| 摘要 |
A method of monitoring a brain wave response of a fetus in utero, comprises the steps of removably connecting an auditory transducer at least one biosensor electrode to a mother's abdomen to detect brain wave activity in a fetus therein and pulsing the transducer with one of rectangular waves and tone pips of a selected frequency to emit pulsed audible sounds at predetermined times in combination with the steps of detecting, for each pulsed audible sound, a series of voltage oscillations corresponding to brain stem auditory evoked responses (BAER) of the fetus which are time-locked to the corresponding audible sound and converting the BAER analog output to BAER digital data. A Fetal Brain Monitor for monitoring a brain wave response of a fetus in utero, comprises an auditory transducer producing pulsed audible sounds and adapted to be placed on an abdomen of a mother of the fetus and at least one biosensor electrode adapted to be placed on the mother's abdomen for detecting electrical activity of a brain of the fetus in combination with a pulsing arrangement pulsing the transducer with one of rectangular waves and tone pips of a selected frequency so that it emits pulsed audible sounds at predetermined times and an amplifier connected to the at least one biosensor electrode to amplify brain stem auditory responses (BAER) of the fetus detected by the at least one biosensor electrode which are time-locked to the sounds. An analog/digital converter converts the analog BAER data to BAER digital data, a computer-based QEEG (Quantitative EEG) system improves a signal to noise ratio of the BAER digital data using an adaptive optimum filtering algorithm and analyzes the BAER digital data relative to a reference database.
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