Patent ID: RE43815

Claim:
A test strip, having an indentation along an edge for tactile identification of a sample application port, said test strip comprising: a first insulating substrate having first and second surfaces, an indentation along an edge and a vent hole; at least two electrically conductive tracks affixed to the first surface of the first insulating substrate; a second insulating substrate having first and second surfaces, an indentation along an edge, and first and second openings, the second surface being affixed to the conductive tracks and the first surface of the first insulating substrate, the first opening exposing a portion of the conductive tracks for electrical connection to a meter capable of measuring an electrical property, the second opening being located along said edge and exposing a different portion of the conductive tracks and the vent hole; a test reagent overlaying at least a portion of the conductive tracks exposed by the second opening; and a roof having first and second surfaces and an indentation along an edge, the second surface of the roof being affixed to the first surface of the second insulating substrate and positioned so that the second surface of the roof and the surface of the first insulating substrate form opposing walls of a capillary fill chamber with a sample application port at said edge of the second insulating substrate, wherein the second opening in the second insulating substrate and the indentations in the first insulating substrate, the second insulating substrate, and the roof are aligned to thereby provide for tactile identification of the sample application port.