I would like to have the papers for fetal heart rate monitoring with complete circuit diagram.

ieee paper on fetal heart rate monitoring system free download

The fetal heart rate is vital for monitoring fetal well-being. Fetal heart rate monitoring based on acoustic techniques is passive and noninvasive. In this work, a fetal heart rate monitoring system based on phonocardiographic method is proposed. A portable low-power stethoscope is customized which meets the need for sensitivity in the monitoring. A noise cancellation method and adaptive matching method are applied to extract the fetal heart rate effectively. Clinical trials are carried out on pregnant women, and the comparison of fetal heart rates given by the proposed system with those given by the Doppler monitor is given to show the accuracy.It has been shown that the rate of preterm birth in remote and rural populations in Australia is more than twice of those in the metropolitan population, and that increased access to quality antenatal care in such communities leads to a significant improvement. This paper describes a system that supports remote fetal heart rate monitoring, thus providing a technique that addresses this need for better remote antenatal care. The application involves a smart phone, a portable Doppler ultrasound device, a remote back-end server and network connectivity provided by the global system for mobile communications (GSM) and general packet radio service (GPRS) networks. Algorithms for fetal heart rate detection were adapted to cater for the lower processing powers on the smart phone. The accuracy of this detection algorithm in the mobile application was evaluated and found to be highly comparable to that of a MATLAB implementation on a PC.In this paper we present a portable PDA-based fetal heart monitor that is able to provide instantaneous fetal heart rate (FHR) for the pregnant women. Several signal processing techniques are implemented in our device to make it clear, reliable and ease-to-use. Firstly the spectral subtraction method is used to remove the stationary background noise and the amplitude modulation technique is then employed to make the fetal heart sound more audible. A real time algorithm is proposed to extract the FHR information from the weak and noisy signals. Based on the signal spectrum distribution, a confidence factor (CF) is designed to forecast the reliability of the calculated FHR. CF can also be used to guide the user in locating the optimum auscultation position. Our device has been tested in a local hospital on a sample group of 41 pregnant women. It has been shown that an approximate 75% of the pregnant mothers are able to hear their babies' heart sound clearly by using our device. Tests are also carried out to compare our resulted FHR with the cardiotocography (CTG) records

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