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Instruments and system for producing a sample of a body fluid and for analysis thereof

  • US 9,186,104 B2
  • Filed: 04/29/2013
  • Issued: 11/17/2015
  • Est. Priority Date: 04/30/2007
  • Status: Active Grant
First Claim
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1. An instrument for producing a body fluid sample for analysis by piercing skin with a lancing element having a piercing tip, the instrument comprising:

  • a housing;

    a lancing drive within the housing for driving a lancing element connected thereto in a puncturing movement in which the lancing element moves, after triggering the puncturing movement, in a puncture direction until the lancing element reaches a point of maximum displacement and in a reverse direction after the lancing element has reached the point of maximum displacement;

    a pressure ring configured to be pressed against the skin such that the skin bulges into a skin contact opening for promoting expression of body fluid, wherein the pressure ring defines an opening area corresponding to a circle with a diameter of at least 3 mm and at most 8 mm; and

    a pressing force control device for controlling a pressing force between the pressure ring and the skin at the time of triggering the puncturing movement, wherein the pressing force at the time of triggering is at least 3 N and at most 8 N,wherein the instrument works without a z-position detection means and without a penetration depth reference element configured for contacting the skin that bulges into the pressure ring.

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