200 results about "Fetal heart rate" patented technology

A maternal-fetal monitoring system for use during all stages of pregnancy, including antepartum and intrapartum stages. The maternal-fetal monitoring system of the subject invention comprises (1) a set of sensors; (2) an amplifying/filtering means; (3) a computing means; and (4) a graphical user interface. Accurate clinical data, which can be extracted and provided to the user in real-time using the system of the invention, include without limitation, maternal electrocardiogram (ECG) signals, maternal uterine activity signals (EHG), maternal heart rate, fetal ECG signals, and fetal heart rate. In a preferred embodiment, the maternal-fetal monitoring system of the invention includes an intelligence means, such as a neural network system, to analyze and interpret clinical data for use in clinical diagnosis antepartum, intrapartum and postpartum, as well as delivery strategy.

Method and apparatus to non-invasively measure fetal blood oxygen saturation levels. Optical sensors capable of producing and detecting multiple wavelengths of tissue penetrating light are placed on the surface of the maternal abdomen, and the light beams directed to pass through at least a portion of the uterus containing the fetus. The fetal heart rate is monitored by Doppler ultrasound, and pure maternal optical signal related to maternal arterial blood flow are also measured. The optical sensors collect composite signals containing both maternal and fetal hemoglobin absorption spectral data and modulated by their respective pulsatile blood flows. The composite signals processed in the time domain and frequency domain, the pure maternal pulsatile optical signal used to extract the maternal contribution to the composite signal, and the fetal pulsatile signal is used to lock onto and extract the fetal contribution to the composite signal, and a fetal blood oxygen level deduced.

The invention relates to a method of monitoring a fetal heart rate, the method comprising: providing a first measurement head (104) and a second measurement head (106) and a sensor (200), the sensor (200) being comprised in the first measurement head (104) or the second measurement head (106), the sensor (200) being adapted to sense the maternal heart rate, the first measurement head (104) being adapted to sense maternal-fetal related medical data and the second measurement head (106) being adapted to sense the fetal heart rate, measuring the maternal heart rate by acquiring maternal heart rate data using the sensor (200), measuring the fetal heart rate by acquiring fetal heart rate data using the second measurement head (106), acquiring the maternal-fetal related medical data, detecting maternal-fetal heart rate coincidences by analyzing the maternal heart rate data and the fetal heart rate data.

An abdominal sonar includes an ultrasound transducer array with a plurality of ultrasound transducers. The abdominal sonar further includes at least one additional ultrasound transducer. A digital signal processor is communicatively connected to the plurality of ultrasound transducers and the at least one additional ultrasound transducer. The digital signal processor individually operates the plurality of ultrasound transducers and the at least one additional ultrasound transducer. The digital signal processor receives reflected ultrasound signals back from each of the plurality of ultrasound transducers and the at least one additional ultrasound transducer and converts the received reflected ultrasound signals into an audio signal. A system for monitoring a pregnancy includes an ultrasound transducer array and at least one additional ultrasound transducer. A digital signal processor is communicatively connected to the ultrasound transducer array and the at least one ultrasound transducer. The digital signal processor converts received raw fetal heart and uterine activity waveforms into an audio signal. A wireless transmitter broadcasts the received audio signal. A wireless receiver receives the broadcast audio signal. A patient monitor extracts the raw fetal heart and uterine activity waveforms from the audio signal and processes the waveforms to obtain an indication of fetal heart rate and an indication of uterine activity.

A fetal monitoring device includes a piezofilm sheet, a first electrode, and a second electrode. A controller is operably connected to the piezofilm sheet, first electrode, and second electrode and receives a biopotential and a piezofilm signal. The controller derives at least one of a maternal heart rate and a uterine activity for the biopotential and derives at least one of a fetal heart rate and fetal motion detection from the piezofilm signal. The controller derives an index of fetal health and operate an indicator to present the derived index of fetal health.

The invention provides a system and a method for real-time monitoring and communication of a housebound pregnant woman. A sensing device is used for sensing the uterine contractive pressure of the pregnant woman and physiological states, such as fetal heart rate, fetal movement, and the like of a fetus and generates a sensing signal; a computer-aided monitoring system carries out analytical processing and generates an analytical signal; a long-range electronic device downloads and displays the analytical signal from the computer-aided monitoring system, and the physiological states of the pregnant woman and the fetus can be judged to be abnormal or not through the analytical signal displayed by the electronic device, thus the physiological states of the pregnant woman can be monitored and known in a long range and real time, and the troubles of the pregnant woman staying in hospital for a long time for miscarriage prevention and other demands or going to the hospital back and forth frequently during pregnancy are reduced.

The invention discloses an algorithm for automatically recognizing a fetal heart rate baseline. The algorithm comprises the following steps: S1, collecting fetal heart rate signals; S2, performing curve optimization to the collected fetal heart rate signals; S3, performing feature extraction to the fetal heart rate signal curve after optimization, and clustering the extracted feature points into two feature parts through a clustering analysis algorithm; S4 distinguishing the two feature parts into a baseline part and a non-baseline part according to the distinguishing conditions; and S5, performing smooth filtering to the recognized baseline part to obtain the final estimated fetal heart rate baseline. The algorithm for automatically recognizing the fetal heart rate baseline can determine the fetal heart rate baseline more accurately by combining the fetal movement information particularly under the condition of close results of clustering, provide more intelligent and more reliable fetal heart monitoring results for clinic, and can be widely applied to the fields of biomedical signal processing, artificial intelligence and electronic fetal monitoring.

The invention relates to a system and method for measuring a heart rate of a fetus. The system for measuring the heart rate of the fetus comprises a maternal electrocardiosignal acquisition unit, a belly mixed signal acquisition unit, an electrocardiosignal processing unit and a fetus heart rate calculating unit, wherein the maternal electrocardiosignal acquisition unit is used for acquiring a maternal electrocardiosignal from a mother body, the belly mixed signal acquisition unit is used for acquiring a belly mixed signal which comprises the maternal electrocardiosignal and a fetus electrocardiosignal from the belly of the mother body, the electrocardiosignal processing unit is configured to receive the maternal electrocardiosignal from maternal electrocardiosignal acquisition unit and the belly mixed signal from the belly mixed signal acquisition unit, the electrocardiosignal processing unit identifies the position of an R wave of the maternal electrocardiosignal and determines a QRS wave band signal of the maternal electrocardiosignal based on the position of the R wave of the maternal electrocardiosignal, the electrocardiosignal processing unit removes the QRS wave band signal of the maternal electrocardiosignal from the belly mixed signal to obtain the fetus electrocardiosignal, and the fetus heart rate calculating unit is configured to identify the position of an R wave of the fetus electrocardiosignal, and calculates the heart rate of the fetus according to the time interval between two adjacent R waves of the fetus electrocardiosignal.

The invention provides a denoising method based on fetal heart rate detection and a fetal heart rate detector, which are suitable for field of signal denoising. The denoising method comprises the steps of A11 collecting a Doppler frequency shift signal of a fetus, and resolving a first frequency signal related to a fetal heart rate from the Doppler frequency shift signal; A12 collecting a human body physiological signal of a pregnant woman, and resolving a second frequency signal related to a heart rate of the pregnant woman from the human body physiological signal; A13 comparing the first frequency signal with the second frequency signal, thereby obtaining a comparison result; A14 filtering out the first frequency signal when the comparison result belongs to a preset range, and executing the step A11; A15 outputting the first frequency signal when the comparison result does not belong to the preset range. Therefore, compared with the prior art, the more accurate first frequency signal can be output, and the position of the fetus can be accurately determined.

A apparatus for automatically detecting a pregnancy status of a patient include a patch for adhering to human skin, a uterine contraction sensor, such as electromyography (EMG), coupled to the patch with at least two electrodes, and an inertial sensor for sensing fetal movement, or fetal heart rate (FHR) sensor, such as fetal EKG or a Doppler ultrasound. An electronic circuit is coupled to the patch, the EMG sensor and the inertial sensor, and/or FHR sensor. The circuit provides an output based on a uterine contraction signal from the EMG sensor (or the Doppler ultrasound) correlated in time to a fetal movement, and/or fetal heart rate. The apparatus may include a thermometer to aid in automatically providing an indication of a pregnancy complication or ovulation status of the patient, based on the output.

The invention relates to an interactive method for rapidly and automatically extracting fetus electrocardio. The interactive method includes the steps that electrocardio signals at the abdomen of a parent body are preprocessed, and power frequency interference and high-frequency noise interference which are relatively easy to filter are removed; smooth and steady wavelet time-frequency transformation is carried out on the preprocessed electrocardio signals at the abdomen of the parent body; feature extraction is carried out on wavelet detail coefficients; features related to contents of the electrocardio signals at the abdomen of the parent body are detected, and a parent body electrocardio template is constructed; and the constructed parent body electrocardio template is removed from the preprocessed electrocardio signals at the abdomen of the parent body so as to obtain fetus electrocardio signals. According to the interactive method for rapidly and automatically extracting the fetus electrocardio, the smooth and steady wavelet time-invariant feature is adopted; the position of parent body electrocardio and the position of the fetus electrocardio can be accurately positioned; the extracted fetus electrocardio data have the high accuracy rate when being used for fetus heart rate detection; in addition, according to an interactive feature automatic detection method, in cooperation with the construction of the parent body electrocardio template, needed circulation is less, the calculating speed is high, and the interactive method can meet the real-time processing requirement and can be suitable for extracting the fetus electrocardio from the electrocardio in the abdomens of different pregnant women.

The invention discloses a wearable vital sign monitor. The wearable vital sign monitor comprises a wearable main body and a tensile sensing module, a film pulsation sensing module, a microprocessor, a button module and a display module which are arranged on the wearable main body, wherein the microprocessor is respectively in electric connection with the tensile sensing module, the film pulsation sensing module, the button module and the display module; the tensile sensing module is used for detecting a pressure signal between the wearable main body and a pregnant woman and converting the pressure signal into a digital signal which can be processed by the microprocessor; the film pulsation sensing module is used for detecting the fetal heart rate, the fetal movement rate and the fetal movement strength of a fetus and respectively converting the fetal heart rate, the fetal movement rate and the fetal movement strength into digital signals which can be processed by the microprocessor. The invention further discloses a monitoring method. According to the invention, the vital sign information of the fetus can be safely and comprehensively detected.

The invention provides a time-domain sparsity linear aliasing blind separation model discrimination method in fetal electrocardiogram detection, which mainly comprises the following steps: acquiring multiple mother/fetal electrocardiogram aliasing mixed signals from a mother belly; obtaining the position of mother electrocardiogram R wave and the mother electrocardiogram PQRS (Physician Quality Reporting System) wave range from the mixed source signals by using a threshold limitation method; obtaining the position of fetal electrocardiogram R wave and fetal electrocardiogram PQRS wave range by using threshold limitation and wave width limitation methods; judging aliasing between the mother electrocardiogram PQRS wave range and the fetal electrocardiogram PQRS wave range, thereby finding out the time period without aliasing and obtaining the electrocardiogram mixed signal sparse region; and measuring the aliasing linearity in the sparse region by calculating the correlation of the two acquired signals. The method has the advantage of simple structure, is easy to implement, and solves the problem of discrimination of the linear aliasing blind separation model based on source signal time-domain relative sparsity.

The invention discloses fetal heart monitoring equipment. The fetal heart monitoring equipment comprises a first communication interface, a data storage unit, a displayer and a data processor, wherein the first communication interface is suitable for being in communication with a fetal heart detector in a first communication mode; the data storage unit is suitable for storing fetal heart data information; the displayer is suitable for displaying the fetal heart data information; the data processor is suitable for receiving a fetal heart data package from the fetal heart detector through the first communication interface, and the fetal heart data information in the fetal heart data package is extracted, stored in the data storage unit and displayed on the displayer. The fetal heart data information comprises fetal heart rate data comprising a fetal heart rate, a self-correlation peak value and/or a peak value compared result, the data processor is used for displaying a heart rate value curve on the displayer according to the fetal heart rate, guide identification is displayed on the displayer according to the self-correlation peak value and/or the peak value compared result, and a user is conveniently guided to move the fetal heart detector. The invention further discloses a fetal heart monitoring system comprising the fetal heart monitoring equipment and a corresponding fetal heart monitoring method.

At present, many researches for using other techniques such as adaptive filtering, singular value decomposition, principal component analysis, a neural network algorithm, ICA, and non-negative blind separation to extract fetal electrocardiosignal (FECG) are reported, but the extraction methods of these techniques suffer a lot of confinements, or are too complex, or need more manual intervention, or are bad in final separation effect. The objective of the invention is to overcome the defects of the conventional FECG extraction methods and provide a hilbert transform based FECG extraction and instant heart rate recognition method which can rapidly and easily acquire FECG and calculate out the fetal instant heart rate by using ECG of a mother abdomen acquired from a FECG database, and can beeasily applied to clinic fetal monitoring.