Device for recording fetal heart rate with abdominal ELECTRODES

摘要

The utility model relates to medicine, namely to Perinatology, and can be used to obtain fetal heart activity signals. In order to improve the quality of the separation of mother and fetus signaling device for recording the fetal heart rate it comprises as a prototype, abdominal, and equalizing the reference electrodes, the multichannel low-noise differential amplifier, a multichannel analog-to-digital converter, a microcontroller unit for interfacing with a personal computer. Unlike the prototype device additionally introduced digital lowpass filter and a control unit. Introduction to the control block diagram, which gives an increased sampling frequency for analog-to-digital conversion, allows to increase the signal-to - noise ratio compared to a conventional analog-to-digital converter of the same bit depth, and a digital lowpass filter eliminates the interference, enables more qualitatively detect fetal heart rate. This device is much simpler due to the prototype using a smaller number of electrodes.