Patent ID: 8304207

Claim:
A method of measuring a blood sample on a blood test instrument using a disposable cartridge comprising: (a) introducing a blood sample into a disposable cartridge, said cartridge comprising multiple receptacles; at least one of said multiple receptacles containing a first liquid agent and at least one of said multiple receptacles containing a washing liquid; (b) placing said cartridge into a blood test instrument, said instrument comprising a cell counting station; (c) mixing a portion of said blood sample with said first liquid agent in said receptacles of said cartridge to form a mixture; (d) delivering said mixture from said cartridge through a first conduit of said blood test instrument to said cell counting station, and measuring said mixture as said mixture passing through said cell counting station from a first side to a second side thereof; and (e) then, withdrawing said wash liquid from said cartridge, and delivering said washing liquid from said second side to said first side of said cell counting station, to clean said cell counting station and to cause said mixture returning to said cartridge through said first conduit of said instrument.