Patent ID: 7297151

Claim:
A device for use with a body fluid sampling device for extracting bodily fluid from an anatomical feature, said device comprising: a cartridge having a plurality of cavities; a plurality of penetrating members, at least one of said plurality of penetrating members being contained in one of said plurality of cavities of the cartridge, the penetrating members being slidably movable to extend outward from openings on said cartridge to penetrate tissue; a plurality of analyte detecting members; a plurality of sample chambers, each associated with one of said cavities, said sample chambers being positioned along an outer periphery of said cartridge; wherein at least one of said analyte detecting members forms a portion of one wall of one of said plurality of sample chambers; and a position sensor coupled to the plurality of penetrating members, and to a processor; the position sensor and processor measuring a distance from an initialization point to a point of contact of a penetrating member to a target tissue surface, the penetrating member being retracted by a drive force generator to the initialization point with a distance to the target tissue being measured and a depth of penetration of the penetrating member determined.