Abstract: A computer-implemented method is presented for quantifying hydration in a subject. The method includes: receiving a heart rate signal indicative of heart rate of the subject; extracting features from the heart rate signal, where one or more of the extracted features include a frequency domain representation of the heart rate signal; constructing a feature vector from the extracted features; and quantifying hydration status of the subject as a percent of body weight of the subject by classifying the feature vector using machine learning, where percentages of body weight are expressed in increments on the order of one percent or less.

Abstract: An assistive device for subcutaneous injections or implants. The assistive device is placed under a blood pressure cuff that displaces the skin and subcutaneous tissues of a patient at an insertion site in order to allow guided insertion of a needle or implant applicator into a subcutaneous fat layer. The skin and subcutaneous tissue is displaced or drawn, via pressure applied by the blood pressure cuff, through an injection window of a device body into a hollow cavity of the device body. A guide channel leads from a front side of the device body into the hollow cavity, and an applicator of an adapter is inserted through the guide channel into the subcutaneous fat layer.

Abstract: An assistive device for subcutaneous injections or implants. The assistive device is placed under a blood pressure cuff that displaces the skin and subcutaneous tissues of a patient at an insertion site in order to allow guided insertion of a needle or implant applicator into a subcutaneous fat layer. The skin and subcutaneous tissue is displaced or drawn, via pressure applied by the blood pressure cuff, through an injection window of a device body into a hollow cavity of the device body. A guide channel leads from a front side of the device body into the hollow cavity, and an applicator of an adapter is inserted through the guide channel into the subcutaneous fat layer.

Abstract: A sleep apnea treatment device that includes a first chamber, a second chamber, and an energy storage component. The first chamber receives a patient's exhaled breath, which causes the second chamber to be expanded with fresh air that is drawn in during expansion of the second chamber. Energy from the patient's exhaled breath is stored in the energy storage component and then used to expel the air in the second chamber under positive pressure into the patient's airway. The first chamber can expand during the patient's exhaled breath which causes a plate or other movable member to simultaneously expand the second chamber to thereby draw in the fresh air that is subsequently expelled to the patient using the energy in the energy storage component.

Abstract: Among other things, a vestibular prosthesis includes a wearable motion sensing system, the motion sensing system generating a motion signal indicative of a motion thereof, wherein the motion includes rotation about two distinct axes; a signal processor in communication with the motion sensing system, the signal processor being configured to generate an estimate of a tilt of the motion sensing system; and an actuator responsive to the estimate of the tilt made by the signal processor.