Patent ID: 6521182
Filing Date: 2003-02-18
Classification: B01L,G01N,Y10T

Abstract:
A fluidic diagnostic device for measuring an analyte concentration or property of a biological fluid, comprising:a first layer and second layer, at least one of which has a resilient region over at least a part of its area, separated by an intermediate layer, in which cutouts in the intermediate layer form, with the first and second layers, a sample port for introducing a sample of the biological fluid into the device; a first measurement area, in which a physical parameter of the sample is measured and related to the analyte concentration or property of the fluid; a first channel, having a first end and a second end, to provide a fluidic path from the sample port at the first end through the first measurement area; a first bladder, at the second end of the first channel, comprising at least a part of the resilient region in at least the first or second layer and having a volume that is at least about equal to the combined volume of the first measurement area and first channel; and a first stop junction in the first channel between the first measurement area and first bladder that further comprises a co-aligned through hole in the first or second layer, the through hole overlaid with a third layer, wherein fluid flowing into the stop junction is stopped.