LATERAL FLOW ASSAY READER BASED ON HUMAN PERCEPTION AND METHOD RELATING THERETO

    公开(公告)号:US20180149600A1

    公开(公告)日:2018-05-31

    申请号:US15794998

    申请日:2017-10-26

    发明人: Robert P. Farrell

    摘要: An instrument for reading a lateral flow assay device by detecting color changes based on human perception includes an optics module having a camera, a signal processor, a storage memory and a comparator circuit. The storage memory has stored therein a dataset of sample readings of reference assay devices similar in structure and function to that of the lateral flow assay device. The sample readings are based on human visual perceptions of colorimetric changes in the detection zones of the reference assay devices. The comparator circuit compares the measured colorimetric data relating to the assay device read by the instrument with the stored database of sample readings based on human visual perceptions of the colorimetric changes of the reference assay devices, and generates a comparison signal which is provided to the signal processor. The signal processor generates a determination signal indicative of the presence, absence or quantity of an analyte.

    SENSOR HEAD FOR USE WITH IMPLANTABLE DEVICES

    公开(公告)号:US20180024086A1

    公开(公告)日:2018-01-25

    申请号:US15720329

    申请日:2017-09-29

    申请人: DexCom, Inc.

    摘要: The present invention provides a sensor head for use in an implantable device that measures the concentration of an analyte in a biological fluid which includes: a non-conductive body; a working electrode, a reference electrode and a counter electrode, wherein the electrodes pass through the non-conductive body forming an electrochemically reactive surface at one location on the body and forming an electronic connection at another location on the body, further wherein the electrochemically reactive surface of the counter electrode is greater than the surface area of the working electrode; and a multi-region membrane affixed to the nonconductive body and covering the working electrode, reference electrode and counter electrode. In addition, the present invention provides an implantable device including at least one of the sensor heads of the invention and methods of monitoring glucose levels in a host utilizing the implantable device of the invention.