JPS58169462A - Artificial heart drive apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an artificial heart drive device, and more particularly to an artificial heart drive device that drives the artificial heart by alternately applying positive pressure to the artificial heart using a fluid such as air.

From the viewpoint of safety, it is important for an artificial heart to be driven so as to provide blood with a pulsating flow that closely resembles the pulsation of a living heart. Various types of artificial hearts are known, such as a diaphragm type, a sack type, and a piston type, and these are generally driven by receiving a predetermined pressure from a fluid such as air. In order to drive an artificial heart under the best conditions depending on the condition of the living body, a drive device that outputs accurate pressure according to the conditions at a predetermined timing is required. That is, heart rate, positive pressure, pressure protection, positive pressure, and the duration of applying positive pressure to the artificial heart (I)
A drive device that can accurately and quickly set all the parameters such as curvature, duty ratio, etc. to predetermined values is desirable. Conventionally, in artificial heart drive devices, mechanical pressure reducing valves and the like have been used in positive pressure systems and positive pressure systems, respectively, as means for obtaining accurate pressure. In the artificial heart drive device, the output end of the positive pressure system and the output end of the negative 3-pressure system are connected to each other in order to alternately apply positive pressure and positive pressure to the artificial heart. In order to switch the pressure, electromagnetic valves for opening/closing control are provided at the output end of the positive pressure system and the output end of the positive pressure system, respectively. These electromagnetic valves are controlled by a control device to alternately open and close at predetermined timings according to a set heart rate. By the way, this type of artificial heart drive device has to be equipped with many devices such as a compressor, a vacuum pump, a tank (accumulator), a solenoid valve, and a control device, so the device becomes quite large. Artificial hearts are used, for example, to assist a living body's heart during surgery, but because there are many doctors and surgical instruments around the operating table during surgery, a large artificial heart drive is required during surgery. The device cannot be placed near the operating table.

However, it is necessary to be able to change the heart rate of the artificial heart at any time depending on the patient's physical condition. For this reason, conventionally, the artificial heart drive device has been placed at a location away from the operating table, and the operation of the artificial heart drive device has been performed by a dedicated operating technician under the direction of a doctor. However, in order to drive the artificial heart under optimal conditions, it is desirable for the physician to directly operate the artificial heart drive device. Conventional artificial heart drive devices use mechanical pressure reducing valves, etc., and are difficult to operate, and remote control is not possible.

One object of the present invention is to provide an artificial heart drive device that allows a doctor to directly change the parameters of the artificial heart drive device, and another object of the present invention is to provide an artificial heart drive device that is easy to operate. It is.

In order to achieve the above object, the present invention provides a solenoid valve as a means for obtaining a predetermined pressure, and controls the opening and closing of the solenoid valve so that the output signal of the pressure detection means becomes a predetermined set value. Control as follows.

This makes it possible to electrically change all the parameters of the artificial heart drive, so a remote control device is installed that instructs the control device to change the set values, making it possible to remotely control the parameters of the artificial heart drive. .

According to this, the remote control device can be connected to the control device of the artificial heart drive device using an electric cable or the like and placed at the desired position, and the doctor can directly operate the remote control device to change the parameters of the artificial heart S drive. It becomes possible to do so.

In one preferred embodiment of the present invention, the remote control device has a switch means provided inside a case whose operation surface is covered with a flexible material. According to this, since the switch means is not exposed, it is possible to prevent blood, chemicals, etc. from entering the inside of the remote control device and cause poor contact, etc., and it is also possible to use the remote control device repeatedly by cleaning. Further, when the switch means is operated, a predetermined sound is emitted to notify that the switch is being operated. According to this, it is possible to prevent the switch from being operated by mistake. Furthermore, as a solenoid valve for pressure adjustment, the fixed magnetic core and the movable magnetic core are rearranged around the axis of the electric coil, and the movable magnetic core is movable in the direction along the axis relative to the fixed magnetic core. A solenoid control valve is used.

This type of solenoid valve has good responsiveness, so it is possible to perform highly accurate pressure control. □ Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of one type of artificial heart drive device implementing the present invention. This will be explained with reference to FIG. 1 is the main body of the artificial heart drive device, la is an operation panel, 1b is a display panel, and 1c is a connection panel. The inside of the display panel 1b shows the positive pressure, positive pressure, and duty ratio of positive pressure and positive pressure for the right heart, the positive pressure, positive pressure, and duty ratio of positive pressure and positive pressure for the left heart, heart rate, and Pressure on the right and left side (yin/
positive) is displayed. The connection panel 1c includes a remote operation unit (remote operation means) REM that can be attached and detached with a connector.
The cable is connected to tubes 2a and 2b that apply pressure to the right and left artificial hearts. The artificial heart drive device main body 1 is movably supported by four casters 3.

FIG. 2a is a front view showing the remote operation unit REM;
FIG. 2b is an enlarged sectional view taken along the line y-n of FIG. 2a. Second
This will be explained with reference to Figure a and Figure 2b. The remote control unit l-REM is capable of remotely controlling all parameters of the main body of the artificial heart drive device, and has 14 operating units 5l-8]4. The operation parts 81 to S4 are respectively the left positive pressure 7-increase, positive pressure decrease, positive pressure increase and positive pressure decrease, and the operation part 85.
~S8 are positive pressure increase, positive pressure decrease, positive pressure increase and positive pressure decrease on the right side, and operation section S9. SlO raises and lowers the positive pressure or positive pressure duration (or positive pressure and positive pressure duty) on the left side, and operation parts Sll and S12 raise, lower, and operate the positive pressure or positive pressure duration on the right side. Sections S13 and S14 are sections for increasing and decreasing the heart rate, respectively. PL is the power on of the artificial heart drive device and the RE
V is a light emitting diode that indicates that it is connected to the main body, and SP is a speaker that outputs a sound to notify when a switch is pressed. The casing 4 of the remote operation board REM is made of synthetic resin.

Inside the casing 4, there are key switches with relatively short strokes (SW9.
1) is attached to the printed circuit board 5. A hole is made in the casing 4 at the position of each operation part, and a flexible film 6 is pasted to cover the surface of the hole to make internal switches and the like waterproof. Holes 78- and 8 are provided for hooking the remote operation board REM in a predetermined position.

Fig. 3 is a perspective view of the caster 3, Fig. 4a, Fig. 4b,
4C and 4d are respectively a front view, a left side view, a right side view, and a vertical sectional view of the casing 31 constituting the caster 3, and FIG. 6a and 6b are a front view and a left side view of the stand 33 that supports the caster 3,
FIG. 7 is a partially cutaway front view showing the connection between the artificial heart drive device body 1 and the casters 3. FIG. Figures 3 and 4a.

Figures 4b, 4c, 4d, 5 and 6a.

This will be explained with reference to FIGS. 6b and 7. The casing 31 is provided with three holes 31a, 31b and 31c. One hole 31a is for connecting the caster body 3a and the casing 31, and the other hole 31'
b is for inserting the protrusion 34 of the stand 33;
Another hole 31c is for inserting a bolt 32. As shown in FIG. 5, the bolt 32 has a tapered head to make it easier to grip and less likely to slip, and the thread is formed only in a portion near the head. The stand 33 is composed of a plate-shaped portion and a protrusion 34. The protrusion 34 is provided with a slot 34a that communicates with the hole of the casing 31. 33a is a hole for a bolt for fixing the stand 33 to the main body 1 of the artificial heart drive device. Normally, the artificial heart drive device main body 1 and the casters 3 are the seventh
As shown in the figure, they are connected to form a single body. That is, the protrusion 34 of the stand 33 fixed to the artificial heart drive device body 1 is inserted into the hole 31b of the caster 3, the holes 31c and 34a are aligned, and the bolt 32 is inserted into the hole to secure it. 35 is sterilized sealing vinyl, 36
is Patsukin.

The purpose of making the casters removable as in step 2 is to allow dirty casters to be replaced with sterilized casters. When transporting the artificial heart drive device into a clean room, operating room, etc., the casters of the artificial heart drive device in the state shown in FIG. 7 are replaced at the entrance of the clean room, etc. as follows. First, the bolt 32 is twisted and removed, and since the engagement between the hole 31b and the protrusion 34 is relatively tight, the caster 3 is rotated relative to the protrusion 34 and removed. After removing the packing 36 and the sealing vinyl 35, a sterilized caster is inserted into the protrusion 34 and a sterilized bolt is attached.

Figures 8a, 8b, 8c, 8d and 8e
This will be explained with reference to the figures. Figures 8a, 8b, and 8c.

Figures 8d and 8e are a perspective view, a cross-sectional view (a cross section taken along the line ■b-■b in Figure 8c), and an 8b
They are a sectional view taken along the line ■C--■C in the figure, a partially enlarged sectional view showing the connection between the terminal and the tank, and a partially enlarged sectional view showing the connection between the pressure sensor 41 and the tank.

This tank unit 40 has four tanks (accumulators), and one tank unit constitutes a positive pressure system for a pair of (left and right) artificial hearts and a part of the positive pressure system. Each of the four tanks is provided with two solenoid valves 4.2.43 and a pressure=11-sensor 41. The solenoid valve 43 is of a general open/close control type, and the solenoid valve 42 is a solenoid controlled valve whose opening degree is controlled according to the energization level, as will be described later. The solenoid valve 42 of each block (tank) is
1-42a or output port 42b to panel 44a, 44
They are inserted into holes 45a, 45b, 45c, or 45d of holes 45a, 44c, or 44d and are fixed, and the other ports (output ports or input ports) are open to the space within each block. The solenoid valve 43 of each block opens one boat 43a to the space within each block, and the other boat 43b to the hole 46a of the panel 46.

46b or into the holes 47a and 47b of the panel 47 and are fixed. Each panel 44a, 44b.

44c and 44d have their holes 45a and 45b.

A tube 48a communicates with 45c and 45d.

48b, 48c, and 48d are connected. tube 4
Tubes 8a and 48d are each connected to a vacuum pump, which is a source of pressure protection, and tubes 48b and 48C are each connected to a compressor, which is a positive pressure source. Holes 46a and 46b in panel 46 communicate with each other, and a tube 49 is connected to the flow path. Further, holes 47a and 47b in panel 47 communicate with each other, and a tube 50 is connected to the flow path. Tubes 49 and 50 are connected to the left and right artificial heart, respectively. Panels 44a, 44b, 44c and 44d
Four terminals 51 and a pressure sensor 41 are fixed to each. Terminal 51 and pressure sensor 41 are mounted as shown in Figures 8d and 8e. terminal 5
1 is a rod-shaped conductor 51a and an insulating nipple 5 that holds it.
1b. The insulating nipple 51b is made of Teflon. The panel 44 has a tapered hole formed with a thread, and the insulating nipple 51b has a corresponding shape. Conductor 51a and insulating nipple 51b
It is also fixed with a tapered screw. Since these tapered screws perform the sealing function, no special sealing member is required. Lead wires 54 from the solenoids of the solenoid valves 42 and 43 are connected to the connectors 52 and 53 of each terminal 51.
connected via. The pressure sensor 41 is fixed to the panel 44 with a tapered screw similar to the terminal 51.

This will be explained with reference to FIGS. 9a, 9b, 9c and 9d. Figures 9a, 9b, 9c and 9
Figure d is a plan view and a right side view of a solenoid valve (electromagnetic control valve) 42 used in this embodiment, respectively.

They are a left side view and an enlarged longitudinal sectional view. The first boat 12 and the second port 1 are connected to the valve housing 11 of the electromagnetic control valve 42.
3 is formed. The inner space of the housing 11 is the valve seat 1
4, it is divided into a first interior chamber 15 communicating with the first port 12 and a second interior chamber 16 communicating with the second boat 13. A magnetic coil case 18 is fixed to the valve housing 11 with a sealing material 17 interposed therebetween. A coil bobbin 20 on which a coil 19 is wound is inserted into the case 18, and is supported by magnetic bases 21 and 22. A fixed magnetic core 23 is fixed to the base 21 . The core 23 is hollow, and a non-magnetic guide rod 24 passes through it. The rod 24 has a movable magnetic core 2
5 is fixed.

One end of the rod 24 is pushed to the left by a coil spring 26. The other end of the rod 24 passes through a bearing 27 and a bellows 28, and a valve body 29 is fixed to the end.

The interior space of the bellows 28 communicates through small holes 30 and 37 with the first interior chamber 15 (as shown) or the second interior chamber 16 (when the rod 24 is driven to the right).

When the coil 19 is energized, a magnetic flux is generated that circulates between the core 23, the core 2'5, the base 22, the case 18, the base 21, and the core 23, and an attractive force acts on the core 25 toward the core 23. The rod 24 moves to the right to a point where the second suction force and the repulsive force of the coil spring 26 are balanced, and the valve body 29 is moved away from the valve seat 14 by a distance corresponding to the suction force. The end surface 23a of the core 23 is in the shape of a mountain, and the end surface 25a of the core 25 is concave to receive the central projection, and the inner surfaces 23b of the projections at both ends of the mountain shape are tapered. Due to the presence of the second taper, the energization level and the amount of movement of the rod 24 (gap between 23a and 25a) 15- are proportional over a wide range. Furthermore, this type of solenoid valve has a movable part that has good responsiveness and can perform opening/closing control at high speed.

FIG. 1O shows an outline of the configuration of the artificial heart drive device shown in FIG. 1 together with the artificial heart. This will be explained with reference to FIG. 6
0R and 60L are artificial hearts, which are connected to an artificial heart drive device through tubes 2a and 2b. tube 2
a and 2b are each connected to the output end of the tank unit 40.

61R and 61L are compressors, and 62R and 62L are vacuum pumps. The solenoids of the four solenoid valves 42 and the pressure sensor 41 are connected to the control device C0N1, and the four solenoid valves 43 are connected to the control device CON,2. Arithmetic devices CPU1 and CPU2 are connected to the control devices C0N1 and CON2, respectively. Operation terminals for instructing changes in positive pressure, pressure protection, heart rate, and duty are connected to the input ports of the arithmetic units CPUI and CPU2. The operating end consists of a main body operating board SWU installed on the operating panel 1a of the artificial heart drive device main body 1 and a remote operating board REM for remote control. The main body operation board SWU and the remote operation board REM are connected in parallel as will be described later. A predetermined signal from the sound generator SGU is supplied to the remote operation board REM. sound generator SG
U is controlled by the arithmetic units CPUI and CPU2.

The display device DSU is composed of a 7-segment light emitting diode display for numerical display, etc., and is connected to the control device C0N1.
It is dynamically driven by the finger drive signal and segment drive signal from CON2.

Figure 11 shows the arithmetic units CPUI and CP shown in Figure 10.
□ shows one configuration of U2. A single board microcomputer unit H62SCO1 manufactured by Hitachi is used as the second microcomputer unit. H62SC
O1 uses a 6802 series microprocessor and is equipped with an I10 board, timer, RAM, ROM, etc. In this example, the RAM is 8M of CMOS type.
6116 is used.

FIG. 12 is a circuit diagram showing the circuit configuration of the remote operation unit REM. SWI to 5W14 are key switches provided corresponding to the operating portions 5l-314 shown in FIG. 2a, SP is a speaker, and PL is a light emitting diode.

FIGS. 13a and 13b are circuit diagrams showing the configuration of circuits included in the control device CON1. Control device C0N
Table 1 shows a list of the stacking ports #f (IC) used in 1.

Table 1 First, explanation will be given with reference to FIG. 13a. Connector J1 is connected to output port P3 of the arithmetic unit CPUI,
In order to perform dynamic display, the display data from the CPUI is divided into two BCDs: display digit data and display numeric data.
The signals are input separately. The display data output by the CPUI includes positive pressure and drop pressure data for each of the left and right units. The integrated circuit Zl decodes the BCD signal of the display digit data and outputs it to the transistors Trl to Tr6 and the inverter z.
Apply to 1=19-4. The transistors Trl-Tr6 are connected to the anode (digit electrode) of the light emitting diode display.

The integrated circuits 72 to z5 are BCDs for display numerical data, respectively.
The signal is converted into a 7-segment signal, and the 7-segment signal is applied to each cathode (segment electrode) of the light emitting diode display through drivers 26 to Z9. The key switch contacts of the main body operation board SWU and the key switch contacts of the remote operation boards R and EM are connected in parallel near the connector J2, and they are connected to the integrated circuits Z12 and z.
13. Accumulation port FllIz12 and Z
13 has a circuit for removing chattering of mechanical contacts, and the signal from which the chattering has been removed is sent to an inverter Zll.
Through the accumulation port li! Apply to IZ10. Accumulation port Fs
The z10 sends binary codes corresponding to key switches pressed in a predetermined priority order to the microcomputer CPUI.
Output to. 5SRI to 5SR4 are solid state relays, which are controlled on/off by the output port of the microcomputer CPUI via the buffer Z15. 20 - The output ends of the lid state relays 5SRI to 5SR4 are connected to each solenoid valve 42 via a connector J4. This will be explained with reference to FIG. 13b. Z16 is Dichiru's 16 channel 12 dot A/D converter HDAS-
It is 16MC. Terminals BIT1 to BIT12 of Z16 are signal output terminals, and BITI to BIT4 and BIT9 to B
The ITs 12 are interconnected. A 12-bit signal is applied to the input port of the microcomputer CPUI in two parts of 8 bits each. BIT1~4 and BIT5
~1217) Switching is done by CPUI Z 16 (7) EN 1
, by controlling each terminal of EN2 and EN3.

Terminals AI, A2. A4 and A8 are for selecting input channels. The HDAS-16 has a 16-channel input port, and in the second embodiment, 8 channels are connected to the connector J5, and signals from each pressure sensor 41 are input to 4 channels.
That is, the right corner pressure signal RPP, the right negative pressure signal RNP, the left positive pressure signal LPP, and the human negative pressure signal LNP are input.

FIG. 14 is a circuit diagram showing the circuit configuration of the control bag [CON2,
FIG. 15 is a block diagram showing the circuit configuration of the sound generator SGU. This will be explained with reference to FIGS. 14 and 15. A list of integrated circuits used in the control bag CON2 and the sound generator VSU is shown in Table 2 below.

The control device CON2 in Table 2 has a configuration similar to the above-mentioned control device CON1, but since the control device CON2 does not detect pressure, it is not provided with an A/D converter. Connectors J6 and J7 are respectively ports P of the arithmetic unit CPU2.
3 and P2. Connector JIO is connected to the solenoid of electromagnetic valve 43. integrated circuit z30
and z31, via connector J8, increases or decreases the heart rate of the main body operation board SWU and remote operation board REM, and increases or decreases the ratio of the period of applying positive pressure to the period of applying positive pressure on the left and right sides. Instruct each key switch contact to be connected. The sound generator SGU has three accumulation ports @Z
It is mainly composed of numbers 36 to 238. These integrated circuits 236-238 each produce a signal at an output terminal OUT with a frequency depending on the state of the six input ports. The connector Jll has a signal r OPEN/CLOSE indicating whether a key has been operated, and a signal rUP/DOWN, + indicating whether the operated key is to raise or lower the CPU.
and are input from the CPU 2, respectively. A high level H is applied to the reset input terminals RES of the integrated circuits 236 to 238 when the key 23-1 is not pressed.
36 to 238 have been reset. Reset input terminal R
When a low level L is applied to ES, a pulse signal of 3.2 KHz or 1.6 Kllz appears at the output terminal of 236, depending on the logic level of the output terminal of OR gate ORI. Z37 is always 2 when the RES end is l.
It outputs a Hz pulse signal and applies that signal to the 238 input port. 238 is 3°2K117.2 from Z36 when the output terminal of Z37 is 1-1. or 1.6K
The pulse signal of llz is output as it is to the output terminal, and Z37
When the output terminal of is L, the pulse signal from 236 is 1
/2 frequency-divided signal is output to the output terminal. Therefore, for example, if you press the left pressure increase operation section S1 on the remote operation board REM, (7) tlP/DO from the CPU
The WN signal becomes H, the open/close signal from CPU1 becomes H, and Z
A pulse signal of 3.2 Hz appears at the output end of 36,
The output terminal of 238 has a frequency of 3.2 KI every 0.5 seconds.
IZ or 1.6 changes to Ilz. A pulse signal appears. Also, when the left pressure lowering operation section S2 is pressed down, Z
A pulse signal of 1.6 KHz appears at the output terminal 24- of 36, and a pulse signal of 1, 6 KHz or 0.6 KHz appears at the output terminal of 238 every 0.5 seconds.
A pulse signal varying to 8KHz appears. The second signal is applied to the speaker of the remote operation board REM.

FIGS. 16a, 16b, and 16c are arithmetic bags [C
This figure shows a general operational flow of the PU1, and is a flowchart of a main program, an interrupt processing program, and a tank press-fitting subroutine, respectively. The operation of the CPUI will be described with reference to FIGS. 10, 13a, 13b, 16a, 16b, and 16c.

First, to explain the outline, the calculation bag [CPU 1 reads the keys of the main body operation board SWU or remote operation board REV manually, reads each tank pressure (pressure sensor 41),
Constant pressure control of each tank pressure (duty control of solenoid valve 42)
, key Changes pressure parameters according to human power 9 Outputs display data and instructs generation of sound.

When the power is turned on, initial values are set for each parameter and interrupts are enabled. In the second embodiment, the initial values are +3 for each of RPP, RNP, LPP and LNP.
0. -30. +100 and -50 [mmHg), and the upper and lower limits of each pressure are 0/++50, respectively.
．． -10010゜0/+300 and -15010[m
mHg]. Interrupts are generated periodically every 4 ms by a timer within the CPU. When an interrupt occurs, the microprocessor executes the interrupt handling routine shown in Figure 16b. In the interrupt processing routine, first the A/D
Select converter Z16 and set the input channel to CHO,
Switch to CH1, CH3 and CH4 in order and set the pressures RPP, RNP, LPP and L N P of each tank in order.
/D conversion and read the converted digital data. Further, it outputs "11" or "0" to a predetermined port of P3 to control the solid state relays 5SRI-8SR4 and turn on or off the four electromagnetic valves 42. This on/off switching is reversed from on to off once every n1 interrupts, and from off to on once every n2 interrupts, depending on the duty parameter set in the memory of CPU1. This is done by letting Therefore, by changing the parameters, the duty ratio of the on time and off time of the solenoid valve 42 changes. By controlling the second duty ratio according to the comparison result between the detected pressure of each tank and the target pressure, the pressure of the tank is maintained at a predetermined pressure. In the tank press-fitting subroutine, the pressure data of each tank read from the A/D converter 216 is averaged, and the data is converted into four-digit decimal data for display. The reason for averaging the pressure data is to remove short-term minute fluctuations in pressure due to opening and closing of valves. If there is a key press, it is determined which key was pressed and the parameter associated with that key is increased (or decreased) little by little. Also, it determines whether the pressed key instructs "Up" or "Down", applies an open/open signal and an UP/DoυN signal to the connector Jll, and outputs a predetermined sound from the speaker of the remote operation board REM. generate. Note that the 21 monic code RTT shown in FIG. 16b indicates a return instruction (return from i27-interrupt), and RTS indicates a return instruction (
ret, urn from 5ubroutine).

FIG. 17 is a flowchart showing the general operation of the arithmetic unit CPU2. The operation will be explained with reference to FIG.

When the power is turned on, the microprocessor first loads each I10
The boat is set to its initial state, and parameters such as the heart rate and the ratio of the time for applying positive and negative pressure to the left and right sides (duty or positive pressure, duration of negative pressure) are set to initial values. In the second embodiment, the initial values of each parameter are the heart rate of 1100 rpm, the duty of the left artificial heart to 45% (duration 270 m5), and the duty of the right artificial heart to 55% (duration 330 m5). It is a rule. In interrupt processing, the logic level of a predetermined output port is updated from rlJ to "0" or from "0" to "1" at a certain timing according to a predetermined parameter (heart rate), and the solid state 1) relay SSR, 5~5
The solenoid valve 43 is opened and closed by controlling SR8. It also outputs display data (digit data and segment data). If the key force is 28-, the key operation is performed while determining which key was pressed and checking whether the value of the parameter associated with that key exceeds the upper or lower limit. Increment or decrement while continuing. Arithmetic processing is performed on various parameters related to that parameter. This processing is performed by jumping to each subroutine.

The subroutine group includes a subroutine that calculates the time of one beat related to heart rate, a subroutine that calculates the duration of the left artificial heart, a subroutine that calculates the duration of the right artificial heart, a subroutine that calculates the duty of the left artificial heart, It consists of a subroutine that calculates the duty of the right artificial heart, a subroutine that performs division, a subroutine that performs multiplication, etc. When this calculation is completed, each updated parameter is recorded in the display memory, and after a predetermined period of time, the process returns to the interrupt wait process. When the next interrupt occurs, the updated data will be displayed.

In the above embodiment, the solenoid valve 42 is always energized to open and close and the duty of the opening time and the closing time is changed to control the pressure, but only when the output signal of the pressure sensor 41 exceeds a predetermined value, the solenoid valve 42 may be energized. In addition, in the example,
Although a sound of a predetermined frequency is generated from the speaker of the remote operation board REM, the parameter corresponding to the pressed key may be outputted in the form of voice. In that case, a circuit configuration as shown in FIG. 18 may be used, for example. In FIG. 18, 239. Z40 and Z4
1 is TMSl manufactured by Texas Instruments Co., Ltd.
ooO, 7MS5100 and TMS6100.

TMSlooO is a microprocessor, TMS5]00
is a voice synthesis chip, TMS6100 is 128 K bi
This is a mask ROM of t. Connector Jll is arithmetic bag [C
Connect to PU1 and CPU2, and each calculation bag [CPU1.
A predetermined sound generation command is outputted from the CPU 2 to the microprocessor 236, and the sound signal outputted from the Z37 is supplied to the remote control board REM.

As described above, according to the present invention, the driving state of the artificial heart can be freely changed by remote control, so that a doctor can directly operate the artificial heart driving device.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an artificial heart drive device showing one embodiment, Fig. 2a is a front view of a remote operation unit I-REM,
FIG. 211 is an enlarged sectional view taken along line nn in FIG. 2a, FIG. 3 is a perspective view of the caster, and FIG. 4a. Figures 4b, 4c, and 4d are a front view and a left side view, respectively, of a casing constituting a caster. A right side view and a vertical sectional view, FIG. 5 is a front view of the bolt that fixes the caster, FIGS. 6a and 6b are a front view and left side view of the stand that supports the caster, and FIG. 7 is an artificial heart drive. A partially cutaway front view showing the connection between the device body and casters, Figures 8a, 8b, 8c,
Figures 8d and 8e are a perspective view and a cross-sectional view showing the tank unit in the artificial heart drive device, a sectional view taken along the line ■C-■C in Figure 8b, and a partially enlarged cross-section showing the connection between the terminal and the tank, respectively. Figures 9a and 9b are partially enlarged sectional views showing the connection between the pressure sensor and the tank. 9c and 9d are a plan view, a right side view, a left side view, and an enlarged vertical sectional view of the electromagnetic valve 4231-, respectively, and FIG. 1O is a block diagram showing the general configuration of the artificial heart drive device shown in FIG. 1. Figure 11 shows the calculation bag [CP] shown in Figure 10.
12 is a block diagram showing the configuration of the UJ, 2, FIG. 12 is a circuit diagram showing the configuration of the remote operation unit, FIG. 13a and 1
Fig. 3b is a circuit diagram showing the circuit configuration of the control device CoN1 shown in Fig. 10, and Fig. 14 is a circuit diagram showing the circuit configuration of the control device CoN1 shown in Fig. 10.
A circuit diagram showing the circuit configuration of No. 2, Fig. 15 is the sound generator S.
FIG. 16a is a block diagram showing the circuit configuration of the GU. FIG. 16b and FIG. 16c each show the arithmetic unit CPU.
17 is a flowchart showing the operation flow of the arithmetic unit cPU2, and FIG. 18 is a block diagram of a sound generating device according to another embodiment of the present invention. It is. l2 Artificial heart drive device main body 2a, 2b: Tube 3:
Caster 4: Casing 5 Niblint board
6: Film 7, 8: Hole 11: Valve housing 1
2, 13: Boat 32- 14: Valve seat 15, 16: Inner chamber 17: Seal material 18:
Coil case 19: Coil 20: Bobbin 21, 22: Magnetic base 23: 8 constant magnetic core 24 Guide rod 25: Movable magnetic core
26: Coil spring 27: Bearing 28: Bellows 29: Valve body 30. 37: Small hole 31: Casing 32: Bolt 33: Stand 34: Protrusion 35 Niji-
Ring vinyl 36: Packaging 40: Tank unit 41: Pressure sensor 42: Solenoid valve (1st and 3rd solenoid valve) 43: Solenoid valve (2nd and 4th solenoid valve) 44. 46, 47: Panel 45: Hole 48.49.
50: Tube 51: Terminal 52.53: Connector 94 b'EEJ f! 14,
B @ bud μcTL” 1 5th V 躬6b 6th a■ 8th bIl] 躬8c Anti-JP-A-1973-IG94G2 (13) Fan 16a Anti-foil 16b Aη17V

Claims (7)

[Claims] (1) Positive pressure generation means; A first solenoid valve connected to the positive pressure generation means; A first accumulator connected to the first solenoid valve; A second solenoid valve connected to the first accumulator; a first pressure detection means provided between the first solenoid valve and the second solenoid valve; a positive pressure generation means; a third solenoid valve connected to the positive pressure generation means; a third solenoid valve connected to the third solenoid valve. a second accumulator; a fourth solenoid valve connected to the second accumulator; a second pressure detection means provided between the third solenoid valve and the fourth solenoid valve; The solenoid valves No. 3 are controlled to open and close so that the detected pressures of the first pressure detecting means and the second pressure detecting means are equal to a preset pressure, respectively, and the second
A control device that controls the opening and closing of the solenoid valve and the fourth solenoid valve at predetermined timing, respectively; and a remote control means that is movable relative to the control device and has a switch means that gives instructions to the control device; Heart drive device. (2) The artificial heart drive device according to claim 1, wherein the remote control means and the control device are connected by an electric conductor cable. (3) The artificial heart drive bag W0 according to claim (1), wherein the remote control means is provided with a switch means inside a case whose operation surface is covered with a flexible material. (4) At least one of the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve is connected to the first or second solenoid valve.
An artificial heart drive device according to claim 1, which is provided inside an accunorator. (5) The first solenoid valve and the second solenoid valve are provided in the first accumulator, and the third solenoid valve and the fourth solenoid valve are provided in the second accumulator. ) The artificial heart drive device described in item 2. (6) At least one of the first solenoid valve and the third solenoid valve is arranged such that a fixed magnetic core and a movable magnetic core are arranged at the axis of the electric coil, and a movable magnetic core is arranged relative to the fixed magnetic core. The artificial heart drive device according to claim 1, comprising an electromagnetic control valve movable in a direction along the axis. (7) In the electromagnetic control valve, the mutually opposing surfaces of the fixed magnetic core and the movable magnetic core have one side shaped like a chevron and the other side shaped concave to receive the central protrusion in their longitudinal cross section;
The artificial heart drive device according to claim 6, wherein the inner surface of the chevron-shaped protrusion at both ends or the outer surface of the concave protrusion at both ends are tapered.