A glucose measuring system includes a glucose meter that incorporates wireless communication capabilities. The meter can advantageously be a low cost meter by eliminating expensive components, such as the display. The user nevertheless is able to retrieve and view his or her glucose values by referring to displays within the glucose measuring local area network. Feedback via these displays can advantageously be used by the diabetic to create a higher level of confidence and safety.

Methods and devices to monitor an analyte in body fluid are provided. Embodiments include continuous or discrete acquisition of analyte related data from a transcutaneously positioned in vivo analyte sensor automatically or upon request from a user. The in vivo analyte sensor is coupled to an electronics unit holding a memory with instruction to cause processing circuitry to initiate a predetermined time period that is longer than a predetermined life of the sensor, during the predetermined time period, convert signals from the sensor related to glucose to respective corresponding glucose levels, without relying on any post-manufacture independent analyte measurements from a reference device, and at the expiration of the predetermined time period, disable, deactivate, or cease use of one or more feature.

In an example embodiment, an optical communication system includes an implantable optical transmitter and an external optical receiver. The transmitter includes a housing having one or more drivers, plural light emitting sources, and an optical element arranged therein. Each driver converts a digital data signal into modulation signals to drive the sources. Each source generates a light beam in response to a corresponding modulation signal, each light beam contributing to form a single optical signal. The optical element directs the light beams to exit the housing such that a peak position of light intensity of each light beam is separated from a corresponding peak position of light intensity of an adjacent light beam by at least a first distance and less than a second distance. The optical receiver includes at least one photodiode that detects light generated by the sources and generates a reconstructed data signal.

Radio frequency motion sensors may be configured for operation in a common vicinity so as to reduce interference. In some versions, interference may be reduced by timing and/or frequency synchronization. In some versions, a master radio frequency motion sensor may transmit a first radio frequency (RF) signal. A slave radio frequency motion sensor may determine a second radio frequency signal which minimizes interference with the first RF frequency. In some versions, interference may be reduced with additional transmission adjustments such as pulse width reduction or frequency and/or timing dithering differences. In some versions, apparatus may be configured with multiple sensors in a configuration to emit the radio frequency signals in different directions to mitigate interference between emitted pulses from the radio frequency motion sensors.

The embodiments include an apparatus used in combination with a computer for sensing biopotentials. The apparatus includes a catheter in which there is a plurality of sensing electrodes, a corresponding plurality of local amplifiers, each coupled to one of the plurality of sensing electrodes, a data, control and power circuit coupled to the plurality of local amplifiers, and a photonic device bidirectionally communicating an electrical signal with the data, control and power circuit. An optical fiber optically communicated with the photonic device. The photonic device bidirectionally communicates an optical signal with the optical fiber. An optical interface device provides optical power to the optical fiber and thence to the photonic device and receives optical signals through the optical fiber from the photonic device. The optical interface device bidirectionally communicates an electrical data, control and power signal to the computer.

A method of controlling an analysis of electromagnetic (EM) signal of a human subject. The method comprises positioning an EM transducer unit in front of a skin area above a target intrabody volume of a human subject, the EM transducer unit having at least one EM transducer, a pressure applying unit that applies a variable pressure on the skin area, and a pressure sensor, measuring at least one pressure parameter indicative of the variable pressure using the pressure sensor, capturing EM signal using the at least one EM transducer, and performing an analysis of the EM signal to infer at least one intrabody parameter of the target intrabody volume. The analysis is controlled according to the at least one pressure parameter.

A tracer detection device includes an enclosed body, and a plurality of tracer sensors, a battery, a memory, and a transmitter, each disposed within the enclosed body. The plurality of tracer sensors is configured to detect measurement values at a surface and underneath the surface of a gastrointestinal tract. The battery is configured to power the plurality of tracer sensors. The memory is configured to receive measurement values detected by the plurality of tracer sensors. The transmitter is configured to transmit measurement values detected by the plurality of tracer sensors to an external device after the enclosed body has passed through the gastrointestinal tract. The enclosed body includes a steering feature that ensures the enclosed body is oriented in an intended direction. The plurality of tracer sensors triggers release of a drug. The plurality of tracer sensors estimate distances to gastrointestinal walls for normalizing signals.

Some embodiments described herein relate to an apparatus including a light source configured to transmit an excitation optical signal to an implanted sensor and a detector configured to detect an analyte-dependent optical signal emitted from an implanted sensor. The apparatus can include a lens configured to focus at least a portion of the analyte-dependent optical signal onto the detector.

In an example embodiment, an optical communication system includes an implantable optical transmitter and an external optical receiver. The transmitter includes a housing having one or more drivers, plural light emitting sources, and an optical element arranged therein. Each driver converts a digital data signal into modulation signals to drive the sources. Each source generates a light beam in response to a corresponding modulation signal, each light beam contributing to form a single optical signal. The optical element directs the light beams to exit the housing such that a peak position of light intensity of each light beam is separated from a corresponding peak position of light intensity of an adjacent light beam by at least a first distance and less than a second distance. The optical receiver includes at least one photodiode that detects light generated by the sources and generates a reconstructed data signal.

A transparent device with bio-signal acquisition and feedback capabilities is provided, and includes a base that includes at least one actuator, a transparent container connected to the base, first and second electrodes disposed on the base, a body temperature sensor, a photoplethysmography (PPG) sensor module, and a bio-signal acquisition module that has an electrocardiographic (ECG or EKG) sensor function and acquires an ECG signal, a PPG signal, and a body temperature signal of the user. The bio-signal acquisition module determines physiological indices by using a preset algorithm and controls the at least one actuator to provide corresponding visual or auditory feedbacks in real time according to the physiological indices and an extended cardiac index of the user.