Patent ID: 6027943
Filing Date: 2000-02-22
Classification: G01N,Y10S

Abstract:
An immunochemical assay device comprising:a base member;an array disposed on said base member, said array comprising:(i) a reservoir pad having sufficient porosity and volume to receive and contain a liquid;(ii) a wicking membrane disposed distally to said reservoir pad, said wicking membrane having sufficient porosity and volume to absorb a substantial proportion of the sample received in said reservoir pad; and(iii) at least one first filter zone which is separate and distinct from said reservoir pad and wicking membrane, and interposed between and contiguous with said wicking membrane and said reservoir pad, said first filter zone having impregnated therein one or more labelled immunochemical components capable of binding to or competing with one or more analytes of interest in said sample to form one or more immuno-complexes;(iv) at least one second filter zone which is separate and distinct from said reservoir pad, said wicking membrane and said first filter zone, and contiguous with said wicking membrane, and said first filter zone, said second filter zone having sufficient porosity and volume to receive and containing a liquid sample on which the assay is to be performed;at least one additional immobilized immunochemical component disposed in at least one assay indicia zone of said wicking membrane downstream of said reservoir pad and defining assay indicia.