17 results about "Korotkoff sounds" patented technology

The invention discloses an electronic sphygmomanometer with an atrial fibrillation detection function, an atrial fibrillation detection method and device and electronic equipment, and belongs to the technical field of medical instruments. The electronic sphygmomanometer comprises a cuff, a processor, a detection result output component, a pressure signal detection component and a piezoelectric signal detection component, the pressure signal detection component and the piezoelectric signal detection component are respectively used for collecting a pressure signal in the cuff in a pressure release stage in the current blood pressure measurement process and a Korotkoff sound signal generated by brachial artery pulsation; the processor is used for analyzing and processing the pressure signal and the Korotkoff sound signal, acquiring the signal time position and the amplitude of the Korotkoff sound signal, acquiring a pulse interval sequence of the current blood pressure measurement based on the signal time position, and acquiring an atrial fibrillation state classification result corresponding to the current blood pressure measurement based on the pulse interval sequence and the amplitude; and the detection result output component is used for outputting an atrial fibrillation state classification result. The electronic sphygmomanometer can accurately detect whether atrial fibrillation occurs or not.

The invention relates to the technical field of biomedical signal processing and medical electronics, in particular to a blood pressure measuring method for non-invasive exercise blood pressure monitoring. The method aims to solve the technical problem of low blood pressure measurement accuracy caused by broadband noise interference and failure of a fixed parameter model in a motion state in the prior art. According to the technical scheme, the method comprises the steps that a cardiac cycle reference signal and a Korotkoff sound signal are synchronously collected, a sampling window is calculated in a self-adaptive mode by utilizing a cycle triggering feature point gating mechanism and combining a heart rate, and time domain precise interception of the signals is achieved; carrying out root mean square calculation and Savitzky-Golay filtering on the intercepted signal, and keeping waveform characteristics while denoising; constructing a multi-dimensional feature regression model containing a peak value, skewness, kurtosis and dynamic template similarity so as to accurately judge systolic pressure and diastolic pressure; an automatic recharging mechanism is triggered by monitoring signal quality, and strong interference is physically avoided. The method has the advantages of being high in anti-noise capacity, high in feature extraction robustness and accurate and reliable in measurement result.

The embodiment of the invention provides equipment, a method and a device for measuring blood pressure based on a boosting process. The equipment comprises a cuff with an inflatable air bag, a pressure signal acquisition unit, a piezoelectric signal acquisition unit and a processor, the piezoelectric signal acquisition unit is arranged on the side, attached to the arm, of the cuff, and the pressure signal acquisition unit acquires pressure signals in the cuff in the air bag inflation stage when the equipment is used for measuring blood pressure; the piezoelectric signal acquisition unit is used for synchronously acquiring piezoelectric signals generated by brachial artery pulsation in an air bag inflation stage; and the processor is used for processing the piezoelectric signal to obtain the signal position of the effective Korotkoff sound signal, and obtaining a blood pressure measurement result based on the signal amplitude of the pressure signal at the signal position. In the blood pressure measurement process, the air bag can be inflated slowly and evenly, pressurization is stopped immediately when it is detected that the pressure reaches a target value, the use comfort of the device is improved, meanwhile, Korotkoff sound is accurately detected, and the blood pressure measurement accuracy is improved.

The present invention comprises a cuff (20), a cuff pressure adjustment unit (32, 33), and a pressure sensing unit (31) that senses cuff pressure. During a pressure release process, the time at which a waveform feature point of a pulse beat was generated for each pulse of a pulse wave indicated by an artery passing through a measurement target site is recorded. During the pressure release process, a memory (51) is caused to sequentially store, as a data pair, the time at which the waveform feature point of the pulse beat was generated and the cuff pressure at that time. The cuff pressure is displayed on an indicator (50).In the pressure release process, an observer listening for a Korotkoff sound with a stethoscope while observing the cuff pressure displayed on indicator (50) operates an operating unit (52B) and inputs a time signal indicating the time at which the observer judged that the generation of the Korotkoff sound had ceased. A data pair corresponding to one pulse beat preceding a data pair corresponding to the time is specified, and a cuff pressure contained within the specified data pair is recorded as a corrected diastolic blood pressure value.

The present disclosure relates to the technical field of blood pressure measurement. Disclosed are a blood pressure measurement device and method having Korotkoff sound recognition and playback functions. The blood pressure measurement device comprises an air pressure sensor, a vibration sensor, and a control module. The air pressure sensor is configured for collecting a pressure analog signal, and the pressure analog signal is configured for characterizing the air pressure within a cuff. The vibration sensor is configured for acquiring a brachial artery pulsation signal. The control module is configured for controlling the air pressure in the cuff and identifying a Korotkoff sound from the brachial artery pulsation signal, and obtaining systolic blood pressure data and diastolic blood pressure data according to the Korotkoff sound and the air pressure. The control module is also configured for responding to a playback operation, playing back the cuff deflation process and the process from appearance to disappearance of the Korotkoff sound, and displaying a blood pressure value, so that a user can analyze the Korotkoff sound to verify the accuracy of a blood pressure measurement result.

The present disclosure discloses a blood pressure measurement device with a Korotkoff sounds recognition and playback function, and a method thereof. The blood pressure measurement device includes an air pressure sensor, a vibration sensor and a control module; the air pressure sensor being configured to collect pressure analog signals; the vibration sensor being configured to collect brachial artery pulse signals; and the control module being configured to control the air pressure inside the air bladder and recognize Korotkoff sounds in the brachial artery pulse signals, and to obtain systolic pressure data and diastolic pressure data according to the Korotkoff sounds and the air pressure; the control module being further configured to respond to a playback operation to play back an air bladder pressure deflation process and a process from the appearance to the disappearance of the Korotkoff sounds, and display blood pressure values

A method of operation of a multi-sequence generator for enhanced sequence processing and classification includes generating low-level descriptor (LLD) features associated with Korotkoff sounds (K-sounds) indicated by patient measurement data. The method further includes embedding, by an input processing stage of a multi-sequence generator, at least a portion of the LLD features in a vector space to generate a plurality of LLD feature vectors. The method further includes determining, by a multi-head sequence attention module of the multi-sequence former, a sequence attention score and a temporal attention score associated with the plurality of LLD feature vectors. The method further includes generating, by a multi-sequence former, an output based on the sequence attention score and the temporal attention score. The output is indicative of a patient cardiovascular risk assessment associated with Korotkoff sound.

The present disclosure relates to a cuff airbag, a cuff, a blood pressure measurement apparatus and method, and an electronic device. The cuff airbag comprises: an airbag, an air cavity being formed inside the airbag; at least one piezoelectric sensor, wherein when two piezoelectric sensors are provided, the two piezoelectric sensors are spaced apart from each other on an inner wall of the airbag, and the two piezoelectric sensors are electrically connected; and an air pipe joint, wherein the air pipe joint is arranged on an outer wall of the airbag, and the air pipe joint comprises a first air passage in communication with the air cavity and an electrical connector electrically connected to at least two piezoelectric sensors. According to the present disclosure, the two piezoelectric sensors are spaced apart from each other on the inner wall of the airbag, thereby providing a stable environment for the piezoelectric sensors. Moreover, the blood pressure is detected by means of the air pressure and piezoelectric signals, thereby improving the detection reliability. The blood pressure measurement apparatus provided in the present disclosure comprises an air storage chamber, a piezoelectric sensor, and an air pipe joint, wherein the air storage chamber is composed of an air cavity inside an airbag or is enclosed by two cuff portions; the piezoelectric sensor is disposed inside the air storage chamber, thereby improving the detection accuracy of a Korotkoff sound signal.

A sphygmomanometer of the present application has a blood pressure measuring cuff (20) to be worn by winding around a measurement site, a pressure device (32, 33) to pressurize or depressurize the cuff (20), and a sound detecting device (35) to detect a sound emitted from the measurement site via the cuff (20). A magnification setting section (110) variably sets a magnification for a Korotkoff sound component based on a first passing time required for a pressure of the cuff (20) to pass through a first pressure range during pressurization of the cuff (20). A blood pressure calculating section (350, 110) receives an output of the sound detecting device (35) corresponding to the sound from the cuff (20), and amplifies a Korotkoff sound component contained in the output at the set magnification to calculate a blood pressure of the measurement site.

Embodiments of the present application provide a pulse wave conduction velocity measurement method and device based on an upper arm sphygmomanometer, electronic equipment and storage medium. The method is applied to an upper arm sphygmomanometer provided with a cuff, an electrocardio signal acquisition component and a Korotkoff sound signal acquisition component. The method comprises: after the air bag of the cuff worn on the upper arm of a user is inflated to compress the brachial artery to be closed, acquiring the electrocardio signal collected by the electrocardio signal acquisition component and the Korotkoff sound signal collected by the Korotkoff sound signal acquisition component; analyzing the electrocardio signal of a specified heartbeat cycle to acquire the peak position of the R wave in each heartbeat cycle; analyzing the Korotkoff sound signal based on the peak position to determine the arrival time of the Korotkoff sound signal in each heartbeat cycle; and calculating the pulse wave conduction velocity based on the difference between the arrival time of the Korotkoff sound signal and the peak position of the R wave. The method improves the measurement accuracy of the pulse wave conduction velocity.

The present invention discloses a blood pressure measurement method and device, comprising the following steps: S1: obtaining the pressure and oscillatory waves within a cuff through a pressure sensing device, and obtaining Korotkoff sounds through a Korotkoff sound sensing device; S2: performing feature extraction on the oscillatory waves within the cuff to obtain oscillatory wave features; performing feature extraction on the Korotkoff sounds to obtain Korotkoff sound features; S3: fusing the oscillatory wave features, the Korotkoff sound features, and the pressure within the cuff to obtain comprehensive features; and S4: inputting the comprehensive features into a prediction model to obtain systolic pressure, diastolic pressure, and pulse rate. The present invention utilizes data from two modalities, Korotkoff sounds and oscillatory waves, to enrich the extracted features. The output of the prediction model includes three parts: systolic pressure, diastolic pressure, and pulse rate. The constructed loss function is a multi-objective loss function. Multi-objective learning is used to improve the generalization ability of the model, combining the advantages of the oscillometric method and the auscultatory method, and improving the accuracy and anti-interference ability of blood pressure measurement.

The embodiment of the invention provides a pulse wave conduction velocity measuring method and device based on an upper arm type sphygmomanometer, electronic equipment and a storage medium. The method is applied to an upper arm type sphygmomanometer provided with a cuff provided with an air bag, an electrocardiosignal acquisition component and a Korotkoff sound signal acquisition component, and comprises the following steps of: inflating the air bag of the cuff worn on the upper arm of a user until the cuff compresses brachial artery to close; acquiring an electrocardiosignal acquired by an electrocardiosignal acquisition part and a Korotkoff sound signal acquired by a Korotkoff sound signal acquisition part; analyzing the electrocardiosignal of the specified heartbeat cycle to obtain the peak position of the R wave in each heartbeat cycle; analyzing the Korotkoff sound signal by taking the peak position as a reference, and determining the arrival time of the Korotkoff sound signal in each heartbeat cycle; and calculating the pulse wave conduction velocity based on the difference between the arrival time of the Korotkoff sound signal and the peak position of the R wave. According to the method, the pulse wave conduction velocity measurement accuracy is improved.

This disclosure relates to a blood pressure monitor and a method for detecting the working status of a blood pressure detection circuit. The blood pressure monitor includes: a signal generation circuit for generating an excitation signal; a blood pressure detection circuit including a piezoelectric Korotkoff sound sensor electrically connected to the signal generation circuit and outputting a response signal based on the excitation signal; a differential circuit electrically connected to the piezoelectric Korotkoff sound sensor for acquiring the response signal and performing differential processing on the acquired response signal and a reference signal to obtain a differential result; and a processing circuit electrically connected to the differential circuit for determining the working status of the blood pressure detection circuit based on the differential result. This disclosure verifies the working status of the blood pressure detection circuit by acquiring the response signal generated by the excitation, thereby enabling the blood pressure monitor to perform a self-test of the blood pressure detection circuit before blood pressure measurement, thus determining in advance whether the blood pressure monitor can detect blood pressure normally.

The application relates to the technical field of sphygmomanometers, and discloses a blood pressure measuring device, a blood pressure measuring method, an electronic device, a storage medium and a program product.The blood pressure measuring device comprises a cuff, a piezoelectric sensor, an air pipe, a pressure sensor and a host computer.The cuff comprises a first cuff part and a second cuff part, the first cuff part and the second cuff part enclose an air storage chamber, the first cuff part and the second cuff part are integrally formed or are sealingly connected, an air nozzle is arranged on the cuff, the air nozzle is in communication with the air storage chamber, the piezoelectric sensor is fixed to the inside of the air storage chamber and is used for collecting Korotkoff sound signals, the air pipe has a first end and a second end, the first end is connected to the air nozzle, the air pipe is in communication with the air storage chamber, the pressure sensor is connected to the second end, the pressure sensor is used for collecting pressure signals, the pressure signals are used for representing the internal air pressure of the air storage chamber, and the host computer is used for predicting a blood pressure measurement result according to the Korotkoff sound signals and the pressure signals.Compared with conventional technologies, the application can improve the accuracy of blood pressure measurement results.

The embodiment of the invention provides blood pressure measuring equipment and a Korotkoff sound signal detection method and device. The blood pressure measuring equipment comprises a processor, a pressure signal detection unit, a cuff and a pneumatic oscillation unit, an air bag is arranged on the cuff, the pneumatic oscillation unit is arranged on the air bag, and the pressure signal detection unit detects a pressure signal formed by air pressure in the air bag along with time change in the deflation stage of the air bag in the blood pressure measuring process; the pneumatic oscillation unit vibrates in response to transient pressure change in the air bag to generate a transient high-frequency oscillation component; and the processor processes the pressure signal to obtain a pulse wave signal superposed with the transient high-frequency oscillation component, and detects a Korotkoff sound signal based on the pulse wave signal. According to the device, gas in the air bag serves as a force transmission medium, transient pressure change in the air bag is converted into global pressure transient response in the air bag through the pneumatic oscillation unit, the pulse wave signal peak value is strengthened, and the pulse wave detection accuracy is improved.

The invention relates to an intelligent self-adaptive inflation and deflation control device which comprises an inflation pump and a first air path in through connection with an inflation nozzle of the inflation pump, and an air release valve and an exhaust valve are further arranged along the first air path. The deflation control equipment further comprises a proportional valve for controlling the deflation rate, and a pagoda connector of the proportional valve communicates with a second gas circuit. According to the intelligent pressure control system, the stop points are counted and verified based on pulse waves, the optimal inflation stop point of each person is dynamically determined, intelligent pressure control is achieved, the discomfort caused by excessive inflation can be reduced, and the safety of a patient is improved. In particular to an adaptive deflation rate algorithm based on physiology, which is favorable for accelerating deflation at high heart rate, slowing deflation at low heart rate, improving the detection precision of Korotkoff sound and improving the accuracy of blood pressure measurement, and depending on multi-stage adaptive PID parameter adjustment, PID parameters can be optimized aiming at different deflation rates, and the precision of constant-speed deflation rate control is improved.

The application discloses an electronic sphygmomanometer with atrial fibrillation detection function, an atrial fibrillation detection method and device and electronic equipment, and belongs to the technical field of medical instruments. The electronic sphygmomanometer comprises a cuff, a processor, a detection result output component, a pressure signal detection component and a piezoelectric signal detection component. The pressure signal detection component and the piezoelectric signal detection component are respectively used for collecting a pressure signal in the cuff in a pressure release stage and a Korotkoff sound signal generated by brachial artery pulsation in a current blood pressure measurement process. The processor is used for analyzing and processing the pressure signal and the Korotkoff sound signal, acquiring a signal time position and an amplitude of the Korotkoff sound signal, acquiring a pulse interval sequence of the current blood pressure measurement based on the signal time position, and acquiring an atrial fibrillation state classification result corresponding to the current blood pressure measurement based on the pulse interval sequence and the amplitude. The detection result output component is used for outputting the atrial fibrillation state classification result. The electronic sphygmomanometer can accurately detect whether atrial fibrillation occurs.