Patent ID: 6689317
Filing Date: 2004-02-10
Classification: G01N

Abstract:
An immunoassay analytical test apparatus for screening for the presence of an analyte in a sample of body fluid obtained from an animal subject, said apparatus comprising:a) a first flow path including a sample receiving zone for receiving said sample; b) a second flow path including non-immobilized labelled immunoreactive material that can interact with said analyte; c) a mobile phase receiving zone for receiving a mobile phase, said mobile phase receiving zone being in communication with said first and second flow path; and d) a detection zone including an immunoadsorbant for binding said analyte when said analyte is present in said sample; wherein said first flow path allows flow of said sample in said mobile phase from said sample receiving zone to said detection zone where said analyte present in said sample is allowed to substantially bind with said immunoadsorbant; and said second flow path allows flow of said labelled immunoreactive material in said mobile phase to said detection zone without passing through said sample receiving zone; said first and second flow paths being arranged and configured such that said labelled immunoreactive material arrives at said detection zone substantially after said sample has reached said detection zone, whereby said labelled immunoreactive material is allowed to substantially bind to said analyte when said analyte has bound to said immunoadsorbant, so as to provide an indication of the presence of said analyte in said sample.