JP2015229046A - Electrocardiographic information acquisition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrocardiographic information acquisition device that is stuck to the breast or a belt and configured not to generate an alarm signal, when it is not worn.SOLUTION: The electrocardiographic information acquisition device is fixed to the breast by a fitting belt or by adhesion and generates an alarm signal when there is an electrocardiographic abnormality. When a noise interval calculated by removing the number of noises, or an amount of a peak value of noise generated between a peak value (R wave) that exceeds a first threshold of an electrocardiographic waveform, and a next peak value (R wave) exceeding a prescribed second threshold, is smaller than a prescribed value, the electrocardiographic information acquisition device determines it as noise and executes such control as to prevent the emission of the alarm signal.

Description

  The present invention relates to an electrocardiogram information acquisition apparatus that acquires electrocardiogram information of a subject.

  Patent Document 1 is known as an apparatus for measuring electrocardiographic information filed by the present applicant as an apparatus for acquiring electrocardiographic information of a subject for a long time, for example, 24 hours, on the human body. Patent Document 1 is a mode in which a subject's electrocardiogram is measured and recorded for a long time, and when a subject or doctor recognizes an abnormality in the electrocardiogram, a switch called an event switch is pressed and pressed. The electrocardiogram is recorded about a predetermined time from the time.

  Patent Document 2 is a health management support device that stores electrocardiographic data before and after when the health management data determination unit determines that there is an abnormality, and notifies that fact when it is determined to be abnormal.

JP 2012-45195 A JP 2004-148056 A

  In Patent Document 1 described above, the electrocardiogram of the subject is recorded for a long time, but when the electrocardiogram is felt abnormal, the subject or doctor presses a switch called an event switch to record the electrocardiogram before and after the press. However, if the event switch is not pressed, a memory for storing for a long time is required to record the electrocardiogram.

  In Patent Document 2, an electrocardiogram is notified when an abnormality occurs, but the electrocardiogram is measured when the electrocardiogram information acquisition device is attached to the chest. That is, when an electrocardiogram abnormality determination is detected, electrocardiograms for a predetermined time before and after that are automatically recorded. In Patent Document 2, when the electrocardiogram information acquisition device is removed from the chest, there is a possibility that the same notification as the electrocardiogram abnormality may be made in the same manner when the noise is a signal similar to the electrocardiogram abnormality from the outside. The point is not considered. Each time a doctor rushes to make a diagnosis. Also, when removing the electrocardiogram information acquisition device from the chest, it is conceivable to disconnect the power switch by providing a power switch. In the case of a signal similar to an electrocardiographic abnormality as described above, there is a possibility that the same notification as the electrocardiographic abnormality is given. In addition, since no power switch is required, the cost is reduced. In addition, there is a method of storing a large number of noise patterns and determining that the noise is matched with the pattern, but this method also leads to an increase in cost.

  The present invention is intended to solve the problem of such a conventional configuration, and when the electrocardiogram information acquisition device is removed from the subject, it is not determined to be an electrocardiogram abnormality without cost. The object is to prevent the occurrence of an electrocardiogram abnormal signal by determining it as noise.

  According to a first aspect of the present invention, there is provided an electrode portion including at least a pair of electrodes, a signal waveform detection portion for detecting an electrocardiogram waveform and noise based on a potential generated between the at least a pair of electrodes, and a wearing belt or affixing Is an electrocardiogram information acquisition device that is fixed to the chest and generates a warning signal when an electrocardiogram is abnormal, and includes a peak value (R wave) exceeding the first threshold value and the next peak value (R wave) of the electrocardiogram waveform. When the noise interval calculated by dividing the number of noises whose noise peak value exceeds a predetermined second threshold is smaller than the predetermined value, control is performed so that the warning signal is not generated. An electrocardiogram information acquisition apparatus is provided.

  According to a second aspect of the present invention, there is provided the electrocardiogram information acquiring apparatus according to the first aspect, wherein when the main noise exceeds the predetermined value, the user is notified by controlling a notification unit.

  As described above, the electrocardiogram information acquisition apparatus of the present invention does not have the same situation as an electrocardiogram abnormality when removed from the body. In addition, since no power switch is provided, the power switch is not forgotten and the cost can be reduced.

Conceptual diagram of an electrocardiograph system 1 channel ECG measurement mode that outputs 1 channel, eg CC5 lead data 2 channel ECG measurement mode that outputs 2 channel lead data, for example, outputs CC5 and CM5 lead data Basic example of an electrocardiogram that detects the subject's electrocardiogram Flowchart showing the operation of the computer that controls the operation of the electrocardiogram information acquisition device Diagram showing the relationship between ECG waveform and noise

  FIG. 1 shows a conceptual diagram of an electrocardiograph system of the present invention.

  Reference numeral 1 denotes an electrocardiograph, 2 denotes a computer, and the electrocardiograph 1 and the computer 2 include a communication unit indicated by 1C and a communication adapter indicated by 2C so that bidirectional communication can be performed.

  Reference numeral 3 denotes a belt for fixing the electrocardiograph 1 with a fixing member (not shown), has holes 3L and 3R, is attached with a back rubber belt (not shown), and is wound around the chest of the subject. Can be fixed.

  Reference numeral 4L denotes a left chest electrode, and 4R1 and 4R2 denote right chest electrodes, which are in contact with the chest of the subject and output an electrocardiogram signal.

  5R, 5G, and 5Y indicate red LED, green LED, and yellow LED, respectively, and indicate the operating state.

  Reference numeral 6 denotes an event switch. When the event switch 6 is pressed and turned on, the electrocardiogram waveforms before and after the event switch 6 are recorded.

  Reference numeral 7 denotes a memory card that records diagnosis subject information such as the name of the diagnosis subject and an electrocardiographic waveform.

  Reference numeral 8 denotes a connection terminal for connecting the induction cord.

  Reference numeral 9 denotes a vibration motor. If a recording start signal is output but no recording is made on the memory card, the vibration motor 9 is driven to transmit the vibration to the person to be diagnosed.

  Reference numeral 10 denotes a display of the computer 2, and 11 denotes a keyboard for inputting diagnosis subject information such as the name of the diagnosis subject on the computer 2.

  FIG. 2 shows a one-channel electrocardiographic measurement mode that outputs one channel, for example CC5 lead data.

  H indicates a 1-channel electrocardiogram measurement mode in which a belt 3 with the electrocardiograph 1 is wound around the chest and the CC5 lead data is measured, for example.

  FIG. 3 shows a two-channel electrocardiographic measurement mode for outputting two channels, for example, two-channel lead data for outputting CC5 and CM5 lead data.

  A belt 3 with the electrocardiograph 1 attached to the subject H is wound around the chest and one end is connected to the two-channel connection terminal 8. A two-channel electrocardiogram measurement mode in which CC5 and CM5 lead data is output by pasting on the upper part is shown.

  FIG. 4 shows a basic example of an electrocardiogram waveform in which the subject's electrocardiogram is detected.

  Among the electrocardiogram portions indicated by P, Q, R, S, and T, the R wave generated when pumping blood from the left ventricle to the aorta and the RR interval that is the next R wave are taken up.

  FIG. 5 is a flowchart showing the operation of the computer that controls the operation of the electrocardiogram information acquisition apparatus of the present invention.

  First, an R wave is detected at S1, a threshold of the R wave as a reference for the detection is set at S2, and an interval between the R wave exceeding the threshold and the next R wave exceeding the threshold at S3, R− R time is detected.

  In S4, a noise threshold is set in the same manner as in the R wave, and in S5, the number of noises exceeding the noise threshold is counted between RR.

  In S6, the noise interval D is obtained by dividing the RR time by the number of noises.

  In S7, it is determined whether or not the noise interval D is larger than the reference D0. If the noise interval D is not larger than D0, it is determined that there is noise, and an auto trigger function for automatically recording an electrocardiogram is prevented. In S8, the process proceeds to the next step, and the operation of the jido trigger function becomes possible.

  FIG. 6 is a diagram showing the relationship between the electrocardiogram waveform and noise, and shows an example in which the electrocardiogram waveform is sampled at a sampling interval of 8 mmsec in order to operate for a long time and power saving, for example, 24 hours. Here, an electrocardiogram waveform when noise is mixed is shown.

  For R wave detection, an R wave upper limit threshold and an R wave lower limit threshold are set, and similarly, a noise upper limit threshold and a noise lower limit threshold for noise detection are set.

  The R wave exceeds the R wave upper limit threshold and the R wave below the R wave lower limit threshold is recognized as one R wave, and the noise is counted up when the noise exceeds the noise upper limit threshold and falls below the noise lower limit threshold.

  When two R waves are detected, the time between the R wave and the R wave is calculated, and how many noises are generated within this RR time. The counter value is shown.

  The average noise time interval is calculated by dividing the RR time by the noise counter value. In FIG. 5, since the RR time is 240 msec and the counter value is 7, 240 msec is divided by 7, so that 34.28 msec is obtained. Here, if the noise interval time is 1601 msec or less, it is processed as noise in advance.

  As an embodiment of the present invention, the electrocardiograph 1 as shown in FIG. 1 has been described in the form of a belt for fixing with an unillustrated fixing member, but the figure of Japanese Patent Application Laid-Open No. 2012-45195 filed by the present applicant. Instead of using a belt as shown in FIG. 9, the electrocardiograph measuring unit may be affixed to the subject to be measured.

1 ... Electrocardiograph 2 ... Computer 2C ... Communication adapter 3.・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Belt 4L ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Left chest electrode 4R1, 4R2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Right chest electrode 5R, 5G, 5Y ・ ・ ・ ・..LED
6 ... event switch 7 ... memory card 8 ... 2 channel connection Terminal 9 ... vibrating motor 10 ... display 11 ... key 12 ...・ ・ ・ ・ ・ ・ ・ ・ Induction code 13 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Disposable electrode

Claims (2)

  An electrode part having at least a pair of electrodes, a signal waveform detection part for detecting an electrocardiogram waveform and noise based on a potential generated between the at least a pair of electrodes, and a wearing belt or affixed to the chest by pasting An electrocardiogram information acquisition device for generating a warning signal when an electrocardiogram is abnormal, between a peak value (R wave) exceeding the first threshold value of the electrocardiogram waveform and a next peak value (R wave). An electrocardiographic information acquisition device for controlling so as not to generate the warning signal when the noise interval calculated by dividing the number of noises whose generated noise peak value exceeds a predetermined second threshold is smaller than a predetermined value .   The electrocardiogram information acquisition apparatus according to claim 1, wherein when the main noise exceeds the predetermined value, a notification unit is controlled to notify the user of the fact.