114 results about "Blood pressure change" patented technology

A method and apparatus are disclosed for using photoplethysmography to obtain physiological parameter information related to respiration rate, heart rate, heart rate variability, blood volume variability and/or the autonomic nervous system. In one implementation, the process involves obtaining (2502) a pleth, filtering (2504) the pleth to remove unwanted components, identifying (2506) a signal component of interest, monitoring (2508) blood pressure changes, monitoring (2510) heart rate, and performing (2512) an analysis of the blood pressure signal to the heart rate signal to identify a relationship associated with the component of interest. Based on this relationship, the component of interest may be identified (2514) as relating to the respiration or Mayer Wave. If it is related to the respiration wave (2516), a respiratory parameter such as breathing rate may be determined (2520). Otherwise, a Mayer Wave analysis (2518) may be performed to obtain parameter information related to the autonomic nervous system.

The invention relates to a physiologic parameter monitoring device comprising a sensor unit, a processing unit and a notification unit; the sensor unit is used for acquiring a biological signal from the surfaces of ears of a user; the processing unit is used for processing the biological signal and outputting physiologic parameters, such as heart rate, heart rate change rate, blood pressure, blood pressure change rate, degree of blood oxygen saturation and body temperature; and the notification unit issues the physiologic parameters in a visual or audio way. The physiologic parameter monitoring device continuously detects one or a plurality of items of physiologic signals and parameters for the user under the condition of not interfering with the daily activities of the user. A power supply of a piezoelectric device of the sensor unit supplies power for the sensor unit by utilizing the piezoelectricity and can be used as a switch of the device and reduce the reliance on to batteries.

The invention relates to an ambulatory blood pressure monitoring system for improving measuring accuracy and a monitoring method thereof, wherein the ambulatory blood pressure monitoring system for improving measuring accuracy comprises a single chip microcomputer, an ambulatory blood pressure collecting unit, a liquid crystal display screen display unit, a keyboard unit, a gravity induction unit, a motion induction unit, a temperature induction unit, a speech unit, a real-time clock unit and a communication unit, and the positions of the gravity induction unit and a sleeve band for measuring blood pressure are arranged in parallel. The monitoring method is that the ambulatory blood pressure monitoring system for improving measuring accuracy rectifies ambulatory blood pressure measuring valve according to the change of body positions of measured people, obtains an accurate blood pressure measuring value, marks motion state and environment temperature, displays an ambulatory blood pressure valve, the motion state and the environment temperature, enables doctors to know the change of blood pressure of the measured people in the round to comprehensively judge, and is beneficial for treatment of diseases.

A dialyzing apparatus includes a dialyzer which removes water from blood of a patient at a water-remove rate during a dialysis operation, a blood-pressure-change-related-information obtaining device which obtains a plurality of sorts of blood-pressure-change-related information each of which is related to a change of a blood pressure of the patient during the dialysis operation, and a water-remove-rate control device which controls the water-remove rate of the dialyzer, based on the plurality of sorts of blood-pressure-change-related information, according to a predetermined control manner.

The invention discloses a system for measuring blood pressure by using psychological state verification. According to one embodiment, the position of an artery on a human's skin is determined, and a tension pressure sensor is positioned on the position of the artery for measuring blood pressure so as to obtain pressure pulse data of an examination object. When in operation according to the embodiment, a measuring logic of a measuring verification system can uses the pressure pulse data to extract blood pressure data, heart rate data, blood pressure changing data, and heat rate changing data. The aforementioned data can be used to identify whether the blood pressure measuring appropriately and accurately reflect the conditions of the examination object.

Disclosed is a method for estimating stress and strain of coronary artery blood vessel wall. According to the technical scheme, the method includes: firstly, acquiring a motion field of blood vessel wall tissues generated with blood pressure changes from an IVUS (intravascular ultrasound) gray scale image sequence; and secondly obtaining stress and strain values of points on blood vessel wall cross-section images of each frame. The stress and strain values of the blood vessel wall are directly obtained from the conventional IVUS gray scale image sequence, the algorithm is simple, and application conditions of the method are lowered. By the method compared with the methods based on radiofrequency signal analysis, strain values (including two master strains and a shear strain) of optional-direction points on the blood vessel cross section of each frame image can be calculated, elasticity of the blood vessel wall and plaque tissues can be reflected more comprehensively, and more reliable basis is provided for the analysis on pathogenesis of coronary arterial atherosclerosis, the estimation on vulnerability of atherosclerotic plaque, the prediction on development tendency of the atherosclerotic plaque and the like.

The embodiment provides a method and a device for measuring and analyzing blood pressure. The method comprises the following steps: measuring and obtaining the measuring results and the measuring time of a user's blood pressure for many times; carrying out splattering analysis according to the measuring results and the measuring time of the user's blood pressure for many times so as to judge the blood pressure level of the user; and performing broken line analysis according to the measuring results and the measuring time of the user's blood pressure for many times so as to observe the change tendency of the user's blood pressure in a period of time. On the basis of realizing user management, the measuring results are stored respectively for the users, and two blood pressure analysis modes comprising splattering analysis and broken line analysis are provided. According to the splattering analysis, hypertension knowledge matched with the user information can be automatically retrieved from a hypertension knowledge base. According to the broken line analysis, the change tendency of the user's blood pressure in a period of time can be seen clearly, knowledge of the blood pressure change tendency and medicine use can be automatically retrieved from the hypertension knowledge base, and the user is guided to use medicines reasonably and regulate blood pressure in daily life.

The non-invasive sphygmomanometer analyzer includes one dynamic blood pressure simulator to simulate the blood pressure change of human body and to apply one dynamic blood pressure to the air bog of the sphygmomanometer adaptor and one standard pressure measuring device for the dynamic analysis of sphygmomanometer.

A blood pressure measurement apparatus for measuring blood pressure in a predetermined period includes a blood pressure measuring unit for measuring the blood pressure of a subject, an information acquiring unit for acquiring information that is related to variation in blood pressure and changes in a time-series in the predetermined period, a determining unit for determining whether or not the information acquired by the information acquiring unit satisfies a predetermined condition, and a trigger output unit for, in a case where the determining unit determines that the predetermined condition is satisfied, causing the blood pressure measuring unit to start and execute blood pressure measurement. The predetermined condition is expressed as a function of time that varies and is measured in the predetermined period.

The invention provides a method for evaluating the automatic regulation function of cerebral blood flow of an individual. The method comprises the following steps that 1, external counterpulsation operation is applied to the individual; 2, continuous blood pressure monitoring and cerebral blood flow speed monitoring are conducted on the individual before the external counterpulsation operation, during the external counterpulsation operation and after the external counterpulsation operation; 3, blood pressure changes and cerebral blood flow speed changes, responding to the external counterpulsation operation, of the individual are recorded, and the automatic regulation function of the cerebral blood flow of the individual is evaluated on the basis of the changes. The invention further provides a system for implementing the method.

The invention discloses a lie detection method and device. The method comprises the following steps that S1 a mobile phone sends ultrasonic signals to a detected user and receives reflected ultrasonic signals; S2 the mobile phone processes the received ultrasonic signals and converts to obtain heartbeat frequency, respiratory frequency, blood pressure changes and temperature changes; and S3 the mobile phone judges whether the detected user tells a lie or not according to the heartbeat frequency, the respiratory frequency, the blood pressure changes and the temperature changes, and the mobile phone raises the alarm when the detected user tells a lie. The lie detection method and device can use the mobile phone to detect whether the user tells a lie or not, and the lie detection device is simple in structure, small in size, simple in operation and convenient to use.

The invention provides a dynamic physical examination method and an automatic corporeity evaluation system. The dynamic physical examination method includes two modes: 1) measuring blood oxygen, blood pressure and heart rhythm by enabling a person to hold breath; 2) measuring the blood oxygen, the blood pressure and the heart rhythm by enabling the person to continuously squat. Normal value of a static examination is used as a reference base line of a dynamic physical examination performed by using the dynamic physical examination method, and therefore heart and lung functions and a circulatory system of the person under pressure are evaluated. A breath holding examination aims at examining high value of the blood pressure and heart rhythm changes under the circumstance of organ tissue ischemia, and a continuous squatting examination aims at examining high value of the heart rhythm and blood pressure changes under the circumstance of exercise. The automatic corporeity evaluation system analyzes corporeity and potential disease risk of the person by combining dynamic physical sign measurement value with static physical examination normal value and using front end embedded software and background big data cloud computing. Then, corresponding health advice and corresponding medical service recommendation are provided.

The invention provides a novel index for testing the partial elasticity of the artery, belonging to the field of cardiovascular mechanics and having great significance to the related basic research and clinical work. At present, a variety of indexes are used for reflecting the elasticity of the whole blood vessel, but no index is available to reflect the partial elasticity of the blood vessel, and the basic research and the clinical work have an urgent need for a novel index for measuring the partial elasticity of the artery. The novel index provided by the invention fills the blank. The novel index is obtained by measuring the stress of the blood vessel wall on different parts and in different directions (circumferential direction and longitudinal direction) when the blood vessel wall is subjected to one blood-pressure change through deducing and calculating according to the Laplace's law and essentially reflects that the force (pulse pressure) needed by the partial blood vessel wall to generate a certain stress in a certain direction represents the elasticity of the partial blood vessel. The novel index can be also used for directly calculating the Young modulus of the partial blood vessel.

The invention relates to a blood vessel physiological parameter measurement method and device, a computer device and a storage medium. The method comprises the steps: obtaining a first reference ultrasonic image sequence of a to-be-measured blood vessel when the to-be-measured blood vessel is not loaded and at least one group of ultrasonic image sequences of the to-be-measured blood vessel when the to-be-measured blood vessel is loaded with a preset load, and ranking to obtain a target first reference ultrasonic image sequence and at least one group of target ultrasonic image sequence in a cardiac cycle; obtaining a displacement field sequence group according to the target first reference ultrasonic image sequence and the at least one group of target ultrasonic image sequence; and inputting the preset load into a preset to-be-measured blood vessel finite element model, simulating and matching the displacement field sequence group, to obtain a cardiac cycle blood pressure change waveform and a relationship between the blood vessel elasticity modulus and the cardiac cycle blood pressure. According to the method, the blood pressure change waveform of the cardiac cycle and the blood vessel elasticity modulus can be obtained at the same time, and the blood vessel physiological parameter measurement efficiency is improved.

In an ultrasonic blood pressure meter 1, changes in blood pressure in a peripheral artery measured by a blood pressure meter 2 are input from an input unit 40. A blood vessel diameter measuring unit 120 measures changes in the blood vessel diameter of a central artery using ultrasound. A calibrating unit 130 calibrates a parameter related to a blood pressure estimation process for estimating central blood pressure from the blood vessel diameter of the central artery, using results of measurement by the blood pressure meter 2 and the blood vessel diameter measuring unit 120 during a given correspondence period, of a one-heartbeat period, in which the relationship between the blood vessel diameter of the central artery and the blood pressure in the peripheral artery corresponds to the relationship between the blood vessel diameter of the central artery and the central blood pressure.