Abstract: The invention relates to a filter device for use in diagnostic assay procedures for the effective separation of unwanted particulate matter from the liquid sample of an analyte. The device comprises plural sheet-like cappillary forms prepared from porous media, and that are able to receive and filter the liquid sample. The filter is so configured that, as the pores of the porous media become blocked, the liquid and any particulate matter contained therein are able to travel laterally, and then transversly, to unblocked regions of pores, thereby facilitating optimal speed and efficiency of sample processing. The invention extends to test kits for medical technologists that embody the filter device, and to corresponding methods of testing comprising the separation of particulate matter from samples such as body fluids and the like.

Abstract: A medical diagnostic test kit includes a rectangular flat bottom member having an external raised flange and an internal raised flange forming a cavity therein; an elongated dry chemistry membrane held within the cavity; an arcuate cover member secured to the bottom member with the membrane therebetween; and a funnel assembly comprising a funnel member removably attached to the cover member with its nozzle portion extending into a sample opening in the cover member.