A flushing pressurizing device for an interventional ventricular assist, a flushing system and a quantitative pressurizing method

Abstract

The application discloses a kind of flushing pressurizing device and flushing system for intervention type ventricular assistance, including pressurizing conduit, pressure diaphragm and inflation valve, pressurizing conduit is provided with flushing inlet and flushing outlet, pressure diaphragm is arranged in the inner wall of pressurizing conduit, cavity is formed between pressure diaphragm and the inner wall of pressurizing conduit, inflation valve is arranged in the outer wall of pressurizing conduit and can control the expansion and contraction of pressure diaphragm, and inflation valve is communicated with cavity.By inflation valve control elastic pressure diaphragm's expansion state, to accurately change the volume of pressurizing conduit pipeline, realize the quantitative control of output pressure after pressurization, so as to realize the quantitative and accurate control of flushing pressure, inhibit the reflux disturbance of flushing process.The quantitative pressurizing method of the application first adjusts the output power of peristaltic pump and the pressure of flushing pressurizing device, then adjusts the flushing pressurizing device to reach the set tolerance value, and finally adjusts the output power of peristaltic pump, to ensure that the set flow meets the requirements.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an interventional ventricular assist device for flushing and pressurization, a flushing system, and a quantitative pressurization method. Background Technology

[0002] Interventional left ventricular assist systems typically involve percutaneously implanting a miniature axial flow pump into the body. The pump's inlet is placed in the left ventricle, and its outlet is placed in the aorta. When the miniature axial flow pump operates, blood is drawn from the left ventricle and transported to the ascending aorta. However, blood can flow through the bearing gaps into the motor, potentially causing hemolysis and thrombosis. To prevent blood from flowing back into the motor through the bearing gaps during operation, a flushing fluid at a specific flow rate higher than the blood pressure is typically injected into the motor. However, insufficient or unstable reverse pressure often leads to blood flowing back into the bearing and motor gaps during normal operation of the miniature catheter pump, resulting in serious medical accidents such as hemolysis and thrombosis. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the prior art, the purpose of this invention is to provide an interventional ventricular assist device for flushing and pressurization, a flushing system and a quantitative pressurization method, which can achieve quantitative and precise control of flushing pressure and suppress backflow disturbances in the flushing process.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an interventional ventricular assist device for flushing and pressurization, comprising: A pressurization conduit, wherein the pressurization conduit is provided with a flushing inlet and a flushing outlet; A pressure diaphragm is disposed on the inner wall of the pressurization conduit, and a cavity is formed between the pressure diaphragm and the inner wall of the pressurization conduit. An inflation valve is provided on the outer wall of the pressurization conduit and can control the expansion and contraction of the pressure diaphragm, and the inflation valve is connected to the cavity.

[0005] As a further improvement of the present invention, the inner diameter of the flushing inlet is larger than the inner diameter of the flushing outlet.

[0006] As a further improvement of the present invention, the cross-section of the pressure diaphragm is arc-shaped.

[0007] As a further improvement of the present invention, the pressurizing conduit includes an integrally formed pressurizing end, a tapered end and an output end connected in sequence, the flushing inlet is located on the side of the pressurizing end away from the output end, and the flushing outlet is located on the side of the output end away from the pressurizing end.

[0008] As a further improvement of the present invention, the inner diameter of the boosting end is larger than the inner diameter of the output end, and the inner diameter of the tapering end gradually changes from the inner diameter of the boosting end to the inner diameter of the output end.

[0009] As a further improvement of the present invention, the pressure diaphragm is provided as a plurality of diaphragms, which are arranged in a circumferential array along the inner peripheral wall of the pressurization end.

[0010] As a further improvement of the present invention, the pressure diaphragm is arranged in a ring on the inner peripheral wall of the pressurization end.

[0011] As a further improvement of the present invention, two pressure diaphragms are provided and symmetrically arranged on the inner peripheral wall of the pressurization end.

[0012] As a further improvement of the present invention, a three-way connector is provided at the end of the flushing outlet away from the output end.

[0013] A flushing system, comprising: A flushing booster device, wherein the flushing outlet of the flushing booster device is connected to a conduit pump via a first pipeline; An infusion bag, wherein the infusion bag is connected to the flushing inlet of a flushing and pressurizing device via a second pipeline; A switching valve is installed on the second pipeline between the infusion bag and the flushing and pressurizing device to control the flow and shut-off of the liquid in the infusion bag; A peristaltic pump is installed on the second pipeline between the switching valve and the flushing and pressurizing device, and is used to pump the liquid in the infusion bag that flows through the second pipeline, the flushing and pressurizing device and the first pipeline in sequence to the conduit pump; The detection assembly includes a first pressure sensor for detecting the pressure before pressurization on a second pipeline disposed between the peristaltic pump and the flushing pressurization device, a second pressure sensor for detecting the pressure after pressurization on a first pipeline disposed between the flushing pressurization device and the conduit pump, and a flow sensor for detecting the liquid output flow rate.

[0014] As a further improvement of the present invention, it also includes a controller, which is electrically connected to the inflation valve, the switching valve, the first pressure sensor, the second pressure sensor and the flow sensor respectively.

[0015] As a further improvement of the invention, a display is also included, which is connected to the controller for displaying pressure and flow data detected by the detection component.

[0016] As a further improvement of the present invention, a one-way valve is provided on the first pipeline between the peristaltic pump and the flushing pressurization device.

[0017] A quantitative pressurization method includes the following steps: S1, preset expected pressure value P1, tolerance δ, expected output flow value Q1; S2. Open the switch valve and start the peristaltic pump. Adjust the output power of the peristaltic pump and the pressure of the flushing and pressurizing device. At this time, the first pressure sensor collects the pressure before pressurization Pin in real time, the second pressure sensor collects the pressure after pressurization Pout in real time, and the flow sensor collects the liquid output flow rate Q2 in real time. S3. When |Pout-Pin| / Pin≥k, where k∈[10,15], keep the peristaltic pump output power constant and adjust the pressure of the flushing booster device; S4. When |Pout-P1|<δ, where δ≤2%, keep the pressure of the flushing booster device constant and adjust the output power of the peristaltic pump. S5. When Q2=Q1, keep the peristaltic pump output power and the flushing booster pressure constant.

[0018] As a further improvement of the present invention, the following steps are included before step S2: S1-1. Open the switch valve and start the peristaltic pump. Adjust the pressure of the flushing booster device. Control the expansion of the pressure diaphragm through the air valve to increase the pressure of the pressure diaphragm until the output flow rate is 0. At this time, the flushing booster device is at the cut-off pressure, which is recorded as P2_0.

[0019] As a further improvement of the present invention, in steps S2 and S3, the pressure value of the flushing pressurization device is less than P2_0.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses an interventional ventricular assist device and flushing system. By controlling the expansion state of the elastic pressure diaphragm inside the boosting catheter through an inflation valve, the volume of the boosting catheter is precisely changed, thereby achieving quantitative control of the output pressure after boosting. This enables precise quantitative control of the flushing pressure, suppresses backflow disturbance during the flushing process, and avoids serious medical accidents such as hemolysis and thrombosis caused by blood flowing back into the gap between the bearing and the motor when the catheter pump is working normally.

[0021] The present invention provides a quantitative pressurization method, which first adjusts the output power of the peristaltic pump and the pressure of the flushing pressurization device, then adjusts the flushing pressurization device to reach the set tolerance value, and finally adjusts the output power of the peristaltic pump to ensure that the set flow rate meets the requirements. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the flushing system structure in this invention; Figure 2 This is a schematic diagram of the flushing and pressurization device in this invention; Figure 3 This is a cross-sectional view of the flushing and pressurizing device in the contracted state in this invention; Figure 4 This is a cross-sectional view of the flushing and pressurizing device in the expanded state in this invention; Figure 5 This is a two-section view of the flushing and pressurizing device in the expanded state in this invention; Figure 6 This is a flowchart illustrating the quantitative pressurization method of the present invention.

[0023] Attached Figure

[0024] Flushing and pressurizing device; 110. Pressurizing conduit; 1110. Flushing inlet; 1120. Flushing outlet; 1130. Pressurizing end; 1140. Converging end; 1150. Output end; 120. Pressure diaphragm; 130. Air inlet valve; 140. T-connector; IV bag; Switch valve; Peristaltic pump; Detection components; 510, first pressure sensor; 520, second pressure sensor; 530, flow sensor; duct pump; Controller; 800. Check valve; 900. Monitor; Pipeline A is the first pipe; Pipeline B is the second pipe. Implementation

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

[0026] Figures 2 to 5 The diagram shown is a structural schematic of an embodiment of an interventional ventricular assist flushing and pressurization device of the present invention, the main body of which includes a pressurization catheter 110, a pressure diaphragm 120 and an inflation valve 130.

[0027] The pressurization conduit 110 is provided with a flushing inlet 1110 and a flushing outlet 1120. Specifically, the pressurization conduit 110 includes an integrally formed pressurization end 1130, a tapered end 1140, and an output end 1150 connected in sequence. The flushing inlet 1110 is located on the side of the pressurization end 1130 away from the output end 1150, and the flushing outlet 1120 is located on the side of the output end 1150 away from the pressurization end 1130. In this embodiment, the pressurization end 1130, the tapered end 1140, and the output end 1150 all have smooth transitions, making the overall cross-section of the pressurization conduit 110 shaped like a "bottle". The flushing inlet 1110 is located at the bottom of the "bottle", and the flushing outlet 1120 is located at the top of the "bottle". The inner diameter of the flushing inlet 1110 is larger than the inner diameter of the flushing outlet 1120. Preferably, in this embodiment, in order to further achieve the technical effect of boosting, the inner diameter of the boosting end 1130 is set to be larger than the inner diameter of the output end 1150, and the inner diameter of the tapering end 1140 gradually changes from the inner diameter of the boosting end 1130 to the inner diameter of the output end 1150.

[0028] A pressure diaphragm 120 is disposed on the inner wall of the pressurizing conduit 110, forming a cavity between the pressure diaphragm 120 and the inner wall of the pressurizing conduit 110. Specifically, the pressure diaphragm 120 is an elastic rubber diaphragm with an arc-shaped cross-section. The pressure diaphragm 120 can be a single diaphragm, for example, arranged in a ring on the inner peripheral wall of the pressurizing end 1130, or multiple pressure diaphragms 120 can be arranged in a circumferential array along the inner peripheral wall of the pressurizing end 1130. In this embodiment, for example, two pressure diaphragms 120 are used and symmetrically arranged on the inner peripheral wall of the pressurizing end 1130. It should be noted that in this embodiment, the shape and number of pressure diaphragms 120 are not limited, as long as the output pressure of the circuit can be adjusted by regulating the expansion and contraction of the pressure diaphragms 120. When there are two or more pressure diaphragms 120, each pressure diaphragm 120 can be individually equipped with a corresponding inflation valve 130, or it can be controlled by a single inflation valve 130. For example... Figure 3 The image shown is a cross-sectional view of the pressure diaphragm 120 in its contracted state (original state). At this time, the gap between the outer walls of the pressure diaphragm 120 is at its maximum, and the inner volume of the pressurization conduit 110 is at its maximum. Figure 4 As shown, after adjustment by the inflation valve 130, the gap between the outer walls of the pressure diaphragm 120 decreases, and the inner volume of the pressurization conduit 110 decreases. Figure 5 As shown, the inflation valve 130 adjusts the pressure diaphragm 120 to continue expanding, causing the outer walls of the pressure diaphragm 120 to come into contact with each other, and the output flow rate is 0. At this time, the flushing pressurization device 100 stops the flow of flushing fluid to the first pipeline A.

[0029] An inflation valve 130 is located on the outer wall of the pressurizing conduit 110 and controls the expansion and contraction of the pressure diaphragm 120. The inflation valve 130 is connected to the cavity. After the inflation valve 130 is opened, the pressure diaphragm 120 inside the pressurizing conduit 110 begins to expand under the action of gas, reducing the volume of the inner cavity of the pressurizing conduit 110 and thus increasing the pressure of the flushing fluid passing through the cavity of the pressurizing conduit 110. By controlling the expansion state of the elastic pressure diaphragm 120 inside the pressurizing conduit 110 through the inflation valve 130, the volume of the pressurizing conduit 110 is precisely changed, ultimately achieving quantitative control of the output pressure after pressurization. This achieves precise quantitative control of the flushing pressure, suppresses backflow disturbance during the flushing process, and prevents blood from flowing back into the gap between the bearings and the motor during normal operation of the conduit pump. In this embodiment, as... Figure 5 As shown, when the outer wall of the pressure diaphragm 120 is in contact with the outside, the output flow rate is 0, and at this time the flushing fluid cannot pass through the inner cavity of the pressure boosting conduit 110.

[0030] Preferably, in this embodiment, a T-connector 140 is provided at the end of the flushing outlet 1120 furthest from the output end 1150. The pressurization conduit 110 can be connected to the circulation loop via the T-connector 140. In use, the two ends of the T-connector 140 serve as the inlet and outlet of the flushing outlet 1120. Preferably, in this embodiment, the two ends of the T-connector 140 located on the same horizontal plane and parallel to the pressurization conduit 110 can serve as the inlet and outlet of the flushing outlet 1120, and the remaining end perpendicular to the pressurization conduit 110 can serve as the input end for anticoagulant drugs. The input end can be connected to an external catheter for injecting anticoagulant drugs, such as heparin or other anticoagulant fluids. Alternatively, a Luer tee can be connected externally, and by adjusting the Luer tee to be in a connected state with the T-connector 140, the T-connector 140 can serve as a sampling port for the flushing fluid for relevant testing.

[0031] like Figure 1 As shown, the present invention also provides a flushing system, the main body of which includes a flushing pressurization device 100, an infusion bag 200, a switching valve 300, a peristaltic pump 400, a detection component 500, and a controller 700.

[0032] The flushing booster device 100 is used to regulate the flow pressure of the flushing fluid. The flushing outlet 1120 of the flushing booster device 100 is connected to the conduit pump 600 through the first pipeline A.

[0033] The infusion bag 200 is used for storing the flushing solution. The infusion bag 200 is connected to the flushing inlet 1110 of the flushing pressurization device 100 through the second pipeline B.

[0034] The switch valve 300 is installed on the second pipeline B between the infusion bag 200 and the flushing and pressurizing device 100, and is used to control the flow and shut-off of the liquid in the infusion bag 200.

[0035] A peristaltic pump 400 is installed on the second pipeline B between the switching valve 300 and the flushing and pressurizing device 100. It pumps the liquid flowing sequentially from the infusion bag 200 through the second pipeline B, the flushing and pressurizing device 100, and the first pipeline A to the tubing pump 600. In this embodiment, the peristaltic pump 400 can be a finger-shaped peristaltic pump. The peristaltic pump 400 integrates a bubble sensor to detect bubbles in the pipeline. To expel bubbles from the pipeline, the first pipeline A and the second pipeline B can be pre-charged before connecting the first pipeline A to the tubing pump 600. The end of the first pipeline A furthest from the flushing and pressurizing device 100 is connected to the infusion bag 200. At this time, the infusion bag 200, the second pipeline B, the flushing and pressurizing device 100, and the first pipeline A form a complete sealed circulation loop, and the gas in the circulation loop is gradually discharged into the infusion bag 200. After the air bubbles in the circulation loop are expelled, the end of pipe A furthest from the flushing and pressurizing device 100 is connected to the catheter pump 600, thereby introducing the flushing fluid from the loop into the catheter pump 600 and preventing blood from flowing into it. Additionally, in this embodiment, the peristaltic pump 400 can be controlled by an external separate controller or directly via an auxiliary controller. Figure 1 The controller 700 in the middle is directly controlled, and this implementation method does not impose specific limitations.

[0036] The detection component 500 includes a first pressure sensor 510 installed on the second pipeline B between the peristaltic pump 400 and the flushing pressurization device 100 for detecting the pressure before pressurization; a second pressure sensor 520 installed on the first pipeline A between the flushing pressurization device 100 and the catheter pump 600 for detecting the pressure after pressurization; and a flow sensor 530 for detecting the fluid output flow rate. For heart failure patients, the amount of flushing fluid entering the body through the aorta should not be too large, otherwise it may have adverse consequences. Therefore, it is necessary to strictly control the amount of flushing fluid entering, while ensuring a certain pressure to prevent blood from entering the catheter pump 600. This requires the detection of pressure and flow sensors. When the catheter pump 600 is performing ventricular assist, the flushing fluid will flow into the aorta along with the blood pumped out by the catheter pump 600. Therefore, strict flow control of the flushing fluid entering the body is necessary. In practice, the flow rate of the flushing fluid is generally controlled within the range of 2 ml / hr to 30 ml / hr to avoid excessive flushing fluid entering the body and diluting the blood. Preferably, in this embodiment, the first pressure sensor 510 and the second pressure sensor 520 can be absolute pressure sensors. To reduce errors and improve detection accuracy, the first pressure sensor 510 and the second pressure sensor 520 are positioned on the same horizontal plane as much as possible. The flow sensor 530 can be a non-contact flow sensor. Specifically, the flow sensor 530 can be an ultrasonic flow sensor. The flow sensor 530 is embedded outside the first pipe A and does not contact the flushing fluid in the first pipe A. The flow sensor 530 emits ultrasonic waves on one side and detects the flow rate of the flushing fluid in the first pipe A by receiving the returned ultrasonic waves. In addition, it should be noted that in this embodiment, there is no limitation on the types of the first pressure sensor 510, the second pressure sensor 520, and the flow sensor 530, as long as they can detect the pressure before and after the flushing pressurization device 100 and the liquid output flow rate.

[0037] The controller 700 is electrically connected to the inflation valve 130, the switching valve 300, the first pressure sensor 510, the second pressure sensor 520, and the flow sensor 530. In this embodiment, the first pressure sensor 520, the second pressure sensor 520, and the flow sensor 530 are all connected to the input terminal of the controller 700, and the inflation valve 130 and the switching valve 300 are respectively connected to the output terminal of the controller 700. The first pressure sensor 510, the second pressure sensor 520, and the flow sensor 530 transmit the data they collect in real time to the controller 700, and the controller 700 controls the start and stop of the inflation valve 130 and controls the operation of the switching valve 300.

[0038] Preferably, in this embodiment, a display 900 is provided to facilitate viewing of relevant pressure and flow data by medical personnel. The display 900 is connected to the controller 700 and is used to display the pressure and flow data detected by the detection component 500. The pressure and flow data transmitted by the first pressure sensor 510, the second pressure sensor 520, and the flow sensor 530 are converted into electrical signals in the controller 700 and displayed on the display 900. The display 900 is a touch screen, which allows for further setting of desired flow and pressure parameters.

[0039] Preferably, in this embodiment, in order to prevent the flushing fluid from flowing back into the second pipeline B, a one-way valve 800 is provided on the first pipeline A between the peristaltic pump 400 and the flushing pressurization device 100.

[0040] like Figure 6 As shown, the present invention also provides a quantitative pressurization method, the specific implementation steps of which are as follows: S1, Controller 700 preset desired loop output pressure value P1, tolerance δ, desired output flow value Q1; S2. Open the switch valve 300 and the peristaltic pump 400, adjust the output power of the peristaltic pump 400 and the pressure of the flushing pressurization device 100. At this time, the first pressure sensor 510 collects the pressure before pressurization Pin in real time, the second pressure sensor 520 collects the pressure after pressurization Pout in real time, and the flow sensor 530 collects the liquid output flow rate Q2 in real time. S3. When |Pout-Pin| / Pin≥k, where k∈[10,15], keep the output power of the peristaltic pump 400 constant and adjust the pressure of the flushing pressurization device 100. S4. When |Pout-P1|<δ, where δ≤2%, keep the pressure of the flushing booster device 100 constant and adjust the output power of the peristaltic pump 400. S5. When the collected liquid output flow rate Q2 is equal to the desired output flow rate Q1, keep the output power of the peristaltic pump 400 and the pressure of the flushing booster device 100 unchanged.

[0041] Preferably, in this embodiment, the following steps are included before step S2: S1-1. Open the switch valve 300 and start the peristaltic pump 400. Adjust the pressure of the flushing booster device 100. Control the expansion of the pressure diaphragm 120 through the air valve 130 to increase the pressure of the pressure diaphragm 120 until the output flow rate is 0. At this time, the flushing booster device 100 is at the cutoff pressure, which is recorded as P2_0.

[0042] Furthermore, in steps S2 and S3, the pressure values ​​of the flushing pressurization device 100 are both less than P2_0.

[0043] The flushing pressurization device 100 integrates a pressure sensor to detect the pressure of the pressure diaphragm 120 within it. Specifically, a third pressure sensor is installed in the passage connecting the inflation valve 130 and the cavity of the pressure diaphragm 120. After the inflation valve 130 is opened, the pressure of the elastic diaphragm 120 detected by the third pressure sensor is recorded as P2. Before step S2, the pressure diaphragm 120 is first expanded to a certain pressure using the inflation valve 130. Figure 5 In this state, the outer walls of the pressure diaphragm 120 are in contact, the pressure of the pressure diaphragm 120 reaches its maximum, the output flow rate is 0, and the flushing booster device 100 is at the cutoff pressure P2_0. Preferably, in order to enable the flushing booster device 100 to output a certain flow rate of flushing fluid normally, in this embodiment, the pressure value of the flushing booster device 100 in steps S2 and S3 is less than P2_0.

[0044] Overall, from the coarse adjustment of the peristaltic pump 400 output power and the flushing booster device 100 pressure in step S2, to the fine adjustment of the flushing booster device 100 pressure in step S3, the booster device 100 reaches the set tolerance value. Finally, the peristaltic pump 400 output power is finely adjusted in step S4 to ensure that the set flow rate meets the requirements.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An interventional ventricular assist device for flushing and pressurization, characterized in that, include: A pressurization conduit (110) is provided with a flushing inlet (1110) and a flushing outlet (1120). A pressure diaphragm (120) is disposed on the inner wall of the pressure boosting conduit (110), and a cavity is formed between the pressure diaphragm (120) and the inner wall of the pressure boosting conduit (110). An inflation valve (130) is disposed on the outer wall of the pressurization conduit (110) and can control the expansion and contraction of the pressure diaphragm (120), and the inflation valve (130) is in communication with the cavity.

2. The interventional ventricular assist device for flushing and pressurization according to claim 1, characterized in that: The inner diameter of the flushing inlet (1110) is larger than the inner diameter of the flushing outlet (1120).

3. The interventional ventricular assist flushing and pressurization device according to claim 1, characterized in that: The pressure diaphragm (120) has an arc-shaped cross-section.

4. An interventional ventricular assist flushing and pressurization device according to any one of claims 1-3, characterized in that: The pressurization conduit (110) includes an integrally formed pressurization end (1130), a tapered end (1140), and an output end (1150) connected in sequence. The flushing inlet (1110) is located on the side of the pressurization end (1130) away from the output end (1150), and the flushing outlet (1120) is located on the side of the output end (1150) away from the pressurization end (1130).

5. The interventional ventricular assist flushing and pressurization device according to claim 4, characterized in that: The inner diameter of the boosting end (1130) is larger than the inner diameter of the output end (1150), and the inner diameter of the tapering end (1140) gradually changes from the inner diameter of the boosting end (1130) to the inner diameter of the output end (1150).

6. The interventional ventricular assist flushing and pressurization device according to claim 4, characterized in that: The pressure diaphragm (120) is arranged in a ring on the inner peripheral wall of the pressure boosting end (1130).

7. The interventional ventricular assist flushing and pressurization device according to claim 4, characterized in that: The pressure diaphragm (120) is configured as a plurality of diaphragms, which are arranged in a circumferential array along the inner peripheral wall of the pressurization end (1130).

8. The interventional ventricular assist device for flushing and pressurization according to claim 7, characterized in that: Two pressure diaphragms (120) are provided and symmetrically arranged on the inner peripheral wall of the pressurization end (1130).

9. The interventional ventricular assist flushing and pressurization device according to claim 4, characterized in that: A tee connector (140) is provided at the end of the flushing outlet (1120) away from the output end (1150).

10. A flushing system, characterized in that: Includes the interventional ventricular assist flushing and pressurization device (100) as described in any one of claims 1-9, wherein the flushing outlet (1120) of the flushing and pressurization device (100) is connected to the catheter pump (600) via a first conduit (A); An infusion bag (200) is connected to the flushing inlet (1110) of a flushing pressurization device (100) via a second pipeline (B); A switching valve (300) is provided on the second pipeline (B) between the infusion bag (200) and the flushing and pressurizing device (100) to control the flow and shut-off of liquid in the infusion bag (200); A peristaltic pump (400) is installed on a second pipeline (B) between a switch valve (300) and a flushing and pressurizing device (100) to pump the liquid in the infusion bag (200) that flows sequentially through the second pipeline (B), the flushing and pressurizing device (100) and the first pipeline (A) into the conduit pump (600); The detection assembly (500) includes a first pressure sensor (510) disposed on a second pipeline (B) between the peristaltic pump (400) and the flushing pressurization device (100) for detecting the pressure before pressurization, a second pressure sensor (520) disposed on a first pipeline (A) between the flushing pressurization device (100) and the conduit pump (600) for detecting the pressure after pressurization, and a flow sensor (530) for detecting the liquid output flow rate.

11. The flushing system according to claim 10, characterized in that: It also includes a controller (700) which is electrically connected to an inflation valve (130), a switching valve (300), a first pressure sensor (510), a second pressure sensor (520), and a flow sensor (530), respectively.

12. The flushing system according to claim 11, characterized in that: It also includes a display (900) connected to the controller (700) for displaying pressure and flow data detected by the detection component (500).

13. The flushing system according to any one of claims 10-12, characterized in that: A check valve (800) is provided on the first pipeline (A) between the peristaltic pump (400) and the flushing pressurization device (100).

14. A quantitative pressurization method, applied to the flushing system as described in any one of claims 10-13, characterized in that, Includes the following steps: S1, preset expected pressure value P1, tolerance δ, expected output flow value Q1; S2. Open the switch valve (300) and start the peristaltic pump (400). Adjust the output power of the peristaltic pump (400) and the pressure of the flushing booster device (100). At this time, the first pressure sensor (510) collects the pressure before boosting Pin in real time, the second pressure sensor (520) collects the pressure after boosting Pout in real time, and the flow sensor (530) collects the liquid output flow rate Q2 in real time. S3. When |Pout-Pin| / Pin≥k, where k∈[10,15], keep the output power of the peristaltic pump (400) constant and adjust the pressure of the flushing booster device (100); S4. When |Pout-P1|<δ, where δ≤2%, keep the pressure of the flushing booster device (100) constant and adjust the output power of the peristaltic pump (400); S5. When Q2=Q1, keep the output power of the peristaltic pump (400) and the pressure of the flushing booster device (100) constant.

15. A quantitative pressurization method according to claim 14, characterized in that: The following steps are included before step S2: S1-1. Open the switch valve (300) and start the peristaltic pump (400). Adjust the pressure of the flushing booster device (100). Control the expansion of the pressure diaphragm (120) through the air valve (130) to increase the pressure of the pressure diaphragm (120) until the output flow rate is 0. At this time, the flushing booster device (100) is at the cutoff pressure, which is recorded as P2_0.

16. The quantitative pressurization method according to claim 15, characterized in that: In steps S2 and S3, the pressure value of the flushing pressurization device (100) is less than P2_0.

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