55results about How to "Accurate blood pressure" patented technology

Disclosed are blood pressure measuring apparatus and method, in which a blood pressure measuring posture of a person to be examined is calculated on the basis of signals that are measured by an inclination measuring unit, so as to guide the person to be examined to maintain a reference measuring posture. When it is confirmed that the person to be examined maintains the reference measuring posture, blood pressure is measured on the basis of a measured living body signal of the person to be examined. By this disclosure, since the blood pressure measuring posture of the person to be examined can be correctly guided by inclination sensors, the person to be examined can accurately measure the blood pressure using a noninvasive and a nonpressurized method.

A blood-pressure estimating apparatus, including a pulse-wave detecting device which detects a pulse wave from a portion of a living subject, a blood-pressure measuring device which includes an inflatable cuff adapted to be worn on the portion of the subject and measures, with the cuff, a diastolic blood pressure and a systolic blood pressure of the portion of the subject, and a mean-blood-pressure estimating device which converts, based on a minimum magnitude and a maximum magnitude of the pulse wave detected by the pulse-wave detecting device and the diastolic and systolic blood pressure measured by the blood-pressure measuring device, a magnitude of a gravity center of an area defined by the pulse wave into an estimated mean blood pressure of the portion of the subject.

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 present invention provides methods and apparatuses that can provide measurement of analytes such as glucose with a variety of sensors in connection with hemodynamic monitoring. Some embodiments of the present invention enable the use of a single arterial access site for automated blood glucose measurement as well as hemodynamic monitoring. Some embodiments of the present invention can reduce or eliminate nuisance hemodynamic alarms. Some embodiments of the present invention can provide hemodynamic monitoring during an automated analyte measurement process. An example apparatus according to the present invention comprises a blood access system, adapted to remove blood from a body and infuse at least a portion of the blood back into the body. Such an apparatus also comprises an analyte sensor, mounted with or integrated into the blood access system such that the analyte sensor measures the analyte in the blood that has been removed from the body by the blood access system.

In wrapping a blood pressure measurement cuff enclosing therein a bladder, which is inflated when supplied with air, around a region for measurement, first, a predetermined amount of air is supplied to the bladder and then enclosed therein. Then, the blood pressure measurement cuff is wrapped around the region for measurement of a subject for the purpose of measuring his/her blood pressure. During this wrapping process, relative variations in the pressure in the bladder are sequentially detected. The time period in which the detection results indicate that the variation has not reached a predetermined threshold value, the wrapping proceeds. When the detection results indicate that the variation has reached the predetermined threshold value, the wrapping is terminated.

The invention discloses a non-invasive type continuous blood pressure detecting method, equipment and device, wherein the method comprises: acquiring signals of a first radio frequency sensor and a second radio frequency sensor, wherein the first radio frequency sensor and the second radio frequency sensor are respectively arranged at the positions of two different superficial arteries of users; acquiring pulse wave conduction time according to the signals, wherein the pulse wave conduction time is used to obtain the blood pressure value of the users in a preset manner; controlling an inflatable cuff to increase pressure to obtain the blood pressure of the users measured by the inflatable cuff; correcting the preset manner according to the blood pressure of the users and the pulse wave conduction time; measuring the blood pressure value of the users by using the pulse wave conduction time and corrected preset manner. According to the non-invasive type continuous blood pressure detecting method, equipment and device, the technical problem that the existing non-invasive type continuous blood pressure measurement technique has the inaccurate measurement result is solved.

The invention provides a continuous blood pressure measurement method based on multi-parameter fusion. In addition to comprehensively considering blood pressure calibration by using the pulse wave transmission time, the method also considers the maximum value a01 of a first-order derivative of the blood oxygen plethysmography which is in the period same as that of the electrocardiosignal, the time difference value a2 of two systolic-phase peak points in two adjacent periods, the time difference value a3 of two minimum-value points, the time difference value a4 of two diastole-phase peak points, the difference value a5 of two dicrotic incisure points, the amplitude a6 of the systolic-phase peak points, the amplitude a7 of the minimum-value points, the amplitude a8 of the diastole-phase peak points, the amplitude a9 of the dicrotic incisure points, the systolic area a10, the diastole area a11, the area a12 of the blood oxygen plethysmography, the area ratio a13, the difference a14 of two peak points in the same period, the difference a15 between the systolic-phase peak point and the minimum-value point in the same period, the rising time a16, the time increment a17, the growth coefficient a18 and the reflection coefficient a19. According to the eighteen parameters, a blood pressure model is established by the BP neural network, the blood pressure value is predicted according to the model, a correction module is provided, the blood pressure value is accurately predicted, and the variation trend of the blood pressure is approached.

Prior to blood pressure calculations, air is enclosed in a blood pressure measurement bladder to be wound and mounted around the region for measurement, in advance. By referring to the variation in the pressure therein, the circumferential length of the region for measurement is detected based on the variation in the pressure therein during the winding correction determination process for the region for measurement. Then, the process enters blood pressure measurement, and the blood pressure measurement bladder is pressurized or depressurized. The pressure in the blood pressure measurement bladder is detected. A blood pressure based on the detected pressure is calculated according to the circumferential length of the region for measurement which has been detected in advance.

An electronic device includes a first sensor, a camera, and a processor functionally connected to the first sensor and the camera, wherein the processor is configured to acquire a first biometric signal through the first sensor and a second biometric signal through the camera at a first location, acquire a third biometric signal through the first sensor and a fourth biometric signal through the camera at a second location, and determine a blood pressure based on the first biometric signal and the second biometric signal acquired at the first location and the third biometric signal and the fourth biometric signal acquired at the second location.

A blood pressure measurement apparatus includes: a detector, operable to detect a first pulse, a second pulse prior to the first pulse and a third pulse prior to the second pulse under the same pressure; a first distinguisher, operable to distinguish whether waveforms of the first and second pulses are substantially identical with each other; a second distinguisher, when the waveforms are not substantially identical with each other, operable to distinguish whether parameters of the first, second and third pulses meet a condition corresponding to arrhythmia; a determiner, operable to determine the first and second pulses to be pulse waves when the waveforms are substantially identical with each other, and operable to determine the first, second and third pulses to be pulse waves when the parameters meet the condition; and a calculator, operable to calculate a blood pressure value based on the pulse waves.

An inflatable cuff for blood pressure measurement includes a first inflatable bag which is inflatable to press an arterial vessel of a body portion of a living subject and stop flow of blood in the arterial vessel which the inflatable cuff is adapted to be wound around the body portion; a second inflatable bag for sensing a pulse wave propagating along the arterial vessel, which is supported by the inflatable cuff such that the second inflatable bag is located inside a downstream-side portion of the first inflatable bag in the direction of the blood flows in the arterial vessel, and which as a dimension as measured in the direction that is smaller than a dimension of the first inflatable bag as measured in said direction; and a fluid-filled bag which is located between the second inflatable bag and the body portion and which is filled with incompressible fluid.

A non-invasive blood pressure system is disclosed herein. The non-invasive blood pressure system includes a pressure transducer configured to obtain pressure data comprising a transient baseline effects component. The non-invasive blood pressure system also includes a processor adapted to receive the pressure data from the pressure transducer. The processor is configured to generate a transient baseline effects model, and to implement the transient baseline effects model to at least partially remove the transient baseline effects component of the pressure data. The removal of the transient baseline effects component from the pressure data eliminates a potential source of error and thereby enables a more accurate blood pressure estimate.

Novel and advantageous systems, devices, and methods for pulse wave velocity (PWV) imaging that enable precise central blood pressure (BP) estimation are provided. A multi-sensor array can provide two-dimensional PWV, thereby achieving the PWV imaging and precise central BP estimation. The multi-sensor array can be integrated in daily objects, such as clothing or a bed, which results in noninvasive, continuous, low-cost monitoring of BP that is easy to use and does not require a medical professional. Electrocardiogram imaging, photoplethysmogram imaging, and monitoring for other physiological parameters such as heart rate, SpO₂, BP, and respiration, can also be achieved.