Various embodiments include methods and devices for measuring blood pressure. Various embodiments may include receiving, from one or more arterial measurement sensors, a pulse waveform representing arterial pressure as a function of time for each pulse of a series of blood pressure pulses. The series of blood pressure pulses may be correlated to arterial distension at a measurement location of the arterial measurement sensors on a subject's body. One or more elevations of the measurement location may be received from one or more elevation sensors. At least one pulse in the series of pulses may be identified that represents a transitional pulse based on one or more characteristics of the at least one pulse. A diastolic blood pressure may be determined based on the at least one identified transitional pulse and elevation measurements that correspond to the one identified pulse.

An apparatus and method for measuring at least two patient parameters is provided. A first cuff includes a first inflatable bladder, a first light emitting device and a first sensor that senses light data for use in calculating at least two patient parameters. A second cuff includes a second inflatable bladder, a second light emitting device and a second sensor that senses light data for use in calculating the at least two patient parameters. A controller is coupled the first and second sensors and when the controller causes the bladder of one of the first and second cuffs to inflate, the sensor of the one of the first and second cuffs sensing first light data used in determining a first of the at least two patient parameters and the sensor of the other of the one of first and second cuffs simultaneously senses second light data used in determining of a second of the at least two patient parameters.

A method for inflating a cuff of a non-invasive blood pressure measurement apparatus includes obtaining a plurality of pressure values of the cuff at a plurality of time points; calculating a first inflation speed parameter on the basis of the plurality of pressure values, a plurality of target pressure values of the cuff at the plurality of time points and a plurality of inflation speed parameters corresponding to each time interval between every two adjacent time points of the plurality of time points; and inflating the cuff at a speed corresponding to the first inflation speed parameter from a last time point of the plurality of time points to a first time point after the plurality of time points. In this way, uniform cuff inflation can be achieved when the target pressure values of the cuff change uniformly, so that the over-voltage phenomenon or the condition of low-speed cuff inflation can be reduced or eliminated. By introducing the plurality of pressure values, even if there is a big error in a cuff pressure value obtained at a certain time point, it is still possible to control the cuff inflation correctly.

Disclosed is a finger cuff connectable to a patient's finger to be used in measuring the patient's blood pressure utilizing the volume clamp method. The finger cuff may comprise: a finger cavity to receive the patient's finger; a micro-laser and a detector to measure a pleth signal; a bladder mountable within the finger cavity, wherein the patient's finger received in the finger cavity abuts against the bladder; and a processor. The processor may be configured to control pressure applied by the bladder to the patient's finger based upon measuring the pleth signal received from the detector and the micro-laser to keep the pleth signal approximately constant to replicate the patient's blood pressure to implement the volume clamp method and to measure the patient's blood pressure.

The invention describes a measuring system for the continuous non-invasive determination of blood pressure at one or more fingers. The fingers chosen for measurement and the adjacent parts of the palm rest on a supporting surface of a housing, which has the shape of a computer mouse. Inside the housing of the “CNAP Mouse”, i.e. underneath the supporting surface for the hand, the pressure generating system is located. The finger sensors are mounted on the supporting surface for the hand. The forearm and the back of the hand are left free and may be used to place intra-venous or intra-arterial access elements. Since the hand will rest on the supporting surface motion artefacts are largely avoided. Tilting or turning of the sensors is hardly possible since the fit of the sensors and thus the coupling of light and pressure are optimized.

Methods and related devices 100 for obtaining the blood pressure of a person in two different ways. The first way comprising steps of providing a light source 101, and an optical sensor 103 configured to detect light from the light source 101 which has propagated through the wrist of a wearer of such a device 100. The amount of light propagating through the wrist depends on the amount of blood in the wrist. Blood pressure is then observed by monitoring the difference in the amplitude of blood pulsation within the wrist when the wrist is lifted above heart level, and when the wrist is lowered below heart level. The second way comprising mathematically analysing light transmission signals though a body part of the same person. Blood pressure readings obtained by the first way are used to calibrate blood pressure readings by the second way.

The present invention is related to a cardiovascular monitoring device including an inflatable cuff for surrounding a limb of a user, at least a first and a second electrodes, a controlling circuitry with a processor accommodated in a housing, and a display element. The controlling circuitry is configured to perform a blood pressure measurement through controlling a pressure inside the inflatable cuff, and perform an electrocardiogram measurement by using the electrodes. The processor is also configured to provide a diastolic blood pressure and a systolic blood pressure when the blood pressure measurement is performed, and to provide a heart rhythm information when the electrocardiogram measurement is performed. Further, for achieving a better and more stable contact between the electrodes and the user's skin, the present invention provides an improved structure with electrodes arranged thereon based on the conventional blood pressure monitor.

Novel tools and techniques are provided for assessing, predicting and/or estimating a probability that a patient is bleeding, in some cases, noninvasively. In various embodiments, tools and techniques are provided for implementing rapid detection of bleeding of the patient or implementing assessment, prediction, or estimation of a probability of bleeding of the patient following injury, in some instances, in real-time before, during, and after fluid resuscitation. According to some embodiments, one or more sensors might monitor physiological data of the patient before, during, and after resuscitation following injury. A computer system might receive and analyze the physiological data, and might estimate a probability that the patient is bleeding, based at least in part on the analyzed physiological data. An indication of at least one of an assessment, prediction, or estimate of a probability that the patient is bleeding may then be displayed on a display device.

Disclosed herein is a blood pressure measuring device including: a pressure measuring tool 110; a fastening member 120 configured to fasten the pressure measuring tool 110 in rest position onto a skin region covering an anastomotic region of a shunt blood vessel 201; and a control circuit 130 configured to receive an input signal from the pressure measuring tool 110 and to process the input signal to calculate a pressure inside the anastomotic region of the shunt blood vessel 201.

The invention describes a measuring system for the continuous non-invasive determination of blood pressure at one or more fingers. The fingers chosen for measurement and the adjacent parts of the palm rest on a supporting surface of a housing, which has the shape of a computer mouse. Inside the housing of the “CNAP Mouse”, i.e. underneath the supporting surface for the hand, the pressure generating system is located. The finger sensors are mounted on the supporting surface for the hand. The forearm and the back of the hand are left free and may be used to place intra-venous or intra-arterial access elements. Since the hand will rest on the supporting surface motion artefacts are largely avoided. Tilting or turning of the sensors is hardly possible since the fit of the sensors and thus the coupling of light and pressure are optimized.