CN116617556A - Pneumatic driving system for push type double-core auxiliary device - Google Patents
Pneumatic driving system for push type double-core auxiliary device Download PDFInfo
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- CN116617556A CN116617556A CN202210126985.7A CN202210126985A CN116617556A CN 116617556 A CN116617556 A CN 116617556A CN 202210126985 A CN202210126985 A CN 202210126985A CN 116617556 A CN116617556 A CN 116617556A
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- 238000007906 compression Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
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- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
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- 230000009977 dual effect Effects 0.000 claims 2
- 210000005077 saccule Anatomy 0.000 abstract description 12
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- 239000008280 blood Substances 0.000 description 10
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- 210000005240 left ventricle Anatomy 0.000 description 5
- 210000005241 right ventricle Anatomy 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000034225 regulation of ventricular cardiomyocyte membrane depolarization Effects 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
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- 206010003178 Arterial thrombosis Diseases 0.000 description 1
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- 206010019280 Heart failures Diseases 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
- A61M60/191—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart mechanically acting upon the outside of the patient's native heart, e.g. compressive structures placed around the heart
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/295—Balloon pumps for circulatory assistance
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/497—Details relating to driving for balloon pumps for circulatory assistance
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Mechanical Engineering (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
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Abstract
The invention provides a pneumatic drive system for a push-type double-heart auxiliary device, the push-type double-heart auxiliary device comprises at least one working balloon, the pneumatic drive system comprises: the device comprises an air pump, an accumulator, an electromagnetic valve and a control unit; the air pump pumps working gas into the accumulator, and the control unit controls the switch of the air pump; the control unit receives and recognizes an electrocardiogram signal of a patient, and in the ventricular systole, the electromagnetic valve is opened, and working gas in the accumulator is filled into the working saccule to realize the pressing of the ventricle; in ventricular diastole, closing the electromagnetic valve, stopping inflating the working saccule, and discharging the compressed air in the working saccule through the electromagnetic valve; during the venting phase of the working balloon, the air pump pumps working gas back into the accumulator. According to the invention, through the design of the air pump pressure accumulator, the requirement on the power of the air pump can be greatly reduced, and the system is convenient to miniaturize, portable and low in power consumption.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an air pressure driving system for a push type double-heart auxiliary device.
Background
The current ventricular assist device generally adopts an axial flow pump and a centrifugal pump to directly apply work to blood flow, and improves the flow speed and pressure of the blood flow so as to assist the left ventricle or the right ventricle. Wherein, the above-mentioned ventricular assist device has some components (such as pump case, impeller, pressurizing film, blood inflow/outflow pipeline, etc.) that are in direct contact with human blood, because these artificial materials are in contact with blood and output driving force to blood, it is easy to cause blood compatibility risks, such as: coagulation and hemolysis. Adverse events such as peripheral arterial thrombosis, visceral hemorrhage, and even patient death occur after device implantation.
In recent years, many companies and research institutions have developed non-blood direct contact ventricular assist devices. By periodic compressions to the heart, ejection assistance power is provided. Because such devices are not in contact with blood, blood compatibility risks can be effectively avoided. The implantation of the device can not cause permanent damage to myocardial tissues, is more beneficial to the recovery of heart functions of heart failure patients, is more beneficial to the advanced treatment and improves the long-term survival rate of the patients.
AdjuCor, germany, developed AdjuCor BEAT (non-blood direct contact ventricular assist) which comprises a telescopic balloon driven by compressed air, a sheath containing a metallic support mesh, a gas line connected to an extracorporeal controller, and an extracorporeal controller. Wherein, the outer side of the sheath has larger rigidity, and the inner side has smaller rigidity. The telescopic saccule is arranged between the outer wall of the heart and the sheath, and the telescopic saccule is tightly attached to the outer wall of the heart. Because the rigidity of the outer side of the sheath is higher, the shape of the sheath is generally fixed, so that the compression of the ventricle is realized when the telescopic saccule is in a filling state under the drive of compressed air.
In the prior art, the telescopic balloon needs to be rapidly inflated by an air pump in each ventricular systole, and the telescopic balloon is externally exhausted in each ventricular diastole. The heart cycle was 0.8 seconds, with a ventricular systole averaging 0.27 seconds and a ventricular diastole averaging 0.53 seconds. The inflation and the exhaust of the telescopic saccule are realized in a short time, the requirement on the air pump is very high, and the air pump is required to realize the air storage and the exhaust in the heart cycle of 0.8 seconds.
In order to enable rapid inflation and deflation of the inflatable balloon, compressed air is typically used as the working medium. Because the air inflation and the air exhaust are required to be completed along with the beat of the heartbeat, a large-flow air pump is required to be used, and the simple theory is calculated as follows: it is known that: 1) Heart displacement: 5L/min; 2) Heart rate: 75 times/min; 3) The heart cycle is 0.8 seconds, wherein the ventricular systole averages 0.27 seconds and the ventricular diastole averages 0.53 seconds; 4) Pulse output: 5000mL/75 times = 66.67mL; 5) Ventricular pressure during ventricular rapid ejection is 120mmHg.
If a single air pump and single valve is used to drive the operation of the telescopic balloon, in order to support 60% of the pulse output and consider the combined ejection volume of the left and right ventricles, then a rapid inflation is required during each ventricular systole: 66.67×2× (120/760) ×60% =12.63 mL. Converting the flow of the air outlet pump: 12.63/0.27= 46.79 mL/sec=2.81L/min.
If an air pump with the flow rate of more than 2.81L/min is directly arranged, the size, the power consumption and the portability of the system are extremely unfavorable.
Disclosure of Invention
The invention aims to provide an air pressure driving system for a push type double-heart auxiliary device, which can realize the push of the push type double-heart auxiliary device to a ventricle by adopting the design of an air pump and an accumulator, and is beneficial to the portability and low power consumption of the system.
To solve the above technical problem, the present invention provides an air pressure driving system for a push type dual-heart auxiliary device, the push type dual-heart auxiliary device includes at least one working balloon, the air pressure driving system includes: the device comprises an air pump, an accumulator, an electromagnetic valve and a control unit; wherein,,
the air pump pumps working gas into the accumulator, and the control unit controls the switch of the air pump;
the control unit receives and recognizes an electrocardiogram signal of a patient, and opens the electromagnetic valve in the ventricular systole, and the working gas in the accumulator is filled into the working balloon to realize the compression of the ventricle; in ventricular diastole, the control unit closes the electromagnetic valve to stop the inflation of the working balloon, and the working balloon discharges the working gas inside the working balloon through the electromagnetic valve;
during the venting phase of the working balloon, the air pump pumps working gas back into the accumulator.
Optionally, the pneumatic driving system comprises at least one air pump, at least two accumulators and at least two electromagnetic valves, the electromagnetic valves are in one-to-one correspondence with the accumulators, and the electromagnetic valves are connected in parallel.
Optionally, at least two of the accumulator wheels are inflated to the working balloon to ensure that at least one of the accumulators inflates the working balloon during the ventricular systole.
Optionally, the pneumatic drive system includes two air pumps and two accumulators.
Optionally, the pneumatic driving system comprises two electromagnetic valves, two electromagnetic valves are connected in series, one electromagnetic valve is connected to the two pressure accumulators respectively to select the pressure accumulators for inflating the working balloon, and the other electromagnetic valve is connected to the working balloon to control inflation and exhaustion of the working balloon.
Optionally, N ventricular systoles are consecutive, one of the accumulators inflates the working balloon, followed by M ventricular systoles, the other accumulator inflates the working balloon, where N is greater than or equal to 1, M is greater than or equal to 1, and M is equal to N.
Optionally, N ventricular systoles are continuous, one of the accumulators inflates the working balloon, and then M ventricular systoles are continuous, the other accumulator inflates the working balloon, where N is greater than or equal to 1, M is greater than or equal to 1, and M is not equal to N.
Optionally, the air pump comprises a plunger type air pump or a turbine air pump driven by a miniature direct current motor; the electromagnetic valve comprises a two-position three-way electromagnetic valve or a three-position three-way electromagnetic valve.
Optionally, the accumulator comprises a metal, a polymer material or a composite material; the shape of the accumulator comprises a cylinder, a sphere or a spherical cap.
Optionally, the accumulator material comprises a composite material with carbon fiber or glass fiber reinforcement.
Optionally, the air pump and the electromagnetic valve are replaceable components.
Optionally, the pneumatic driving system further comprises a power supply, and the power supply supplies power to the air pump and the control unit.
In the pneumatic driving system for the push type double-heart auxiliary device, the air pump pumps working gas into the accumulator, the control unit controls the opening and closing of the electromagnetic valve according to the electrocardiogram signal of a patient so as to charge the working gas in the accumulator into the working balloon in the ventricular systole, the working balloon discharges the working gas in the working balloon in the ventricular diastole, and the air pump pumps the working gas into the accumulator again in the exhaust stage of the working balloon.
Furthermore, the invention adopts the design of two air pumps and two pressure accumulators to form two sets of air inflation systems, and the two sets of air inflation systems alternately work, so that the air pump with small volume can be selected, the equipment is convenient to carry, and the consumption of high-pressure gas can be reduced after the small air pump is replaced, thereby realizing low-power consumption control.
Furthermore, the invention adopts two electromagnetic valves connected in parallel, thus realizing the backup design of the air path and improving the reliability of the system; meanwhile, the volume is smaller, and low-power consumption control can be realized; and the time length ratio of inflation pressure storage can be further increased, a smaller air pump can be selected, and the system size is further reduced.
Furthermore, the invention adopts two electromagnetic valves to be connected in series, the volume is smaller, and the low-power consumption control can be realized; and the time length ratio of inflation pressure storage can be further increased, a smaller air pump can be selected, and the system size is further reduced.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention.
FIG. 1 is a schematic diagram of a push-type dual-core assist apparatus system;
FIG. 2 is a schematic cross-sectional view of FIG. 1 in the AA direction during ventricular diastole;
FIG. 3 is a schematic cross-sectional view of FIG. 1 in the AA direction during ventricular systole;
FIG. 4 is a schematic diagram of a patient's electrocardiogram signal;
FIG. 5 is a block diagram of a pneumatic drive system according to an embodiment of the present invention;
FIG. 6 is a block diagram of a pneumatic drive system according to an embodiment of the present invention;
FIG. 7 is a block diagram of a pneumatic drive system according to an embodiment of the present invention;
fig. 8 is a block diagram of a pneumatic driving system according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
As used in this disclosure, the singular forms "a," "an," and "the" include plural referents, the term "or" are generally used in the sense of comprising "and/or" and the term "several" are generally used in the sense of comprising "at least one," the term "at least two" are generally used in the sense of comprising "two or more," and the term "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or number of features indicated. Thus, a feature defining "a first", "a second", and "a third" may include one or at least two of the feature, either explicitly or implicitly, unless the context clearly dictates otherwise.
Fig. 1 is a schematic diagram of a push-type dual-heart assist device system, fig. 2 is a schematic diagram of a cross section of fig. 1 in the AA direction during diastole, and fig. 3 is a schematic diagram of a cross section of fig. 1 in the AA direction during systole. As shown in fig. 1 to 3, the push type twin-heart assist device includes an implantable push balloon 1, a connection catheter 2, and an external controller 3, the push balloon 1 is implanted in a patient, and is connected to the external controller 3 through the connection catheter 2. The compression balloon 1 is designed with an adjustable function, comprising at least one working balloon 103 and at least one support balloon 104, for example comprising three working balloons 103 and three support balloons 104. The working balloon 103 directly applies auxiliary pressing force to the ventricle through working medium (gas or liquid), the working balloon 103 is communicated with the connecting catheter 2, and the working medium enters or exits the working balloon 103 through the connecting catheter 2 so as to realize pressing or loosening of the working balloon 103 to the heart. The supporting balloons 104 are used for fixing the heart, and the three supporting balloons 104 fix the heart in a certain area, so that the heart is prevented from twisting when the working balloon 103 presses the heart, and the heart pressing effect is reduced.
The external controller 3 can control the fluid pump or valve inside the patient by detecting the electrocardiogram signal (ECG) of the patient and follow the cardiac cycle of the patient, and periodically fill or discharge the working medium into or out of the working balloon 103 in the pressing balloon 1 through the connecting pipeline 2, so as to realize the application of auxiliary pressing force to the ventricle. The working rhythm of the working balloon 103 is determined according to an electrocardiogram signal, the electrocardiogram signal reaches a peak value, a working medium is injected, and the working balloon 103 presses the heart.
In fig. 1 to 3, the ventricles include a left ventricle 4 and a right ventricle 5, a left ventricle myocardium 401 surrounds the left ventricle 4, and a right ventricle myocardium 501 surrounds the right ventricle 5. An inner layer film 106 and an outer layer film 107 are also arranged outside the working balloon 103 and the support balloon 104.
In view of the above-mentioned push-type dual-heart assist device, the present invention provides a pneumatic driving system to drive the working balloon 103 to apply an assist push force to the ventricle.
Fig. 5 is a block diagram of a pneumatic driving system according to an embodiment of the present invention. Referring to fig. 5, the pneumatic driving system of the push-type dual-core auxiliary device provided by the present invention includes: the device comprises an air pump, an accumulator, an electromagnetic valve and a control unit; the control unit controls the switch of the air pump; the control unit receives and recognizes an electrocardiogram signal of a patient, and opens the electromagnetic valve in the ventricular systole, and the working gas in the accumulator is filled into the working balloon to press the ventricle; in ventricular diastole, the control unit closes the electromagnetic valve to stop the inflation of the working balloon, and the working balloon discharges the working gas inside the working balloon through the electromagnetic valve; during the venting phase of the working balloon, the air pump pumps working gas back into the accumulator.
Fig. 4 is a schematic diagram of a patient's electrocardiogram signal. As shown in fig. 4, the P wave indicates atrial depolarization, the PR interval indicates atrioventricular conduction time, the QRS group wave indicates ventricular depolarization, the ST segment indicates ventricular depolarization is complete, the T wave indicates ventricular repolarization, and the QT interval indicates the time from ventricular depolarization to complete repolarization. Since the electrocardiographic signal schematic is of the prior art known in the art, this will not be described in detail in the present invention.
Referring to fig. 4 and 5, the control unit opens the air pump, pumps working gas into the accumulator, and controls the switch of the air pump. In this embodiment, preferably, the working gas may be air, the air pump pumps the filtered air into the accumulator, compressed air is formed in the accumulator, and the air pump is turned off by the control unit when the pressure in the accumulator reaches a certain value.
The control unit controls the switching state of the solenoid valve in accordance with a beat (i.e., an electrocardiogram signal) synchronized with the heart cycle. The control unit receives and recognizes the electrocardiogram signal of the patient, and during the ventricular systole (QRST period in fig. 4), the control unit opens the electromagnetic valve, and the working gas in the accumulator is filled into the working balloon to realize the compression of the ventricle and assist the ventricle to complete the ejection. After the ejection of blood from the ventricle is completed, the control unit closes the electromagnetic valve to stop the inflation of the working balloon during diastole (TPQ period in fig. 4), and the working balloon discharges the working gas inside the working balloon through the electromagnetic valve to realize the discharge unloading and refill of the ventricle.
During the venting phase of the working balloon, the control unit opens the air pump, which pumps working gas back into the accumulator. The QRST period is the inflation working phase of the working balloon, and the TPQ period is the working balloon exhaust phase and the accumulator pressure storage phase, namely the exhaust pressure storage phase.
The pneumatic drive system further comprises a power supply, and the power supply supplies power to the air pump and the control unit. In this embodiment, the air pump includes a plunger type air pump or a turbine air pump driven by a micro dc motor. The accumulator material comprises metal, polymer material or composite material, preferably carbon fiber or glass fiber reinforced composite material. The accumulator shape comprises a cylinder, sphere or spherical cap to achieve miniaturization and high strength, high fatigue life. The electromagnetic valve generally selects a commercial three-position three-way electromagnetic valve or a two-position three-way electromagnetic valve, and has high reliability. Meanwhile, considering the service lives of the air pump and the electromagnetic valve, the air pump and the electromagnetic valve are arranged as part of replaceable components, and can be placed in a body or placed in a body. When the air pump and the electromagnetic valve are arranged outside the body, medical staff can conveniently replace the air pump and the electromagnetic valve for patients at regular intervals, so that the reliability of products is improved.
According to the invention, the working gas is pumped into the accumulator through the air pump, the control unit controls the opening and closing of the electromagnetic valve according to the electrocardiogram signal of the patient so as to charge the working gas in the accumulator into the working balloon in the ventricular systole, the working balloon discharges the working gas in the working balloon in the ventricular diastole, and the air pump pumps the working gas into the accumulator again in the exhaust stage of the working balloon, so that the requirement on the power of the air pump can be greatly reduced due to the design of the air pump accumulator, and the miniaturization, portability and low power consumption of the system are facilitated.
The pneumatic driving system comprises at least one air pump, at least two accumulators and at least two electromagnetic valves, wherein the electromagnetic valves are in one-to-one correspondence with the accumulators and are connected in parallel. At least two of the accumulator wheels are inflated to the working balloon to ensure that at least one of the accumulators inflates the working balloon during the ventricular systole. For example, the pneumatic driving system includes one air pump, two accumulators and two solenoid valves, one accumulator is connected with one solenoid valve, and the two solenoid valves are connected in parallel, and the air pump pumps working air into the two accumulators, respectively. Two accumulator wheels are inflated to the working balloon to ensure that one of the accumulators inflates the working balloon during the ventricular systole.
In this embodiment, the air pressure driving system including two air pumps and two accumulators will be described as an example. Referring to fig. 6, the pneumatic driving system includes two air pumps and two accumulators, wherein the air pump 1 and the accumulator 1 form a first inflation system, the air pump 2 and the accumulator 2 serve as a second inflation system, and both inflation systems are connected to an electromagnetic valve set. And the electromagnetic valve group is controlled by the control unit to realize the alternate work application and inflation pressure storage of the two pressure storages. It should be noted that the present invention is not limited to alternate work, for example: and (3) continuously inflating the working balloon by one accumulator for N ventricular systole, and continuously inflating the working balloon by the other accumulator for M ventricular systole, wherein N is greater than or equal to 1, M is equal to N, or M is not equal to N.
The invention adopts the design of two air pumps and two pressure accumulators to form two sets of air inflation systems, and the two sets of air inflation systems alternately work, so that the air pump with small volume can be selected, the equipment is convenient to carry, and the consumption of high-pressure gas can be reduced after the small air pump is replaced, thereby realizing low-power consumption control.
The two-position three-way electromagnetic valve has two states, and is inflated or exhausted, and the three-position three-way electromagnetic valve has three states, namely inflation, exhaust or maintenance. In this embodiment, the electromagnetic valve set includes two electromagnetic valves, which may be two-position three-way electromagnetic valves or three-position three-way electromagnetic valves. The two solenoid valves may be connected in parallel or in series, and the parallel connection and the series connection will be described below.
Fig. 7 is a block diagram of an air pressure driving system according to an embodiment of the present invention, as shown in fig. 7, the air pressure driving system includes two-position three-way electromagnetic valves, wherein the two-position three-way electromagnetic valve 1 is connected with the two-position three-way electromagnetic valve 2, the two-position three-way electromagnetic valve 1 is connected with the accumulator 1 and the air pump 1, and the two-position three-way electromagnetic valve 2 is connected with the accumulator 2 and the air pump 2. Both the two-position three-way electromagnetic valve 1 and the two-position three-way electromagnetic valve 2 are connected to the working balloon.
In the two-position three-way solenoid valve 1, a denotes connection to the working balloon, R denotes connection to the air source, and P denotes connection to the bleed port. When the two-position three-way electromagnetic valve 1 is arranged at the R position, the AR is switched on, the compressed gas in the accumulator 1 is filled into the working saccule through the two-position three-way electromagnetic valve 1, when the two-position three-way electromagnetic valve 1 is arranged at the P position, the AP is switched on, and the compressed air in the working saccule is discharged through the two-position three-way electromagnetic valve 1. The two-position three-way electromagnetic valve 2 is consistent with the working principle of the two-position three-way electromagnetic valve 1.
The invention adopts two-position three-way electromagnetic valves, two pressure accumulators and two air pumps, and the two-position three-way electromagnetic valves are connected in parallel, so that the backup design of an air path can be realized, and the reliability of the system is improved; meanwhile, the volume is smaller, and low-power consumption control can be realized; in addition, in the stage of inflating and working of the accumulator 1, the air pump 2 can still pump air to the accumulator 2, so that the time duty ratio of inflating and storing is further increased, a smaller air pump can be selected, and the system size is further reduced.
Fig. 8 is a block diagram of an air pressure driving system according to an embodiment of the present invention, as shown in fig. 8, the air pressure driving system includes two-position three-way electromagnetic valves, a two-position three-way electromagnetic valve 1 and a two-position three-way electromagnetic valve 2, the two-position three-way electromagnetic valve 1 is connected in series with the two-position three-way electromagnetic valve 2, the two-position three-way electromagnetic valve 1 is respectively connected to two accumulators, the accumulators 1 and 2, the accumulators 1 are connected to an air pump 1, the accumulators 2 are connected to the air pump 2, the two-position three-way electromagnetic valve 1 selects the accumulators for inflating the working balloon, and the two-position three-way electromagnetic valve 2 is connected to the working balloon to control inflation and exhaustion of the working balloon.
Specifically, the accumulator for inflating the working balloon is selected through the two-position three-way electromagnetic valve 1, when the two-position three-way electromagnetic valve 1 is at the 1 position, the accumulator 1 inflates the working balloon to do work, and when the two-position three-way electromagnetic valve 1 is at the 2 position, the accumulator 2 inflates the working balloon. The two-position three-way electromagnetic valve 2 is used for controlling the exhaust of the working saccule, when the two-position three-way electromagnetic valve 2 is arranged at the R position, the accumulator is used for inflating the working saccule to do work, and when the two-position three-way electromagnetic valve 2 is arranged at the P position, the working saccule is exhausted.
The invention adopts two three-way electromagnetic valves, two accumulators and two air pumps, the two three-way electromagnetic valves are connected in series, the volume is smaller, the low-power consumption control can be realized, in addition, in the stage of inflating and doing work of the accumulator 1, the air pump 2 can still inject air into the accumulator 2, the time duty ratio of inflating and storing pressure is further increased, a smaller air pump can be selected, and the system size is further reduced.
In this embodiment, the pneumatic driving system may further include a plurality of air pumps and two accumulators, where the plurality of air pumps are respectively connected to the two accumulators, so that the inflation pressure storage period of the single accumulator may be prolonged, and a smaller air pump may be selected, so as to further reduce the system size.
In summary, in the pneumatic driving system for a push type dual-heart auxiliary device provided by the embodiment of the invention, the air pump pumps the working gas into the accumulator, the control unit controls the opening and closing of the electromagnetic valve according to the electrocardiogram signal of the patient, so as to charge the working gas in the accumulator into the working balloon in the ventricular systole, discharge the working gas in the working balloon in the ventricular diastole, and pump the working gas into the accumulator again in the exhaust stage of the working balloon.
Furthermore, the invention adopts the design of two air pumps and two pressure accumulators to form two sets of air inflation systems, and the two sets of air inflation systems alternately work, so that the air pump with small volume can be selected, the equipment is convenient to carry, and the consumption of high-pressure gas can be reduced after the small air pump is replaced, thereby realizing low-power consumption control.
Furthermore, the invention adopts two electromagnetic valves connected in parallel, thus realizing the backup design of the air path and improving the reliability of the system; meanwhile, the volume is smaller, and low-power consumption control can be realized; and the time length ratio of inflation pressure storage can be further increased, a smaller air pump can be selected, and the system size is further reduced.
Furthermore, the invention adopts two solenoid valves to be connected in series, the volume is smaller, and the low-power consumption control can be realized; and the time length ratio of inflation pressure storage can be further increased, a smaller air pump can be selected, and the system size is further reduced.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (12)
1. A pneumatic drive system for a push-type dual heart assist device, the push-type dual heart assist device including at least one working balloon, the pneumatic drive system comprising: the device comprises an air pump, an accumulator, an electromagnetic valve and a control unit; wherein,,
the air pump pumps working gas into the accumulator, and the control unit controls the switch of the air pump;
the control unit receives and recognizes an electrocardiogram signal of a patient, and opens the electromagnetic valve in the ventricular systole, and the working gas in the accumulator is filled into the working balloon to realize the compression of the ventricle; in ventricular diastole, the control unit closes the electromagnetic valve to stop the inflation of the working balloon, and the working balloon discharges the working gas inside the working balloon through the electromagnetic valve;
during the venting phase of the working balloon, the air pump pumps working gas back into the accumulator.
2. The pneumatic drive system of claim 1, wherein the pneumatic drive system comprises at least one of the air pump, at least two of the accumulators, and at least two of the solenoid valves, the solenoid valves being in one-to-one correspondence with the accumulators, and the solenoid valves being connected in parallel.
3. The pneumatic drive system of claim 2, wherein at least two of the accumulator wheels are inflated to the working balloon to ensure that at least one of the accumulators inflates the working balloon during the ventricular systole.
4. The pneumatic drive system of claim 1, wherein the pneumatic drive system comprises two of the air pumps and two of the accumulators.
5. The pneumatic drive system of claim 4, wherein the pneumatic drive system comprises two solenoid valves connected in series, one solenoid valve connected to each of the two accumulators to selectively inflate the working balloon, and the other solenoid valve connected to the working balloon to control inflation and deflation of the working balloon.
6. The pneumatic drive system of claim 4, wherein N ventricular systoles are consecutive, wherein one accumulator inflates the working balloon, followed by M ventricular systoles, and wherein another accumulator inflates the working balloon, wherein N is greater than or equal to 1, M is greater than or equal to 1, and M is equal to N.
7. The pneumatic drive system of claim 4, wherein N ventricular systoles are consecutive, wherein one accumulator inflates the working balloon, followed by M ventricular systoles, and wherein another accumulator inflates the working balloon, wherein N is greater than or equal to 1, M is greater than or equal to 1, and M is not equal to N.
8. The pneumatic drive system of claim 1, wherein the air pump comprises a miniature dc motor driven plunger or turbine air pump; the electromagnetic valve comprises a two-position three-way electromagnetic valve or a three-position three-way electromagnetic valve.
9. The pneumatic drive system of claim 1, wherein the accumulator comprises a metal, a polymeric material, or a composite material; the shape of the accumulator comprises a cylinder, a sphere or a spherical cap.
10. The pneumatic drive system of claim 9, wherein the accumulator material comprises a composite material having carbon fiber or glass fiber reinforcement.
11. The pneumatic drive system of claim 1, wherein the air pump and the solenoid valve are replaceable components.
12. The pneumatic drive system of claim 1, further comprising a power supply that supplies power to the air pump and the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210126985.7A CN116617556A (en) | 2022-02-11 | 2022-02-11 | Pneumatic driving system for push type double-core auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210126985.7A CN116617556A (en) | 2022-02-11 | 2022-02-11 | Pneumatic driving system for push type double-core auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116617556A true CN116617556A (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210126985.7A Pending CN116617556A (en) | 2022-02-11 | 2022-02-11 | Pneumatic driving system for push type double-core auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116617556A (en) |
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2022
- 2022-02-11 CN CN202210126985.7A patent/CN116617556A/en active Pending
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Country or region after: China Address after: Floor 1, 2, 3, and 4, Building 20, No. 1188 Lianhang Road, Minhang District, Shanghai, 2011 Applicant after: Shanghai xinhengrui Medical Technology Co.,Ltd. Address before: 200120 8 Chuansha Road, Pudong New Area, Shanghai, 1098 Applicant before: Shanghai xinhengrui Medical Technology Co.,Ltd. Country or region before: China |
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