Tissue penetration device

  • US 8,360,991 B2
  • Filed: 12/23/2005
  • Issued: 01/29/2013
  • Est. Priority Date: 06/12/2001
  • Status: Active Grant
First Claim
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1. A method of lancing the tissue of a patient comprising:

  • (a) providing an electromagnetic driver having a tissue penetration element having a tip configured to penetrate tissue and a shaft portion;

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

    (c) driving the tissue penetration element distally towards the tissue of the patient;

    (d) determining contact between the tip and the tissue of the patient;

    (e) advancing the tip into the tissue during a penetration stroke to a position of maximum inward displacement that is determined electronically via a position sensor;

    (f) monitoring motion of the tissue penetration element and allowing the tissue penetration element to settle upon reaching the point of maximum inward penetration for at least about 1 millisecond with no driving force imposed on the tissue penetration element until any motion of the tissue penetration element has stopped; and

    (g) displacing the tissue penetration element proximally over a withdrawal stroke and removing the tip from the tissue, the allowing the tissue penetration element to settle upon reaching the point of maximum inward penetration for at least about 1 millisecond and displacing the tissue penetration element creating a spontaneous flow of a blood sample without milking.

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