Introduction To Doppler Fetal Heart Rate Monitor

The ultrasound Doppler fetal heart rate meter adopts the principle of ultrasound non-focused continuous wave Doppler. It is composed of an ultrasound transducer and a circuit part that are acoustically coupled with the mother's abdomen. It can monitor and record fetal heart rate and maternal uterine contractions. It is mainly used for Monitoring of the fetus during late pregnancy, prenatal and intrapartum periods. It is a strong inspection project. During calibration, the ultrasonic beam generated by the ultrasonic transducer is directly aimed at the fetus. Part of the incident sound beam hits the moving surface of the fetal heart. Due to the Doppler effect, the frequency of the ultrasonic wave shifts, which is detected by the receiving transducer and processed by the signal. The low-frequency signals related to fetal heart rate can be separated and amplified for fetal heart rate detection. Ultrasonic Doppler fetal heart rate monitor is recognized as the most accurate and widely used fetal heart rate monitoring method and instrument in the industry. It can be divided into medical Doppler fetal heart rate monitors used in maternal and child health hospitals and medical systems and home Doppler fetal heart rate monitors used by ordinary pregnant women.