
fig. 3 is a schematic structural diagram of embodiment 2 in the test system of the present invention.
Detailed Description
As shown in fig. 2 and 3, a blood pump circulation test system with an exhaust function includes a blood reservoir 10, an outlet of the blood reservoir 10 is communicated with an inlet of a blood pump 30 through a first pipeline 21, an inlet of the blood reservoir 10 is communicated with an outlet of the blood pump 30 through a second pipeline 22, the blood reservoir 10 adjusts an inlet pressure of the blood pump 30 by adjusting a liquid level, a sampling port 26 is opened on the second pipeline 22, an exhaust port 11 is further provided on an upper portion of the blood reservoir 10 to reduce damage of red blood cells caused by bubbles and influence of a test result of the whole test system of the bubbles, a flushing liquid pipeline 40 is provided between the inlet and the outlet of the blood pump 30, and the flushing liquid pipeline 40 is independent of a circulation loop formed by the blood reservoir 10 and the blood pump 30. The test system works as follows: because the most amount of bubbles is the part where the shell of the blood pump 30 and the inlet and outlet of the blood pump 30 are connected with the first pipeline 21 and the second pipeline 22, before the whole system works, the blood pump 30 is firstly communicated with the flushing liquid pipeline 40, bubbles at the outlet and inlet of the shell of the blood pump 30 and the pump thereof are discharged by utilizing the flushing liquid, after the bubbles are discharged, the blood pump 30 is disconnected from the flushing liquid pipeline 40 and is connected to the whole test system, no bubbles are generated in the shell of the pump 30 and the inlet and outlet of the blood pump 30, other parts are close to the exhaust port 11 at the upper part of the blood reservoir 10, and a small amount of generated bubbles can enter the blood reservoir 10 along with blood due to the action of buoyancy and are discharged from the exhaust port 11. After the whole system runs for a period of time, no air bubbles exist in the whole system, the blood flow is smooth, and the accuracy of the result of sampling detection from the sampling port 26 is high.
In order to realize the switching of the blood pump 30 between the flushing liquid pipeline 40 and the whole circulation system, the flushing liquid pipeline 40 comprises an inlet and an outlet of the blood pump 30, which are respectively provided with a first reversing valve 41 and a second reversing valve 42, the first reversing valve 41 controls the inlet of the blood pump 30 to be communicated with the first pipeline 21 or communicated with a flushing pipeline 43 of the flushing liquid pipeline 40, and the second reversing valve 42 controls the outlet of the blood pump 30 to be communicated with the second pipeline 22 or communicated with the flushing pipeline 43 of the flushing liquid pipeline 40.
As a preferred scheme of the utility model, the first reversing valve 41 is arranged on the first pipeline 21 close to the inlet of the blood pump 30, and the second reversing valve 42 is arranged on the second pipeline 22 close to the outlet of the blood pump 30. By using a part of the piping close to the first and second piping 21, 22 as the piping section common to the flushing liquid line 40 and the entire system under test, the rewiring step is eliminated, and only the control of the change-over valve is required to communicate the common piping section with the first and second piping 21, 22 or the common piping section with the flushing piping 43, and the second piping 22 between the second change-over valve 42 and the blood pump 30 is provided with a bubble sensor 46 for detecting bubbles in the flushing liquid circuit.
Example 1
As shown in fig. 2, the first direction valve 41 and the second direction valve 42 have the same structure, and the first direction valve 41 is a two-position three-way direction valve, two ports of which are respectively connected with the first pipe 21, and the other port of which is connected with the flushing pipe 43. In this embodiment the flushing liquid is fed directly from one flushing pipe 43 and discharged from the other flushing pipe 43, which is simple in construction, but the amount of flushing liquid required is relatively large.
Example 2
The flushing pipes 43 on the two reversing valves are respectively communicated with the inlet and the outlet of the flushing liquid tank 44, and the upper part of the flushing liquid tank 44 is also provided with an exhaust valve 45. As shown in fig. 3, unlike in example 1, in this example, the rinse liquid constitutes an internal circulation circuit, and bubbles carried out are discharged from an exhaust valve 45 provided also in the upper part of the rinse liquid tank 44, so that the amount of the rinse liquid required is small.
The flushing fluid is normal saline, heparin or blood, and only air bubbles in the blood pump 30 and at the inlet and the outlet of the blood pump can be emptied, blood is preferred, and the influence of partial residual of other flushing fluids on the accuracy of blood component testing is avoided.
The sampling port 26 is disposed on the second conduit 22 near the inlet of the blood reservoir 10, where the parameters of the blood are closer to the parameters of the blood pumped into the aorta via the blood pump 20 during the actual application process, so that the sampling result is true and reliable.
The second pipeline 22 between the second reversing valve 42 and the sampling port 26 is provided with a damping valve 23, and the outlet pressure of the blood pump 30 is adjusted by adjusting the opening degree of the damping valve.
Further, an ultrasonic flow meter 24 and a pressure sensor 25 are provided in the first pipe 21 between the first direction changing valve 41 and the outlet of the blood reservoir 10, and a pressure sensor 25 is provided in the second pipe 22 between the second direction changing valve 42 and the damper valve 23. The ultrasonic flowmeter 24 is a non-contact instrument, can measure the medium flow of a large pipe diameter and can also be used for measuring a medium which is not easy to contact and observe, has high measurement accuracy, is hardly interfered by various parameters of the measured medium, and has a signal digital processing technology, so that the instrument measurement signal is more stable, the anti-interference capability is strong, and the measurement is more accurate; on the other hand, no mechanical transmission part is arranged in the device, so that the device is not easy to damage, free of maintenance and high in reliability. Two pressure sensors 25 measure the outlet pressure difference of the blood pump 30.
The blood storage device 10 is placed in the temperature control box 50, the temperature of the temperature control box 50 is set to be 37 ℃, and the blood storage device 10 is further provided with a ventricle simulation device for simulating the pressure generated during the heartbeat, so that the whole test environment is closer to the real use environment.
Claims (10)
1. The utility model provides a blood pump circulation test system with exhaust function, includes blood reservoir (10), the export of blood reservoir (10) communicates with each other through the entry of first pipeline (21) and blood pump (30), and the entry of blood reservoir (10) communicates with each other through the export of second pipeline (22) and blood pump (30), has seted up sample connection (26) on second pipeline (22), and the upper portion of blood reservoir (10) still is provided with gas vent (11), its characterized in that: a flushing liquid pipeline (40) is arranged between the inlet and the outlet of the blood pump (30), and the flushing liquid pipeline (40) is independent of the circulation loop formed by the blood reservoir (10) and the blood pump (30).
2. The blood pump flow testing system with an exhaust function of claim 1, characterized in that: the flushing liquid pipeline (40) comprises an inlet and an outlet of a blood pump (30), and is respectively provided with a first reversing valve (41) and a second reversing valve (42), the first reversing valve (41) controls the inlet of the blood pump (30) to be communicated with the first pipeline (21) or communicated with a flushing pipeline (43) of the flushing liquid pipeline (40), and the second reversing valve (42) controls the outlet of the blood pump (30) to be communicated with the second pipeline (22) or communicated with the flushing pipeline (43) of the flushing liquid pipeline (40).
3. The blood pump flow testing system with an exhaust function of claim 2, characterized in that: the first reversing valve (41) is arranged on a first pipeline (21) close to the inlet of the blood pump (30), the second reversing valve (42) is arranged on a second pipeline (22) close to the outlet of the blood pump (30), and a bubble sensor (46) is arranged on the second pipeline (22) between the second reversing valve (42) and the blood pump (30).
4. The blood circulation test system with an exhaust function according to claim 2 or 3, wherein: the first reversing valve (41) and the second reversing valve (42) are identical in structure, the first reversing valve (41) is a two-position three-way reversing valve, two connectors of the two-position three-way reversing valve are respectively connected with the first pipeline (21), and the other connector of the two-position three-way reversing valve is connected with the flushing pipeline (43).
5. The blood pump flow testing system with an exhaust function of claim 4, wherein: the flushing pipelines (43) on the two reversing valves are respectively communicated with the inlet and the outlet of the flushing liquid tank (44), and the upper part of the flushing liquid tank (44) is also provided with an exhaust valve (45).
6. The blood pump flow testing system with an exhaust function of claim 1, characterized in that: the washing solution is physiological saline, heparin or blood.
7. The blood pump flow-through testing system with an exhaust function according to claim 1, characterized in that: the sampling port (26) is disposed in the second conduit (22) adjacent the inlet of the reservoir (10).
8. The blood pump flow-through testing system with an exhaust function according to claim 2, characterized in that: a damping valve (23) is arranged on the second pipeline (22) between the second reversing valve (42) and the sampling port (26).
9. The blood pump flow testing system with an exhaust function of claim 2, characterized in that: an ultrasonic flowmeter (24) and a pressure sensor (25) are arranged on a first pipeline (21) between the first reversing valve (41) and the outlet of the blood reservoir (10), and a pressure sensor (25) is arranged on a second pipeline (22) between the second reversing valve (42) and the damping valve (23).
10. The blood pump flow-through testing system with an exhaust function according to claim 1, characterized in that: the blood storage device (10) is arranged in the temperature control box (50), and a ventricle simulation device is also arranged on the blood storage device (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222542091.4U CN218325345U (en) | 2022-09-26 | 2022-09-26 | Blood pump circulation test system with exhaust function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222542091.4U CN218325345U (en) | 2022-09-26 | 2022-09-26 | Blood pump circulation test system with exhaust function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218325345U true CN218325345U (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222542091.4U Active CN218325345U (en) | 2022-09-26 | 2022-09-26 | Blood pump circulation test system with exhaust function |
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| Country | Link |
|---|---|
| CN (1) | CN218325345U (en) |
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2022
- 2022-09-26 CN CN202222542091.4U patent/CN218325345U/en active Active
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