Patent ID: 7700372

Claim:
A method for monitoring whether an abnormal change occurs in a health condition based on whether a change in a level of analyte concentration occurs in a source, comprising: providing multiple unitary test devices, each unitary test device including a plurality of regions, each region responsive at a different sensitivity level to indicate presence of the analyte in the source; bringing a first sample from the source into contact with a first of the unitary test devices at a first time, there being a visually observable response in one or more regions of the first test device if the source contains at least a minimum level of analyte concentration; and subsequently bringing a second and different sample from the same source into contact with a second of the unitary test devices at a second time to determine whether a change in the health condition occurs based on whether an abnormal change in analyte level occurs by the second time, there again being a visually observable response in one or more regions of the second test device if the source contains at least a minimum level of analyte concentration, wherein determination of whether the health condition changes adversely is based on capillary flow of each sample from a sample receiving region on one of the first or second test devices to one or more of the plurality of regions on the same test device and the response on each device is based on an amount of binding of an antigen and an antibody to form complexes.