CN210020563U - A percutaneous left ventricular assisted circulatory system - Google Patents

Abstract

The utility model discloses a percutaneous left heart auxiliary circulation system, which relates to the field of medical technology. The main points of the technical solution are: a dual-chamber blood pump and a main controller for controlling the operation of the dual-chamber blood pump; the main controller is connected with a An electrocardiogram monitor for monitoring cardiac electrocardiographic signals; a double-chamber blood pump includes an inflow chamber, an outflow chamber connected with the inflow chamber, and a blood pump power system; the inflow chamber is connected with a blood introduction tube, and the blood introduction tube is far away from the end of the double-chamber blood pump The outflow lumen is connected with a blood outflow tube, and the end of the outflow tube away from the double-chamber blood pump is inserted into the aorta by one or both femoral arteries; a one-way mechanical device is arranged between the outflow lumen and the blood outflow tube. valve. It can stabilize the hemodynamics of patients with cardiogenic shock according to the ECG signal of patients with cardiogenic shock, break the vicious circle caused by cardiogenic shock, thus avoid multiple organ failure caused by cardiogenic shock, and have a negative impact on the patient's body. The trauma is small, and the effect of temporary circulatory support is convenient for patients.

Description

A percutaneous left ventricular assisted circulatory system

technical field

The utility model relates to the field of medical technology, in particular to a percutaneous left heart auxiliary circulation system.

Background technique

Cardiogenic shock is clinical viral myocarditis is one of the more common clinical cardiovascular diseases, the virus causing myocarditis is the most common coxsackie virus group B, but the exact pathogenesis is not completely clear. The clinical manifestations and prognosis of myocarditis vary, ranging from mild cases with asymptomatic symptoms to severe hemodynamic changes, such as heart failure, cardiogenic shock, malignant arrhythmia and even sudden death. Studies have shown that myocarditis causes sudden cardiac death in young adults ranging from 8.6% to 12%. Furthermore, in a large prospective cohort study, myocarditis resulted in a 9% incidence of dilated cardiomyopathy. Severe fulminant myocarditis (FM) has abrupt onset, severe disease, and rapid changes, accounting for about 11% of the total number of acute myocarditis. The prognosis is poor, and the acute mortality rate can be as high as 10% to 20%. If identified quickly, and given intensive support and symptomatic treatment at the same time, more than 90% of patients can recover completely with few sequelae.

There is no effective treatment for FM so far, and symptomatic and supportive therapy are generally used. Patients with hemodynamic instability or recurrent heart failure are generally given first-line supportive care. Concomitant use of inotropes with or without corticosteroids may restore myocardial function, but can also lead to hemodynamic decompensation and even death. Therefore, in the acute phase, especially for patients with refractory heart failure, mechanical assistance is currently recommended, including: intra-aortic balloon pumping, percutaneous cardiopulmonary support systems, ventricular assist devices, and extracorporeal membrane oxygenation Wait.

Intra-aortic balloon pumping is to insert a balloon-equipped catheter through the arterial system in the descending aorta distal to the left subclavian artery and proximal to the opening of the renal artery, and the distal end of the catheter is connected to a counterpulsator. In the diastolic period, the air bag is inflated, and the air bag is exhausted in the systolic period, which plays a role in assisting the heart pump, which can reduce the pressure in the lower aorta, reduce the afterload of the heart, reduce myocardial oxygen consumption, and reduce cardiac work. Increased intra-aortic pressure during diastole increases coronary perfusion during diastole, thereby restoring function to a suppressed or ischemic myocardium. However, the effect of IABP on blood pressure and coronary (coronary) blood flow depends on the function of the patient's left ventricle. For patients with complete hemodynamic collapse, only a small amount of circulatory support can be provided.

Percutaneous Cardiopulmonary Support System (PCPS) is an effective bedside auxiliary circulatory support system developed in recent years, and it is one of the forms of extracorporeal circulation (cardiopulmonary bypass). The system establishes a pipeline by percutaneous puncture, oxygenates red blood cells with an oxygenator, and replaces the function of the lungs; uses a centrifugal pump to generate circulatory power to replace the systolic function of the left ventricle to help patients survive the dangerous period. However, the effect of left ventricular assist in PCPS is still unsatisfactory, especially the afterload problem caused by flow assist cannot be ruled out. Therefore, close attention should be paid to cases of severe left ventricular dysfunction. Complications associated with PCPS are mainly cardiovascular complications caused by catheterization and thrombotic infarction or bleeding caused by auxiliary circulation. PCPS is generally only suitable for short-term auxiliary circulation in emergency, and is not sufficient for the recovery of extremely low cardiac function.

Ventricular assist device (VAD) can drain the blood from the atrium or ventricle to the assist device, and after boosting the pressure by the blood pump, it is then returned to the arterial system to partially or completely replace the work of the heart and maintain blood circulation. Implantable LVADs implant a blood pump into the patient (either in the peritoneal cavity or in the extraperitoneal space) and require a conduit through the skin to supply energy and compensate for changes in the volume of the blood pump in the body. For one-time use only. Significantly increases the cost of use.

The essence of Extracorporeal Membrane Oxygenation (ECMO) is an improved artificial heart-lung machine. The core parts are the membrane lung and the blood pump, which function as an artificial lung and an artificial heart respectively. During ECMO operation, blood is drawn from the veins, through the membrane lung to absorb oxygen and expel carbon dioxide. The blood that has undergone gas exchange can be returned to the vein (VV access) or arterial (VA access) under the push of the pump. The former is mainly used for extracorporeal respiratory support, while the latter can be used for both extracorporeal respiratory support and cardiac support because the blood pump can replace the pumping function of the heart. When a patient's lung function is severely damaged and is ineffective for conventional treatments, ECMO can take on the task of gas exchange, keep the lungs at rest, and gain valuable time for the patient's recovery. Similarly, when the patient's heart function is severely damaged, the blood pump can replace the heart's pumping function and maintain blood circulation. At present, ECMO is regarded as the cutting-edge technology of cardiopulmonary bypass support. However, due to the complexity of its operation, it cannot be applied to the auxiliary support of emergency heart failure, and it has certain limitations in its use. In addition, ECMO equipment is also too expensive.

In the prior art, transaortic balloon counterpulsation, percutaneous cardiopulmonary support system, left ventricular assist device, and extracorporeal membrane oxygenation all have their own limitations for circulatory support during the rescue of fulminant myocarditis. Therefore, there is an urgent need to solve the problems existing in the above-mentioned devices, and to develop an auxiliary circulatory system that is relatively simple to implant and remove, less traumatic to the patient's body, suitable for patients who need temporary circulatory support, and has strong practicability for clinical treatment. .

Utility model content

The purpose of the present utility model is to provide a percutaneous left ventricular auxiliary circulation system, which can stabilize the hemodynamics of the patient according to the ECG signal of the patient with cardiogenic shock, break the vicious circle caused by the cardiogenic shock, and thus can avoid Multiple organ failure caused by cardiogenic shock, and the trauma to the patient's body is small, which is convenient for the effect of temporary circulatory support for the patient.

The above technical purpose of the present utility model is achieved through the following technical solutions: a percutaneous left ventricular auxiliary circulation system, comprising a dual-chamber blood pump and a main controller for controlling the operation of the dual-chamber blood pump; the main controller An electrocardiogram monitor for monitoring cardiac electrocardiographic signals is connected; the double-chamber blood pump includes an inflow chamber, an outflow chamber connected with the inflow chamber, and a blood pump power system connected with the main controller; the inflow chamber is connected with blood An introduction tube, the end of the blood introduction tube away from the dual-chamber blood pump is inserted into the left atrium; the outflow chamber is connected with a blood outflow tube, and the end of the outflow tube away from the dual-chamber blood pump is separated from one side or two sides of the femur. The artery is inserted into the aorta; a one-way mechanical valve is arranged between the outflow cavity and the blood outflow tube.

By adopting the above technical solution, in the process of using the percutaneous left ventricular assisted circulatory system to treat the patient, it is convenient to monitor the patient's ECG signal in real time through the ECG monitor; then, the ECG monitor will monitor the patient's ECG signal. The ECG signal is transmitted to the main controller. After receiving the ECG signal of the patient, the main controller analyzes and processes the ECG signal, and then the main controller sends a control command signal to the dual-chamber blood pump according to the ECG signal. It controls the blood pump power system to work according to the ECG signal; through the work of the blood pump power system, it can provide power for the double-chamber blood pump to draw blood. Under the suction effect of the double-chamber blood pump, the oxygenated blood in the left atrium of the heart can be sucked into the inflow chamber of the double-chamber blood pump through the blood introduction tube; the inflow chamber is convenient for storing the oxygen pumped from the left atrium Oxygenated blood; through the outflow cavity connected to the inflow cavity, it is convenient to pump the oxygenated blood stored in the inflow cavity into the outflow cavity, and then pump the oxygenated blood in the outflow cavity out of the outflow cavity to the blood outflow tube; through the blood outflow tube , it is convenient to transport oxygenated blood to the aorta; through the one-way mechanical valve, it is convenient for the oxygenated blood to flow in one direction; through the dual-chamber blood pump, the blood introduction tube, the blood outflow tube, the main control for controlling the dual-chamber blood pump The device and the ECG monitor connected to the main controller can extract the oxygenated blood from the patient’s left atrium to the aorta according to the set cycle, speed and time according to the patient’s ECG signal, thereby assisting in supporting fulminant myocarditis complicated with heart disease. For patients with cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock, reduce the cardiac load during cardiogenic shock and increase intra-aortic blood perfusion.

The utility model is further configured as follows: the blood pump power system includes a driving device and a power supply device connected with the main controller, the power supply device is connected with the driving device; the driving device is a mechanical diastolic system connected with the main controller ; The mechanical relaxation and contraction system includes a squeeze cavity and a hydraulic cavity located in the outflow cavity; the hydraulic cavity is provided with a liquid pump connected to the main controller and the power supply device; the squeeze cavity and the hydraulic cavity are provided with an elastic membrane; the power supply device includes an external power supply interface and a built-in battery.

By adopting the above technical solution, the mechanical diastolic system composed of the extrusion chamber, the hydraulic chamber and the liquid pump located in the hydraulic chamber is convenient to provide the driving force for the double-chamber blood pump, so as to realize the pumping of blood; During the suction process, the main controller sends control information to the liquid pump in the hydraulic chamber and controls the liquid pump to work; The blood transmits pressure to generate blood flow; through the power supply device, it is convenient to supply power for the work of the mechanical diastolic system; through the power supply device composed of an external power interface and a built-in battery, it is convenient for the dual-chamber blood pump to meet the needs of long-term fixed work and short-term mobile work. dual needs.

The utility model is further configured as follows: the length of the blood introduction tube is 74-76 cm; the blood introduction tube is provided with a first filter, and the first filter is 5 cm away from the connection between the inflow cavity and the blood introduction tube.

By adopting the above technical solution, through the first filter, small thrombus in the oxygenated blood drawn from the left atrium of the heart can be prevented from entering the inflow cavity.

The utility model is further configured as follows: the length of the blood outflow tube is 84-86cm; the blood outflow tube is provided with a second filter, and the second filter is 5cm away from the connection between the blood outflow tube and the outflow cavity.

By adopting the above technical solution, small thrombus in the oxygenated blood can be prevented from entering the systemic circulation through the outflow cavity through the second filter.

The utility model is further configured as follows: the inflow cavity and the outflow cavity are connected by a medical conduit; the medical conduit is provided with a first check valve; the blood outflow pipe is provided with a second check valve, the second A check valve is located between the second filter and the outflow chamber.

By adopting the above technical solution, it is convenient for the oxygenated blood flowing into the cavity to enter the outflow cavity through the medical catheter; through the first check valve, it is convenient to prevent the reverse flow of the oxygenated blood during the process of entering the outflow cavity from the inflow cavity; The second check valve facilitates preventing backflow of oxygenated blood from the outflow lumen through the blood outflow tube into the aorta.

The utility model is further configured as follows: the blood outflow pipe is a 17F or two 15F polyurethane catheters.

By adopting the above technical solution, a 17F or two 15F polyurethane catheters are used, so that the blood outflow tube has good extensibility and bending resistance; at the same time, the polyurethane catheter is used as the blood outflow tube, so that the blood outflow tube has a biological phase. It has the characteristics of good compatibility, blood compatibility and antithrombotic properties, so that it will not damage blood components.

The utility model is further configured as follows: the blood introduction pipe is a 21F polyurethane catheter; the head end of the blood introduction pipe is provided with an end hole and a plurality of side holes.

By adopting the above technical solution, a 21F polyurethane catheter is used as the blood outflow tube, so that the blood introduction tube has the characteristics of good biocompatibility, blood compatibility and antithrombotic performance, so that the blood components will not be damaged; One end hole and multiple side holes at the head end facilitate the oxygenated blood at the left atrium of the heart to smoothly enter the blood introduction tube during the working process of the double-chamber blood pump.

The utility model is further configured as follows: the blood outflow tube is provided with a water-filled balloon at the abdominal aorta above the common iliac artery.

By adopting the above technical solution, the water-filled balloon is convenient to reduce or prevent the supply of blood to the lower limbs in a short time, thereby ensuring the preferential blood supply of important organs such as the heart, brain and kidney.

The utility model is further configured as follows: the main controller is connected with a pressure sensor for detecting blood flow pressure and a warning device; the pressure sensor is connected with the blood flow outflow pipe; the warning device is connected with the outer wall of the double-chamber blood pump.

By adopting the above technical solution, it is convenient to monitor the pressure of blood flow through the pressure sensor; the pressure sensor transmits the monitored blood flow pressure information to the main controller, and the main controller receives the blood flow pressure information after receiving the blood flow pressure information. Carry out analysis and processing, and control and adjust parameters such as the working cycle, speed and working time of the liquid pump in the mechanical diastolic and systolic system according to the blood flow pressure information, so as to regulate the operation of the entire auxiliary circulation system; The blood pressure information of the device sends out control command information to the alarm device, and controls the alarm device to work to emit a warning sound, thereby attracting the attention of the doctor.

The utility model is further configured as follows: the double-chamber blood pump is provided with an inner layer and an outer layer; the inner layer and the outer layer are seamlessly fitted by negative pressure; the outer layer is connected with the blood pump power system.

By adopting the above technical solution, the inner layer and the outer layer are seamlessly fitted by negative pressure, which facilitates the replacement of the inner layer at any time, thereby reducing the use cost of the physiological type percutaneous left ventricular assisted circulation system.

To sum up, the utility model has the following beneficial effects: the ECG monitor facilitates real-time monitoring of the patient's ECG signal; then, the ECG monitor transmits the monitored patient's ECG signal to the main controller, and the main After receiving the ECG signal of the patient, the controller analyzes and processes the ECG signal, and then the main controller sends a control command signal to the blood pump power system in the double-chamber blood pump according to the ECG signal, and according to the ECG signal The electrical signal controls the blood pump power system to work; through the work of the blood pump power system, it is convenient to provide power for the suction effect of the double-chamber blood pump; through the blood introduction tube, it is convenient for the double-chamber blood pump to extract oxygen from the left atrium of the heart Through the inflow cavity, it is convenient to store oxygenated blood drawn from the left atrium; through the outflow cavity connected to the inflow cavity, it is convenient to pump the oxygenated blood stored in the inflow cavity into the outflow cavity, and then pump the oxygenated blood in the outflow cavity into the outflow cavity. Oxygenated blood is pumped out of the outflow lumen to the blood outflow tube; through the blood outflow tube, it is convenient to transport oxygenated blood to the aorta; through the one-way mechanical valve, it is convenient for the one-way flow of oxygenated blood; through the dual-chamber blood pump, the blood is introduced A tube, a blood outflow tube, a main controller for controlling the dual-chamber blood pump, and an ECG monitor connected to the main controller, which can oxygenate the left atrium of the patient according to the patient's ECG signal according to the set period, The speed and time are extracted to the aorta, so as to facilitate the auxiliary support of patients with fulminant myocarditis complicated with cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock, reduce the cardiac load in patients with cardiogenic shock, and increase the blood perfusion in the aorta.

Description of drawings

Fig. 1 is the structural representation in the embodiment of the present utility model;

Fig. 2 is the structural block diagram in the embodiment of the present utility model;

FIG. 3 is a schematic structural diagram of the head end of the blood flow introduction tube in the embodiment of the present invention.

In the figure: 1. Double-chamber blood pump; 2. Main controller; 3. ECG monitor; 4. Inflow cavity; 5. Outflow cavity; 6. Blood introduction tube; 7. Blood outflow tube; 8. One-way mechanical Valve; 9. Power supply device; 10. Extrusion chamber; 11. Hydraulic chamber; 12. Liquid pump; 13. Elastic membrane; 14. External power interface; 15. Built-in battery; 16. First filter; 17. Section Second filter; 18, medical catheter; 19, first check valve; 20, second check valve; 21, end hole; 22, side hole; 23, water-filled balloon; 24, pressure sensor; 25, Warning device; 26, outer layer; 27, inner layer; 28, left atrium; 29, aorta.

Detailed ways

The present utility model will be described in further detail below in conjunction with accompanying drawings 1-3.

Embodiment: A percutaneous left heart assisted circulation system, as shown in FIG. 1 , FIG. 2 and FIG. 3 , includes a dual-chamber blood pump 1 and a main controller 2 for controlling the operation of the dual-chamber blood pump 1 . The main controller 2 is connected with an electrocardiogram monitor 3 for monitoring cardiac electrocardiogram signals, and the electrocardiogram monitor 3 is coupled to the main controller 2 . The dual-chamber blood pump 1 includes an inflow chamber 4 , an outflow chamber 5 connected with the inflow chamber 4 , and a blood pump power system connected with the main controller 2 . The inflow chamber 4 is connected with a blood introduction tube 6 , and the end of the blood introduction tube 6 away from the double-chamber blood pump 1 is inserted into the left atrium 28 . The outflow chamber 5 is connected with a blood outflow tube 7, and the end of the outflow tube away from the double-chamber blood pump 1 is inserted into the aorta 29 by one or both femoral arteries. A one-way mechanical valve 8 is installed between the outflow chamber 5 and the blood outflow tube 7 .

In this embodiment, the main controller 2 is an embedded microprocessor. The blood introduction tube 6 ascends through the femoral vein to the right atrium, and is then punctured through the atrial septum and inserted into the left atrium 28 . In the process of using the percutaneous left ventricular assisted circulatory system to treat the patient, the ECG monitor 3 is used to monitor the patient's ECG signal in real time. Then, the ECG monitor 3 transmits the monitored ECG signal of the patient to the main controller 2. After receiving the ECG signal of the patient, the main controller 2 analyzes and processes the ECG signal, and then the main controller 2 analyzes and processes the ECG signal. 2. Send a control command signal to the blood pump power system in the double-chamber blood pump 1 according to the ECG signal, and control the blood pump power system to work according to the ECG signal. Through the operation of the blood pump power system, the dual-chamber blood pump 1 can provide power for drawing blood. Under the suction action of the dual-chamber blood pump 1 , the oxygenated blood in the left atrium 28 of the heart can be sucked into the inflow chamber 4 of the dual-chamber blood pump 1 through the blood introduction tube 6 . Oxygenated blood aspirated from the left atrium 28 is facilitated by the inflow lumen 4 . The flow and transfer of oxygenated blood in the inflow chamber 4 is facilitated by the outflow chamber 5 connected to the inflow chamber 4 , and then the oxygenated blood pump 12 in the outflow chamber 5 is pumped out of the outflow chamber 5 to the blood outflow tube 7 . The delivery of oxygenated blood to the aorta 29 is facilitated through the blood outflow tube 7 . The one-way flow of oxygenated blood is facilitated by the one-way mechanical valve 8 . Through the dual-chamber blood pump 1 , the blood introduction tube 6 , the blood outflow tube 7 , the main controller 2 for controlling the dual-chamber blood pump 1 , and the ECG monitor 3 connected to the main controller 2 , the patient's ECG can be monitored according to the patient's ECG. The signal draws the oxygenated blood from the left atrium 28 of the patient to the aorta 29 according to the set cycle, rotation speed and time, so as to facilitate the auxiliary support of patients with fulminant myocarditis complicated with cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock, and reduce the risk of patient loss. Cardiac load in cardiogenic shock, increased blood perfusion in the aorta 29 .

The blood pump power system includes a driving device connected with the main controller 2 and a power supply device 9, and the power supply device 9 is connected with the driving device. The driving device is a mechanical relaxation and contraction system connected with the main controller 2 . The mechanical relaxation and contraction system includes an extrusion chamber 10 and a hydraulic chamber 11 located in the outflow chamber 5 . A hydraulic pump 12 connected to the main controller 2 and the power supply device 9 is installed in the hydraulic chamber 11 . The extrusion chamber 10 and the hydraulic chamber 11 are separated by an elastic membrane 13 . The power supply device 9 includes an external power supply interface and a built-in battery 15 .

In this embodiment, the liquid pump 12 is a speed-adjustable micro self-priming liquid pump 12 . The elastic membrane 13 is a biological protein membrane with a large elastic coefficient and can withstand nearly 10,000 elastic deformations. The built-in battery 15 is a micro battery. The mechanical diastolic system composed of the extrusion chamber 10 , the hydraulic chamber 11 and the liquid pump 12 located in the hydraulic chamber 11 is convenient to provide driving force for the dual-chamber blood pump 1 , so as to realize the pumping of blood. During the process of blood pumping, the main controller 2 sends control information to the liquid pump 12 in the hydraulic chamber 11, and controls the liquid pump 12 to work. Through the operation of the liquid pump 12, the liquid in the hydraulic chamber 11 is sucked in or discharged, thereby forming the blood transmission pressure in the squeezing chamber 10, and generating blood flow. Through the power supply device 9, it is convenient to supply power for the work of the mechanical relaxation and contraction system. The power supply device 9 constituted by the external power supply interface and the built-in battery 15 facilitates the dual-chamber blood pump 1 to meet the dual requirements of long-term fixed work and short-term mobile work.

The length of the blood introduction tube 6 is 74-76 cm. The blood introduction tube 6 is provided with a first filter 16 , and the first filter 16 is 5 cm away from the connection between the inflow chamber 4 and the blood introduction tube 6 .

In the present embodiment, small thrombi in the oxygenated blood drawn from the left atrium 28 of the heart can be prevented from entering the inflow cavity 4 by the first filter 16 .

The length of the blood outflow tube 7 is 84-86 cm. The blood outflow tube 7 is provided with a second filter 17 , and the second filter 17 is 5 cm away from the connection between the blood outflow tube 7 and the outflow cavity 5 .

In this embodiment, the second filter 17 can prevent small thrombi in the oxygenated blood from entering the systemic circulation through the outflow cavity 5 .

The inflow chamber 4 and the outflow chamber 5 are connected by a medical conduit 18 . The medical catheter 18 is provided with a first check valve 19 . The blood outflow tube 7 is provided with a second check valve 20 located between the second filter 17 and the outflow chamber 5 .

In this embodiment, the medical catheter 18 is a catheter made of polyurethane. The oxygenated blood flowing into the lumen 4 is facilitated to enter the outflow lumen 5 through the medical catheter 18 . By means of the first check valve 19 , it is facilitated to prevent backflow of oxygenated blood from the inflow chamber 4 into the outflow chamber 5 . The second check valve 20 facilitates preventing the reverse flow of oxygenated blood from the outflow lumen 5 through the blood outflow tube 7 into the aorta 29 .

The blood outflow tube 7 is a 17F or two 15F polyurethane catheters.

In the present embodiment, F is a symbol in the French measurement system, indicating the diameter of the blood outflow tube 7, wherein 1F is set as 1/3 of 1mm, so the diameter 1F≈0.33mm. Through one 17F or two 15F polyurethane catheters, the blood outflow tube 7 has good extensibility and flexural resistance. At the same time, the polyurethane catheter is used as the blood outflow tube 7, so that the blood outflow tube 7 has the characteristics of good biocompatibility, good blood compatibility and antithrombotic performance, so that the blood components will not be damaged.

The blood introduction tube 6 is a 21F polyurethane catheter. The head end of the blood introduction tube 6 is provided with an end hole 21 and a plurality of side holes 22 .

In the present embodiment, F is a symbol in the French measurement system, indicating the diameter of the blood outflow tube 7, wherein 1F is set as 1/3 of 1mm, so the diameter 1F≈0.33mm. A polyurethane catheter with a diameter of 21F is used as the blood outflow tube 7, so that the blood introduction tube 6 has the characteristics of good biocompatibility, good blood compatibility and antithrombotic performance, so that the blood components will not be damaged. Through one end hole 21 and a plurality of side holes 22 at the head end of the blood introduction tube 6 , the oxygenated blood at the left atrium 28 of the heart can smoothly enter the blood introduction tube 6 during the operation of the dual-chamber blood pump 1 .

A water-filled balloon 23 is installed on the blood outflow tube 7 through the abdominal aorta 29 above the common iliac artery.

In this embodiment, the water-filled balloon 23 is filled with physiological saline. The water-filled balloon 23 can reduce or prevent the blood supply to the lower extremities in a short time, thereby ensuring the preferential blood supply to important organs such as the heart, brain, and kidneys.

The main controller 2 is connected with a pressure sensor 24 for detecting blood pressure and a warning device 25 ; the pressure sensor 24 is connected with the blood flow outflow pipe; the warning device 25 is connected with the outer wall of the double-chamber blood pump 1 .

In this embodiment, the pressure of the blood flow is monitored in real time by the pressure sensor 24 . The pressure sensor 24 transmits the monitored blood flow pressure information to the main controller 2, and the main controller 2 analyzes and processes the blood flow pressure information after receiving the blood flow pressure information, and controls and adjusts the blood flow pressure information according to the blood flow pressure information. Parameters such as the working cycle, rotational speed and working time of the liquid pump 12 in the mechanical relaxation and contraction system, so as to regulate the operation of the entire auxiliary circulation system. At the same time, the main controller 2 sends control command information to the warning device 25 according to the blood flow pressure information monitored by the pressure sensor 24, and controls the warning device 25 to work to emit a warning sound, thereby attracting the attention of the doctor.

The double-chamber blood pump 1 has a two-layer structure of an inner layer 27 and an outer layer 26 . The inner layer 27 and the outer layer 26 are seamlessly fitted by negative pressure. The outer layer 26 is connected to the blood pump power system.

In this embodiment, the inner layer 27 and the outer layer 26 are seamlessly fitted by negative pressure, which facilitates the replacement of the inner layer 27 at any time, thereby reducing the use cost of the physiological type percutaneous left ventricular assist circulation system.

Working principle: In the process of using the percutaneous left ventricular assisted circulatory system to treat the patient, the ECG monitor 3 is used to monitor the patient's ECG signal in real time. Then, the ECG monitor 3 transmits the monitored ECG signal of the patient to the main controller 2. After receiving the ECG signal of the patient, the main controller 2 analyzes and processes the ECG signal, and then the main controller 2 analyzes and processes the ECG signal. 2. Send a control command signal to the blood pump power system in the double-chamber blood pump 1 according to the ECG signal, and control the blood pump power system to work according to the ECG signal. Through the operation of the blood pump power system, it is convenient to provide power for the suction action drawn by the dual-chamber blood pump 1 . Through the blood introduction tube 6 , it is convenient for the dual-chamber blood pump 1 to draw oxygenated blood in the left atrium 28 of the heart. Oxygenated blood aspirated from the left atrium 28 is facilitated by the inflow lumen 4 . Through the outflow chamber 5 connected with the inflow chamber 4, the oxygenated blood pump 12 stored in the inflow chamber 4 is conveniently fed into the outflow chamber 5, and then the oxygenated blood pump 12 in the outflow chamber 5 is discharged out of the outflow chamber 5 to the blood outflow tube 7. The delivery of oxygenated blood to the aorta 29 is facilitated through the blood outflow tube 7 . The one-way flow of oxygenated blood is facilitated by the one-way mechanical valve 8 . Through the dual-chamber blood pump 1 , the blood introduction tube 6 , the blood outflow tube 7 , the main controller 2 for controlling the dual-chamber blood pump 1 , and the ECG monitor 3 connected to the main controller 2 , the patient's ECG can be monitored according to the patient's ECG. The signal draws the oxygenated blood from the left atrium 28 of the patient to the aorta 29 according to the set cycle, rotation speed and time, so as to facilitate the auxiliary support of patients with fulminant myocarditis complicated with cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock, and reduce the risk of patient loss. Cardiac load in cardiogenic shock, increased blood perfusion in the aorta 29 .

This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. Those skilled in the art can make modifications to the present embodiment without creative contribution as needed after reading this specification, but as long as the utility model is used in the present invention All new types of claims are protected by the patent law.

Claims (10)

1. A percutaneous left ventricular assisted circulation system is characterized in that: comprising a dual-chamber blood pump (1) and a main controller (2) for controlling the operation of the dual-chamber blood pump (1); the main controller ( 2) An electrocardiogram monitor (3) for monitoring cardiac electrocardiographic signals is connected; the dual-chamber blood pump (1) includes an inflow chamber (4), an outflow chamber (5) connected with the inflow chamber (4), and an outflow chamber (5) connected with the inflow chamber (4); A blood pump power system connected to the main controller (2); the inflow chamber (4) is connected with a blood introduction tube (6), and the blood introduction tube (6) is placed away from the end of the double-chamber blood pump (1) The left atrium (28); the outflow chamber (5) is connected with a blood outflow tube (7), and the end of the outflow tube away from the double-chamber blood pump (1) is inserted into the aorta by one or both femoral arteries ( 29); a one-way mechanical valve (8) is provided between the outflow cavity (5) and the blood outflow tube (7). 2. A percutaneous left ventricular assisted circulatory system according to claim 1, characterized in that: the blood pump power system comprises a drive device and a power supply device (9) connected with the main controller (2), the The power supply device (9) is connected with the driving device; the driving device is a mechanical relaxation and contraction system connected with the main controller (2); the mechanical relaxation and contraction system comprises a squeeze cavity (10) located in the outflow cavity (5) and a hydraulic chamber (11); the hydraulic chamber (11) is provided with a liquid pump (12) connected to the main controller (2) and the power supply device (9); the extrusion chamber (10) is connected to the hydraulic chamber (12). 11) An elastic film (13) is arranged between; the power supply device (9) includes an external power supply interface and a built-in battery (15). 3. A percutaneous left ventricular assisted circulatory system according to claim 1, characterized in that: the length of the blood introduction tube (6) is 74-76 cm; the blood introduction tube (6) is provided with a first A filter (16), the first filter (16) is 5 cm away from the connection between the inflow cavity (4) and the blood introduction tube (6). 4. A percutaneous left ventricular assisted circulatory system according to claim 3, characterized in that: the length of the blood outflow tube (7) is 84-86 cm; the blood outflow tube (7) is provided with a second filter The second filter (17) is 5 cm away from the connection between the blood outflow tube (7) and the outflow cavity (5). 5. A percutaneous left ventricular assisted circulatory system according to claim 1, characterized in that: the inflow cavity (4) and the outflow cavity (5) are connected by a medical conduit (18); the medical conduit (18) A first check valve (19) is provided; the blood outflow pipe (7) is provided with a second check valve (20), and the second check valve (20) is located in the second filter (17) ) and the outflow chamber (5). 6 . The percutaneous left ventricular assisted circulatory system according to claim 1 , wherein the blood outflow tube ( 7 ) is a 17F or two 15F polyurethane catheters. 7 . 7. A percutaneous left ventricular assisted circulatory system according to claim 1, characterized in that: the blood introduction tube (6) is a 21F polyurethane catheter; the head end of the blood introduction tube (6) is provided with 1 end hole (21) and multiple side holes (22). 8. A percutaneous left ventricular assisted circulatory system according to claim 1, wherein the blood outflow tube (7) is provided with a water-filled balloon at the abdominal aorta (29) above the common iliac artery (twenty three). 9. A percutaneous left ventricular assisted circulatory system according to claim 1, wherein the main controller (2) is connected with a pressure sensor (24) and a warning device (25) for detecting blood flow pressure; The pressure sensor (24) is connected with the blood flow outflow pipe; the warning device (25) is connected with the outer wall of the double-chamber blood pump (1). 10. A percutaneous left ventricular assisted circulation system according to claim 1, characterized in that: the double-chamber blood pump (1) is provided with an inner layer (27) and an outer layer (26); the inner layer is provided with an inner layer (27) and an outer layer (26); (27) and the outer layer (26) are seamlessly fitted by negative pressure; the outer layer (26) is connected with the blood pump power system.

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