Surgery – Truss – Pad
Patent
1990-01-08
1991-07-23
Kamm, William E.
Surgery
Truss
Pad
A61B 50452
Patent
active
050334751
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a small, light, portable electrocardiographic recording analyzer which enables cardiac functions to be observed electrophysiologycally by means of an electrocardiogram, which alarms the user when an abnormality is detected, and which can be always carried by a patient having a potential abnormality in the cardiac or cerebral functions in order to detect the abnormality at an early stage.
BACKGROUND ART
As is well known, the percentage of tragic results caused by various troubles dangerous to life (e.g., heart stroke and cerebral hemorrhage) can be reduced if the occurrence of the relating abnormality is immediately detected to enable administration of first aid.
However, no means has been provided which enables a device for detecting this kind of abnormality to be put to widely practical use in complete systems. Ordinarily, electrocardiograms are used for the prediction of abnormalities or for searching for evidence of such.
In electrocardiogram tests, however, unlike abnormal waves always present such as those relating to organic degeneracy diseases (typically, arrhythmia and so on), abnormal waves temporarily generated (e.g., of myocardial infarction) cannot be detected unless they are accidentally generated during electrocardiogram recording.
For the purpose of compensating for this drawback, a portable electrocardiogram recorder is carried for a long time to detect in a magnetic tape record a fit wave which may be generated at an unpredictable time. This system is known as Halter electrocardiograph.
In the Halter electrocardiograph, however, a magnetic tape used for recording is played back afterward by a special reproduction analyzer in a medical institution to reproduce waveforms, and the existence and the number of abnormal waves and the forms of the waves are not made clear until the reproduction. The halter electrocardiograph is therefore useless in immediately taking measures to meet the situation at the time of the emergence of abnormal waves.
DISCLOSURE OF THE INVENTION
The inventor of the present invention has eagerly studied in consideration of the above-described problems of the conventional art to achieve the present invention.
The present invention provides a portable electrocardiographic recording analyzer, comprising: means for counting the sum total of the P, Q, R, S, T and U waves of electrocardiographic waveforms larger than a set reference voltages for a certain period of time; means for storing the preceding counted values: means for setting a reference value for the difference between the two sets of voltages signal means operating to issue an output when the difference between the value counted by said counting means and the value stored by said storing means is larger than a predetermined value: recording means for recording electrocardiographic waveforms for discontinuous periods of time which are set as desired; and means for storing an electrocardiographic waveform obtained when the signal means issues the output, along with an electrocardiographic waveform obtained at the preceding step.
The present invention has been achieved on the basis of the apparatus for measuring abnormal electrocardiographic signals disclosed in Japanese Patent Publication No. 56-22538 and includes an improvement on the same. That is, the measuring apparatus described in Japanese Patent Publication No. 56-22538 relates to an apparatus for measuring abnormal electrocardiographic signals for diagnosing the state of the subject in such a manner that the total sum of the number of waves larger than a set reference voltage exhibited for a certain period of time and the total sum of the number of waves in the next certain period of time are compared with each other. An output is obtained when the difference between these total sums reaches a certain reference value and is used for the diagnosis. An abnormality detection signal is supplied to an alarm device to effect alarming.
The electrocardiographic recording analyzer of the present invention is made by imp
REFERENCES:
patent: 3606882 (1971-09-01), Abe et al.
patent: 3799148 (1974-03-01), Rowen
patent: 3824990 (1974-07-01), Baule
patent: 3952731 (1976-04-01), Worstencroft
Ohara Youitsu
Takahashi Sadatsugu
Ueda Morikazu
Kamm William E.
Medical Instrument Japan Co., Ltd.
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