The invention relates to a method for operating a blood pressure measuring device, comprising the method steps: performing a blood pressure measurement using the blood pressure measuring device, consisting of a cuff for placing around an extremity, a pump for inflating the sleeve and a pressure sensor for registering the cuff pressure, inflation of the cuff taking place in an inflation phase and release of the pressure in the sleeve taking place in a release phase, registering and storing the pressure profile in the cuff over time during the inflation phase and/or during the release phase in a control and storage unit, extracting a pulse-like signal component from the pressure profile over time of the measured cuff pressure during the inflation phase and/or the release phase by a signal analysis inside the control and storage unit, signal analysis of the extracted in pulse-like signal component.

The invention relates to a method for operating a blood pressure measuring device, comprising the method steps: performing a blood pressure measurement using the blood pressure measuring device, consisting of a cuff for placing around an extremity, a pump for inflating the sleeve and a pressure sensor for registering the cuff pressure, inflation of the cuff taking place in an inflation phase and release of the pressure in the sleeve taking place in a release phase, registering and storing the pressure profile in the cuff over time during the inflation phase and/or during the release phase in a control and storage unit, extracting a pulse-like signal component from the pressure profile over time of the measured cuff pressure during the inflation phase and/or the release phase by a signal analysis inside the control and storage unit, signal analysis of the extracted in pulse-like signal component.

A blood pressure cuff may comprise an alignment component, a sleeve, and a tapered inflatable bladder disposed within the sleeve. The tapered inflatable bladder may have a width that increases as the distance from the alignment component increases, and the tapered inflatable bladder and the alignment component may be configured to position the blood pressure cuff around a limb having a blood vessel and a circumference, such that at a position coincident with the blood vessel, the width of the tapered inflatable bladder is about 40% of the circumference of the limb. A method of using such a blood pressure cuff may comprise placing the alignment component at the position coincident with the blood vessel of the limb, wrapping the cuff around the limb such that the width of the tapered inflatable bladder overlaying the blood vessel is about 40% of the circumference of the limb, and inflating the bladder.

A blood pressure cuff may comprise an alignment component, a sleeve, and a tapered inflatable bladder disposed within the sleeve. The tapered inflatable bladder may have a width that increases as the distance from the alignment component increases, and the tapered inflatable bladder and the alignment component may be configured to position the blood pressure cuff around a limb having a blood vessel and a circumference, such that at a position coincident with the blood vessel, the width of the tapered inflatable bladder is about 40% of the circumference of the limb. A method of using such a blood pressure cuff may comprise placing the alignment component at the position coincident with the blood vessel of the limb, wrapping the cuff around the limb such that the width of the tapered inflatable bladder overlaying the blood vessel is about 40% of the circumference of the limb, and inflating the bladder.

The virtual stethoscope and otoscope includes a head having a hollow internal volume with a diaphragm on one side and an otoscope cone on the opposite side. The head is coupled to one end of the tube and a microphone is coupled to an opposite side of the tube. The microphone is coupled to a cable and connector which is attached to a patient computing device. The diaphragm is placed on the patient and the body vibrations produce sound waves which are detected by the microphone. The microphone converts the sound waves into electrical signals which are amplified by the patient computing device and transmitted to a medical professional computing device. Alternatively, the otoscope can be positioned to view a portion of the patient. A camera converts the photo data into electrical signals which are transmitted from the patient computing device to the medical professional computing device.

A method of detecting atrial fibrillation includes detecting a pulse signal to obtain a time pulse waveform and converting it to an energy spectrum waveform via Fast Fourier Transform. The energy spectrum waveform includes a first frequency region, a second frequency region, and a third frequency region. The number of spikes in each frequency region was calculated and the heart indexes of the first, second, and third frequency regions were obtained, which were the first heart index, the second heart index, and the third heart index. And by the sum of the three heart index values and the first heart index to determine the possibility of atrial fibrillation. An apparatus for detecting atrial fibrillation is also provided, whereby the user can determine the possibility and predicting atrial fibrillation by simple measurement of blood pressure at home.

A method of detecting atrial fibrillation includes detecting a pulse signal to obtain a time pulse waveform and converting it to an energy spectrum waveform via Fast Fourier Transform. The energy spectrum waveform includes a first frequency region, a second frequency region, and a third frequency region. The number of spikes in each frequency region was calculated and the heart indexes of the first, second, and third frequency regions were obtained, which were the first heart index, the second heart index, and the third heart index. And by the sum of the three heart index values and the first heart index to determine the possibility of atrial fibrillation. An apparatus for detecting atrial fibrillation is also provided, whereby the user can determine the possibility and predicting atrial fibrillation by simple measurement of blood pressure at home.

The technology relates to a remote ischemic preconditioning system having a cuff configured to contract about a limb of a subject; an actuator connected to the cuff that, when actuated, causes the cuff to contract about the limb of the subject; a controller that controls the actuator to operate according to a treatment protocol that includes a plurality of treatment cycles of contracting and releasing the cuff about the limb of a subject; a first sensor for measuring oxygen saturation level in the blood of the limb; a second sensor for measuring a pulse property in the limb; and a feedback control unit in communication with the controller and configured to receive the oxygen saturation measurement from the first sensor and the pulse property from the second sensor; wherein the feedback control unit is further configured to: compare the oxygen saturation level to a first predetermined value and signal the controller to operate the actuator to further inflate the cuff if the oxygen saturation level is above the predetermined value; and compare the pulse property to a second predetermined value and signal the controller to operate the actuator to further inflate the cuff if the pulse rate or pulse strength is above the predetermined value.

The disclosure relates to systems and methods for noninvasively performing cardiac auscultation. In some implementations, a method includes: performing, using a BP cuff of a BP cuff system, a blood pressure measurement of a subject to obtain one or more blood pressure values corresponding to the subject; inflating, based on the one or more blood pressure values corresponding to the subject, the BP cuff to a subject specific pressure value; capturing, using the BP cuff system, while the BP cuff is inflated to the subject specific pressure value, a pulse pressure waveform signal associated with an artery of the subject; obtaining a sound waveform signal associated with a heart valve of the subject by filtering the pulse pressure waveform signal to extract sound components associated with the opening or closing of the heart valve; and analyzing the sound waveform signal to identify characteristics of the heart of the subject.

The present invention provides a solution for focusing on each imaging target of a subject eye in a robust and highly accurate way. An information processing apparatus includes, a confocal data acquisition unit configured to acquire a confocal signal based on return light from the subject eye, a nonconfocal data acquisition unit configured to acquire a nonconfocal signal based on the return light from the subject eye, and an identification unit configured to identify an in-focus position of measurement light based at least on the nonconfocal signal out of the confocal and the nonconfocal signals.