부산대학교 도서관

As a first step in research project for the development of a labor monitoring system, we have constructed a digital fetal heart monitor, which is able to demonstrate the instantaneous fetal heart rate per minute as a digital number at every fetal QRS pulse on the three nixie tubes and to take the analog record on an ink-writing oscillograph. The system we have developed can also analyse the fetal ECG wave forms on a storage oscilloscope and can monitor the heart rate by light and sound signals.As for the clinical applications of this monitor, characteristic patterns of the IHR variations of the fetuses who were complicated with circulation disturbance of the cord, fetal distress syndrome and marked tachycardia up-to 200 beats per minute are presented. Grounded upon the latest finding of the possibility of maternal ECG elimination in FECG by a unipolar leed system on the abdomen, and upon the identification of probable signs of oneset of crying of an asphixiated fetus in utero by the analysis of FECG informations further development of research and its clinical applications are anticipated.