Solianis Holding Ag

Biovotion Ag

Etienne Hirt

Andreas Caduff

Thomas W Schrepfer

Gianluca Stalder

Pascal Truffer

Stephan Buschor

Heinz Süsstrunk

A device for measuring the glucose level in living tissue has electrodes () for being brought into contact with the specimen and a voltage-controlled oscillator () as a signal source for generating an AC voltage in a given frequency range. The AC voltage is applied to the electrodes (). A voltage over the electrodes is fed to a processing circuitry (), which converts it to the glucose level using calibration data. The voltage-controlled oscillator () has a symmetric design with adjustable gain for generating signals in a large frequency range with low distortions at a low supply voltage. The processing circuit comprises a simple rectifier network with software-based correction. The electrodes () are of asymmetric design and optimized for biological compatibility.

Device and method for measuring a property of living tissue

For measuring the concentration of a substance in body fluid, such as the glucose level in blood or tissue, a strip electrode () and a ring electrode () are arranged at the specimen. The ring electrode () is in direct electrical contact with the specimen while the strip electrode () is electrically insulated therefrom. The strip electrode () is arranged parallel to an arm or a leg for obtaining a large interaction length. The electrodes () form a capacitor in a resonant circuit. A modulated voltage in the MHz range close to or at the resonance frequency is applied to the electrodes and the response of the body fluid is measured. This design allows a measurement of high accuracy.

Method and device for determining the concentration of a substance in body liquid

One aspect of the invention provides a device that non-invasively determines the concentration of a substance in a target. The device includes a first electrode, a measuring circuit, and a data processor. In one embodiment of the device, the first electrode can be electrically insulated from the target, e.g., a cover layer of insulating material covers the first electrode.

Impedance spectroscopy based systems and methods

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Cham, Switzerland

Etienne Hirt