The present invention relates generally to systems and methods for measuring an analyte in a host. More particularly, the present invention relates to systems and methods for transcutaneous measurement of glucose in a host.

A method, apparatus, computer program, system and device for measuring oscillatory motion comprising: receiving a plurality of signals related to a plurality of measurements of a direction of a vector parameter (a.sub.t-1, a.sub.t); determining a predominant measured direction of the vector parameter (ā.sub.t) based on the plurality of measurements of the direction of the vector parameter; determining an angle of rotation (φ.sub.t) between: a measured direction of the vector parameter (a.sub.t) of one of the plurality of measurements of the direction of the vector parameter, and the predominant measured direction of the vector parameter (ā.sub.t).

Generally, embodiments of the invention relate to analyte determining devices (e.g., electrochemical analyte monitoring systems) that include an indicator element that provides information relating to service history of the analyte determining devices, including, for example, previous use of the analyte determining devices. Also provided are systems and methods of using the, for example electrochemical, analyte determining devices in analyte monitoring.

An optoacoustic imaging system includes an ultrasound transducer array, first and second light sources and a switching power supply that generates power for the light sources. The switching power supply includes an input for impeding its switching operation. A data acquisition unit samples the ultrasound transducer array for a first predetermined period of time after a pulse of light from the first light source and for a second predetermined period of time after a pulse of light from the second light source and stores the sampled data. A master processor utilizes the input to impede operation of the switching operation of the switching power supply during the first predetermined period of time after a pulse of light from the first light source, and during the second predetermined period of time after a pulse of light from the second light source.

A test of visual function and/or functional vision may be performed at varying luminance levels. A first course may be selected for a subject. A given course may comprise a layout having a beginning point, at least one turn, at least one obstacle, and an ending point. The first course may be illuminated with a first luminance level based on an estimated lower light sensitivity cutoff. The subject may be prompted to perform a first run of the test. The test may comprise, from the beginning point to the ending point, navigating the layout of the first course by walking around the at least one turn and avoiding the at least one obstacle. A determination may be made as to whether the subject successfully completed the first course based on one or both of speed or accuracy.

A semi-rigid foot orthotic can have 3-axis accelerometers, gyroscopes, magnetometers, and strain gauges embedded in one or more flexible regions along with a microprocessor and wireless transmitter. Data from the sensors can be used to track the gait cycle. Data on the flexing, bending, or rotating of portions of the orthotic are processed and compared to ideal or data from other runs to rate the effectiveness of the orthotic. The orthotic and the sole of the shoe have relative freedom of motion between them. By doing a 3D comparing of the location, motion and orientation of the shoe from the same information for at least one orthotic region; determining shoe-to-orthotic relative motion. Modifications or adjustments can be made to improve the user-experience. The computation can involve either or both of a cloud based server and an external hand-held device in wireless communication with the orthotic.

A medical device is used to image a body cavity using a plurality of axially and angularly spaced imaging sensors. Each imaging sensor generates an image that is distinct from one another due to distinct fields of vision. Each image includes an overlapping zone with commonalties that are used to extrapolate a greater calibrated image.

A concentration measurement apparatus measures a temporal relative change amount (ΔcHb, ΔO.sub.2Hb) of either or both of total hemoglobin concentration and oxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, and includes a light incidence section making measurement light incident on the head, a light detection section detecting the measurement light propagated through the interior of the head and generating a detection signal in accordance with the intensity of the measurement light, and a CPU determining, based on the detection signal, the relative change amount (ΔcHb, ΔO.sub.2Hb) and performing a filtering process of removing frequency components less than a predetermined frequency from frequency components contained in the relative change amount (ΔcHb, ΔO.sub.2Hb).

A method of screening for contamination during food production is disclosed. The method includes applying an exogenous, bacteria-specific contrast agent to a surface to be screened, wherein the surface to be screened is one or more of a food product, a food-preparation surface, a food-handling surface, and a food-equipment surface. The surface is illuminated with excitation light emitted by at least one light excitation light source of a handheld device and optical signals responsive to illumination of the surface are filtered with at least one optical filter of the handheld device. Bacterial fluorescence data regarding the illuminated surface is collected with an image sensor of the handheld device and, in real-time, based on the collected bacterial fluorescence data, the presence and/or location of bacteria on the illuminated surface is determined

Methods and systems for producing an electrophysiological map of a heart of a patient are disclosed. An example method may include determining a target location and an orientation of a catheter tip, confirming that the tip is located at the target location, measuring the heart parameter value at each of the target locations, and superimposing a plurality of representations of the heart parameter value. Confirmation that the tip of the catheter is located at a target location can be accomplished by comparing the current location of the tip with the target location, a corresponding heart parameter value being measured at each of the target locations by a heart parameter sensor, and the representations of the heart parameter value being superimposed on an image of the heart at the target location to produce the electrophysiological map.