Tissue penetration device

  • US 8,216,154 B2
  • Filed: 12/23/2005
  • Issued: 07/10/2012
  • Est. Priority Date: 06/12/2001
  • Status: Expired due to Fees
First Claim
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1. A method of lancing the tissue of a patient comprising:

  • (a) providing a tissue penetration element having a tip configured to penetrate tissue;

    (b) disposing the tissue penetration element in proximity to the tissue of the patient;

    (c) initiating a lancing cycle including advancing a tip of the tissue penetration element into the tissue during a penetration stroke and displacing the tissue penetration element proximally over a withdrawal stroke;

    (d) acquiring tissue data based on an interaction between the tissue penetration element and the tissue during at least a portion of the lancing cycle;

    (e) using a processor to determine that a skin surface has been contacted by the tissue penetration element when the tip of the tissue penetration element has moved a predetermined distance with respect to an initial position; and

    position of the tissue penetration element via an electronic drive force generator;

    (f) using tissue data for feedback control for the processor and provide for velocity control;

    (g) controlling a tissue penetration element velocity into and out of the tissue to allow for compensation for changes in skin thickness and variations in skin hydration; and

    (h) achieving spontaneous blood yield.

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