JPS61106169A - Artificial dialytic 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 <Industrial Application Field> The present invention relates to an artificial dialysis apparatus for performing artificial dialysis of blood.

<Prior Art> As a conventional example of such an artificial dialysis apparatus, for example, a depressurization type artificial dialysis apparatus, the configuration of which is shown in FIG. 3, is known. In FIG. 3, 1 is a dialyzer having a dialysis membrane inside, and 2 is a blood circuit through which blood flows. This blood circuit 2, blood pump 3, arterial chamber 4
, and an arterial line 6 with a blood pressure sensor 5, as well as a venous line 8 with a venous chamber 7. The dialysate circuit consists of a supply line 12 with a supply valve 1o and a dialysate tank 11, and a discharge line 15 with a negative pressure pump 13 such as a roller pump and a three-way valve 14. Further, 16 is a metering circuit, and the metering circuit 16 includes a chamber 17 in the form of a drip cylinder whose air chamber is open to the outside air, a metering pump 18 (roller pump), and a liquid level in the chamber 17 that is kept at a constant value. It is comprised of a liquid level sensor (not shown) that outputs a signal to the metering pump 18. The control system including this liquid level sensor is configured to control the ultrafiltration ratio when the dialysate supply is interrupted.
It operates only when measuring power (hereinafter referred to as UFRP). 19 is a control unit, which includes an input boat 19m, a central processing unit (Central
Processing Unit, hereinafter referred to as CP
)19b, RAM19c, ROM
19d and an output port 19e. 2
0 is a display section that receives the output of the CPU 19b via the output port 19e and displays a bar graph for pattern setting. The control unit 19 inputs signals from the blood pressure sensor 5 and the dialysate pressure sensor 11, and calculates the ultrafiltration pressure (trans membrane pressure) obtained by performing predetermined calculations.
The drive control of the pressure relief pump 13 is performed by giving the pressure relief pump 13 an output that makes the difference between the pressure (hereinafter referred to as TMP) and a preset setting value zero. The control unit 19 also controls the operation timing of the liquid supply valve 1o and the three-way valve 14, and
measurement circuits are configured regularly.

In an artificial dialysis machine with such a configuration, dialysis and
Ultrafiltration is performed by continuously driving the blood pump 3 to flow blood into the blood circuit 2, opening the liquid supply valve 1o, and connecting the discharge line 15 to the discharge destination using the three-way zero valve 14. At this time, the fi TMP is controlled according to the set value by the operation of the control section 19, so that ultrafiltration corresponding to the set TMP is continuously performed in the dialyzer 1. In addition, for UFRP measurement, the liquid supply valve 10 is closed and the discharge line 15 is connected to the three-way zero valve 14.
is connected to the measuring circuit 16. At this time, the TMP is controlled according to the set value by the operation of the control unit 19, so ultrafiltration corresponding to the set TMP is continuously performed in the dialyzer I.
The liquid is led to a metering circuit 16, flows into a chamber 17, and is discharged by a metering pump 18 operated by a control system including a liquid level sensor. As a result, the liquid level in the chamber 17 is maintained constant, and the ultrafiltration amount (Ultra Filtra
tion.

In addition to determining the ultrafiltration rate (hereinafter referred to as UF) from the operating time of the metering pump 18,
ion Ratio.

(hereinafter referred to as VFR). And at this time T
UFRP (=UFR/TMP) is calculated from MP, and predetermined ultrafiltration is performed based on UFRP. Further, calculations for calculating the above-mentioned UF, UFR, UFRP, etc. are performed by the CPU 19b of the control unit 19,
The results of these calculations are sent to the display unit 2 via the output port 19e.
0 and displayed as a bar graph.

However, in the above-mentioned conventional example, each data display on the display section 2o is a 7-segment LED numerical display (
(bar graph display), and had the disadvantage that it was difficult to display various data graphically.

<Problems to be Solved by the Invention> The present invention has been made in view of the above drawbacks, and its purpose is to provide an artificial dialysis device that can display various data in graphic form and allows easy understanding of the data. be.

<Means for Solving the Problems> The present invention is characterized in that an artificial dialysis apparatus includes a display section that can display graphic image data, and a display control section that controls the image data displayed on the display section. , an image changeover switch, an input processing section that processes a signal sent from the switch, and a data output section that outputs image data and control data to the display control section are provided.

<Example> Hereinafter, the present invention will be described in detail using the drawings. 1st
The figure is an explanatory diagram of the configuration of an embodiment of the present invention. In the figure, the same symbols as in FIG. 3 are used with the same meaning, and repeated explanation here will be omitted. In addition, 19f is the image changeover switch 2 described later.
19g is a data output section that outputs image data and control data to a display control section 21 (described later) via an output port 19e; 201 is, for example, 64; X 100
It has a dot LCD display that shows the amount of water removed, the amount of heparin injected,
Blood flow rate, UFRP.

A display section 21 for displaying the TMP, UF, etc. is a display section 20'Ic that receives the output of the control section 191, and a display control section 20'Ic that is compatible with dots and has a storage capacity of, for example, 800 bytes. , 22 is an image changeover switch that sends a signal to change the image displayed on the display section 20 to the control section 19'. Incidentally, the ROM 19d stores a program for controlling the entire artificial dialysis apparatus.

Further, a part (for example, 800 bytes) of the RAM 19c serves as a work area for image data processing. Furthermore, it is stored in . In addition, the display control section 21 and the display section 20'
may be replaced with a CRT, a 5ub-CPU is placed in the data output section 1.9g, and this K ROM and RA
M may also be installed as a CPU dedicated to image processing. In this case, the CPU 19b only needs to send the switch data and the data on the RAM to the 5ub-CPU, so
Image processing will also be much faster. Furthermore, the input processing section 19f
It is assumed that the data output section 19g and the data output section 19g may be arranged outside the control section 191.

Regarding the embodiment of the present invention having such a configuration, the second
The operation will be explained below using the flowchart shown in the figure. In FIG. 1, the control section 19I.

Display section 20'1 display control section 21. The operations of the other parts except for the image changeover switch 22 are the same as those of the conventional example described in detail with reference to FIG. 3, and thus redundant explanation will be omitted here. In addition, the CPU 19b is 100
Each part of the artificial dialysis apparatus is controlled by an interrupt signal generated every ms, of which approximately 10 ms is allocated to data display.

Further, based on the relationship between the allocated time and the update speed of the screen displayed on the display section 201, the display relationship is divided into the following two control objects. That's it. The other method is to transfer the fixed image to the work area on the RAM 19c, read the necessary data on the RAM 19c, and then process the variable image and transfer it to the corresponding position in the work area. Control of transfer (hereinafter referred to as “Second
(referred to as "control"). Furthermore, the first control takes about 28 ms
The second control takes 30 to 50 ms, and these control objects are subdivided into each allocated time as follows. That is, the first control is divided into four parts each having a duration of approximately 7 ms, and the fixed image transfer time of the second control is approximately 3.5 ms.
ms, and the processing and transfer of the variable image in the second control is divided into 10 to 15 (for example, about 3 ms, depending on the type of image). In addition, the image changeover switch 2
Unless a new signal requesting image switching is sent from 2, data transfer of the fixed image portion is performed only once.

Therefore, even though it takes 400 ms to update one screen and a maximum of L5 sec to process data for one side, the processed data is sequentially displayed on the display unit 201 within 400 ms. It will become more and more popular.

Next, the operation after the initial operation when the power is turned on (that is, the data processing of the fixed image and variable image) will be explained using the flowchart shown in FIG.

In FIGS. 1 and 2, the image changeover switch 2
When data is input from 2 to the input processing section 19f via the input port 19a, this data is processed by the input processing section 19f and then read by the CPU 191) to determine which image is requested. After this determination, the CPU 19b again determines whether the image is the same as the previous image.

If it is determined that the images are not the same (No), half of the fixed image data is transferred to the work area of the RAM 19c, and the remaining half is sent to the data processing section 19g. If it is determined that both images are the same (YES), it is determined whether all fixed images have been transferred to the work area of the RAM 19c. If it is determined that all of the image data has not been transferred (No), the rest of the fixed image data is transferred to the work area of the RAM 19c, the variable image processing index N in the CPU 19b is set to 1, and the variable image data is transferred to the work area of the RAM 19c. The data is sent to the data output section 19g.

On the other hand, if it is determined that all the fixed images have been transferred (YES), the variable image data corresponding to the index N is processed, and then the data is transferred to the corresponding work area of the RAM 19c. At the same time, the index N is incremented by one. Next, it is determined whether all processing of the variable image data has been completed. If it is determined that all the steps have not been completed (No), the variable image data is sent to the data output section 19g. If it is determined that all the steps have been completed (YES), the index N is set to 1, and the variable image data is sent to the data output section 19g. In this way, the drawing data is sent from the CPU 19b to the data output section 19g through various routes. After that, the next contents of the work area divided into four in the RAM 19c are transferred to the CP.
The data is sent to the data output section 19g via U 19b, and the contents are sent to the display control section 21 via the output port 19e. Furthermore, graphical data is displayed on the display section 20' according to the output of the display control section 21. After completing this series of operations, the CPU 19b
controls the next controlled object. Furthermore, the state in which the previous data is displayed on the display section 20- is maintained until new data regarding the next controlled object is displayed. Furthermore, the second
In the flowchart shown in the figure, the series of sequences described between the judgment of "which image is requested" and the column of "output to data output section" differs only in the processing of fixed image data and variable image data. In this case, almost the same sequence may be written in the broken line portion of FIG. 2 for each image data.

<Effects of the Invention> According to the present invention as described in detail above, by simply pressing the image changeover switch 22, one display section 20' can display various graphical and graphical image data. Therefore, compared to the conventional example, data acquisition is easier and more information can be obtained. Another advantage is that, despite the large amount of information K, the area of the display section 20' for displaying this information can be small.

Furthermore, the display section 20' can display various data in the form of graphics or graphics, and can also display numbers at the same time, which has the advantage that the operator and the like can easily understand the displayed contents at a glance. Another advantage is that these displays can be easily changed, added, deleted, etc. by simply changing the software.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, FIG. 2 is a flowchart explaining a part of the operation of the embodiment of the invention, and FIG. 3 is an explanatory diagram of the configuration of a conventional example. 1...Dializer, 2...Blood circuit, 3,13.
18...Pump, 4,7,1. 'l...Chamber, 5.11...Pressure sensor, 10...Liquid supply valve, 14
... Three-way 0 valve, 19.191 ... Control section, 20.2
01... Display unit, 21... Display control unit, 22... Image changeover switch.

Claims (4)

[Claims] (1) In an artificial dialysis apparatus equipped with a control unit that controls an ultrafiltration rate, a display unit that can display graphic image data, a display control unit that controls the image data displayed on the display unit, an image changeover switch that generates a signal for switching the image data displayed on the display section, an input processing section that processes the switch signal sent from the switch, and outputs image data and control data to the display control section. An artificial dialysis device comprising: a data output section for (2) The artificial dialysis apparatus according to claim (1), wherein the display section is a 64 x 100 dot liquid crystal display. (3) The display control unit is a control unit having a storage capacity of 800 bytes.
Artificial dialysis device described in Section 1. (4) Any one of claims (1) to (3), wherein the input processing unit and the data output unit are mounted on a control unit that controls the operation of each component of the artificial dialysis apparatus. Artificial dialysis equipment described in .