JPH0229235A - Organism signal measuring device - Google Patents

Abstract

PURPOSE:To shorten inspection time and to enable execution of heart catheter inspection with high safety by a method wherein a measuring process is prestored in a memory means, the measuring process is selected according to a measuring condition and automatically executed by means of a microcomputer. CONSTITUTION:An analogue signal for a blood pressure waveform by means of which a doctor 6 inserts a catheter 5 in a heart 1a of a patient 1 to be inspected in an inspecting room 20 to measure an endocardial pressure in a given portion is fed to a measuring part 15 through a transducer 7. After that, a blood pressure waveform is displayed on the CRT screen of a monitor device 13 and a blood pressure waveform is stored on the recording sheet of a recorder 14. A data bus and a control bus 17 are connected between the measuring part 15 and a CPU 16 to control the motion of the measuring part 15. Input set data from a key board 19 by means of which a measuring process is set and executed is fed to the CPU 16, and a set process is stored in a memory 18. This constitution eliminates the need to repeat the same operation at each measuring portion and enables prevention of the occurrence of malfunction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a biological signal measuring device suitable for use in cardiac catheterization.

[Summary of the invention]

The present invention relates to a biosignal measuring device suitable for use in cardiac catheterization, and more particularly to a biosignal measuring device that measures the intracardiac pressure of a subject using an invasive measuring means and supplies the measured intracardiac pressure to a recording and monitoring means. A microcomputer including a storage means and an input means is associated with the measurement means, and the measurement process is stored in advance in the storage means or inputted with the input means,
The measurement process is selected according to the measurement conditions and automatically executed by a microcomputer, thereby shortening the examination time and enabling highly safe cardiac catheterization.

[Conventional technology]

An example of a conventional biological signal measuring device for performing cardiac catheterization and the like will be explained with reference to FIG.

FIG. 4 is a system diagram showing an example of a cardiac catheterization apparatus.

In FIG. 4, a bed (2) is arranged in the examination room (20), and a subject (1) is placed on the bed (2). A catheter (5) is inserted into the heart II (la) of a subject (1), and intracardiac pressure inside the heart is measured. When the doctor (6) inserts the catheter (5) into the heart (1a), the X-ray camera (3) constantly images the subject's (1) heart, and the X-ray monitor (4) Intracardiac pressure measurement is performed while viewing the imaged image of the subject (1) and heart (1a). A drip bottle (9) or the like is suspended from the catheter mounting table (8), and glucose, physiological saline, or the like is supplied thereto.

The internal pressure measuring transducer (7) is placed at approximately the same height as the heart of the subject (1).

The detection signal of the transducer (7) is sent to the head amplifier (1).
0) and the monitor device (1) through the monitor amplifier (11).
3) and a recorder (14), where the intracardiac pressure waveform and electrocardiogram waveform are monitored and recorded.

In addition to the doctor (6), the operator of the monitor device (13) etc. operates the head amplifier (10) according to the measurement site of the catheter (5).
), the monitor amplifier (11), the monitor device (13), and the various function knobs (12) provided on the recorder (14) are manually operated.

For example, when considering the case where the tip of the catheter (5) is inserted and held in the heart and the intracardiac pressure is measured invasively, first insert the tip of the catheter (5) into the measurement site, such as the left atrium or the right ventricle. After specifying the intake pressure site where measurements will be taken, a recorder (
14) and the monitor device (13), and perform a sensitivity switching operation. Next, check the recording paper feed speed of the recorder (14) and select the feed speed. Operations include pressing a start button to start the recorder (14), and pressing a recording end button when recording is completed. In addition, there is a pull-back test or recording of the average pressure waveform of a low-pressure system, and in one cardiac catheter test, at least 10 measurement sites are measured.

[Problem to be solved by the invention]

In the biosignal measuring device used for cardiac catheterization with the conventional configuration described above, the catheter (5) is inserted from the carotid artery, etc., and its tip is held in the atrium or ventricle of the heart m (la), so there is a high degree of risk. This is an expensive test, and the time required for the test must be kept as short as possible. However, each of the above-mentioned operations is performed manually for the number of sites to be measured, so even if a skilled technician performs these operations, it will take a long time. There was a problem that required it.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a biological signal measuring device that can shorten the examination time and perform highly safe cardiac catheterization examinations. .

[Means to solve the problem]

An example of the biological signal measuring device of the present invention is shown in FIGS.
As shown in the figure, the intracardiac pressure of the subject (1) is measured using an invasive measuring means (15), and the intracardiac pressure of the subject (1) is measured using a recording and monitoring means (14).
), (13) In the biomeasuring device, a microcomputer (16) including a storage means (18) and an input means (19) is connected to a measuring means (15).
The measurement process is stored in advance in the storage means (18) or inputted with the input means (19), and the measurement process is selected according to the measurement conditions and then the microcomputer (1
6) is automatically executed.

[Effect]

The biological signal measuring device of the present invention automates the measurement operation procedure by storing the measurement process in the memory in advance, thereby shortening the cardiac catheterization time and allowing highly safe testing.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the biological signal measuring device of the present invention will be described with reference to FIGS. 1 to 3 as a cardiac catheterization device.

Note that parts corresponding to those in FIG. 4 are designated by the same reference numerals, and redundant explanation will be omitted.

In Fig. 1, a doctor (6) inserts a catheter (5) into the heart m (la) of a subject (1) in an examination room (20) and measures the intracardiac pressure at a predetermined location. Blood pressure waveforms, etc. The analog signal is sent to the head amplifier (1o) through the transducer (7).
) and the monitor amplifier (11) (see Figure 4).
The blood pressure waveform etc. is displayed on the RT screen and the recorder (14
) Record the blood pressure waveform, etc. on the recording paper.

Measurement 1m (15) and microcomputer (hereinafter CP)
A data bus and a control bus (17) are connected between >(1, 6), denoted by U, and the operation of the measuring section (15) is controlled via these buses. This CPU (16) has a keyboard (keyboard) for setting and executing measurement processes.
19) is supplied, and the normal CP
A configuration process is stored in a memory (18) such as a RAM in the U (16).

With the above-mentioned configuration, the doctor (6) and the operator who operates the measuring unit (15), the monitor device (13), the recorder (14), etc., perform various tasks when measuring intracardiac pressure, etc., as in the past. A necessary measurement process is created before the inspection using the keyboard (19) on the CRT of the monitor device (13) without performing any process operations. Alternatively, select a preset process pattern. Make corrections as necessary when selecting. Alternatively, the set process pattern may be written in a ROM or the like, and the entire memory may be replaced.

There are various cases of process pattern settings.
The table in FIG. 3 shows an example of the intracardiac pressure measurement process.

In Figure 3, the measurement execution order 1.2.3.4.5... for each measurement mode, measurement site, average positive waveform recording of the low pressure system of the recorder, recording speed of the recorder, recording time, measurement Part (15
), the sensitivity settings of the recorder (14), etc. are determined.

In the case of execution order 1, measurement is performed in the normal measurement mode, and in channel 1 of the measurement site, for example, the vena cava (H-3VC)
When the catheter (5) is inserted and held at is set to 200 mm/S. Recorder (14)
The recording time is 5 seconds, and the sensitivity of the measuring unit (15) and recorder (14) is set to 20 mmt (g/V).

Hereinafter, the measurement execution order is similarly selected as 2.3.4.5... In addition, when the rRAJ displayed on the first channel of the measurement site is measured by inserting the tip of the right atrium ratio catheter (5), rRVJ is the right ventricular supra catheter (5).
When measuring by inserting the tip of the catheter, rRV → RAJ is when measuring by moving the catheter from the right ventricle to the right atrium.
rRVJ indicates the case where the tips of two catheters (5) are inserted into the right atrium and right ventricle for measurement, and rPt and BKJ displayed in the measurement mode of execution order 4 indicate a pullback test. There is.

The above example is just one example, and includes setting of frequency characteristics in the measurement section (15), start and stop settings of the recorder (14), etc.

One or more such intracardiac pressure measurement processes are created depending on the test contents of the subject, stored in the memo IJ (18), and called up and selected on the CRT before the cardiac catheterization test.

FIG. 2 is a process flow for intracardiac pressure measurement performed invasively in cardiac catheterization.

The keyboard (19) is provided with a back key (19a) for returning the measurement process read into the memory, a skip key (19C) for skipping the measurement execution order, and an execution key (19b) for executing the measurement process.

First, the measurement process contents of execution order 1 shown in Fig. 3 are set to execution, and a catheter (
5) When the tip of step ST is inserted, the execution key (19b) is pressed as shown in the first step ST. Next, C
As shown in the second step ST2, P U (16) judges whether the recording sensitivity state of the recorder (14) becomes 20 mm) Ig/V and is appropriate, and if "No", the As shown in step 3 ST3, change the sensitivity and
mmHg/V, and a calibration waveform is recorded in a fourth step ST, leading to a fifth step ST5. 2nd step S
If the recording sensitivity is appropriate and the state is "YES" at T2, the recording paper feed speed is set to 200mmt1g at the fifth step STs.
/V, the CPU (16) judges whether it is appropriate or not. If "No", the paper feed speed is selected to 2QOmm/sec as shown in the sixth step STs, and the process proceeds to the seventh step ST□. . If the fifth step STs is "YES", the seventh step ST is also executed.

Proceed to. In the seventh step ST, the recording device (14) starts recording.

When recording starts, the CPU (16) determines whether or not a predetermined recording waveform has been recorded on the recording paper for 5 seconds, and continues monitoring until the process set time comes. When the recording for 5 seconds is completed, recording is stopped as shown in the ninth step sTs. Next, in a tenth step ST, it is determined whether or not to record the average waveform. Then the CPU (16) judges “N
o", the process advances to the 15th step 5T1s following the next measurement execution order 2. However, in the case of measurement execution order 1, since the average recording is set to the "on" state, the process advances to the next 11th step. The amplifier in the measuring section (15') is switched to the average value at S street, and the average recording is started at the 12th step 5T12. At the 13th step ST, 3, it is checked whether the required time (55ec in this case) has been recorded. CP the judgment
If tJ(16) is "NO", return to the 13th step 5T13, but if YES, return to the 14th step 5T
14, the recording is stopped and the next execution order 2, 15th
The process moves to step ST+s.

In the 15th step ST+s, the doctor (6) uses the catheter (
After inserting the tip of 5) into the right atrium, press the execution key (19).
b) is pressed, and the CPU (16) then automatically makes various settings in the same manner as the flowchart in FIG. Such operations are performed in the order of execution 3→4→5→....

If you need to perform the same measurement again in each of the above measurement processes, press the back key (19a) to return to the original state.If you want to skip and proceed, press the skip key (19C).
You can move to the next execution order number by pressing .

According to this example, the only manual key operation required for one site measurement is to press the execution key (19b), which not only greatly reduces the examination time for cardiac catheters, but also allows each site to be measured individually. Since there is no need to repeat similar operations over and over again, and erroneous operations can be prevented, cardiac catheterization can be performed in a short time without requiring a skilled operator.

Note that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

According to the biological signal measuring device of the present invention, the examination time can be shortened, and the cardiac catheter examination can be performed with high safety.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of the biosignal measuring device of the present invention, Fig. 2 is a flowchart of blood pressure measurement by the biosignal measuring device of the present invention, Fig. 3 is a table showing an example of creating necessary processes of the present invention, and Fig. 4 is a system diagram of a conventional biological signal measuring device. (1] is the subject, (la) is the heart, (2) is the bed, (
5) is a catheter, (6) is a doctor, (7) is a transducer, (10) is a head amplifier, (13) is a monitor device, (14) is a recorder, (15) is a measurement unit, (16)
It CPU, (1g) It Memory, (19
) is the keyboard, and (20) is the examination room.

Claims (1)

[Scope of Claim] A biological signal measuring device configured to measure intracardiac pressure of a subject using an invasive measuring means and supplying the measured value to a recording and monitoring means, comprising: a microcomputer comprising a storage means and an input means; A computer is associated with the measuring means, a measuring process is stored in the storage means in advance, or is inputted using the input means, and the measuring process is selected according to the measurement conditions and automatically executed by the microcomputer. A biological signal measuring device characterized in that it is configured as follows.