JPH0461661B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an artificial heart drive device.

[Prior art] An artificial heart is driven by applying positive pressure of several hundred mmHg to pump blood during systole and negative pressure of several tens of mmHg to suck blood during diastole at predetermined beats. This is done by applying alternating pulses based on the motion. Conventionally, this air pressure pulse has been created by a method as shown in FIG. 5 or 6.

The artificial heart drive device shown in FIG. Negative pressure tank 4 is connected to the negative pressure tank connection port of 2.
is connected, and a positive pressure application state where the main connection port of the solenoid valve 2 and the positive pressure tank connection port communicate with each other, and a negative pressure application state where the main connection port and the negative pressure tank connection port communicate with each other are set at predetermined intervals. The electromagnetic valve 2 is controlled to switch alternately based on the motion. Furthermore, the artificial heart drive device shown in FIG. 5 supplies the discharge pressure of the compression pump 5 regulated by the pressure regulating valve 6 to the positive pressure tank 3, and adjusts the internal pressure of the positive pressure tank 3 to a predetermined set pressure. I'm trying to set it to . In addition, while applying the suction pressure of the vacuum pump 7 to the negative pressure tank 4,
The pressure regulating valve 8 provided in the negative pressure tank 4 is used to set the internal pressure of the negative pressure tank 4 to a predetermined set pressure.

On the other hand, the artificial heart drive device shown in FIG. 6 also connects the conduit communicating with the artificial heart 11 to the main connection port of the solenoid valve 12, and connects the positive pressure tank 13 to the positive pressure tank connection port of the solenoid valve 12. The negative pressure tank 14 is connected to the negative pressure tank connection port of the solenoid valve 12, and the main connection port of the solenoid valve 12 and the positive pressure tank connection port communicate with each other in a positive pressure application state, and the main connection port and the negative pressure tank connection port communicate with each other. The electromagnetic valve 12 is switched and controlled so that the negative pressure application state in which the valves are communicated is alternately switched based on a predetermined pulsation. Furthermore, the artificial heart drive device shown in FIG. Solenoid valve 1 that allows the middle part of the pipe to communicate with the atmosphere
6, as well as a negative pressure tank 14 and a pump 1.
A solenoid valve 17 is provided to allow the intermediate portion of the communication pipe 5 to communicate with the atmosphere. As a result, this artificial heart drive device adjusts the negative and positive pressures by controlling the pump output, and the imbalance between negative and positive pressures is adjusted by opening and closing the solenoid valves 16 and 17. .

[Problems to be Solved by the Invention] However, the artificial heart drive device shown in FIG. (b) The pressure regulating valve 8 must be large and highly accurate, and it must be small. It may become impossible to adjust due to intrusion of dust, etc., or it may be difficult to adjust the pressure at a level close to atmospheric pressure, making it impossible to stably obtain the desired pressure regulation state, and driving the artificial heart with high precision. [When two pumps are used and the pressure in the negative pressure tank is close to atmospheric pressure, a large amount of air flows through the valve, so the adjustment (pressure) valve has a large opening and It must be accurate and is expensive. ] There are problems.

In addition, the artificial heart drive device shown in Figure 6 above has the following points: (a) It is controlled by a pump, but the pump affects both negative and positive pressure, making it difficult to control and preventing large leaks. (One of the problems when connecting the heart) is that the pump cannot be operated at full power (the negative pressure in the negative pressure tank is too high) and the response is delayed, and that negative pressure close to 0 mmHg cannot be controlled. (b) It is difficult to adjust the pressure at a level close to atmospheric pressure, making it impossible to stably obtain the desired pressure regulation state, causing difficulty in driving the artificial heart with high precision, etc. [Pump 15 only] To control with
If there is a leak in the pump, the solenoid valve 16,1
Make up for it with 7. The solenoid valves 16 and 17 are not moved (fixed). If set to tank 13, tank 14
becomes excessive and difficult to control (and vice versa).
I can't run it at full power. Tanks 13 and 14 are directly connected to pump 15 and there is no control width. Algorithms (simple arithmetic control) are difficult. ] There are problems.

[Object of the Invention] An object of the present invention is to provide an artificial heart drive device that is small in size, has a long life, and has good pressure regulation performance.

[Means for solving the problem] The present invention connects a conduit communicating with an artificial heart to a main connection port of a main switching valve, connects a positive pressure tank to a positive pressure tank connection port of the main switching valve, A negative pressure tank is connected to the negative pressure tank connection port of the main switching valve, and the main connection port of the main switching valve and the positive pressure tank connection port communicate with each other. In an artificial heart drive device that switches and controls the main switching valve so that the communicating negative pressure application state is switched alternately within a predetermined pulsation range, a positive pressure tank and a negative pressure tank each have a pressure inside the tank. A pressure sensor for detecting pressure is provided, a positive pressure tank and a negative pressure tank are each connected to the discharge port and suction port of one pump, and a first sub-switching valve is installed between the pump discharge port and the positive pressure tank. A second sub-switching valve is interposed between the suction port of the pump and the vagina tank, and both sub-switching valves are provided with vents communicating with the atmosphere, and when the main switching valve is switched to the positive pressure applying state. , by switching the first sub-switching valve so that the discharge port of the pump and the positive pressure tank communicate with each other in conjunction with the generation of the switching operation information, the discharge pressure of the pump is guided to the positive pressure tank. After controlling the pressurization period based on the pressure information detected by the pressure sensor so that the internal pressure of the positive pressure tank reaches a predetermined pressure, the connection between the positive pressure tank and the pump is controlled by the switching operation of the first sub-switching valve. When the main switching valve closes and switches to the negative pressure applying state, the second sub switching valve is switched so that the suction port of the pump and the negative pressure tank communicate with each other in conjunction with the generation of switching operation information. , the suction pressure of the pump is applied to the negative pressure tank, and the pressure reduction period is controlled based on the pressure information detected by the pressure sensor so that the internal pressure of the negative pressure tank becomes a predetermined pressure. When the connection between the negative pressure tank and the pump is closed, the first sub-switching valve closes the discharge port of the pump to the atmosphere. The second sub-switching valve communicates the suction port of the pump with the atmosphere when the connection between the corresponding negative pressure tank and the pump is closed.

Further, in the present invention, when the main switching valve is switched to the positive pressure applying state, the switching operation itself of the main switching valve is used as the switching operation information, and the first auxiliary switching valve is connected to the discharge port of the pump and the positive pressure tank. When the main switching valve is switched to the negative pressure applying state, the second sub switching valve communicates with the suction port of the pump and the negative pressure tank using the switching operation itself of the main switching valve as the switching operation information. It can be switched as follows.

Further, the present invention provides, when the main switching valve switches to the positive pressure applying state, the detection result of the pressure sensor that detects the internal pressure change of the positive pressure tank corresponding to the switching operation of the main switching valve as the switching operation information, When the first auxiliary switching valve is switched so that the discharge port of the pump and the positive pressure tank communicate with each other, and the main switching valve is switched to the negative pressure applying state, the internal pressure of the negative pressure tank changes in response to the switching operation of the main switching valve. The second auxiliary switching valve is switched so that the suction port of the pump and the negative pressure tank communicate with each other, using the detection result of the pressure sensor that has detected this as switching operation information.

Further, in the present invention, each switching valve is a solenoid valve.

Further, the present invention provides a switching valve between each tank and the corresponding pressure sensor, so that not only the communication state between the pressure sensor and the tank but also the communication state between the pressure sensor and the atmosphere can be established. This is what I did.

[Example] FIG. 1 is a circuit diagram schematically showing an artificial heart drive device 20 according to an embodiment of the present invention, and FIGS. 2A and 2B are circuit diagrams showing a state in which positive pressure is applied to the artificial heart drive device 20. , FIGS. 3A and 3B are circuit diagrams showing a negative pressure application state of the artificial heart drive device 20.

The artificial heart drive device 20 connects a conduit 22 communicating with the artificial heart 21 to a main connection port 23M of a main switching valve (electromagnetic valve) 23, and connects a positive pressure tank 24 to a positive pressure tank connection port 23P of the main switching valve 23. Connect the pipe line 25 that passes through the main switching valve 23 to the negative pressure tank connection port 23N.
A conduit 27 connected to a negative pressure tank 26 is connected to the negative pressure tank 26.

The main switching valve 23 is connected to the main connection port 23M of the main switching valve 23 and the positive pressure tank connection port 23 by the controller 28.
The positive pressure application state of FIG. 2 A and B in which P is in communication with
A predetermined pulsation rate (for example, 70 to 80 beats/min) (1
The switching is controlled to alternate within a range of heart rate (for example, 800 msec). 29 is a pulse setting device for the controller 28. The timing of the switching control by the controller 28 may be a predetermined pulsation cycle, or may be synchronized with an electrocardiogram (heartbeat). The range is 1-300 times per minute.

The period for setting the positive pressure application state of the main switching valve 23 corresponds to the systolic period (for example, 200 to 300 msec of one heartbeat) of the artificial heart 21, and the period for setting the negative pressure application state corresponds to the diastole period (1 This corresponds to, for example, 600 to 500 msec) of heartbeats. The controller 28 can adjust the relative ratio of the positive pressure application state setting period and the negative pressure application state setting period given to the main switching valve 23 depending on the patient to whom the artificial heart 21 is applied. 3
0 is a ratio setting device for the positive pressure application state setting period/negative pressure application state setting period for the controller 28.

The artificial heart drive device 20 includes pressure sensors 31 and 32 in the positive pressure tank 24 and the negative pressure tank 26, respectively.
has been established. Positive pressure tank 24 and pressure sensor 31
A switching valve 33 may be interposed between the negative pressure tank 26 and the pressure sensor 32, and a switching valve 34 may be interposed between the negative pressure tank 26 and the pressure sensor 32. The switching valves 33 and 34 are connected to each pressure sensor 31,
By establishing a communication state between each pressure sensor 31, 32 and the atmosphere in addition to a communication state between the pressure sensor 32 and each tank 24, 26, the pressure sensors 31, 32 can be calibrated in a state of communication with the atmosphere.

The artificial heart drive device 20 connects each of the positive pressure tank 24 and the negative pressure tank 26 to each of the suction port 35N of the discharge port 35P of one pump 35,
A first sub-switching valve (electromagnetic valve) 36 is interposed between the discharge port 35P of the pump 35 and the positive pressure tank 24, and a second sub-switching valve (electromagnetic valve) 36 is interposed between the suction port 35N of the pump 35 and the negative pressure tank 26.
A sub-switching valve 37 (electromagnetic valve) is interposed, and both sub-switching valves 3
6, 37 are vents 36A, 37A that communicate with the atmosphere.
has been established. 36P and 36Z are the positive pressure tank connection part and pump connection part of the first sub-switching valve 36, respectively, and 37N and 37Z are the second sub-switching valve 3, respectively.
7 negative pressure tank connection and pump connection.

The controller 28 controls the first sub-switching valve 36 and the second sub-switching valve 37 as follows in response to the switching operation of the main switching valve 23 between the positive pressure applying state and the negative pressure applying state. Control switching.

When the main switching valve 23 is switched to the positive pressure applying state, the controller 28 changes the discharge pressure of the pump 35 to the positive pressure tank 24 by switching the first auxiliary switching valve 36, as shown in FIG. 2A. lead to. By this,
After controlling the pressurization period based on the pressure information detected by the pressure sensor 31 so that the internal pressure of the positive pressure tank 24 becomes a predetermined pressure (Pt0), as shown in FIG. A new switching operation closes the connection between the positive pressure tank 24 and the pump 35. FIG. 4 is a diagram showing changes in the internal pressure PtP of the positive pressure tank 24 with respect to time T, and A to D
is the positive pressure application state setting period, and the artificial heart 21
corresponds to the systolic phase of C indicates the point in time when the internal pressure of the positive pressure tank 24 reaches a predetermined pressure within the positive pressure application state setting period. However, as long as the internal pressure of the positive pressure tank 24 is within the range of one heartbeat, the predetermined pressure may be reached after the positive pressure application state setting period (in the range of D to B). 1
The auxiliary switching valve 36 continues to guide the discharge pressure of the pump 35 to the positive pressure tank 24 until that point.

When the main switching valve 23 is switched to the negative pressure applying state, the controller 28 transfers the suction pressure of the pump 35 to the negative pressure tank 26 by switching the second sub switching valve 37, as shown in FIG. 3A. act. As a result, after controlling the depressurization period based on the pressure information detected by the pressure sensor 32 so that the internal pressure of the negative pressure tank 26 becomes a predetermined pressure (Nt0), the second secondary A new switching operation of the switching valve 37 closes the connection between the negative pressure tank 26 and the pump 35. Figure 4 shows the internal pressure of the negative pressure tank 26.
It is a diagram showing changes in NtP with respect to time T, and D to B are negative pressure application state setting periods, which correspond to the diastolic phase of the artificial heart 21. E indicates the point in time when the internal pressure of the negative pressure tank 26 reaches a predetermined pressure within the negative pressure application state setting period. However, if the internal pressure of the negative pressure tank 26 is outside the range of one heartbeat,
The predetermined pressure may be reached after the negative pressure application state setting period (in the range of A to D), and in this case, the second sub-switching valve 37 changes the suction pressure of the pump 35 to the negative pressure until that point. It continues to act on the tank 26.

The controller 28 controls the discharge port 35P of the pump 35 when the first sub-switching valve 36 closes the connection between the positive pressure tank 24 and the pump 35, as shown in FIG. 2B and FIGS. 3A and B. so that it communicates with the atmosphere,
Switching control of the first sub-switching valve 36 is performed. As a result, the pump 35 always operates in a stable state without experiencing any discharge resistance.

The controller 28 controls the suction pressure of the pump 35 when the second sub-switching valve 37 closes the connection between the negative pressure tank 26 and the pump 35 as shown in FIGS. 2A, B and 3B. The second sub-switching valve 37 is controlled to communicate with the atmosphere. As a result, the pump 35 always operates in a stable state where it is not subjected to suction resistance.

In addition, when the main switching valve 23 is switched to the positive pressure application state or the negative pressure application state in the above, the switching operation of each of the sub switching valves 36 and 37 in response to the main switching valve 23 is the same as that of the main switching valve 23. It may be electrically linked to the switching operation, or each tank 2 may correspond to the switching operation of the main switching valve 23.
Each pressure sensor 3 that detected the internal pressure change of 4 and 26
The switching operation may be performed based on the detection results of 1 and 32.

Further, in the above, the sub switching valves 36, 3
The pressurization period control of the tank internal pressure may be controlled by the pressure detected by the pressure sensor, or by measuring the time required for pressurization or depressurization to reach a predetermined pressure. May be controlled. In this case, to prevent deviations due to accumulation,
After each control, the difference between the predetermined pressure and the actual pressure is measured, and the pressurization or depressurization period is adjusted in the next operation.

[Operation of the embodiment] The artificial heart 21 controls the positive pressure tank 24 during the systole based on a predetermined pulsation by the switching operation of the main switching valve 23 which is controlled by the controller 28. Blood is pumped out by applying internal positive pressure,
During the diastole, negative pressure inside the negative pressure tank 26 is applied to suck blood.

Therefore, during the systole of the artificial heart 21, the controller 28
In response to the switching of the main switching valve 23 to the positive pressure applying state, the first auxiliary switching valve 36 is switched, and the internal pressure of the positive pressure tank 24 is immediately adjusted to the predetermined set pressure before the elapse of one heartbeat. Pump 3 to be restored to
5 discharge pressure is led to the positive pressure tank 24. After the internal pressure of the positive pressure tank 24 reaches a predetermined pressure, a new switching operation of the first sub-switching valve 36 causes the positive pressure tank 24 to
The connection between the pump 35 and the positive pressure tank 2 is closed.
4 is maintained at the predetermined pressure.

Also, during the diastole of the artificial heart 21, the controller 28
In response to the switching of the main switching valve 23 to the negative pressure applying state, the second sub switching valve 37 is switched, and the internal pressure of the negative pressure tank 26 is immediately adjusted to the predetermined set pressure before one heartbeat has passed. Pump 3 to be restored to
A suction pressure of 5 is applied to the negative pressure tank 26. After the internal pressure of the negative pressure tank 26 reaches a predetermined pressure, the second
A new switching operation of the sub-switching valve 37 closes the connection between the negative pressure tank 26 and the pump 35, and maintains the internal pressure of the negative pressure tank 26 at the predetermined pressure.

According to the above embodiment, by using only one pump 35, the positive pressure tank 24 and the negative pressure tank 26
It is possible to ensure the internal pressure of each of the artificial heart drives at a predetermined pressure, the overall size and weight of the artificial heart drive device 20 can be reduced, and the artificial heart drive device 20 can be carried and transported by the patient. Become.

In addition, in order to adjust the internal pressure of the positive pressure tank 24, a first sub-switching valve 36 interposed between the positive pressure tank 24 and the pump 35 is used, and once the internal pressure of the positive pressure tank 24 reaches a predetermined pressure, the positive Pressure tank 24 to pump 3
5, the first auxiliary switching valve 36 does not have to switch frequently for pressure adjustment, and its lifespan is extended. In addition, in order to adjust the internal pressure of the negative pressure tank 26, a second sub-switching valve 37 interposed between the negative pressure tank 26 and the pump 35 is used, and once the internal pressure of the negative pressure tank 26 reaches a predetermined pressure, the negative pressure Since the tank 26 is closed to the pump 35, the second sub-switching valve 37
However, the service life is extended without frequent switching operations for pressure adjustment.

In addition, since the pump 35 is driven with its discharge port and suction port not closed and in communication with either the tank or the atmosphere, the discharge resistance,
It is driven with little suction resistance and can ensure stable discharge pressure and suction pressure.

In addition, after the internal pressure of the positive pressure tank 24 and negative pressure tank 26 reaches the predetermined set pressure, each sub-switching valve 3
6, 37 to pump each tank 24, 26
5. Since it is closed to the atmosphere, each tank 24, 2
The internal pressure of No. 6 is easily stabilized, and the pressure can be easily adjusted to a level close to atmospheric pressure. Therefore, each tank 24, 26 can stably obtain a desired pressure regulation state, and the artificial heart 21 can be driven with high precision.

In addition, in the artificial heart drive device 20, since the positive pressure tank 24 and the negative pressure tank 26 are connected via the artificial heart 21, the positive pressure remaining in the artificial heart 21 is sucked into the negative pressure tank 26, and the negative pressure tank 26 is connected to the negative pressure tank 26. pressure tank 26
It is also possible to set the pressure to a small positive pressure of, for example, +5 mmHg. That is, a pressure state of + to - can be easily created in the negative pressure tank 26.

Furthermore, in the artificial heart drive device 20, the internal pressure of the positive pressure tank 24 is made negative, and the negative pressure tank 2
In order to speed up the response when adding pressure within 6, each tank 24 and 26 may be provided with a pressure regulating valve for pressure relief, or the positive pressure tank 24 and negative pressure tank 26 may be They may communicate through a communication path, and an on-off valve (shunt valve) may be provided in the middle of the communication path.

Note that the sub-switching valves 36 and 37 are not solenoid valves, but may be motor-driven ball valves, needle valves, or the like. .

Further, in implementing the present invention, the main switching valve 23
The switching may be performed by a single valve 101 as shown in FIG. 7A, or by a complex of multiple valves 102 and 103 as shown in FIG. 7B. It may also be a device that performs switching.
According to FIG. 7B, there are the following advantages compared to FIG. 7A. In other words, valve B operates fewer times than valve A (1/2 in the figure), so it is less likely to break down and has a longer service life. If the valve is a solenoid valve, the opening and closing of the valve will be delayed from the signal, so in case A, there is no way to compensate for the delay, but in case B, the valve is independent, so it is necessary to anticipate the delay and send the signal early. I can do it. B
In this case, if one is open, the other can be closed, or both can be closed and left in a stationary state. Therefore, when using the main switching valve 23 shown in FIG. The stationary state γ is closed without communicating with the tank of
It becomes possible to control switching alternately.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide an artificial heart drive device that is small, has a long life, and has good pressure regulation performance.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram schematically showing an artificial heart drive device according to an embodiment of the present invention, FIGS. 2A and B are circuit diagrams showing a positive pressure application state of the artificial heart drive device, and FIG.
Figures A and B are circuit diagrams showing the negative pressure application state of the artificial heart drive device, Figure 4 is a diagram showing the pressure states of the positive pressure tank and negative pressure tank over time, and Figure 5 is the conventional artificial heart drive. FIG. 6 is a circuit diagram schematically showing the device, FIG. 6 is a circuit diagram schematically showing another conventional artificial heart drive device, and FIGS. 7A and 7B are schematic diagrams showing the internal structure of the main switching valve. 20...Artificial heart drive device, 21...Artificial heart, 22...Pipe line, 23...Main switching valve, 23M...
...Main connection port, 23P...Positive pressure tank connection port, 24
...Positive pressure tank, 23N...Negative pressure tank connection port,
26... Negative pressure tank, 31, 32... Pressure sensor, 33, 34... Switching valve, 35... Pump, 3
5P...Discharge port, 35N...Suction port, 36...First sub-switching valve, 37...Second sub-switching valve, 36A, 3
7A...Vent, 36P...Positive pressure tank connection,
37N...Negative pressure tank connection.

Claims (1)

[Scope of Claims] 1. A pipe line communicating with the artificial heart is connected to the main connection port of the main switching valve, a positive pressure tank is connected to the positive pressure tank connection port of the main switching valve, and a negative pressure tank of the main switching valve is connected to the main connection port of the main switching valve. A negative pressure tank is connected to the connection port, and the main connection port of the main switching valve and the positive pressure tank connection port communicate with each other in a positive pressure application state, and the main connection port and the negative pressure tank connection port communicate with each other in a negative pressure application state. In an artificial heart drive device that switches and controls the main switching valve so as to switch alternately within a predetermined pulsation range, a pressure sensor is installed in each of the positive pressure tank and the negative pressure tank to detect the pressure inside the tank. A positive pressure tank and a negative pressure tank are each connected to the discharge port and suction port of one pump, and a first sub-switching valve is interposed between the pump discharge port and the positive pressure tank, and the pump suction port is connected to the positive pressure tank and the negative pressure tank, respectively. A second valve is placed between the mouth and the negative pressure tank.
A sub-switching valve is interposed, and both sub-switching valves are provided with vents that communicate with the atmosphere, and when the main switching valve switches to the positive pressure applying state, the pump discharge port and Connect the first tank so that the positive pressure tank is in communication.
By switching the sub-switching valve, the discharge pressure of the pump is guided to the positive pressure tank, and the pressurization period is set based on the pressure information detected by the pressure sensor so that the internal pressure of the positive pressure tank becomes a predetermined pressure. After the control, the connection between the positive pressure tank and the pump is closed by the switching operation of the first sub-switching valve, and when the main switching valve switches to the negative pressure applying state, the switching operation is linked to the generation of the switching operation information. A second valve is installed so that the pump suction port and negative pressure tank communicate with each other.
By switching the sub-switching valve, the suction pressure of the pump is applied to the negative pressure tank, and the pressure reduction period is controlled based on the pressure information detected by the pressure sensor so that the internal pressure of the negative pressure tank becomes a predetermined pressure. After controlling, the second
The switching operation of the auxiliary switching valve closes the connection between the negative pressure tank and the pump, and the first auxiliary switching valve closes the connection between the corresponding positive pressure tank and the pump, and the first auxiliary switching valve closes the connection between the pump and the positive pressure tank. communicating the outlet with the atmosphere;
An artificial heart drive device characterized in that the second sub-switching valve connects the suction port of the pump to the atmosphere when the connection between the corresponding negative pressure tank and the pump is closed. 2. When the main switching valve is switched to the positive pressure applying state, using the switching operation itself of the main switching valve as the switching operation information, switching the first auxiliary switching valve so that the discharge port of the pump and the positive pressure tank communicate, A patent claim for switching the second sub-switching valve so that the suction port of the pump and the negative-pressure tank communicate with each other, using the switching operation itself of the main switching valve as the switching operation information when the main switching valve switches to the negative pressure applying state. The artificial heart drive device according to item 1. 3 When the main switching valve switches to the positive pressure application state, the first sub switching valve is switched so that the discharge port of the pump and the positive pressure tank communicate with each other, and when the main switching valve is switched to the negative pressure applying state, a pressure sensor detects a change in the internal pressure of the negative pressure tank corresponding to the switching operation of the main switching valve. The detection result is used as the switching operation information.
The artificial heart drive device according to claim 1, wherein the second auxiliary switching valve is switched so that the suction port of the pump and the negative pressure tank communicate with each other. 4. The artificial heart drive device according to any one of claims 1 to 3, wherein each of the switching valves is a solenoid valve. 5 A switching valve is interposed between each tank and the corresponding pressure sensor, so that in addition to the communication state between the pressure sensor and the tank, it is also possible to establish a communication state between the pressure sensor and the atmosphere. - The artificial heart drive device according to any one of Items 4 to 4.