Apparatus and method for estimating blood pressure
AssigneeSamsung Electronics Co., Ltd.
InventorDae Geun Jang
Life of this patent
Estimating the term…
Abstract
An apparatus for estimating blood pressure, includes a pulse wave sensor configured to measure a first pulse wave signal from a user, and a processor configured to differentiate or integrate the measured first pulse wave signal to obtain a reference signal, correct the measured first pulse wave signal, based on the obtained reference signal, to obtain a second pulse wave signal, and estimate the blood pressure, based on the obtained second pulse wave signal.
Claims20
An apparatus implemented in a wearable device worn by a user for continuously estimating blood pressure of the user, the apparatus comprising:
- a pulse wave sensor, including a light sensor, configured to measure a first pulse wave signal at a time of estimating the blood pressure from the user;
- a processor configured to:
- differentiate or integrate the measured first pulse wave signal to obtain a reference signal;
- correct the measured first pulse wave signal, based on the obtained reference signal, to obtain a second pulse wave signal, wherein correcting the measured first pulse wave signal adjusts for changing light intensity of an environment of the apparatus detected by the light sensor;
- and
- estimate the blood pressure of the user, based on the obtained second pulse wave signal and a third pulse wave signal measured at a calibration time when the user is in a stable state, different from the time of estimating the blood pressure to provide a continuous blood pressure condition of the user;
- and
- a display configured to display the estimated blood pressure of the user.
An apparatus implemented in a wearable device worn by a user for continuously estimating blood pressure, the apparatus comprising:
- a pulse wave sensor, including a light sensor, configured to measure a first pulse wave signal at a time of estimating the blood pressure from a user;
- a processor configured to:
- differentiate or integrate the measured first pulse wave signal to obtain a reference signal;
- correct the measured first pulse wave signal, based on the obtained reference signal, to obtain a second pulse wave signal, wherein correcting the measured first pulse wave signal adjusts for changing light intensity of an environment of the wearable device detected by the light sensor;
- obtain a feature associated with pulse pressure (PP), based on the obtained second pulse wave signal;
- and
- estimate the blood pressure of the user, based on the obtained feature associated with the PP and a reference feature associated with the PP obtained at a calibration time when the user is in a stable state, different from the time of estimating the blood pressure to provide a continuous blood pressure condition of the user;
- and
- a display configured to display the estimated blood pressure of the user.
A method of continuously estimating blood pressure via a wearable device, the method comprising:
- while the wearable device is worn by a user, measuring a first pulse wave signal, using a pulse wave sensor including a light sensor, from the user at a time of estimating the blood pressure;
- differentiating or integrating the measured first pulse wave signal to obtain a reference signal;
- correcting the measured first pulse wave signal, based on the obtained reference signal, to obtain a second pulse wave signal, wherein correcting the measured first pulse wave signal adjusts for changing light intensity of an environment of the wearable device based on measurements of the light sensor;
- estimating the blood pressure, based on the obtained second pulse wave signal and a pulse wave signal measured at a calibration time when the user is in a stable state, different from the time of estimating the blood pressure to provide a continuous blood pressure condition of the user;
- and
- displaying information of the estimated blood pressure on the wearable device.
Dependencies are inferred from the claim text.