96 results about "Electrocardiograph lead" patented technology

Apparatus for assessing the electrical properties of patient-electrode interfaces has a carrier signal source injecting two carrier signals comprising an AC signal with a DC offset to the electrodes. The carrier signals are out of phase. The outputs from the electrodes are formed into electrocardiographic lead signals in a pre-amplifier circuit. Signal processing circuit is coupled to the pre-amplifier circuit and provides a first signal comprising the AC carrier signal contained in an ECG lead signal and a second signal containing a DC offset signal. The first and second signals are provided to a microprocessor to obtain an output indicative of the electrical properties of electrode interfaces for the ECG lead signal.

The invention relates to a method for selecting electrocardiogram lead in multiple lead synchronous electrocardiographic signals. The method comprises the following steps: acquiring multiple lead synchronous electrocardiographic signals by virtue of a physiological electrode, and respectively processing the electrocardiographic signals to acquire digital lead signals of the electrocardiographic signals; respectively analyzing the signal quality of the lead signals to obtain an ECG (electrocardiogram) signal level and a noise level of each lead signal; respectively calculating any two signals of the multiple lead signals to obtain correlation coefficients of the multiple lead signals; forming a matrix P of the correlation coefficients by the multiple correlation coefficients; and selecting a lead signal with maximum absolute value of the correlated coefficient and no interference for leading and storing the lead signal. The invention also relates to a device for implementing the method. The method and device for selecting electrocardiographic lead in multiple lead synchronous electrocardiographic signals have the beneficial effects of guaranteeing the accuracy of measurement results even under the circumstance of poor quality and high noise of electrocardiographic signals.

The invention relates to a quick blind source separating fetal electrocardioscanner and a detection method. The electrocardioscanner comprises a dual channel acquisition and analog-to-digital conversion module, an FPGA provided with an internal storage, a DSP and an ARM for separating a blind source, and an output device, wherein the dual channel acquisition and analog-to-digital conversion module is electrically connected with a common electrocardiogram lead cable and the FPGA through two data channels; the FPGA is electrically connected with the DSP through two data channels; the DSP is also sequentially electrically connected with the ARM and the output device ; and the DSP and the ARM are all externally connected with a program storage and a data storage. The electrocardioscanner adopts a high-speed acquisition and processing structure, detects fetal electrocardiosignals in aliasing electrocardiosignals in real time, adopts a blind source separation method to solve the problem that time domains and frequency domains of mother electrocardiosignals and the fetal electrocardiosignals are mutually overlapped and difficult to separate, and extracts the fetal electrocardiosignals efficiently and accurately for diagnosis.

A method for synthesizing electrocardiogram leads includes obtaining a sequence of voltage-time measurements for a set of electrocardiogram leads and subjecting the measurements to abstract factor analysis to obtain a set of eigenvalues and associated eigenvectors. A minimal subset of electrocardiogram leads is identified from which the voltage-time measurements can be calculated with acceptable error. Simplex optimization is performed on a subset of the voltage-time measurements measured with the minimal subset of electrocardiogram leads to obtain a universal transformation matrix, and the universal transformation matrix is multiplied by the subset of the voltage-time measurements to calculate the full set of voltage-time measurements. The full set of leads can be used to calculate a body surface map, and the eigenvalues can be tracked in time to predict the onset of pathology such as myocardial infarction.

The invention relates to a single-channel fetal electrocardiogram blind separation device based on oblique projection and a separation method. The separation device comprises a single-channel electrocardiogram signal acquisition module, a Doppler fetal heart sound acquisition module, an analog to digital conversion module, a microprocessor and a PC (personal computer) upper computer for separating and displaying signals. A switch-in end of the single-channel electrocardiogram signal acquisition module for acquiring aliasing electrocardiogram signals is connected with an electrocardiogram lead cable, an input end of the Doppler fetal heart sound acquisition module for acquiring fetal heart sound signals is connected with an ultrasonic probe, a switch-out end of the single-channel electrocardiogram signal acquisition module and a switch-out end of the Doppler fetal heart sound acquisition module are respectively connected with an analog input end of the analog to digital conversion module, a data output port of the analog to digital conversion module is connected with the microprocessor, and the microprocessor is connected with the PC upper computer. The separation method includes a fetal electrocardiogram QRS (quantum resonance spectrometer) wave group positioning method based on oblique projection and single-channel fetal electrocardiogram signal blind separation based on oblique projection. The separation device is reasonable in design and is convenient and practical; and the separation method is convenient and practical.

Techniques for predicting cardiac arrhythmia includes obtaining first data that indicates an electrocardiography recording from a patient; and, automatically deriving, on a processor, P-wave characteristics on a plurality of leads of the electrocardiography recording. A value for a first parameter, Pindex3, is determined based on a standard deviation of P-wave duraations automatically derived from only three leads of the plurality of leads. A risk of incidence of cardiac arrhythmia for the patient is determined based, at least in part, on the first parameter, Pindex3.

The invention relates to the medical field and specifically relates to a method for correcting electrocardiographic lead misconnection. The method introduces a concept of an electrode displacement matrix and combines lead data calculation manners in different lead systems to map data generated from the misconnection into correct lead connection data. The method for correcting the electrocardiographic lead misconnection provided by the invention can be applicable to different complicated misconnection manners in multiple lead systems (such as Wilson, EASI, 15 leads and 18 leads), solves problems such as the misconnection between a chest lead and limb leads which cannot be dealt with by current methods, and plays an important role in increasing doctors' working efficiency and relieving doctor-patient relations in actual clinical applications.

The present invention features that the lead method of synchronous 18-lead electrocardiogram converted in corrected orthogonal electrocardiogram mode includes back left deriving V7, V8 and V9 as the three lead axes to reflect the back wall of the left ventricle with V6 lead as base point, right deriving V3R, V4R and V5R as the three lead axes to reflect the right ventricle with V1 lead as base point, and synchronous displaying of the six lead axes and 12 conventional lead axes. The expanded lead method of synchronous 21 leads includes back left deriving V7, V8 and V9 as the three lead axes on the basis of V5 lead axis. The lead method including converting the inclined angles in orthogonal electrocardiogram mode with right and left side correction and multiple bedding plane electrocardiogram lead containing up and down whole angles is the combined application of lateral electrocardiogram and transverse plane/frontal plane electrocardiogram.

The invention provides an elastic straightjacket capable of assisting positioning and securing electrocardiogram electrodes. The elastic straightjacket is provided with a marked indication at the location corresponding to an obvious body surface mark, and a fixed mark assisting a user to position the electrocardiogram electrodes. Or, the elastic straightjacket incorporates electrocardiogram wires, electrocardiogram electrodes and an interface used for connecting to an electrocardiogram monitoring host. The elastic straightjacket meets the demand for wearability of future electrocardiogram monitoring equipment, a common user can accurately locate electrocardiogram electrodes by wearing the elastic straightjacket provided by the user, the electrocardiogram electrodes can be prevented from shedding and shifting, and the user will not feel uncomfortable after wearing the electrocardiogram monitoring equipment for a long time. A doctor can quickly measure the electrocardiogram under the circumstance that a patient does not need to take off his coat.

The invention discloses a multifunctional anesthesia monitor including a housing. A display screen is arranged on the upper part of the front side of the housing. An operation press key is arranged on the housing below the display screen. A port is arranged in the front end face of the housing. An alarm and an indicating lamp are arranged at the left side of the upper part of the housing. A light source probe and a temperature sensor are arranged on the left side face of the housing. A brain electricity function monitoring device and an electrocardiogram lead wire are arranged at the right side of the housing. The input terminal of the light source probe is connected with the output terminal of a time sequence control module electrically. The input terminal of the time sequence control module is connected with the output terminal of the single-chip microprocessor electrically. According to the invention, regular monitoring, depth of anesthesia monitoring and muscle relaxation monitoring required by modern anesthesia are implemented by using the multifunctional anesthesia monitor. Besides, the multifunctional anesthesia monitor integrates brain electricity monitoring and a heart rate variability value and a blood pressure fluctuating value, and can send alarm timely when the fluctuation of a monitoring value of a patient during the operation is too large. The analysis is comprehensive and the obtained data is more comprehensive and accurate, the safety of a surgical patient in the stage of narcosis is ensured well.

The invention relates to an electrocardiograph lead storage device. A driving shaft hole (3) and a driven shaft hole (4) are respectively arranged on two opposite side walls (2) of a box (1), a driving shaft (5) penetrates into the driving shaft hole (3), a driven shaft (6) penetrates into the driven shaft hole (4), a driving gear (7) is fixed on the driving shaft (5), a driven gear (8) is fixed on the driven shaft (6), the driving gear (7) and the driven gear (8) are identical and are meshed mutually, a crank (9) is disposed at one end of the driving shaft (5), lead guiding holes (11) are arranged on a front wall (10) of the box (1), lead outlet holes (13) are arranged on a rear wall (12) of the box (1), one end of each lead (21) is wound on the driving shaft (5) after penetrating into the box (1) via the corresponding lead guiding hole (11), continues being reversely wound on the driven shaft (6), and then penetrates out via the corresponding lead outlet hole (13), and a wiring terminal (14) is arranged at an end of each lead.

A patient monitor for determining a probability that a patient has acute cardiac ischemia including an input device connectable to a patient to acquire electrocardiogram (ECG) signals from the patient, an instrumentation amplifier connected to the input terminal to combine the signals and to generate at least one ECG lead, and an analysis module. The analysis module is operable to continuously read the ECG lead, to analyze a portion of the ECG lead for a period of time, and to calculate a probability that the patient has acute cardiac ischemia based at least in part on the analyzed portion of the ECG lead.

The invention discloses an electrocardiogram lead wire retraction and release appliance. The appliance comprises a retraction and release box, a lead wire, an automatic rebound device and a rebound stopping device; the automatic rebound device and the rebound stopping device are arranged in the retraction and release box and connected with the retraction and release box, and the lead wire is wound on the automatic rebound device; a first wire outlet 111 is formed in the top surface 11 of the retraction and release box 1, and one end of the lead wire penetrates through the first wire outlet 11 and is connected with a plug 3; a second wire outlet 121 is formed in the bottom surface 12 of the retraction and release box, and the other end of the lead wire 2 penetrates through the second wire outlet 121 and is connected with a test terminal 4. The electrocardiogram lead wire retraction and release appliance can realize automatic retraction and release of the lead wire, avoid mutual winding of lead wires, save the time and simultaneously prolong the service life of the lead wire.

The invention discloses an electrocardiosignal collector which comprises an electrocardiographic lead, a voltage conversion device, an electrocardio collection chip, an audio frequency modulating unit and an audio frequency interface. The electrocardiographic lead is connected with the electrocardio collection chip. Electrocardio signals are detected to be input into the electrocardio collection chip. The electrocardio collection chip conducts analog front end amplification on the input electrocardio signals, low-frequency simulation signals are formed to be output to the audio frequency modulating unit. The audio frequency modulating unit conducts high-frequency modulating on the low-frequency simulation signals and outputs the low-frequency simulation signals. An electrocardiosignal collector is connected with the audio frequency input end of an external device through the audio frequency interface. The voltage conversion device is connected with the audio frequency interface, and voltage is generated according to input of the external device to supply power to the electrocardiosignal collector. The audio frequency modulating unit is connected with the audio frequency interface to output the modulated electrocardio simulation signals to the external device. According to the electrocardiosignal collector, the audio part of an intelligent terminal is fully utilized, collection and transmission of electrocardiosignals are completed, the hardware complexity of the collector is minimized, and the cost of the collector is lowered effectively.

The embodiment of the invention relates to a method for simulating and rebuilding ECG lead data based on neural network algorithm, which comprises the following steps: obtaining ECG monitoring data ofthe monitored person; the ECG monitoring data comprises the lead data of at least one limb lead and the lead data of at least one chest lead; a multi-neural network regression prediction model is trained for the reconstruction of multi-lead ECG signals based on the neural network machine learning algorithm; the independent variable of the multi-neural network regression prediction model is the lead data of at least one limb lead and the lead data of at least one chest lead; the dependent variable is the lead data of the remaining unknown leads except at least one limb lead and at least one chest lead; the multi-neural network regression prediction model comprises a weight coefficient and a bias coefficient, and the weight coefficient and the bias coefficient are determined by the resultsof the training of the neural network machine learning algorithm; the lead data of the remaining unknown leads is predicted according to the weight coefficient and the bias coefficient obtained by thetraining.

The invention relates to an electrocardiographic lead detection method and device, equipment and a storage medium. A terminal acquires lead types by acquiring electrocardiogram data according to electrocardiogram data and a preset lead detection model, wherein the lead types comprise lead type information corresponding to electrode positions. The terminal acquires the lead types by acquiring the electrocardiogram data according to the lead detection model in the electrocardiogram data, so that when electrocardiograms are classified, the lead types are determined first, and then classificationresults of the electrocardiograms are determined according to the lead types. Therefore, accuracy of electrocardiogram classification is improved.

The invention provides a single-time P300 detection method based on matrix grey modeling, belongs to the field of cognitive neuroscience and relates to a feature extraction and recognition detection method of an event related potential P300, in particular to a single-time P300 detection method based on matrix grey modeling in a grey theory.The method comprises the steps that 1, a original acquired electroencephalogram signal is preprocessed; 2, electrocardiographic lead combinations are selected, namely four electrocardiographic leads with most obvious top occipital region waveform differences are selected as optimal electrodes according to oscillograms of target stimulus and non-target stimulus of training set data; 3, segmented matrix grey modeling is conducted on the data of the four electrocardiographic leads, and model parameters are extracted to serve as feature vectors; 4, a Fisher ratio value method is utilized to perform optimal feature selection, and meanwhile the purpose of decreasing the number of feature vector dimensions is achieved; 5, a support vector machine classifier is utilized to classify feature vectors, and single-time P300 detection recognition is achieved.Experimental data tests show that the method can improve single-time P300 detection recognition rate, and the correct recognition rate can be further improved during less-time superposition.

The invention provides an electrocardiogram cable reeling device. The device is characterized by comprising a cable distribution box, a chest cable reel, an upper limb cable reel and a lower limb cable reel, wherein the chest cable reel, the upper limb cable reel and the lower limb cable reel are arranged in the cable distribution box respectively; a general outlet, a chest cable outlet, an upper limb cable outlet and a lower limb cable outlet are arranged on the cable distribution box; ten cables of an electrocardiogram machine are placed in the cable distribution box, and one end of each cable extends out of the cable distribution box through the general outlet and is electrically connected with the electrocardiogram machine; with respect to the ten cables, six chest cables, two upper limb cables and two lower limb cables are reeled on respective reels respectively; the other ends of the six chest cables, two upper limb cables and two lower limb cables extend out of the cable distribution box through respective outlets and are electrically connected with the respectively conductive electrodes.

The invention provides a human body electrocardiographic R wave detection system. The system comprises a pulse wave signal acquisition module, a signal processing unit and a high-pressure pulse tumor treatment system. The pulse wave signal acquisition module transmits acquired pulse information to the signal processing unit, the signal processing unit processes the received pulse signals and then sends the pulse signals to a real-time display device and the high-pressure pulse tumor treatment system, and the high-pressure pulse tumor treatment system receives the signals and then completes the discharging process. Pulse waves are an energy expression form with blood flowing as a carrier, and transmission of the pulse waves is not affected by high-frequency high-voltage electric signals; when the system is used in high-pressure pulse tumor treatment, time for waiting for recovery is not needed, an R wave moment can still be calculated, data is stable and reliable, the defect that R wave detection is likely to be affected by high-pressure pulse signals in a traditional electrocardiographic lead method is avoided, and the risks of high-pressure pulses on patients in the operating process are reduced.

A smart toilet with a function of electrocardiographic lead monitoring, includes a toilet base, and further includes a body connected to the toilet base. The body is provided with a controller, and an electrocardiographic lead monitoring module, a display or voice prompt module, a power supply module for supplying power, which are electrically connected to the controller respectively. The human body ECG signal obtained by the electrocardiographic lead monitoring module is processed by the controller, to obtain human body electrocardiographic lead data, and the display or voice prompt module is controlled to output the data. The invention combines the electrocardiographic monitoring function with the toilet, which enables people to know electrocardiographic data quickly and conveniently while using the toilet, so as to understand their own heart health, thereby detecting and dealing with possible diseases as soon as possible.