Disclosed herein is a base device with a pump device for applying pressure to a working fluid and a body contact device that can be detachably coupled to one another. A housing of the base device has a contact surface for the body contact device where the contact surface has a passage which can be closed by means of a closing member of a valve device. A spring is provided for applying spring force to move the closing member into a position that closes the passage. The body contact device has a pressure applicator, which can be acted upon by the working fluid, to apply pressure to the finger and a sealing element for creating a fluid connection with the base device. The body contact device has a deflecting means for deflecting the closing member against the spring force in the operating configuration.

The present disclosure provides for specific shapes and combinations of the compression members amenable to the safest, yet most effective compression of the carotid and vertebral arteries aimed at prevention of embolic stroke. An associated method of achieving an optimal compression of said arteries for the purpose of stroke prevention is provided.

A physiological sensor apparatus offers auto-adjustment of a physiological sensing surface relative to a human tissue receiving surface. The apparatus includes an electroactive polymer (EAP) structure, operable to perform actuation and pressure sensing simultaneously, via application of superposed actuation and AC sensing signals. Actuation enables controlled adjustment of the positioning of a sensing surface against the tissue receiving surface. Sensing provides a simultaneous real-time measure or indication of the magnitude of a returning force applied to the sensing surface by the receiving surface. This returning force provides feedback on the state of positioning of the sensing surface. A controller is adapted to adjust the actuation signal in dependence upon the sensing data, to thereby adjust the positioning of the sensing surface in real-time.

The purpose of the present invention is to reduce the influence of pump ripple and to achieve fast control of cuff pressure with a general purpose magnetic valve when continuously measuring blood pressure. A blood pressure meter 1 includes a pump 11, a cuff 12 to be mounted on the site of blood pressure measurement of a subject, a first valve 13, a first pressure sensor 14, a detection sensor 18, a second valve 23, and a second pressure sensor 24. The blood pressure meter 1 also includes a valve opening adjustment unit 42 and a blood pressure measurement unit 43. The first valve 13 adjusts discharge volume of the pump 11 and the second valve 23 adjusts cuff pressure inside the cuff 12. The first pressure sensor 14 detects the discharge pressure of the pump 11, the second pressure sensor 24 detects the cuff pressure, and the detection sensor 18 detects the amount of light associated with the volume of the artery at the site of blood pressure measurement of the subject. The valve opening adjustment unit 42 acquires the discharge pressure, the cuff pressure, and the amount of light, and adjusts the openings of the first valve 13 and the second valve 23. The blood pressure measurement unit 43 measures the blood pressure of the subject on the basis of the cuff pressure.

The present disclosure provides for specific shapes and combinations of the compression members amenable to the safest, yet most effective compression of the carotid and vertebral arteries aimed at prevention of embolic stroke. An associated method of achieving an optimal compression of said arteries for the purpose of stroke prevention is provided.

Disclosed embodiments relate to apparatuses and methods for a skin perfusion pressure determination device. In some embodiments, a skin perfusion pressure determination device can include a sensor module having a first sensor for sensing a first parameter associated with a pressure exerted on a target area by the sensor module and a second sensor for sensing a second parameter associated with an amount of blood perfusion at the target area. In some embodiments, the first sensor and the second sensor can be arranged such that, when the sensor module is pressed against the target area the first sensor produces an output corresponding to the sensed first parameter and the second sensor produces an output corresponding to the sensed second parameter.

Provided is a method of determining a hemostatic pressure in a tourniquet includes: driving a limb occlusion pressure (LOP) sensor, which measures a pulse signal of a subject, at a first brightness (S1); checking whether the LOP sensor and a main body are connected to each other (S2); providing a first hemostatic pressure from the main body to the tourniquet (S3); checking, on the basis of a result value of the LOP sensor, whether a pulse of the subject is detected (S4); and, when, on the basis of the result value of the LOP sensor, the pulse of the subject is determined as “not detected,” providing a hemostatic pressure, which is obtained by increasing the current hemostatic pressure by a safe hemostatic pressure, from the main body to the tourniquet (S7).

An electronic device and method are disclosed herein. The electronic device includes a display, a printed circuit board (PCB) disposed below the display and having a first surface facing the display, a biometric sensor disposed on the first surface of the PCB and configured to measure a biometric signal related to a heartbeat, a pressure sensor disposed below the display and configured to generate a pressure signal based on measuring a pressure applied to the display, a processor. The processor implements the method, including measuring, by the biometric sensor, the biometric signal, measuring, by the pressure sensor, the pressure applied to the display, calculating biometric information related to a heartbeat by interlinking the biometric signal and the pressure signal, and outputting the calculated biometric information to the display.

A compression garment may be used for measuring fluid buildup in a subcutaneous tissue space. The compression garment may include a processor, an emitter, and a detector. The emitter and the detector are coupled to the processor. The emitter may be configured to emit a signal into a subcutaneous tissue space of a subject. The signal may be reflected by the subcutaneous tissue space. The detector may be configured to receive the reflected signal. The processor may be configured to determine a fluid status in the subcutaneous tissue space. The fluid buildup in the subcutaneous tissue space may be based on an energy level of the reflected signal.

Methods, devices, and systems for determining an estimated pulse wave velocity of an artery of a subject. Embodiment methods may include applying a series of counter pressures, measuring a first parameter related to pulse wave velocity, estimating a second parameter in a model, and determining the estimated pulse wave velocity. The counter pressures may be applied at a set location on the subject over the artery with a pressure device. Each of the counter pressures may be different from one another, applied at the set location, and between zero and a diastolic pressure of the subject. The first parameter may be measured when each of the series of counter pressures is applied. The model may establish a relationship of the first parameter measured to each of the series of counter pressures. The estimated pulse wave velocity may be determined based on the second parameter estimated in the model.