Patent ID: 7833746

Claim:
A blood test instrument comprising: (a) a cell counting station comprising an orifice permitting blood cells in a fluid passing therethrough one at a time, and equipped to enumerate said blood cells when said blood cells pass through said orifice; (b) a pressure actuating component adapted to apply a pressure alternately on two flexible receptacles of a disposable cartridge removably placed within said instrument to cause flowing of a mixture of a blood sample and a liquid agent back and forth between said two receptacles to affect mixing of said mixture within said cartridge; and (c) a first conduit connecting to said cell counting station at one end and having a piercing component at another end, said piercing component disposed adjacent to said disposable cartridge and adapted to be inserted to one of said receptacles to deliver said mixture contained in said cartridge to pass through said orifice of said cell counting station for counting.