Abstract
Abstract Aims: To clarify past history of medical electronics to further promote the studies on medical engineering. Methods: The hand-made medical electronic devices in obstetrics and gynecology were described with their circuits in vacuum tube age, transistor age, integrated circuit (IC) and large scale integration (LSI) ages then customized computer age have been experienced. Results: EEGs were studied to clarify abnormal brain function of eclampsia. The ECG deteccted abnormal cardiac function before gynecologic operations. Fetal diagnosis shifted to fetal heart rate monitoring because of insufficient detection of fetal distress by fetal electro-and phonocardiograms. Simultaneous Doppler fetal movement records and fetal heart rate highly clarified the pathologic process of asphyxia by using actocardiogram. Maternal, fetal and neonatal medicine was highly improved by the electronics devices in every progress stage. Conclusion and recommendation: The physicians and researchers must ask the supply of necessary complicated devices instead of their hand-making at present.
Highlights
This report will be a funny story, where medical electronic devices were hand-made by a young medical doctor around 1950 in Japan immediately after the Second World War, in the young Doctoral Course researcher, 24 years old K Maeda, in Kyushu University, Faculty of Medicine, who selected his doctoral thesis to study the electroencephalogram (EEG) of convulsive eclampsia disease, which was an important heavy disease in Obstetrics department [1], despite there was no commercial EEG machine in Japan, nor the possibility to import it from foreign country due to the poverty of Japan after the war, the EEG machine must be produced by the researcher himself
The EEG amplifier was composed of vacuum tubes, which were selected in the guide book on the character of vacuum tubes: they were 6F5-6SL7-6SL7-6SN7-6V6 in the construction of EEG amplifier inserting 60 Hz removing filter to prevent AC hazard
Amplifier action was checked by a magic eye tube, which twincled by the 10 Hz alfa EEG waves, which was the tuning monitor in the radio, utilized instead of oscilloscope
Summary
EEGs were studied to clarify abnormal brain function of eclampsia. The ECG deteccted abnormal cardiac function before gynecologic operations. Fetal diagnosis shifted to fetal heart rate monitoring because of insufficient detection of fetal distress by fetal electro-and phonocardiograms. Simultaneous Doppler fetal movement records and fetal heart rate highly clarified the pathologic process of asphyxia by using actocardiogram. Fetal and neonatal medicine was highly improved by the electronics devices in every progress stage
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
