246 results about "Fetal heart" patented technology

The invention provides an integrated patch for the non-invasive monitoring of a laboring woman. The patch incorporates biopotential electrodes for sensing fetal ECG and EMG indicative of myometrial activity. The patch also incorporates a processor for extracting labor activity and fetal heart activity after filtering out maternal ECG from the composite biopotential signal present on the abdomen of the pregnant woman. The fetal monitor patch is thin, flexible, and incorporates a battery and biopotential amplifier network. In the preferred embodiment, the patch is disposable and worn continuously during labor or later stages of pregnancy. In a hospital embodiment for intrapartum monitoring, the patch wirelessly transmits fetal heart activity and myometrial activity to a bedside monitor or a remote monitoring station.

A continuous, non-invasive fetal heart rate measurement is produced using one or more ultrasonic transducer array patches that are adhered or attached to the mother. Each ultrasound transducer array is operated in an autonomous mode by a digital signal processor to obtain data from which fetal heart rate information can be derived. Each ultrasonic transducer array patch comprises a multiplicity of subelements that are switchably reconfigurable to form elements having different shapes, e.g., annular rings. Each subelement comprises a plurality of interconnected cMUT cells that are not switchably disconnectable. The use of cMUT patches will provide the ability to interrogate a three-dimensional space electronically (i.e. without mechanical beam steering) with ultrasound, using a transducer device that is thin and lightweight enough to stick to the patient's skin like an EKG electrode. The ultrasound device can track the fetal heart in three-dimensional space as it moves due to the mother's motion or the motion of the unborn child within the womb.

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 method and apparatus for monitoring the condition of a fetus to assess a degree of risk of developing a permanent neurological condition is provided. A signal indicative of a fetal heart is processed to derive a degree of risk of developing a permanent neurological condition. The data indicative of the degree of risk of developing a permanent neurological condition indicates a likelihood that the condition of the fetus belongs to a class in a group of classes, where each class in the group of classes is associated with a pre-defined fetal condition. Data indicative of the degree of risk of developing a permanent neurological condition is then released. In one example, a neural network is used to obtain data indicating the likelihood that the condition of the fetus belongs to a class in the group of classes.

Apparatus for monitoring a fetal heart-beat is able to extract one or more fetal electrocardiograms (fECGs) from a composite signal detected at the abdomen of a pregnant woman. The apparatus includes specific low-noise components: a plurality of low-noise electrodes (1-3, R) for placement on the abdomen during pregnancy and a low-noise signal recording and processing means (34). Screened leads are also used, as required. Signals indicative of voltages developed between each abdominal electrode (1-3) and a reference electrode (R) are recorded in a plurality of signal channels. Data within each channel is digitised and processed in order to generate a plurality of separated source signals, at least one of which relates to the fECG of a single fetus. Single-channel fECGs may be reconstructed using the source signals identified as belonging to the same fetus.

An ultrasound diagnosis apparatus which performs ultrasonic diagnosis with respect of a fetal heart. An area change measurement section calculates an area of a specific heart chamber (left ventricle) in the fetal heart in frame units. Further, the area change measurement section generates a graph representing the area which is calculated in frame units. The maximum value and the minimum value are specified in the graph to thereby specify end-diastole and end-systole. Based on this information, a heart rate and a cardiac cycle with regard to the fetal heart are calculated. Further, an ejection fraction is also calculated from an end-diastolic area and an end-systolic area.

The invention relates to the field of biomedical signal processing, in particular to a signal detection method and device based on multi-chip ultrasonic sensors. The method comprises the following steps: dividing the multi-chip ultrasonic sensors into M groups according to the preset standard; carrying out fetal heart signal acquisition in preset duration; obtaining the signal quality parameter of each chip group according to the acquired fetal heart signal; obtaining the chip group with the best signal quality through comparison; carrying out fetal heart signal acquisition and output on the chip group and stopping acquisition of other chip groups; detecting whether the signal quality parameter of the chip group is less than the preset threshold every preset duration, if so, repeating theabove steps, and if no, continuing fetal heart signal acquisition and output. The method and the device have the following beneficial effects: the burdens of the medical workers are lightened; more accurate intermediate processing data are obtained; meanwhile, the sound field combined by the chips is uniform; and only a group of chips work in a combined manner in the normal custody process, thus neither increasing power consumption nor increasing ultrasonic output quantity.

The invention discloses a method for calculating a non-baseline part of a fetal heart rate curve. The method is characterized in that a non-baseline section is characterized in that the maximum offset between the fetal heart rate value and a base value of the non-baseline section is not less than Dmin, and the duration time is not shorter than Tmin and not longer than Tmax; a suspected non-baseline section is characterized in that the maximum offset between the fetal heart rate value and a base value of the suspected non-baseline section is not less than Dmin, and the duration time is longer than Tmax; for the suspected non-baseline section, the base value bmp of the suspected non-baseline section is adjusted each time, so that the duration time of the suspected non-baseline section is shortened, and then whether the suspected non-baseline section meets the characteristics of the non-baseline section is judged again. According to the methods for calculating the non-baseline part and a baseline of the fetal heart rate curve, the fetal heart rate curve baseline can be accurately recognized especially for the fetal heart rate curve in which acceleration and deceleration frequently occur, and the problem that the baseline can not be accurately estimated through an algorithm based on a numerical treatment method is solved. Meanwhile, the method is high in calculation efficiency, and solves the problem that an algorithm based on an artificial intelligence method is low in efficiency.

A biomagnetic field measuring apparatus for performing (1) processes for removing a magnetic field waveform generated by a maternal heart from a waveform of a biomagnetic field measured, (2) processes for obtaining a template waveform of a magnetic field waveform generated by the fetal heart from a waveform, from which the magnetic field waveform generated by the maternal heart has been removed, (3) processes for obtaining a waveform of a cross correlation coefficient between the waveform, from which the magnetic field waveform generated by the mother's hears was removed, and the template waveform, and (4) a process for detecting peaks from a waveform of the cross correlation coefficient, and displaying times of appearance of the detected peaks on a display unit.

The invention relates to a fetal heart rate detection method based on a PC, which comprises the following steps: a fetal heart probe is connected to the PC; an excitation circuit generates a signal, and the signal is transmitted to the belly of a pregnant woman by the transmitting end of an ultrasonic transducer, and then input to an analog multiplier as a carrier; the receiving end of the ultrasonic transducer receives reflected waves, converts the reflected waves into an electric signal and inputs the electric signal to the analog multiplier; the analog multiplier demodulates the signal, the output differential electric signal is processed by an amplifying circuit and a filter circuit, and a singlechip carries out AD sampling; the PC sends out an acquisition start command, and the singlechip transmits the processed signal to the PC; and the fetal heart probe resets after stopping acquisition. The invention adopts an integrated fetal heart probe and solves the problem of on-line working between the fetal cardiotachometer and the PC. The invention can record, store, display and print the fetal heart rate in real time, and can also have the functions of automatic alarming and forgery prevention.

The invention discloses a digital pulsed ultrasound transmitting device for a fetal monitor, relating to the field of medical equipment. The digital pulsed ultrasound transmitting device comprises an ultrasound probe and an ultrasound transmitting circuit which are connected with each other, wherein the ultrasound probe employs a plurality of wafers which integrates transmission and reception functions into a whole and has the transmitting frequency of 1.0 MHz, the wafers are arranged on the radiation surface of the probe uniformly. The digital pulsed ultrasound transmitting device has wide ultrasound transmission acoustic beams, and is hardly affected by fetal movement and uterine contraction during detection upon a fetal heart signal in a monitoring process, so that the monitoring result is more accurate and reliable; the transmitting circuit generates a transmission electric excitation square wave signal of 1.0 MHz by using a CPLD (Complex Programmable Logic Device) digital circuit, the transmission electric excitation square wave signal is coupled to the ultrasonic probe by a resonant amplification circuit so as to generate an ultrasonic wave of 1.0 MHz; and the digital pulsed ultrasound transmitting device is low in transmission frequency, less in attenuation in an ultrasound propagation process, strong in reflection echo, high in flexibility, low in noise, strong in anti-interference ability, and steady and reliable in performance.

The invention relates to a method and a device for improving the accuracy of Doppler fetal heart rate data. The method comprises steps of respectively performing hardware zero-crossing checking processing and self-correlation processing on preprocessed fetal heart Doppler envelope signals so as to obtain a first fetal heart rate and a second fetal heart rate; updating a corrected heart rate zone with the most second fetal heart rate occurrence probability through the first fetal heart rate; enabling a measured interval to be more accurate through updating the corrected heart rate zone with the most second fetal heart rate occurrence probability so as to obtain the more accurate and higher-statistic probability corrected heart rate zone with the most second fetal heart rate occurrence probability; and furthermore, obtaining the more accurate human body heart rate value. By utilizing the method, the monitoring intermediate data is adjusted and corrected so as to improve the detection accuracy, less hardware resources are needed, and the method is low in cost and easy to implement.

The invention discloses a fetal heart audio signal processing device and fetal monitoring equipment. The fetal heart audio signal processing device comprises a fetal heart audio signal detection front end, a frequency shift input end, a frequency shift processing module and a frequency shift output end, wherein the fetal heart audio signal detection front end is used for generating ultrasonic beams and acquiring fetal heart audio signals based on the ultrasonic beams; the frequency shift input end is coupled with the output end of the fetal heart audio signal detection front end; the frequency shift processing module is coupled with the frequency shift input end; the frequency shift output end is coupled with the frequency shift processing module; the frequency shift processing module is used for carrying out frequency shift processing on the fetal heart audio signals, input via the frequency shift input end, of the fetal heart audio signal detection front end; the fetal heart audio signals subjected to frequency shift processing are output via the frequency shift output end. The device and the equipment, which are provided by the invention, can achieve the effects of improving the playing effects of the fetal heart audio signals in audio playing equipment and improving the possibility of extensive use of fetal monitoring.