26 results about "Cuff pressure" patented technology

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.

A blood pressure measuring device includes: a cuff to be wrapped around a measurement target site; a pressure sensing unit configured to detect cuff pressure; a pressure control unit configured to control the cuff pressure; a blood pressure calculation unit configured to perform blood pressure calculation processing based on the cuff pressure;and a winding strength determination unit configured to perform winding strength determination processing to determine a winding strength of the cuff at the target measurement location, wherein the pressure control unit performs constant pressure control to maintain the cuff pressure at a constant target pressure value from the start of an increase in cuff pressure until the end of the winding strength determination processing, and performs constant rate pressurization control to increase the cuff pressure at a constant rate to calculate the blood pressure after completion of the winding strength determination processing, and wherein the winding strength determination unit determines the winding strength during the constant pressure control.

A blood purification device (10) comprises: a measurement unit (44) that uses a cuff (54) for pressurizing a blood vessel of a patient undergoing blood purification treatment to measure the patient's blood pressure values and the patient's pulse wave amplitude values corresponding to cuff pressures; and a prediction unit (50) that receives, as input, time-series data including the blood pressure values and the pulse wave amplitude values measured in the blood purification treatment, and outputs the patient's blood pressure prediction value.

The utility model relates to a tracheal catheter capable of monitoring air bag pressure, which comprises an air guide tube, an air bag sleeved outside the air guide tube, an inflation tube used for inflating and deflating the air bag and a pressure measuring device capable of monitoring the air bag pressure, and the pressure measuring device comprises a pressure indicating bag arranged outside the air bag and a liquid storage bag sleeved outside the pressure indicating bag. The pressure indication bag is communicated with the air bag through an inflation tube, and indication liquid used for displaying expansion and contraction changes of the pressure indication bag is arranged in the liquid storage bag. After the technical scheme is adopted, the liquid storage bag is arranged outside the air bag, the liquid storage bag is located outside the human body during use, safety is higher, risks caused by accidental leakage are avoided, the pressure indicating bag and the liquid storage bag are used for monitoring the pressure change of the air bag, simplicity and intuition are achieved, and even if the pressure change is small, the liquid storage bag can not be used. The liquid level sensor has the advantage of being convenient to monitor.

The invention relates to the field of intelligent wearing and blood pressure detection, in particular to a novel blood pressure detection method combining photoelectric pulse waves and a wrist cuff. The system comprises a wrist cuff, an air pump, a barometer, an analog-to-digital conversion module, a photoelectric pulse wave detection module, an MCU calculation unit, a display module and a cloud data module. The cuff pressurization process is started, and meanwhile photoelectric pulse wave detection is started, that is to say, blood pressure data in the cuff pressurization process can be obtained, and data of photoelectric pulse waves can also be obtained at the same time. Particularly, a photoelectric pulse wave detection module needs to be placed behind a cuff pressurization physical blocking line, and the purpose is to solve the problems that a wrist type cuff is small, pressurization saturation is fast, and once the volume of the cuff is full, the pressure value of the cuff is not in linear correlation. For people with hypertension, blood flow cannot be linearly blocked, a blood pressure value cannot be accurately calculated, photoelectric pulse wave data are increased to solve the problem that hypertension cannot be accurately measured due to the fact that a wrist cuff is small, and meanwhile the blood pressure measuring range of the wrist cuff is increased.

The invention discloses a pneumatic pressurization control method and system for an electronic sphygmomanometer and a related device, which are used for improving the comfort of a tested person and the measurement safety and improving the measurement efficiency of a blood pressure measurement process on the whole. The method comprises the following steps: carrying out component separation on a photoelectric volume pulse wave signal to obtain a pulsation component reflecting the periodic change of arterial blood flow, and constructing an amplitude feature sequence updated along with a pressurization process; calculating the attenuation rate of the amplitude feature sequence relative to the reference sequence in the current pressure interval; constructing a nonlinear response trend model of the pulse amplitude to the pressurization process; whether the far-end artery blood flow enters a blocking critical state or not is judged in combination with a preset background noise base; if yes, the cuff is controlled to stop continuous pressurization, and the self-adaptive pressurization upper limit parameter measured this time is determined according to the cuff pressure at the corresponding moment; and controlling the sphygmomanometer to be switched from the pressurization control process to the deflation measurement process based on the self-adaptive pressurization upper limit parameter.

The invention belongs to the technical field of hemostasis instruments, and provides a method for measuring blood vessel locking pressure by an orthopedic surgery hemostasis instrument, which comprises the following steps of: inflating a cuff wound on a limb until a blood vessel is completely locked, and controlling the cuff to release pressure at a constant speed, the pressure sensor and the independent pulse vibration sensor synchronously and independently collect a cuff pressure value and a pulse wave signal, the pulse wave signal is processed to obtain the trend that the amplitude of the pulse wave signal changes along with the pressure, and the amplitude is converted from a stable baseline state representing vascular atresia to the corresponding cuff pressure when the amplitude continuously rises for the first time. And the critical opening pressure of the blood vessel is accurately judged and is used as an individualized blood vessel locking pressure measurement value. The invention also discloses steps for carrying out hemostasis operation by using the method and a hemostasis instrument for realizing the method. The problem that in the prior art, measurement is not accurate due to the fact that pressure or pressure pulsation signals depend on experience is solved, and accurate measurement of the vascular locking pressure is achieved.

According to one aspect, there is provided a method of estimating the reliability of a cardiac output, CO, measurement obtained for a subject using an arterial waveform analysis, AWA, technique. The AWA technique is calibrated using a CO measurement obtained using a thermodilution CO measurement technique. The method comprises: (a) during a first time period in which a first CO measurement is obtained for the subject using the thermodilution CO measurement technique: (i) initiating (203) inflation of a cuff at a first location on the subject; (ii) obtaining (205) a first cuff pressure signal comprising measurements of pressure inside the cuff during inflation; (iii) analysing (207) the first cuff pressure signal to derive a relationship between oscillations in the volume of an artery under the cuff and pressure in the artery; and (iv) estimating (209) a first arterial compliance of the artery for a range of cuff pressures based on the determined relationship; (b) during a second time period after the first time period, repeating (211) steps (i)-(iv) to estimate a second arterial compliance of the artery; and (c) using (213) the results of a comparison of the first arterial compliance and the second arterial compliance to determine the reliability of a CO measurement obtained during the second time period using the AWA technique.

The invention relates to a multi-parameter analysis method integrated with arteriosclerosis assessment and a health monitoring system, and the method comprises the steps: determining a pressure oscillatory wave signal based on a cuff pressure signal through synchronously collecting the cuff pressure signal and electrocardiosignals and photoelectric volume pulse wave signals of two-side finger tips; calibrating a blood pressure analysis process of the pressure oscillatory wave signal based on a systolic pressure calibration reference determined by the photoelectric volume pulse wave signal, and determining a blood pressure value; calculating a vascular function evaluation result including the arteriosclerosis degree based on a heartbeat time sequence reference determined by the electrocardiosignal, the cuff pressure signal and the photoelectric volume pulse wave signal; performing multi-parameter correlation analysis on the blood oxygen signal and the electrocardiosignal extracted from the photoelectric volume pulse wave signal to obtain a multi-parameter analysis result; the blood pressure value, the blood vessel function evaluation result and the multi-parameter analysis result are integrated, and a comprehensive health evaluation report is generated; according to the invention, integration of multi-parameter acquisition, accurate calculation and deep analysis can be realized, and comprehensive and reliable health assessment support is provided.

The invention provides a medical inflation device. The medical inflation device comprises an air storage chamber, a constant pressure chamber, a pressure detection module and a plurality of airflow control modules. The air inlet end of the constant pressure chamber is connected with the air outlet end of the air storage chamber through a first controllable flow path, and the air outlet end of the constant pressure chamber is a cuff air supply outlet; the gas inlet end of the gas storage chamber is connected with various gas sources through a second controllable flow path; the air outlet end of the constant pressure chamber is also connected with external atmosphere through a third controllable flow path; airflow control modules are arranged on the first controllable flow path, the second controllable flow path and the third controllable flow path; the airflow control module is used for regulating and controlling airflow on-off and flow; the system has the functions of multi-gas-source redundancy, real-time detection and correction and gas safety guarantee, and the pressure of the cuff can be automatically adjusted in real time through pressure feedback.

A blood pressure measurement device includes a cuff to be wrapped around a measurement target site, a pressure detection unit configured to detect a cuff pressure, a pressure control unit configured to control the cuff pressure, a blood pressure calculation unit that calculates based on the cuff pressure, and a wrapping strength determination unit configured to determine a wrapping strength of the cuff, in which the pressure control unit performs a constant-pressure control to maintain the cuff pressure at a constant target pressure value from a start of an increase in the cuff pressure to an end of a wrapping strength determination processing, and performs a constant-speed pressurization control to increase the cuff pressure at a constant speed for calculating a blood pressure after the end of the wrapping strength determination processing, and the wrapping strength determination unit determines the wrapping strength during the constant-pressure control.

The invention provides a method, a device, a storage medium, a computer program product and an external defibrillation monitor for processing blood pressure measurement signals and blood pressure storage data. A method for processing a blood pressure measurement signal includes: determining a characteristic of each pulsation in a pressure measurement as a function of time; comparing the characteristics of the pulsations and determining a first number of consistent pulsations in the pressure measurements, the first number being greater than or equal to two, the difference between the characteristics of the consistent pulsations being less than a predetermined characteristic threshold; calculating a pulsation amplitude ratio between the average pulsation amplitude and a preceding average pulsation amplitude and comparing it to a predetermined pulsation amplitude ratio threshold; in response to the pulsation amplitude ratio being less than a pulsation amplitude ratio threshold, storing the cuff pressure value and an average pulsation amplitude; repeating the steps for each deflation; and calculating an average arterial pressure, systolic pressure, and diastolic pressure using the plurality of cuff pressure values and the plurality of average pulsation amplitudes for the successive deflation.

According to the non-invasive blood pressure estimation method based on multiple measurement pulse wave fusion, multiple cuff measurements are conducted on the same object, quality evaluation is conducted on the pulse wave oscillation sequence obtained through multiple measurements, all irregular oscillation waveforms are deleted, it is ensured that the reserved waveforms are regular waveforms, and the accuracy of blood pressure estimation is improved. All amplitude data are mapped to the same coordinate system through pressure values in the cuff pressure curve; due to the fact that all irregular waveforms are deleted, stable and high pulse wave amplitude data can be obtained after all reserved pulse wave segments are spliced, a unified oscillation envelope is formed by means of the overlapping performance of multiple pulse waves on a pressure axis, and then the blood pressure is obtained through the unified envelope.

The invention discloses a double-channel fused high-precision blood pressure measurement device and a blood pressure value estimation method. The device comprises an air bag cuff, an air bag pressure sensor, an array type skin pressure sensor and a micro-processing unit, the air bag pressure sensor obtains air pressure data in the air bag, the array type skin pressure sensor obtains pulse pressure data, and the microprocessing unit is used for receiving the data and conducting fusion processing to obtain a final blood pressure estimation value. The skin pulse signal pressure sensing array is introduced on the basis of cuff pressure detection, local pulse waveforms can be directly collected, external noise interference is reduced, and signal stability is improved; besides, by means of double-channel fusion, air bag pressure signals and skin pulse array signals are combined, blood pressure estimation refers to cuff pressure changes and is combined with continuous pulse waveforms, adaptability to different individuals and high-precision blood pressure measurement are achieved, meanwhile, the recognition capacity of weak pulse signals is improved, and the measurement failure or error probability is reduced.

The present application relates to the technical field of blood vessel health detection, and discloses a family blood vessel hardness and blood pressure combined detection method and system based on four-cuff pressure wave and finger clip dual-wavelength PPG fusion. The method collects pressure signals through synchronous inflation and deflation of four limb cuffs, and synchronously collects dual-wavelength PPG signals, pre-processes multi-channel signals, detects feature points, and aligns time, calculates blood pressure, ankle-brachial index and pulse wave velocity, and based on pulse wave velocity, ankle-brachial index and PPG waveform characteristics, weighted calculation or rule determination is carried out to obtain blood vessel hardness evaluation results. When the signal quality does not meet the preset condition, a retest prompt or a detection result with a confidence mark is output.

The application provides a non-invasive blood pressure waveform detection method and a blood pressure measuring device. A cuff is used to be bound on a subject's limb. An inflation device is communicated with the cuff through an air path to inflate the cuff. A deflation device is communicated with the cuff through an air path to deflate the cuff. A cuff pressure sensor is located on the communication air path between the inflation device and the deflation device and the cuff to detect the gas pressure in the cuff in real time and obtain a pressure oscillation waveform. A controller is electrically connected with the inflation device, the deflation device and the cuff pressure sensor. The controller controls the inflation device, the deflation device and the cuff pressure sensor to perform the inflation and deflation process on the cuff according to the non-invasive blood pressure waveform detection method and generate an envelope curve of blood pressure. The scheme shortens the cycle time of blood pressure measurement.

Systems and methods for measuring blood pressure. In some embodiments, the system includes a speckle plethysmography sensor and processing circuitry. The system may be configured to: perform blood flow measurements and measurements of cuff pressure of a subject using a speckle plethysmography sensor when the cuff pressure of a cuff worn by the subject changes; and calculating a first blood pressure from the blood flow measurement and the cuff pressure measurement.

To detect abnormalities in patients undergoing blood purification therapy. [Solution] The blood purification device 10 includes a measuring unit 44 that measures the pulse wave amplitude value relative to the cuff pressure using a cuff 54 that pressurizes the blood vessels of a patient undergoing blood purification treatment, a management unit 46 that generates a progress value according to the progress of the blood purification treatment, and a detection unit 50 that detects abnormalities related to the patient during blood purification treatment using the pulse wave amplitude value and the progress value at the time of measurement of the pulse wave amplitude value.

This invention provides a method for blood pressure detection and a refrigerator. The blood pressure detection method includes: identifying the user's identity information; matching the corresponding calibrated photoplethysmography (PPG) signal and cuff pressure gold standard based on the identity information; acquiring the user's actual PPG signal; performing similarity analysis between the actual PPG signal and the calibrated PPG signal under systolic and diastolic conditions, respectively, and selecting the corresponding calibration value based on the analysis results; inputting the actual PPG signal into a deep learning model corresponding to the calibration value to obtain inferred systolic and diastolic blood pressure; and correcting the inferred systolic and diastolic blood pressure according to a preset blood pressure correction formula to obtain the final systolic and diastolic blood pressure. This invention significantly improves the accuracy and trend tracking capability of user blood pressure detection; and enables cuffless and convenient blood pressure monitoring.

A sphygmomanometer performs blood pressure measurement by an oscillometric method using a pressure sensor detecting pressure inside a blood pressure measuring cuff by temporarily pressing a wrist as a measurement target site with the cuff, also including: a mode operation unit inputting an instruction mode for switching a mode to a nighttime blood pressure measurement mode wherein the blood pressure measurement is automatically started according to a predetermined schedule; a first determination unit that temporarily pressurizes the cuff to a pressure lower than a cuff pressure used for the blood pressure measurement along with an input instruction mode and a shift to the nighttime blood pressure measurement mode, and determines a winding state of the cuff on the basis of an output of the pressure sensor; and a notification unit that, along with determination of the winding state of the cuff, notifies the determined winding state of the cuff.

The utility model relates to a tracheal catheter capable of indicating cuff pressure, which relates to the technical field of tracheal catheters and comprises a catheter body, a cannula is sleeved at the lower end of the catheter body in a sliding manner, an air bag is sleeved outside the cannula, and an adjusting mechanism for adjusting the position of the cannula is arranged at the top of the cannula of the catheter body. According to the tracheal catheter capable of indicating the pressure of the cuff, the position of the cuff on the catheter can be adjusted according to use requirements, so that when the tracheal catheter is used under different conditions, catheters with different lengths do not need to be selected, the catheters do not need to be cut out, and the use convenience is improved.

It allows for non-invasive and, in principle, accurate measurement of blood pressure at the measurement site, and enables blood pressure measurement to be completed at a lower pressure and in a shorter time. [Solution] During the pressurization process, the DC component of the pressure Pc of the pressure cuff is subtracted from the pressure Ps of the sensing cuff to determine the pressure at the onset point PWa and the pressure at the peak point PWp of the pulse wave PW for each beat. The pressure PcA of the pressure cuff at the transition time tA when the pressure at the onset point PWa for each beat drops from a positive value to zero is determined as the diastolic blood pressure value DIA, and the maximum pulse wave amplitude AMmax is also determined. A past time point tB is searched for on the coordinate plane Q where the second curve C2 shows a positive value equal to the maximum pulse wave amplitude AMmax, and the pressure PcB of the pressure cuff at that past time point tB is determined. The difference obtained by subtracting PcB from PcA is determined as the pulse pressure equivalent PP. The pulse pressure equivalent PP is added to the diastolic blood pressure value DIA to determine the systolic blood pressure value SYS.

A sphygmomanometer according to the present invention includes a pump that supplies a fluid to a blood pressure measurement cuff, a pressure sensor that detects a pressure of the cuff, a first valve for regular measurement, and a second valve for emergency exhaust. A blood pressure measurement unit measures a blood pressure of a measurement target site by controlling operations of the pump and the first and second valves on the basis of the pressure of the cuff. The abnormality determination unit supplies the fluid to the cuff by the pump in a state where a closing instruction is given to the first valve and an opening instruction is given to the second valve, and determines whether or not there is an abnormality in an emergency exhaust function according to a degree of increase in the pressure of the cuff.

In the present invention, in a pressurization process, the DC component of the pressure of a pressing cuff (Pc) is subtracted from the pressure of a sensing cuff (Ps), and the pressure at a rising start point (PWa) and the pressure at a peak point (PWp) exhibited for each beat by a pressure pulse wave (PW) are obtained. The pressure of the pressing cuff (PcA) at the transition time point (tA) at which the pressure at the rising start point (PWa) for each beat falls from a positive value to a zero level is obtained as the diastolic blood pressure value (DIA), and the pulse wave amplitude maximum value (AMmax) is obtained. The past time point (tB), which is when a second curve (C2) has exhibited a value that is positive by the pulse wave amplitude maximum value (AMmax) on a coordinate plane (Q), is searched and found; and the pressure of the pressing cuff (PcB) at the past time point (tB) is obtained. The difference obtained by subtracting the pressure of the pressing cuff (PcB) at the past time point from the pressure of the pressing cuff (PcA) at the transition time point is obtained as the pulse pressure equivalent (PP). The pulse pressure equivalent (PP) is added to the diastolic blood pressure value (DIA) to obtain the systolic blood pressure value (SYS).

This invention relates to a three-stage measurement state machine method, device, and storage medium for home arteriosclerosis detection, belonging to the field of home health monitoring technology. To address the problem of poor measurement stability in home settings, this method utilizes dual-wavelength PPG and multi-cuff pressure waveforms for collaborative measurement in a home environment, dividing the detection process into three stages: pre-measurement stability assessment, in-measurement dynamic control, and post-measurement recovery analysis. Stage A determines the stability window based on PPG quality and stability; Stage B calculates quality control indicators in real time and performs gating control during cuff inflation and deflation, outputting indicators such as baPWV, ABI, and blood pressure; Stage C continues to collect PPG after depressurization and calculates recovery indicators, generating interpretation labels and retest suggestions. This invention improves the stability and reliability of home arteriosclerosis detection results.

A blood pressure measuring device is provided with: a cuff wound around a portion to be measured; a pressure detection unit that detects cuff pressure; a pressure control unit that controls the cuff pressure; a blood pressure calculation unit that performs a blood pressure calculation process on the basis of the cuff pressure; and a winding strength determination unit that performs a winding strength determination process for determining the winding strength of the cuff, and the pressure control unit performs a constant pressure control for maintaining the cuff pressure at a constant target pressure value from the start of the pressurization of the cuff pressure to the end of the winding strength determination process, and performs a constant pressure control for maintaining the cuff pressure at a constant target pressure value from the start of the pressurization of the cuff pressure to the end of the winding strength determination process. And a constant-speed pressurization control for pressurizing the cuff pressure at a constant speed in order to calculate the blood pressure is performed after the completion of the winding strength determination processing, and the winding strength determination unit determines the winding strength in the pressure constant control.