The invention relates to a device for analyzing a substance, comprising: —a measurement body (1, 1a), which has a measurement surface (2) and is to be brought at least in part into contact with the substance (3) in the region of the measurement surface for the purpose of measuring; a laser device (4), particularly having a quantum cascade laser (QCL), a tunable QCL and/or a laser array, preferably an array of QCLs, in order to generate one or more excitation beams (10) at different wavelengths, preferably in the infrared or medium infrared spectral range, which is directed to the substance (3); and a detection apparatus (5, 6, 7) which is integrated at least in part in the measurement body (1, 1a) or connected thereto and comprises the following: •a source (5) for coherent detection light (11) and •a first optical waveguide structure (6) which can be or is connected to the source for the detection light, which guides the detection light, and has a refractive index which is dependent at least in portions on the temperature and/or pressure, wherein the first optical waveguide structure has at least one portion (9) in which the light intensity depends on a phase shift of detection light in at least one part of the first optical waveguide structure (6) due to a change in temperature or pressure.

There is provided a device and a method of operating the device for determining whether the device is immersed in a fluid. An acceleration signal for the device is acquired (302) and a pressure within the device is detected (304). It is determined whether the device is immersed in a fluid based on a comparison of the acquired acceleration signal with the detected pressure (306).

The disclosed subject matter includes a wearable device for blood pressure monitoring. The embodiments employ a set of sensors to calculate a relative external pressure. A transmural pressure error can be calculated based on the relative external pressure. A measured transmural pressure can be corrected based on the transmural pressure error. Some embodiments track altitude to calculate relative external pressure error. Some embodiments track arm orientation to calculate relative external pressure error.

There is provided a device comprising a blood pressure sensor for sensing blood pressure and a method for controlling the device. An angle of the device with respect to the direction of gravity is determined (202) and a location of one or more features of the user holding the device is identified (204). A height of the blood pressure sensor relative to a heart level of the user is determined based on the determined angle of the device with respect to the direction of gravity and the identified location of the one or more features of the user (206). The device is controlled based on the determined height of the blood pressure sensor relative to the heart level of the user (208).

Described herein are assistant robots that observe signs of core health, health dangers, and/or signs of medical distress in a home or at work. As such, the assistant robots can take actions to prevent dangerous situations, diagnose health problems, respond to requests for help, and provide regular treatments or analysis of a person's medical state. The assistant robots can learn users' habits or be provided with knowledge regarding humans in its environment. The assistant robots develop a schedule and contextual understanding of the persons' behavior and needs. The assistant robots may interact, understand, and communicate with people before, during, or after providing assistance. The robot can combine gesture, clothing, emotional aspect, time, pose recognition, action recognition, and other observational data to understand people's medical condition, current activity, and future intended activities and intents.

Disclosed are devices and methods for estimating blood pressure, which implement a pulse-transit-time-based blood pressure model that can be calibrated. Some implementations provide reliable and user friendly means for calibrating the blood pressure model using blood pressure perturbation methods and multiple sensors.

A method of estimating a body temperature of an individual based on physiological data including a heart rate received from at least one sensor 510 and received environmental data. The physiological data and the environmental data are inputted into a model present on a processor 520. The model generates an estimated body temperature and an estimated physiological condition based on the inputs. The processor 520 compares the estimated physiological condition to a measured physiological condition in the physiological data. A controller 530 modifies at least one parameter in the model when the difference between the estimated physiological condition and the measured physiological condition is above a threshold.

According to a first aspect of the invention, an information processing apparatus includes an information acquisition unit configured to acquire first blood pressure information and second blood pressure information that is information earlier than the first blood pressure information, a blood pressure fluctuation detector configured to detect a blood pressure fluctuation exceeding a first reference value from the first and second blood pressure information, and a fluctuation information output unit configured to output blood pressure fluctuation information that reports the blood pressure fluctuation.

One embodiment provides an offset calibration circuitry configured to compensate an offset voltage of a resistive bridge sensor. The offset calibration circuitry includes a first current digital to analog converter (IDAC) coupled to a first successive approximation register (SAR), a second IDAC coupled to a second SAR and an SAR controller circuitry. The first IDAC is configured to couple to a negative voltage port of a resistive bridge sensor. The first SAR is configured to store a circuitry first digital value. The second IDAC is configured to couple to a positive voltage port of the resistive bridge sensor. The second SAR is configured to store a second digital value. The SAR controller circuitry is configured to adjust each bit of the first SAR and each bit of the second SAR based, at least in part, on an output of a comparator. The comparator is configured to compare a voltage on the negative voltage port or a voltage on the positive voltage port to a common mode voltage.

The disclosed subject matter includes a wearable device for cuffless blood pressure monitoring that does not require external per-person calibration, such as with a cuff-based measurement device. The embodiment employs photoplethysmography sensors to obtain pulse wave velocity and develops compensation for external pressure influences.