A low-profile blood pressure measurement system and methods of use are disclosed. The system includes an expandable member or structure that has a multi-compartment structure and/or is mounted on a rigid surface or structure. The system is incorporated into a portable multi-function device, or is configured to communicate with a portable multi-function device.

An apparatus for estimating bio-information according to an embodiment includes: a sensor that measures a pulse wave signal from an object and contact pressure of the object; and a processor that obtains an oscillometric envelope based on an amplitude of the pulse wave signal and the contact pressure, and estimates bio-information based on a center of mass of a phase of contact pressure of the obtained oscillometric envelope.

A charging station for providing power to a physiological monitoring device can include a charging bay and a tray. The charging bay can include a charging port configured to receive power from a power source. The tray can be positioned within and movably mounted relative to the charging bay. The tray can be further configured to secure the physiological monitoring device and move between a first position and a second position. In the first position, the tray can be spaced away from the charging port, and, in the second position, the tray can be positioned proximate the charging port, thereby allowing the physiological monitoring device to electrically connect to the charging port.

A smart watch comprises a watch head and a watch strap. The watch head comprises: a first electrode for contacting skin of a watch-wearing wrist; a second electrode for contacting skin of a non-watch-wearing wrist, wherein both the first electrode and the second electrode are electrically connected with a main control unit of the smart watch, so that the main control unit calculates an electrocardiogram according to bioelectric signals detected by the first electrode and the second electrode; and an air bag for contacting the skin of the watch-wearing wrist, wherein the air bag is respectively connected with an air pump and a pressure sensor, and the pressure sensor is connected with the main control unit, so that the main control unit calculates blood pressure according to a detection signal of the pressure sensor.

An apparatus for estimating bio-information, may include: a sensor part having a photoplethysmography (PPG) sensor configured to measure a PPG signal from an object of a user, and a force sensor configured to measure a contact force between the object and the PPG sensor; an output interface, which before the PPG signal is measured, is configured to output first guide information indicating a predetermined number of times the user is required to touch the sensor part, and second guide information indicating a number of times that the sensor part has been touched since the first guide information is output; and a processor configured to estimate bio-information of the user by using the PPG signal based on the number of times that the sensor has been touched since the first guide information is output, corresponding to the predetermined number of times the user is required to touch.

A blood pressure measuring apparatus for measuring blood pressure of a subject using a cuff attached to the subject includes a processor and a memory to store instructions that are readable by the processor. As the instructions are executed by the processor, the apparatus generates a pulsation signal of the subject while increasing an inner pressure of the cuff; generates a first-order differential signal by differentiating the pulsation signal. The apparatus then detects an inappropriate attachment state of the cuff based on at least one of: a bottom value of the first-order differential signal; a relationship between a peak value and the bottom value of the first-order differential signal; an amplitude amount of the first-order differential signal including the bottom value in a unit time; and a relationship between the amplitude amount and an amplitude amount of the first-order differential signal including the peak value in a unit time.

A sphygmomanometer includes a frame that spatially demarcates a region in which a display screen is displayed. On the display screen, a scale indication for making a value of pressure readable is displayed along one direction. On the display screen, a mark that represents a pressure of a cuff by a position of the mark with respect to the scale indication is displayed. When the pressure changes, a display control unit performs control to slide the scale indication with respect to the frame along the one direction at a slide speed corresponding to a predetermined pressure change rate or a pressure change rate obtained by actual measurement in a pressurizing process or a depressurizing process of the cuff so that the mark falls within the frame.

A pulse wave measurement device including: a belt to be worn around a measurement target site; first and second pulse wave sensors that are mounted on the belt spaced from each other with respect to a width direction of the belt, and that detect pulse waves of opposing portions of an artery passing through the measurement target site; a pressing unit that is mounted on the belt is capable of changing pressing forces of the pulse wave sensors against the measurement target site; a waveform comparing unit that acquires pulse wave signals which are time-sequentially output by the pulse wave sensors respectively, and compares waveforms of the pulse wave signals; and a pulse wave sensor pressing force setting unit that variably sets the pressing forces by the pressing unit such that the waveforms of the pulse wave signals compared by the waveform comparing unit become identical to each other.

A signal processing apparatus includes a memory configured to store instructions; and a processor configured to execute the instructions to obtain a signal; obtain a frequency band spectrum by applying a Fast Fourier Transform (FFT) to the obtained signal; and remove noise from the obtained spectrum by applying a first filter and a second filter, which are different from each other, to the obtained frequency band spectrum.

There is disclosed a vital sign measuring device (VSMD) for obtaining an indication of a person’s blood pressure via the person’s finger by means of a finger cuff having an inflatable bladder. Blood pressure may be determined without the use of any electromagnetic radiation, such as miniature dynamic light sensing (mDLS). Apparatuses and methods for obtaining an indication of other vital signs, including hematocrit and total protein, are also disclosed.