Method and apparatus for penetrating tissue

  • US 8,905,945 B2
  • Filed: 03/29/2012
  • Issued: 12/09/2014
  • Est. Priority Date: 04/19/2002
  • Status: Active Grant
First Claim
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1. A body fluid sampling system for use on a tissue site, the system comprising:

  • a housing;

    a controllable drive force generator with an electronic brake;

    a plurality of penetrating members operatively coupled to said controllable drive force generator, said controllable drive force generator moving each of said members 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;

    a processor coupled to the controllable drive force generator;

    providing for controlled velocity and a controlled depth of penetration of a penetrating member;

    a plurality of analyte detecting members in a sample chamber, each sample chamber configured to receive body fluid from a wound in tissue created by a penetrating member, and each analyte detecting member configured to determine at least one analyte level using a body fluid sample of less than about 1 microliter;

    a support member disc with a surface that includes said penetrating members, said support member disc being movable to move each of said penetrating members to a launch position associated with said force generator; and

    said controllable drive force generator and processor configured to provide a controllable velocity trajectory into the tissue and out of said tissue and controllable depth of penetration of a penetrating member, the processor modulating power to the controllable drive force generator through a signal generator so that a velocity profile of the penetrating member does not exceed a predetermined profile by more than a preset error limit.

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