An implantable device for controlling electrical conditions of body tissue. A feedback sense electrode and a compensation electrode are positioned proximal to the tissue to make electrical contact with the tissue. A feedback amplifier is referenced to ground, and takes as an input a feedback signal from the feedback sense electrode. The output of the feedback amplifier is connected to the compensation electrode. The feedback amplifier thus drives the neural tissue via the compensation electrode in a feedback arrangement which seeks to drive the feedback signal to ground, or other desired electrical value.

A system and method for monitoring biometric data of a diver and signaling those data from a first communication device to other communication devices, e.g., those of other divers, on a ship or buoy. A signal generated from a device of the diver can generate a diver identifier, an indication of a stress state of the diver and the diver's location.

The present invention relates to assessing a psychophysiological responsiveness or non-responsiveness of a subject. A device (10) for assessing a psychophysiological responsiveness of a subject is presented, the device comprising a stimulus unit (11) for providing an electrical stimulus via a first and a second electrode (21, 22) to a skin (100) of the subject; a sensing unit (12) for acquiring an impedance signal (15) indicative of an impedance between the first and the second electrode in response to said electrical stimulus; and an analysis unit (13) adapted to identify an electrical double-layer based on the impedance signal acquired in response to the electrical stimulus and to determine a psychophysiological responsiveness of the subject based on the identified electrical double-layer. It has been found that identifying the presence or absence of an electrical double-layer based on the impedance signal acquired in response to the electrical stimulus can serve as a reliable indicator whether the subject is in a responsive or nonresponsive psychophysiological state. Further, a corresponding method, computer program and system (1) are presented.

A medical device (10) includes a medical component (12); at least one environmental sensor (14, 14.sub.E); an electronic processor (20); and a non-transitory computer readable medium (26). The non-transitory computer readable medium (26) stores: device operational instructions executable by the electronic processor (20) to control the medical component to perform a medical function respective to a medical subject; an operating specification (30) for the medical device; and device monitoring instructions executable by the electronic processor (20) to: receive a measurement of at least one environmental parameter from the at least one environmental sensor; and output an alert (32) about the performance of the medical function respective to the medical subject if the measurement of the at least one environmental parameter is outside of the operating specification for the medical device.

An information processing apparatus includes an acquisition unit, an association unit, and a guide unit. The acquisition unit acquires biological information of a user. The association unit associates the acquired biological information with a specific state of the user. The guide unit guides the user to the specific state. A reference to be used for association with the specific state by the association unit is calibrated by using the biological information, the biological information being acquired from the user who is guided to the specific state by the guide unit.

An information processing apparatus includes a selection unit. The selection unit selects whether to calibrate biological information of a user in accordance with designation by the user. When the selection unit selects no calibration in accordance with designation by the user, the biological information is associated with a specific state of the user under a predetermined condition.

An implantable device for controlling electrical conditions of body tissue. A feedback sense electrode and a compensation electrode are positioned proximal to the tissue to make electrical contact with the tissue. A feedback amplifier is referenced to ground, and takes as an input a feedback signal from the feedback sense electrode. The output of the feedback amplifier is connected to the compensation electrode. The feedback amplifier thus drives the neural tissue via the compensation electrode in a feedback arrangement which seeks to drive the feedback signal to ground, or other desired electrical value.

A technology for a wearable medical device for monitoring medical parameters. Medical measurement data can be received at the wearable medical device from a medical measurement sensor attached to the wearable medical device or a medical measurement sensor in communication with the wearable medical device. A calibration coefficient can be determined for calibrating the wearable medical device based on the medical measurement data. The wearable medical device can be calibrated based on the calibration coefficient.

An implantable device for controlling electrical conditions of body tissue. A feedback sense electrode and a compensation electrode are positioned proximal to the tissue to make electrical contact with the tissue. A feedback amplifier is referenced to ground, and takes as an input a feedback signal from the feedback sense electrode. The output of the feedback amplifier is connected to the compensation electrode. The feedback amplifier thus drives the neural tissue via the compensation electrode in a feedback arrangement which seeks to drive the feedback signal to ground, or other desired electrical value.

A system of estimating acclimatization to environmental conditions, and providing a corrected fitness level estimates based on said acclimatization level. The environmental conditions are particularly related to heat and altitude. At first previous training history is provided including a plurality of day records, where each day record includes a date stamp and information regarding altitude and optionally temperature and humidity and training history including timestamp and training load data from executed exercises in stored records.