Patent ID: 7674232

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 electrically powered drive force generator, said electrically powered drive force generator moving said penetrating member along a path out of a housing that has a penetrating member exit, into said tissue site, stopping in said tissue site, and withdrawing out of said tissue site, wherein a sample of a body of fluid flows from the tissue site and into a sample chamber; an analyte sensor associated with the penetrating member and the sample chamber, the analyte sensor measuring a value associated with the sample of the body fluid; a processor with a memory that includes stored information of (i) a distance of a penetrating member tip from a target tissue, (ii) acceleration and displacement of the penetrating member; and (iii) a start position of the penetrating, the processor using the stored information implemented to calculate depth of penetration of the penetrating member, the processor being coupled to an amplifier to modulate power from a power supply to the electrically powered drive force generator; and a tissue stabilizing member associated with the device and at least partially surrounding an impact location of the penetrating member on said tissue site.