JPS61226057A - Apparatus for monitoring driving of artificial heart - 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]

[Object 1 of the invention] (Industry-1- Utilization bone!l!F) The present invention relates to a monitoring device for the Daio heart drive device 6, and in particular monitors the driving state of the artificial heart pump and detects when y4 always occurs. and a monitoring device 6 for warning this. (Prior Art) Generally, artificial hearts are divided into total replacement artificial hearts and auxiliary artificial hearts depending on how they are used. 11d 4;l, a living heart is removed and a human heart is used in its place.Also, the auxiliary world heart 1 general otsuko, ]'i・t[later bovine body 11,
The function of one organ is not sufficient, and the necessary white fluid circulation or phlegm (,
-Tek4 (unusual, hard-working, conventional auxiliary circulation machine 2): (
For example, intra-aortic balloon pink;
There is one disclosed in Japanese Patent Laid-Open No. 54128969. This device uses gas or liquid as the working medium for contracting and expanding the artificial heart. and,
Linear as a power source to suck and compress this working medium: [
- Equipped with a bag that compresses and expands by the movement of the mold (IM, reciprocation of this linear motor). The bag t is connected to the human heart, and the working medium in the bag is repeatedly compressed and expanded in response to the reciprocating movement of the linear motor, thereby driving the artificial heart. In this example, the driving means for expanding the bag is placed in the pot, but in this case, the linear motor and the bag are placed inside the casing, and the bag is expanded. The other bag is configured to expand due to the pressure that governs the contraction.At this time, if the inside of the gauging becomes excessively 1"1 pressure, the m
For example, it has a negative pressure adjustment mechanism such as Heroes' four damper mechanisms, an air pump, and a pressure sensor, so that the negative pressure inside the gauging is always at the required value. Furthermore, in this device, the driving pressure of the working medium is measured by a pressure sensor, and the pump is driven so that the driving pressure of the working medium is always at an appropriate value. The artificial heart drive device is equipped with a mechanism that automatically adjusts the driving pressure by injecting or extracting fluid into the bag. (Problem to be solved by the invention) The pressure is adjusted by the suction and pumping pump from the reservoir based on the signal from the pressure sensor.This does not directly control the operation of the artificial heart, as it only corrects the pressure of the working medium in [p7]. Therefore, in order to accurately control various conditions, such as blood pressure and auxiliary circulation 11↓, it is necessary to prevent the loss of blood flow or a significant decrease in blood flow, which can have a fatal effect on the living body. In order to recover quickly (4), it was necessary to attach a surface pressure detector, a blood flow detector, etc. to the cow's body and monitor this. However, for some reason, the blood flow rate was not adjusted properly. There is no device that actively monitors when the blood flow decreases below V. Therefore, the supervisor had to constantly monitor the artificial heart drive device. However, it was not possible to immediately determine whether or not the cause was due to the artificial heart drive device.Therefore, the present invention has been developed to improve

[The purpose is to warn of this.] [Structure of the invention]

(Means for Solving the Problems) Therefore, present invention 11 includes means for detecting the outflow blood flow rate of an artificial heart, outflow blood flow rate setting means, and when the detection output of the detection means is smaller than the set value of the setting means. and an alarm means driven by the output of the comparison means. (Function) According to this, if the set value of the outflow blood flow rate is set by the setting means, if the outflow blood flow rate of the artificial heart is 2r smaller than this set value, this can be detected and an alarm will be issued. I can do it. (Example) The present invention will be described in detail below based on the drawings. An artificial heart drive monitoring device of the present invention is shown in FIG. In this embodiment, the artificial heart drive monitoring device is a so-called one-chip microcomputer 11 (hereinafter referred to as microcomputer 11).
It is made up of. The outflow blood flow rate of the artificial heart is determined by inputting an output obtained from a blood flow rate detection means (not shown) to the A/D converter 12. The A/D converter 12 is
The analog signal from the blood flow rate detection means is converted into a 12-bit digital value and input to the input terminal 11a of the microcomputer 11.
Output to. Further, the pressure of the drive source that drives the artificial heart is detected by the pressure detection means. The output obtained from the first stage of pressure detection 1 is directly converted from an analog value into a 12-bit decimal by an A/D converter 12.
The signal is input to the input terminal 11a of the microcomputer 11. In Fig. 1, in addition to the signals input to the A/[]21 heart rate sensor 12, LB represents the left heart blood flow rate, I-A represents the left heart driving pressure, and Rr> represents the right heart blood flow. RA represents the flow rate, and RA represents the human power of the right heart driving pressure. The input terminal 111) of the microcomputer I is connected to the output of the key input section 13, which is a setting means. Output terminals 1c and lid of the microcomputer 11 are respectively connected to a buzzer 15 and a lamp 16, which are alarm means. Furthermore, if the output terminal Iff of the microcomputer 11 is
It is connected to the FMI transmission unit 17 which is a transmission means. The output of the F'' M l-lanmitter 17 is connected to the antenna 18.
output terminal]]e4;t, display means, CI)
It is connected to the display 14. L CD display 14,
I-CD drive circuit 14a and 1. It consists of CD14b. My-1-1] Bakono L CI')
An 8-bit data signal and a 3-bit control signal are output to the drive circuit 14a. Here, the blood flow rate detection means also uses a signal from a blood flow 81 attached to the living body when the artificial heart is used. As this blood flow meter, for example, an electromagnetic blood flow meter Ml-1200 manufactured by +1,1 Koden Co., Ltd. can be used. Since this blood flow meter can obtain the average diversion as an output, 1, this signal can be input as is. Further, the pressure detection means can use a signal from a pressure sensor for measuring driving pressure disposed within the Daio heart driving device. This is, for example, identical, -iLj
A pressure sensor for detecting the driving pressure of an artificial heart driving device disclosed in Japanese Patent Application No. 1982-213750 filed earlier by one person. For example, it is possible to use the output of a pressure sensor that detects the pressure on the primary side of a fluid isolake that converts drive pressure into gas pressure such as helium. Note that a pressure sensor for measuring driving pressure may be specially installed in the LJ. Next, FIG. 2 shows a plan view of the key manpower unit 13, and the contents of the instructions will be explained. Channel selection key] 3 a
+: 1. This key is used to select the setting contents when setting the set value, that is, left heart, right heart 1111 liquid flow rate or left heart, right heart drive pressure.The setting channel changes each time it is pressed. Upper/lower limit value selection key 13b, channel selection key]
This key is used to select whether to set the upper limit value or the lower limit value of the setting content selected in step 3a. The buzzer set key 13C is a key for turning on and off the buzzer I5, and can turn on and off the operation of the buzzer 15. The code key +3d is the setting value 1 when setting the setting value.
This is a key for selecting -1-. Numeric keys 13e, 13f
, 13g are keys for entering setting values, each -1
- A numerical value from 0 to 9 is assigned to each. set key 13
h is a key for setting a set value in the microcomputer 11, and after inputting a set value by operating each of the two keys, pressing the key will erase the set value. Next, in Figure 3, 1. A display screen displayed on the LCD 14b of the CD display 14 is shown. LCD14b20 characters x 4
It consists of lines. Display section 14. C displays each channel. In each channel, LB indicates the left heart blood flow rate, T and A indicate the left heart drive pressure, RB indicates the right heart blood flow, and RΔ indicates the right heart drive pressure. The display section 14d displays the status of the buzzer 15. When "B" is displayed here, it indicates that the buzzer is set. The display section 14e is
The two-limit value of each channel is displayed using the signs -1 and - and a three-digit decimal number. Display section 1.4 f is →−・−
The detection value of each channel is displayed using the sign and 3-digit decimal number. The lower limit value of each channel is displayed on the display section using signs of +4gt;l, tens and -, and a three-digit decimal number. Each of these display sections displays the manually inputted value from the key input section 131 and the detected value of the detection means. Therefore, when a detected value is within the set value or detected value range where "B" is displayed on the display section 14d corresponding to each of the display sections 14e, 14f, and l'4g,
This indicates that the buzzer 45 is activated. Returning to FIG. 1 again, explanation will be given. FMI Lancemitter 1
7 receives the parallel 4-bit controller from the mini-1 pin 11, and uses it as a 1M with a wave number of 150 MITZ.
Transmit as weak radio waves. FIG. 4 shows a receiver 40 which is a receiving means for receiving the Fl, /I radio waves. Ti'M receiver 41, FM
It receives the FM radio wave transmitted from the i-transmitter 17, demodulates it again into 4-bit data, and outputs it to the input terminal 42a of the microcomputer 42. A buzzer 44 and a lamp 45, which serve as alarm means, are connected to the output terminals 421) and 42C of the microcomputer 42, respectively. Further, an output terminal 42d of the microcomputer 42 is connected to an LCD display 43 serving as a display means. L
The CD display 43 includes an LCD drive circuit 43a and an LCD.
43b. This 1. , CD display 4
The screen displayed on the LCr) 43b of No. 3 is the same as the content displayed on the I7CD 14b of the monitoring device 10 described above. Therefore, the microcomputer 42 processes the 4-bit data from the FM receiver 41 and outputs it as an 8-bit data signal and a 3-bit control signal to the LCD drive circuit 43a. Note that the receiver 40 is equipped with a battery 46 as a power source, so that the receiver 40 can be used apart from the monitoring device 10. Next, microcomputer 1 is shown in Figures 5, 6, 7, and 8.
1 shows a flowchart i. First, in step S1, the input/output ports of the microcomputer 11 are set. In step S2, 1, Cr) the display 14 is cleared. The process waits until the key 13 is input in step S3. Next, various controls are performed in response to inputs from the keys 13. key 1
I-, 1 of the display section 14C of LCD] 4 in sequence by 3a.
3. Blink LA, RB, RA (step S4.S
5). The key 13b is used to select the one limit value or the lower limit value of the channel selected by the key +3a (step S6
, S7). Turning the buzzer 15 on or off is selected using the key 13c (steps S8 and S9). Select the sign of the upper limit value or lower limit value using the key 13d (step si
The selected upper limit value or lower limit value is selected as a three-digit numerical value using the keys 13e, 13f, and 13g (step S]2.S]3). Finally, the set values set using these keys are set in the microcomputer 11 using the key 13h (step SKI, S]5). The following control is performed using the setting values set in this way. First, in step S16, the detected value of T-B is read. In step S17, this detected value is
] Output to 4 and display this. This display output subroutine is shown in FIG. Here, in step S80, 8 is set as the cursor address.
The data signal of PITSU I is outputted to the LCD driving circuit 14a. Then, in step S8], the data signal is output as an 8-pin signal to the LCD driving circuit 14a. If all data signals have been output in step S82, the process returns. Next, perform the process of the determination subroutine in step S]8.
cormorant. Here, this determination subroutine is shown in FIG. First, in step S60, the detected value and the -1-limit value are compared. As a result, if the detected value is thicker, step S6
2 causes the upper limit value displayed in LCr)l/I to blink. In step S63, it is determined whether or not the buzzer 15 is set to operate in accordance with the upper limit value. If it is set, the buzzer 15 is turned on in step S64, and the lamp 16 is turned on in step S365. If the detected value is small in step S61, then in step S66 the detected value is compared with a lower limit value. As a result, if the detected value is smaller, step 368
The lower limit value displayed on the LCD 14 is made to blink. In step S69, it is determined whether or not the buzzer 15 is set to operate in accordance with the lower limit value. If it is set, the buzzer 15 is turned on in step S70, and step S
At 71, the lamp 16 is turned on. After the above processing, the process returns to the main routine in FIG. Below, step SI9. S20,321 is I. This is a judgment process for the detected value of A, and the display routine (step 520) at this time is the same as the L CD output subroutine. Further, as a determination subroutine (step 521), a routine similar to the determination subroutine shown in FIG. 6 is provided. Further, the processing in this routine is similar to the above-mentioned 1=B judgment routine. Steps S22 and S2 are determination processing for RT3.
3. Step S25. is a determination process for S24 and RA. S26. The processing in S27 is also similar to the LCD output subroutine and LB determination subroutine described above. Therefore, through each of these determination processes, each detected value is converted to LCT.
) 14b, each detected value is compared with each set value, and the buzzer 15 and lamp 16 can be activated depending on the activation set state of the buzzer 15 at this time. These determination results are sent to the FMI-
The signal is output to the transmitter 17. This is shown in Figure 8.
It is shown as an M transmitter subroutine. This is done by outputting each data in step S83 and
When all data has been output or completed in step 84, the process returns. Although the flow of control of the microcomputer 42 of the receiver shown in FIG. 4 is not shown here, this is the data sent from the FMI transmitter 17 after processing the data after the judgment subroutine processing, that is, the ON signal of the buzzer and lamp. Then, the microcomputer 42 only needs to turn on the buzzer 44 and the lamp 45 in response to this message. Furthermore, at this time,
An output signal to the LCD display 43 is also required as the transmission data. As another method, if the data transmitted from the FMI transmitter 17 are used as detected values, set values, and display signals, the microcomputer 42 of the receiver may be provided with a determination subroutine shown in 5H. Note that the receiver may be provided with a key so that setting values can be set from the receiver side as well. Next, the operation will be explained by showing signal waveforms of each detection means in FIG. In FIG. 5, the driving pressure I. The upper limit value Ph and lower limit value Pl of the blood flow rate LB are set, and the lower limit value Bh and lower limit value Bl of the blood flow rate LB are set. Here, the blood flow rate is the average blood flow rate output from the blood flow meter, so it is shown here. Therefore, the average surface meteor fluctuates while maintaining a certain value as shown in FIG. Also, the buzzer is set to turn on when the blood flow 3i1,B decreases below a set value. At this time, due to some reason, the blood flow I
When LB decreases and becomes smaller than the lower limit of LB (iBI), this is determined and the buzzer and lamp are turned on. At this time, the cause of the decrease in blood flow LB is, for example, the drive from the drive source to the artificial heart. If the artificial heart drive tube is bent or clogged, there is no abnormality in the output waveform of driving pressure 1, A. Therefore, in this case, some abnormality is occurring on the living body side rather than on the artificial heart drive device. On the other hand, if there is an abnormality in the driving pressure LA, the blood flow L
The cause of the decrease in B fJ is the artificial heart drive device itself. Therefore, if the driving pressure is normal, it is necessary to check the equipment such as the artificial heart pump or the living body, and if the driving pressure is abnormal, the artificial heart driving device must be adjusted. Indicates that repair, etc. is required. As described above, by providing the alarm means and the display means, it is possible to immediately determine the location where an abnormality has occurred. In addition, in the embodiment described in ``-'', only the case where the blood flow rate is lower than the set value is explained, but it is also possible to issue an alarm when the blood flow rate exceeds the set value. In addition, in the above embodiment, if two or two types of buzzers and/or lamps are used, and the buzzer operation is set for each blood flow rate and drive pressure, the above abnormality judgment can be made using the buzzer and/or lamp. It can be determined by That is, for example, one buzzer and/or lamp is turned on when the blood flow is less than the lower limit, and another buzzer and/or lamp is turned on when the upper and/or lower limit of the driving pressure is not within the set value. Just turn it on. At this time, the number of buzzers and/or lamps does not necessarily need to be two or two types. Even with one buzzer and lamp, when the first condition is satisfied, the buzzer and lamp are activated, and when the second condition is satisfied, for example, the buzzer and lamp are activated intermittently. However, two types of alarms are possible. In addition, if the drive 11-force or actual condition is required, and repair or repair of the artificial heart drive device itself is necessary, the patent application previously published by the same applicant [并并58-21375(1) It is also possible to make the automatic switching device described in the issue 1. [Effects of the Invention] According to the present invention as described in I-1-1, if the setting value of the outflow blood flow rate is set by the setting means, the outflow blood flow rate of the artificial heart can be changed automatically. If becomes smaller than this set value, this can be detected and a warning can be issued. TWK-i'r1 (7) Fi-is'!-ノ;N
Ry2. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a plan view showing a key of an embodiment of the present invention.
3 is a plan view showing a display screen of an LCD display according to an embodiment of the present invention, FIG. 4 is a block diagram showing a receiver according to an embodiment of the present invention, FIG. 7th I4 o, 1,
Figure 8 shows the outline of the operation of the microcomputer according to the embodiment of the present invention in flowchart 1, and Figure 9 shows the changes in driving force and blood flow 1t in flowchart 7.11.42 ...Micro convenience store 1. -Yuu (1. Shenjo means, 2nd trial 1)
1st stage, setting means), 13...key (setting means), ]4
．． 43...L CI) Indicator (alarm means, display means)
, +5. , I, I... Buzzer (Kikou (4 means), 16
．． 45...Lamp (alarm means), 17...FM l
- Lancemitter (warning means, radio wave transmitting means), 41.
...FM receiver (alarm means, receiving means) 1 person for patent Representative: Aisin Seiki Co., Ltd. Reio Nakai Co., Ltd. Representative: New Industry Development Takeo Ishii Figure 6 Figure 7 Figure 8 $8

Claims (5)

[Claims] (1) means for detecting the outflow blood flow rate of the artificial heart, outflow blood flow rate setting means, comparison means for detecting a case where the detection output of the detection means is smaller than the set value of the setting means, and the output of the comparison means An artificial heart drive monitoring device comprising an alarm means driven by. (2) The artificial heart drive monitoring device includes means for detecting the pressure of a drive source that drives the artificial heart, a pressure setting means, and a device for comparing an output of the pressure detection means with a set value of the pressure setting means. 2. The artificial heart drive monitoring device according to claim 1, comprising a second comparison means and a second alarm means driven by the output of the second comparison means. (3) The artificial heart drive monitoring device according to claim 1, wherein the alarm means includes means for displaying the detection output of the detection means and the set value of the setting means. (4) The alarm means includes means for displaying the detection output of the detection means and the setting value of the setting means, and
The artificial heart drive monitoring device according to claim 2, wherein the alarm means includes means for displaying the detection output of the pressure detection means and the set value of the pressure setting means. (5) The above-mentioned patent claim, wherein the alarm means includes a radio wave transmitting means and a radio wave receiving means, the output of the comparison means is transmitted by the radio wave transmitting means, and when the receiving means receives the output, the receiving means issues an alarm. The artificial heart drive monitoring device according to item 1.