543 results about "Blood pressure monitoring" patented technology

The invention provides a system and method for monitoring blood pressure. The system includes a cuff-free non-invasive portable blood pressure monitoring device, a processor configured to process in real-time signals obtained by the portable blood pressure device to produce one or more processing products, and a portable monitor having a display displaying in real-time one or more of the processing products. In the method of the invention, a blood pressure signal is obtained from a cuff-free non-invasive portable blood pressure monitoring device. Signals obtained by the portable blood pressure device are processed in real-time to produce one or more processing products that are displayed in real-time on a display of a portable monitor. The method and system of the invention may be used in the management of hypertension.

A blood-pressure monitor, including a blood-pressure measuring device including a cuff, an information obtaining device which iteratively obtains, from a living subject, physical information which changes with change of blood pressure of the subject, a measurement starting device for starting a measurement of the blood-pressure measuring device, when a subsequent piece of information obtained by the obtaining device after the measuring device has measured a last blood pressure of the subject in a last measurement thereof has been deviated by not less than a predetermined amount from an initial piece of information obtained by the obtaining device when the measuring device measured the last blood pressure of the subject, a display device which displays a graph representing the pieces of information obtained by the obtaining device, and a control device which controls the display device to display the graph representing the initial piece of information and each one of subsequent pieces of information iteratively obtained by the obtaining device after the measuring device has measured the last blood pressure of the subject, so that the initial piece of information and the each one subsequent piece of information can be compared with each other.

Systems and methods for monitoring intravascular pressure of a patient. The system includes a pressure sensor and catheter assembly having a pressure sensor portion and a transdermal catheter portion. The transdermal catheter portion has a fluid filled lumen and a distal barrier to maintain patency. A transmitter unit may be connected to the pressure sensor portion via a lead. The transmitter unit transmits pressure data to a remote receiver unit that may communicate (directly or indirectly) with a cable management device, a data acquisition device, a monitoring instrument, a computer, a modem, a telecommunication line, a network, etc. In addition, the system may include means to correct for pressure variations due to any difference in elevation between the sensor assembly and the heart.

A blood pressure monitoring apparatus which continuously estimates and monitors the blood pressure by using the pulse wave propagation time can accurately estimate the blood pressure. While an estimated blood pressure is continuously calculated by using the pulse wave propagation time, the correlation between the pulse wave propagation time and the interval between feature points contained in two consecutive heart beat waveforms of an electrocardiogram is monitored. If the correlation is reversed, the blood pressure is actually measured, and the estimated blood pressure is corrected on the basis of the difference between the estimated blood pressure and actually measured blood pressure.

A monitoring device (10), method and system are disclosed herein. The monitoring device (10) utilizes a vital sign monitor (16) to determine a plurality of vital signs of the user. The vital sign monitor (16) preferably comprises a light source (3) and photodetector (31) in communication with a pulse oximetry circuit (35).

Ultrasound is used to provide input data for a blood pressure estimation scheme. The use of transcutaneous ultrasound provides arterial lumen area and pulse wave velocity information. In addition, ultrasound measurements are taken in such a way that all the data describes a single, uniform arterial segment. Therefore a computed area relates only to the arterial blood volume present. Also, the measured pulse wave velocity is directly related to the mechanical properties of the segment of elastic tube (artery) for which the blood volume is being measured. In a patient monitoring application, the operator of the ultrasound device is eliminated through the use of software that automatically locates the artery in the ultrasound data, e.g., using known edge detection techniques. Autonomous operation of the ultrasound system allows it to report blood pressure and blood flow traces to the clinical users without those users having to interpret an ultrasound image or operate an ultrasound imaging device.

The present invention provides a system for monitoring blood pressure that preferably includes: 1) a blood-pressure monitor featuring a measuring component that generates blood-pressure information and a first short-range wireless component configured to wirelessly transmit the blood-pressure information; 2) a mobile device featuring a chipset that includes i) an embedded second short-range wireless component configured to receive the blood-pressure information; and ii) a long-range wireless component configured to transmit the blood-pressure information over a wireless network; and 3) a computer system configured to receive and display the blood-pressure information.

The apparatus and methods of the present invention provide a non-invasive measurement of blood pressure with a frequency that approximates a continuous measurement. Blood pressure measurement provides information that is both clinically and diagnostically significant. In accordance with an aspect of the present invention, a method for providing a non-invasive measurement of blood pressure, includes obtaining a first input signal and a second input signal indicative of occlusive measurements of systolic blood pressure and diastolic blood pressure, respectively; tracking a signal indicative of pulse pressure; continuously measuring a third signal indicative of mean blood pressure; and processing the signals to obtain a measurement indicative of systolic and diastolic blood pressure, wherein at least a portion of the measurement indicative of systolic and diastolic blood pressure is continuous. The second input signal indicative of diastolic blood pressure is analyzed to identify a maximum amplitude of the signal, the maximum amplitude being indicative of the diastolic blood pressure measurement.

The present invention provides non-invasive devices, methods, and systems for determining a pressure of blood within a cardiovascular system of a user, the cardiovascular system including a heart and the user having a wrist covered by skin. More particularly, the present invention discloses a variety of wrist-worn devices having a variety of sensors configured to non-invasively engage the skin on the wrist of the user for sensing a variety of user signals from the cardiovascular system of the user. Generally, approaches disclosed herein may passively track blood pressure values without any interaction required on the part of the user or may allow for on demand or point measurements of blood pressure values by having a user actively interact with the sensors of the wrist-worn device. Approaches disclosed herein further allow for absolute blood pressure values to be determined directly without the requirement for any periodic calibrations or for relative blood pressure values to be tracked so as to provide relative blood pressure indices.

Ultrasound is used to provide input data for a blood pressure estimation scheme. The use of transcutaneous ultrasound provides arterial lumen area and pulse wave velocity information. In addition, ultrasound measurements are taken in such a way that all the data describes a single, uniform arterial segment. Therefore a computed area relates only to the arterial blood volume present. Also, the measured pulse wave velocity is directly related to the mechanical properties of the segment of elastic tube (artery) for which the blood volume is being measured. In a patient monitoring application, the operator of the ultrasound device is eliminated through the use of software that automatically locates the artery in the ultrasound data, e.g., using known edge detection techniques. Autonomous operation of the ultrasound system allows it to report blood pressure and blood flow traces to the clinical users without those users having to interpret an ultrasound image or operate an ultrasound imaging device.

The invention provides a system and method for measuring vital signs (e.g. SYS, DIA, SpO2, heart rate, and respiratory rate) and motion (e.g. activity level, posture, degree of motion, and arm height) from a patient. The system features: (i) first and second sensors configured to independently generate time-dependent waveforms indicative of one or more contractile properties of the patient's heart; and (ii) at least three motion-detecting sensors positioned on the forearm, upper arm, and a body location other than the forearm or upper arm of the patient. Each motion-detecting sensor generates at least one time-dependent motion waveform indicative of motion of the location on the patient's body to which it is affixed. A processing component, typically worn on the patient's body and featuring a microprocessor, receives the time-dependent waveforms generated by the different sensors and processes them to determine: (i) a pulse transit time calculated using a time difference between features in two separate time-dependent waveforms, (ii) a blood pressure value calculated from the time difference, and (iii) a motion parameter calculated from at least one motion waveform.

A blood pressure monitoring system includes a blood pressure measurement device for measuring blood pressure using a cuff, a memory for storing an externally inputted pulse wave propagation time fluctuation threshold, a time interval detection reference point detection section for detecting a time interval detection reference point in a pulse wave on the side of aortae of a living organism, a pulse wave detection section for detecting a pulse wave on the side of peripheral blood vessels appearing with a time lag with respect to the pulse wave on the side of aortae, a pulse wave propagation time measurement section for measuring a pulse wave propagation time based on respective detected outputs from the time interval detection reference point detection section and the pulse wave detection section, an operation device for calculating a pulse wave propagation fluctuation from two measured pulse wave propagation times, a judgment device for judging whether or not the calculated pulse wave propagation time fluctuation exceeds the pulse wave propagation time fluctuation threshold read from the memory, and a control device for controlling the blood pressure measurement device based on an output of the judgment device so that the blood pressure of a subject is measured using the cuff.

The present invention generally relates to blood pressure monitoring. In some embodiments, methods and devices of measuring a mean arterial pressure are provided and / or monitoring blood pressure changes. A wrist-worn device may include a plurality of sensors backed by a plurality of actuators. Subsets of the plurality of sensors may be selectively actuateable against a wrist of a user using one or more of the plurality of actuators. A preferred sensor and location may be identified based on pressure signals received from each of the sensors. In some embodiments, devices may use a fluid bladder coupled with piezoelectric film sensors. A fluid bladder pressure sensor may be used to calibrate the piezoelectric film signal to provide a static and dynamic pressure reading. In yet another embodiment, a mean arterial pressure may be calculated by processing a swept pressure signal obtained as a sensor is swept through different heights.

Certain embodiments of the present invention are related to an implantable monitoring device to monitor a patient's arterial blood pressure, where the device is configured to be implanted subcutaneously. The device includes subcutaneous (SubQ) electrodes and a plethysmography sensor. Additionally, the device includes an arterial blood pressure monitor configured to determine at least one value indicative of the patient's arterial blood pressure based on at least one detected predetermined feature of a SubQ ECG and at least one detected predetermined feature of a plethysmography signal. Alternative embodiments of the present invention are directed to a non-implantable monitoring device to monitor a patient's arterial blood pressure based on features of a surface ECG and a plethysmography signal obtained from a non-implanted sensor.

In a clinical and physiological abnormality monitoring apparatus, and blood pressure monitoring apparatus detects a blood pressure abnormality and the like of a body by employing a pulse wave signal. A frequency analysis is carried out with respect to a pulse wave signal, while this pulse wave signal corresponds to time sequential data of pulse waves. As a result, both a C-frequency component indicative of a fluctuation component of a base line of the pulse wave signal, and also an A-frequency component representative of the respective pulse waves are acquired. A ratio C / A of power of a peak contained in the C-frequency component with respect to power of a peak contained in the A-frequency component is calculated to determine abnormality of the blood pressure.

A method and system for use in measuring the endothelial dysfunction utilizing flow mediated dilation and determining arterial health of a patient. The system includes a non-invasive blood pressure monitor, an ultrasound system and a pulse oximeter monitor that all communicate with each other to perform the flow mediated dilation. Initially, the ultrasound transducer, blood pressure cuff and pulse oximeter sensor are positioned on an arm of the patient. The blood pressure cuff is inflated to occlude an artery for an occlusion period. Following the occlusion period, the ultrasound system is automatically signaled to begin determining a parameter of the artery, such as diameter, and the flow rate of blood through the artery without any operator intervention. At the same time, the pulse wave velocity PWV is calculated between the ultrasound transducer and the finger probe of the pulse oximeter following the occlusion period. Based upon the detected characteristics of the artery before and after occlusion, as well as the PWV, the system can determine the endothelial dysfunction and arterial health of the patient.

The present invention describes a system and method for continuous monitoring of central (aortic) and peripheral Blood Pressure. The system includes a fully mobile, non-invasive, continuous blood pressure monitoring system that includes one or more Biostrip devices affixed on a user, coupled with an application running on a computing device, which is further connected to a web server in the cloud. The system performs various computations on the Biostrip device, or on the gateway device (Smartphone or Smartwatch), or on the Cloud, and provides the user and authorized third parties with various insights about the blood pressure levels of the user. Further, the system enables the user to receive biofeedback training for controlling hypertension, and schedule online appointments, pay online for such appointments, share data the data securely to obtain insights.

The invention provides a non-invasive continuous blood pressure measurement method based on deep learning. The measurement method mainly comprises a pulse wave signal preprocessing method, a deep neural network model establishing method and a blood pressure measuring method. Pulse wave signals input to a neural network are subjected to preprocessing, filtering and noise reduction and normalizationprocessing, so that an established model is more accurate and has better adaptability. The method uses a deep neural network, subjective feature extraction and complex mathematical modeling problemsare avoided, and the network can conduct blood pressure measurement on different forms of pulse waves of different individuals through a large number of data training networks and can be applied to awide range of blood pressure prediction scenarios after the network is trained for once. Compared with the prior art, the objectivity is high, the model robustness is strong, and the measurement method is suitable for integration in home medical monitoring equipment and is also suitable for blood pressure monitoring of a wearable device.

Disclosed is a blood-pressure monitor, which comprises signal generation means for generating a breathing-guidance signal during a blood-pressure measurement, and display means for displaying an indication for guiding breathing based on the breathing-guidance signal. The blood-pressure monitor of the present invention can display an indication for guiding resting breathing during a blood-pressure measurement so as to perform a stable blood-pressure measurement.

In blood pressure monitoring apparatus which continuously estimates and monitors blood pressure by using the pulse wave propagation time, blood pressure fluctuation can be accurately estimated. If both blood pressure estimated from the pulse wave propagation time and a waveform parameter obtained from the accelerated pulse wave have abnormal values, it is determined that the blood pressure is truly fluctuating, and blood pressure measurement by another method, e.g., blood pressure measurement using a cuff is performed.

A blood pressure monitoring system that includes a compact housing that contains a pneumatic circuit that is removably attached to an inflatable cuff by a hoseless connector so that the cuff can be inflated and deflated to provide blood pressure readings that are detected by a pressure sensor. A controller is also contained in the housing which controls the circuit activities and records blood pressure related data. The controller is linked via a bidirectional communication system with a processor that is contained in a host station which programs the controller and collects and records blood pressure related data. The communication system also allows the monitoring system to communicate over a wider network with other remote stations.

Tools and techniques for estimating and / or predicting a patient's current and / or future blood pressure. In some cases, the tools will analyze physiological data captured from the patient against a model of blood pressure values to estimate / predict the patient's blood pressure value. In particular cases, derived parameters, such as a patient's compensatory reserve index (“CRI”) can be analyzed against such models, while in other cases, data captured from sensors can be directly analyzed against such models.

The invention discloses an organism-falling detection device and method. The device comprises a falling motoring unit, a blood-pressure monitoring unit, a body temperature monitoring unit and a micro-processing unit, wherein the falling motoring unit is used for collecting the acceleration information of an organism; the blood-pressure monitoring unit is used for collecting the blood pressure and / or pulse information of the organism; the body temperature monitoring unit is used for collecting and processing the body temperature information of the organism; and the micro-processing unit is used for controlling the falling motoring unit to start and receive the acceleration information of the organism, analyzing and judging the acceleration information, starting the blood-pressure monitoring unit and the body temperature monitoring unit according to a judged result, detecting and analyzing the blood pressure and / or pulse information and the body temperature information of the organism, and generating falling alarm information or disease alarm information according to a processed result. According to the device and the method, the type of falling can be accurately and effectively judged.

In blood pressure monitoring apparatus which continuously estimates and monitors blood pressure by using the pulse wave propagation time, blood pressure fluctuation can be accurately estimated. If both blood pressure estimated from the pulse wave propagation time and a waveform parameter obtained from the accelerated pulse wave have abnormal values, it is determined that the blood pressure is truly fluctuating, and blood pressure measurement by another method, e.g., blood pressure measurement using a cuff is performed.

The invention relates to a real-time blood pressure monitoring and timely remote service device with an acceleration transducer and a system thereof. The real-time blood pressure monitoring can be used for dynamically monitoring physiological parameters of human bodies such as blood pressure, heart rate and the like in real time, a pressure-frequency conversion method is used for converting a pressure signal into a frequency signal which has strong anti-interference capacity, thus enhancing the anti-interference capacity of the real-time blood pressure monitoring. An oscillography-based blood pressure measurement improvement algorithm effectively optimizes use of an internal memory space. The acceleration transducer can judge motion state of a tested person and control startup of blood pressure measurement to enhance measurement efficiency and save power. A GSM module sends monitoring data to a remote service platform, the heart rate data of the tested person are analyzed, and the system compares and selects the blood pressure data according to a preset heart rate variation threshold, removes abnormal blood pressure data, and stores the useful data. An intelligent signal analysis and processing program automatically analyzes the blood pressure data and sends alarm information to the tested person at proper time.

Ultrasound is used to provide input data for a blood pressure estimation scheme. The use of transcutaneous ultrasound provides arterial lumen area and pulse wave velocity information. In addition, ultrasound measurements are taken in such a way that all the data describes a single, uniform arterial segment. Therefore a computed area relates only to the arterial blood volume present. Also, the measured pulse wave velocity is directly related to the mechanical properties of the segment of elastic tube (artery) for which the blood volume is being measured. In a patient monitoring application, the operator of the ultrasound device is eliminated through the use of software that automatically locates the artery in the ultrasound data, e.g., using known edge detection techniques. Autonomous operation of the ultrasound system allows it to report blood pressure and blood flow traces to the clinical users without those users having to interpret an ultrasound image or operate an ultrasound imaging device.

A limb compression system for increasing the flow of venous blood in a patient comprises an inflatable cuff, a pump, a controller, and a pressure transducer. The system collects a signal from the pressure transducer indicative of the pressure in the cuff and uses the signal to determine the blood pressure of the patient. A method for providing patient cardiovascular support and monitoring of patient blood pressure is also herein disclosed.