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    Method and apparatus for automatically screening variably recurrent waveforms such as an electrocaroiac signal
    1.
    发明授权
    Method and apparatus for automatically screening variably recurrent waveforms such as an electrocaroiac signal 失效
    用于自动筛选可变电流波形的方法和装置，如电磁信号

    公开(公告)号：US3577983A

    公开(公告)日：1971-05-11

    申请号：US3577983D

    申请日：1968-11-06

    Applicant: HUMETRICS CORP

    Inventor： BAESSLER LEE R

    IPC: A61B5/0452 ,  G01R23/00 ,  A61B5/04

    CPC classification number: A61B5/0452 ,  A61B5/7239 ,  G01R23/00

    Abstract: A method and apparatus including logic circuitry and interval detectors for selectively gating and evaluating subportions in individual cycles of a variably recurrent wave such as an electrocardiac signal. In distinction to attempting to subdivide such a variably recurrent signal in accordance with a running average rate, and in distinction to utilizing a measure of a preceding cycle time duration for setting desired gating periods to be applied in the immediately succeeding cycle for gating and measurement or evaluation, the present apparatus evaluates each subportion of the variably recurrent wave as a plurality of different subportions and displays one of the evaluations only after subsequent identification of the wave has been made relative to characteristically recurring points of inflection.

    Cerebral activity monitor
    3.
    发明授权
    Cerebral activity monitor 失效
    脑活动监测

    公开(公告)号：US3910258A

    公开(公告)日：1975-10-07

    申请号：US46212374

    申请日：1974-04-18

    Applicant: HUMETRICS CORP

    Inventor： PISARSKI LECH ,  VALIENSI ADELBERT W ,  BAESSLER LEE R ,  GLASSNER HARVEY F

    IPC: A61B5/0424 ,  A61B5/0476 ,  A61B5/04

    CPC classification number: A61B5/0424 ,  A61B5/0476

    Abstract: A brain wave signal monitor with a warning device actuated by failure of the signals to be present at a preselected minimal level for a specific period of time. The warning device is actuated by a circuit that remains locked in the actuating condition until reset by an attendant. A delay circuit controls the minimum rate by preventing actuation of the warning device until a predetermined time has elapsed since the last brain wave signal. A circuit tuned to the local power line frequency receives signals from electrodes on the patient and provides a second type of warning signal if an electrode becomes dislodged. A third signal circuit is actuated if the power supply voltage drops too low. The second and third warning signals are generated by selectively pulsing a calibration signal generator. The latter also supplies signals of known amplitude to the input circuit. An electrically controlled switching circuit can switch selected electrodes or the calibration signal to the input amplifier.

    Abstract translation: 具有警告装置的脑波信号监视器，该警告装置由信号故障以预定的最小电平存在一段特定的时间段。 警告装置由保持锁定在致动状态的电路致动，直到由服务员复位。 延迟电路通过防止警告装置的动作来控制最小速率，直到从最后的脑波信号起经过了预定的时间。 调谐到本地电力线频率的电路从患者的电极接收信号，并且如果电极被移开则提供第二类型的警告信号。 如果电源电压下降太低，则启动第三个信号电路。 通过选择性地脉冲校准信号发生器产生第二和第三警告信号。 后者还向输入电路提供已知幅度的信号。 电控开关电路可以将所选择的电极或校准信号切换到输入放大器。

    Method and apparatus for automatically screening of electrocardiac signals
    4.
    发明授权
    Method and apparatus for automatically screening of electrocardiac signals 失效
    电子信号自动识别的方法和装置

    公开(公告)号：US3554187A

    公开(公告)日：1971-01-12

    申请号：US3554187D

    申请日：1965-10-21

    Applicant: HUMETRICS CORP

    Inventor： GLASSNER HARVEY F ,  JORGENSEN CLINTON O ,  BAESSLER LEE R

    IPC: A61B5/04 ,  G06G7/60

    CPC classification number: A61B5/04012 ,  A61B5/7239 ,  G06G7/60

    Abstract: The method of evaluating electrocardiac signals comprising: DETECTING ELECTROCARDIAC SIGNALS COMPRISING CYCLES OF SUCCESSIVE FUNCTIONAL PERIODS VARIABLE IN BOTH RECURRENCY AND WAVE FORM CHARACTERISTICS, ONE OF SAID VARIABLE PERIODS INCLUDING A QRS wave train having at least one peak; DETERMINING S-wave duration; GENERATING A TRIGGERING SIGNAL RESPONSIVE TO THE SUBSTANTIALLY UNFILTERED DETECTED ELECTROCARDIAC SIGNAL IN SUBSTANTIAL UNIFORM TIME PHASE RELATION WITH THE R wave peak and after a delay of Swave duration; GENERATING GATING PULSES IN DEPENDENCY ON THE TRIGGERING SIGNAL, EACH OF THE GATING PULSES HAVING A DURATION AND TIME PHASE RANGE FOR SELECTING A PRESCRIBED FUNCTIONAL PERIOD OF THE DETECTED SIGNAL; ELECTRICALLY MEASURING THE DETECTED ELECTROCARDIAC SIGNAL DURING EACH GATING PULSE TO EVALUATE AT LEAST ONE PREDETERMINED CHARACTERISTIC OF THE RELATED FUNCTIONAL PERIOD; AND GENERATING A DISTINCTIVE OUTPUT SIGNAL WHEN SAID MEASUREMENT DEVIATES FROM LIMITS PRESCRIBED FOR EACH FUNCTIONAL PERIOD.

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