Patent ID: 7548772
Filing Date: 2009-06-16
Classification: G01N

Abstract:
1. A medical diagnostic device for measuring an analyte concentration of an electrically conductive biological fluid, comprising a multilayer structure having a first layer and a second layer sandwiching an intermediate layer, a) the first and second layers each comprising an insulating sheet, having a conductive surface adjoining the intermediate layer, b) the intermediate layer being an insulating layer with a cutout, having a first end and a second end, which, together with the first and second layers, defines a capillary channel to permit the sample to flow from the first end to the second end, c) the capillary channel comprising d) the conductive surface of one of the first and second layers having a first insulating pattern scored into its conductive surface to divide the conductive surface into two regions, insulated from each other, wherein the first insulating pattern has at least one serration with the capillary channel, whereby sample that flows across the first insulating pattern provides a conductive path from the first end to the second end.