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Method and apparatus for penetrating tissue

  • US 7,547,287 B2
  • Filed: 12/31/2002
  • Issued: 06/16/2009
  • Est. Priority Date: 04/19/2002
  • Status: Expired due to Term
First Claim
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1. A tissue penetrating system, comprising:

  • a housing member;

    an electrically driven drive force generator;

    a plurality of penetrating members positioned in the housing member, wherein each of the penetrating members is coupled to the drive force generator;

    a tissue stabilizing member coupled to the housing and configured to stabilize tissue prior to a lancing event;

    a penetrating member position sensor coupled to the plurality of penetrating members and measures actual depth of penetration by a penetrating member based on a penetrating member contact point that is measured prior to a lancing event,a processor coupled to the penetrating member sensor and the drive force generator, operatively programmed with software that has control instructions for the electronically driven drive force generator to keep a wound tract created by a penetrating member open for a sufficient time to provide for spontaneous flow of blood for sample capture into an associated sample with a controlled blood volume of no more than 1 μ

    L, wherein the control instructions are selected from at least one of, velocity of a penetrating member, velocity of a penetrating member in or out of target tissue and a dwell time of a penetrating member in the tissue site; and

    wherein a time and position of tissue contact and depth of penetration is determined in response to the processor knowing, a distance of the penetrating member tip from a target tissue, acceleration and displacement of a penetrating member, and a start position of the penetrating member.

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