CN210020563U

CN210020563U - Percutaneous left heart auxiliary circulation system

Info

Publication number: CN210020563U
Application number: CN201920562887.1U
Authority: CN
Inventors: 杨庆; 岳稳
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-02-07
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses a percutaneous left heart auxiliary circulation system relates to medical technical field, and its technical scheme main points are: comprises a double-cavity blood pump and a main controller for controlling the operation of the double-cavity blood pump; the main controller is connected with an electrocardio monitor for monitoring electrocardiosignals of the heart; the double-cavity blood pump comprises an inflow cavity, an outflow cavity connected with the inflow cavity and a blood pump power system; the inflow cavity is connected with a blood introducing pipe, and the end part of the blood introducing pipe, which is far away from the double-cavity blood pump, is placed into the left atrium; the outflow cavity is connected with a blood outflow pipe, and the end part of the outflow pipe, which is far away from the double-cavity blood pump, is placed into the aorta from one side or two sides of femoral artery; a one-way mechanical valve is arranged between the outflow cavity and the blood outflow tube. The cardiogenic shock support system has the effects of stabilizing the hemodynamics of a patient according to the electrocardiosignals of the patient suffering from cardiogenic shock, breaking the vicious circle caused by cardiogenic shock, avoiding multi-organ functional failure caused by cardiogenic shock, having small wound on the body of the patient and facilitating temporary circulation support for the patient.

Description

Percutaneous left heart auxiliary circulation system

Technical Field

The utility model relates to the field of medical technology, more specifically say, it relates to a percutaneous left heart auxiliary circulation system.

Background

Cardiogenic shock is one of the more common cardiovascular diseases in clinic for clinical viral myocarditis, and viruses causing myocarditis are most common in coxsackie virus B group, but the exact pathogenesis is not completely clear at present. Myocarditis has inconsistent clinical manifestations and prognosis, mild patients may have no subjective symptoms, while severe patients often develop severe hemodynamic changes, such as heart failure, cardiogenic shock, malignant arrhythmia, and even sudden death. Studies have shown that myocarditis leads to 8.6% to 12% sudden cardiac death in young adults. In addition, in a large prospective cohort study, myocarditis resulted in an expansion-type cardiomyopathy incidence of 9%. Severe acute myocarditis (FM) is acute, serious, and rapidly changing, accounting for about 11% of the total number of acute myocarditis, with a poor prognosis and a mortality rate of 10% to 20% in the acute phase. If rapidly identified, with intensive support and symptomatic treatment, more than 90% of patients can recover completely with little sequelae left.

FM has no specific treatment until now, and symptomatic and supportive treatment is generally adopted. Authors with hemodynamically unstable or recurrent heart failure generally give first-line supportive care. Concurrent or non-concurrent use of positive inotropic drugs with hormones may restore myocardial function but may also lead to hemodynamic decompensation and even death. Therefore, in the acute phase, especially for refractory heart failure patients, mechanical support is currently generally recommended, including: by intra-aortic balloon counterpulsation, percutaneous cardiopulmonary support system, ventricular assist device, and extracorporeal membrane oxygenation.

The trans-aortic internal balloon counterpulsation is characterized by that 1 catheter with balloon is placed in the descending aorta of left subclavian artery and far end of renal artery opening by means of arterial system, and the far end of said catheter is connected with counterpulsation instrument. The air bag inflates in diastole and exhausts in systole, thereby playing a role of assisting the heart pump, reducing the pressure in the descending aorta, reducing the afterload of the heart, reducing the oxygen consumption of the myocardium, reducing the work of the heart, increasing the pressure in the descending aorta in diastole, increasing the perfusion of the coronary artery in diastole, and restoring the function of the inhibited or ischemic myocardium. The impact of IABP on blood pressure and coronary (coronary) blood flow is dependent on the function of the patient's left ventricle and provides only minimal circulatory support for patients with a complete hemodynamic collapse.

The percutaneous cardiopulmonary support system (PCPS) is an effective bedside assisted circulatory support system developed in recent years, and is one of the forms of extracorporeal circulation (cardiopulmonary bypass). The system establishes a pipeline by a percutaneous puncture method, and oxygenizes erythrocytes by an oxygen synthesizer to replace the function of a lung; the centrifugal pump is used for generating circulating power to replace the contraction function of the left ventricle so as to help the patient to spend the dangerous period. However, the left heart assist effect in PCPS is not satisfactory, and particularly, the afterload problem due to flow assist cannot be eliminated, and therefore, close attention should be paid to cases of severe left heart insufficiency. The complications accompanying PCPS are mainly cardiovascular complications caused by catheterization and thrombus infarction or hemorrhage caused by auxiliary circulation. PCPS is generally only suitable for use in emergency, short-term assisted cycles, and is not adequate for the recovery of extremely poor cardiac function.

The Ventricle Auxiliary Device (VAD) can drain blood of an atrium or a ventricle to the auxiliary device, and the blood is pumped by the blood pump and then is returned to an arterial system to play a role in partially or completely replacing the heart to do work and maintaining blood circulation. Implantable LVADs implant a blood pump into the body of a patient (the peritoneal cavity or extraperitoneal space), requiring a transcutaneous conduit to supply energy and compensate for volume changes in the body's blood pump. Can be used only once. Significantly increasing the cost of use.

The essence of extracorporeal membrane pulmonary oxygenation (ECMO) is an improved artificial heart-lung machine, the most central parts being the membrane lung and the blood pump, which function as artificial lung and artificial heart, respectively. In ECMO operation, blood is drawn from the vein and passes through the membrane lungs to absorb oxygen and remove carbon dioxide. The blood, after gas exchange, can be returned to the vein (VV access) and also to the artery (VA access) under the push of the pump. The former is mainly used for external respiration support, and the latter can be used for external respiration support and cardiac support because the blood pump can replace the blood pumping function of the heart. When the patient's lung function is severely impaired and ineffective for routine treatment, ECMO can assume the role of gas exchange, leaving the lungs in a resting state, gaining valuable time for the patient's recovery. And when the cardiac function of the patient is seriously damaged, the blood pump can replace the cardiac pumping function to maintain the blood circulation. ECMO is currently considered the leading technology supported by extracorporeal circulation. However, the complexity of the operation cannot be applied to the auxiliary support of the urgent heart failure, so that the method has certain limitation in use. In addition, ECMO equipment is too expensive.

In the prior art, the aortic internal balloon counterpulsation, the percutaneous cardiopulmonary support system, the left ventricle auxiliary device and the extracorporeal membrane pulmonary oxygenation all have respective limitations on the circulatory support in the rescue process of the fulminant myocarditis. Therefore, there is a need to solve the above problems in the devices and to develop an assisted circulation system which is simple to implant and remove, has little physical trauma to the patient, is suitable for patients requiring temporary circulation support, and has high utility for clinical treatment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a percutaneous left heart auxiliary circulation system has the hemodynamics that can stabilize the patient according to cardiogenic shock patient's electrocardiosignal, breaks the vicious circle that cardiogenic shock leads to can avoid the multiple organ function failure that cardiogenic shock brought, and little to the wound of patient's health, be convenient for carry out the effect that the circulation was supported temporarily to the patient.

The above technical purpose of the present invention can be achieved by the following technical solutions: a percutaneous left heart auxiliary circulation system comprises a double-cavity blood pump and a main controller used for controlling the operation of the double-cavity blood pump; the main controller is connected with an electrocardio monitor for monitoring electrocardiosignals of the heart; the double-cavity blood pump comprises an inflow cavity, an outflow cavity connected with the inflow cavity and a blood pump power system connected with the main controller; the inflow cavity is connected with a blood introducing pipe, and the end part of the blood introducing pipe, which is far away from the double-cavity blood pump, is placed into the left atrium; the outflow cavity is connected with a blood outflow pipe, and the end part of the outflow pipe, which is far away from the double-cavity blood pump, is placed into the aorta from one side or two sides of femoral artery; a one-way mechanical valve is arranged between the outflow cavity and the blood outflow tube.

By adopting the technical scheme, the electrocardiosignal of the patient can be conveniently monitored in real time through the electrocardiosignal monitor in the process of treating the patient by using the percutaneous left heart auxiliary circulation system; then, the electrocardio monitor transmits the monitored electrocardiosignals of the patient to the main controller, the main controller analyzes and processes the electrocardiosignals after receiving the electrocardiosignals of the patient, and then the main controller sends control command signals to a blood pump power system in the dual-cavity blood pump according to the electrocardiosignals and controls the blood pump power system to work according to the electrocardiosignals; through the work of the blood pump power system, the blood can be extracted by the double-cavity blood pump to provide power. Under the suction effect of the dual-cavity blood pump, oxygenated blood at the left atrium of the heart can be sucked into the inflow cavity of the dual-cavity blood pump through the blood introducing pipe; by the inflow lumen, storing oxygenated blood drawn from the left atrium is facilitated; the flowing-out cavity is connected with the flowing-in cavity, so that oxygenated blood stored in the flowing-in cavity can be conveniently pumped into the flowing-out cavity, and then the oxygenated blood in the flowing-out cavity is pumped out of the flowing-out cavity to the blood flowing-out pipe; through the blood outflow tube, the oxygenated blood is convenient to be conveyed to the aorta; the unidirectional mechanical valve is convenient for the oxygenated blood to flow in a unidirectional way; through the double-cavity blood pump, the blood introducing pipe, the blood outflow pipe, the main controller for controlling the double-cavity blood pump and the electrocardio monitor connected with the main controller, oxygenated blood in the left atrium of a patient can be extracted to the aorta according to the set period, the set rotating speed and the set time according to electrocardiosignals of the patient, so that the patient suffering from fulminant myocarditis combined with cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock is assisted to support, the heart load of the patient during cardiogenic shock is reduced, and the blood perfusion in the aorta is increased.

The utility model discloses further set up to: the blood pump power system comprises a driving device and a power supply device which are connected with the main controller, and the power supply device is connected with the driving device; the driving device is a mechanical relaxing and shrinking system connected with the main controller; the mechanical relaxing and shrinking system comprises an extrusion cavity and a hydraulic cavity which are positioned in the outflow cavity; a liquid pump connected with the main controller and the power supply device is arranged in the hydraulic cavity; an elastic membrane is arranged between the extrusion cavity and the hydraulic cavity; the power supply device comprises an external power supply interface and a built-in battery.

By adopting the technical scheme, the mechanical comfort system consisting of the extrusion cavity, the hydraulic cavity and the liquid pump positioned in the hydraulic cavity is convenient for providing driving force for the dual-cavity blood pump, so that the blood is sucked; in the process of blood suction, the main controller sends control information to the liquid pump in the hydraulic cavity and controls the liquid pump to work; the liquid in the hydraulic cavity is sucked or discharged through the working of the liquid pump, so that the blood in the extrusion cavity is formed to transfer pressure, and the blood flow is generated; the power supply device is convenient for supplying power for the work of the mechanical relaxing and shrinking system; through the power supply device consisting of the external power supply interface and the built-in battery, the double-cavity blood pump is convenient to meet the dual requirements of long-time fixed work and short-time movable work.

The utility model discloses further set up to: the length of the blood introducing pipe is 74-76 cm; the blood introducing pipe is provided with a first filter which is 5cm away from the joint of the inflow chamber and the blood introducing pipe.

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

The utility model discloses further set up to: the length of the blood outflow tube is 84-86 cm; the blood outflow pipe is provided with a second filter, and the distance between the second filter and the connection part of the blood outflow pipe and the outflow cavity is 5 cm.

Through adopting above-mentioned technical scheme, through the second filter, can prevent that little thrombus in the oxygenation blood from getting into systemic circulation through flowing out the chamber.

The utility model discloses further set up to: the inflow cavity is connected with the outflow cavity through a medical catheter; the medical catheter is provided with a first check valve; the blood outflow tube is provided with a second check valve located between the second filter and the outflow lumen.

By adopting the technical scheme, the medical catheter is convenient for oxygenated blood flowing into the cavity to enter the outflow cavity; the first check valve is used for preventing the oxygenated blood from flowing reversely from the inflow cavity to the outflow cavity; the second check valve is convenient for preventing the oxygenated blood from flowing reversely from the outflow cavity to the aorta through the blood outflow tube.

The utility model discloses further set up to: the blood outflow tube is a 17F or two 15F polyurethane catheters.

By adopting the technical scheme, the blood outflow tube has good extensibility and flexibility resistance through the 17F or two 15F polyurethane catheters; meanwhile, the polyurethane catheter is used as the blood outflow tube, so that the blood outflow tube has the characteristics of good biocompatibility, good blood compatibility and good antithrombotic property, and blood components cannot be damaged.

The utility model discloses further set up to: the blood introducing pipe is a 21F polyurethane catheter; the head end of the blood introducing pipe is provided with 1 end hole and a plurality of side holes.

By adopting the technical scheme, the 21F polyurethane catheter is adopted as the blood outflow tube, so that the blood introduction tube has the characteristics of good biocompatibility, good blood compatibility and good antithrombotic property, and the blood components can not be damaged; through 1 end hole and a plurality of side hole of blood introducing tube head end, in the two-chamber blood pump working process, the oxygenation blood of being convenient for heart left atrium department can get into the blood introducing tube smoothly.

The utility model discloses further set up to: the blood outflow tube is provided with a water filling saccule at the abdominal aorta above the common iliac artery.

By adopting the technical scheme, the water filling balloon is convenient for reducing or preventing the supply of blood to the lower limbs in a short time, thereby ensuring the preferential blood supply of important organs such as heart, brain, kidney and the like.

The utility model discloses further set up to: the main controller is connected with a pressure sensor and a warning device for detecting the blood pressure; the pressure sensor is connected with the blood outflow pipe; the alarm is connected with the outer wall of the double-cavity blood pump.

By adopting the technical scheme, the pressure of blood flow can be conveniently monitored by the pressure sensor; the pressure sensor transmits the monitored blood flow pressure information to the main controller, the main controller analyzes and processes the blood flow pressure information after receiving the blood flow pressure information, and controls and adjusts parameters such as the working period, the rotating speed, the working time and the like of a liquid pump in the mechanical relaxation system according to the blood flow pressure information, so that the operation of the whole auxiliary circulation system is regulated and controlled; meanwhile, the main controller sends control command information to the warning device according to the blood flow pressure information monitored by the pressure sensor and controls the warning device to work to send warning sound, so that the attention of a doctor is attracted.

The utility model discloses further set up to: the double-cavity blood pump is provided with an inner layer and an outer layer; the inner layer and the outer layer are seamlessly embedded through negative pressure; the outer layer is connected with a blood pump power system.

Through adopting above-mentioned technical scheme, through the inlayer and the skin of negative pressure seamless gomphosis, the replacement at any time of the inlayer of being convenient for to can reduce the use cost of physiology type percutaneous left heart auxiliary circulation system.

To sum up, the utility model discloses following beneficial effect has: the electrocardiosignal of the patient can be conveniently monitored in real time through the electrocardioscanner; then, the electrocardio monitor transmits the monitored electrocardiosignals of the patient to the main controller, the main controller analyzes and processes the electrocardiosignals after receiving the electrocardiosignals of the patient, and then the main controller sends control command signals to a blood pump power system in the dual-cavity blood pump according to the electrocardiosignals and controls the blood pump power system to work according to the electrocardiosignals; the blood pump power system is operated to provide power for the pumping action of the double-cavity blood pump; through the blood introducing pipe, the double-cavity blood pump can conveniently extract oxygenated blood at the left atrium of the heart; by the inflow lumen, storing oxygenated blood drawn from the left atrium is facilitated; the flowing-out cavity is connected with the flowing-in cavity, so that oxygenated blood stored in the flowing-in cavity can be conveniently pumped into the flowing-out cavity, and then the oxygenated blood in the flowing-out cavity is pumped out of the flowing-out cavity to the blood flowing-out pipe; through the blood outflow tube, the oxygenated blood is convenient to be conveyed to the aorta; the unidirectional mechanical valve is convenient for the oxygenated blood to flow in a unidirectional way; through the double-cavity blood pump, the blood introducing pipe, the blood outflow pipe, the main controller for controlling the double-cavity blood pump and the electrocardio monitor connected with the main controller, oxygenated blood in the left atrium of a patient can be extracted to the aorta according to the set period, the set rotating speed and the set time according to electrocardiosignals of the patient, so that the patient suffering from fulminant myocarditis combined with cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock can be supported in an auxiliary manner, the heart load of the patient during cardiogenic shock is reduced, and the blood perfusion in the aorta is increased.

Drawings

Fig. 1 is a schematic structural diagram in an embodiment of the present invention;

fig. 2 is a block diagram of the structure in the embodiment of the present invention;

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

In the figure: 1. a dual-lumen blood pump; 2. a main controller; 3. an electrocardioscanner; 4. an inflow chamber; 5. an outflow lumen; 6. a blood introduction tube; 7. a blood outflow tube; 8. a one-way mechanical valve; 9. a power supply device; 10. an extrusion chamber; 11. a hydraulic chamber; 12. a liquid pump; 13. an elastic film; 14. an external power interface; 15. a built-in battery; 16. a first filter; 17. a second filter; 18. a medical catheter; 19. a first check valve; 20. a second check valve; 21. an end hole; 22. a side hole; 23. a water-filled balloon; 24. a pressure sensor; 25. an alarm; 26. an outer layer; 27. an inner layer; 28. the left atrium; 29. the aorta.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-3.

Example (b): a percutaneous left heart auxiliary circulatory system is shown in figures 1, 2 and 3 and comprises a dual-cavity blood pump 1 and a main controller 2 for controlling the operation of the dual-cavity blood pump 1. The main controller 2 is connected with an electrocardio monitor 3 for monitoring the electrocardio signals of the heart, and the electrocardio monitor 3 is coupled with the main controller 2. The dual-chamber blood pump 1 comprises 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 to a blood inlet tube 6, which blood inlet tube 6 is placed in the left atrium 28 away from the end of the dual-chamber blood pump 1. The outflow cavity 5 is connected with a blood outflow tube 7, and the end of the outflow tube far away from the double-cavity blood pump 1 is placed into the aorta 29 from one side or two sides of the femoral artery. A one-way mechanical valve 8 is arranged between the outflow cavity 5 and the blood outflow tube 7.

In the present embodiment, the main controller 2 is an embedded microprocessor. Blood introduction tube 6 ascends through the femoral vein to the right atrium, and then punctures through the interatrial septum and is placed into left atrium 28. In the process of treating the patient by using the percutaneous left heart auxiliary circulation system, the electrocardiosignal of the patient can be conveniently monitored in real time through the electrocardiosignal monitor 3. Then, the electrocardiosignal of the patient monitored by the electrocardioscanner 3 is transmitted to the main controller 2, the electrocardiosignal of the patient is analyzed and processed after being received by the main controller 2, and then the main controller 2 sends a control command signal to the blood pump power system in the dual-cavity blood pump 1 according to the electrocardiosignal and controls the blood pump power system to work according to the electrocardiosignal. Through the work of the blood pump power system, the blood can be extracted by the double-cavity blood pump 1 to provide power. Under the suction effect of the dual-chamber blood pump 1, 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 alone via the blood inlet tube 6. By flowing into the chamber 4, it is convenient to store oxygenated blood drawn from the left atrium 28. The flow and transfer of oxygenated blood within the inflow lumen 4 is facilitated by the outflow lumen 5 connected to the inflow lumen 4, and the oxygenated blood pump 12 within the outflow lumen 5 is then moved out of the outflow lumen 5 to the blood outflow tube 7. The delivery of oxygenated blood to the aorta 29 is facilitated by the blood outflow tube 7. The unidirectional mechanical valve 8 is convenient for the oxygenated blood to flow in a unidirectional way. Through the double-cavity blood pump 1, the blood introducing pipe 6, the blood outflow pipe 7, the main controller 2 for controlling the double-cavity blood pump 1 and the electrocardio monitor 3 connected with the main controller 2, oxygenated blood in the left atrium 28 of the patient can be extracted to the aorta 29 according to the set period, the set rotating speed and the set time according to the electrocardio signals of the patient, so that the patient suffering from fulminant myocarditis combined cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock can be supported in an auxiliary manner, the cardiac load of the patient during cardiogenic shock is reduced, and the blood perfusion in the aorta 29 is increased.

The blood pump power system comprises a driving device and a power supply device 9 which are connected with the main controller 2, and the power supply device 9 is connected with the driving device. The driving device is a mechanical relaxing and shrinking system connected with the main controller 2. The mechanical relaxation system comprises a pressing chamber 10 and a hydraulic chamber 11 located in the outflow chamber 5. A liquid pump 12 connected to the main controller 2 and the power supply device 9 is installed in the hydraulic chamber 11. The pressing chamber 10 is separated from the hydraulic chamber 11 by an elastic membrane 13. The power supply device 9 comprises an external power supply interface and an internal battery 15.

In this embodiment, the liquid pump 12 is a speed adjustable miniature self priming pump 12. The elastic membrane 13 is a bioprotein membrane having a large elastic coefficient and capable of withstanding nearly ten thousand elastic deformations. The built-in battery 15 is a micro battery. The mechanical comfort system consisting of the extrusion cavity 10, the hydraulic cavity 11 and the liquid pump 12 positioned in the hydraulic cavity 11 is convenient for providing driving force for the dual-cavity blood pump 1, thereby realizing the suction work of blood. During the blood suction, the main controller 2 sends control information to the liquid pump 12 in the hydraulic chamber 11 and controls the liquid pump 12 to operate. By the operation of the liquid pump 12, the liquid in the hydraulic chamber 11 is sucked or discharged, thereby forming a blood transfer pressure in the pressing chamber 10, and generating a blood flow. And the power supply device 9 is convenient for supplying power for the work of the mechanical relaxing and shrinking system. Through the power supply unit 9 composed of the external power supply interface and the built-in battery 15, the dual-cavity blood pump 1 is convenient to meet the dual requirements of long-time fixed work and short-time movable work.

The length of the blood introducing tube 6 is 74 to 76 cm. The blood introducing tube 6 is provided with a first filter 16, and the first filter 16 is 5cm from the junction of the inflow chamber 4 and the blood introducing tube 6.

In this embodiment, small emboli in the oxygenated blood drawn from the left atrium 28 of the heart are prevented from entering the inflow lumen 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 5cm away from the junction of the blood outflow tube 7 and the outflow lumen 5.

In this embodiment, small thrombi in the oxygenated blood can be prevented from entering the systemic circulation through the outflow lumen 5 by the second filter 17.

The inflow lumen 4 and the outflow lumen 5 are connected by a medical catheter 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, the second check valve 20 being located between the second filter 17 and the outflow chamber 5.

In the present embodiment, the medical catheter 18 is a polyurethane catheter. Through the medical catheter 18, oxygenated blood that is convenient to flow into the lumen 4 can enter the outflow lumen 5. The first check valve 19 facilitates the prevention of the backflow of oxygenated blood from the inflow chamber 4 into the outflow chamber 5. The second check valve 20 facilitates the prevention of backflow 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 tubes.

In the present example, F is a symbol in the French measurement system and represents the diameter of the blood outflow tube 7, wherein 1F is 1/3 of 1mm, so that the diameter 1F ≈ 0.33 mm. The blood outflow tube 7 has good extensibility and flexibility resistance through one 17F or two 15F polyurethane catheters. Meanwhile, the polyurethane catheter is adopted as the blood outflow tube 7, so that the blood outflow tube 7 has the characteristics of good biocompatibility, good blood compatibility and good antithrombotic property, and blood components cannot be damaged.

The blood introducing tube 6 is a 21F polyurethane catheter. The head end of the blood introducing tube 6 is provided with 1 end hole 21 and a plurality of side holes 22.

In the present example, F is a symbol in the French measurement system and represents the diameter of the blood outflow tube 7, wherein 1F is 1/3 of 1mm, so that the diameter 1F ≈ 0.33 mm. The polyurethane catheter with the diameter of 21F is adopted as the blood outflow tube 7, so that the blood introducing tube 6 has the characteristics of good biocompatibility, good blood compatibility and good antithrombotic property, and the blood components can not be damaged. Through the 1 end hole 21 and the plurality of side holes 22 at the head end of the blood introducing tube 6, in the working process of the dual-chamber blood pump 1, oxygenated blood at the left atrium 28 of the heart can smoothly enter the blood introducing tube 6.

The blood outflow tube 7 is provided with a water-filled balloon 23 through the abdominal aorta 29 above the common iliac artery.

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

The main controller 2 is connected with a pressure sensor 24 for detecting the blood pressure and an alarm 25; the pressure sensor 24 is connected with the blood outflow tube; the alarm 25 is connected with the outer wall of the double-cavity blood pump 1.

In the present 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, the main controller 2 analyzes and processes the blood flow pressure information after receiving the blood flow pressure information, and controls and adjusts parameters such as the working period, the rotating speed and the working time of the liquid pump 12 in the mechanical comfort system according to the blood flow pressure information, so that the operation of the whole auxiliary circulation system is regulated and controlled. Meanwhile, the main controller 2 sends control command information to the alarm 25 according to the blood pressure information monitored by the pressure sensor 24, and controls the alarm 25 to work to send out an alarm sound, so as to attract the attention of a doctor.

The double-cavity 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 a blood pump power system.

In the present embodiment, the inner layer 27 and the outer layer 26, which are seamlessly fitted under negative pressure, facilitate the replacement of the inner layer 27 at any time, and thus the use cost of the physiological percutaneous left heart assist circulatory system can be reduced.

The working principle is as follows: in the process of treating the patient by using the percutaneous left heart auxiliary circulation system, the electrocardiosignal of the patient can be conveniently monitored in real time through the electrocardiosignal monitor 3. Then, the electrocardiosignal of the patient monitored by the electrocardioscanner 3 is transmitted to the main controller 2, the electrocardiosignal of the patient is analyzed and processed after being received by the main controller 2, and then the main controller 2 sends a control command signal to the blood pump power system in the dual-cavity blood pump 1 according to the electrocardiosignal and controls the blood pump power system to work according to the electrocardiosignal. The operation of the blood pump power system is convenient for providing power for the pumping action of the double-cavity blood pump 1. Through the blood inlet tube 6, the dual-chamber blood pump 1 can extract oxygenated blood at the left atrium 28 of the heart. By flowing into the chamber 4, it is convenient to store oxygenated blood drawn from the left atrium 28. The outflow chamber 5 connected to the inflow chamber 4 facilitates the flow of the oxygenated blood pump 12 stored in the inflow chamber 4 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 by the blood outflow tube 7. The unidirectional mechanical valve 8 is convenient for the oxygenated blood to flow in a unidirectional way. Through the double-cavity blood pump 1, the blood introducing pipe 6, the blood outflow pipe 7, the main controller 2 for controlling the double-cavity blood pump 1 and the electrocardio monitor 3 connected with the main controller 2, oxygenated blood in the left atrium 28 of the patient can be extracted to the aorta 29 according to the set period, the set rotating speed and the set time according to the electrocardio signals of the patient, so that the patient suffering from fulminant myocarditis combined cardiogenic shock or acute myocardial infarction complicated with cardiogenic shock can be supported in an auxiliary manner, the cardiac load of the patient during cardiogenic shock is reduced, and the blood perfusion in the aorta 29 is increased.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A percutaneous left heart auxiliary circulation system is characterized in that: comprises a double-cavity blood pump (1) and a main controller (2) for controlling the operation of the double-cavity blood pump (1); the main controller (2) is connected with an electrocardio monitor (3) for monitoring electrocardiosignals of the heart; the double-cavity blood pump (1) comprises an inflow cavity (4), an outflow cavity (5) connected with the inflow cavity (4) and a blood pump power system connected with the main controller (2); the inflow cavity (4) is connected with a blood introducing pipe (6), and the end part of the blood introducing pipe (6) far away from the double-cavity blood pump (1) is placed into the left atrium (28); the outflow cavity (5) is connected with a blood outflow pipe (7), and the end part of the outflow pipe, which is far away from the double-cavity blood pump (1), is placed into an aorta (29) from one side or two sides of femoral artery; a one-way mechanical valve (8) is arranged between the outflow cavity (5) and the blood outflow tube (7).

2. The percutaneous left heart assisted circulatory system of claim 1, wherein: the blood pump power system comprises a driving device and a power supply device (9) which are connected with the main controller (2), and the power supply device (9) is connected with the driving device; the driving device is a mechanical relaxing and shrinking system connected with the main controller (2); the mechanical relaxing and shrinking system comprises an extrusion cavity (10) and a hydraulic cavity (11) which are positioned in the outflow cavity (5); a liquid pump (12) connected with the main controller (2) and the power supply device (9) is arranged in the hydraulic cavity (11); an elastic membrane (13) is arranged between the extrusion cavity (10) and the hydraulic cavity (11); the power supply device (9) comprises an external power supply interface and a built-in battery (15).

3. The percutaneous left heart assisted circulatory system of claim 1, wherein: the length of the blood introducing pipe (6) is 74-76 cm; the blood introducing pipe (6) is provided with a first filter (16), and the distance between the first filter (16) and the connection part of the inflow cavity (4) and the blood introducing pipe (6) is 5 cm.

4. The percutaneous left heart assisted circulatory system of claim 3, wherein: 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 distance between the second filter (17) and the connection part of the blood outflow tube (7) and the outflow cavity (5) is 5 cm.

5. The percutaneous left heart assisted circulatory system of claim 1, wherein: the inflow cavity (4) is connected with the outflow cavity (5) through a medical catheter (18); the medical catheter (18) is provided with a first check valve (19); the blood outflow tube (7) is provided with a second non-return valve (20), the second non-return valve (20) being located between the second filter (17) and the outflow chamber (5).

6. The percutaneous left heart assisted circulatory system of claim 1, wherein: the blood outflow tube (7) is a 17F or two 15F polyurethane catheters.

7. The percutaneous left heart assisted circulatory system of claim 1, wherein: the blood introducing pipe (6) is a 21F polyurethane catheter; the head end of the blood introducing pipe (6) is provided with 1 end hole (21) and a plurality of side holes (22).

8. The percutaneous left heart assisted circulatory system of claim 1, wherein: the blood outflow pipe (7) is provided with a water filling saccule (23) through the abdominal aorta (29) above the common iliac artery.

9. The percutaneous left heart assisted circulatory system of claim 1, wherein: the main controller (2) is connected with a pressure sensor (24) for detecting the blood pressure and an alarm (25); the pressure sensor (24) is connected with the blood outflow pipe; the alarm (25) is connected with the outer wall of the double-cavity blood pump (1).

10. The percutaneous left heart assisted circulatory system of claim 1, wherein: the double-cavity blood pump (1) is provided with an inner layer (27) and an outer layer (26); the inner layer (27) and the outer layer (26) are seamlessly embedded through negative pressure; the outer layer (26) is connected with a blood pump power system.