Patent ID: 7331931

Claim:
A body fluid sampling system for use on a tissue site, the system comprising: an electrically powered drive force generator; a penetrating member operatively coupled to said drive force generator, said drive force generator moving said member along a path out of a housing having a penetrating member exit, into said tissue site, stopping in said tissue site, and withdrawing out of said tissue site; an analyte sensor associated with the penetrating member; a cartridge housing said penetrating member and said analyte sensor, said cartridge having a first and a second seal coupled to said penetrating member to maintain a sterile environment around a portion of the penetration member prior to penetrating member actuation; and a user interface coupled to a processor, wherein in response to an input at the user interface by a user the processor providing an input to the drive force generator of a lancing penetration parameter selected from at least one of, penetrating member depth of penetration, velocity, braking, or retraction.