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 invention discloses a multi-mode continuous blood pressure measurement device. The multi-mode continuous blood pressure measurement device comprises an electrocardio acquisition module used for acquiring electrocardio signals, an oscillography blood pressure acquisition module used for acquiring BP and a pulse wave acquisition module used for acquiring pulse wave signals. The multi-mode continuous blood pressure measurement device is characterized by further comprising a microprocessor used for processing the signals acquired by the electrocardio acquisition module, the oscillography blood pressure acquisition module and the pulse wave acquisition module, a first three-dimensional movement sensor is arranged in the electrocardio acquisition module, a second three-dimensional movement sensor is arranged in the oscillography blood pressure acquisition module, and the first three-dimensional movement sensor and the second three-dimensional movement sensor both comprise a three-dimensional acceleration sensor and a gyroscope. The invention further discloses a self-calibration method of the multi-mode continuous blood pressure measurement device.

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.

A sphygmomanometer with a cuff for use on a patient wrist, upper or lower arm incorporates an inflatable bladder and a support structure. The cuff is subdivided into two sections. The first section holds the bladder against an arterial side of the limb, while the second section abuts a non-arterial side of the limb and is mechanically coupled to the support structure. When the cuff is attached to the patient limb, the bladder is positioned to avoid receiving a gravitational force caused by the weight of the limb. Rather, the gravitational force is absorbed by the support structure in an interior area of the cuff removed from the bladder.

A blood pressure measuring apparatus, which measures a blood pressure of a living body, includes: a cuff-pressure control unit which controls a cuff pressure of a cuff that presses a part of the living body; an oscillation signal detection unit which detects an oscillation signal from the cuff pressure; a blood pressure specification unit which specifies systolic and diastolic blood pressures as the blood pressure of the living body from the oscillation signal; and a blood pressure determination unit which determines whether systolic and diastolic blood pressures are appropriate or not. The cuff-pressure control unit controls the cuff pressure to be inflated to a first set value, the blood pressure specification unit specifies the systolic and diastolic blood pressures based on a change of an oscillation signal that is detected by the oscillation signal detection unit when the cuff pressure is inflated to the first set value, and when the blood pressure determination unit determines that both the systolic and diastolic blood pressures are appropriate, the cuff-pressure control unit ends the inflating of the cuff pressure to release the cuff pressure.

In a blood pressure measuring device, a casing is held in both hands. A pair of electrocardiographic electrodes are respectively provided to allow contact with the hands holding the casing, and detect electrocardiographic signals through the hands. A pulse wave sensor is provided to allow contact with either of the hands holding the casing, and detects pulse wave signals through the hand. Based on these detected signals, a measuring section acquires measurement information including: a time difference between an electrocardiographic R wave and a pulse wave reference point; and a pulse wave amplitude. A calculating section calculates blood pressure using the measurement information. A display section displays the blood pressure. A measurement starting section enables the measuring section to start acquisition of the measurement information in a state in which contact is maintained between the hands holding the casing and the corresponding electrocardiographic electrodes and pulse wave sensor.

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.

A convenient, inexpensive wrist blood pressure gauge whereby a cuff can easily be adjusted to the height of the heart merely by adding a simple structure. A lenticular sheet (display body (14)) whose visible image varies according to an angle in relation to a sight line (S) of a measurement subject is provided to a wrist blood pressure gauge (1) worn on a wrist (Mt) of the measurement subject (M), wherein a specific image is visible to the eyes (Ma) of the measurement subject when the wrist is set at the correct height in relation to the heart (H), and a different image is visible to the eyes of the measurement subject when the wrist is not in an appropriate height range.

The invention discloses a blood pressure measuring method. According to the method, the principle that correlation between amplitude of blood oxygen volume pulse wave signals and continuous blood pressure is high is utilized, an expression between pulse wave transmission time and the blood pressure in the prior art and an expression between the amplitude of the blood oxygen volume pulse wave signals and the blood pressure are fit, the incidence relation among a continuous blood pressure waveform, pulse wave transmission time x and the amplitude y of characteristic value points is determined, and then an accurate blood pressure value is obtained.

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.

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 blood pressure monitor has a main body provided with an arm insertion portion having a throughhole and provided with a cylindrical cuff, that is provided with an elbow rest receiving an elbow of an arm inserted through and thus placed outside the arm insertion portion. The elbow rest is rotatably supported at a lower portion of a rear side of the main body by a support shaft to be positionally changeable between elbow supporting and unused positions and at the unused position it is accommodated by the main body upper than the support shaft. The elbow rest includes a proximal support, a distal support and an elbow support. When blood pressure is measured the elbow rest is set to take the elbow supporting position to receive an elbow placed outside the arm insertion portion. An advantage of a home blood pressure monitor can be maintained and accurate blood pressure measurement can also be obtained.

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.

Even when the measurement posture for seated and supine positions is determined on the basis of the same condition, it is inappropriate to determine whether the measurement position is correct or not.This blood pressure measurement device measures the blood pressure in seated and supine positions by determining, when a night (sleeping) blood pressure measurement mode is set, the measurement posture using a measurement posture determination unit, taking into account the height difference between the position of the blood pressure measurement device in the supine position and the position of the heart of a subject, and obtaining a blood pressure measurement.

The invention relates to a measuring structure of a sphygmomanometer, which can measure the blood pressure condition of a human body by using systolic pressure and diastolic pressure. The measuring structure comprises a control unit, a measuring unit, an inflation device, an air leakage device and a display device, wherein the control unit is connected with an operating device which can adjust the control unit so as to control the inflation device and the air leakage device to serve the measurement of the measuring unit; in addition, the measuring unit is connected with a pressure sensing device which can transmit the measurement result of the measuring unit to the control unit for processing and calculation, and the display unit displays the measurement result; when the inflation device is used for pressurization, the measuring unit can measure the systolic pressure and the diastolic pressure at the phase of pressurization; when the air leakage device acts for depressurization, the measuring unit can also measure the systolic pressure and the diastolic pressure at the phase of depressurization; and the control unit can calculate and compare the measurement result values of the systolic pressure and the diastolic pressure so as to provide a user with value information of the systolic pressure and the diastolic pressure and finally improve the measurement accuracy.

There is provided a device comprising a blood pressure sensor for sensing blood pressure and a method for controlling the device. An angle of the device with respect to the direction of gravity is determined (202) and a location of one or more features of the user holding the device is identified (204). A height of the blood pressure sensor relative to a heart level of the user is determined based on the determined angle of the device with respect to the direction of gravity and the identified location of the one or more features of the user (206). The device is controlled based on the determined height of the blood pressure sensor relative to the heart level of the user (208).