Publication

Wearable and Battery-Free Health-Monitoring Devices With Optical Power Transfer

Résumé

Wireless epidermal wearable devices attract interests and expectations as a tool for personalized, low-cost health monitoring technology. The concept of the wireless attachable personal health monitoring devices has been more widely considered by combining them with biosensors. To bring the most advantage out of the structure of the epidermal attachable device, a battery-free approach was introduced to reduce the volume and extend the lifetime of the device. In this work, an energy harvesting technology and noninvasive sensor were applied with the attachable battery-free devices as a wireless power system and painless measuring system. A glucose sensor was used as an example to develop the wireless wearable device for diabetes-monitoring. The device consists of two functional parts: an optical power transfer and an electrochemical sensing part. The operation starts when the optical power transfer part accumulates power from series-connected photovoltaic cells and intermittently supplies the power to the electrochemical sensing part. In the electrochemical sensing part, an amperometric method was used for controlling the oxidation voltage and measuring a faraday current from the noninvasive sensor and current as brightness and duration of light pulses from a light-emitting diode (LED). The experiment results show that the device works as expected for a variety of glucose concentrations.

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Concepts associés (37)
Blood glucose monitoring
Blood glucose monitoring is the use of a glucose meter for testing the concentration of glucose in the blood (glycemia). Particularly important in diabetes management, a blood glucose test is typically performed by piercing the skin (typically, via fingerstick) to draw blood, then applying the blood to a chemically active disposable 'test-strip'. The other main option is continuous glucose monitoring (CGM). Different manufacturers use different technology, but most systems measure an electrical characteristic and use this to determine the glucose level in the blood.
Continuous glucose monitor
A continuous glucose monitor (CGM) is a device used for monitoring blood glucose on a continual basis by insulin-requiring people with diabetes, e.g. people with type I, type II diabetes or other types of diabetes (e.g. gestational diabetes). A continuous glucose monitor consists of three parts: a small electrode placed under the skin, a transmitter sending readings at regular intervals (ranging from every 1 to 15 min), and a separate receiver.
Glucomètre
Un glucomètre ou lecteur de glycémie est un appareil permettant de mesurer rapidement le taux de glucose dans le sang (la glycémie), le plus souvent sur du sang capillaire. Ce type d'appareil est utilisé à l'hôpital par les soignants ou à domicile par les patients, notamment en cas de diabète sucré. Il existe plusieurs termes pour désigner cet appareil comme dextro (de la marque dextrostix) ou HGT (de la marque haemoglukotest).
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