JPS62261339A - Portable long-time electrocardiograph information recording 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 [Field of Industrial Application] The present invention relates to a portable long-term electrocardiogram 1 information recording device that stores and analyzes electrocardiograms FA.

[Prior art] - In general, when performing LJQ disconnection such as myocardial infarction or arrhythmia using electrocardiogram FCI, it is difficult to detect abnormal symptoms by performing an electrocardiogram only during a limited period of time when the person is at rest. It often does not appear. To check for such symptoms,
[1. Portable long-term electrocardiogram that can be used to continuously view and record electrocardiograms during daily life, or to extract abnormal areas.
An 11ifIll recording device has been devised. Conventionally, the long-term electrocardiogram information recording method for this rice plant is: (1) recording long-term electrocardiogram analog signals on magnetic tape using a small recorder; (2) incorporating a microprocessor into a portable device to analyze human-powered electrocardiogram signals in real time; , t'-Jq with built-in analysis results and abnormal part extraction results.

A method of storing data in a storage medium such as body memory or digital magnetic tape ■A portable device equipped with a small recorder, a microprocessor, and a semiconductor memory, records the electrocardiogram analog signal on a magnetic tape track, and simultaneously performs real-time analysis and analyzes the analysis results. Also, a method was used in which the results of extracting abnormal parts were recorded on empty tracks of magnetic tape.

[Problems to be solved] Among the conventional long-term electrocardiogram information recording methods mentioned above, method (■) reproduces the tape at a faster speed than the tape running speed at the time of recording.
This is a method for obtaining the entire recorded electrocardiogram, analysis results, and abnormal portion extraction results in a short time by using a separate high-speed playback device that can perform simultaneous analysis. However, high-speed playback and analysis has drawbacks such as a decline in the quality of the playback signal due to the performance limits of the magnetic tape playback head, and a reduction in analysis accuracy due to a reduction in processing time for analysis. was. Therefore, at present, it takes approximately 10 minutes to obtain an analysis result for one magnetic tape on which 24 hours of electrocardiograms have been recorded.
It takes about 30 minutes, and since the analysis accuracy is low, the doctor needs to over-read after the analysis, which increases the amount of time the doctor spends on each patient, making it difficult to increase the number of cases processed per hour. It was difficult.

In addition, with method (■), it is not possible to grasp all the circumstances within the recorded time without playing back and analyzing the magnetic tape.
Even in cases where no abnormalities occur, or in cases where the occurrence of abnormalities is infrequent, or cases where abnormal characters have gone out of order over a long period of time, the entire tape can be played back and analyzed in the same amount of time as normal playback and analysis. It required a lot of effort.

In order to solve these problems, the method (■) has been devised, which aims to shorten the time required to obtain the processing effect and improve the accuracy of analysis using No. 2 analysis when using human power without distortion. Since the entire ECG during the recorded analysis time is not recorded, it is not possible to confirm whether the analysis has been performed accurately and abnormal parts have been extracted, and the problem is that abnormalities occur frequently. There were problems such as it being impossible to confirm in cases where it was desired to know all the electrocardiograms during the recording time.Furthermore, if the storage medium in which analysis results such as abnormal electrocardiograms are accumulated is a semiconductor memory, its capacity is limited. This method has a drawback that the stored data is truncated if an abnormal part is detected that exceeds the capacity.Also, in this method, the contents of the memory are edited using a separately prepared data editing device. It is common practice to output a report using
Since it is necessary to connect the main body of the portable device to the editing device to transfer data, it is necessary to move the heavy portable device to the location where the editing device is located. There are problems in that it takes time to transfer, the operation becomes complicated, and the analyzed results cannot be saved unless they are transferred to another recording medium.

In the method of ■, all ECGs during the data recording time are recorded, analysis processing is performed in real time, and analysis results and abnormality extraction results are saved, which solves some of the problems of ■■ above. Although this problem has been solved, in order to grasp the transition of all trends during the recording time, 14 raw tapes are still required, and results cannot be obtained immediately.

In addition, in this method, analysis is performed using a microprocessor and semiconductor memory, and after the analysis is completed, the problem is that extra operations and time are required to copy and record the contents of the L conductor memory onto magnetic tape. had.

Furthermore, this method requires a configuration that includes both functions compared to the method described in ■■, and also requires a configuration that includes the functions of both types. The disadvantage is that the weight and shape of the device increases because 7-in-one means are required.

On the other hand, in the method described above, a common problem with the method of recording data on magnetic tape is that when the tape is repeatedly used and high-speed + LF raw material is emitted, scratches on the tape, dust, expansion and contraction due to temperature of the tape, playback head This has the disadvantage that the quality of the reproduced data deteriorates due to dirt, etc., and phenomena such as dropouts occur.゛ [Means for solving problems] This invention was made in view of the circumstances mentioned in 1 above, and has two types of recording means, magnetic tape and solid state memory, and is a portable device for storing and analyzing electrocardiogram numbers. In the long-term electrocardiogram information recording device, +i is added to the head magnetic tape.
(f) consisting of a magnetic tape recording unit for recording center-of-center electrocardiogram signals, and a real-time signal processing unit for analyzing the electrocardiogram signal and recording analysis results in the solid-state memory; It is characterized by being able to operate independently of the processing section.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view showing the magnetic tape recording section and real-time No. 43 processing section separated, and FIG. 3 is a perspective view showing the two connected parts. FIG. 4 is a block diagram of the configuration of one embodiment.

In Figure 1, (1) is a magnetic tape recording section, (2) is a real-time No. 1.1 processing section, and (3) is a battery storage section, each for the magnetic tape recording section and real-time signal processing section. (4) is a magnetic tape recording mechanism section, into which the cassette magnetic tape (7) is loaded.This cassette magnetic tape (7) contains a long-term analog ECG recorder. Further, a time signal and an event occurrence signal are recorded on the punch track.

(6) is a liquid crystal display, which displays the status of the apparatus and instruction messages to the subject.

(8) is a key operation unit, which is used as a key to control the operation of the entire device and to forcibly record and accumulate events when an abnormality is detected. (9) is the magnetic tape recording section (1)
This is a coupling mechanism that couples the real-time signal processing section (2) with the real-time signal processing section (2). (10) is the magnetic tape recording unit (1) and real time No. 12 IAE1. It is the 4X connection part with part (2),
Mainly real-time 45 via this signal connection (10)
A signal (analysis result by digital number 12, etc.) from the code processing section (2) is transferred to the magnetic tape recording section (1).

Reference numeral (11) is an electrocardiogram human power connector, and a signal power cable with an amplifier (13) is connected to this electrocardiogram human power connector (11). , when using the magnetic tape recording unit (1) and the real-time (l'?) processing unit (2) in a coupled state, the signal input cable (13) is connected to the real-time 45
Connected to No. 1 processing unit (2). In this case, electrocardiogram a, 5
The real-time number processing section (2) supplies the number to the magnetic tape recording section (1).

(12) is a RAM cart mounting part, which is connected to the main body by removing the RAM card (5). This RAM card (5) stores the results analyzed by the real-time signal processing unit (2) and electrocardiogram signals related to the extracted abnormal portions.

Next, in FIG. 4, reference numeral (100) is an electrocardiogram signal manual electrode, which is attached to the human body and transmits a signal to the real-time controller (2).

(lot) is an electrocardiogram A No. 5 amplifying section, which amplifies the electrocardiogram signal manually inputted from the electrocardiogram signal electrode (100) and outputs it to a buffer amplifier (102a).

(102b) and the O supplied to the R wave detection section (104)
The N amplifiers (to2a) and (102b) perform gain conversion of the signal input manually from the electrocardiogram signal amplifier (101).

Further, (103) is an A/D (analog/digital) converter, which converts the electrocardiogram No. 43 supplied from the buffer amplifier (102a) into digital data and sends it to the CPU (
107) and the magnetic tape recording section (1).

On the other hand, the R wave detection unit (104) detects the position of the R wave from the QR5 wave and sends the detection result to the path line B of the CPU (107).
supply to

The CPU (107) analyzes the electrocardiogram signal based on the detection result of the R wave detection section (104) and the digital data supplied from the A/D converter (103). Further, this CPU (107) performs a single part of each part of the device.

(108) is a storage unit, which includes a read-only memory (hereinafter referred to as ROM) in which an analysis program for electrocardiogram signals and a control program for the entire device are stored, and a buffer and RAM card to store intermediate results during signal analysis. (5) consists of a random access memory (hereinafter referred to as RAM) that is used as a buffer until the RAM card becomes full and a new RAM card is inserted.

(109) is a clock signal generation unit, which generates clock signal No. 13 for time control of the device mass and supplies it to the pass line B of the CPU (107), as well as clock signal No. 1 for writing to the cassette magnetic tape. is generated and supplied to the magnetic tape recording ff1(t).

Hto) is an operation key control section which generates an event signal or an interrupt signal 2b for system control by pressing the key operation section (8) and supplies it to the path line B of the CPU (107).

(411) is a control unit for the liquid crystal display, and the CP
Under the control of 111 of U (107), each line of messages is displayed on the liquid crystal display (6).

(105) is a digital signal generator, and CPU (105) is a digital signal generator.
The results analyzed in step 07) are supplied as digital signals to the human output control boat (106).

The human output control boat (106) supplies the above analysis results to the magnetic tape recording section (1).

(112) is a power supply unit which is composed of a battery and a stabilizing circuit, and generates power for the analog signal processing system, digital signal processing system, and magnetic tape recording unit drive system from the power supply provided by the battery, and supplies it to each system. .

Next, the electrocardiogram signal whose gain has been converted by the buffer amplifier (102b) in the magnetic tape recording section (1) is supplied to the tape recording control section (114) via the switch (113).

Also, the A/[) conversion &y of the real-time signal processing section (2)
The digital signal supplied from (103) is supplied to the tape recording control section (114) via a switch (113).

Similarly, the human output of the real-time signal processing unit (2); tIl
The analysis results supplied from the control port (106) are recorded on tape via the passenger car control port (115); l+II
It is supplied to the control section (external 4).

Further, the clock number 4+3 supplied from the clock signal generation unit (109) of the real-time number 13 processing unit (2) is transmitted to the clock number 4+4 call generation unit (109) via the switch (116).
17). When a clock signal is supplied from the real-time signal processing section (2), the clock signal generation section (117) supplies the clock signal to the tape recording control section (114). When no clock signal is supplied,
It generates a clock signal and records tape recording f + control unit (
114).

(118) is an operation key it'l control unit, which generates an event signal and an interrupt signal for system control by pressing the key operation unit (8) and sends it to the tape recorder 3j control unit (114).
supply to

Tape recording; outside the cylinder (114) is the head (119)
The data is written to the cassette magnetic tape (7) by -7.

In the above configuration, when the magnetic tape recording section (1) and real-time signal processing section (2) are used in a joined state, 4
Connect the No. 3 person's cable (13,) to the electrocardiogram input connector (11) of the real-time signal processing section (2). As a result, the electrocardiogram signal is supplied from the electrode (100) to the buffer amplifier (102a) and the R-wave detection section (104) of the real-time signal processing section (2). Buffer amplifier (
The electrocardiogram signal supplied to the buffer amplifier (102a) is gain-converted by the buffer amplifier (102a) and converted into a first-order A/
A/D converted by D conversion 3 (103) and sent to CPU
(107) is supplied to pass line B. In addition, the R wave detection section (104) detects the position of the R wave from the QRS wave,
The detection result is supplied to pass line B of the CPU (107).

Based on these data, the CPU (107) analyzes the electrocardiogram signal and records the analysis results in the RAM card (5).

On the other hand, the A/D converted electrocardiogram No.
13) to the tape recording control section (114) and recorded on the cassette magnetic tape (7).

In addition, if the RAM card (5) is not installed, the analysis result is sent from the digital signal generator (105) to the human output control port (106).

(115) to the tape recording control section (114) and recorded on the cassette magnetic tape (7).

Magnetic tape recording section (1) and real-time signal processing section (2)
) are operated independently, so even if one is not attached, it will not affect the operation of the other.

Furthermore, when the real-time signal processing section (2) is used independently, it is separated from the magnetic tape recording section (1). As a result, the analysis result of electrocardiogram IX is recorded in the RAM card (5) in the same way as in the case described above. In this case RAM
Since the card (5) can be used as part of the RAM of the CPU (107), analysis data can be multiplied quickly.

Furthermore, the RAM card (5) is credit card-sized, thin, and easy to handle, and is backed up by a lithium battery, so the data is retained for a long time even if the card is removed from the device.

Furthermore, when the magnetic tape recording section (1) is used independently, it must be connected to the real-time signal processing section (2). This switches the switches (113) and (116). The signalman Kacaple (13) is connected to the magnetic tape recording section (1).
) to the electrocardiogram input connector (11). As a result, the electrocardiogram signal is supplied from the electrode (100) to the buffer amplifier (102b) of the magnetic tape recording section (1).

The electrocardiogram No. 13 supplied to the buffer amplifier (102b) undergoes gain conversion by the buffer amplifier (102b), is supplied to the tape recording control section (114), and is recorded on the cassette magnetic tape (7). In this case, the electrocardiogram UA
The f3 signal is recorded as an analog signal.

[Effects of the Invention] As explained above, according to the present invention, there are two types of recording stages: magnetic tape and solid state recording stage,
In a portable long-term electrocardiogram information recording device that accumulates and analyzes electrocardiogram signals, the head electrocardiogram ∆ is recorded on the H magnetic tape.
and a real-time signal processing section that analyzes the electrocardiogram signal and records the analysis result in a solid-state memory, and the magnetic tape recording section and the real-time signal processing section (1) By combining the two parts, compared to the conventional system that only has the tape recording section or the conventional system that only has the upper part, Can provide a lot of accurate information.

(2) Compared to the conventional integrated system that incorporates a tape recording system and a semiconductor memory into one device, it is smaller and lighter when using only tape recording or a function in which only real-time processing effects are desired.

(3) - When used as a system, analysis results and anomaly extraction results are directly written to the removable memory of the real-time processing unit and can be saved, compared to the conventional system, so conventional processing is terminated. Subsequent operations for copying and recording onto tape become unnecessary. Furthermore, with playback/editing devices that have a removable memory reading function that has been developed separately, data can be read immediately as part of the microprocessor's memory, so results can be output immediately, unlike the traditional method of tape recording. Complicated and time-consuming operations such as data transfer through a line connection to a playback or editing device are no longer necessary.

(4): First output the information accumulated in the 4 demolding memory,
By referring to it, you can get an overview of the abnormality occurrence time, so you can search for the ECG signal at the necessary time from the tape and play it back, without having to output all the recorded ECG signals as in the conventional magnetic tape recording method. It is possible to output. This makes it possible to shorten the overall processing time and save paper for outputting results.

(5) Compared to conventional real-time methods, in this method, results can be obtained by the playback/editing device by simply moving the magnetic tape and removable memory, which is a storage medium that is small, lightweight, and easy to handle. , it becomes possible to acquire other data during that time, and the utilization efficiency of the device itself increases.

(6) In this method, when the number of analysis results and abnormality extraction results exceeds the predetermined memory capacity, even more information can be stored by simply attaching, detaching, and replacing the RAM card memory.

(7) Compared to the conventional system, this method does not require a means to write digital signals onto a magnetic tape;
Furthermore, since the film-deposited memory is card-shaped, it is small and thin, so the hardware configuration of the device can be reduced, resulting in a smaller device.

(8) With this method, most of the processing results! Since it is obtained from a stable storage medium called 14-body memory, it can be used repeatedly compared to magnetic tape recording methods, and since reproduction by magnetic tape can be kept to the necessary minimum, it is possible to achieve good reproduction of products 11. It is possible to obtain data.

[Brief explanation of drawings]

Figure 1 shows a portable long-term electrocardiogram+ according to an embodiment of the present invention.
? tIII recording device; FIG. 2 is a perspective view showing a state in which the magnetic tape recording section and the real-time signal processing section are separated; and FIG. 3 is a connecting portion between the magnetic tape recording section and the real-time signal processing section. FIG. 4 is a block diagram showing the electrical configuration of the above embodiment. (1): Tape recording section (2): Real-time signal processing section (3): Battery storage section (4): Magnetic tape recording mechanism section (5): RAM card (6): Liquid crystal display (7) Two cassettes Magnetic tape (8): Key operation section (9): Coupling mechanism (10): No. 3 connection section (11): Electrocardiogram manual connector (12): RAM card mounting section (13)? Signal cable with amplifier (100): ECG signal electrode for human power (101): ECG signal amplification section (102): Buffer amplifier (103): A/D converter (104): R wave detection section (105): Digital Signal generator (106), (115): input/output control board (107)
:CPU (108):Storage unit (109), (117):Clock signal generation unit (110)
), (118): Operation key control section (111): Liquid crystal display control section (112): Battery (113), (116): Switch (114): Tape recording control section (119): Head

Claims (1)

[Claims] A portable long-term electrocardiogram information recording device that has two types of recording means, a magnetic tape and a solid-state memory, and stores and analyzes electrocardiogram signals, a magnetic tape recording unit that records the electrocardiogram signals on the magnetic tape; and a real-time signal processing section that analyzes the electrocardiogram signal and records the analysis results in the solid-state memory, and the magnetic tape recording section and the real-time signal processing section can operate independently. A portable long-term electrocardiogram information recording device.